Investigation of solvent type on dissolution strength of gypsum foundations )Case study of Marash Dam)

Abstract

In the construction of dams, geotechnical and hydrological studies are one of the most important measures before the start of the project. The presence of gypsum and anhydrite in the foundations and supports of the axis under study, concerns such as the risk of irregular settlements, dissolution of the foundation and, by its nature, instability in the foundations and supports of the dam.Dissolution of sulfate rocks proceeds by different mechanisms and at different rates compared to the dissolution of carbonate rocks [1]. For each type of stone, different factors affect the dissolution process. One of these factors is the type of solvent and its chemical composition. In this study, by conducting experiments on gypsum materials, the solubility of four types of distilled water solution, distilled water solution With one percent sodium chloride, The water sample of Marash dam and municipal water has been measured and calculated on the mentioned materials. Finally, the obtained results show the difference in the solubility of gypsum in the sample of the mentioned solutions.