Standard Method of Test for Multiple Stress Creep Recovery (MSCR) Test of Asphalt Binder Using a Dynamic Shear Rheometer (DSR)
This test method covers the determination of percent recovery and nonrecoverable creep compliance of asphalt binders by means of the Multiple Stress Creep Recovery (MSCR) test. The MSCR test is conducted using the Dynamic Shear Rheometer (DSR) at a specified temperature. It is intended for use with residue from T 240 (Rolling Thin-Film Oven Test (RTFOT)), but asphalt binder residue may also include emulsified asphalt residue from T 59 (distillation or oven evaporation) or R 78 (low-temp evaporation). In the case of emulsified asphalt residue, the residue recovery procedure from T 59 (distillation or oven evaporation) or R 78 (low-temp evaporation) simulate the field condition of the emulsified asphalt residue immediately after the pavement is constructed, eliminating the need for conditioning according to T 240 (RTFOT). The percent recovery value is intended to provide a means for determining the elastic response and stress dependence of polymer modified and unmodified asphalt binders.
