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Properties of rubberized concrete modified by using silane coupling agent and carboxylated SBR

机译：硅烷偶联剂和羧化丁苯橡胶改性橡胶混凝土的性能

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摘要

Using waste rubbers as aggregates in concrete is a feasible approach to recycle the material. However, due to the poor adhesion of rubber to cement paste, the replacement of normal aggregate with rubber will lead to a reduction in the mechanical strength of concrete. This paper presents a new approach to overcome this deficiency by treating waste rubbers with silane coupling agent (SCA) and carboxylated styrene butadiene rubber (CSBR) latex to develop chemical bonds between rubbers and cement paste. This study investigates the influence of this surface treatment on the mechanical strength and chloride penetration resistance of rubberized concrete. Experiments were conducted with six different volume fractions of rubbers (between 0% and 30%) to replace fine aggregate in the concrete. The experimental results showed that the compressive strength and flexural strength of concretes incorporating proper amount of treated rubbers could be improved by 4% and 13% respectively as compared to the control concrete with no rubbers. Moreover, the chloride penetration resistance was also improved by 35%. The good adhesion of waste rubbers to cement paste, the formation of rubber networks and the embedding effect of rubbers as shown in SEM images are explanations for the enhancement in the mechanical strength and durability for the treated rubber concrete. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在混凝土中使用废橡胶作为骨料是回收材料的可行方法。但是，由于橡胶与水泥浆的粘合性差，用橡胶代替普通骨料会导致混凝土的机械强度降低。本文提出了一种通过使用硅烷偶联剂（SCA）和羧化丁苯橡胶（CSBR）乳胶处理废旧橡胶以发展橡胶与水泥浆之间的化学键的方法来克服这一缺陷。这项研究调查了这种表面处理对橡胶混凝土的机械强度和抗氯化物渗透性的影响。用六种不同体积分数的橡胶（介于0％和30％之间）代替混凝土中的细骨料进行了实验。实验结果表明，与不含橡胶的对照混凝土相比，掺入适量已处理橡胶的混凝土的抗压强度和抗弯强度分别提高了4％和13％。此外，耐氯化物渗透性也提高了35％。如SEM图像所示，废橡胶与水泥浆的良好粘合性，橡胶网络的形成以及橡胶的包埋效果，可以解释处理后的橡胶混凝土的机械强度和耐久性的提高。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Cleaner Production》 |2016年第1期|797-807|共11页
  • 作者

    Li Gengying; Wang Zhongkun; Leung Christopher K. Y.; Tang Shengwen; Pan Jun; Huang Wensi; Chen E.;

  • 作者单位

    Shantou Univ, Dept Civil Engn, Shantou 515063, Peoples R China|Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong 852, Hong Kong, Peoples R China;

    Shantou Univ, Dept Civil Engn, Shantou 515063, Peoples R China|Guangdong Higher Educ Inst, Key Lab Struct & Wind Tunnel, Shantou 515063, Peoples R China;

    Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong 852, Hong Kong, Peoples R China;

    Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China;

    Shantou Univ, Dept Civil Engn, Shantou 515063, Peoples R China|Guangdong Higher Educ Inst, Key Lab Struct & Wind Tunnel, Shantou 515063, Peoples R China;

    Shantou Univ, Dept Civil Engn, Shantou 515063, Peoples R China|Guangdong Higher Educ Inst, Key Lab Struct & Wind Tunnel, Shantou 515063, Peoples R China;

    Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong 852, Hong Kong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Recycled waste rubbers; Surface treatment; Mechanical strength; Chloride penetration resistance;

    机译：再生废橡胶;表面处理;机械强度;耐氯化物渗透性;

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