Indirect Tensile Strength of Concrete Containing Reclaimed Asphalt Pavement Using the Superpave Indirect Tensile Test

Abstract

Concrete mixes containing Reclaimed Asphalt Pavement (RAP) were evaluated by the Superpave® Indirect Tensile (IDT) strength test using a constant force-control and a displacement-control rate. The IDT strength of concrete without RAP at early age was seen to increase as the temperature decreased. The effect of temperature was not seen among the concrete at later ages. In addition, the IDT strength of concrete containing RAP was seen to decrease as the percentage of RAP and temperature increased. The IDT strength computed from the maximum load at 28 days curing time was found to correlate well with the splitting tensile strength.