摘要
采用 90#基质沥青及 3 种不同结构的SBS共聚物混合制备SBS改性沥青,并进行了针入度、软化点、延度、黏度、荧光显微和流变性能测试.通过30～80℃温度扫描实验,分析了SBS改性沥青的复数剪切模量、相位角、车辙因子.结果表明,SBS空间网络结构在SBS掺量较少时无法体现出来,增加SBS的掺量和SBS的分子质量,可以提高改性沥青的高温稳定性、低温抗拉性、黏性、抗车辙性,降低温度敏感性;SBS的掺量增加至5%时,SBS在沥青中的结构更为密集,分布更为均匀.
Abstract
SBS-modified asphalt was prepared by blending 90#base asphalt,three SBS copolymers with different structures,and tested for needle penetration,softening point,ductility,viscosity,fluorescence microscopy and rheological properties.The complex shear modulus,phase angle,and rutting factor of SBS-modified asphalt were analyzed by temperature sweep experiments from 30～80℃.The results showed that the SBS spatial network structure could not be reflected when the SBS doping was low,and increasing the doping of SBS and the molecular mass of SBS could improve the high temperature stability,low temperature tensile strength,viscosity,rutting resistance,and reduce temperature sensitivity of the modified asphalt.In addition,the fluorescence microscopy results show that when the dosage of SBS is increased to 5%,the structure of SBS in asphalt is more dense and uniformly distributed.
基金项目
新疆维吾尔自治区青年科学基金项目(2023D01C194)
新疆维吾尔自治区天池博士计划(TCBS20211)
维普
万方数据