Physicochemical Treatment of Dredged Clay Slurry Waste for Land Reclamation Purpose

摘要：

　　Application of chemically solidified dredged marine clay as land reclamation fill can not only mitigate the issue of local scarcity of ideal filling material,but also allow significant volumes of unwanted marine clay arising from dredging to be disposed economically and ecologically.Nevertheless,treatment efficiency of pure chemical solidification at extra-high water content is very low or even marginal.This study aims to develop a new physicochemical method(PCM)for efficient treatment of dredged clay slurry waste at extra-high water content.It is essentially to reduce the equivalent water content by the flocculation component in the initial curing stage and solidify the dewatered clay slurry by the chemical solidification component in the later curing stage.A number of laboratory experiments are performed on clay samples treated by both the pure chemical method(CM)and PCM.Comparison results show that,when the initial water content of the dredged clay slurry is higher than 300%,the undrained shear strength of PCM treated marine clay slurry is 8 times larger than that of CM mix with the same content of chemical solidification component.This demonstrates well the feasibility and efficiency of PCM for land reclamation purpose.

关键词： Dredged clay slurry waste Land reclamation Physicochemical solidification Pure chemical solidification Treatment efficiency

作者: Rong-jun Zhang Chao-qiang Dong Jun-jie Zheng

作者单位: Institute of Geotechnical and Underground Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

会议类型: 国际会议

会议名称: The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)

会议地点: 杭州

会议语种:英文

页码: 243-249

在线出版日期: 2018-10-28（万方平台首次上网日期，不代表论文的发表时间）