Core-shell structured CaO aggregate prepared by granulating with Al chelating compound and its hydration resistance
Source abstract
Abstract
Abstract A preparation method of core-shell structured CaO aggregates and its hydration resistance were investigated in this paper. Ca(OH)2 granules were obtained by granulation method and then soaked in Al chelating compound (hereinafter called ACC) ethanol solution, after that Ca(OH)2 granules were fired at different temperatures. The obtained CaO granules were characterized by measurements of crystalline phase formation, bulk density, apparent porosity, hydration resistance, pore size distribution, cylindrical crushing strength and microstructural analysis. It can be seen from the results that core-shell structured CaO granules with excellent hydration resistance can be prepared after treated with ACC and a protective shell layer was found on the surface of the granules. The ACC promoted the liquid phase sintering of CaO granules, which led to the grain growth and increased the density of granules. CaO grains were bonded by the tricalcium aluminate (C3A) and the apparent porosity of the aggregate was reduced after heating, that decreased the contact area of CaO with water vapor.
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Research context
OpenAlex topics: Catalytic Processes in Materials Science · Magnesium Oxide Properties and Applications · Layered Double Hydroxides Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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