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Effect Of Calcium Carbonate Fineness On Calcium Sulfoaluminate-Belite Cement, Yeonung Jeong, Craig Hargis, Sungchul Chun, Juhyuk Moon
Effect Of Calcium Carbonate Fineness On Calcium Sulfoaluminate-Belite Cement, Yeonung Jeong, Craig Hargis, Sungchul Chun, Juhyuk Moon
Craig Hargis
This study investigated the hydration characteristics and strength development of calcium
sulfoaluminate-belite (CSAB) cements incorporating calcium carbonate (CC) powders with various
particle size distributions and different gypsum amounts. In general, the CSAB hydration was
accelerated by the CC powder, but the acceleration and resulting strength improvement were
more effective with finer CC powder. Regardless of the fineness of the CC powder, it took part
in the hydration of CSAB cement, forming hemicarboaluminate and monocarboaluminate phases.
These hydration and nucleation effects compensated for the strength reduction from decreased
cementing components (i.e., dilution effect) when finer CC powders were used, while they …