稳定型橡胶塑料改性沥青混合料动态模量研究  

Dynamic modulus research o stabilized rubber and plastic modified asphalt mixtures

作　　者：任瑞波[1] 耿立涛[1] 孙继展 刘占斌[1] 

机构地区：[1]山东建筑大学交通工程学院,山东济南250101

出　　处：《山东建筑大学学报》2016年第4期307-313,335,共8页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51278288);山东省高校科技计划项目(J16LG61)

摘　　要：稳定型橡胶塑料改性沥青作为一种废旧高分子改性沥青,在改善路用性能的同时兼具废料利用的环保需求,沥青混合料动态模量作为一种重要的力学参数对分析混合料性能具有指导意义。文章设计了稳定型橡胶塑料改性沥青混合料,基于动态模量试验分析稳定型橡胶塑料改性沥青混合料的动态力学特性,建立了动态模量主曲线评价其力学性能,并通过Levenberg-Marquardt非线性回归方法获得了用于预估稳定型橡胶塑料改性沥青混合料动态模量的修正Witczak预估模型。结果表明:与SBS改性沥青混合料相比,稳定型橡胶塑料改性沥青混合料低温抗拉强度提高15%,高温动态模量提高超过40%,其动态模量可以利用修正后的Witczak模型实现较为精确的预估。Stabilized rubber and plastic modified asphalt （RPMA） as a waste polymer modified asphalt, have both improved road performance and environmental needs of recycling waste materials. Asphalt mixture dynamicmodulus as an important guiding significance for the mechanical parameters mixture performance analysis. The paper designed RPMA mixture, based on dynamic modulus test and analyze the dynamic mechanical characteristics of PRMA mixture, and create a dynamic modulus master curve for the performance evaluation of the RMPA mixture. Moreover, a revised Witczak model for dynamic modulus prediction of RPMA mixtures was constructed based on the Levenberg-Marquardt nonlinear regression method. Results show RPMA mixtures dynamic modulus compared to SBS mixture has more than 15% of the tensile modulus of the advantages of low temperature difference of no more than 0.7%. High temperature dynamic modulus increase more than 40% exhibit excellent mechanical performance, dynamic modulus master curve further shows its performance advantage, and the dynamic modulus of RPMA can be predicted well with the revised Witczak model proposed in this study.

关 键 词：稳定型橡胶塑料改性沥青混合料 动态力学特性 主曲线 修正Witczak预估模型 

分 类 号：U414[交通运输工程—道路与铁道工程]