高温蒸养与偏高岭土对高铁相水泥性能的影响
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武汉理工大学

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TU528.36?????????????

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Effects of High Temperature Steam Curing and Metakaolin on Properties of High Ferrite Cement
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Wuhan University of Technology

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    摘要:

    本文采用多种测试方法,分析了高温蒸养和外掺偏高岭土(MK)对高铁相水泥(HFC)宏观和微观性能演变机制.结果表明,高温蒸养为胶凝材料的水化反应提供动力,加快了水化速率,促进C-S-H凝胶与C-A-S-H凝胶的生成;偏高岭土水化消耗了氢氧化钙降低了体系碱度,引入更多的Al生成C-A-S-H凝胶,改善了高铁相水泥的孔隙结构,提升了对氯离子的吸附和固化能力.高温蒸养与偏高岭土复合作用提高了C-A-S-H凝胶含量,提升高铁相水泥基材料抗氯离子侵蚀性能.

    Abstract:

    In this paper, a variety of test methods were used to analyze the evolution mechanism of the macro and micro properties of high ferrite cement (HFC) by high temperature steam curing and external metakaolin (MK). The results show that high temperature steam provides power for the hydration reaction of cementitious materials, increases the hydration rate, and promotes the formation of C-S-H gels and C-A-S-H gels; the hydration of metakaolin consumes calcium hydroxide to reduce the alkalinity of the system, and introduces more Al to generate higher gelling C-A-S-H gels, optimizes the pore structure of HFC, and enhances the adsorption and solidification ability of chloride ions. The composite effect of high-temperature steam curing and metakaolin increases the C-A-S-H gels content and enhances the resistance to chloride ion erosion of HFC.

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  • 收稿日期:2022-03-31
  • 最后修改日期:2022-05-12
  • 录用日期:2022-05-13
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