The couplings of rock/carbonate groundwater/cement leachate

Author:

Chen Junjie1,Chen Xiaohui1ORCID,Wang Manhui2,Thornton Steve3,Wang Yueyang1,Ma Yue1

Affiliation:

1. School of Civil Engineering, University of Leeds, Leeds, UK

2. Computing Services Department, University of Liverpool, Liverpool, UK

3. Groundwater Protection and Restoration Group, Department of Civil and Structural Engineering, University of Sheffield, Sheffield, UK

Abstract

Hyper-alkaline cement leachates generated from the cement buffer of a nuclear waste disposal site have significant influences on the mineralogy of the host rock, creating a chemically disturbed zone (CDZ). Three major types of cement leachates are formed during the evolution process. Most of the existing scenario modelling research has been focused on the influence of the cement leachate on the host rock. However, the influence of the groundwater in the host rock on the evolution of the CDZ remains unexplored. This paper presents a numerical scenario modelling of the couplings among carbonate groundwater, cement leachates and rock minerals. The results reveal that the high-carbonate groundwater significantly affects the precipitation of calcium silicate hydrate and calcite and consequently alters the physical and chemical properties of the host rock. This finding provides an essential guide for the selection of the location of a geological disposal facility in terms of groundwater chemistry.

Publisher

Thomas Telford Ltd.

Subject

Management, Monitoring, Policy and Law,Nature and Landscape Conservation,Geochemistry and Petrology,Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Editorial;Environmental Geotechnics;2020-10

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