A BASIC STUDY ON APPLICATION OF GRANULATED COAL SLAG COLLECTED FROM INTEGRATED COAL GASFICATION COMBINED CYCLE SYSTEM TO FINE AGGREGATE FOR CONCRETE

In a current pulverized coal thermal power generation system, CO2 emission is larger than that of other fossil fuels, so the improvement of power generation efficiency becomes a most important issue. Integrated coal Gasification Combined Cycle (IGCC) has received a lot of attention in recent years. IGCC is basically different from conventional pulverized coal thermal power generation system, electricity is generated by combined cycle, it is said that IGCC is much more efficient than a normal coal-fired power plant. In this method, the coal after gasification is collected as not coal ash but slag. The slag has a tremendous amount of potential of effective use in a concrete field because of no hazardous components eluting and simplification of handling compared with coal ash. In this paper, using the IGCC slag, a series of mortar and concrete experiment is executed especially focusing on the influence of the amount of fine powder of slag and the mechanical characteristic of slag concrete. Based on the experiment results, it can be concluded that the IGCC slag has a quality to be applied to structural concrete.