关键词: 岩棉废料;炉渣;活性;孔结构

Abstract: In order to recycle the furnace slag which was produced during the rock wool production process,the slag was ground into powders of three different fineness and they were analyzed compared with rock wool powder,fly ash powder and granulated blast furnace slag powder(slag powder).The results show that the chemical composition of furnace slag is similar to that of fly ash.Vitreous content in slag is higher;besides there is a small amount of crystalline phase in the slag,and the degree of crystallinity of the slag is 5.28％.The activity of slag can be improved with the powder fineness increasing.The strength activity index of bottom powder with specific area 450 kg/m2 is about 10％higher than that of fly ash and it is lower than that of slag powder with the same fineness.The impermeability and frost resisitance of samples mixed with furnace slag powder are superior to samples mixed with fly ash powders and the two capacities are inferior to samples mixed with slag powders.Pore structure test result proves that porosity and the content of harmful pores of slag powder cement mortar are between those of slag powder cement mortar and fly ash powder cement.Furnace slag powders produced by grinding process have the feasibility of being mineral admixtures.

Key words: rock wool waste;furnace slag;activity;pore structure