[1]刘志彬,王康达,刘松玉,等.冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响[J].东南大学学报(自然科学版),2015,45(5):964-968.[doi:10.3969/j.issn.1001-0505.2015.05.025]
 Liu Zhibin,Wang Kangda,Liu Songyu,et al.Influence of freeze-thaw cycles on particle size distribution and swell index of bentonite in geosynthetic clay liner[J].Journal of Southeast University (Natural Science Edition),2015,45(5):964-968.[doi:10.3969/j.issn.1001-0505.2015.05.025]
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冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第5期
页码:
964-968
栏目:
土木工程
出版日期:
2015-09-20

文章信息/Info

Title:
Influence of freeze-thaw cycles on particle size distribution and swell index of bentonite in geosynthetic clay liner
作者:
刘志彬12王康达12刘松玉12蔡均1郭易木1
1东南大学岩土工程研究所, 南京 210096; 2东南大学江苏省城市地下工程与环境安全重点实验室, 南京 210096
Author(s):
Liu Zhibin12 Wang Kangda12 Liu Songyu12 Cai Jun1 Guo Yimu1
1Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
2Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast University, Nanjing 210096, China
关键词:
土工织物膨润土垫 冻融循环 膨胀指数 主导粒径
Keywords:
geosynthetic clay liner freeze-thaw cycles swell index dominant particle size
分类号:
TU443
DOI:
10.3969/j.issn.1001-0505.2015.05.025
摘要:
为了解冻融循环对土工织物膨润土垫(GCL)材料中膨润土膨胀性的影响,通过室内试验研究了不同冻融循环次数下GCL材料中膨润土粒径分布及其膨胀指数的变化规律,分析了两者间内在联系,并阐述了膨胀指数变化的微观机理.试验结果表明:随着冻融循环次数的增加,膨胀指数先迅速增加至峰值后再略微下降并趋于平稳,粒径分布则趋于集中;10次以内冻融循环对GCL材料中膨润土膨胀指数影响较大.提出了主导粒径的概念,认为膨胀指数主要由属于主导粒径的颗粒决定,并给出了主导粒径与膨胀指数间的量化关系.
Abstract:
To analyze the influence of the freeze-thaw cycles on swelling of bentonite in geosynthetic clay liner(GCL), the variation of particle size distribution and the swell index of bentonite in GCL after different freeze-thaw cycles and their correlation were studied through laboratory experiments. The microscopic mechanism about the change of the swell index was demonstrated. The experimental results indicate that the swell index first increases rapidly to a peak value and then slightly decreases to a steady figure with the increase of the number of freeze-thaw cycles, which finally leads to the centralization of particle size distribution. The freeze-thaw cycles within 10 times have relatively greater influence on the swell index of bentonite in GCL. The concept of dominant particle size is put forward to characterize those particles which dominate the swell index of bentonite. The quantitative relationship between the dominant particle size and the swell index is also given.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2015-03-05.
作者简介: 刘志彬(1976—),男,博士,副教授,seulzb@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(41272311, 41330641).
引用本文: 刘志彬,王康达,刘松玉,等.冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响[J].东南大学学报:自然科学版,2015,45(5):964-968. [doi:10.3969/j.issn.1001-0505.2015.05.025]
更新日期/Last Update: 2015-09-20