Grey correlation analysis on the effect of slag particle size distribution on the compressive strength of cementitious binder consisting of high-volume blast furnace slag and steel slag
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摘要: 為了能夠更好地大量利用礦渣、鋼渣制備高強建筑材料,實驗采用灰色關聯分析方法研究了礦渣、鋼渣的粒度分布對大摻量礦渣、鋼渣膠凝體系抗壓強度的影響.礦渣和鋼渣摻量分別占膠凝材料總質量的50%和30%,水膠比為0.34.研究表明:粒度小于8.39μm的礦渣、鋼渣顆粒對其膠凝體系3 d和28 d抗壓強度均起到增強作用,大于8.39μm的礦渣、鋼渣顆粒對抗壓強度起到削弱作用.為了提高大摻量礦渣、鋼渣膠凝體系28d抗壓強度,應當主要增加5.03~8.39μm礦渣、鋼渣顆粒數量.Abstract: In order to improve the utilization of blast furnace slag and steel slag into high strength building materials to great extent, the effect of slag particle size on the compressive strength of cementitious systems prepared with a great deal of blast furnace and steel slag was investigated by grey correlation analysis. The blast furnace slag and steel slag account for 50% and 30% in mass respectively with the water-binder ratio of 0.34. Slag particles of less than 8.39 μm in size can contribute to the 3 d and 28 d compressive strengths, but the particles of more than 8.39 μm in size have negative effect on them. It is indicated that slag particles with the size between 5.03 μm and 8.39 μm should be increased in the cementitious system so as to improve the 28 d compressive strength.
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