| 膨润土在高碱环境中的反应变化特征 |
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| 引用本文： | 陈宝,陈萍.膨润土在高碱环境中的反应变化特征[J].低温建筑技术,2010,32(12):8-10. |
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| 作者姓名： | 陈宝 陈萍 |
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| 作者单位： | 1. 同济大学,岩土工程重点实验室,上海,200092;同济大学,地下建筑与工程系,上海,200092
2. 同济大学,地下建筑与工程系,上海,200092 |
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| 摘 要： | 膨润土具有高膨胀性、低渗透性以及优良的核素吸附能力,被选为高放废物处置库的缓冲回填材料。然而,作为处置库主要建造材料的混凝土会随着时间衰退分解产生高碱性溶解物,与地下水形成高碱性孔隙水,膨润土会与之反应,使得孔隙结构和性能发生较大的变化而影响处置库的封闭性。本文分析了膨润土和高碱性孔隙水的反应过程以及两者之间反应的主要影响因素,总结出高碱性环境中膨润土的反应变化特征。
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| 关 键 词： | 膨润土 高碱性孔隙水 膨胀性 渗透性 |
THE VARIATION OF BENTONITE SUBMITTED TO HYPER-ALKALINE ENVIRONMENT |
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| CHEN Bao,CHEN Ping.THE VARIATION OF BENTONITE SUBMITTED TO HYPER-ALKALINE ENVIRONMENT[J].Low Temperature Architecture Technology,2010,32(12):8-10. |
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| Authors: | CHEN Bao CHEN Ping |
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| Affiliation: | CHEN Bao1,2,CHEN Ping2(1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji Univ.,Shanghai 200092,China,2.Dept.of Geotechnical Engineering,China) |
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| Abstract: | Bentonite was chosen as the backfill and buffer material for high level radioactive waste in deep geological disposal,for its high swelling,low permeability and excellent radionuclide adsorption capacity.However,as the main construction material,concrete will decline over time,produce hyper-alkaline solute,and form hyper-alkaline porewater with underground water.Bentonite will react with the porewater,and lead to significant alteration in swelling,permeability and pore structure.The reaction between bentoni... |
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| Keywords: | bentonite hyper-alkaline porewater swelling permeability |
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