Behavioural mechanism of SBR, LDPE, and SBS modified bituminous mixtures

IF 1.6 Q3 ENGINEERING, CIVIL

Australian Journal of Civil Engineering Pub Date : 2021-11-24 DOI:10.1080/14488353.2021.1993527

A. Mansourian, M. Ameri, Mohammad Hassan Mirabi Moghaddam, E. Riahi, H. Shaker, A. Ameri

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引用次数: 3

Abstract

ABSTRACT Increased heavy-vehicle traffic, higher traffic volumes, and temperature changes lead to distresses such as stripping, rutting, fatigue cracks in asphalt pavements, increasing the cost of road maintenance. Therefore, it is inevitable that the properties of bitumen and asphalt mixtures must be improved. Polymer modification is one of the methods to improve bitumen properties. In the present paper, styrene butadiene styrene (SBS), styrene-butadiene rubber (SBR), and low-density polyethylene (LDPE), along with Sasobit wax, were used to modify the bitumen. For that purpose, we used tests, including conventional bitumen tests and linear amplitude sweep (LAS) tests. The results of the present study showed that the polymer mentioned above improves the rutting index of the base bitumen. Based on the bending beam test results, polymer additives and Sasobit have no positive effect on the low-temperature performance of the base bitumen. The LAS test results were used to compare PMBs’ fatigue performance, and it was evident that SBR had the most significant effect on increasing the fatigue life of the base bitumen. In the meantime, Sasobit increases the fatigue life of PMBs at high strain levels.

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SBR、LDPE和SBS改性沥青混合料的行为机理

摘要重型车辆流量的增加、交通量的增加和温度的变化导致沥青路面出现剥离、车辙、疲劳裂缝等病害，增加了道路养护成本。因此，必须改善沥青和沥青混合料的性能。聚合物改性是改善沥青性能的方法之一。本文采用苯乙烯-丁二烯-苯乙烯（SBS）、苯乙烯-丁二烯橡胶（SBR）、低密度聚乙烯（LDPE）和萨索比特蜡对沥青进行改性。为此，我们使用了测试，包括传统沥青测试和线性振幅扫描（LAS）测试。研究结果表明，上述聚合物提高了基础沥青的车辙指数。根据弯梁试验结果，聚合物添加剂和Sasobit对基础沥青的低温性能没有积极影响。LAS试验结果用于比较PMBs的疲劳性能，结果表明SBR对提高基础沥青的疲劳寿命影响最大。同时，Sasobit在高应变水平下增加了PMB的疲劳寿命。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Australian Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

3.90

自引率

7.70%

发文量