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首页> 外文期刊>RSC Advances >A cement paste-tail sealant interface modified with a silane coupling agent for enhancing waterproofing performance in a concrete lining system
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A cement paste-tail sealant interface modified with a silane coupling agent for enhancing waterproofing performance in a concrete lining system

机译：用硅烷偶联剂改性水泥糊尾密封膜接口，用于在混凝土衬里系统中提高防水性能

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摘要

Although hydrophobic surface coating of concrete is currently used to enhance waterproofing performance of underground structures, the chemical and mechanical incompatibility between an inorganic cement and organic coating makes it a challenge to ensure long-term waterproofing properties of underground facilities, especially for tunnel lining systems. This study explores the feasibility of using a silane coupling agent to improve compatibility between the cement and tail sealant interface, which aims to reduce the water leakage risk of lining systems. The enhanced waterproofing performance of the cement-tail sealant interface modified with the silane agent was confirmed by its hydrophobicity (i.e. reduced wetting ability) and reduced permeability, which was evaluated by static water-contact angle and impermeability pressure measurements. The processes underlying the enhanced waterproofing performance of the cement-tail sealant interface were revealed by chemical bonding, microstructure and porosity characterization. Fourier transform infrared spectroscopy (FTIR) results of the cement-tail sealant interface confirm the reactions between the silane agent and cement hydration products, while both microstructure and porosity results reveal that the cement-tail sealant interface is denser and less porous, relative to the control cement grout.
机译：虽然混凝土的疏水表面涂层目前用于增强地下结构的防水性能，但无机水泥和有机涂层之间的化学和机械不相容性使其成为确保地下设施的长期防水性能的挑战，特别是对于隧道衬里系统。本研究探讨了使用硅烷偶联剂改善水泥和尾部密封膜界面之间的相容性的可行性，旨在降低衬里系统的漏水风险。通过其疏水性（即润湿能力降低）证实了用硅烷试剂改性的水泥尾密封膜接口的增强的防水性能，并通过静态水 - 接触角和不渗透性压力测量来评估的渗透率降低。通过化学键合，微观结构和孔隙率表征揭示了水泥尾密封膜界面的增强防水性能的过程。傅里叶变换红外光谱（FTIR）水泥尾部密封膜的结果证实了硅烷试剂和水泥水合产物之间的反应，而微观结构和孔隙率结果表明，水泥尾部密封膜界面是密集且较少的多孔，相对于控制水泥灌浆。

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  • 来源
    《RSC Advances》 |2019年第13期|共11页
  • 作者

    Li Fan; Yang Yuyou; Tao Mingjiang; Li Xiangqian;

  • 作者单位

    China Univ Geosci Beijing Sch Engn &

    Technol Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Sch Engn &

    Technol Beijing 100083 Peoples R China;

    Worcester Polytech Inst Dept Civil &

    Environm Engn Worcester MA 01609 USA;

    China Univ Geosci Beijing Sch Engn &

    Technol Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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