蒸养制度对铁尾矿加气混凝土强度的影响  

Effect of Steam Curing System on Properties of Aerated Concrete Made of Iron Tailings

作　　者：龚威[1] 丁向群[1] 冀言亮[1] 沈洁[1] 董越[1] 张冷庆[1] 

机构地区：[1]沈阳建筑大学科学与工程学院,沈阳110168

出　　处：《硅酸盐通报》2014年第1期43-47,共5页Bulletin of the Chinese Ceramic Society

基　　金："十二五"国家科技计划项目(2012ZX07202-008);国家自然科学基金(51078241);国家建筑材料行业科技创新计划(2013-M3-8)

摘　　要：以铁尾矿作为硅质原料,水泥、石灰为钙质原料,添加发泡剂、调节剂等制备加气混凝土,研究蒸养制度对制备材料的抗压强度的影响,并利用XRD和SEM等方法分析材料的结构特征。研究表明:蒸养温度、蒸养时间是影响制备材料抗压强度的主要因素。在蒸养温度为180℃,蒸养时间为8 h的条件下,制备材料的密度为705 kg/m3,强度可达8.52 MPa,XRD和SEM分析表明其主要晶相是CSH和托贝莫来石,纤维状的CSH与片状托贝莫来石相互交织,紧密结合。By adding foaming agent and regulator, the aerated concrete was manufactured with iron tailings （ siliceous material）, cement, lime （ calcium material）, and the effect of process of properties on the properties of this material such as compressive strength was studied and the structural characteristics of the material was analyzed by XRD and SEM in this paper. The results showed that steam-curing temperature and steam curing time were the main factors which strongly influence the compressive strength of aerated concrete. On the conditions that keeping the steam-curing temperature at 180 Celsius degrees and the steam curing time of 8 h, the density of material could reduce to 705 kg/m3, meanwhile, the compressive strength of the aerated concrete was higher than others which could reach at the strength of 8.52 MPa. By XRD method, the constitution of the aerated concrete was analyzed, in which the content was the primarily crystal phase of CSH and tobermorite stone and the SEM images of the aerated material indicated that the fiber intersections and seamless integration between the CSH and the flake tobermorite stone.

关 键 词：铁尾矿 加气混凝土 蒸养制度 

分 类 号：TU528[建筑科学—建筑技术科学]