| 引用本文: | 王长龙,倪文,李德忠,王爽.灵丘铁矿尾矿制备加气混凝土的试验研究[J].材料科学与工艺,2012,20(6):7-12.DOI:10.11951/j.issn.1005-0299.20120602. |
| WANG Chang-long,NI Wen,LI De-zhong,WANG Shuang.Experimental study on aerated concrete with Lingqiu iron ore tailings[J].Materials Science and Technology,2012,20(6):7-12.DOI:10.11951/j.issn.1005-0299.20120602. |
|
| 摘要: |
| 为综合利用固体废弃物铁尾矿,以山西灵丘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/T11968—2006标准的A3.5、B06级加气混凝土.考虑最大限度使用铁尾矿的情况下,通过试验得出生产铁尾矿加气混凝土的优化方案:尾矿粉磨时间25 min,硅砂粉磨时间为30 min,配料质量比为m(铁尾矿)∶m(硅砂)∶m(石灰)∶m(水泥)∶m(脱硫石膏)为40∶20∶24∶10∶6.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,此外还有硬石膏和尾矿中残留的石英等.扫描电镜和能谱分析结果显示,成品中形成C-S-H凝胶和托贝莫来石相互致密交织的显微结构,这是加气混凝土获得较高强度的重要原因. |
| 关键词: 铁尾矿 加气混凝土 粉磨时间 抗压强度 托贝莫来石 |
| DOI：10.11951/j.issn.1005-0299.20120602 |
| 分类号: |
| 基金项目:国家高技术研究发展计划资助项目(2012AA062405). |
|
| Experimental study on aerated concrete with Lingqiu iron ore tailings |
|
WANG Chang-long1,2, NI Wen1, LI De-zhong1, WANG Shuang1
|
|
(1.Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines,School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;;2.School of Civil Engineering,Hebei University of Engineering,Handan 056038,China);1.Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines,School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.School of Civil Engineering,Hebei University of Engineering,Handan 056038,China
|
| Abstract: |
| For comprehensive utilization of iron ore tailings,the aerated concrete was successfully prepared by Shanxi Lingqiu low-silica iron ore tailings as the main raw material and aluminum powder as gas evolution agent,which is in line with GB/T11968—2006 of the A3.5 B06-class.In the case of the maximize use of iron ore tailings,the optimized plan of aerated concrete production was that the iron ore tailings grinding time was 25 min,silica sand grinding time was 30 min,burdening mass ratio of iron ore tailings,silica sand,lime cement and gypsum was 40∶20∶24∶10∶6.The major mineral phases in the aerated concrete product were tobermorite with residue quartz and anhydrite.SEM and EDS results showed that the finished product to form bense microstructure by C-S-H gel and tobermorite,it was important reason that aerated concrete obtained high strength. |
| Key words: iron ore tailings aerated concrete granding time compressive strength tobermorite |
