Durability of recycled asphalt pavementusing cementless binders and polymers

摘要

For increased recycling of waste asphalt concrete and reduced generation of CO2, this study evaluated the stability and durability performance of cold-recycled asphalt that used cementless binders and polymers. For cementless binders, the present study used powder added with 80% ground granulated blast furnace slag (BFS) and fly ash, with the optimal mixture ratio derived from prior experiments. According to the test results, as the addition of polymers increased, Marshall stability increased but the flow values decreased. Abrasion resistance and dynamic stability (DS) were superior for specimens that used cementless binders and polymers than for those that used OPC. In particular, at room temperature of 20℃, deflection in the center of the test specimens decreased, and the deformation rate and DS were measured to be 0.0007 mm/min and 63,000 times/min, respectively.