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| Deformation of a pore induced by crystallization during cooling process |
| YING Sai1，2，ZHOU Fengxi1，WEN Tao2，CAO Yapeng3 |
| (1. School of Civil Engineering，Lanzhou University of Technology，Lanzhou，Gansu 730000，China；2. Engineering Research Center for Health Monitoring in Building Life Cycle and Disaster Prevention，Yangtze Normal University，Chongqing 408100，China；
3. State Key Laboratory of Frozen Soil Engineering，Northwest Institute of Eco-Environment and Resources，
Chinese Academy of Sciences，Lanzhou，Gansu 730000，China) |
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Abstract The pressure exerted on pore walls by growing salt crystals in salt weathering is a major cause of deformation and damage in porous materials. Crystal growth model in a pore during cooling process was provided. The treatment considered the interaction between crystals and pore walls which is based on kinetics of crystallization. Simulations and tests are carried out to analyze the deformation behaviors of a pore induced by salt heave under conditions of different salt contents，water contents and loads during cooling process. The results show that the deformation behaviors are subjected to volume of salt crystals，initial pore diameter and length-width ratio of salt crystals，and the volume of salt crystals is influenced by water and salt contents，and the loads induced an enhancement of length-width ratio of salt crystals. This model provides a new method for revealing the mechanism and calculating the deformation of salt heave in porous materials during cooling process.
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2020, Vol. 39 
