Asphalt additives in thick hot mixed asphalt-concrete pavements. Research report (Interim), Sep 86-Oct 90

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5663316

Button, J W; Prapnnachari, S

Asphalt concrete field test pavements were placed in District 19 north of Texarkana on US-59/71 in 1987 and 1988 to evaluate the ability of certain asphalt additives to enhance resistance to cracking and rutting. Two 10-inch thick and 0.9 mile (approx.) long test pavements and a similar untreated control section were constructed in the northbound and southbound lanes for a total of 6 field trials. Asphalt additives were incorporated in both the 8-inch base and the overlying 2-inch surface layers. The additives evaluated included Goodyear LPF 5812, Chemkrete-CTI 102, Exxon Polybilt 102, and Styrelf 13. Samples of paving materials including aggregates, asphalts, compacted mixes, and pavement cores were collected, conveyed to the laboratory, and tested to provide detailed documentation of their properties. Tests included rheological properties of the binders before and after artificial aging, characterization of aggregate, Hveem and Marshall stability, stiffness as a function of temperature, tensile properties before and after moisture conditioning and artificial aging, air void content, creep, and permanent deformation. Field tests and visual evaluations have been conducted to objectively evaluate field performance. Results of these tests are reported herein. Within 6 months after construction of the base layers and prior to placement of the surface course, the Chemkrete modified base became severely cracked. As a result, the surface mix placed on this base section was treated with Goodyear latex rather than Chemkrete. All other modified pavements and the control section have performed well and exhibited essentially equivalent performance after 2 1/2 years in service.

• Research Organization: Texas A and M Univ., College Station, TX (United States). Texas Transportation Inst.
• OSTI ID: 5663316
• Report Number(s): PB-92-131564/XAB; TTI-1-10-87-187
• Resource Relation: Other Information: See also PB87-233201 and PB89-116966. Sponsored by Federal Highway Administration, Austin, TX. Texas Div., and Texas State Dept. of Highways and Public Transportation, Austin. Transportation Planning Div
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
PAVEMENTS
FIELD TESTS
TEXAS
ROADS
ADDITIVES
AGING
ASPHALTS
BINDERS
CONCRETES
MECHANICAL PROPERTIES
PERFORMANCE TESTING
WEAR
BITUMENS
BUILDING MATERIALS
DEVELOPED COUNTRIES
FEDERAL REGION VI
MATERIALS
NORTH AMERICA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
TESTING
USA
320602* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Public Services- (1980-)