AH-1温拌剂对SBS改性沥青路用性能的影响

Effect of AH-1 Warm Mixing Agent on Pavement Performance of SBS Modified Asphalt

为了研究与比较自行研发的AH-1温拌剂对SBS改性沥青路用性能的影响,对比不同掺量的AH-1与Sasobit的路用性能差异,应用常规的沥青性能试验对针入度、延度和软化点进行测试,通过沥青旋转黏度试验和变温击实马歇尔试验确定最佳成型温度,根据规范对SMA-13型混合料按照最佳拌合及成型温度制作马歇尔试件,测定各项指标。结果显示:掺入AH-1和Sasobit均增加了SBS改性沥青的软化点,减小了延度和针入度;4%的AH-1比普通热拌沥青混合料的拌合温度降低25℃,且降温效果比Sasobit要好;AH-1增加了沥青混合料的高温性能,降低了混合料的低温和水稳性能,但仍然满足规范要求。

In order to study and compare the effect of self-developed AH-1 warm mixing agent on the pavement performance of SBS modified asphalt,and to compare the pavement performance differences between AH-1 and Sasobit with the different dosage,the penetration,ductility and softening point of asphalt are tested by the conventional asphalt performance test.The optimal forming temperature is determined through the asphalt rotary viscosity test and variable temperature compaction Marshall Test.Based on the specification,the Marshall specimen is made for the SMA-13 mixture according to the optimal mixing and forming temperature to detect various indexes.The results show that the addition of AH-1 and Sasobit can increase the softening point and reduce the ductility and penetration of SBS modified asphalt.The mixing temperature of 4% AH-1 is 250 C lower than that of ordinary hot mix asphalt mixture,and the cooling effect is better than that of Sasobit.AH-1 increases the high temperature performance of asphalt mixture and reduces the low temperature and water stability of mixture,but still meets the standard requirements.