钢渣微粉-硅灰水泥基胶凝材料的水化机理研究  

Study on Hydration Mechanism of Steel Slag Powder-silica Fume Cement-based Cementitious Materials

作　　者：姚兆龙 马超 谢孟奇 石章入 贺祖浩 YAO Zhaolong;MA Chao;XIE Mengqi;SHI Zhangru;HE Zuhao(CCCC Second Harbour Engineering Company Ltd.,Wuhan 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430000,China;Key Laboratory of Large-Span Bridge Construction Technology,Wuhan 430415,China)

机构地区：[1]中交第二航务工程局,湖北武汉430040 [2]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430000 [3]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430415

出　　处：《金属矿山》2025年第3期278-285,共8页Metal Mine

摘　　要：为减轻钢渣对环境造成的负担,并提高其利用价值,将钢渣碾磨成细粉作为胶凝材料替代等量水泥,同时复掺硅灰,形成钢渣微粉-硅灰-水泥三元胶凝材料,对该材料胶砂体系的水化机理进行了研究。结果表明:钢渣微粉能有效抑制水泥基材料的早期水化放热,降低水化热速率峰值和放热总量,但早期强度出现下降。复掺硅灰后,可以利用其填充效应弥补早期强度损失,且硅灰的二次水化反应能明显改善砂浆的中后期强度。为进一步增强三元复合体系的早期强度,可以适当降低水胶比。当水胶比降至0.38时,早期放热速率峰值出现抬升,不利于材料的温升控制,但总体放热量保持稳定。水泥基材料复掺钢渣微粉和硅灰不仅可以改善其早期水化放热量,还具有优异的中后期强度值,且每立方米的碳排放量相较于纯水泥砂浆减少了17.1%~24.5%,节约能源12.4%~19.7%,实现了废弃钢渣的二次清洁开发利用。In order to reduce the burden of steel slag on the environment and improve its utilization value,steel slag was ground into fine powder as cementitious material to replace the same amount of cement.At the same time,silica fume was mixed to form steel slag powder-silica fume-cement ternary cementitious material.The hydration mechanism of the mortar system of the material was studied.The results showed that steel slag powder can effectively inhibit the early hydration heat release of cement-based materials,reduce the peak value of hydration heat rate and the total amount of heat release,but the early strength decreases.After added silica fume,the filling effect can be used to make up for the loss of early strength,and the secondary hydration reaction of silica fume can obviously improve the middle and late strength of mortar.In order to further enhance the early strength of the ternary composite system,the water-binder ratio can be appropriately reduced.When the waterbinder ratio drops to 0.38,the peak value of the early heat release rate rised,which was not conducive to the temperature rise control of the material,but the overall heat release remains stable.The cement-based material mixed with steel slag powder and silica fume can not only improved its early hydration heat,but also had excellent mid-late strength value.Compared with pure cement mortar,the carbon emission per cubic meter was reduced by 17.1%~24.5%,and the energy saving was 12.4%~19.7%.The secondary clean development and utilization of waste steel slag was realized.

关 键 词：钢渣微粉 硅灰 水胶比 早期放热 强度 水化进程 

分 类 号：TU528.041[建筑科学—建筑技术科学]