复合改性排水式沥青混合料性能研究

Study on Performance of Composite Modified Drainage Asphalt Mixture

【目的】为提升开级配OGFC排水式沥青路面的使用年限,减小对进口高黏沥青的依赖。【方法】本研究选用氧化石墨烯及竹纤维对沥青开展复合改性,并进行沥青胶浆性能及混合料路用性能研究,分析复合改性沥青替代TPS高黏沥青的可能性。【结果】试验结果表明,竹纤维的最佳掺量为0.3%;氧化石墨烯及竹纤维的掺入均能改善OGFC-13混合料的高温抗车辙、低温抗开裂及抗水损害能力。【结论】氧化石墨烯及竹纤维能够改善沥青胶浆及沥青混合料的性能,具有替代TPS高黏沥青的能力。

[Purposes]To enhance the service life of OGFC drainage asphalt pavement with open grading and reduce dependence on imported high viscosity asphalt.[Methods]In this study,graphite oxide and bamboo fiber are selected to carry out composite modification of asphalt,and the performance of asphalt mortar and pavement performance of mixture are studied to analyze the possibility of composite modified asphalt replacing TPS high viscosity asphalt.[Findings]The experimental results show that the optimal dosage of bamboo fiber is 0.3%;The addition of Graphene Oxide and bamboo fibers can improve the high-temperature resistance to rutting,low-temperature resistance to cracking,and water damage of OGFC-13 mixture.[Conclusions]GO and bamboo fiber can improve the performance of asphalt mortar and asphalt mixture,and have the ability to replace TPS high viscosity asphalt.