PE和SBS复合改性沥青混合料路用性能
来源期刊：中南大学学报(自然科学版)2012年第10期
论文作者：杨朋 张肖宁
文章页码：4044 - 4049
关键词：聚乙烯(PE)；聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物(SBS)；高模量沥青混合料；路用性能
Key words：polyethylene; styrene-butadiene-styrene (SBS); high modulus asphalt mixture; pavement performance
摘 要：以AH-70号沥青作为基质沥青，选用聚乙烯(PE)添加剂和聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物(SBS)作为改性剂制备高模量沥青和高模量沥青混合料，通过车辙试验、动态蠕变试验、浸水马歇尔试验和低温小梁弯曲试验等室内试验，测试和评价沥青混合料的路用性能，并分析PE和SBS改性剂对混合料性能的影响。研究结果表明：PE和SBS复合改性后，沥青混合料的高温性能、力学性能和抗水损害能力有较大提高，而低温性能和抗疲劳性能有所降低；随着SBS和PE掺加量的增加，其对混合料路用性能的影响逐渐减弱，在实际应用中，PE和SBS适宜的总掺加量质量分数为10.0%(5.5% PE +4.5% SBS)。
Abstract: Taking AH-70 asphalt as base asphalt, the modified asphalt mixture was prepared by polyethylene (PE) and styrene-butadiene-styrene (SBS). The high modulus asphalt mixture and its physical change were studied according to wheel rutting test, the dynamic creep test, the immersion Marshall test, the freeze-thaw splitting test and the bending test of small beam sample. The results show that the high temperature performance, the mechanical performance, and the water stability of high modulus asphalt mixtures are improved, and the low temperature performance and the anti-fatigue performance are declined slightly. There is no evident effect when the mixing amount of SBS and PE is larger than 10.0% and therefore the suitable mixing amount is 10.0%.
杨朋，张肖宁
(华南理工大学 土木与交通学院，广东 广州，510641)
摘 要：以AH-70号沥青作为基质沥青，选用聚乙烯(PE)添加剂和聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物(SBS)作为改性剂制备高模量沥青和高模量沥青混合料，通过车辙试验、动态蠕变试验、浸水马歇尔试验和低温小梁弯曲试验等室内试验，测试和评价沥青混合料的路用性能，并分析PE和SBS改性剂对混合料性能的影响。研究结果表明：PE和SBS复合改性后，沥青混合料的高温性能、力学性能和抗水损害能力有较大提高，而低温性能和抗疲劳性能有所降低；随着SBS和PE掺加量的增加，其对混合料路用性能的影响逐渐减弱，在实际应用中，PE和SBS适宜的总掺加量质量分数为10.0%(5.5% PE +4.5% SBS)。
关键词：聚乙烯(PE)；聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物(SBS)；高模量沥青混合料；路用性能
YANG Peng, ZHANG Xiao-ning
(School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)
Abstract:Taking AH-70 asphalt as base asphalt, the modified asphalt mixture was prepared by polyethylene (PE) and styrene-butadiene-styrene (SBS). The high modulus asphalt mixture and its physical change were studied according to wheel rutting test, the dynamic creep test, the immersion Marshall test, the freeze-thaw splitting test and the bending test of small beam sample. The results show that the high temperature performance, the mechanical performance, and the water stability of high modulus asphalt mixtures are improved, and the low temperature performance and the anti-fatigue performance are declined slightly. There is no evident effect when the mixing amount of SBS and PE is larger than 10.0% and therefore the suitable mixing amount is 10.0%.
Key words:polyethylene; styrene-butadiene-styrene (SBS); high modulus asphalt mixture; pavement performance
