鄢亦斌1,2,刘开志1,2,*,高立强1,2,彭嘉华1,2,郭凯正1,2,李 晨1,2
鄢亦斌,刘开志,高立强,等.轻骨料预湿度对轻质UHPC性能及微观结构的影响[J].混凝土与水泥制品,2024(12):14-21.
YAN Y B,LIU K Z,GAO L Q,et al.Effects of pre-wetting degree of lightweight aggregate on performance and microstructure of lightweight UHPC[J].China Concrete and Cement Products,2024(12):14-21.
轻骨料预湿度对轻质UHPC性能及微观结构的影响
鄢亦斌1,2,刘开志1,2,*,高立强1,2,彭嘉华1,2,郭凯正1,2,李 晨1,2
鄢亦斌,刘开志,高立强,等.轻骨料预湿度对轻质UHPC性能及微观结构的影响[J].混凝土与水泥制品,2024(12):14-21.
YAN Y B,LIU K Z,GAO L Q,et al.Effects of pre-wetting degree of lightweight aggregate on performance and microstructure of lightweight UHPC[J].China Concrete and Cement Products,2024(12):14-21.
摘 要:研究了黏土陶砂预湿度(预湿水量分别为0、17.1、34.2 kg/m3)对轻质超高性能混凝土(LUHPC)工作性、力学性能、体积稳定性、抗氯离子渗透性能、抗盐雾侵蚀性能、抗低温性能和抗冻性能的影响,并分析了微观机理。结果表明:对黏土陶砂进行适当的预湿处理有助于改善LUHPC的工作性、力学性能、体积稳定性能、抗氯离子渗透性能、抗盐雾侵蚀性能、抗低温性能和抗冻性能;黏土陶砂预湿处理对LUHPC性能的提升主要归因于其优化了界面过渡区及改善了C-S-H凝胶结构。
Abstract: The effects of the pre-wetting degree of clay ceramic sand(pre-wetting water content was 0, 17.1 kg/m3, and 34.2 kg/m3, respectively) on the workability, mechanical property, volume stability, chloride ion penetration resistance, salt spray corrosion resistance, low temperature resistance, and frost resistance of lightweight ultra-high performance concrete (LUHPC) were investigated, and the micro-mechanisms were analyzed. The results show that, appropriate pre-wetting treatment of clay ceramic sand can help to improve the workability, mechanical property, volume stability, chlorine ion penetration resistance, salt spray corrosion resistance, low temperature resistance and frost resistance of LUHPC. The enhancement of LUHPC performance by the pre-wetting treatment of clay ceramic sand is attributed to the optimization of the interfacial transition zone and the improvement of the C-S-H gel structure.
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