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在进行4种沥青胶结料基本性能试验基础上,确定了Sasobit外掺剂的最佳掺量为3%。运用3大指标、PG分级、表观粘度试验对比研究了几种沥青胶结料的性能指标,并铺筑试验路段证明室内研究成果的可靠性。结果表明,沥青胶结料加入3%Sasobit后,高温抗变形能力增强,低温性能基本不变;沥青胶结料的粘温曲线存在一分界温度,大于此温度粘度降低,反之升高。
On the basis of the basic performance tests of four kinds of asphalt binder, the optimal content of Sasobit external additive was determined to be 3%. The performance indexes of several kinds of asphalt cement were compared with three indexes, PG grade and apparent viscosity test, and the test sections were paved to prove the reliability of indoor research results. The results show that asphalt binder with 3% Sasobit increases the high temperature deformation resistance and low temperature performance. The viscosity-temperature curve of asphalt binder has a demarcation temperature, and the viscosity of asphalt binder decreases and conversely increases.