【摘要】 选用4种纳米材料与青川岩沥青结合,对基质沥青进行复合改性,通过沥青试验及混合料试验研究复合改性沥青的性能。沥青试验包括3大指标试验、旋转黏度试验、动态剪切流变试验、弯曲蠕变试验及旋转薄膜烘烤箱试验,沥青混合料试验包含车辙试验、浸航油稳定性试验、浸水稳定性试验和冻融劈裂试验等。沥青试验结果显示:与基质沥青及岩沥青改性沥青相比,复合改性沥青的针入度降低,低温延度下降,软化点和稠度提升,高温稳定性和抗老化性得到改善,但低温性能会有一定程度下降。混合料试验表明:岩沥青和纳米材料的加入使得混合料具有更高的抗车辙能力,抗水损害和抗航油侵蚀性能也得到提升。研究结果表明这种新型的复合改性沥青适应于非极端寒冷地区机场道面面层。更多还原

【Abstract】 This paper evaluates the properties of composite modified asphalt by selecting four kinds of nano?materials combined with composite modified the base bitumen with QingChuan rock asphalt.Asphalt experiments contain the three major indexes,rotational viscosity test,dynamic shear rheological test and bending beam rhememer test and rotating film drying oven test,and asphalt mixture tests include rutting test,oil immersion stability test,water immersion stability test and freeze-thaw splitting test.Compared with base bitumen and rock asphalt,the penetration and ductility of composite modified asphalt reduce while softening point increases.Nano-materials and rock asphalt can significantly improve the consistency of asphalt,high temperature performance as well as anti ageing property.But low temperature properties have adverse effects.The mixture test shows that the addition of rock asphalt and nano materials can improve the anti-rutting ability,anti water damage and anti erosion performance of aviation kerosene.The study shows that the composite modified asphalt meets the requirements of the technical indicators of airport pavement.更多还原