Evaluation of asphalt-rubber interlayers. (Revised). Final research report, September 1986-September 1992
The report presents the field performance results of three asphalt-rubber interlayer test roads in terms of the effectiveness of the interlayer at reducing the rate of reflection cracking. Several variables were included in the field experiments: concentration of rubber, binder application rate, type or source of rubber, and digestion (or mixing) time of asphalt and rubber. Control sections were made up of no interlayer and interlayer binders of polymer-modified asphalt and conventional asphalt cement. Results of the statistical analyses of the data indicated that, in general, asphalt-rubber interlayers are more effective at reducing reflection cracking than no interlayer at all. Asphalt-rubber also peerformed better than control sections composed of asphalt cement interlayers and polymer-modified interlayers except in one case where the interlyaer was composed of a double application of asphalt cement/aggregate. The data also indicated that higher binder application rates lead to imnproved cracking resistance; however, on many test sections, excessively high binder application rates caused flushing at the pavement surface.
- Research Organization:
- Texas A and M Univ., College Station, TX (United States). Texas Transportation Inst.
- OSTI ID:
- 128237
- Report Number(s):
- PB-95-275707/XAB; TTI-1-10-77-187.4; TRN: 53032570
- Resource Relation:
- Other Information: DN: Also pub. as Texas Transportation Inst., College Station rept. No. RR-187-20; PBD: Feb 1994
- Country of Publication:
- United States
- Language:
- English
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