| abstract |
The present invention relates to HVMA (High Volume Mineral Admixtures) concrete in which the ratio of the admixture to the binder is increased. The present invention relates to an alkali stimulant for activating a pozzolan powder or a latent hydraulic powder used as an admixture of a concrete composition, And an HVMA concrete composition using the admixture. The present invention provides a composite material comprising a binder, water, a fine aggregate and a coarse aggregate, wherein the binder is composed of a mixture of Portland cement and an admixture, the admixture being formed of at least one of a pozzolan powder and a latent hydraulic powder, Wherein the alkali stimulant for HVMA in an aqueous solution containing 60 to 90 wt% of Na 3 PO 4 and 5 to 15 wt% of Na 3 PO 4 is added, and 0.025 to 0.05 wt% of Na 3 PO 4 is added to the binder HVMA concrete composition. |