The purpose of the reflection crack relief interlayer (RCRI) is to retard reflection cracks on asphalt concrete overlays located on top of jointed concrete pavements.

The RCRI is a fine mix that is designed for cracking resistance using the flexural beam fatigue test. The mix is typically placed 1-in. thick and should be covered with an adequate overlay thickness to provide adequate resistance to rutting.

An alternate option is the crack attenuating mix (CAM). The cracking resistance of the CAM will be evaluated using the overlay tester.