长江科学院院报2017，Vol.34Issue(5)：109-114,6.DOI:10.11988/ckyyb.20160153
固化剂固化疏浚土的渗透性与微观机理研究
Permeability and Micro-mechanism of Dredged MudSolidified with Curing Agent
摘要
Abstract
Dredged mud from Hengsha island in Shanghai was improved by curing agent combining exciting agent and bonding agent such as cement and lime.Permeability tests were designed to study the permeability of the improved dredged mud in the presence of different curing ages and curing agent dosages.The relations of permeability coefficient of solidified dredged mud vs.curing agent content and curing time were analyzed,and the law of changes in permeability coefficient was obtained.Furthermore,the microstructure of solidified dredged mud with different curing agent contents and curing ages was observed by Scanning Electron Microscope (SEM) and the SEM images before and after solidification were obtained.According to the SEM images,changes in the microstructure of dredged mud before and after solidification were compared and analyzed.Results show that the permeability coefficient of solidified dredged mud decreased obviously with the increase of curing agent content and curing age;while under the same curing age,permeability coefficient changed little when curing agent content kept increasing.Micro-structure analysis indicates that calcium silicate hydrated (C-S-H),Ca(OH)2 crystal,CaCO3 crystal,amorphous aragonite and ettringite which could fill the pores were found in solidified dredged mud.Moreover,the mechanism of solidification of dredged mud was also analyzed from microscopic viewpoint.关键词
固化疏浚土/固化剂/渗透系数/微观结构/固化机理Key words
solidified dredged mud/curing agent/permeability coefficient/microstructure/solidification mechanism分类
建筑与水利引用本文复制引用
崔勇涛,刘文白..固化剂固化疏浚土的渗透性与微观机理研究[J].长江科学院院报,2017,34(5):109-114,6.基金项目
国家自然科学基金项目(51078228) （51078228）
国家海洋公益性行业科研专项(201105024-5) （201105024-5）
2013年上海市研究生教育创新计划实施项目(20131129) （20131129）
上海海事大学研究生学术新人培育计划(YXR2015095) （YXR2015095）
