Arabian Journal of Geosciences

, 12:586 | Cite as

Experimental investigation on the mechanical behavior of red sandstone under the coupled effects of temperature and acidic etching

  • Guansheng Han
  • Hongwen JingEmail author
  • Richeng Liu
  • Haijian Su
  • Jiangyu Wu
  • Junjie Wei
Original Paper


The red sandstone that commonly exists in nature is used to study the coupled effects of temperature and acidic etching on its mechanical properties. The dry-wet cycle is adopted to accelerate the corrosion process during the test, and the increase in the number of dry-wet cycle indicates the increase of the degree of corrosion. A series of uniaxial compression tests were carried out, and the influence of dry-wet cycle times on the physical and mechanical properties of red sandstones was analyzed. Besides, the crack propagation, phase composition, and the micromorphology of red sandstone were analyzed by means of acoustic emission (AE), X-ray diffraction (XRD), and scanning electron microscope (SEM). The results show that the physical and mechanical parameters of red sandstone such as the P-wave velocity and the uniaxial compressive strength have been deteriorated in different degrees considering coupled effects of temperature and acidic etching. With the increase of the number of dry-wet cycle times, the elastic deformation section of the axial stress-strain curve of the specimen becomes shorter and the softening characteristic is gradually obvious. The evolution of AE is a good evidence for the changes of internal structure of the specimen due to the coupled effects of temperature and acidic etching. The results of the XRD and the SEM indicate that the species of minerals increase and the microstructures of the specimen were changed with the increase in the number of dry-wet cycles.


Rock mechanics Acidic etching Dry-wet cycle Acoustic emission Microstructure 


Funding information

This study is supported by the National Natural Science Foundation of China (Grant Nos. 51734009, 51709260, 51979272), Natural Science Foundation of Jiangsu Province, China (No. BK20180663), and the Innovation Training Program for College Students (No. 201810290039X).


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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  • Guansheng Han
    • 1
  • Hongwen Jing
    • 1
    Email author
  • Richeng Liu
    • 1
  • Haijian Su
    • 1
  • Jiangyu Wu
    • 1
  • Junjie Wei
    • 1
  1. 1.State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyXuzhouChina

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