纳米材料复合塑料改性沥青抗老化性能及其混合料路用性能研究  

Study on Anti Aging Performance of Nano Material Composite Plastic Modified Asphalt and Pavement Performance of Its Mixture

作　　者：彭勃 唐小富 PENG Bo;TANG Xiaofu(Hunan Expressway Group Co.,Ltd.,Changsha,Hunan 410000,China)

机构地区：[1]湖南省高速公路集团有限公司,湖南长沙410000

出　　处：《公路工程》2025年第1期214-220,共7页Highway Engineering

基　　金：湖南省交通厅科技项目(201807)。

摘　　要：为了拓宽废弃塑料在沥青路面领域的应用,采用多种纳米材料对废弃塑料改性沥青进行“二次改性”,并将其制备成沥青混合料。通过物理性能试验和流变试验老化指数分析了复合改性沥青的抗老化性能,采用车辙试验、三点弯曲试验、浸水马歇尔试验和疲劳试验等方法研究了复合改性沥青混合料的路用性能。结果表明:多种纳米材料对废弃塑料改性沥青的热氧老化性能提升效果不明显,大幅度增强了沥青的抗紫外老化能力,其中提升效果顺序分别为纳米ZnO>纳米TiO_(2)>纳米SiO_(2)。纳米材料对于废弃塑料改性沥青混合料的高温抗车辙性能和疲劳性能提升效果明显,其中高温性能纳米ZnO表现最佳,疲劳性能纳米TiO_(2)表现最佳;纳米材料弥补了废弃塑料改性沥青混合料低温抗裂性不足的局限性,并对水稳定性也有小幅度的提升效果。综合来看,纳米ZnO/废弃塑料复合改性沥青混合料更能够适应复杂的服役条件。In order to broaden the application of waste plastics in the field of asphalt pavement,this paper uses a variety of nanomaterials to"re-modify"waste plastic modified asphalt and prepare it into asphalt mixture.The anti-aging performance of composite modified asphalt was analyzed by physical property test and rheological test aging index.The road performance of composite modified asphalt mixture was studied by rutting test,three-point bending test,immersion Marshall test and fatigue test.The results show that the improvement effect of various nanomaterials on the thermal-oxidative aging performance of waste plastic modified asphalt is not obvious,and the anti-ultraviolet aging ability of asphalt is greatly enhanced.The order of improvement effect is nano-ZnO>nano-TiO_(2)>nano-SiO_(2).Nanomaterials have obvious effect on the high temperature rutting resistance and fatigue performance of waste plastic modified asphalt mixture,and among them,the high temperature performance of nano-ZnO is the best,and the fatigue performance of nano-TiO_(2) is the best.Nanomaterials make up for the limitations of low temperature crack resistance of waste plastic modified modified asphalt mixture,and have a small improvement effect on water stability.On the whole,nano-ZnO/waste plastic composite modified asphalt mixture can be applied to complex service conditions.

关 键 词：道路工程 改性沥青 纳米材料 废弃塑料 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]