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首页> 外文会议>Testing and evaluation of advanced building materials >Influence and Mechanisms of In-Situ Toughening Telechelic Polymer on The Microstructure of Concrete
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Influence and Mechanisms of In-Situ Toughening Telechelic Polymer on The Microstructure of Concrete

机译：原位增韧远螯聚合物对混凝土微观结构的影响及其机理

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摘要

To find out the toughening mechanism of in-situ toughening telechelic polymers (ITTP) in concrete, SEM & EDS and Nano indenter were used to research the variation of concrete hydration products and the interfacial transition zone between the cement paste and aggregate. The results indicate that the toughening effect of ITTP is not carried out by film formation. And the proportion of LD C-S-H in cement hydration products increased significantly and the CH content decreased after introducing the ITTP into concrete. Nano indentation test results show that the non-dense area ratio of ITZ decreased, and the CH content in ITZ increased slightly. The Ca/Si blurred from mutation pattern with decreasing the distance to aggregate surface in the region of interfacial transition zone between aggregate and cement paste, and the thickness of ITZ increased. The conclusions show that the ITZ and hydration products are both key micro-structures which affect the toughness of concrete, and it provides us some guidance for realizing concrete toughness ascension through microstructure adjustment.
机译：为了了解混凝土中原位增韧远螯聚合物（ITTP）的增韧机理，采用SEM＆EDS和纳米压头研究了混凝土水化产物的变化以及水泥浆与骨料之间的界面过渡区。结果表明，ITTP的增韧作用不是通过成膜来实现的。将ITTP引入混凝土后，LD C-S-H在水泥水合产品中的比例显着增加，CH含量降低。纳米压痕试验结果表明，ITZ的非致密面积比降低，ITZ中的CH含量略有增加。随着骨料和水泥浆体之间界面过渡区域区域中距离骨料表面距离的减小，Ca / Si从突变型变模糊，并且ITZ的厚度增加。结论表明，ITZ和水合产物都是影响混凝土韧性的关键微观结构，为通过调整微观结构实现混凝土的韧性提升提供了指导。

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  • 来源
  • 会议地点 Shanghai(CN)
  • 作者

    X.B. Zhu; P. Feng; J.P. Liu; B. Ding; J.X. Hong;

  • 作者单位

    State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science, Nanjing 210008, China,Jiangsu Bote New Material Co., Ltd, Nanjing 210008, China;

    School of Materials Science Engineering of Southeast University, Nanjing 211189, China;

    State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science, Nanjing 210008, China,Jiangsu Bote New Material Co., Ltd, Nanjing 210008, China;

    State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science, Nanjing 210008, China,Jiangsu Bote New Material Co., Ltd, Nanjing 210008, China;

    Jiangsu Bote New Material Co., Ltd, Nanjing 210008, China,Jiangsu Bote New Material Co., Ltd, Nanjing 210008, China;

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

    In-situ toughening telechelic polymer; Toughness; ITZ; Nano indentation;

    机译：原位增韧远螯聚合物；韧性; ITZ；纳米压痕;

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