Experimental Study on the Difference of Flow and Strength of Concrete Mortarunder Different Admixtures
In this paper,the fluidity difference and strength difference of concrete mortar under different admixtures were studied.The mixing amount of steel slag powder was 0,5%,10%,15%,20%,30%and 40%of the mass of cementing material to prepare concrete,and the difference of concrete performance was tested.The results show that when steel slag powder,mineral powder and fly ash are selected as the ad-mixture,the mechanical properties and fluidity of cement sand show a similar development trend,in which the steel slag powder content increa-ses gradually when it is below 20%,and decreases gradually when it is from 20%to 30%.When the early strength of concrete is 10%,it can reach the level of the control group,and when the age is 28 days,the steel slag powder content is 20%or less,and the strength will decrease when the content is increased.It is recommended that 10%～15%of steel slag powder be used to prepare steel slag concrete.
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