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- Title
Effects of Na<sub>2</sub>SO<sub>4</sub> concentration and surface shape on the weathering of granite during wet–dry cycling.
- Authors
Cao, Yuanpeng; Sun, Qiang; Wang, Shaofei; Ge, Zhenlong; Dong, Zhihao; Shi, Qingmin
- Abstract
The presence of salts during cyclic wet and dry conditions can cause weathering of rock and is the main cause of damage to ancient and modern buildings. Accordingly, salt weathering, especially of granite, has aroused great interest. Determining the relationship between wet–dry cycling and the physical properties of rock is of great significance to geotechnical engineering. In this paper, granite samples were processed into two shapes (round and semicircular) and subject to 0, 10, 20, 30, 40 and 50 wet–dry cycles, with the wetting achieved with 0%, 5%, 10% or 20% concentrations of Na2SO4 solution. The mass loss, roughness and indentation hardness of granite samples all changed to some extent with cycle number, with greater changes occurring at higher salt concentrations. Rock shape also affects the extent of weathering damage, as surface area and features such as corners facilitate the ingress of salt solution.
- Subjects
ROCK properties; GRANITE; SOLUTION (Chemistry); WEATHERING; GEOTECHNICAL engineering
- Publication
Environmental Earth Sciences, 2021, Vol 80, Issue 23, p1
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-021-10099-6