化工进展2017，Vol.36Issue(4)：1482-1490,9.DOI:10.16085/j.issn.1000-6613.2017.04.043
铁尾矿加气混凝土制备工艺及结构形成机理分析
Reaction mechanism on autoclaved aerated concrete made from low-grade vanadium titanium iron tailings
摘要
Abstract
Based on low-lean vanadium and titanium iron tailings as raw material,the technology of autoclaved aerated concrete(AAC)block was developed,in which compressive strength was more than 3.5MPa and dry bulk density prepared was about 620kg/m3. The products was slightly more than A3.5B06 grade qualification requirements. The physical and mechanical properties,the vibration of the functional group,phase transformation process,microstructure,etc. of aerated concrete block were tested by X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),thermogravimetric and differential scanning calorimeter(TG-DSC),scanning electron microscope(SEM)and other modern analysis test methods. Under the atmospheric pressure,the iron tailings was a kind of inertia industrial waste residue. Only a small amount of active component in iron tailings participated in the chemical reaction. Small amounts of the hydrated calcium silicategel and ettringite were in the hardened body. Under the autoclaved curing condition,the activity of iron tailings was good. Free SiO2and Al2O3 and mixture of Ca(OH)2 took place chemical reaction to generate tobermorite. A dense mesh structure was formed by hydration products of crystal cluster fitting aggregating together,which had positive effect to improve the strength of the products.关键词
低贫钒钛铁尾矿/加气混凝土/水化产物/托贝莫来石/反应机理Key words
low-grade vanadium titanium iron tailings/autoclaved aerated concrete(AAC)/hydration products/tobermorite/mechanism of reaction分类
建筑与水利引用本文复制引用
罗立群,舒伟,程琪林,谭旭升..铁尾矿加气混凝土制备工艺及结构形成机理分析[J].化工进展,2017,36(4):1482-1490,9.基金项目
国家"十二五"科技支撑计划项目(2013BAB03B03). （2013BAB03B03）
