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Bulletin of Engineering Geology and the Environment

, Volume 78, Issue 8, pp 5991–6002 | Cite as

Damage evolution behavior and constitutive model of sandstone subjected to chemical corrosion

  • Yun Lin
  • Keping ZhouEmail author
  • Feng Gao
  • Jielin Li
Original Paper

Abstract

Chemical corrosion has significant impact on the properties of rock materials. To investigate the effect of chemical corrosion on the porosity and mechanical properties of sandstones, the nuclear magnetic resonance (NMR) technique was used for the measurement of porosity. Uniaxial compression tests were then conducted for rock specimens treated with chemical corrosions. The test results showed that, compared with the rock specimens in their natural state, after chemical corrosions, the porosity increased, the uniaxial compressive strength and elastic modulus of sandstone both decreased, but the corresponding peak strain increased. A chemical damage variable derived from the change of porosity and the effective bearing area of rock samples was proposed. Based on the chemical damage variable, the corrosion order of different chemical solutions on sandstone was obtained as H2SO4 > NaOH > distilled water. The mechanism of chemical corrosion was also explored based on water-rock reactions. Finally, by introducing the compaction coefficient, an improved statistical damage constitutive model was established to describe the damage evolution of the sandstones treated with different chemical corrosions.

Keywords

Chemical corrosion Porosity Chemical damage variable Compaction coefficient Damage constitutive model 

Notes

Acknowledgments

The research presented in this paper was jointly supported by the National Natural Science Foundation of China (grant no. 51774323 and no. 41502327), the Fundamental Research Funds Project for the Central South University (grant no.2016zzts095), and the Open-End Fund for the Valuable and Precision Instruments of Central South University (grant no. CSUZC201801). The first author would like to thank the Chinese Scholarship Council for financial support to the joint PhD studies at the University of Adelaide.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Resource and Safety EngineeringCentral South UniversityChangshaChina
  2. 2.School of Civil, Environmental and Mining EngineeringUniversity of AdelaideAdelaideAustralia

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