Study on workability properties of polymer modified bentonite as cutoff wall materials

被引：0
作者：
Jiang, Lusha [1 ]
Dai, Zhanhong [1 ]
Pu, Hefu [1 ,2 ]
Dong, Xiaoqiang [2 ]
机构：
[1] School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan
[2] School of Civil Engineering, Taiyuan University of Technology, Taiyuan
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2024年 / 52卷 / 10期
关键词：
bentonite; polymer modified bentonite; slump; vertical cutoff wall; workability;
D O I：
10.13245/j.hust.240465
中图分类号：
学科分类号：
摘要：
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． © 2024 Huazhong University of Science and Technology. All rights reserved.
引用
收藏
页码：1 / 6and26
页数：625
相关论文
共 13 条
  • [1] SHARMA H D, REDDY K R．, Geoenvironmental engineering： site remediation， waste containment， and emerging waste management technologies[M], (2004)
  • [2] (2017)
  • [3] DANIEL D E．, Geotechnical practice for waste disposal [M], (2012)
  • [4] MALUSIS M A, EVANS J C, MICHAEL M H, A miniature cone for measuring the slump of soil-bentonite cut-off wall backfill[J], Geotechnical Testing Journal, 31, 5, pp. 373-380, (2008)
  • [5] EMIDIO D G，, MAZZIERI F，, VERASTEGUIFLORES R D, Et al., Polymer-treated bentonite clay for chemical-resistant geosynthetic clay liners[J], Geosynthetics International, 22, 1, pp. 125-137, (2015)
  • [6] RAZAKAMANANTSOA A R，, BARAST G，, DJERANMAIGRE I．, Hydraulic performance of activated calcium bentonite treated by polyionic charged polymer[J], Applied Clay Science, 59, 60, pp. 103-114, (2012)
  • [7] 46, 2, pp. 400-405, (2016)
  • [8] HONG C S，, SHACKELFORD C D，, MALUSIS M, A Consolidation and hydraulic conductivity of zeoliteamended soil-bentonite backfills[J], Journal of Geotechnical and Geoenvironmental Engineering, 138, 1, pp. 15-25, (2012)
  • [9] BOHNHOFF G L，, SHACKELFORD C D．, Hydraulic conductivity of polymerized bentonite-amended backfills [J], Journal of Geotechnical and Geoenvironmental Engineering, 140, 3, (2014)
  • [10] CHEN J N，, SALIHOGLU H，, BENSON C H, Hydraulic conductivity of bentonite-polymer composite geosynthetic clay liners permeated with coal combustion product leachates[J], Journal of Geotechnical and Geoenvironmental Engineering, 145, 9, (2019)
12