崔孝炜,狄燕清,徐朝阳
掺钢渣粉尾矿高性能混凝土的制备
崔孝炜,狄燕清,徐朝阳
摘 要:研究了钢渣粉掺量和养护方式对全固废混凝土抗压强度的影响,并通过SEM分析了掺钢渣胶凝材料水化产物微观形貌。研究结果表明,钢渣粉掺量对混凝土的抗压强度有较大影响,湿热养护能够有效激发钢渣的活性,提高胶凝材料早期强度。掺入20%钢渣粉,采用56℃湿热养护,可以制备出28d抗压强度达77.26MPa的混凝土。掺入钢渣粉对水化产物种类不会造成影响,在反应的中后期,体系中C-S-H凝胶和钙矾石的协同生成能够促进体系强度的增长。
Abstract: The effect of steel slag powder proportion and curing process on compressive strength of solid waste concrete was investigated. The microstructure of hydration products was analyzed by SEM. The results showed that, steel slag content has great influence on the compressive strength of concrete. Steam curing can effectively stimulate the activity of steel slag and improve the early strength of gelling material. Mixed with 20% steel slag, curing at 56℃, the compressive strength of the concrete can achieve 77.26MPa at 28d. The addition of steel slag power has no effect on the type of hydration, the coordinated growth of the ettringite and C-S-H gel is significant for the strength of system in the middle and late stage of the reaction.
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