Effects of Compound Mineral Admixture with Steel Slag on Durability of Concrete

Abstract:

A study was made of the carbonation,chloride ion penetration and alkali-aggregate reaction (AAR),frost-resistance and adiabatic temperature rise of concrete with compound mineral admixture(CMA) of steel slag,granulated blast furnace slag and fly ash.The result shows that the resistance to carbonation and chloride ion penetration and expansion caused by AAR of concrete can be improved obviously in comparison with ordinary concretes at the equal water/binder ratio by substituting CMA for cement at equal quality,and the frost-resistance of concrete decreases dramatically with CMA over 50%.The hydration heat of cementitious material,adiabatic temperature rising and the rising velocity decrease remarkably with CMA substitute for cement.