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Preparation and Application of CSA Expansive Additives Using Industrial Wastes
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 Title & Authors
Preparation and Application of CSA Expansive Additives Using Industrial Wastes
Yoon Sung-Won; Rho Jae-Seong;
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Calcium sulfoalumiante(CSA) was prepared for using natural calcite() and industrial by-products and wastes, such as . The mixture of raw materials was fired at 20, 400, 600, for 1h and cooled rapidly in air. The cement replaced by expansive additives was investigated by the measurement of the hydration products and compressive strength, setting time, expansion at wet curing condition. was found in x-ray diffraction pattern over the temperature . The setting time or the cement pastes added clinkers fired at different temperature was shorter than ordinary portland cement. The compressive strength was higher than the ordinary portland cement about . The mainly hydration products were ettringite, and . The expansion due to the formation of ettringite during hydration decreased the drying shrinkage of hardened cement rather than the ordinary portland cement.
C;CSA expansive additives;drying shrinkage;industrial wastes;
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