Numerical Simulation on Water Absorption by MX-80 Bentonite for Nuclear Waste Disposal

Guo Qing Cai; Hui Tian; Jian Li

doi:10.4028/www.scientific.net/AMM.490-491.78

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 490-491Numerical Simulation on Water Absorption by MX-80...

Numerical Simulation on Water Absorption by MX-80 Bentonite for Nuclear Waste Disposal

Abstract:

As a low permeability, high thermal conductivity and mechanical strength soil, bentonite has been widely used as buffer/backfill material for nuclear waste disposal. Underground water flow behavior in bentonite was studied in this paper. A numerical simulation was conducted to predict the water absorption test of MX-80 bentonite, which is worldwide known commercial material. ABAQUS was used for simulating the water flow in the soil column in which hydro-mechanical coupled model is taken into consideration. Darcys law and van Genuchten soil water retention curve model were used for water flow. Ideal elastic model, Drucker-Prager plastic model and wetting expansive model were taken to describe the stress-strain relations of the soil. Comparison between experimental and simulation results shows that the proposed numerical method is reasonable to predict the water flow in MX-80 bentonite.

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Periodical:

Applied Mechanics and Materials (Volumes 490-491)

Pages:

78-82

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.490-491.78

Citation:

Cite this paper

Online since:

January 2014

Authors:

Guo Qing Cai, Hui Tian, Jian Li

Keywords:

MX-80 Bentonite, Nuclear Waste Disposal, Numerical Simulation, Water Absorption

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