Investigation on the interfacial behaviour between the rubber-cement matrix of the rubberized concrete

被引:102
作者
Chen, Zhuoming [1 ,2 ]
Li, Lijuan [1 ]
Xiong, Zhe [1 ]
机构
[1] Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Rubberized concrete; Interface improvement; Interfacial property; Bond strength; Surface modification; Water-binder ratio; CRUMB RUBBER; TIRE RUBBER; PERFORMANCE; MORTAR;
D O I
10.1016/j.jclepro.2018.10.305
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Rubberized concrete is an innovative clean production material. In this study, the interfacial behaviour of the rubber-cement matrix (R-CM) of rubberized concrete was improved by selecting better rubber types, surface modifiers, mixing methods, supplementary cementing materials (SCMs), water-binder ratio (W/B ratio), and mixing time. The slump, apparent density, compressive strength, impact strength, and R-CM interfacial bonding property of the rubberized concrete were determined. The results showed that the following combination delivered an improved rubberized concrete (IRC) with the best R-CM interfacial bond strength - acrylonitrile-butadiene rubber (NBR), W/B ratio of 0.42, mixing time of 150 s, styrene-butadiene latex (SBL) as a surface modifier and a SCM, premixing rubber and binder paste. The main factors affecting the R-CM interfacial bonding properties were the rubber type, surface modifier, mixing method, and W/B ratio. Compared to the reference rubberized concrete, the R-CM interfacial tensile bond strength, shear bond strength, compressive strength, and impact strength of IRC increased by 756%, 151%, 48.1%, and 17%, respectively. As a surface modifier. SBL provided a connection between NBR and the binder paste, while as a SCM, it created an environment for reducing the W/B ratio of rubberized concrete. The R-CM interface was found to play a major role in controlling the macro mechanical properties of rubberized concrete. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1354 / 1364
页数:11
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