Lab Simulation of Reflective Cracking By Load

摘要

On reference to many lab simulations of reflective cracking, the simulation of reflective cracking by load was carried out in lab with the Hamburg wheel tracking test which was more reasonable than other fatigue tests because the load applied was similar to the actual situation. Four types of stress absorbing interlayer, including SBS modified asphalt sand interlayer, asphalt-rubber sand interlayer, fiberglass-polyester paving mat interlayer and SAMI(Stress absorbing membrane interlayer )were tested. Also tested was the specimen without any interlays to serve as a control. The paper introduced the material properties and gradations of five different specimens and the fatigue test employed cyclic round moving load on different stress absorbing interlayer specimens (including the specimens without interlayer) to asses their abilities to retard the development of reflective cracking by load. Finally, the paper built corresponding finite element models to analyze the test results.