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水下不分散混凝土的配制及性能影响

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采用单一变量法和正交试验法,探究了水胶比、絮凝剂掺量和粉煤灰掺量对水下不分散混凝土流动性、抗压强度及抗渗性能的影响.结果表明:絮凝剂掺量对混凝土流动性影响最大,为保证施工时混凝土有较好的流动性,絮凝剂掺量不宜过多,采用粉煤灰适量取代水泥,能节约经济成本,提高混凝土的流动性.水胶比对混凝土抗压强度和抗渗性能的影响最大,当水胶比为0.39、絮凝剂掺量为3.0%、粉煤灰掺量为15%时,水下不分散混凝土的抗压强度与抗渗性能最高.
Research on the preparation and performance of anti-washout underwater concrete
The effects of water-binder ratio,flocculant and fly ash content on the fluidity,compressive strength and imperme-ability of underwater concrete were investigated using single variable method and orthogonal experimental method.The results show that the flocculant has the greatest effect on the fluidity of concrete.To ensure good fluidity of concrete during construction,the dosage of flocculant should not be too high.Using a suitable amount of fly ash instead of cement can save economic cost and im-prove the fluidity of concrete.The water-binder has the greatest impact on the compressive strength and impermeability of con-crete.When the water-binder ratio is 0.39,the flocculant dosage is 3.0%,and the fly ash dosage is 15%,the compressive strength and impermeability of anti-washout underwater concrete are the highest.

anti-washout underwater concreteflocculantwater-binder ratiofly ash

陈明慧、熊英建、李贵阳、张沂、程永舟

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湖南省水运建设投资集团有限公司,湖南长沙 410011

中交二航局第三工程有限公司,江苏镇江 212000

长沙理工大学水利与环境工程学院,湖南长沙 410114

水下不分散混凝土 絮凝剂 水胶比 粉煤灰

湖南省交通科技项目

202224

2024

新型建筑材料
中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD
影响因子:0.569
ISSN:1001-702X
年,卷(期):2024.51(9)