SBS改性沥青混合料宏观裂缝微波自愈合研究

doi:10.3969/j.issn.1674-0696.2020.08.13

重庆交通大学学报（自然科学版） ›› 2020, Vol. 39 ›› Issue (08): 84-89.DOI: 10.3969/j.issn.1674-0696.2020.08.13

SBS改性沥青混合料宏观裂缝微波自愈合研究

朱洪洲1,2，袁海2，刘玉峰2，范世平3，丁勇杰2

(1. 重庆交通大学山区道路结构与材料重庆市重点实验室，重庆 400074； 2. 重庆交通大学土木工程学院，重庆 400074； 3. 中国电建集团贵阳勘测设计研究院有限公司，贵州贵阳550081)

收稿日期:2019-02-11 修回日期:2019-04-18 出版日期:2020-08-18 发布日期:2020-08-25
作者简介:朱洪洲（1976—），男，山东莱州人，博士，教授，主要从事路面材料及结构方面的研究。E-mail：zhuhongzhouchina@cqjtu.edu.cn 通信作者：袁海（1995—），男，四川遂宁人，硕士研究生，主要从事路面材料及结构方面的研究。E-mail：787672000@qq.com
基金资助:
重庆交通大学研究生教育创新基金项目（2018S0113）

Microwave Self-healing Properties of Macro-facture in SBS Modified Asphalt Mixture

ZHU Hongzhou1,2, YUAN Hai2, LIU Yufeng2, FAN Shiping3, DING Yongjie2

(1. Chongqing Key Laboratory of Mountainous Road Structure and Materials, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 3. Power China Guiyang Survey, Design and Research Institute Co., Ltd., Guiyang 550081,Guizhou, China)

Received:2019-02-11 Revised:2019-04-18 Online:2020-08-18 Published:2020-08-25

摘要/Abstract

摘要： 为研究微波加热对SBS改性沥青混合料宏观断裂—愈合性能的影响，制备AC-13型沥青混合料半圆试件，采用半圆弯曲试验和微波加热对试件进行断裂—愈合—断裂试验，采用愈合前、合后加载试验的抗拉强度比值作为愈合指数HI（healing index），分析了加热时间和微波强度对试件表面温度和沥青混合料自愈合性能的影响。研究结果表明：微波加热过程主要是集料中的极性粒子吸收微波，产生热量并传递给弱极性的沥青，实现混合料整体升温；试件表面温度随加热时间、微波强度呈良好的二元线性回归关系；在一定范围内，加热时间、微波强度的增长能够促进混合料自愈合行为，这主要与该微波条件下混合料达到的温度有关，AC-13型SBS改性沥青混合料经微波强度700 W，加热100 s或微波强度560 W，加热120s后达到最佳的强度恢复率为83%~85%，试件表面温度在90~96 ℃之间。

关键词: 道路工程, 沥青混合料, 自愈合, 宏观断裂, 微波加热

Abstract: To research the effect of microwave heating on the self-healing performance of macro-fracture of SBS modified asphalt mixture, semi-circular specimens of AC-13 asphalt mixture were prepared. The fracture-healing-fracture test was carried out by means of semicircular bending test and microwave heating. Taking the tensile strength ratio of loading test before and after healing as healing index HI (healing index), the effect of healing time and microwave intensity on the surface temperature of specimen and the self-healing performance of asphalt mixture was analyzed. The research results indicate that the process of microwave heating is mainly that the polar particles in the aggregate absorb the microwave, generate heat and transfer to the weak polarity asphalt, so as to realize the overall temperature rise of the mixture. The surface temperature of the specimens shows a good binary linear regression relationship with heating time and microwave intensity. In a certain range, the increase of heating time and microwave intensity can promote the self-healing behavior of mixture, which is mainly related to the temperature of mixture under the microwave condition. The optimum strength recovery rate of AC-13 SBS modified asphalt mixture is 83%~85% after heating for 100 s under microwave intensity of 700 W or heating for 120 s under microwave intensity of 560 W, and the surface temperature of the specimens is between 90 ℃~96 ℃.

Key words: highway engineering, asphalt mixture, self-healing performance, macro-fracture, microwave heating

中图分类号:

U414

朱洪洲1,2，袁海2，刘玉峰2，范世平3，丁勇杰2. SBS改性沥青混合料宏观裂缝微波自愈合研究[J]. 重庆交通大学学报（自然科学版）, 2020, 39(08): 84-89.

ZHU Hongzhou1,2, YUAN Hai2, LIU Yufeng2, FAN Shiping3, DING Yongjie2. Microwave Self-healing Properties of Macro-facture in SBS Modified Asphalt Mixture[J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(08): 84-89.

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SBS改性沥青混合料宏观裂缝微波自愈合研究

Microwave Self-healing Properties of Macro-facture in SBS Modified Asphalt Mixture

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