Research Progress and Application of Steel Slag Admixture in Concrete
Steel slag is a solid waste produced by the iron and steel industry in steelmaking,which is still not ef-fectively applied due to its low activation degree,poor abrasiveness and high content of free calcium oxide(free magnesium oxide).In this paper,the basic physical and chemical properties of steel slag are investigated,and through the analysis of the mineral composition and chemical composition of steel slag,it is found that it contains C3S and C2S with good crystallization degree,which makes the steel slag has the potential to be applied as con-crete admixture,and the effects of steel slag on concrete properties are discussed in detail,including the en-hancement of the mechanical properties of concrete,improvement of the workability and durability,and the ad-vantages and potential application value of steel slag as an admixture in concrete are pointed out.Finally,the fu-ture research direction of steel slag admixture in concrete is proposed,in order to provide a new idea for the com-prehensive utilization of steel slag in China.
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