铁尾矿加气混凝土制备工艺及结构形成机理分析

doi:10.16085/j.issn.1000-6613.2017.04.043

化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1482-1490.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

罗立群¹, 舒伟^1,2, 程琪林¹, 谭旭升¹

1 武汉理工大学资源与环境工程学院, 湖北武汉 430070;
2 绍兴市质量技术监督检测院, 浙江绍兴 312000

收稿日期:2016-08-16 修回日期:2016-10-01 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: 罗立群
作者简介:罗立群(1968-),男,博士,高级工程师。E-mail:lqluollq@hotmail.com。
基金资助:
国家“十二五”科技支撑计划项目（2013BAB03B03）。

Reaction mechanism on autoclaved aerated concrete made from low-grade vanadium titanium iron tailings

LUO Liqun¹, SHU Wei^1,2, CHENG Qilin¹, TAN Xusheng¹

1 College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China;
2 Shaoxing Testing Institute of Quality Technical Supervision, Shaoxing 312000, Zhejiang, China

Received:2016-08-16 Revised:2016-10-01 Online:2017-04-05 Published:2017-04-05

摘要/Abstract

摘要： 以低贫钒钛铁尾矿为主要原料制备蒸压加气混凝土，其制品抗压强度超过3.5MPa，干体积密度为620kg/m³，达到了A3.5B06级合格品要求。利用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、热重-差示扫描量热仪（TG-DSC）、扫描电子显微镜（SEM）等手段，重点研究了蒸压加气混凝土砌块的抗压强度和干体积密度、官能团的振动、相变过程和微观结构等特性。结果表明：在常温常压下，硬化坯体中出现了少量结晶差的C-S-H凝胶和钙矾石晶体，铁尾矿中各成分参与化学反应只有很少量的活性组分。在蒸压养护条件下，混合物料中的钙质材料水化形成的Ca（OH）₂与铁尾矿、石英砂中的游离SiO₂和Al₂O₃反应得到了托贝莫来石，钙矾石消失；水化产物的晶簇集合体和骨料交织在一起，形成良好的网状致密结构，对提高制品的强度有积极作用。

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

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.

Key words: low-grade vanadium titanium iron tailings, autoclaved aerated concrete(AAC), hydration products, tobermorite, mechanism of reaction

中图分类号:

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(04): 1482-1490.

LUO Liqun, SHU Wei, CHENG Qilin, TAN Xusheng. Reaction mechanism on autoclaved aerated concrete made from low-grade vanadium titanium iron tailings[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1482-1490.

参考文献

[1] KURAMA H,TOPCU I B,KARAKURT C. Properties of the autoclaved aerated concrete produced from coal bottom ash[J]. Journal of Materials Processing Technology,2008,209(2):767-773.
[2] HAUSER A,EGGENBERGER U,MUMENTHALER T. Fly ash from cellulose industry as secondary raw material in autoclaved aerated concrete[J]. Cement and Concrete Research,1999,29(3):297-302.
[3] 罗立群,舒伟. 利用矿山尾矿制备加气混凝土技术现状[J]. 中国矿业,2014,23(12):140-146. LUO L Q,SHU W. Technology status of autoclaved aerated concrete by utilizing mine tailings[J]. China Mining Maganize,2014,23(12):140-146.
[4] WALCZAK P,SZYMA?SKI P,RÓ?YCKA A. Autoclaved aerated concrete based on fly ash in density 350 kg/m³ as an environmentally friendly material for energy-efficient constructions[J]. Procedia Engineering,2015,122:39-46.
[5] MA B G,CAI L X,LI X G,et al. Utilization of iron tailings as substitute in autoclaved aerated concrete:physico-mechanical and microstructure of hydration products[J]. Journal of Cleaner Production,2016,127:162-171.
[6] FONSECA P C,JENNINGS H M. The effect of drying on early-age morphology of C-S-H as observed in environmental sem[J]. Cement & Concrete Research,2010,40(12):1673-1680.
[7] TENNIS P D,JENNINGS H M. A model for two types of calcium silicate hydrate in the microstructure of Portland cement pastes[J]. Cement & Concrete Research,2000,30(6):855-863.
[8] NONAT A. The structure and stoichiometry of C-S-H[J]. Cement & Concrete Research,2004,34(9):1521-1528.
[9] KIKUMA J,TSUNASHIMA M,ISHIKAMW T,et al. Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction[J]. Journal of Solid State Chemistry,2011,184(8):2066-2074.
[10] KIKUMA J,TSUNASHIMA M,ISHIKAMW T,et al. Development of an in situ X-ray diffraction system for hydrothermal reactions and its application to autoclaved aerated concrete formation[J]. Powder Diffraction,2011,26(2):26-128.
[11] ISU N,TERAMURA S,ISHIDA H,et al. Influence of quartz particle size on the chemical and mechanical properties of autoclaved aerated concrete (Ⅱ) fracture toughness,strength and micropore[J]. Cement & Concrete Research,1995,25(2):49-254.
[12] 罗立群,程琪林. 加气混凝土制备工艺影响因素分析[J]. 建筑节能,2015,43(10):40-44. LuO L Q,CHENG Q L. Analysis of influential factors on preparation of autoclaved aerated concrete[J]. Building Energy Efficiency,2015,43(10):40-44.
[13] MATSUI K,KIKUMA J,TSUNASHIMA M,et al. In situ time-resolved X-ray diffraction of tobermorite formation in autoclaved aerated concrete:influence of silica source reactivity and al addition[J]. Cement & Concrete Research,2011,41(5):510-519.
[14] 舒伟,罗立群,程琪林,等. 低贫钒钛铁尾矿制备加气混凝土[J]. 过程工程学报,2015,15(6):1075-1080. SHU W,LUO L Q,CHENG Q L,et al. Autoclaved aerated concrete made from low-contents vanadium titanium iron tailings[J]. The Chinese Journal of Process Engineering,2015,15(6):1075-1080.
[15] 李明德,秦勇. X射线衍射相分析在胶凝材料研究中的应用[J]. 云南建材,1999(2):34-45. LI M D,QIN Y. Application of X-ray diffraction phase analysis in the study of cementitious materials[J]. Yunnan Building Materials,1999(2):34-45.
[16] SARASWATHY V,MURALIDHARAN S,THANGAVEL K,et al. Influence of activated fly ash on corrosion-resistance and strength of concrete[J]. Cement & Concrete Composites,2003,25(2):673-680.
[17] 牟善彬,卓蓉辉. 蒸养条件对粉煤灰加气混凝土强度影响的微观分析[J]. 新型墙体材料与施工,2002(25):23. MOU S B,ZHUO R H. Micro analysis of the effect of steam curing condition on strength of fly ash aerated concrete[J]. New Wall Materials and Construction,2002(25):23.
[18] 邝培翠. 有机化合物波普分析[M]. 武汉:华中师范大学出版社,1986. KUANG P C. Magnetic resonance spectroscopy analysis of organic compounds[M]. Wuhan:Central China Normal University Press,1986.
[19] 刘振海,陆立明,唐远旺. 热分析简明教程[M]. 北京:科学出版社,2012. LIU Z H,LU L M,TANG Y W. Concise course of thermal analysis[M]. Beijing:Science Press,2012.
[20] SINGH M,GARG M. Activation of gypsum anhydrite-slag mixtures[J]. Cement & Concrete Research,1995,25(2):332-338.
[21] 李明德,秦勇. 用差热分析法鉴别相变类型[J]. 材料导报,1996(4):79-80. LI M D,QIN Y. The identification of phase transition types by differential thermal analysis[J]. Materials Review,1996(4):79-80.
[22] KLIMESCH D S,RAY A. DTA-TGA evaluations of the CaO-Al₂O₃-SiO₂-H₂O system treated hydrothermally[J]. Thermochimica Acta,1999,334(1/2):15-122.

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

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	张广宇, 赵健, 孙峰, 姜杰, 孙冰, 徐伟. CO₂催化转化制碳酸丙烯酯研究进展：催化剂设计、性能与反应机理[J]. 化工进展, 2022, 41(S1): 177-189.
[2]	胡文德, 王仰东, 王传明. 合成气直接催化转化制低碳烯烃研究进展[J]. 化工进展, 2022, 41(9): 4754-4766.
[3]	李艳平, 严大洲, 杨涛, 温国胜, 韩治成. 硅基电子气去除甲基氯硅烷的分子动力学模拟[J]. 化工进展, 2022, 41(8): 4375-4385.
[4]	常耀萍, 官修帅, 郑谦, 靳山彪, 张长明, 张小超. 水热法制备3D花球状Bi₂SiO₅及其光催化油酸酯化反应[J]. 化工进展, 2022, 41(8): 4181-4191.
[5]	陈欢, 万坤, 牛波, 张亚运, 龙东辉. 废弃塑料化学回收及升级再造研究进展[J]. 化工进展, 2022, 41(3): 1453-1469.
[6]	纪子柯, 包成. CO选择性甲烷化的研究进展[J]. 化工进展, 2022, 41(1): 120-132.
[7]	张雯惠, 华睿, 齐随涛. 低温费托合成蜡油加氢裂化精制技术的研究进展[J]. 化工进展, 2021, 40(S1): 81-87.
[8]	田原宇, 乔英云. 石油热解过程中自由基调控反应机理的构建与应用[J]. 化工进展, 2021, 40(5): 2928-2932.
[9]	刘义涛, 朱明辉, 杨子旭, 孟博, 涂维峰, 韩一帆. 煤制化学品：合成气直接制低碳烯烃催化剂研究进展[J]. 化工进展, 2021, 40(2): 594-604.
[10]	陈惠超, 李雪, 梁潇, 王梦. 机械化学方法在环境污染控制领域的应用研究进展[J]. 化工进展, 2021, 40(11): 6332-6346.
[11]	马欣如, 郭涛, 王群, 李俊美, 张振楠, 曹青. 煤沥青基吸水树脂的制备与性能[J]. 化工进展, 2021, 40(10): 5634-5641.
[12]	焦佳鹏, 田海锋, 何环环, 查飞, 郭效军, 唐小华. CO/CO₂加氢制芳烃的研究进展[J]. 化工进展, 2021, 40(1): 205-220.
[13]	练彩霞, 李凝, 蒋武, 马浩, 彭瀚. 生物质油催化加氢脱氧（HDO）反应机理及催化剂研究进展[J]. 化工进展, 2020, 39(S1): 153-162.
[14]	侯珏, 李春虎. 甘油直接制备丙烯醇的催化剂和反应工艺研究进展[J]. 化工进展, 2020, 39(7): 2648-2655.
[15]	庄晓如,徐心海,夏鑫,李伦,徐文福. 甲醇蒸汽重整制氢反应动力学研究进展[J]. 化工进展, 2020, 39(1): 152-165.