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Effect of wetting and drying cycles on microstructure of rock based on SEM

  • Xiaojie Yang
  • Jiamin WangEmail author
  • Chun ZhuEmail author
  • Manchao He
  • Yang Gao
Original Article
  • 102 Downloads

Abstract

To study the effect of periodic water circulation on rock mass, chlorite–amphibolite rocks from the slope of Nanfen open-pit iron mine in Liaoning province were chosen as the engineering samples and were investigated using uniaxial compressive experiment and scanning electron microscopy. The effect of different wetting and drying cycles on the mechanical properties and microstructure of the rocks was investigated. The characteristics of pore parameters from the SEM images were obtained by Image Pro Plus image processing software. The results show that with the increase in number of wetting and drying cycles, the uniaxial compressive strength of the rock decreases and the porosity increases significantly. The weakening of macroscopic mechanical properties of rocks is closely related to the changes in microstructures of rocks. The water–rock interaction changes the size, shape and porosity of the rock pores and then affects its mechanical properties. Based on the combination of macro and micro, quantitative analysis of the weakening process of rocks subjected to wet and dry cycles can provide a better reference index for evaluating the stability of geotechnical engineering.

Keywords

Scanning electron microscope Microstructure Wetting and drying cycle Image Pro Plus Pore characteristics 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (no. 41672347) and Natural Science Foundation of Beijing Municipality (no. 8142032). We also express our thanks to the reviewers for their time and effort to review this paper.

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Copyright information

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

Authors and Affiliations

  1. 1.State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyBeijingChina
  2. 2.School of Mechanics and Civil EngineeringChina University of Mining and TechnologyBeijingChina

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