Crystallization pressure of crystals in porous media

被引：0
|
作者：
Zhou F.-X. [1 ,2 ]
Ying S. [1 ,3 ]
Cai Y.-Q. [2 ]
机构：
[1] School of Civil Engineering, Lanzhou University of Technology, Lanzhou
[2] School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou
[3] Engineering Research Center for Health Monitoring in Building Life Cycle and Disaster Prevention, Yangtze Normal University, Chongqing
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2019年 / 41卷 / 06期
关键词：
Chemical potential; Crystallization pressure; Freezing point temperature; Porous medium;
D O I：
10.11779/CJGE201906021
中图分类号：
学科分类号：
摘要：
The pressure exerted by growing crystals of salts or water in porous materials is a major factor to induce deformation and freeze-thaw damage. Theoretical derivations for the crystallization pressure of salt crystals driven by supersaturation and ice crystals driven by temperatures are presented based on the chemical potentials of solutions and crystals, in which the ion interaction is taken into account. The models for the maximum crystallization pressure that the growing crystals in non-ideal solution exert on the pore walls are developed. The pressure from crystallization of salts and water as well as the freezing temperature for solutions of aqueous NaCl and Na2SO4 under different concentrations and temperatures are parametrically analyzed, respectively. The results show that for the salt crystals, the crystallization pressure is closely related to the ratio of supersaturation, solution activity and type of salt crystals; for the ice crystals, the crystallization pressure is related to the ambient temperature and solution activity. © 2019, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
引用
收藏
页码：1158 / 1163
页数：5
相关论文
共 18 条
  • [1] Espinosa R.M., Franke L., Deckelmann G., Phase changes of salts in porous materials: Crystallization, hydration and deliquescence, Construction & Building Materials, 22, 8, pp. 1758-1773, (2008)
  • [2] Gawin D., Koniorczyk M., Pesavento F., Modelling of hydro-thermo-chemo-mechanical phenomena in building materials, Bulletin of the Polish Academy of Sciences Technical Sciences, 61, 1, pp. 51-63, (2013)
  • [3] Castellazzi G., Miranda S.D., Grementieri L., Et al., Multiphase model for hygrothermal analysis of porous media with salt crystallization and hydration, Materials & Structures, 49, 3, pp. 1039-1063, (2016)
  • [4] Castellazzi G., De Miranda S., Grementieri L., Et al., Modelling of Non-Isothermal salt transport and crystallization in historic masonry, Key Engineering Materials, 624, pp. 222-229, (2015)
  • [5] Wu D., Lai Y., Zhang M., Thermo-hydro-salt-mechanical coupled model for saturated porous media based on crystallization kinetics, Cold Regions Science & Technology, 133, pp. 94-107, (2016)
  • [6] Lai Y., Wu D., Zhang M., Crystallization deformation of a saline soil during freezing and thawing processes, Applied Thermal Engineering, 120, pp. 463-473, (2017)
  • [7] Tang L., Nilsson L.O., Chloride binding capacity and binding isotherms of opc pastes and mortars, Cement & Concrete Research, 23, 2, pp. 247-253, (1993)
  • [8] Pel L., Huinink H., Kopinga K., Salt transport and crystallization in porous building materials, Magnetic Resonance Imaging, 21, 3, pp. 317-320, (2003)
  • [9] Lubelli B., Hees R.P.J.V., Groot C.J.W.P., Sodium chloride crystallization in a "salt transporting" restoration plaster, Cement & Concrete Research, 36, 8, pp. 1467-1474, (2006)
  • [10] Rijniers L.A., Huinink H.P., Pel L., Et al., Experimental evidence of crystallization pressure inside porous media, Physical Review Letters, 94, 7, (2005)
12