Geomechanics and Engineering

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Changes in bound water and microstructure during consolidation creep of Guilin red clay

  • Zhang, Dajin (Key Laboratory of Geotechnics of Guangxi, Guilin University of Technology) ;
  • Xiao, Guiyuan (Key Laboratory of Geotechnics of Guangxi, Guilin University of Technology) ;
  • Yin, Le (The Guangxi Zhuang Autonomous Region Company of China National Tobacco Corporation) ;
  • Xu, Guangli (School of Engineering, China University of Geosciences) ;
  • Wang, Jian (Key Laboratory of Geotechnics of Guangxi, Guilin University of Technology)
  • Received : 2022.06.11
  • Accepted : 2022.08.16
  • Published : 2022.09.10
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Abstract

Creep of soils has a significant impact on mechanical properties. The one-dimensional consolidation creep test, thermal analysis test, scanning electron microscope (SEM) test, and mercury compression test were performed on Guilin red clay to study the changes in bound water and microstructure during the creep process of Guilin red clay. According to the results of the tests, only free and weakly bound water is discharged during the creep of Guilin red clay. When the consolidation pressure p is in the 12.5-400.0 kPa range, it is primarily the discharge of free water; when the consolidation pressure p is in the 800.0-1600.0 kPa range, the weakly bound water is converted to free water and discharged. After consolidation creep, the microstructure of soil changes from granular overhead contact structure to flat sheet-like stacking structure, with a decrease in the number of large and medium pores, an increase in the number of small and micro pores, and a decrease in the fractal dimension of pores. The creep process of red clay is the discharge of weakly bound water as well as the compression of large pores into small pores and the transition of soil particles from loose to dense.

Keywords

Acknowledgement

The research described in this paper was financially Supported by National Natural Science Foundation of China (52169022); Hubei Natural Resources Science and Technology Project (ZRZY2022KJ17).

References

  1. An, R., Kong, L., Zhang, X. and Li, C. (2022), "Effects of dry-wet cycles on three-dimensional pore structure and permeability characteristics of granite residual soil using X-ray micro computed tomography", J. Rock Mech. Geotech. Eng., 14(3), 851-860. https://doi.org/10.1016/j.jrmge.2021.10.004.
  2. Bi, G., Ren, C., Xu, H. and Jiang, D. (2022), "Creep behavior of cohesive soils associated with different plasticity indexes", Environ. Earth Sci., 81(5), 1-9. https://doi.org/10.1007/s12665-022-10271-6.
  3. Chen, J.P., Yuan, J., Ye, L.Y. and Peng, Q.W. (2020), "Microstructure change of soft soil under consolidation creep", Sci. Technol. Eng., 20(10), 4087-4094. https://doi.org/10.3969/j.issn.1671-1815.2020.10.044.
  4. Dahhaoui, H., Belayachi, N., Zadjaoui, A. and Nishimura, T. (2022), "One-dimensional compression creep change under temperature and suction effects", Int. J. Geotech. Eng., 16(6), 670-681. https://doi.org/10.1080/19386362.2021.2025306.
  5. Gao, G.R. (2019), Modern Geotechnics, Beijing Science Press, Beijing, China.
  6. Ghiyas, S.M.R. and Bagheripour, M.H. (2020), "Stabilization of oily contaminated clay soils using new materials: Micro and macro structural investigation", Geomech. Eng., 20(3), 207-220. https://doi.org/10.12989/gae.2020.20.3.207.
  7. Guo, Y., Ni, W. and Liu, H. (2021), "Effects of dry density and water content on compressibility and shear strength of loess", Geomech. Eng., 24(5), 419-430. https://doi.org/10.12989/gae.2021.24.5.419.
  8. Ibrahim, N., Fayed, A.L., Ahmed, A. and Hammad, M.S. (2022), "Effect of vertical drains and preloading on the creep behavior of soft clay", Innov. Infrastr. Solut., 7(3), 1-12. https://doi.org/10.1007/s41062-022-00780-5.
  9. Jin, P., Zhen, W., Chen, B., Sun, D.a., Gao, Y. and Xiong, Y. (2021), "Effect of microstructure on water retention behavior of lateritic clay over a wide suction range", Geomech. Eng., 25(5), 417-428. https://doi.org/10.12989/gae.2021.25.5.417.
  10. Kaczmarek, L. and Dobak, P. (2017), "Contemporary overview of soil creep phenomenon", Contemp. Trend. Geosci., 6, 28-40. https://doi.org/10.1515/ctg-2017-0003.
  11. Kaczmarek, L.D., Dobak, P.J. and Kielbasinski, K. (2017), "Preliminary investigations of creep strain of Neogene clay from Warsaw in drained triaxial tests assisted by computed microtomography", Studia Geotechnica et Mechanica, 39(2), 35-49. https://doi.org/10.1515/sgem-2017-0014.
  12. Kamoun, J. and Bouassida, M. (2018), "Creep behavior of unsaturated cohesive soils subjected to various stress levels", Arab. J. Geosci., 11(4), https://doi.org/10.1007/s12517-12018-13399-12514.
  13. Karim, M.R., Manivannan, G., Gnanendran, C. and Lo, S.R. (2011), "Predicting the long-term performance of a geogrid-reinforced embankment on soft soil using two-dimensional finite element analysis", Can. Geotech. J., 48(5), 741-753. https://doi.org/10.1139/t10-104.
  14. Leoni, M., Karstunen, M. and Vermeer, P. (2008), "Anisotropic creep model for soft soils", Geotechnique, 58(3), 215-226. https://doi.org/10.1680/geot.2008.58.3.215.
  15. Li, J. and Kong, L. (2021), "Creep properties of expansive soils under triaxial drained conditions and its nonlinear constitutive model", Periodica Polytechnica Civil Eng., 65(4), 1269-1278. https://doi.org/10.3311/PPci.18406.
  16. Li, J.X., Wang, C.M. and Zhang, X.W. (2010), "Creep properties and micropore changes of soft soil under different drainage conditions", Rock Soil. Mech., 31(11), 3493-3498. https://doi.org/10.3969/j.issn.1000-7598.2010.11.023.
  17. Liingaard, M., Augustesen, A. and Lade, P.V. (2004), "Characterization of models for time-dependent behavior of soils", Int. J. Geomech., 4(3), 157-177. https://doi.org/10.1061/(ASCE)1532-3641(2004)4:3(157)
  18. Long, Z., Cheng, Y., Yang, G., Yang, D. and Xu, Y. (2021), "Study on triaxial creep test and constitutive model of compacted red clay", Int. J. Civil Eng., 19(5), 517-531. https://doi.org/10.1007/s40999-020-00572-x.
  19. Mesri, G., Febres-Cordero, E., Shields, D. and Castro, A. (1981), "Shear stress-strain-time behaviour of clays", Geotechnique, 31(4), 537-552. https://doi.org/10.1680/geot.1981.31.4.537.
  20. MWR (China) (2019), GB/T 50123-2019 Standard for Geotechnical Test Methods. China Planning Press, Beijing, China.
  21. Singh, A. and Mitchell, J.K. (1968), "General stress-strain-time function for soils", J. Mech. Found. Div., 94(1), 21-46. https://doi.org/10.1061/JSFEAQ.0001084.
  22. Tavenas, F., Leroueil, S., Rochelle, P.L. and Roy, M. (1978), "Creep behaviour of an undisturbed lightly overconsolidated clay", Can. Geotech. J., 15(3), 402-423. https://doi.org/10.1139/t78-037.
  23. Wu, F.C. (1984), "Some characteristics of adsorption-bound water measurements and seepage in clayey soils", Chin. J. Geotech. Eng., 6, 84-93.
  24. Xie, G., Deng, M.Y. and Zhang, L. (2013), "A study on the influence of electrolytes on clay bound water", Dril. Fluid Complet. Fluid., 30(6), 1-4.
  25. Zhang, Y., Sha, Y., Chen, J., Gao, B. and Wu, Z. (2019), "Experimental study on creep behavior of red clay of existing foundation in Guiyang City", Carsologica Sinica, 38(4), 627-634. https://doi.org/10.1016/j.virs.2023.05.009
  26. Zhu, W., Dai, G. and Gong, W. (2021), "Study on cyclic cumulative deformation characteristics and the equivalent cyclic creep model of soft clay", Math. Prob. Eng., 2021, Article ID 5588494. https://doi.org/10.1155/2021/5588494.