摘要
为了研究纳米SiO2对基质沥青混合料路用性能的影响与改善,采用车辙试验、低温弯曲试验、浸水马歇尔试验和冻融劈裂试验分析了纳米SiO2改性沥青混合料的高温稳定性、低温抗裂性和水稳定性,并与基质沥青混合料进行对比验证。在此基础上,采用SPT试验和间接拉伸试验进一步验证了纳米SiO2对沥青混合料高低温性能改善性效果。结果表明:与基质沥青混合料相比,纳米SiO2改性沥青混合料的高温稳定性和水稳定性显著提高,低温性能略有降低,但仍能满足沥青路面对低温抗裂性能的要求。证明了纳米SiO2改性沥青混合料具有优良的路用性能,也证明了其在实际工程应用中的可行性。
In order to study the influence and improvement of Nano-SiO2, on pavement performance of base asphalt mixture, the high-temperature stability, low-temperature crack resistance and water stability of Nano-SiO2 modified asphalt mixture are analyzed by rutting test, low-temperature bending test, immersion Marshall test and freeze-thaw split test, and compared with those of base asphalt mixture. On this basis, the SPT test and indirect tensile test are carried out to further verify the improvement of Nano-SiO2 on high and low temperature performance of asphalt mixture. The results show that （1） compared with base asphalt mixture, the high-temperature stability and water stability of Nano-SiO2 modified asphalt mixture have significantly improved, while the low-temperature performance is reduced slightly, but it still can meet the requirement of the low-temperature crack resistance of asphalt pavement. The test results verified that the pavement performance of Nano-SiO2 modified asphalt mixture is excellent, and it is feasible to be used in practical project.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第8期1-5,共5页
Journal of Highway and Transportation Research and Development
基金
教育部霍英东基金项目(114024)
交通运输部西部交通建设科技项目(0901005C)
美国国家科学基金项目(CMMI-0644552)
江苏省创新学者攀登计划项目(SBK200910046)
江苏省建设厅科技"六大人才"项目(20091210)
