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Mortar-concrete admixture, cement composition containing the same, mortar composition and concrete composition, and method for producing mortar cured product and concrete cured product
Mortar-concrete admixture, cement composition containing the same, mortar composition and concrete composition, and method for producing mortar cured product and concrete cured product
PROBLEM TO BE SOLVED: To obtain sufficient demolding strength at an early stage under a curing condition of a temperature generally applied in steam curing without applying a special cement, and to improve the fluidity of a mortar composition and a concrete composition. Provided is an admixture that has a sufficiently small effect and can reduce the risk of alkali-silica reaction. SOLUTION: The admixture for mortar / concrete according to the present invention has a content of early-strength Portorand cement of 0% by mass or more and 45% by mass or less based on the total mass of the admixture, and has a plaster content. The content of sodium silicate is more than 0% by mass and less than 10% by mass, the content of aluminum sulfate is more than 0% by mass and less than 10% by mass, and the content of zeolite is 30% by mass or more and less than 80% by mass. It is more than 0% by mass and less than 10% by mass, and the content of silica fume is 12% by mass or more and 70% by mass or less. [Selection diagram] None
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