矿渣-钢渣发泡混凝土的制备及反应机理  

Fabrication and Formation Mechanism of Foamed Iron Slag-Steel Slag Concrete

作　　者：陈伟[1] 倪文[1] 黄迪[2] 李倩[1] 吴志豪[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京中冶设备研究设计总院有限公司,北京100029

出　　处：《土木建筑与环境工程》2014年第4期98-103,共6页Journal of Civil,Architectural & Environment Engineering

摘　　要：为了实现高炉矿渣、转炉钢渣的高附加值综合利用,以水淬高炉矿渣和转炉钢渣为主要原料,加入少量的脱硫石膏、石灰和水泥熟料,通过铝粉发气制备发泡混凝土。测试了不同矿渣钢渣掺量制备的发泡混凝土制品3、7、28d的抗压强度和容重,并用扫描电子显微镜和X射线能谱仪分析了发泡混凝土制品养护过程中的水化产物和微观结构的变化。结果表明,钢渣掺量为30%、矿渣掺量为45%时,两者的协调性比较强,制品的抗压强度达到5.1MPa,绝干容重为625kg/m3;该凝胶体系中有钙矾石和C-S-H凝胶协同生成,且转炉钢渣的水硬活性明显低于水淬高炉矿渣。In order to achieve the comprehensive utilization of iron slag and steel slag, foamed concrete were prepared by adding small amount of gypsum, lime and clinker in steel slag-iron slag system and using aluminum powder as foaming agent,. The three day, seven-day and twenty-eight-day bulk density and compressive strength of foamed concrete with the different ratio of the main raw materials were researched. Furthermore, in order to research the hydration mechanism and microstructure of foamed concrete, the XRD and SEM images of the three productions of foamed concrete were analyzed. The results showed that the coordination of the dosage of steel slag and iron slag was better when the former was 30% and the latter was 45%, Meanwhile, the compressive strength was 5.1 MPa, the bulk density was 625 kg/m3 ;Ettringite and C--S--H gel synergies generated in steel slag-iron slag system. Besides, hydration activity of steel slag was obviously lower than that of iron slag.

关 键 词：矿渣 钢渣 发泡混凝土 水硬活性 钙矾石 

分 类 号：TU528.3[建筑科学—建筑技术科学]