碳酸化预养护钢渣制备大掺量钢渣水泥的研究  

Study on high carbonation precuring steel slag cement

作　　者：吴昊泽[1] 赵华磊[1] 谭文杰[1] 丁亮[1] 刘梅[1] 常钧[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《水泥工程》2009年第6期18-22,共5页Cement Engineering

基　　金：国家自然科学基金(50872043)资助项目;国家"十一.五"科技支撑计划(2006BAF02A24-6);山东省自然科学基金(Q2008F04);济南市科学技术发展计划重大专项(200808008)

摘　　要：应用碳酸化技术对比表面积为287m^2/kg的钢渣粗粉进行预养护,进行制备大掺量钢渣水泥的试验研究。实验结果表明:(1)钢渣粗粉在温度74℃,相对湿度70%～90%,CO_2气体浓度30%～40%的的条件下,碳酸化养护270min后其w(f-CaO)由5.67%降至0.34%;钢渣中的大部分f-CaO转化为CaCO_3晶体,而C_3S及C_2S基本未参与碳酸化反应。(2)由于碳酸化作用,钢渣中Ca的浸析浓度明显降低,钢渣的早期水化速度加快、早期水化活性提高。(3)应用碳酸化预养护后的钢渣粗粉制备的钢渣水泥,钢渣粗粉掺入量可达40%,3 d强度达20.6 MPa,28 d强度达44.7 MPa,并且压蒸安定性良好。Precured steel slag （specific surface is 287 m^2/kg） by carbonation technology and experimentally produced high steel slag cement. The results showed that when the temperature was 74 ℃, relative humidity was 70%-90% and the φ（CO2） was 30%-40%, w （f-CaO） in the steel slag decreased from 5.67% to 0.34% after 270 min carbonation curing, and most of the f-CaO transformed into CaCO3, C3S and C2S didn＇ t attend the carbonation reaction; as carbonation action, the separating concentration of Ca decreased obviously and the early hydration speed up with more activity; to produce cement with the carbonation precuring steel slag, the add per- centage could reach 40%, and 3 d,28 d compressive strength was 20.6 MPa and 44.7 MPa, and the compressive heat invariability was perfect.

关 键 词：钢渣粗粉 碳酸化 钢渣水泥 性能 

分 类 号：TQ172[化学工程—水泥工业]