Sasobit对高模量沥青混合料压实特性和路用性能的影响

发布时间：2018-05-27 21:34

本文选题：路面工程 + 温拌高模量沥青混合料　；参考：《公路工程》2017年02期

【摘要】：高模量沥青混合料由于具有较好的高低温性能而被广泛使用,但在拌合过程中需要将沥青和集料加热至很高的温度,对施工和环境保护带来极大挑战,为改善高模量沥青混合料的压实特性与施工和易性,采用粘温曲线、马歇尔试验、贯入剪切试验、低温弯曲试验、小梁疲劳试验研究了Sasobit掺量对高模量沥青混合料的压实特性以及路用性能的影响。试验结果表明:Sasobit的掺加显著改善了高模量沥青混合料的压实特性,而采用粘温曲线确定温拌高模量沥青混合料的拌合压实温度是不合适的,建议按照"等空隙率法"确定温拌高模量沥青混合料的拌合温度;考虑到温拌高模量沥青混合料的综合路用性能,推荐高模量沥青混合料适宜的Sasobit掺量为1%~2%。
[Abstract]:High modulus asphalt mixture is widely used because of its high and low temperature performance. However, it is necessary to heat asphalt and aggregate to a very high temperature during mixing process, which brings great challenges to construction and environmental protection. In order to improve the compaction characteristics, construction and easiness of high modulus asphalt mixture, the visco-temperature curve, Marshall test, penetration shear test and low temperature bending test were adopted. The influence of Sasobit content on compaction characteristics and road performance of high modulus asphalt mixture was studied by trabecular fatigue test. The experimental results show that the addition of: Sasobit improves the compaction characteristics of high modulus asphalt mixture significantly, but it is not appropriate to determine the compaction temperature of warm mix high modulus asphalt mixture by using the viscosity temperature curve. It is suggested that the mixing temperature of warm mixed high modulus asphalt mixture should be determined according to "equal void ratio method", and considering the comprehensive road performance of warm mix high modulus asphalt mixture, the suitable Sasobit content of high modulus asphalt mixture is recommended to be 1 / 2.
【作者单位】：西安铁路职业技术学院;
【基金】：国家自然基金项目(51378068)
【分类号】：U414

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