INVESTIGATION ON EFFECTIVE USE OF CONCRETE USING IGCC SLAG IN MARINE ENVIRONMENT

Abstract

 Integrated coal gasification combined cycle (IGCC) is gathering attention because IGCC has high net thermal efficiency and superior environmental performance. In the power generation process of IGCC, coal gasification molten slag (IGCC slag) is generated as byproduct and the disposal cost of IGCC slag is high. Therefore, effective use of IGCC slag is required. In this research, it is focused on that coal fired power plants are located near the sea. If IGCC slag can be used for marine structures, transportation cost can be reduced and large amounts of IGCC slag can be consumed because volume of marine structures is relatively large.

 First, the chloride penetration resistance of concrete using IGCC slag was investigated by experiment. It was found that chloride penetration resistance is improved by using IGCC slag because concrete becomes denser with increase in the replacement ratio of IGCC slag. Next, the economical and environmental efficiency by using IGCC slag for marine structures is investigated by Data Envelopment Analysis. It is found that economical and environmental efficiency is improved by using IGCC slag and the effectiveness of using IGCC slag for marine structures was shown.