人工鱼礁用钢渣混凝土胶凝材料的水化特性  

Hydration Characteristic of Cementitious Material of Steel Slag Concrete Used for Artificial Reefs

作　　者：王中杰[1] 倪文[1] 高术杰[1] 祝丽萍[1] 乔春雨[1] 

机构地区：[1]北京科技大学土木与环境工程学院

出　　处：《金属矿山》2012年第6期156-159,共4页Metal Mine

基　　金：国家海洋局海洋公益性行业科研专项经费重点项目(编号:200805030)

摘　　要：以鞍钢-0.088 mm热闷法钢渣和鞍钢高炉矿渣为胶凝材料的主要组分,以鞍钢0.088～19 mm热闷法钢渣为骨料,制备出了具有较高强度的人工鱼礁用钢渣混凝土。通过X射线衍射分析、场发射扫描电镜分析、差热分析和红外吸收光谱分析对胶凝材料的水化特性进行研究,结果表明:该胶凝材料在水化初期生成大量低碱度水化硅酸钙凝胶和少量钙矾石,水化硅酸钙凝胶是混凝土早期强度的主要来源;而随着水化进程的延续,水化硅酸钙凝胶的继续发展和不断增多、长大的钙矾石对体系空隙的充填则共同使混凝土的后期强度得到进一步的提高。An Artificial reef characterized by its high strength was prepared. Its cementitious material is composed of -0. 088 mm steel slag stabilized by a hot-simmering method and blast furnace slag from Ansteel company; its fine and coarse aggregates are also steel slag stabilized by a hot-simmering method with sizes from 0. 088 mm to 19 mm. By analyses of X-ray diffraction, field emission scanning electron microscope, differential thermal and infrared absorption spectrum for the hydration characteristic of the cementitious material, it can be found that a large amount of calcium silicate hydrate which mainly contributes to the early strength characterized by its low-alkalinity and a small amount of ettringte are both formed at early hydration stage. With the development of the hydration process, the calcium silicate hydrate and ettringite which is filling in the gaps of the hydration system are increasing continually. Therefore, the long-term strength can be improved by calcium silicate hydrate and ettringite.

关 键 词：人工鱼礁 钢渣混凝土 胶凝材料 水化特性 水化硅酸钙 钙矾石 

分 类 号：TQ172.781[化学工程—水泥工业]