Advertisement

Experimental Study on Water Absorption and Weakening of Silurian Argillite

  • Zhigang LiEmail author
  • Guangli XuEmail author
  • Xin Zhao
  • Yongpeng Fu
  • Chang Su
Original Paper
  • 12 Downloads

Abstract

The objective was to analyse the water absorption and weakening of a Silurian argillite taken from the northwest of Hubei Province, China. Some experiments were conducted including measurement of the change in water absorption, the microstructure of the minerals, the porosity, and the strength of argillite samples, at different water absorptions, by scanning electron microscope, powder X-ray diffraction analysis, and needle penetration test. The results indicate that argillite was soaked in water for up to 0.5 days, water absorption rates were fast and the amount absorbed was large. At the same time, the rate of strength decrease was high and significant loss of strength was observed. Argillite soaked in water for 0.5 to 180 days had an increased water absorption at a slower rate, and the strength tended to be stable over time. The relationship between strength and water absorption was established: the strength decreases in the form of negative exponential function with increasing water absorption. Finally, the micro-mechanical model shows that, the decrease of attractive force of mineral grains and the increase in the force acting between mineral grains and the pore water are the main reason why this degree of water-weakening appeared in the argillite.

Keywords

Silurian argillite Needle penetration test Water absorption Water-weakening 

Notes

Acknowledgements

The authors acknowledge the financial support provided by the National Natural Science Foundation of China (Grant Nos. 41472263 and 41772314) and China Geological Survey Project (No. 12120114038701).

References

  1. Aydan O, Sato A, Yagi M (2014) The inference of geo-mechanical properties of soft rocks and their degradation from needle penetration tests. Rock Mech Rock Eng 47:1867–1890CrossRefGoogle Scholar
  2. China Electricity Council (2013) Standard for testing method of engineering rock mass. China Planning Press, Beijing, p 9Google Scholar
  3. Delage P, Schroeder C, Cui YJ (2008) Subsidence and capillary effects in chalks. arXiv arXiv:0803.1308
  4. Duan HF, Jiang ZQ, Zhu SY (2012) Micro-mechanism of water stability and characteristics of strength softening of rock in deep mines. Chin J Geotech Eng 34(9):1636–1645Google Scholar
  5. Erguler ZA, Ulusay R (2007) Estimation of uniaxial compressive strength of clay-bearing weak rocks using needle penetration response. In: Proceedings of 11th congress on international society rock mechanics, Lisbon, vol 1, pp 265–268Google Scholar
  6. Erguler ZA, Ulusay R (2009) Water-induced variations in mechanical properties of clay-bearing rocks. Int J Rock Mech Min Sci 46(2):355–370CrossRefGoogle Scholar
  7. Hadizadeh J, Law RD (1991) Water-weakening of sandstone and quartzite deformed at various stress and strain rates. Int J Rock Mech Min Sci Geomech Abstr 28(5):431–439CrossRefGoogle Scholar
  8. JGS (Japanese Geotechnical Society) (2012) Japanese standards and explanations of geotechnical and geoenvironmental investigation methods. JGS Publication, Tokyo, pp 426–432 (in Japanese) Google Scholar
  9. JSCE (Japan Society of Civil Engineers) (1991) A suggested method for investigation and testing of soft rocks. Committee on Rock Mechanics of JSCE, Japan, pp 124 (in Japanese) Google Scholar
  10. Mao HJ, Yang CH, Huang XL (2006) Experimental study and theoretical analysis of slates under different saturated conditions. Rock Soil Mech 27(9):1638–1642Google Scholar
  11. Newman GH (1983) The effect of water chemistry on the laboratory compression and permeability characteristics of some North Sea chalks. J Petrol Technol 35(05):976–980CrossRefGoogle Scholar
  12. Ngan-Tillard DJM, Engin HK, Verwaal W (2012) Evaluation of micro-structural damage caused by needle penetration testing. Bull Eng Geol Environ 71:487–498CrossRefGoogle Scholar
  13. Török Á, Vásárhelyi B (2010) The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Eng Geol 115(3–4):237–245CrossRefGoogle Scholar
  14. Ulusay R, Erguler ZA (2012) Needle penetration test: evaluation of its performance and possible uses in predicting strength of weak and soft rocks. Eng Geol 149–150:47–56CrossRefGoogle Scholar
  15. Ulusay R, Aydan O, Erguler ZA (2014) ISRM suggested method for the needle penetration test. Rock Mech Rock Eng 47:1073–1085CrossRefGoogle Scholar
  16. Vásárhelyi B, Ván P (2006) Influence of water content on the strength of rock. Eng Geol 84(1–2):70–74CrossRefGoogle Scholar
  17. Wang YS, Wu JF, Wei P (2009) Research on time effect of rock weakening by water-rock interaction of redbeds in Sichuan Basin. Chin J Rock Mech Eng 28(Supp. 1):3102–3108Google Scholar
  18. Xu LH, Liu SM, Li YQ (2008) Experimental studies on rock softening properties in Danjiangkou Reservoir area. Rock Soil Mech 29(5):1430–1434Google Scholar
  19. Yang CH, Mao HJ, Wang XC (2006) Study on variation of microstructure and mechanical properties of water-weakening slates. Rock Soil Mech 27(12):2090–2098Google Scholar
  20. Zhou CY, Deng YM, Tan XS (2005) Experimental research on the softening of mechanical properties of saturated soft rocks and application. Chin J Rock Mech Eng 24(1):34–38CrossRefGoogle Scholar
  21. Zhu XJ (1997) Dilation soften rocks. Technol Miner Sci 1:26–33Google Scholar
  22. Zuo QJ, Wu L, Bian YS (2014) Research on time effect of mechanical parameters deterioration for surrounding rock in water-rich slate tunnel. Chin J Undergr Space Eng 10(6):1353–1360Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.College of Civil Science and EngineeringYangzhou UniversityYangzhouChina
  2. 2.Faculty of EngineeringChina University of GeosciencesWuhanChina
  3. 3.Geological Survey Center in Wuhan, China Geological SurveyWuhanChina
  4. 4.Hubei Institute of Hydrogeology and Engineering GeologyJingzhouChina

Personalised recommendations