Abstract
In order to investigate the influence of calcium sulfate whisker (CSW) on the high temperature performance of asphalt binder, two types of CSW, calcium sulfate hemihydrates whisker (HCSW) and calcium sulfate anhydrous whisker (ACSW), were used. The rheological properties and thermal stability performance of CSW modified asphalt were studied using Dynamic shear rheomter (DSR) and Thermogravimetric (TG). The results show that two CSWs can enhance the rutting resistance but weaken the temperature sensitivity of asphalt binder. The effect of ACSW on the high rheological properties is more significantly than that of HCSW. In addition, the thermal stability performance of ACSW modified asphalt is better than that of HCSW modified asphalt.
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