以铁尾矿为主要原料制备加气混凝土,用X射线衍射(XRD)和场发射扫描电镜(FE-SEM)分析制品的水化产物和微观形貌,研究了铁尾矿的粉磨时间以及各原料组份对加气混凝土物理力学性能的影响.结果表明,绝干加气混凝土密度为588 kg/m3,抗压强度为4.07 MPa;制品中主要物相为水化产物0.9,1.1,1.4 nm托贝莫来石和C-S-H凝胶,以及铁钙闪石、硬石膏、方解石和水化反应中残留的石英;制品强度与水化产物C-S-H凝胶和托贝莫来石胶结有关.
参考文献
[1] | Innovative methodology for comprehensive utilization of iron ore tailings Part 1. The recovery of iron from iron ore tailings using magnetic separation after magnetizing roasting[J].Journal of hazardous materials,2010(1/3):71. |
[2] | 王长龙,倪文,李德忠,耿碧瑶,吴辉.山西灵丘低硅铁尾矿制备加气混凝土的试验研究[J].煤炭学报,2012(07):1129-1133. |
[3] | YI Zhong-lai;SUN Heng-hu;LI Chao et al.Relationship between polymerization degree and cementitious activity of iron ore tailings[J].International Journal of Minerals Metallurgy and Materials,2010,17(13):116-120. |
[4] | Innovative methodology for comprehensive utilization of iron ore tailings Part 2: The residues after iron recovery from iron ore tailings to prepare cementitious material[J].Journal of hazardous materials,2010(1/3):78. |
[5] | Zhong-lai Yi,Heng-hu Sun,Xiu-quan Wei,Chao Li.Iron ore tailings used for the preparation of cementitious material by compound thermal activation[J].矿物冶金与材料学报,2009(03):355-358. |
[6] | 刘声雷.胶结充填在铁山矿的应用[J].有色金属(矿山部分),2011(01):5-7. |
[7] | Production of lightweight ceramisite from iron ore tailings and its performance investigation in a biological aerated filter (BAF) reactor[J].Journal of hazardous materials,2010(1/3):999. |
[8] | 李德忠,倪文,张静文,吴辉,张玉燕.铁尾矿在蒸压养护过程中的物相变化[J].硅酸盐学报,2011(04):708-713. |
[9] | 李德忠,倪文,王长龙,耿碧瑶.不同养护条件对铁尾矿加气混凝土性能的影响[J].新型建筑材料,2011(08):22-24,36. |
[10] | 李德忠,倪文,郑永超,张玉燕.钙质材料对铁尾矿加气混凝土砌块性能的影响[J].金属矿山,2011(05):161-163,167. |
[11] | Takayuki Maeshima;Hiroaki Noma;Masato Sakiyama .Natural 1.1 and 1.4 nm tobermorites from Fuka, Okayama, Japan: Chemical analysis, cell dimensions, ~(29)Si NMR and thermal behavior[J].Cement and Concrete Research,2003(10):1515-1523. |
[12] | 方永浩,庞二波,王锐,宣文,陈宇峰.用低硅铜尾矿制备蒸压灰砂砖[J].硅酸盐学报,2010(04):559-563. |
[13] | Gittos M F;Lorimer G W;Champness P E .An electron-microscopic study of precipitation (exsolution) in an amphibole (the hornblende-grunerite system)[J].Journal of Materials Science,1974,9(02):184-191. |
[14] | Bensted J;Barnes P.Structure and Performance of Cements[M].New York:Spon Press,2002 |
[15] | Elena Bonaccorsi;Stefano Merlino;Anthony R. Kampf .The Crystal Structure of Tobermorite 14 A (Plombierite), a C-S-H Phase[J].Journal of the American Ceramic Society,2005(3):505-512. |
[16] | 王长龙,倪文,李德忠,耿碧瑶,吴辉.山西灵丘低硅铁尾矿制备加气混凝土的试验研究[J].煤炭学报,2012(07):1129-1133. |
[17] | Taylor H F W.The Chemistry of Cements[M].London:Academic Press Inc Ltd,1964 |
[18] | HamidSA .The crystal structure of 11 (A) tobermorite Ca2.25[Si3O7.5(OH)1.5]H2O[J].Zeitschrift für Kristallographie,1981,154(02):189-198. |
[19] | Jae Eun Oh;Simon M. Clark;Hans-Rudolf Wenk .Experimental determination of bulk modulus of 14 A tobermorite using high pressure synchrotron X-ray diffraction[J].Cement and Concrete Research,2012(2):397-403. |
[20] | Xiao-yan Huang;Wen Ni;Wei-hua Cui;Zhong-jie Wang;Li-ping Zhu .Preparation of autoclaved aerated concrete using copper tailings and blast furnace slag[J].Construction and Building Materials,2012(1):1-5. |
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