Experimental investigation on gas permeability and diffusion of polyacrylamide-amended CCL

WEN Jia-ming; WAN Jia-lei; BI Yu-zhang; LI Ying-zhen; DU Yan-jun

doi:10.11779/CJGE2021S2016

Volume 43 Issue S2

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S2): 68-71. > DOI: 10.11779/CJGE2021S2016

WEN Jia-ming, WAN Jia-lei, BI Yu-zhang, LI Ying-zhen, DU Yan-jun. Experimental investigation on gas permeability and diffusion of polyacrylamide-amended CCL[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 68-71. DOI: 10.11779/CJGE2021S2016

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Experimental investigation on gas permeability and diffusion of polyacrylamide-amended CCL

Institute of Geotechnical Engineering, Southeast University, Nanjing 211189, China

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Received Date: August 15, 2021
Available Online: December 05, 2022

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Abstract

Abstract

A series of water retention tests, gas permeability and diffusion tests are conducted to investigate the water content, water loss rate, gas permeability K_p and gas diffusion coefficient D_p of CCL with different modified amounts of PAM. The results indicate that the water content increases with the increasing amount of PAM, the water loss rate exhibits an opposite trend, and the water retention performance is better than that of the ordinary agroforestry water-retaining agent with the dosage ranged from 0.8% to 1.0%. The gas permeability and gas diffusion coefficient decrease with the increasing amount of PAM. When the content increases from 0 to 1.0%, K_p decreases by about one order of magnitude, and D_p is 35% of the original one.
- compacted clay liner,
- polyacrylamide,
- gas barrier property,
- gas permeability,
- gas diffusion coefficient

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