Compressibility of Compacted Clays Mixed with a Wide Range of Bentonite for Engineered Barriers

被引:0
作者
Usama Khalid
Zia ur Rehman
Chencong Liao
Khalid Farooq
Hassan Mujtaba
机构
[1] Shanghai Jiao Tong University,Civil Engineering Department, State Key Laboratory of Ocean Engineering
[2] COMSATS University Islamabad,Civil Engineering Department
[3] Tsinghua University,State Key Laboratory of Hydroscience and Engineering
[4] University of Engineering and Technology,Department of Civil Engineering
来源
Arabian Journal for Science and Engineering | 2019年 / 44卷
关键词
Clay–bentonite mixtures; Compressibility; Yield stress; Initial void ratio; Compaction characteristics; Correlation models;
D O I
暂无
中图分类号
学科分类号
摘要
Compacted clay–bentonite mixtures are often used as compacted blocks and landfills in high-level radioactive waste repositories and clay liners, respectively. A better understanding of their compressibility behaviour is essential to guarantee the disposal safety. In this study, mixtures of clays and bentonite are used to investigate the compressibility and compaction behaviour. Three natural clays were selected with different physical characteristics, and clay–bentonite mixtures were prepared by mixing the bentonite content up to 50%. A series of standard compaction tests and consolidation tests were performed in the laboratory; the samples for the consolidation test were prepared at the optimum moisture contents and maximum dry unit weights. With increasing bentonite content, the liquid limit, plasticity index, optimum moisture content, initial void ratio and compression index of natural clays increase and maximum dry unit weight and yield stress decrease. It was observed that the effect of bentonite on geotechnical characteristics pronounced when bentonite content exceeded 10%. Correlations were also proposed to estimate the compression characteristics and compression curves of compacted clays using three physical parameters such as the initial void ratio, optimum moisture content and maximum dry unit weight.
引用
收藏
页码:5027 / 5042
页数:15
相关论文
共 170 条
[91]  
Schanz T(undefined)undefined undefined undefined undefined-undefined
[92]  
Fredlund DG(undefined)undefined undefined undefined undefined-undefined
[93]  
Saba S(undefined)undefined undefined undefined undefined-undefined
[94]  
Cui YJ(undefined)undefined undefined undefined undefined-undefined
[95]  
Tang AM(undefined)undefined undefined undefined undefined-undefined
[96]  
Barnichon JD(undefined)undefined undefined undefined undefined-undefined
[97]  
Keramatikerman M(undefined)undefined undefined undefined undefined-undefined
[98]  
Chegenizadeh A(undefined)undefined undefined undefined undefined-undefined
[99]  
Nikraz H(undefined)undefined undefined undefined undefined-undefined
[100]  
Chegenizadeh A(undefined)undefined undefined undefined undefined-undefined