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硅烷偶联剂改性轻集料及其内养护性能
Internal Curing Properties of Lightweight Aggregate Modified with Silane Coupling Agent
投稿时间:2018-06-08  修订日期:2018-08-03
DOI:103969/j.issn.1007 9629201903010
中文关键词:  轻集料  硅烷偶联剂  内养护  抗裂性
英文关键词:lightweight aggregate  silane coupling agent(SCA)  internal curing  cracking resistance
基金项目:武汉城建科技计划项目(201614)
           
作者单位
唐冬云
TANG Dongyun
广西大学土木建筑工程学院,广西南宁530003
College of Civil Engineering and Architecture, Guangxi University, Nanning 530003, China
谢肖礼
XIE Xiaoli
广西大学土木建筑工程学院,广西南宁530003
College of Civil Engineering and Architecture, Guangxi University, Nanning 530003, China
程华强
CHENG Huaqiang
武汉市市政建设集团有限公司,湖北武汉430000
Wuhan Municipal Construction Group Co., Ltd., Wuhan 430000, China
李明
LI Ming
江苏苏博特新材料股份有限公司,江苏南京211103
Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
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中文摘要:
      采用硅烷偶联剂(SCA)溶液改性轻集料,研究了改性轻集料作为内养护介质时的性能.结果表明:SCA溶液对轻集料内养护性能的影响与其质量分数有关,当SCA的质量分数为005%和010%时,可进一步优化轻集料与水泥石的界面过渡区,提高内养护混凝土的力学性能及内养护减缩效率;采用适宜质量分数的SCA改性后的轻集料在实现混凝土内部湿度调控、降低收缩的同时,还可提高混凝土结构的自身抗力,有助于提升混凝土的抗裂性能.
英文摘要:
      Internal curing properties of lightweight aggregate modified with silane coupling agent(SCA) solution were investigated. Results indicate that the related internal curing properties of modified lightweight aggregate are affected by the concentration of SCA. With the mass fraction of SCA of 005% and 010%, the quality of interfacial transition zone between lightweight aggregate and cement paste can be further improved, shrinkage reducing efficiency of lightweight aggregate and mechanical properties of concrete are also enhanced. By using an appropriate concentration of SCA solution, the modified lightweight aggregate can reduce the shrinkage by regulating the internal humidity and increasing the resistance of structure, which is beneficial to increase the cracking resistance of concrete.
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