Soluble salt crystallization effect on the weathering of sandstone at the Shimao site
Source abstract
Abstract
Salt crystallization is one of major factors contributing to rock deterioration. In this study, the sandstone from the Shimao site was subjected to controlled salt crystallization cycles under conditions simulating in situ environments. Instead of the conventional 14% concentration specified in EN 12370, we used 5% solutions of Na₂SO₄, MgSO₄, and NaCl, with drying conducted at 70 °C. A series of physical parameters and mechanical properties were evaluated before and after the salt crystallization cycles. Repeated crystallization during the wet-dry cycles resulted in the development of pronounced weathering surface cracks, particularly in sulfate-treated samples. These were accompanied by cement loss and pore enlargement within the rock matrix. Among these salts, MgSO₄ caused the most severe damage, followed by Na₂SO₄ and NaCl. The findings emphasize that even at lower salt content, the occurrence of weathering, increased roughness, weight loss, the development of fissures and changes in uniaxial compressive strength can be detected.
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Research context
OpenAlex topics: Building materials and conservation · Concrete and Cement Materials Research · CO2 Sequestration and Geologic Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
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