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选择不同形状和尺寸的纳米有机膨润土、纳米SiO2及苯乙烯–丁二烯共聚物(SBS)为改性剂,研究其对基质沥青的改性作用。针对各改性剂不同的结构属性确定了相应的改性沥青制备工艺。通过针入度、软化点、延度和Brookfield黏度等路用性能常规指标以及车辙因子、零剪切黏度、弯曲蠕变劲度等非常规试验指标评价了纳米层状硅酸盐改性沥青和复合材料改性沥青的路用性能。结果表明这些纳米材料改性沥青的路用性能得到了显著改善。
Nano-organobentonites with different shapes and sizes, nano-SiO2 and styrene-butadiene copolymer (SBS) were selected as modifiers to study the modification of matrix asphalt. According to the different structural properties of each modifier, the corresponding modified asphalt preparation process was determined. Through the conventional index of road performance, such as penetration, softening point, ductility and Brookfield viscosity, as well as the rutting factor, zero-shear viscosity, flexural creep stiffness and other unconventional experimental indexes, Road performance of composite modified asphalt. The results show that these nano-materials modified asphalt road performance has been significantly improved.