高温裂解高掺量胶粉改性沥青路用性能

董瑞琨; 陈骏; 赵梦珍

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高温裂解高掺量胶粉改性沥青路用性能

首发时间：2020-05-22

董瑞琨 ^{1
2}
董瑞琨（1973-），男，教授，博导，主要研究方向：路面结构、路面材料、路面维修养护和特种路面
陈骏 ^{1
2} 赵梦珍 ^{1
2}

1、重庆大学土木工程学院，重庆 400045
2、重庆大学山地城镇建设与新技术教育部重点实验室，重庆市 40045

摘要：为探究高温裂解高掺量胶粉改性沥青混合料路用性能以及沥青胶结料性质对混合料性能的影响，本研究制备了高温裂解高掺量胶粉改性沥青及高温裂解高掺量胶粉/PE复合改性沥青，以70#基质沥青与普通胶粉改性沥青为对照，并在最佳油石比下成型AC-13型沥青混合料试件。采用流变学试验对沥青胶结料的高低温性能进行测定，通过冻融劈裂试验、车辙试验、弯曲蠕变试验和四点弯曲疲劳寿命试验对混合料水稳定性、高温稳定性、低温抗裂性和疲劳性能进行评价。研究结果表明：高温裂解高掺量胶粉极大地提高了沥青混合料的水稳定性与抗疲劳性能；60℃时MSCR的蠕变回复率R和不可恢复蠕变柔量Jnr与混合料动稳定度有较强相关性；沥青混合料累计车辙深度显示，高温裂解高掺量胶粉改性沥青混合料高温性能优于普通胶粉改性沥青混合料；采用PE对高温裂解高掺量胶粉进行复合改性后可大幅提高沥青及其混合料高温性能。采用破坏强度、破坏应变与应变能密度对混合料低温性能进行评价，发现高温裂解高掺量胶粉改性沥青混合料的低温性能远优于基质沥青与普通胶粉改性沥青混合料，但PE对混合料低温性能有负面影响。劲度模量S、蠕变速率m与破坏应变均有较强线性相关，相关系数分别大于0.87、0.95。

关键词：道路工程路面材料混合料性能脱硫裂解胶粉类改性高掺量

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Pavement Performance of Pyrolyzed High Content Crumb Rubber Modified Asphalt

DONG Ruikun ^{1
2}
董瑞琨（1973-），男，教授，博导，主要研究方向：路面结构、路面材料、路面维修养护和特种路面
CHEN Jun ^{1
2} ZHAO Mengzhen ^{1
2}

1、School of Civil Engineering, Chongqing University, Chongqing 40045, China
2、 Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China

Abstract：In order to explore the pavement performance of pyrolyzed high content crumb rubber (PHC) modified asphalt mixture and the influence of asphalt binder properties on the performance of the mixture. In this study, PHC modified asphalt and PHC composite PE modified asphalt were prepared. The 70 # matrix asphalt and ordinary crumb rubber modified asphalt were selected as control group. Under the condition of the optimal asphalt aggregate ratio, asphalt mixtures were papered by AC-13 gradation. The rheological tests were used to determine the high-and-low temperature performance of the asphalt binders. The freeze-thaw test, rutting test, bending creep test and four-point bending fatigue test were used to analyze the water stability, high temperature stability, low temperature performance and fatigue performance, respectively. The results show that PHC remarkably improve the water stability and anti-fatigue performance of the asphalt mixture. The creep recovery rate R and the non-recoverable creep compliance Jnr obtained from MSCR at 60 ℃ have a significant correlation with the dynamic stability of the mixture. The PHC modified asphalt mixture presents a better high-temperature performance than that of the ordinary crumb rubber modified asphalt mixture according to the results of cumulative rutting depth. The high-temperature performance of PHC and its mixture was improved after addition of PE. The failure strength, failure strain and strain energy density were used to evaluate the low-temperature cracking resistance of the mixture. It is found that the low-temperature performance of PHC modified asphalt mixture is much better than that of the matrix asphalt and ordinary crumb rubber modified asphalt mixture, but PE has a negative effect on the low-temperature performance of the mixture. The stiffness modulus S, creep rate m and failure strain are all strongly linearly correlated, and correlation coefficients are greater than 0.87 and 0.95, respectively.

Keywords： road engineering pavement materials mixture performance desulfurization and pyrolysis crumb rubber modification high content

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董瑞琨，陈骏，赵梦珍. 高温裂解高掺量胶粉改性沥青路用性能[EB/OL]. 北京：中国科技论文在线 [2020-05-22]. https://www.paper.edu.cn/releasepaper/content/202005-171.

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论文编号	202005-171
论文题目	高温裂解高掺量胶粉改性沥青路用性能
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