TRIS Online Record

Printable View

Title	GTM METHODS OF TEST FOR SOILS AND BITUMINOUS MIXTURES
Accession No	00229118
Authors	McRae, J L
Corp. Authors / Publisher	Engineering Developments Company Inc
Abstract	THE FOLLOWING PHYSICAL PROPERTIES ARE DETERMINED OF ANY PROPOSED AGGREGATE BLEND FOR USE IN THE FLEXIBLE PAVEMENT TO CARRY ANY SPECIFIED WHEEL LOAD: OPTIMUM BITUMEN CONTENT, REQUIRED DENSITY, AND BEARING RESISTANCE. THE GYRATORY TESTING MACHINE IS DESCRIBED AS THE PRIMARY APPARATUS REQUIRED FOR THIS TEST. THE GYRATORY TESTING MACHINE USAGE IS DESCRIBED AS A TEST FOR THE COMPACTION METHOD WHICH IS INTENDED TO PROVIDE RATIONAL COMPACTION REQUIREMENTS FOR FLEXIBLE PAVEMENTS. THE FLEXIBLE PAVEMENT THICKNESS DESIGN TEST IS BASED ON THE PREMISE THAT NO PART OF THE PAVEMENT BASE OR SUBGRADE SHOULD EXPERIENCE A MAXIMUM THEORETICAL SHEAR STRESS THAT IS IN EXCESS OF THE SHEARING STRENGTH AS MEASURED BY THE GYRATORY TESTING MACHINE. THE THEORETICALLY INDUCED MAXIMUM SHEAR STRESS AND THE MEASURED SHEAR STRENGTH ARE PLOTTED VERSES DEPTH BENEATH THE WHEEL CONTACT AREA. IT IS EMPHASIZED THAT THE MAGNITUDE OF THE MEASURED STRENGTH WILL VARY WITH THE AMOUNT OF STRAIN (GYRATORY ANGLE) AND THE SELECTION OF THIS VALUE MUST BE BASED ON ENGINEERING JUDGMENT TAKING INTO CONSIDERATION ENVIRONMENTAL AND STRUCTURAL FEATURES AS WELL AS ANTICIPATED INTENSITY OF TRAFFIC AND DEFLECTION OF THE PAVEMENT.
Supplemental Information	pp 1-27, 20 FIG
TRT Terms	Bearing capacity ; Bitumen ; Bituminous mixtures ; Blending ; Compaction ; Deflection ; Density ; Flexible pavements ; Gyratory testing machines ; Pavement design ; Pavements ; Shear strength ; Shear stress ; Soil tests ; Thickness ; Traffic density ; Wheel loads
Other Terms	Aggregate blending; Bitumen content; Compaction requirements; Flexible pavement design; Gyratory tests; Pavement deflection; Thickness design
Subject Areas	H31 BITUMINOUS MATERIALS AND MIXES; H61 EXPLORATION - CLASSIFICATION (SOILS); H62 FOUNDATIONS (SOILS)
TRIS Files	HRIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.