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DIVISION 2:  SITE CONSTRUCTION

SECTION 02747 ‑ ROAD MIX BITUMINOUS PAVEMENT

USE:	Furnishing and placing an asphalt surface treatment.

NOTES TO SPECIFIER:

	A.	Options within paragraphs are identified by enclosure in brackets; blank spaces enclosed by brackets [      ] provide for information to be inserted, as appropriate to individual projects.

B.	TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES, the specifier must edit (delete, substitute or add to the text).  The remaining paragraphs must be renumbered.

C.	DELETE FOR FINAL COPY: Notes to the Specifier, located between lines of asterisks; all [brackets], underlining, boldface, and italics within the paragraphs; and this page.  (Open Reveal Codes [alt F3] to do this accurately).

D.	To Edit “(Footer B)”: (Corel 8).  ENTIRE FOOTER SHOULD BE BOLDED.  Click in the footer and delete the “Project Name (ftr B)” text and replace it with the Name Of The Project (upper/lower case).  Replace date with current MM/YY (WITHOUT BRACKETS). 

E.	The Guide Specifications are intended to be continuously reviewed and revised.  User’s technical comments are appreciated.  Also, other related or similar specifications that are written “from scratch” that could benefit others, or other questions can be sent to NSTC A/E Group, ST-110 or call (303) 987-6868.

DRAWING DATA REQUIRED:

REVISIONS OF THIS SECTION:
CSI format, editorial changes 11/00
Metric: Not Applicable
Technical Update: 

SECTION 02747

ROAD MIX BITUMINOUS PAVEMENT

PART 1  GENERAL

.1	ab1SUMMARY

A.	abSection Includes:  Furnishing and placing [single] [double] [triple] [bituminous surface treatments] [penetration macadam] [seal coats].

B.	abRelated Sections:

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LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED UNDER THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION.  THIS ARTICLE IS RARELY REQUIRED.
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.2	ab1SUBMITTALS

A.	abGeneral:  Submittals shall be according to [Section 01009 - General Information and Requirements.]  [Section 01330 - Submittal Procedures.] [and] [Section 01331 - Certificates.]

B.	ab	Test Data:  Submit three copies of test data for the bituminous materials to be used on this project.  [Testing shall have been performed by an independent testing laboratory within [[     ] years] [[    ] months] [of submitting the report for approval.]

C.	abCertificates of Conformance:  Submit three copies of written certification from the supplier of the Contractor-furnished bituminous materials to be used on this project that [it conforms] [they conform] to the requirements of this specification section.

D.	abSamples:  Submit three samples of each type of bituminous material to be used on this project.  Samples shall be [          ].

.3	ab1QUALITY ASSURANCE

A.	abFailure Criteria:  Not limited to the following:
1.	abRaveling of surface aggregate.

PART 2:  PRODUCTS

2.1	MATERIALS

A.	Bituminous Material:  Shall be as specified below:
2.	abSurface Treatment:  AASHTO M 208:  CRS‑2
3.	ab		Penetration Macadam:  AASHTO M 208:  CRS‑1
4.	abSeal Coats:  AASHTO M 140:  SS‑1h

B.	abAggregate:  Shall be crushed stone, crushed slag, or crushed or natural gravel.  Only one type of aggregate shall be used on the project unless alternative types are approved in writing by the Contracting Officer.  Aggregates shall meet the quality requirements of ASTM C 131 by not losing more than [20] % of their weight.  When tested according to AASHTO T 182, aggregate shall have a retained bituminous film above 95%.  Aggregates which do not meet this requirement may be used, provided an approved chemical additive or wetting agent is used to provide a water‑resistant film.  When crushed gravel is used, not less than 50% by weight of the particles retained on the No. 4 sieve shall have at least one fractured face.  Aggregates shall meet the following gradation requirements according to AASHTO M 43.

GRADING DESIGNATION					
Sieve	(Percent by Weight Passing Square Mesh Sieves, AASHTO T 27)				
Designation	C(No. 7)	D(No. 8)	E(No. 9)	F(No. 10)	
3/4 inch	100	‑‑	‑‑	‑‑	
1/2 inch	90‑100	100	‑‑	‑‑	
3/8 inch	‑‑	85‑100	100	100	
No. 4	0‑15	‑‑	85‑100	85‑100	
No. 8	‑‑	0‑10	‑‑	‑‑	
No. 200	0‑2	0‑2	0‑2	0‑10	

1.	abBlotter Material:  Shall conform to the gradation requirements of AASHTO M 43, Size No. 10.  The aggregate shall be free from undesirable material.
2.	abFiller Material:  Shall meet the requirements of AASHTO M 17 for bituminous bases.
3.	abAggregate Sieve Limit:  May not exceed the sieve fraction by more than 2%.  Aggregate exceeding this limit may be rejected.

C.	abGovernment‑furnished Material:  [See Section 01019 ‑ Government-Furnished Property.]

PART 3:  EXECUTION

3.1	PREPARATION:

A	General:  Application of bituminous surface treatment shall not proceed until approved in writing by the Contracting Officer.

B.	Surface Conditions:  The surface upon which the bitumen is to be sprayed shall be smooth, clean, and free from loose material.
1.	abAggregate surfaces may require a light application of water to lay down dust and improve absorbency.  Water shall be applied at no additional cost to the Government.
2.	abBituminous material shall be at the proper temperature and viscosity for application.
3.	abBituminous material shall be applied only when the surface to be treated is dry or slightly damp, when the surface is 70 degrees F or more, and when the weather is not foggy or rainy.

3.2	SURFACE APPLICATION

A.	Bitumen Application:  Bitumen for surface treatments shall be uniformly applied at a rate of [0.3] gal/yd2 in a width no more than 6 inches wider than the aggregate laying equipment.  [A test run on paper shall be run to determine correct coverage and application rate.]  Excess bitumen shall be squeegeed from the surface.  Skipped areas or deficiencies shall be corrected.

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IF MULTIPLE TREATMENTS WITH DIFFERENT GRADES OF AGGREGATE ARE REQUIRED, ADDITIONAL PARAGRAPHS SHOULD BE WRITTEN.

SPECIFY THE AGGREGATE APPLICATION RATE AFTER DETERMINING THE BITUMEN TYPE AND AGGREGATE GRADATION TO MEET THE PROJECT REQUIREMENTS.  SELECT THE STRIP WIDTH.
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B.	Aggregate Application:
1.	Pre‑Treatment:  Aggregate shall be [pre‑treated by mixing with water to slightly moisten the aggregate.]  [pre‑coated with 1% asphalt by weight before spreading.]
2.	Spreading:  Shall be spread uniformly at a rate of [35] lb/yd2 for the first coat and [12] lb/yd2 for the second coat.  Where multiple passes are required, a [6] inch strip of asphalt shall be left to start the next pass.

C.	Compaction:  After aggregate application, the material shall be compacted by rubber‑tired or steel‑wheeled [non‑vibrator] rollers not to exceed 8 tons compactive effort.  Compaction shall continue until the aggregate is uniformly keyed into the asphalt.

3.3	FIELD QUALITY CONTROL

A.	Testing:  [The Government will perform the required field testing, recording and distributing of the results.]  [The Government will make arrangements for a certified independent testing laboratory to perform the required testing, recording, and distributing of the results.]  [The Contractor shall conduct the performance and acceptance tests of the [        ].]
[The Contractor shall furnish necessary equipment, labor, and materials to conduct the testing.]  [Testing shall be conducted in the presence of the Contracting Officer who shall be given 48 hours notice before any test is to be conducted.]  [The Contractor shall make arrangements for a certified independent testing laboratory, according to the requirements of Section 01458 - Testing Laboratory Services, to perform the required testing, recording and distributing of the results.]

B.	Test Strips:  The Government will have the option of making test strips once per [mile] or [5,000 ft].  The Contractor shall replace these strips when the test patches have been removed at no additional cost to the Government.

.4	ab3CLEANING:

A.	abRequirements:  The Contractor shall sweep excess aggregate from the surface and haul it away.  Surface treatment that strips away during cleanup shall be replaced by the Contractor.

.5	ab3PROTECTION:

A.	abTraffic Control:  [Traffic shall not be allowed on uncoated asphalt.]  [Traffic shall be allowed on completed work, but is limited to a speed of 10 mph for the first 45 minutes after completion of the work.]  [Traffic regulation shall be according to Section 01500 - Temporary Facilities and Controls.

PART 4:  MEASUREMENT AND PAYMENT

4.1	METHOD OF MEASUREMENT

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WHEN A "LUMP SUM" CONTRACT IS USED, DELETE THE TITLE PART 4:  MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION.  MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01009 -GENERAL INFORMATION AND REQUIREMENTS OR SECTION 01010 - SUMMARY OF WORK.

WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO MEASUREMENT" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE INCLUDED IN THE BID SCHEDULE.
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A.	Units:  The work described in this section will [not be measured for payment.]  [be measured and paid for] [on a lump sum basis.] [by the square yard.] [by the mile.] [by the station.]  [by the amount of material used, gallons for asphalt and tons for aggregate.]  [The material shall be measured using certified meter or scale receipts.  The Contractor shall supply these receipts at no additional cost to the Government.]

4.2	BASIS OF PAYMENT

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WHEN NOT A "LUMP SUM" CONTRACT, SELECT APPLICABLE PHRASES; USE THE "NO DIRECT PAYMENT" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE INCLUDED IN THE BID SCHEDULE.

WHEN NOT A "LUMP SUM" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS SECTION, SELECT APPLICABLE PAY ITEMS.  DO NOT CHANGE PAY ITEM NUMBER.  WHEN MORE THAN ONE GRADE OF ASPHALT IS SPECIFIED FOR ANY PAY ITEM, LETTER SUFFIXES WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.  WHEN GOVERNMENT-FURNISHED PROPERTY IS SPECIFIED FOR PAY ITEMS, THE LETTER SUFFIX GF WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.
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A.	Payment:  [No direct payment for the work described under this section will be made.  Consideration for this item shall be included in the bid price for other items of the Contract.]  [Prices and payment will be full compensation for the work described in this section.  Payment will be made under:]

Pay Item		Pay Unit

02747(01)	Asphalt Surface Treatment	Lump Sum
02747(02)	Asphalt Surface Treatment	Square Yard
02747(03)	Asphalt Surface Treatment	Mile
02747(04)	Asphalt Surface Treatment	Station
02747(10)	Asphalt, Liquid	Gallon
02747(20)	Aggregate for Asphalt Surface Treatment	Ton

END OF SECTION