基于掺加聚酯纤维的沥青混合料对比试验研究

Experiment Study on the Polyester Fiber Mix into Asphalt Mixture

摘要: 文章对相同配合比的基质沥青、掺加4.5%SBS改性剂和同时掺加0.25%聚酯纤维与4.5%SBS改性剂的混合料分别进行了马歇尔稳定度试验、车辙试验、劈裂试验、残留稳定度和冻融劈裂试验，研究三种沥青混合料的马歇尔稳定度、水稳定性、高温稳定性及低温抗裂性。结果表明：掺加SBS改性剂和聚酯纤维后，沥青混合料的高温稳定性能得到改善。抗车辙能力和低温性能优劣依次为掺加聚酯纤维和SBS改性沥青混合料、SBS改性沥青混合料、基质沥青混合料。残留稳定度和冻融劈裂强度比的优劣顺序为：纤维沥青混合料、SBS改性沥青混合料、基质沥青混合料。

Abstract: The paper analyzes three kinds of asphalt mixture with the same gradation mixture of matrix asphalt, adding 4.5% SBS modified mixes agent and simultaneously adding 0.25% polyester fiber and 4.5% SBS modifier. The three kinds of mixture are conducted by Marshall stability test, rutting test, split test, residual stability and freeze-thaw splitting test, aiming to properties of mixture Marshall stability, water stability, high temperature stability and low temperature crack resistance. The results show that the high temperature stability, asphalt mixture rutting resistance and low temperature properties of asphalt mixture can be improved by the addition of the SBS modifier and polyester fiber. Asphalt mixture with polyester fiber and SBS modifier is better than that of SBS modified asphalt and asphalt mixture in the aspects of rutting resistance, low temperature performance, water stability and freeze-thaw splitting strength ratio.