用首钢大石河铁尾矿制备蒸压加气混凝土  

Experimental Study on Preparation of Autoclaved Aerated Concrete with Iron Ore Tailings in Dashihe Iron Mine of Shougang

作　　者：王长龙[1,2,3] 梁庆[4] 王颜军[4] 倪文[1] 乔春雨[1] 

机构地区：[1]北京科技大学土木与环境学院 [2]金属矿山高效开采与安全教育部重点实验室 [3]河北工程大学土木工程学院 [4]首钢矿业公司大石河铁矿

出　　处：《金属矿山》2013年第2期160-163,168,共5页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA062405)

摘　　要：利用首钢大石河铁尾矿进行制备蒸压加气混凝土的试验研究,为该铁尾矿的资源化利用提供技术依据。结果表明,在铁尾矿磨矿细度为-0.08 mm占97.2%,4种原料铁尾矿、石灰、水泥、石膏的配比为60∶25∶10∶5,铝粉膏加入量为原料总量的0.06%,液固比为0.6,稳泡剂用量为总水量的8%,料浆浇注温度为50℃,静停养护温度和时间分别为60℃和4 h,蒸养压力、温度、时间分别为1.25 MPa、180℃、8 h的条件下,可制得强度等级为A3.5、密度等级为B06的蒸压加气混凝土。X射线衍射分析结果显示,制品中的主要物相是0.9、1.1、1.4 nm托贝莫来石及铁尾矿中的残留矿物。Experimental study on the preparation of autoclaved aerated concrete （AAC） with iron ore tailings from Dashihe iron mine of Shougang provides a technical basis for comprehensive utilization of iron ore tailings resources. The results showed that under conditions of grinding fineness of - 0. 08 mm 97.2% , the mixture ratio of iron ore tailings, lime, cement and gypsum at 60： 25： 10： 5, the amount of aluminum powder paste being 0. 06% of the total raw materials, liquidsolid ratio of 0. 6, the amount of foam stabilizer being 8% of the total volume of water, the slurry casting temperature at 50 ℃, the static curing temperature at 60 ℃ for 4 h, and steam curing pressure of 1.25 MPa at 180℃ for 8 h, the autoclaved aerated concrete with strength of A3.5, and density grade of B06 is obtained. X-ray diffraction analysis shows that the main phases in products are 0. 9,1.1,1.4 nm tobermorite and some residual minerals in iron tailings.

关 键 词：铁尾矿 蒸压加气混凝土 托贝莫来石 

分 类 号：TU522.32[建筑科学—建筑技术科学]