석탄재 지오폴리머의 환경영향 비교에 관한 연구

This study has been carried out to evaluate environmental values of a coal ash recycling technology and suggest directions for improving environmental performance of the recycling technology. As the results of comparing the global warming environmental impacts of 3 types of geopolymers produced by fly ash, middle ash, and bottom ash with the impact of portland cement, Fly ash geopolymer showed 19%, Middle ash geopolymer 51%, Bottom ash geopolymer showed 133% of the impact of portland cement. The impact of Bottom ash geopolymer can be improved by reducing water use and wastewater recycling. In the case of Fly ash geopolymer and Middle ash geopolymer, energy efficiency and sodium silicate input have been found as material factors. The limitation of this study is not to consider the value of new recycling material, additional burden of coal ash dumping, and low efficiency of small amount production of a development stage. It can be inferred that the actual environmental impact of geopolymers would be lower.