华中科技大学学报（自然科学版）2024，Vol.52Issue(10)：1-6,26,7.DOI:10.13245/j.hust.240465
土-聚合物改性膨润土阻隔墙材料和易性研究
Study on workability properties of polymer modified bentonite as cutoff wall materials
摘要
Abstract
The effects of bentonite content and type on engineering properties of bentonite slurry and backfill were analyzed using Na-activated Ca-bentonite bentonite(Na-CaB)and self-developed polymer-modified bentonite(PMB).Experiment results show that 10.4%and 7%bentonite contents can achieve the workability requirement for Na-CaB slurry and PMB slurry,respectively,according to the influence of bentonite content on the properties(i.e.,pH,density,Marsh funnel viscosity and filtration)of bentonite slurry.PMB backfill is easier to meet workability requirements using lower bentonite content and lower water content,as the required water content is less interfered by the changes in liquid limit.According to the mini-slump tests,a range of water content and a controlled water content are determined for two types of backfill material of the vertical cutoff wall for meeting workability requirements.PMB backfill is easier to meet workability requirements using lower bentonite content and lower water content,as the required water content is less interfered by the changes in liquid limit.关键词
和易性/竖向阻隔墙/膨润土/聚合物改性膨润土/坍落度Key words
workability/vertical cutoff wall/bentonite/polymer modified bentonite/slump分类
建筑与水利引用本文复制引用
姜璐莎,代展鸿,蒲诃夫,董晓强..土-聚合物改性膨润土阻隔墙材料和易性研究[J].华中科技大学学报（自然科学版）,2024,52(10):1-6,26,7.基金项目
国家重点研发计划资助项目(2019YFC1806000) （2019YFC1806000）
国家自然科学基金资助项目(52078235). （52078235）
