Experimental study on thermal expansion properties of GMZ bentonite

CAO Sheng-fei; LIU Yue-miao; XIE Jing-li; YAN An; GAO Yu-feng; TONG Qiang

doi:10.11779/CJGE202202020

Volume 44 Issue 2

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2022 > 44(2): 377-383. > DOI: 10.11779/CJGE202202020

CAO Sheng-fei, LIU Yue-miao, XIE Jing-li, YAN An, GAO Yu-feng, TONG Qiang. Experimental study on thermal expansion properties of GMZ bentonite[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(2): 377-383. DOI: 10.11779/CJGE202202020

Citation:

PDF (1284 KB)

Experimental study on thermal expansion properties of GMZ bentonite

CAO Sheng-fei^{1, 2,},
LIU Yue-miao^{1, 2},
XIE Jing-li^{1, 2},
YAN An^{1, 2},
GAO Yu-feng^{1, 2},
TONG Qiang^{1, 2}

1.
CAEA Innovation Center on Geologicac Disposal of High Level Radioactive Waste, Beijing 100029, China
2.
CNNC Key Laboratory on Geological Disposal of High Level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing 100029, China

More Information

Received Date: May 25, 2021
Available Online: September 22, 2022

Graphical Abstract

Abstract

Abstract

Laboratory tests are conducted on the compacted Gaomiaozi (GMZ) bentonite by using the DIL 806 thermal dilatometer. The influences of different factors on the thermal expansion properties of the bentonite are systematically analyzed. The thermal expansion coefficient of the bentonite is obtained with the dry density, the heating rate, the water content and the atmosphere environment. The experimental results show that the coefficient of thermal expansion increases with the dry density of the bentonite. The coefficient of thermal expansion decreases with the increase of the initial water content. The coefficient of thermal expansion increases with the increase of the heating rate for the samples with high water content, and the coefficient of thermal expansion decreases with the increase of the heating rate for the drying bentonite. Under the same dry density and water content of the samples, the coefficient of thermal expansion is higher in the air environment than that in the Ar gas environment. The research results have certain reference for analyzing the thermal expansion properties of the bentonite and evaluating the long-term stability of buffer materials for high-level radioactive waste disposal.
- GMZ bentonite,
- coefficient of thermal expansion,
- dry density,
- water content,
- heating rate,
- atmosphere environment

FullText(HTML)

References (15)

References

[1]	王驹, 陈伟明, 苏锐, 等. 高放废物地质处置及其若干关键科学问题[J]. 岩石力学与工程学报, 2006, 25(4): 801–812. doi: 10.3321/j.issn:1000-6915.2006.04.015 WANG Ju, CHEN Wei-ming, SU Rui, et al. Geological disposal of high-level radioactive waste and its key scientific issues[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(4): 801–812. (in Chinese) doi: 10.3321/j.issn:1000-6915.2006.04.015
[2]	刘月妙, 徐国庆, 刘淑芬. 高放废物地质处置库缓冲/回填材料性能测定[J]. 辐射防护, 1998, 18(4): 290–295. https://www.cnki.com.cn/Article/CJFDTOTAL-FSFH804.004.htm LIU Yue-miao, XU Guo-qing, LIU Shu-fen. A study on buffer/backfill materials for hlw geological repository[J]. Radialization Protection, 1998, 18(4): 290–295. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-FSFH804.004.htm
[3]	操龙飞, 徐光, 邓鹏, 等. 钢的热膨胀特性研究[J]. 北京科技大学学报, 2014, 36(5): 639–643. https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201405011.htm CAO Long-fei, XU Guang, DENG Peng, et al. Study on thermal expansion properties of steels[J]. Journal of University of Science and Technology Beijing, 2014, 36(5): 639–643. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD201405011.htm
[4]	姚武, 郑欣. 配合比参数对混凝土热膨胀系数的影响[J]. 同济大学学报(自然科学版), 2007, 35(1): 77–81, 87. doi: 10.3321/j.issn:0253-374X.2007.01.016 YAO Wu, ZHENG Xin. Effect of mix proportion on coefficient of thermal expansion of concrete[J]. Journal of Tongji University (Natural Science), 2007, 35(1): 77–81, 87. (in Chinese) doi: 10.3321/j.issn:0253-374X.2007.01.016
[5]	陈薇, 杜红秀. 高温对C80高性能混凝土热膨胀性能及其微结构的影响[J]. 中国科技论文, 2017, 12(13): 1477–1481. doi: 10.3969/j.issn.2095-2783.2017.13.006 CHEN Wei, DU Hong-xiu. Effect of high temperature on thermal expansion and microstructure of C80 high performance concrete[J]. China Sciencepaper, 2017, 12(13): 1477–1481. (in Chinese) doi: 10.3969/j.issn.2095-2783.2017.13.006
[6]	刘海涛, 周辉, 胡大伟, 等. 含层理砂岩热膨胀系数的试验研究[J]. 岩土力学, 2017, 38(10): 2841–2846. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201710010.htm LIU Hai-tao, ZHOU Hui, HU Da-wei, et al. Experiment study of thermal expansion coefficient of sandstone with beddings[J]. Rock and Soil Mechanics, 2017, 38(10): 2841–2846. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201710010.htm
[7]	马占国, 唐芙蓉, 戚福周, 等. 高温砂岩热膨胀系数变化规律试验研究[J]. 采矿与安全工程学报, 2017, 34(1): 121–126. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201701019.htm MA Zhan-guo, TANG Fu-rong, QI Fu-zhou, et al. Experimental study on thermal expansion coefficient changing rule of sandstone under high temperature[J]. Journal of Mining & Safety Engineering, 2017, 34(1): 121–126. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201701019.htm
[8]	赵洪宝, 谌伦建. 石灰岩热膨胀特性试验研究[J]. 岩土力学, 2011, 32(6): 1725–1730. doi: 10.3969/j.issn.1000-7598.2011.06.022 ZHAO Hong-bao, CHEN Lun-jian. Experimental study of thermal expansion property of limestone[J]. Rock and Soil Mechanics, 2011, 32(6): 1725–1730. (in Chinese) doi: 10.3969/j.issn.1000-7598.2011.06.022
[9]	AKESSON U. Extensometer Measurement of the Coefficient of Thermal Expansion of Rock[R]. Stockholm: Swedish National Testing and Research Institute, 2004.
[10]	陈皓, 吕海波, 陈正汉. 高庙子膨润土在高温高压下的强度特性研究[J]. 岩土工程学报, 2018, 40(增刊1): 28–33. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2018S1006.htm CHEN Hao, LÜ Hai-bo, CHEN Zheng-han. Strength properties of GMZ bentonite under high temperatures and pressure[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S1): 28–33. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2018S1006.htm
[11]	刘俊新, 唐伟, 李军润, 等. 高温及碱性条件对高庙子钠基膨润土膨胀力的影响[J]. 岩土力学, 2021, 42(8): 2160–2172, 2184. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202108012.htm LIU Jun-xin, TANG Wei, LI Jun-run, et al. An experimental research on swelling pressure of GMZ Na-bentonite submitted to the strong alkali-heat environment[J]. Rock and Soil Mechanics, 2021, 42(8): 2160–2172, 2184. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202108012.htm
[12]	叶为民, 王琼, 潘虹, 等. 高压实高庙子膨润土的热传导性能[J]. 岩土工程学报, 2010, 32(6): 821–826. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006003.htm YE Wei-min, WANG Qiong, PAN Hong, et al. Thermal conductivity of compacted GMZ01 bentonite[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(6): 821–826. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006003.htm
[13]	谢敬礼, 马利科, 高玉峰, 等. 北山花岗岩岩屑-膨润土混合材料导热性能研究[J]. 岩土力学, 2018, 39(8): 2823–2828, 2843. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201808014.htm XIE Jing-li, MA Li-ke, GAO Yu-feng, et al. Thermal conductivity of mixtures of Beishan bentonite and crushed granite[J]. Rock and Soil Mechanics, 2018, 39(8): 2823–2828, 2843. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201808014.htm
[14]	谈云志, 李辉, 王培荣, 等. 膨润土受热作用后的水-力性能研究[J]. 岩土力学, 2019, 40(2): 489–496. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201902010.htm TAN Yun-zhi, LI Hui, WANG Pei-rong, et al. Hydro-mechanical performances of bentonite respond to heat-treated history[J]. Rock and Soil Mechanics, 2019, 40(2): 489–496. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201902010.htm
[15]	唐朝生, 崔玉军, TANG A H, 等. 土体干燥过程中的体积收缩变形特征[J]. 岩土工程学报, 2011, 33(8): 1271–1279. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201108023.htm TANG Chao-sheng, CUI Yu-jun, TANG A M, et al. Volumetric shrinkage characteristics of soil during drying[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(8): 1271–1279. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201108023.htm