LABORATORY EVALUATION OF ANTI-REFLECTION CRACKING MATERIALS
This report is concerned with the evaluation of four mixtures of asphalt-rubber to serve as a strain attenuating layer in asphaltic concrete overlays. The four mixtures consisted of two different blends of asphalt-rubber and the strain attenuating layer was made with and without stone chips. The tests used for the evaluation were developed to simulate certain pavement loadings, and they were classified as repeated vertical shear, horizontal shear, repeated horizontal shear, and flexure fatigue. Calculations were carried out to determine the effects of the strain attenuating layer on stress in the laboratory models and also in flexible layered pavement systems. The laboratory test results showed that the layers without the stone chips had the best performance. The calculations for the laboratory and pavement models indicated that the greatest effects brought about by the layer was in reduction of horizontal shear at the overlay-layer interface and that there must be a limiting thickness of the layer to prevent tensile overstress of the bottom surface of the asphaltic concrete overlay. (FHWA)
- Pre=ared in cooperation with The Federal Highway Administration, from a study of anti-reflection cracking materials.
University of Arizona, TucsonTransportation and Traffic Institute
Tucson, AZ United States 85721
Arizona Department of Transportation206 South 17th Avenue
Phoenix, AZ United States 85007
Washington, DC United States 20590
- Jimenez, R A
- MEIER, W R
- Publication Date: 1983-12
- Pagination: 87 p.
- TRT Terms: Asphalt concrete; Laboratory tests; Pavement layers; Prevention; Reflection cracking; Rubberized bitumen; Shear tests; Strain (Mechanics); Thickness
- Uncontrolled Terms: Attenuation
- Old TRIS Terms: Strains
- Subject Areas: Design; Highways; Materials; Pavements; Security and Emergencies; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;
- Accession Number: 00392210
- Record Type: Publication
- Report/Paper Numbers: FHWA-AZ-83-186 Final Rpt.
- Contract Numbers: 1-23(186)
- Files: TRIS, USDOT, STATEDOT
- Created Date: Feb 28 1985 12:00AM