Application Notes
LTPP Distress Identification Manual Sets a Standard for States: Illinois, Michigan, Mississippi, Missouri, Nevada, and Oklahoma Use
Manual as a Baseline for Identifying and Quantifying Distresses
FHWA-RD-02-052
This document describes how States are using the Long-Term
Pavement Performance (LTPP) program's Distress Identification Manual to plan
and implement pavement products. The manual uses drawings, text, and color
photographs to show common types of distress found in asphalt cement, jointed
portland cement concrete, and continuously reinforced concrete pavements.
www.tfhrc.gov/pavement/ltpp/pdf/02052.pdf
LTPP Findings Pay Off for Pennsylvania: Change in Pavement Joint Design Standard Saves Pennsylvania Money and Reduces Construction Problems
FHWA-RD-00-064
This document describes how the Pennsylvania Department of Transportation decided to change its practice of using skewed joints after
reviewing the results of a Long-Term Pavement Performance (LTPP) program
analysis project. The project analyzed LTPP pavement performance data to
identify what did and did not work to control the development of joint
faulting.
www.tfhrc.gov/pavement/ltpp/pdf/00064.pdf
New Software Tool Paves the Way for More Cost-Effective,
Durable Roads in Kansas: Kansas Relies on LTPPBind Software to Select Superpave
Binder PGs
FHWA-RD-00-019
This document explains how the Kansas Department of
Transportation uses LTPPBind to select its Superpave® binder performance
grades.
www.tfhrc.gov/pavement/ltpp/pdf/00019.pdf
CD-ROM
Guide to Developing Performance-Related Specifications for PCC Pavements
FHWA-RD-00-094
This CD-ROM contains a four-volume report presenting model
performance-related specifications for portland cement concrete pavements, along
with step-by-step procedures for
developing and using performance-related specifications.
PDC Phone: 301-577-0818,
Fax: 301-577-1421,
report.center@fhwa.dot.gov
Product Briefs
DataPave 3.0: User-Friendly Access to LTPP Data
FHWA-RD-02-032
This document describes DataPave, a user-friendly software package that contains most of the data available from the Long-Term Pavement Performance (LTPP) program experiments, including inventory, material testing, pavement performance monitoring, climatic, traffic, maintenance, rehabilitation and seasonal testing data from 2,500 pavement test sections. The program brings LTTP data and a set of tools for searching, viewing, and manipulating the data to the desktop.
www.tfhrc.gov/pavement/ltpp/pdf/02032.pdf
DataPave Online: Improving Pavement Design through Performance Data Analysis
FHWA-RD-03-079
This document describes DataPave Online, a Web site that simplifies the task of providing worldwide access to the Long-Term Pavement Performance (LTPP) program data. Programmers can update the online database quickly with each new LTPP data release, providing access to the latest data when available. In addition, LTPP reference documents are available on the site for users to download.
http://www.fhwa.dot.gov/pavement/ltpp/news.cfm
DataPave: User-Friendly Access to LTPP Data
FHWA-RD-99-051
This document announces a simple, user-friendly CD-ROM software package that contains most of the data available from Long-Term Pavement Performance program experiments. These data include inventory, material testing, pavement performance monitoring, climatic, traffic, maintenance, rehabilitation, and seasonal testing data from pavement test sections at 900 locations on in-service highways throughout North America.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
LTPPBind: A New Tool for Selecting Cost-Effective Superpave
Asphalt Binder Performance Grades
FHWA-RD-99-082
This document describes LTPPBind, a new software tool
developed by the Long-Term Pavement Performance program to help highway
agencies select the most suitable and cost-effective Superpave® performance
grade for a particular site.
http://www.fhwa.dot.gov/pavement/ltpp/pbriefs.cfm
Manuals Provide Information for Pavement Maintenance and
Repair
FHWA-RD-00-084
This document summarizes the Long-Term Pavement Performance
(LTPP) program's efforts to revise and update the original Strategic Highway
Research
Program manuals with pertinent long-term performance and cost-effectiveness
information generated by its continued monitoring of LTPP test sections.
www.tfhrc.gov/pavement/ltpp/pdf/00084.pdf
Rigid Pavement Design Software: A New Tool for Improved Rigid Pavement Design
FHWA-RD-99-129
This document describes the Rigid Pavement Design software program. The software allows engineers to tailor rigid pavement design to site-specific conditions, materials, traffic, and design details. The resulting design is more cost-effective and
reliable.
www.tfhrc.gov/pavement/ltpp/pdf/99129.pdf
Temperature Prediction and Adjustment Procedures for Asphalt Concrete Pavements
FHWA-RD-01-081
This document describes a model for predicting the temperature in an asphalt layer from surface temperature data collected during routine deflection, along with procedures to adjust deflection testing results for temperature.
www.tfhrc.gov/pavement/ltpp/pdf/01081.pdf
Videotapes Explain the How and Why of LTPP's Revised Resilient Modulus Laboratory Tests and Procedures
FHWA-RD-99-162
This document describes videotapes that inform users about a
standardized laboratory procedure developed by the Long-Term Pavement Performance program to measure the resilient modulus of subgrade materials, along with a related laboratory startup and calibration verification procedure.
www.tfhrc.gov/pavement/ltpp/pdf/99162.pdf
Working With Your FWD Calibration Center Videotape
FHWA-RD-99-163
This document describes a videotape that the Long-Term
Pavement Performance (LTPP) program produced in 1997 that explains the how and
why of LTPP's falling-weight deflectometer calibration procedures.
www.tfhrc.gov/pavement/ltpp/pdf/99163.pdf
TechBriefs
Accuracy of LTPP Traffic Loading Estimates
FHWA-RD-98-124
This document presents a study that analyzed the effect of
varying truck load rates and data-collection plans on equivalent single-axle
load (ESAL) estimates at sample sites in the Long-Term Pavement Performance
(LTPP) program database. Results of the analysis are documented in a report
entitled Results of the Empirical Analysis of Alternative Data Collection
Sampling Plans for Estimating Annual Vehicle Loads at LTPP Test Sites. The
purpose of this document is to present key findings and products that resulted
from the report.
www.tfhrc.gov/pavement/ltpp/pdf/98124.pdf
Adequacy of Rut Bar Data Collection
FHWA-RD-01-027
This document presents information about pavement rutting
and data collection. Rutting is a critical distress in flexible pavements that poses a serious safety hazard. The importance
of timely corrective action for rutted pavements-coupled with the need for safe
and efficient data collection-has led many State highway agencies to use
automated survey vehicles to collect the data needed to assess and monitor
rutting. Typically, these devices measure the distance from a reference point
on the survey vehicle to the pavement surface at three or five points across
the pavement width. The data are then used to compute an estimate of the depth
of pavement rutting.
www.tfhrc.gov/pavement/ltpp/pdf/01027.pdf
Comparison of Rehabilitation Strategies for AC Pavements
FHWA-RD-00-166
This document summarizes the results of a Long-Term Pavement
Performance (LTPP) program SPS-5 experiment, entitled "Performance of Rehabilitated
Asphalt Concrete Pavements in the LTPP Experiments-Data Collected Through
February 1997." The study documents performance trends of the 17 SPS-5 projects
using distress data collected through February 1997.
www.tfhrc.gov/pavement/ltpp/pdf/00166.pdf
Full-Scale Accelerated Testing of Ultra-Thin Whitetopping Pavements
FHWA-RD-99-087
This document presents a study that addresses the effects of
overlay thickness, joint spacing, and fiber reinforcement on the performance of
ultra-thin whitetopping pavements.
Library
Help With Converting Pavement Smoothness Specifications
FHWA-RD-02-112
This document reveals that pavement smoothness is a key
factor in determining highway user satisfaction. To represent drivers' opinions
of roadway conditions adequately, many highway agencies are transitioning to
the International Roughness Index (IRI) or the Profile Index (PI), using a
0.0-millimeter (mm) blanking band (PI 0.0) rather than the PI using a 5- or
2.5-mm (.2- or .098-inch) blanking band (PI 5-mm or PI 2.5-mm). This change has
led to the need for correlation equations to relate the current PI 5-mm or PI
2.5-mm smoothness specification levels to those in the new specifications.
www.tfhrc.gov/pavement/ltpp/reports/02112/02112.htm
Improved Prediction Models for PCC Pavement Performance-Related Specifications
FHWA-RD-00-154
This document describes a study with the main objective of
improving the distress and smoothness prediction models used in the
performance-related specifications approach for jointed plain concrete
pavements. It also provides guidelines for calibrating these models for local conditions. Both the
improved prediction models and the calibration procedures were implemented in
the PaveSpec 3.0 performance-related specifications software.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
Key Findings from LTPP Distress Data
FHWA-RD-02-031
This document discusses key differences between two
approaches to pavement distress data collection within the Long-Term Pavement
Performance (LTPP) program-"manual" distress surveys and photographic surveys.
www.tfhrc.gov/pavement/ltpp/pdf/02031.pdf
Performance Trends of Rehabilitated AC Pavements
FHWA-RD-00-165
This document summarizes the results of a Long-Term Pavement
Performance (LTPP) program GPS-6 experiment, entitled "Performance of
Rehabilitated Asphalt Concrete Pavements in the LTPP Experiments-Data Collected
Through February 1997." The study documents performance trends of the 125 GPS-6
test sections using distress data collected through February 1997.
www.tfhrc.gov/pavement/ltpp/pdf/00165.pdf
Portland Cement Concrete (PCC) Partial-Depth Spall Repair
FHWA-RD-99-177
This document examines the merits and deficiencies of
current spall repair materials and practices. The primary aim of the
partial-depth spall repair study was to determine the most effective and
economical materials and procedures for placing quality, long-lasting
partial-depth patches in jointed concrete pavements. Spalling is a common
distress in jointed concrete pavements. It reduces pavement serviceability, and
if left unrepaired, it can become hazardous to highway users.
www.tfhrc.gov/pavement/ltpp/pdf/99177.pdf
Pothole Repair
FHWA-RD-99-202
This document describes a pothole experiment to determine
which combinations of materials and patching procedures provide the most cost-effective repair of potholes in
asphalt concrete-surfaced pavements.
Library and www.tfhrc.gov/pavement/ltpp/pdf/99202.pdf
Reducing Roughness in Rehabilitated Asphalt Concrete
Pavements
FHWA-RD-98-149
This document presents a summary explanation of how much
different rehabilitation treatments reduce roughness in pavements. It is based on a Long-Term Pavement Performance program study on "The Investigation of Development of Pavement Roughness."
www.tfhrc.gov/pavement/ltpp/pdf/98149.pdf
Resealing Concrete Pavement Joints
FHWA-RD-99-137
This document summarizes publication FHWA-RD-99-137, which
describes a study in which 1,600 joints at five test sites were resealed using
12 sealant materials and four installation methods. For 82 months, field
performance data on the different sealants and installation methods were collected
at each site.
www.tfhrc.gov/pavement/ltpp/pdf/99137.pdf
Roughness Trends of Flexible Pavements
FHWA-RD-98-132
This document presents information on the changes in
roughness of flexible pavements over time and their relationship to design
factors, subgrade conditions, and climatic conditions. The results of this
study were published in FHWA-RD-97-147, Investigation of Development of
Pavement Roughness. This document summarizes those findings.
www.tfhrc.gov/pavement/ltpp/pdf/98132.pdf
Sealing and Filling Cracks in Asphalt Pavements
FHWA-RD-99-176
This document summarizes a study to address deficiencies in
current crack treatment materials, designs, and practices. The Strategic
Highway Research Program and the Federal Highway Administration sponsored the
most extensive investigation of crack treatment effectiveness ever undertaken.
Monitoring and evaluation of these treatments were conducted under the
Long-Term Pavement Performance program.
www.tfhrc.gov/pavement/ltpp/pdf/99176.pdf
Variability of Pavement Distress Data from Manual Surveys
FHWA-RD-00-160
This document presents a study that assesses the variability of the Long-Term Pavement Performance (LTPP) program distress data. The study includes an assessment of manual distress data variability, film-derived distress data variability, and the agreement between manual and film-derived distress
data. The full report is contained in Study of LTPP Distress Data Variability, Volume I (FHWA-RD-99-074). The focus of this document is variability in manually collected pavement distress data.
Library and www.tfhrc.gov/pavement/ltpp/pdf/00160.pdf
What Makes Portland Cement Concrete (PCC) Pavements Rough?
FHWA-RD-98-148
This document presents a summary of how and why roughness
occurs in pavements. It summarizes the findings of a Long-Term Pavement
Performance program study entitled "The Investigation of Development of
Pavement Roughness."
www.tfhrc.gov/pavement/ltpp/pdf/98148.pdf
Technical Reports
Accelerated Aging of Concrete: A Literature Review
FHWA-RD-01-073
This report provides a review of the literature on accelerated aging of concrete. It was undertaken as part of a research project on predicting the long-term environmental performance of portland cement
concrete pavements containing coal fly ash.
www.tfhrc.gov/pubrds/02mar/newpubs.htm
An Investment Benefiting America's Highways: The Long-Term Pavement Performance Program
FHWA-RD-01-094
This report describes the value of the research conducted
under the Long-Term Pavement Performance (LTPP) program, a 20-year effort with a goal of providing data and products that extend pavement life at a reasonable cost. It describes products that LTTP has developed and the benefits derived during the program's first decade, including falling-weight deflectometer calibration procedures and software for implementing rigid pavement design
procedures.
www.tfhrc.gov/pavement/ltpp/pdf/01094.pdf
Analysis of Time-Domain Reflectometry Data From LTPP Seasonal Monitoring Program Test Sections-Final Report
FHWA-RD-99-115
This report highlights procedures designed to produce good estimates of in situ gravimetric moisture content. All of the time-domain reflectometry (TDR) traces in the Long-Term Pavement Performance (LTPP) program database were processed using the approach described in this report. TDR has become one of the most reliable methods for measuring in situ soil moisture content. TDR sensors developed by the Federal Highway Administration are being
used in the LTPP seasonal monitoring program to monitor the in situ moisture content at selected
sites.
www.ntis.gov, PB99-146607
Assessment of LTPP Friction Data
FHWA-RD-99-037
This report provides an assessment of the availability, characteristics, and quality of friction data collected as part of the
Long-Term Pavement Performance study. Also, researchers assessed the availability of related pavement characteristics data.
Library and abstract online: http://www.fhwa.dot.gov/pavement/pub_listing.cfm?areas=LTPP
Assessment of Selected LTPP Materials Data Tables and Development of Representative Test Tables
FHWA-RD-02-001
This report documents an evaluation of selected Long-Term Pavement Performance (LTPP) program materials data tables as of January 2000. Issues addressed include the availability, characteristics, and quality of the data in the selected tables. Data anomalies were identified and corrected where possible, and the cleaned-up data were used to develop representative data tables.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
Assessment of the SPS-7 Bonded Concrete Overlays Experiment: Final Report
FHWA-RD-98-130
This report presents an assessment of the Long-Term Pavement
Performance SPS-7 experiment on bonded concrete overlays. This report provides
background material for a meeting of State agencies held to review the status
of the SPS-7 experiment.
Library and www.tfhrc.gov/structur/program.htm
Backcalculation of Layer Parameters for LTPP Test Sections, Volume I: Slab on Elastic Solid and Slab on Dense-Liquid Foundation Analysis of Rigid Pavements
FHWA-RD-00-086
This report documents the results, using deflection-testing
data, of backcalculation of layer material properties for rigid pavements
included in the Long-Term Pavement Performance program in the United States and
Canada.
Library and www.tfhrc.gov/pavement/ltpp/pdf/00086.pdf
Back-Calculation of Layer Parameters for LTPP Test Sections, Volume II: Layered Elastic Analysis for Flexible and Rigid Pavements
FHWA-RD-01-113
This report documents the procedure and steps used to
backcalculate the layered elastic properties (Young's modulus and the
coefficient and exponent of the nonlinear constitutive equation) from
deflection basin measurements for the Long-Term Pavement Performance (LTPP)
program test sections with a Level E data status. The report summarizes the
reasons MODCOMP4 was selected for computing and analyzing the deflection data,
provides a summary of the results using the linear elastic module (Young's
modulus) for selected test sections, and identifies factors that can have a
significant effect on the results.
www.tfhrc.gov/pavement/ltpp/pdf/01113.pdf
Characterization of Transverse Profiles
FHWA-RD-01-024
This report examines several indices used to quantify and
qualify the transverse profiles of pavement. These indices were studied to
determine typical trends by climate, surface thickness, soil type, and age.
This transverse profile data was collected under the Long-Term Pavement Performance project.
http://ntl.bts.gov/lib/11000/11200/11223/index.html
Common Characteristics of Good and Poorly Performing AC Pavements
FHWA-RD-99-193
This report documents the analysis and findings of a study
conducted to identify the site conditions and design/construction features of flexible pavements that lead to good performance and those that lead to poor performance. Data from the Long-Term Pavement Performance (LTPP) program test sections were used, along with findings from previous and ongoing analyses of LTPP data.
Library and www.ntis.gov, PB2000-102377
Concrete Mixture Optimization Using Statistical Methods: Final Report
FHWA-RD-03-060
This report presents the results of a joint study by the
Federal Highway Administration and the National Institute of Standards and Technology to assess the feasibility of using statistical experiment design and analysis methods to optimize concrete mixture proportions. The laboratory phase of the study indicated that both the classical mixture method and the factorial approach could be applied to the problem of optimizing concrete mixture proportions. The factorial approach was used as the basis for developing an Internet-based computer program, the Concrete Optimization Software Tool, in the second phase of this project.
www.ntis.gov, PB2004-100125
Design and Construction
FHWA-RD-98-113
This report evaluates and analyzes portland cement concrete
pavements to develop recommendations for the design and construction of
long-lived pavements. This volume describes improved pavement distress and
roughness prediction models developed as part of the study. A key focus was to
develop distress and roughness prediction models that incorporate mechanistic principles, but are still practical for use by
State highway agencies.
www.ntis.gov, PB2000-106434
Design and Construction of PCC Pavement, Volume I: Summary of Design Features and Construction Practices that Influence Performance of Pavements
FHWA-RD-98-052
This report evaluates and analyzes portland cement concrete (PCC) pavements to develop recommendations for the design and construction of long-lived pavements. This volume provides a concise summary of the study
results. It includes an overview of the engineering and statistical analyses conducted and presents results State highway agencies can use to obtain high-performance PCC pavements.
www.ntis.gov, PB2002-107537
Design and Construction of PCC Pavement, Volume II: Design Features and Practices that Influence Performance of Pavements
FHWA-RD-98-127
This report evaluates and analyzes portland cement concrete pavements to develop recommendations for the design and construction of
long-lived pavements. This volume provides information on design features and construction practices that improve pavement performance. A key focus was to develop canonical discriminant functions that can be used to tell groups of pavements apart.
www.ntis.gov, PB99-162661
Determination of Frost Penetration in LTPP Sections, Final Report
FHWA-RD-99-088
This report determines frost penetration at selected
seasonal monitoring program sections in the Long-Term Pavement Performance
program. As part of the study, an interactive computer program, FROST, was
developed to facilitate the interpretation of the electrical resistivity and temperature
data. Analysis results include the freeze state at each electrical resistivity
sensor and the frost penetration at each site.
Library and www.ntis.gov, PB2000-102952 and PB99-17556
Development of a Tire/Pavement Contact-Stress Model Based on Artificial Neural Networks
FHWA-RD-99-041
This report presents the first worldwide tire/pavement
contact-stress model based on the artificial neural networks developed by the authors at the Pennsylvania Transportation Institute at Pennsylvania State University. These models represent the first mathematical representation of real, measured contact stress at wide ranges of vertical loads and inflation pressures for two types of tires.
www.ntis.gov, PB2001-103488
Distress Identification Manual for the Long-Term Pavement
Performance Program
FHWA-RD-03-031
This manual provides a common language for describing
cracks, potholes, rutting, spalling, and other pavement distresses being
monitored by the Long-Term Pavement Performance (LTPP) program. Color
photographs and drawings illustrate the distresses found in three basic
pavement types: asphalt concrete-surfaced, jointed (plain and reinforced)
portland cement concrete, and continuously reinforced concrete. Methods for
measuring the size of distresses and for assigning severity levels are given. The manual also describes how to conduct
the distress survey, from obtaining traffic control to measuring the cracks in
the pavement. Sample forms for recording and reporting the data are included.
www.tfhrc.gov/pavement/ltpp/reports/03031/index.htm
Effects of Wheel-Load Spatial Repeatability on Road Damage:
A Literature Review
FHWA-RD-97-036
This report reviews current and past research on
vehicle/road interaction. Two of the most pressing issues in the area of heavy
vehicle-generated road damage are the spatial repeatability of dynamic wheel
loads produced by heavy vehicles and the use of wide-base dual tires. The
outcome of this review plays a determining role in assessing heavy-truck
suspension systems, tire configurations, and their contribution to pavement
damage.
www.ntis.gov, PB99-107435
Estimating Cumulative Traffic Loads, Final Report for Phase 1
FHWA-RD-00-054
This report describes a procedure for obtaining axle load
spectra for pavement sections under study in the Long-Term Pavement Performance
(LTPP) program. The procedure has been demonstrated and evaluated by applying
it to 12 LTPP sections for which different amounts of monitoring traffic
data were available.
Library and Abstract online: http://www.fhwa.dot.gov/pavement/pub_details.cfm?id=65
Evaluation of Joint and Crack Load Transfer: Final Report
FHWA-RD-02-088
This report analyzes the load transfer efficiency of cracks
and joints, which profoundly affects the performance of concrete pavements.
Poor load transfer efficiency may lead to longitudinal cracking and excessive
faulting of jointed concrete pavements and could accelerate punchout development in
continuously reinforced concrete pavements. These distresses could lead to
roughness and poor ride quality.
Library and abstract online: http://www.fhwa.dot.gov/pavement/pub_details.cfm?id=65
Fast-Track Paving: Concrete Temperature Control and Traffic
Opening Criteria for Bonded Concrete Overlays, Volume I: Final Report
FHWA-RD-98-167
This two-volume report presents research that focuses on modeling early-age behavior of portland cement concrete (PCC) pavements and bonded concrete overlays subjected to stresses from moisture and thermal
changes. It includes the development of a two-part, versatile, comprehensive set of guidelines that provide direction on the proper selection of design and construction variables to minimize early-age damage to PCC pavement and bonded concrete overlay. This document presents the final report.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
Fast-Track Paving: Concrete Temperature Control and Traffic
Opening Criteria for Bonded Concrete Overlays, Volume II: HIPERPAV User's
Manual
FHWA-RD-98-168
This two-volume report presents research that focuses on
modeling early-age behavior of portland cement concrete (PCC) pavements and
bonded concrete overlays subjected to stresses from moisture and thermal
changes. It includes the development of a two-part, versatile, comprehensive set of
guidelines that provide direction on the proper selection of design and
construction variables to minimize early-age damage to PCC pavement and bonded
concrete overlay. This volume is a user's manual for HIPERPAVTM.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
Fast-Track Paving: Concrete Temperature Control and Traffic Opening Criteria for Bonding Concrete Overlays, Volume III: Addendum to the HIPERPAV User's Manual
FHWA-RD-99-200
This report is an addendum to the user's manual of the HIPERPAVTM (High Performance Paving) software package. This package incorporates the complex models developed and can be used as a stand-alone product to verify the overall effects of specific combinations of design, construction, and environmental inputs on early-age behavior of portland cement concrete pavement and bonded concrete overlay.
www.ntis.gov, PB2002-101746
Fundamental Properties of Asphalts and Modified Asphalts-Volume
I: Interpretive Report
FHWA-RD-99-212
This report's objective is to improve understanding of the expected performance of petroleum asphalts under service conditions. These conditions include physical behavior of thin asphalt films in contact with aggregate, rheology and oxidative aging of wet asphalt, behavior of asphalt after
extended aging, and propensity of asphalt films to reconsolidate (heal) after
microcracking.
www.ntis.gov, PB2002-100073
Fundamental Properties of Asphalts and Modified Asphalts-Volume
II: Final Report, New Methods
FHWA-RD-99-213
This report presents 16 new methods that distinguish
behavioral characteristics of compositionally diverse petroleum asphalts.
www.ntis.gov, PB2001-108760
FWD Calibration Centers Ensure States Get Quality Data: States Use Falling-Weight Deflectometer (FWD) Data to Develop More Cost-Effective Rehabilitation Strategies
FHWA-RD-02-067
This report addresses the benefits of working with
falling-weight deflectometer (FWD) calibration centers in Minnesota, Nevada,
Pennsylvania, and Texas. The centers help States collect accurate data,
resulting in better decisions on when and where to conduct rehabilitation work,
more cost-effective use of budget dollars targeted for rehabilitation projects,
and better designs for new pavements and overlays.
www.tfhrc.gov/pavement/ltpp/pdf/02067.pdf
Guide to Developing Performance-Related Specifications for
PCC Pavements,Volume I: Practical Guide, Final Report, and Appendix A
FHWA-RD-98-155
This report, the first of a four-volume set, presents
guidelines and recommendations to assist highway agencies in developing and
using performance-related specifications for portland cement concrete pavement
construction.
Library and
www.tfhrc.gov/pavement/pccp/pavespec/vol1/foreword/index.htm
Guide to Developing Performance-Related Specifications for
PCC Pavements,Volume II: Appendix B, Field Demonstrations
FHWA-RD-98-156
This report documents three methods used to demonstrate
revised performance-related specifications (PRS) for portland cement concrete.
In the first method, researchers conducted shadow field trials at four new
construction projects. For the second method, researchers developed level 1
specifications for three typical designs used by a State highway agency. For
the third method, researchers compared historical pay adjustments to PRS-based
price adjustments predicted for the same pavement lots. Each method was used to
investigate how practical PRS is and how easily it could be implemented.
Library and www.tfhrc.gov/pavement/pccp/pavespec/vol2/foreword/index.htm
Guide to Developing Performance-Related Specifications for PCC Pavements, Volume III: Appendices C Through F
FHWA-RD-98-171
This report contains the supporting documentation for the
research study on developing performance-related specifications for portland
cement concrete pavements.
Library and
www.tfhrc.gov/pavement/pccp/pavespec/vol3/foreword/index.htm
Guidelines for Detection, Analysis, and Treatment of Materials-Related Distress in Concrete Pavement, Volume I: Final Report
FHWA-RD-01-163
This report's objective is to develop guidelines to provide
pavement engineers and field and laboratory personnel with a systematic procedure for identifying, evaluating, treating,
and preventing materials-related distress in portland cement concrete (PCC) pavements. The report also points out that
well-designed and constructed PCC pavements are inherently durable and are
expected to be relatively maintenance free during many years of service.
www.tfhrc.gov/pavement/pccp/pubs/01163/index.htm
Guidelines for Detection, Analysis, and Treatment of Materials-Related Distress in Concrete Pavement, Volume II: Guidelines Description and Use
FHWA-RD-01-164
This report on materials-related stress in concrete pavement
is divided into two major sections. The first section addresses the laboratory
procedures used to examine concrete specimens and presents a systematic method
of data collection, recording, and reporting. The second section presents a
systematic approach for interpreting the laboratory data-along with design,
construction, field evaluation, and performance data-to diagnose what distress
mechanisms may be present.
www.tfhrc.gov/pavement/pccp/pubs/01164/index.htm
Guidelines for Detection, Analysis, and Treatment of Materials-Related Distress in Concrete Pavement, Volume III: Case Studies Using the Guidelines
FHWA-RD-01-165
This report documents the investigation of materials-related distress (MRD) in concrete pavements and the development of systematic guidelines for evaluating MRD. The guidelines
cover three major areas of MRD: (1) field distress surveys, pavement sampling, and sample handling; (2) laboratory
testing, data analysis, and interpretation; and (3) treatment, rehabilitation, and prevention.
www.tfhrc.gov/pavement/pccp/pubs/01165/index.htm
Guidelines for the Use of Lithium to Mitigate or Prevent ASR
FHWA-RD-03-047
This report provides information and guidance on testing,
specifying, and using lithium compounds in new concrete construction, as well as in repair and service life
extension applications. This report will be of interest to engineers, contractors, and others involved in the design and
specification of new concrete, as well as those involved in mitigating the damaging effects of alkali-silica reaction in existing
concrete structures.
www.tfhrc.gov/pavement/pccp/pubs/03047
Hot-Mix Asphalt Pavement Construction Report for the 1993-2000 FHWA Accelerated Loading Facility Project
FHWA-RD-99-083
The Federal Highway Administration is conducting studies to
validate Superpave® binder and mixture tests using its accelerated loading facility. This report documents the
mixture designs, construction procedures, and quality control and quality
assurance tests for the asphalt pavement layers.
Library and www.ntis.gov, PB99-155061
Improved Prediction Models for PCC Pavement Performance-Related Specifications, Volume I: Final Report
FHWA-RD-00-130
This report focuses on the improvement of the key distress
and smoothness prediction models used in the performance-related specifications
(PRS) for jointed plain concrete pavement. The PRS methodology, under
development by the Federal Highway Administration for several years, has now
reached a level at which it can be implemented by State highway agencies. PRS for highway pavements depend heavily on
performance prediction models to determine the impact of varying levels of
construction quality. Volume I is the final report.
Library and www.tfhrc.gov/pavement/pubs/00130.pdf
Improved Prediction Models for PCC Pavement Performance-Related
Specifications, Volume II: PaveSpec 3.0 User's Guide
FHWA-RD-00-131
This report focuses on the improvement of the key distress
and smoothness prediction models used in the performance-related specifications
(PRS) for jointed plain concrete pavement. The PRS methodology, under
development by the Federal Highway Administration for several years, has
reached a level at which it can be implemented by State highway agencies. PRS
for highway pavements depend heavily on performance prediction models to
determine the impact of varying levels of construction quality. Volume II is a
user's guide for PaveSpec 3.0.
Library and www.tfhrc.gov/pavement/pubs/00131.pdf
Joint Sawing Guideline: The Window of Opportunity
FHWA-RD-98-172
This report presents information about the importance of
joint sawing in the construction of jointed concrete pavements. The purpose of
sawing joints in new concrete is to create a plane of weakness that will induce
cracking at a desired location.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov
Long-Term Effectiveness of Cathodic Protection Systems on
Highway Structures
FHWA-RD-01-096
This report summarizes an evaluation of the protection
provided by cathodic protection systems and estimates the expected service life
for the anode materials in similar environments. Cathodic protection is the
only rehabilitation technique proven to stop corrosion in salt-contaminated
bridge decks, regardless of the chloride content of the concrete. This
technology is based on the principle of applying an external source of current
to counteract the internal corrosion current produced in reinforced concrete
components. This report will be of interest to engineers involved in bridge
design, maintenance, rehabilitation, and performance evaluation and prediction.
www.tfhrc.gov/pavement/ltpp/reports/01096.htm
Long-Term Monitoring of Pavement Maintenance Materials Test
Sites
FHWA-RD-98-073
This report presents a study that was part of the most
extensive pavement maintenance experiment ever conducted. This study provides
valuable data on the performance and cost effectiveness of various cold-mix
materials and procedures for repairing asphalt concrete-surfaced pavements. The
information derived from this study will advance the state of the practice of response-type pothole-patching operations.
Abstract online: http://www.fhwa.dot.gov/pavement/pub_secondary.cfm?id=216
Long-Term Performance of Corrosion Inhibitors Used in Repair of Reinforced Concrete Bridge Components
FHWA-RD-01-097
This report describes a Strategic Highway Research Program
project (SHRP C-103) that evaluated the effectiveness of using corrosion
inhibitors to mitigate corrosion in reinforced concrete bridge components. This
project, which concluded in 1993, involved a laboratory study and field
validation.
www.tfhrc.gov/pavement/ltpp/reports/01097/
LTPP Maintenance and Rehabilitation Data Review: Final Report
FHWA-RD-01-019
This report provides a detailed review of the Long-Term
Pavement Performance (LTPP) program maintenance and review data and presents
the findings from the review. A total of 757 test sections have undergone some
type of maintenance and review activity. Of these test sections, only 23
anomalies were found. These anomalies consist primarily of sections that have
patching recorded in the maintenance and review tables, but no increase in
patching area or number in the distress surveys.
www.tfhrc.gov/pavement/ltpp/pdf/01019.pdf
LTPP Pavement Maintenance Materials: PCC Partial-Depth Spall Repair Experiment, Final Report
FHWA-RD-99-153
This report documents the Long-Term Pavement Performance
program study on partial-depth spall repair of portland cement concrete,
including the installation of 30 unique repair types at four different test
sites, laboratory testing of experimental repair materials, and 7-year
performance monitoring of the various partial-depth repairs.
Library and www.ntis.gov, PB2000-100915
LTPP Pavement Maintenance Materials: SHRP Crack Treatment Experiment, Final Report
FHWA-RD-99-143
This report presents the Strategic Highway Research Program
(SHRP) H-106 maintenance experiment and the Federal Highway Administration's
Long-Term Monitoring of Pavement Maintenance Materials Test Sites program. The
project studied two distinct asphalt concrete crack treatments:
transverse crack sealing and longitudinal crack filling.
Library and www.ntis.gov, PB2000-102371
LTPP Pavement Maintenance Materials: SHRP Joint Reseal Experiment, Final Report
FHWA-RD-99-142
This report documents a portland cement concrete joint resealing study, including installation of 31 unique joint seal treatments at five different test sites, laboratory testing of experimental sealant materials, and 7-year performance monitoring of the various joint seal
treatments. The study evaluated the relative performance of selected sealant materials and the effect of selected sealant installation methods. The study also identified sealant material properties and tests that correlate well with field performance.
Library and www.ntis.gov, PB2000-102370
LTPP Pavement Maintenance Materials: SPS-4 Supplemental Joint Seal Experiment, Final Report
FHWA-RD-99-151
This report documents the entire Long-Term Pavement
Performance program SPS-4 supplemental joint seal study, including the
installation of 29 unique joint seal treatments, the laboratory testing of
experimental sealant materials, and the multiyear performance monitoring of the
various joint seal treatments. It also discusses the results of comprehensive
statistical analyses conducted on sealant material performance.
Library and www.ntis.gov, PB2000-100914
LTPP Product Plan
FHWA-RD-01-086
This report describes a plan for identifying, developing, and delivering products under the Long-Term Pavement Performance (LTPP) program. It defines LTPP products as ready-to-use guidelines, procedures, protocols, best practices, software, and equipment. Under the plan, LTPP products must pass a means test with specific criteria, including whether the product has a sound technical basis and is supported by formal research
results.
www.tfhrc.gov/pavement/ltpp/pdf/01086.pdf
Materials and Procedures for Rapid Repair of Partial-Depth Spalls in Concrete Pavements-Manual of Practice
FHWA-RD-99-152
This manual of practice is an updated version of the 1993 Strategic Highway Research Program Spall Repair Manual. It contains the latest information on the performance of repair
materials and methods; the availability and relative costs of repair materials;
and the proper ways of planning, designing, constructing, and monitoring the
performance of partial-depth spall repair projects. It also provides an updated
partial listing of materials and equipment manufacturers.
www.tfhrc.gov/pavement/ltpp/pdf/99152a.pdf
Materials and Procedures for Repair of Joint Seals in Portland Cement Concrete Pavements-Manual of Practice
FHWA-RD-99-146
This manual of practice is an updated version of the 1993 Strategic Highway Research Program (SHRP) Joint Seal Repair Manual. The SHRP H-106 maintenance experiment and the Federal Highway Administration's long-term monitoring project also studied the resealing of joints in concrete pavements. Many different sealant materials and resealing methods were investigated from 1991 to 1998 through test sites installed at five U.S. locations.
www.tfhrc.gov/pavement/ltpp/pdf/99146.pdf
Materials and Procedures for Repair of Potholes in Asphalt-Surfaced Pavements-Manual of Practice
FHWA-RD-99-168
This report presents the Strategic Highway Research Program
H-106 maintenance experiment and the Federal Highway Administration Long-Term
Monitoring of Pavement Maintenance Materials Test Sites project that studied
the repair of potholes in asphalt-surfaced pavements. The findings of
these combined studies have been merged with standard highway agency procedures
to provide the most useful and up-to-date information on the practice of
repairing potholes.
Library and www.tfhrc.gov/pavement/ltpp/pdf/99168.pdf
Materials and Procedures for Sealing and Filling Cracks in
Asphalt-Surfaced Pavements-Manual of Practice
FHWA-RD-99-147
This manual of practice is an updated version of the 1993
Strategic Highway Research Program Crack Sealing and Filling Manual. It
contains the latest information on the performance of treatment materials and
methods; the availability and relative costs of sealant/filler materials; and the proper
ways to plan, design, construct, and monitor the performance of crack treatment
projects.
www.tfhrc.gov/pavement/ltpp/pdf/99147a.pdf and www.tfhrc.gov/pavement/ltpp/pdf/99147b.pdf
Measurement and Specification of Construction Quality, Volume I: Final Report
FHWA-RD-98-077
This report presents a study that consisted of testing six
pavement projects, three hot-mix asphalt concrete and three portland cement concrete. The primary objectives were to (1)
determine how quality control test results vary in construction projects and
how this variability affects pavement performance, (2) assess the suitability
of current methods of quantifying materials and construction quality and
quality variability, and (3) develop and improve methods that minimize
shortcomings. Volume I of this report contains information about data analysis.
PDC Phone: 301-577-0818, Fax: 301-577-1421,
report.center@fhwa.dot.gov
Mechanistic Evaluation of Test Data from LTPP Flexible Pavement Test Sections, Volume I: Final Report
FHWA-RD-98-012
This report analyzes how well some existing asphalt pavement
mechanistic-empirical distress prediction models performed when used in conjunction with the data being collected as part of the Long-Term Pavement Performance (LTPP) program. This study shows that, even given the current limitations in the LTPP database, the data can be used successfully to develop
better insights into pavement behavior and improve pavement performance.
www.ntis.gov, PB98-146228
Mechanistic Evaluation of Test Data from LTPP Flexible
Pavement Test Sections, Volume II: Appendices
FHWA-RD-98-020
This document presents the appendices of a report that
analyzes how well some of the existing asphalt pavement mechanistic-empirical distress prediction models performed
when used in conjunction with the data being collected as part of the Long-Term
Pavement Performance (LTPP) program. This study shows that, even given the
current limitations in the LTPP database, the data can be used successfully to
develop a better insights into pavement behavior and improve pavement performance.
www.ntis.gov, PB98-131105
Mechanistic Evaluation of Test Data from LTPP Jointed
Concrete Pavement Test Sections
FHWA-RD-98-094
This report presents a study conducted to assess how well
some mechanistic empirical-based distress prediction procedures for concrete pavement performed when used in
conjunction with data collected as part of the Long-Term Pavement Performance
(LTPP) program. This study showed that, even with the current limitations in
the LTPP database, the data can be used successfully to develop better insights
into pavement behavior and improve pavement performance.
Abstract online:
http://www.fhwa.dot.gov/pavement/pub_secondary.cfm?id=226
Methodology for Determining Compaction Temperatures for
Modified Asphalt Binders
FHWA-RD-02-016
This report documents a Federal Highway Administration study
performed to assist asphalt mixture technologists in choosing an appropriate
laboratory compaction temperature for asphalt mixture design. This temperature
is important because it can affect both the optimum asphalt binder content and
the mechanical properties of an asphalt mixture.
www.tfhrc.gov/pavement/asphalt/pavepubs/02016
Microdamage Healing in Asphalt and Asphalt Concrete, Volume II: Laboratory and Field Testing to Assess and Evaluate Microdamage and Microdamage Healing
FHWA-RD-98-142
This report documents testing in the laboratory and field that provides evidence that microdamage healing in asphalt and asphalt concrete is real, measurable, and has a significant impact on pavement performance.
Library and www.ntis.gov, PB2001-107667
Microdamage Healing in Asphalt and Asphalt Concrete, Volume III: A Micromechanics Fracture and Healing Model for Asphalt Concrete
FHWA-RD-98-143
This report documents the development of a micromechanics
fracture and healing model for asphalt concrete. This model can be used to
calculate the density and growth of microcracks during repeated direct tensile
controlled-strain loading.
Library and www.ntis.gov, PB2001-107668
Microdamage Healing in Asphalt and Asphalt Concrete, Volume
IV: A Viscoelastic Continuum Damage Fatigue Model of Asphalt Concrete With
Microdamage Healing
FHWA-RD-98-144
This report presents a mechanistic approach to fatigue
characterization of asphalt-aggregate mixtures. This approach is founded on a
uniaxial viscoelastic constitutive model that accounts for damage evolution
under cyclic loading conditions.
Library
OECD DIVINE Element 1: Accelerated Dynamic Pavement Testing
FHWA-RD-97-138
This report reveals that the weight of a truck's load
affects the life of pavements and bridges and, therefore, the cost of
maintaining and repairing the Nation's roads. The Organisation for Economic
Cooperation and Development (OECD) Road Transport Research Programme found that
dynamic pavement loading is increasing in OECD countries, resulting in an
increase in the rate of road wear. Although researchers recognize the
relationship between the weight of a truck's load and wear on a roadway, many
questions on the nature and influence of dynamic loading and the interaction
between the vehicle and pavements and bridges remain.
www.ntis.gov, PB99-107401
Optimal Procedures for Quality Assurance Specifications
FHWA-RD-02-095
This manual is a comprehensive guide for highway agencies to
use in developing new or modifying existing acceptance plans and quality
assurance specifications. It provides necessary instruction and illustrative
examples to lead agencies through the entire process of acceptance plan
development.
www.tfhrc.gov/pavement/pccp/pubs/02095/
Pavement Smoothness Index Relationships
FHWA-RD-02-057
This report reveals that nearly all State highway agencies
use smoothness specifications to ensure that hot-mix asphalt and portland
cement concrete pavements are built to high levels of smoothness. Not only is
an initially smooth pavement generally indicative of quality workmanship, but
it also has been shown to last longer than a pavement built with a rougher
level.
www.tfhrc.gov/pavement/ltpp/reports/02057/02057.htm
Performance of Coarse-Graded Mixes at WesTrack-Premature
Rutting
FHWA-RD-99-134
This report discusses the work of a forensic team assembled
to study the early failures of and make recommendations for revising the
Superpave® procedures.
Library and www.ntis.gov, PB99-157984
Performance of Continuously Reinforced Concrete Pavements, Volume V: Maintenance and Repair of CRC Pavements
FHWA-RD-98-101
This report is one of a series prepared as part of a
national pooled fund study administered by the Federal Highway Administration to update the state of the art of the design, construction, maintenance, and rehabilitation of continuously reinforced concrete (CRC) pavements. This report, the fifth in the series, presents results on CRC pavement distress and procedures for repair of CRC pavements. Since the most troublesome problems with CRC pavements are punchout distresses and distresses associated with steel rupture, this report emphasizes repairs of these distresses.
www.ntis.gov, PB99-128308
Performance of CRC Pavements, Volume VI: CRC Pavement Design, Construction, and Performance
FHWA-RD-97-151
This report is part of a series prepared in a study
sponsored by the Federal Highway Administration. The study was aimed at updating the state of the art of the design, construction, maintenance, and rehabilitation of continuously reinforced concrete pavements.
www.ntis.gov
Portable Changeable Message Sign Handbook
FHWA-RD-03-066
This handbook presents basic guidelines for using portable changeable message signs, traffic control devices capable of displaying a variety of messages to inform motorists of unusual driving conditions. It illustrates the principles of proper portable changeable message sign use.
www.tfhrc.gov/pavement/ltpp/reports/03066/
Portland Cement Concrete Rheology and Workability, Final Report
FHWA-RD-00-025
This report describes methods used to determine the
workability of freshly mixed portland cement concrete with slumps of less than
51 millimeters (2 inches). They include two moving-object methods, one free-orifice method, and a vibrating-slope method. The report also outlines modifications to these techniques and equipment to permit the measurement of rheological properties at two or more shear rates.
Library and www.tfhrc.gov/pavement/pccp/pdfs/00025.pdf
Prediction of Chloride Penetration in Concrete
FHWA-RD-00-142
This report's objective was to identify or develop a test for predicting chloride penetration in concrete to be used for evaluating new mixes, accepting or rejecting new concrete according to specifications, and evaluating in-place concrete. The test was intended to supplement or replace the use of AASHTO T27-93, "Electrical Indication of Concrete's Ability to Resist Chloride."
Library and www.ntis.gov, PB2002-100056
Preliminary Evaluation and Analysis of LTPP Faulting Data,
Final Report
FHWA-RD-00-076
This report presents recommendations for improving the
design and construction of new and rehabilitated pavements to make them last
longer, a major goal of the Long-Term Pavement Performance (LTPP) study. As
part of the condition monitoring of LTPP test sections, joint and crack
faulting data are collected regularly at each jointed concrete pavement test
site.
Library and www.tfhrc.gov/pavement/ltpp/pdf/00076a.pdf and
www.tfhrc.gov/pavement/ltpp/pdf/00076b.pdf
Preliminary Evaluation of LTPP Continuously Reinforced Concrete (CRC) Pavement Test Sections
FHWA-RD-99-086
This report presents an analysis of data from the Long-Term
Pavement Performance GPS-5 test sections. It identifies factors that influence
long-term crack spacing in continuously reinforced concrete pavements and
determine the effects of crack spacing on pavement performance. In addition,
data from the 85 test sections from the GPS-5 experiment were analyzed.
Library and www.ntis.gov, PB99-162778
Road Simulator Study of Heavy-Vehicle Wheel Forces
FHWA-RD-98-01
This report investigates the effects of vehicle and road
characteristics on dynamic forces applied by heavy vehicles in pavement. The three main areas analyzed are development of
equipment necessary for the testing program, performance of the tests, and analysis of the test results.
www.ntis.gov, PB99-146730
Study of LTPP Distress Data Variability, Volume I
FHWA-RD-99-074
This report is Volume I of a two-volume set that documents the results of a study to evaluate and quantify the variability of pavement distress data collected in the Long-Term Pavement Performance (LTPP) program. Analyses were performed on both manual and film-derived distress data. General trends of the distress data were first investigated, followed by statistical analyses of repeatability and detection of variability sources.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov, PB01-00588
Study of LTPP Distress Data Variability, Volume II: Appendices A to C
FHWA-RD-99-075
This report is Volume II of a two-volume set that documents
the results of a study to evaluate and quantify the variability of pavement
distress data collected in the Long-Term Pavement Performance (LTPP) program.
Analyses were performed on both manual and film-derived distress data. General
trends of the distress data were first investigated, followed by statistical
analyses of repeatability and detection of variability sources. This volume
presents the appendices.
PDC Phone: 301-577-0818, Fax: 301-577-1421,
report.center@fhwa.dot.gov, PB01-02373
Study of LTPP Laboratory Resilient Modulus Test Data and
Response Characteristics
FHWA-RD-02-051
This report documents the first comprehensive review and
evaluation of the resilient modulus test data measured on pavement materials and soils recovered from the Long-Term
Pavement Performance (LTPP) program test sections. A total of 2,014 resilient
modulus tests have passed all quality control checks and are included in the
LTPP database with a Level E data status. By October 2000, 1,639 resilient
modulus tests still needed to be performed. In some cases, the missing tests
may have been performed but failed to achieve a Level E status (had not passed
all quality control checks) in the LTPP database. These test results, however,
have not been evaluated in detail.
www.tfhrc.gov/pavement/ltpp/reports/02051/02051.htm
Superpave Mixture Design Guide
FHWA-RD-01-052
This mixture design guide for Superpave® was prepared by the
forensic team to meet the asphalt community's needs. It includes observations
on mixture design compaction level determination, performance-graded binder
selection, and aggregate selection. It also includes extensive discussion of the
mixture design process and a summary of laboratory performance tests for
assessing mixture resistance to rutting.
www.tfhrc.gov/pavement/1052.pdf
Temperature Predictions and Adjustment Factors for Asphalt
Pavement
FHWA-RD-98-085
This report presents the results of an analysis of the
deflections and backcalculated asphalt moduli response to pavement temperature.
The study used deflection and temperature data from 40 asphalt pavement sites
monitored in the seasonal monitoring program of the Long-Term Pavement
Performance program.
www.ntis.gov, www.tfhrc.gov/pavement/ltpp/pdf/98085a.pdf,
and www.tfhrc.gov/pavement/ltpp/pdf/98085b.pdf
The Effects of Higher Strength and Associated Concrete
Properties on Pavement Performance
FHWA-RD-00-161
This report presents recommendations for portland cement
concrete properties and materials characteristics found in higher-strength jointed plain concrete pavements. It focuses
on improved long-term performance, determined by joint spalling and faulting,
and transverse slab cracking.
Library and www.tfhrc.gov/pavement/pubs/00161a.pdf
Transport Properties and Durability of Concrete: Literature
Review and Research Plan
FHWA-RD-00-073
This report reviews the state of the art for measuring
transport properties in the laboratory and field, and discusses links between
transport properties and models for various deterioration processes relevant to
highway concretes. The increased emphasis on life-cycle cost analysis for
building projects requires that new attention be focused on the service life
and durability of concrete structures.
Abstract online: http://www.fhwa.dot.gov/pavement/pub_secondary.cfm?id=289
Understanding the Performance of Modified Asphalt Binders in Mixtures: Evaluation of Moisture Sensitivity
FHWA-RD-02-029
This report documents the effects of polymer-modified
asphalt binders on moisture sensitivity. The objective of this report is to
determine if asphalt binder performance is captured by the Superpave® asphalt
binder specification developed under the 1987-1993 Strategic Highway Research
Program. It emphasizes evaluation of the performance of mixtures containing polymer-modified asphalt binders with identical Superpave
performance grades but varied chemistries.
www.tfhrc.gov/pavement/asphalt/pavepubs/02029/
Understanding the Performance of Modified Asphalt Binders in Mixtures: High-Temperature Characterization
FHWA-RD-02-075
This report's objective is to determine if asphalt binder
performance is captured by the Superpave® asphalt binder specification
developed under the 1987-1993 Strategic Highway Research Program. It emphasizes
evaluation of the performance of mixtures containing polymer-modified asphalt binders with
identical Superpave performance grades, but varied chemistries. Although
identical performance grades were desired, the high-temperature performance
grades of the polymer-modified asphalt binders ranged from 71 to 77.
www.tfhrc.gov/pavement/asphalt/pavepubs/02075/index.htm
Understanding the Performance of Modified Asphalt Binders in
Mixtures: Low-Temperature Properties
FHWA-RD-02-074
This report documents the effects of polymer-modified
asphalt binders on the low-temperature cracking resistance of asphalt mixtures.
It emphasizes evaluation of the performance of mixtures containing
polymer-modified asphalt binders with identical Superpave® performance grades,
but varied modification chemistries.
www.tfhrc.gov/pavement/asphalt/pavepubs/02074/index.htm
Understanding the Performance of Modified Asphalt Binders in Mixtures: Permanent Deformation Using a Mixture With Diabase Aggregate
FHWA-RD-02-042
This report documents the effects of polymer-modified asphalt binders on the rutting resistance of a mixture with diabase aggregate.
For the materials tested in this study, good correlations were found between asphalt binder properties and aboratory mixture rutting resistance. This indicates that the current Superpave® asphalt binder specification and testing protocols are valid. The Federal Highway Administration will test additional mixtures to verify these findings. This report will be of interest to highway personnel who use polymer-modified asphalt binders and Superpave.
www.tfhrc.gov/pavement/asphalt/pavepubs/02042/
Validation of the Superpave Asphalt Binder Fatigue Cracking Parameter, G*sin (delta), Using an Accelerated Loading Facility
FHWA-RD-01-093
This report present information about an accelerated loading facility (ALF) used to validate the Superpave® asphalt binder parameter for fatigue cracking, G*sin (delta). The ALF is a full-scale pavement testing machine that applies one-half of a single rear truck axle load. The speed of the ALF and the applied load were constant in this study.
PDC Phone: 301-577-0818, Fax: 301-577-1421, report.center@fhwa.dot.gov