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Volume 38 Issue 7
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JU Xiao-dong, FENG Wen-juan, ZHANG Yu-jun, ZHAO Hong-bo. Crystallization stresses in brittle porous media[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(7): 1246-1253. DOI: 10.11779/CJGE201607011
Citation: JU Xiao-dong, FENG Wen-juan, ZHANG Yu-jun, ZHAO Hong-bo. Crystallization stresses in brittle porous media[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(7): 1246-1253. DOI: 10.11779/CJGE201607011
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Crystallization stresses in brittle porous media

  • 1. Civil Engineering School, Henan Polytechnic University, Jiaozuo 454000, China;
    2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

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  • Published Date: July 24, 2016
    Graphical Abstract
    • Abstract
  • The pore wall stress from crystallization of salts or water in rock materials is an important factor to induce weathering and freeze-thaw damage. The pore system of authentic materials is generalized into four kinds of interpenetrating independently ideal shapes as sphere, cylinder, ellipsoid and elliptic-cylinder. Then four types of heterogeneous pore system models are proposed based on the statistical distribution of quantity/volume of pores to their radii. Associated with the crystallization law of heterogeneous pore system, the theory of ideal shape pore crystallization stress and the average algorithm of crystallization stresses, the computing method and formulas for macro-level “average stress” derived from micro-level pore wall stresses of these four models are proposed. Finally, based on the crystallization progress of sodium chloride in heterogeneous spherical pore system, the evolution of macro-level triaxial “average stress” with invasion radius (corresponding to solution concentration of pore system) is discussed.
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    • References (24)
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