偏高岭土对理化复合法处理淤泥浆强度的影响  

Effect of metakaolin on strength of mud slurry treated by physicochemical composite method

作　　者：董超强 章荣军[1] 苗雨[1] 郑俊杰[1] DONG Chaoqiang;ZHANG Rongjun;MIAO Yu;ZHENG Junjie(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2021年第10期1-6,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点研发计划资助项目(2016YFC0800200);国家自然科学基金资助项目(51978303,51678266)。

摘　　要：探究偏高岭土(MK)掺入或替代部分水泥后,经理化复合法处理的淤泥强度贡献率是否等同或优于纯水泥固化淤泥.通过开展十字板剪切试验讨论MK掺量和MK替代比对理化复合法处理疏浚淤泥强度贡献率的影响规律.结果表明:当水泥掺量较大时,在理化复合法处理淤泥浆中加入少量的MK,处理后的淤泥强度贡献率不会随之改变;此外,不同MK替代比对理化复合法处理后淤泥强度贡献率影响显著,当MK替代比为20%时,淤泥强度贡献率最大,与之对应MK和水泥的最优掺量比约为6%:24%.Whether the strength contribution rate(PSCR)of physicochemical composite method(PCM)treated mud slurry after adding metakaolin(MK)or partially replacing cement by MK was equivalent or better than that of mud specimens whose solidification component was only cement was investigated.The effect of MK content and MK replacement ratio on the PSCRof PCM treated mud slurry was discussed via conducting vane shear tests.Results show that when the cement content is relatively high,the PSCRof PCM treated mud slurry will not change after adding a small amount of MK.Moreover,different replacement ratios of MK have a significant effect on the PSCRof PCM treated mud.When the MK replacement ratio is 20%,the PSCRis the highest,and the optimal dosage ratio of MK and cement is around 6%:24%.

关 键 词：淤泥浆 理化复合法 偏高岭土 强度贡献率 含水率 

分 类 号：TU411.5[建筑科学—岩土工程]