نتایج جستجو برای: beta calcium sulfate hemihydrate

تعداد نتایج: 402776  

Journal: :Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry 1972

Journal: :Materials 2023

Despite having a high early mechanical strength and using sulfoaluminate cement as the primary cementitious material, self-compacting repair mortar (SCRM) suffers from rapid hydration rates leading to construction time constraints. This study examined how several forms of calcium sulfate, including hemihydrate gypsum, anhydrite, dihydrate affected SCRM’s workability, process, microstructure. Th...

طاهری, مریم , غمامی , شهریار ,

In this research the α and β phases of hemihydrate have been prepared from Alamout natural gypsum and their setting times have been measured. The IR spectroscopy has been used for characterization of α and β phases of hemihydrate from gypsum. The α and β phases of hemihydrate distinguished from each other by X-ray powder diffraction (XRD). The setting times of pure α and β phases and mixtures o...

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