Experimental Study on Sandstone Freezing-Thawing Damage Properties under Condition of Water Chemistry

Author:

Deng Hong Wei1,Dong Chun Fang1,Li Jie Lin1,Zhou Ke Ping1,Tian Wei Gang1,Zhang Jian1

Affiliation:

1. Central South University

Abstract

For the purpose of researching the freezing-thawing cycle physical mechanics properties of sandstone in various chemical solutions, taking the red sandstones from Shandong as the example, freezing-thawing cycles experiments under the condition of H2SO4solution (pH≈1.5), NaOH solution (pH≈12.5), NaCl solution (pH≈7, mass fraction is 4%) and water were conducted. The nuclear magnetic resonance (NMR) technique was used to test the porosity of rock samples after freezing-thawing cycles. Brazilian splitting test was also conducted to test the samples with different times of freezing-thawing cycles and soaking solutions. Results show that the quality change of samples in various solutions is different. The mass of sample in water increased, however, the mass change of the sample in other three solutions showed a firstly increasing and then decreasing tendency. The porosity distribution in rock changed obviously after different time’s freezing-thawing cycles. After 30 times freezing-thawing cycles, the porosity in H2SO4solution, NaOH solution, NaCl solution and water has increased by 151.1%, 85.443%, 39.388%, and 17.976% respectively. With the increase of freezing-thawing cycle’s times, tensile strength of the rock reduced, but the damage properties were different in various solutions. The research can provide some mechanical parameters basis to physical mechanics properties of sandstones.

Publisher

Trans Tech Publications, Ltd.

Reference16 articles.

1. W. ZHAO. Rock Mechanics( Central South University Press, China 2010).

2. Kosortmillno. K., B. Niolenko and V. Nikitin, eds. Testing the strength of frozen on rock on samples of various forms( Increasing the effectiveness of mining Industry in YakutiaIn, Russian 1974).

3. Yamabe T and Neaupane K M: International Journal of Rock Mechanics and Mining Sciences, Vol. 38 (2001) No. 7, pp.1029-1034.

4. Del Roa L M, Lopez F, Esteban F J, et al: 2005 IEEE Ultrasonics Symposium(2005), Vol. 1, pp.415-418.

5. G.S. Yang and Y.B. Pu: Journal of China Coal and Society, Vol. 27 (2002) No. 4, pp.357-362.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3