Stability Of Steel Slag And Experimental Research On Steel Slag Coarse Aggregate Concrete

With the continuous development of industry， the industrial waste residuedischarge caused a series of problems：a large number of industrial waste residue pilenot only pollute the environment，has seriously affected the quality of people’s lives，but also to the industrial sector to increase the economic burden. As the concretecomposite technology mature with each passing day，the industrial waste slag asadmixture is mature day after day，but as a concrete coarse aggregate alternatives haveto be studied.According to the maximum utilization of steel slag on the principle，with steel slagstability test for premise，comparative study of different dosage of steel slag instead ofrubble stone concrete(steel slag coarse aggregate concrete)and ordinary gravel concrete（ordinary concrete）the macroscopic mechanical properties and durability，and the useof micro-hardnesstester and scanning electron microscopy on the steel slag cementstone and gravel and cement paste microstructure was analyzed.The tese results show that steel slag to replace the gravel：50%made of concrete，stability can meet the design requirements，in actual engineering，should be some useequivalent replace gravel；steel slag can improve the mechanical properties of concrete，combined with steel slag utilization on principle and mechanics performance，with50%volume is the best，the results of this study could be in the works in the application，canbring good economic benefits;at the same time，in addition to sulfate corrosion，slagadmixture can improve the durability of concrete of the other，in the practicalapplication of the process，should give take seriously;finally，through microscopic test： Gravel cement interfacial transition zone microstructure hardness is less than the steelslag cement and with a larger transition zone.