Admixture for enhancing mineral carbonation of concrete, and concrete mineral carbonation method using same

Abstract

The present invention relates to an admixture for enhancing the mineral carbonation of concrete, and a concrete mineral carbonation method using same. The admixture for enhancing the mineral carbonation of concrete, of the present invention, is a first agent, which comprises cement, an aggregate and water, and a second agent, which is composed of an alkanolamine-based compound, that are sequentially injected during in-situ CO mixing, wherein the alkanolamine-based compound captures and dissociates CO2 and stably induces CaCO3 precipitation, and thus can maximize CO2 mineralization and storage, wherein the injection timepoint and amount of the alkanolamine-based compound are optimized in the concrete mineral carbonization method, maximizing the CO2 adsorption amount in a mixing step, and the rate of hydration is controlled such that fluidity is ensured and sufficient compressive strength is expressed, and thus the present invention can be applied to cement-based construction materials such as mortar / remitar / ready-mix concrete / concrete secondary products.