Application of a Bentonite Slurry Modified by Polyvinyl Alcohol in the Cutoff of a Landfill

Soil-bentonite cutoff walls are usually used to contain the contaminants of landfills. The pumpability, permeability, and adsorption capability of the slurry are all crucial to the performance of the cutoff wall. In this study, the effect of polyvinyl alcohol (PVA) was used to improve the performanc...

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Bibliographic Details
Published inAdvances in Civil Engineering Vol. 2020; no. 2020; pp. 1 - 9
Main Authors Shi, Guicai, Pan, Yutao, Sheng, Yanmin, Dai, Guo-zhong, Li, Shujin
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 2020
Hindawi
John Wiley & Sons, Inc
Hindawi Limited
Wiley
Subjects
Adsorption
Bentonite
Cement
Chemical oxygen demand
Civil engineering
Contaminants
Hydration
Landfill
Landfills
Leachates
Performance enhancement
Permeability
Physical properties
Pollution
Polymers
Polyvinyl alcohol
Refuse and refuse disposal
Slurries
Sodium
Soil contamination
Soil permeability
Specialty products
Surface water
China
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Summary:Soil-bentonite cutoff walls are usually used to contain the contaminants of landfills. The pumpability, permeability, and adsorption capability of the slurry are all crucial to the performance of the cutoff wall. In this study, the effect of polyvinyl alcohol (PVA) was used to improve the performance of bentonite slurry. A series of lab tests were conducted to evaluate the pumpability, permeability, and adsorption capacity with different concentrations of PVA treatment. Results show that the addition of PVA can increase the fluidity and pumpable period of slurry, which facilitates the casting and grouting during construction. The addition of PVA also helps to reduce the permeability coefficient of slurry and improve the adsorption capability which enhances the cutoff performance of the walls.
ISSN:1687-8086
1687-8094
DOI:10.1155/2020/7409520