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采用室内紫外试验箱模拟室外紫外照射条件,对温拌橡胶沥青进行紫外老化。通过黏度试验、动态剪切流变试验、延度试验、弯曲梁流变试验分别对温拌橡胶沥青的高温性能、低温性能和温度敏感性进行研究,分析紫外老化对温拌橡胶沥青流变性能的影响。结果表明:紫外老化使得温拌橡胶沥青的黏度、车辙因子和临界温度增大,高温性能得到改善;在紫外老化180h后,临界温度较老化前增幅最大,为6.57%;紫外老化后温拌橡胶沥青的延度值逐渐降低,蠕变劲度S值逐渐增大,m值减小,低温抗裂性能逐渐变差,同时紫外老化也使温拌橡胶沥青的温度敏感性能降低;在紫外老化180h后,由黏温曲线所得的m值减小幅度最大,为15.89%。
The indoor UV chamber was used to simulate the outdoor UV irradiation conditions and the UV aging of the warm mix asphalt was carried out. The high temperature performance, low temperature performance and temperature sensitivity of warm mix rubber asphalt were studied respectively by viscosity test, dynamic shear rheological test, ductility test and bending beam rheological test. The effects of UV aging on the rheological properties of warm mix asphalt Impact. The results show that the UV aging makes the viscosity, rutting factor and critical temperature of warm mix asphalt increase, while the high temperature performance improves. After 180h ultraviolet curing, the critical temperature increases by 6.57% The ductility value of asphalt gradually decreased, the creep stiffness S value increased gradually, the value of m decreased, the anti-cracking performance at low temperature gradually deteriorated, and the UV sensitivity also reduced the temperature sensitivity of warm mix rubber asphalt. , The value of m obtained from the viscosity-temperature curve decreases the most, which is 15.89%.