LOW-SHRINKAGE AND LOW-CARBON GREEN CEMENT COMPOSITION COMPRISING CARBON-MINERALIZED FLY ASH AND EARLY STRENGTH TYPE EXPANSION AGENT, AND CONCRETE HAVING SAME APPLIED THERETO

摘要

One embodiment of the present invention provides a green cement composition comprising Portland cement, carbon minerals, an early strength type expansion agent, and blast furnace slag micropowder. In one embodiment of the present invention: carbon minerals obtained by reacting carbon dioxide, which is a main cause of greenhouse gas, with cogeneration plant fly ash are used, and thus the green cement composition has an effect of better reducing the amount of carbon dioxide than a conventional green cement, which has a simple mixture of fly ash and blast furnace slag micropowder; the cogeneration plant fly ash, which was restricted when used as a concrete admixture because of a high content of free lime, can be effectively utilized; and early strength deterioration and drying shrinkage, which are problems of the conventional green cement, are reduced using the early strength type expansion agent.