Research Progress and Performance Evaluation of SBS/CR-modified Asphalt

被引：0
|
作者：
Song L. [1 ,2 ,3 ]
Wang C.-H. [1 ]
Shu C. [1 ]
Liu L.-Q. [1 ]
机构：
[1] School of Highway, Chang'an University, Xi'an
[2] Xinjiang Transportation Planning Surveying and Design Institute Co. Ltd., Urumqi
[3] College of Transportation Engineering, Tongji University, Shanghai
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2021年 / 34卷 / 10期
基金：
中国博士后科学基金;
关键词：
Grading; Performance evaluation; Review; Road engineering; SBS/CR-modified asphalt;
D O I：
10.19721/j.cnki.1001-7372.2021.10.002
中图分类号：
学科分类号：
摘要：
Herein, the raw material selection and preparation process of the asphalt were summarized to further promote the development of SBS/CR asphalt technology in this study. A reasonable mixing scheme and preparation method were recommended. The mechanism of SBS/CR modification was discussed. Moreover, the rheological and basic properties of the asphalt were investigated. The performance differences between SBS/CR-modified asphalt, base asphalt, SBS asphalt, and rubber asphalt were compared, and the performance grades of SBS/CR-modified asphalt were divided based on the statistical results and specifications. The results show that SBS/CR-modified asphalt is mainly prepared by high-speed shear or colloidal milling. The common mixing methods are as follows: 2%-3.5% SBS, 10%-20% crumb rubber, 170℃-180℃ asphalt heating temperature, and 4 000-5 000 r•min-1. In addition, the composite modification process of SBS/CR on asphalt involves mainly physical action supplemented by chemical reactions, asphalt components, and crumb rubber treatment methods, which significantly affects the dispersion state of modified materials. Compared with base asphalt, rubber asphalt, and SBS asphalt, the comprehensive performance of SBS/CR-modified asphalt is better, and its rheological classification basically meets the requirements of PG 76 and PG-22. According to the box chart data and asphalt specifications, the performance of the modified asphalt can be divided into four grades: excellent, good, medium, and poor. The performance requirements of SBS/CR-modified asphalt suitable for cold, warm, and hot regions have been recommended. In view of the great progress in the research of SBS/CR-modified asphalt technology, it is urgent to establish the relationship between the indoor modification process and factory-end production, explore the performance evolution law under coupling conditions, and optimize its storage stability technology and construction supporting technology. © 2021, Editorial Department of China Journal of Highway and Transport. All right reserved.
引用
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页码：17 / 33
页数：16
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