摘要
为分析固废基固化剂对高含水率淤泥的固化效果,同时解决流动固化法固化效果难以控制的技术现状,研究了以普通硅酸盐水泥(OPC)-矿渣微粉(GBFS)-钢渣微粉(SS)-脱硫石膏(DG)体系制备的土体固化剂对高含水率淤泥的无侧限抗压强度及其固化机理的影响。研究表明,OPC-GBFS-SS-DG(O-G-S-D)体系土体固化剂对淤泥的固化效果表现为O-G-S-D固化体7 d强度略高于水泥固化体,28 d强度则低于水泥固化体。O-G-S-D体系土体固化剂对淤泥的固化效果主要源于其在淤泥土中能快速生成大量针棒状的钙矾石(AFt),其将淤泥土颗粒连接在一起,形成三维空间网络,并且后期水化硅酸钙凝胶(CSH)持续增多,逐步填充孔隙,形成致密的整体,强度不断发展所致。
In order to analyze the curing effect of solid waste base curing agents on silt with high water content,and to address the technical status that the curing effect of flow curing method is difficult to control,the effect of soil curing agents prepared by ordinary silicate cement(OPC)-slag micronized powder(GBFS)-steel slag micronized powder(SS)-desulfurization gypsum(DG)system on the unconfined compressive strength of high water content silt and its curing mechanism was investigated in this paper.The curing effect of OPC-GBFS-SS-DG(O-G-S-D)system soil curing agent on silt was shown to be slightly higher than that of cement curing body at 7 d and lower than that of cement curing body at 28 d.The curing effect of O-G-S-D system soil curing agent on silt was mainly due to its ability to rapidly produce a large amount of pin-rod-like calcium alumina(AFt),which connects the silt particles together to form a three-dimensional spatial network,and the continuous increase of hydrated calcium silicate gel(CSH)at a later stage,which gradually fills the pores and forms a dense whole and the strength develops continuously.
作者
王安辉
黄虎
张艳芳
倪娇娇
荣辉
WANG An-hui;HUANG Hu;ZHANG Yan-fang;NI Jiao-jiao;RONG Hui(China Construction Industrial&Energy Engineering Group Co.,Ltd.,Nanjing,Jiangsu 210023,China;School of Materials Science and Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Key Laboratory of Building Green Functional Materials,Tianjin Chengjian University,Tianjin 300384,China)
出处
《中国港湾建设》
2023年第10期44-50,共7页
China Harbour Engineering
基金
住房和城乡建设部科学技术计划项目(2021-K-114)
江苏省建设系统科技项目(2021ZD53)。
关键词
土体固化剂
淤泥固化
无侧限抗压强度
固化机理
soil curing agent
silt solidification
unconfined compressive strength
curing mechanism
