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《Concrete》 2015-12
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Morphology and enhancement effect of steel slag aggregate on mechanical properties of concrete

WU Fufei;CHEN Liangliang;CI Jun;SHI Kebin;LIU Sihai;WANG Xin;ZHANG Kai;College of Civil and Hydraulic Engineering,Xinjiang Agricultural University;  
In order to study the role of interface improving structure and mechanical properties of steel slag aggregate on concrete,concrete was prepared by steel slag aggregate to analyze enhancement effect and interface structure of C20,C50 and C80 concrete based on steel slag aggregate volume fraction. Results showthat porosity and aperture of coarse steel slag aggregate particles is large,a small amount of particles is honeycomb. Porosity and aperture of fine steel slag aggregates particles is relatively small,but they can still replace natural sand and stone to preparate concrete. Around of steel slag aggregate is relatively dense,interfacial area roughness is larger,even uneven surfaces at different depths is found in concrete. It can act as a"anchor"role in the large aperture or through the aperture. Compressive strength and anti-abrasion resistance is enhanced when steel slag is mixed to C20,C50 and C80 of concrete. It increases linearly between compressive strength and anti-abrasion resistance and the volume fraction of steel slag aggregate with the volume fraction of steel slag aggregate is increased. The lower the intensity,the greater the degree of intensity enhancement. The enhancement degree of C20,C50 and C80 concrete are 29.7%and 25.1%,23.0%and 12.9%,15.0%and 9.9%due to steel slag sand and stone,the enhancement degree of C20,C50 and C80 concrete with steel slag sand to steel slag stone are 1.18 times,1.78 times and 1.52 times,the enhancement degree of C80 to C50 are 88.6%and 94.8%when the volume fraction is 30%.
【Fund】: 新疆维吾尔自治区研究生科研创新项目资助(XJGRI2014072);; 新疆维吾尔自治区高校科研计划青年教师科研启动基金(XJEDU2013S09);; 新疆水利水电工程重点学科基金资助(XJzdxk-2010-02-12);; 国家高等学校博士点专项科研基金资助(20106504110005)
【CateGory Index】: TU528.041
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