低活性钢渣在地面用水泥基自流平砂浆中的应用研究

Research on Application of Cement-based Self-leveling Floor Mortar Using Low Active Steel Slag

低活性钢渣经破碎、筛分和研磨处理后制得钢渣砂和钢渣粉,将钢渣砂和钢渣粉分别作为地面用水泥基自流平砂浆中的细骨料和填料,研究其对水泥基自流平砂浆流动度、耐磨性及抗折抗压强度等性能的影响。研究结果表明:用钢渣砂/钢渣粉制备的水泥基自流平砂浆与用天然石英砂/重钙粉制备的砂浆相比,前者具有后期强度高、耐磨性能好、表面不易粉化及生产成本低等优点,其28 d及3 month的抗压强度最高分别提高了6.4%和24.2%,耐磨性最大提高了48.5%。用钢渣砂和钢渣粉制备的水泥基自流平砂浆的其他各项指标均符合JC/T 985-2005标准规定的技术要求。

Steel slag sand and steel slag powder are prepared by crushing,sieving and grinding of low active steel slag.The slag sand and the steel slag powder were used as the fine aggregate and the filler of the cement-based self-leveling floor mortar respectively.The influence of the steel slag sand and the steel slag powder on the fluidity,abrasion resistance,flexural and compressive strength of the cement-based self-leveling floor mortar were studied.The research results show that comparing the cement-based self-leveling floor mortar prepared with steel slag sand/steel slag powder and natural quartz sand/heavy calcium powder,the former has higher late strength,better abrasion resistance,higher surface toughness,and lower production cost,etc.The compressive strengths of the former were increased 6.4% and 24.2% at 28 d and 3 month respectively,and its abrasion resistance increased by a maximum of 48.5%.All other indexes of cement-based self-leveling floor mortar prepared with steel slag sand and steel slag powder can meet the technical requirements specified in the JC/T 985-2005 standard.