EVALUATION OF RUBBER-ASPHALT BINDER FOR SEAL COATING ASPHALTIC CONCRETE
The results are presented of inspection and evaluation of the application of seal coats with rubber asphalt binder (ground-up rubber tires mixed with paving grade asphalt cement) at 3 Naval air stations. The inspections consisted of making detailed crack surveys in selected sample areas prior to application of the rubber-asphalt coat; inspecting these same areas after the seal coat application; plotting reflected cracks; and photographing pavement conditions. The effectiveness of the binder was evaluated by determining the amount of reflective cracking appearing on the surface; determining the aggregate retention characteristics; and surveying existing literature regarding durability of the rubber-asphalt binder. The results showed that: the rubber-asphalt seal is at least as effective as 2 inches of asphaltic concrete in preventing reflection cracks over fatigue- type cracks; shrinkage cracks reflect before fatigue cracks and wide shrinkage cracks will reflect almost completely within one year after sealing; the rubber-asphalt binder does not relieve the problem of loose aggregate; chip seal coats with rubber-asphalt binder can provide excellent skid resistance; the rubber-asphalt seal coat is 20 percent cheaper than a 2-inch asphaltic concrete overlay; narrow, reflected fatigue cracks tend to be self-healing in hot weather.
- Sponsored by Western Division, Naval Facilities Engineering Command.
Naval Civil Engineering LaboratoryPort Hueneme California 93041
, United States
- Brownie, R B
- Publication Date: 1976-8
- Features: Figures; Tables;
- Pagination: 29 p.
- TRT Terms: Asphalt; Binders; Reflection cracking; Rubber; Seal coats; Skid resistance; Tires
- Subject Areas: Highways; Materials; Vehicles and Equipment;
- Accession Number: 00145010
- Record Type: Publication
- Report/Paper Numbers: M-53-76-5
- Files: TRIS
- Created Date: Feb 1 1977 12:00AM