水下不分散混凝土的配制及性能影响  

Research on the preparation and performance of anti-washout underwater concrete

作　　者：陈明慧 熊英建 李贵阳 张沂 程永舟[3] CHEN Minghui;XIONG Yingjian;LI Guiyang;ZHANG Yi;CHENG Yongzhou(Hunan Water Transport Construction Investment Group Co.Ltd.,Changsha 410011,China;The Third Engineering Co.Ltd.of China Second Navigation Bureau,Zhenjiang 212000,China;School of Hydraulic and Environmental Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]湖南省水运建设投资集团有限公司,湖南长沙410011 [2]中交二航局第三工程有限公司,江苏镇江212000 [3]长沙理工大学水利与环境工程学院,湖南长沙410114

出　　处：《新型建筑材料》2024年第9期121-124,共4页New Building Materials

基　　金：湖南省交通科技项目(202224)。

摘　　要：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。The effects of water-binder ratio,flocculant and fly ash content on the fluidity,compressive strength and impermeability 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 improve the fluidity of concrete.The water-binder has the greatest impact on the compressive strength and impermeability of concrete.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.

关 键 词：水下不分散混凝土 絮凝剂 水胶比 粉煤灰 

分 类 号：TU528.36[建筑科学—建筑技术科学]