Influence of ＲAP Segregation on Performance of Ｒecycled Asphalt Mixture

doi:10.3969 /j.issn.1674-0696.2013.05.12

Journal of Chongqing Jiaotong University(Natural Science) ›› 2013, Vol. 32 ›› Issue (5): 953-957.DOI: 10.3969 /j.issn.1674-0696.2013.05.12

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Influence of ＲAP Segregation on Performance of Ｒecycled Asphalt Mixture

Yu Zhilong¹，Huang Gang¹，He Zhaoyi¹，Wang Guowei¹，Chen Xianyong²

1. School of Civil Engineering ＆ Architecture，Chongqing Jiaotong University，Chongqing 400074，China; 2. Chongqing Zhongjiao Ｒenewable Ｒesources Development Co. Ltd. ，Chongqing 401120，China

Received:2012-07-19 Revised:2012-12-08 Online:2013-10-15 Published:2014-10-27

ＲAP 离析对再生沥青混合料性能的影响分析

俞志龙¹，黄刚¹，何兆益¹，王国伟¹，陈先勇²

1. 重庆交通大学土木建筑学院，重庆400074; 2. 重庆重交再生资源开发有限公司，重庆401120

作者简介:俞志龙( 1986—) ，男，福建仙游人，硕士研究生，主要从事路基路面方面的研究。E-mail: 113340837@ qq． com。
基金资助:
国家自然科学基金项目( 51278513) ; 重庆市科技攻关项目( cstc2012ggA50001)

Abstract

Abstract: Based on laboratory tests，the influence of the state and degree of ＲAP segregation on volume parameter，mechanic performance and service performance of recycled asphalt mixture was analyzed． The study shows that ＲAP segregation has a significant influence on the performance of recycled asphalt mixture，and the coarse ＲAP segregation has a greater influence than fine ＲAP segregation． In the process of coarse ＲAP segregation，the recycled mixtures are of high air voids， which is greatly disadvantageous for the moisture stability and reduce dramatically the low temperature performance，fatigue life and indirect tensile strength． Under the same level of segregation，the coarse ＲAP segregation has a greater influence on the recycled asphalt mixture than that does on the asphalt mixture． Although ＲAP partial fine segregation has no obvious adverse effect on moisture stability and fatigue life of recycled asphalt mixes，it obviously reduces the rutting resistance and crack resistance performance at low temperature．

Key words: recycled asphalt mixture, pavement performance, gradation segregation

摘要： 通过室内模拟试验，分析了沥青回收料( ＲAP) 离析状态和程度对再生料体积参数、力学性能和路用性能的影响。结果表明: ＲAP 离析对再生料性能影响比较显著，且ＲAP 偏粗离析对再生料性能的影响大于偏细离析的影响。在ＲAP 偏粗离析时，造成再生料空隙率过大，对水稳定性极为不利，且大幅度降低再生料的低温性能、疲劳性能和强度，且在同一程度的离析情况下，对再生料性能的影响大于原生料。在ＲAP 偏细离析时，虽然对再生料的水稳定性和抗疲劳性能无不利影响，但将使再生料的抗车辙性能和低温抗裂性能显著降低。

关键词: 再生沥青混合料, 路用性能, 级配离析

CLC Number:

TU528

Yu Zhilong，Huang Gang，He Zhaoyi，Wang Guowei，Chen Xianyong. Influence of ＲAP Segregation on Performance of Ｒecycled Asphalt Mixture[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(5): 953-957.

俞志龙，黄刚，何兆益，王国伟，陈先勇. ＲAP 离析对再生沥青混合料性能的影响分析[J]. 重庆交通大学学报（自然科学版）, 2013, 32(5): 953-957.

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Influence of ＲAP Segregation on Performance of Ｒecycled Asphalt Mixture

ＲAP 离析对再生沥青混合料性能的影响分析

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