摘要
以低硅铁尾矿作为主要原料,铝粉作为发气剂,成功制备出了符合GB/T 11968—2006的A3.5,B06级加气混凝土制品。考虑最大限度使用铁尾矿的情况下,铁尾矿、硅砂、石灰、水泥和脱硫石膏的最优化配合比(质量比)为40∶20∶25∶10∶5,铝粉加入量为0.057%,水料比为0.57,静停养护温度为70℃,加气混凝土制品的抗压强度达到4.11 MPa,此时体积密度为590 kg/m3,比强度为6.97 MPa。由X射线衍射测试分析可知,成品中主要的矿物成分为托贝莫来石,此外还有硬石膏和残留的石英等。扫描电镜和能谱分析结果显示,成品中形成了CSH和托贝莫来石相互交织的网状结构,有效的提高了加气混凝土的强度。
The samples of aerated concrete were successfully prepared in line with GB/T 11968-2006 of the A3.5, B06-class by low-silica iron ore tailings as the main raw material, aluminum powder as gas evolution agent. Iron ore tailings,silica sand,lime,cement and gypsum with the optimized ratio（mass ratio） was 40 ： 20 ： 25 ： l0 ： 5 in the case of maximizing the use of iron ore tailings, aluminum powder was added at 0. 057 % , water/solide ratio was 0. 57, the static stop curing at 70℃, the compressive strength and the calculated specific strength of the finished aerated concrete samples with the bulk density of 590 kg/m3 were 4. 11 and 6.97 MPa. The major mineral phases in the aera- ted concrete product were tobermorite with residue quartz and anhydrite. SEM and EDS results show that the finished product to form a network structure by CSH and tobermorite , the compressive strength of aerated concrete samples areeffectively improved.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2012年第7期1129-1133,共5页
Journal of China Coal Society
基金
"十一五"国家科技支撑计划资助项目(2006BAC21B03)
关键词
铁尾矿
加气混凝土
抗压强度
托贝莫来石
iron ore tailings
aerated concrete
compressive strength
tobermorite
作者简介
作者简介：王长龙（1977-），男，黑龙江七台河人，讲师，博士研究生。E—mail：13716996653@139.com.
