【摘 要】
：
为了提高沥青及其混合料的性能,将2种废旧聚丙烯(white polypropylene,WPP;green polypropylene,GPP)分别与丁苯橡胶(styrene butadiene rubber,SBR)复配掺入基质沥青中,对改性沥青进行沥青常规性能试验和高温流变性能试验,并通过高温车辙试验、低温弯曲试验、浸水马歇尔试验以及冻融劈裂试验,与苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene butadiene styrene block copolymer,SBS)沥青混合料对比分析改性沥青混
【机 构】
：
东北林业大学土木工程学院,黑龙江哈尔滨150040
论文部分内容阅读
为了提高沥青及其混合料的性能,将2种废旧聚丙烯(white polypropylene,WPP;green polypropylene,GPP)分别与丁苯橡胶(styrene butadiene rubber,SBR)复配掺入基质沥青中,对改性沥青进行沥青常规性能试验和高温流变性能试验,并通过高温车辙试验、低温弯曲试验、浸水马歇尔试验以及冻融劈裂试验,与苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene butadiene styrene block copolymer,SBS)沥青混合料对比分析改性沥青混合料的路用性能.研究结果表明:聚丙烯/丁苯橡胶(polypropylene/styrene butadiene rubber,PP/SBR)复合改性剂的加入提高了沥青的软化点、黏度、延度以及性能等级(peformance grade,PG高温等级),降低了针入度,改性沥青的高温性能与和易性明显提高,低温性能有小幅度改善,PP/SBR复合改性沥青混合料兼顾了PP沥青混合料优异的高温稳定性、水稳定性以及SBR沥青混合料的低温抗裂性,且GPP/SBR沥青混合料的高温性能要优于SBS沥青混合料.废旧PP复配SBR沥青混合料路用性能优异,具有一定的研究意义和良好的环保效应.
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