Modifiers for Asphalt Concrete
Final rept. Sep 1987-Apr 1988
RESOURCE INTERNATIONAL INC WESTERVILLE OH
Pagination or Media Count:
In this study, six different types of modifiers belonging to the polymer, elastomer and fillers groups were selected and analyzed. The modifiers were used to develop a screening criteria that are able to distinguish among the modified asphalt concrete mixture performance. The screening criteria contained two major items 1 compatibility and aging, set to ensure that the modifiers are compatible with asphalt cement AC 2 potential candidacy of the modified AC mixture to minimize rutting and fatigue cracking distress. In addition, a cost prohibition factor to exclude modifiers with ineffective life-cycle cost was also considered. Testing methods including Marshall criteria, compressive strength, modulus of resilience and indirect tensile strength were conducted on the modified AC mixtures. Test results could not clearly differentiate between the modified mixtures. Two additional and new testing methods were used 1 the C-line integral method to measure the potential for cracking, and 2 the modified compression creep-rutting method to measure the potential for rutting. Test results were better able to distinguish the performance of the modified AC mixtures as related to cracking and rutting pavement problems.
- Elastomers and Rubber
- Civil Engineering
- Construction Equipment, Materials and Supplies