正在加载图片...
崔孝炜等:透辉石粉的火山灰反应特性 ·663· 石膏的激发作用下,吸收体系中的Ca(OH)2,促进 [4]Liu C X,Sun J L,Feng B F.Mechanical properties and micro- C一S一H凝胶的生成.随着水化产物的逐渐形成,透 structures of Al,O:ceramics using diopside as additives.Synth Cnst,2010,39(6):1549 辉石颗粒表面与溶液之间的溶解平衡被不断打破, (刘长霞,孙军龙,冯宝富.以透辉石为烧结助剂的A山203陶 促进硅氧四面体从粉体颗粒表面不断迁移出来,使 瓷的力学性能和显微结构.人工品体学报,2010,39(6): 颗粒表面的硅氧四面体聚合度快速下降,剩余的硅 1549) 氧四面体的活性又再次被激发,体系中硅溶解物的 Sathiyakumar M,Gnanam F D.Role of wollastonite additive on 浓度也逐渐增大.而发生解离的粉体颗粒溶出的低 density,microstructure and mechanical properties of alumina.Ce- ram Int,2003,29(8):869 聚硅酸根离子又可吸收一定量的Ca(OH),生成C- 6]Geng B Y,Ni W,Wang J J,et al.An initiative investigation of S-H凝胶,这也是胶凝材料强度持续增长的主要原 the pozzolanic reaction of ground lead-gine ore tailings.Int Earth 因.另一方面,体系中未参与水化反应的石音填 Sei Eng,2015,8(3):1271 充于CS-H凝胶和未反应的透辉石粉颗粒之间, [] Geng B Y,Ni W,Wang J J,et al.Grey connection analysis be- 使得体系孔隙率下降,对于强度的增长也有促进作 tween particle size distribution of lead-zine tailings and its perform- ance as cement mixture.Met Mine,2014 (5):176 用.从图4~7可以看出,随着水化反应龄期的增 (耿碧瑶,倪文,王佳佳,等.某铅锌尾矿粒度与其作水泥混 加,C-S-H凝胶不断生成,水化浆体中的空隙明显 合材性能的灰色关联.金属矿山,2014(5):176) 减少,促进了体系强度的持续增长 8] Gomes S,Francois M,Pellissier C,et al.Characterization and comparative study of coal combustion residues from a primary and 3结论 additional flue gas secondary desulfurization process.Cem Concr Res,1998,28(11):1605 (1)以透辉石、氢氧化钙和石音为原料制备胶 9] Bensted J,Bames P.Structure and Performance of Cements.New 凝材料.试验结果表明,透辉石粉具有火山灰反应 York:CRC Press,2014 活性,随着反应龄期的增加,力学性能不断增加.其 [10]Yu B Y,Gao Y X,Wang J.Hydration behavior of super sulpha- 净浆试块在3、7和28d龄期时抗压强度分别可以达 ted cement with different types of gypsum.J Build Mater,2014, 到9.83、12.79和18.87MPa 17(6):965 (余保英,高有欣,王军.含不同石膏种类的超硫酸盐水泥 (2)在透辉石粉胶凝材料体系中,XRD、SEM、 的水化行为.建筑材料学报,2014,17(6):965) IR、DSC、NMR等测试结果表明,在石膏的激发作用 [11]Ylmen R,Jaglid U,Steenari B M,et al.Early hydration and 下,Ca(OH)2会被大量消耗,胶凝材料发生火山灰反 setting of Portland cement monitored by IR,SEM and Vicat tech- 应的主要水化产物是C一S-H凝胶.随着水化反应 niques.Cem Concr Res,2009,39(5):433 龄期的增加,CSH凝胶不断生成,另一方面,未参 2]Wang Q,Yan P Y.Hydration properties of basic oxygen fumace steel slag.Constr Build Mater,2010,24(7):1134 与反应的石膏颗粒起到填充作用,也促进了体系强 [13]Silva D A,Roman H R,Gleize P J P.Evidences of chemical in- 度的持续增长 teraction between EVA and hydrating Portland cement.Cem Con- rRes,2002,32(9):1383 [14]Lee T C,Wang W J,Shih P Y,et al.Enhancement in early 参考文献 strengths of slag-cement mortars by adjusting basicity of the slag [1]Liu J,He R M,Gui Y J,et al.Experimental research on befefici- prepared from fly-ash of MSWI.Cem Coner Res,2009.39(8): ation for diopside in skam deposits.Multipurp Utiliz Miner Res, 651 2015(6):29 15] Mollah M Y A.Yu W H,Schennach R,et al.A Fourier trans- (刘敬,何瑞明,桂亚军,等.矽卡岩型透辉石矿选矿试验 form infrared spectroscopic investigation of the early hydration of 矿产综合利用,2015(6):29) Portland cement and the influence of sodium lignosulfonate.Cem 2]Liu S F,Zhai Y C,Zhang X Y,et al.The status of exploitation Coner Res,2000,30(2):267 and utilize,also the prospecting potential of diopside in Longbao 16] Trezza M A,Lavat A E.Analysis of the system 3Ca0.Al,O Area of Shaanxi.Gansu Metall,2014,36(2):56 CaSO2H2O-CaCO3-H2O by FT-R speetroscopy.Cem Coner (刘少峰,翟义存,张旭宇,等.陕西陇宝地区透辉石矿开发 Res,2001,31(6):869 利用现状及找矿潜力.甘肃治金,2014,36(2):56) [17]Carmona-Quiroga P M,Blanco-Varela M T.Ettringite decompo- B]Zhu HJ,Yao X,Guo Z Y,et al.Properties and microstructure of sition in the presence of barium carbonate.Cem Concr Res, fly ash based mullite modified by diopside.J Synth Cryst,2013, 2013,52:140 42(10):2092 [18]Yang N R,Yue W H.The Handbook of Inorganic Matalloid Ma- (诸华军,姚晓,郭宗艳,等.透辉石改性粉煤灰基莫来石的 terials Atlas.Wuhan:Wuhan University of Technology Press, 性能和微观结构.人工品体学报,2013,42(10):2092) 2000崔孝炜等: 透辉石粉的火山灰反应特性 石膏的激发作用下,吸收体系中的 Ca( OH) 2,促进 C--S--H 凝胶的生成. 随着水化产物的逐渐形成,透 辉石颗粒表面与溶液之间的溶解平衡被不断打破, 促进硅氧四面体从粉体颗粒表面不断迁移出来,使 颗粒表面的硅氧四面体聚合度快速下降,剩余的硅 氧四面体的活性又再次被激发,体系中硅溶解物的 浓度也逐渐增大. 而发生解离的粉体颗粒溶出的低 聚硅酸根离子又可吸收一定量的 Ca( OH) 2生成 C-- S--H 凝胶,这也是胶凝材料强度持续增长的主要原 因[25]. 另一方面,体系中未参与水化反应的石膏填 充于 C--S--H 凝胶和未反应的透辉石粉颗粒之间, 使得体系孔隙率下降,对于强度的增长也有促进作 用. 从图 4 ~ 7 可以看出,随着水化反应龄期的增 加,C--S--H 凝胶不断生成,水化浆体中的空隙明显 减少,促进了体系强度的持续增长. 3 结论 ( 1) 以透辉石、氢氧化钙和石膏为原料制备胶 凝材料. 试验结果表明,透辉石粉具有火山灰反应 活性,随着反应龄期的增加,力学性能不断增加. 其 净浆试块在3、7 和28 d 龄期时抗压强度分别可以达 到 9. 83、12. 79 和 18. 87 MPa. ( 2) 在透辉石粉胶凝材料体系中,XRD、SEM、 IR、DSC、NMR 等测试结果表明,在石膏的激发作用 下,Ca( OH) 2会被大量消耗,胶凝材料发生火山灰反 应的主要水化产物是 C--S--H 凝胶. 随着水化反应 龄期的增加,C--S--H 凝胶不断生成,另一方面,未参 与反应的石膏颗粒起到填充作用,也促进了体系强 度的持续增长. 参 考 文 献 [1] Liu J,He R M,Gui Y J,et al. Experimental research on befefici￾ation for diopside in skarn deposits. Multipurp Utiliz Miner Res, 2015( 6) : 29 ( 刘敬,何瑞明,桂亚军,等. 矽卡岩型透辉石矿选矿试验. 矿产综合利用,2015( 6) : 29) [2] Liu S F,Zhai Y C,Zhang X Y,et al. The status of exploitation and utilize,also the prospecting potential of diopside in Longbao Area of Shaanxi. Gansu Metall,2014,36( 2) : 56 ( 刘少峰,翟义存,张旭宇,等. 陕西陇宝地区透辉石矿开发 利用现状及找矿潜力. 甘肃冶金,2014,36( 2) : 56) [3] Zhu H J,Yao X,Guo Z Y,et al. Properties and microstructure of fly ash based mullite modified by diopside. J Synth Cryst,2013, 42( 10) : 2092 ( 诸华军,姚晓,郭宗艳,等. 透辉石改性粉煤灰基莫来石的 性能和微观结构. 人工晶体学报,2013,42( 10) : 2092) [4] Liu C X,Sun J L,Feng B F. Mechanical properties and micro￾structures of Al2 O3 ceramics using diopside as additives. J Synth Cryst,2010,39( 6) : 1549 ( 刘长霞,孙军龙,冯宝富. 以透辉石为烧结助剂的 Al2 O3 陶 瓷的力学性能和显 微 结 构. 人 工 晶 体 学 报,2010,39 ( 6 ) : 1549) [5] Sathiyakumar M,Gnanam F D. Role of wollastonite additive on density,microstructure and mechanical properties of alumina. Ce￾ram Int,2003,29( 8) : 869 [6] Geng B Y,Ni W,Wang J J,et al. An initiative investigation of the pozzolanic reaction of ground lead-zinc ore tailings. Int J Earth Sci Eng,2015,8( 3) : 1271 [7] Geng B Y,Ni W,Wang J J,et al. Grey connection analysis be￾tween particle size distribution of lead-zinc tailings and its perform￾ance as cement mixture. Met Mine,2014( 5) : 176 ( 耿碧瑶,倪文,王佳佳,等. 某铅锌尾矿粒度与其作水泥混 合材性能的灰色关联. 金属矿山,2014( 5) : 176) [8] Gomes S,Francois M,Pellissier C,et al. Characterization and comparative study of coal combustion residues from a primary and additional flue gas secondary desulfurization process. Cem Concr Res,1998,28( 11) : 1605 [9] Bensted J,Barnes P. Structure and Performance of Cements. New York: CRC Press,2014 [10] Yu B Y,Gao Y X,Wang J. Hydration behavior of super sulpha￾ted cement with different types of gypsum. J Build Mater,2014, 17( 6) : 965 ( 余保英,高育欣,王军. 含不同石膏种类的超硫酸盐水泥 的水化行为. 建筑材料学报,2014,17( 6) : 965) [11] Ylmén R,Jglid U,Steenari B M,et al. Early hydration and setting of Portland cement monitored by IR,SEM and Vicat tech￾niques. Cem Concr Res,2009,39( 5) : 433 [12] Wang Q,Yan P Y. Hydration properties of basic oxygen furnace steel slag. Constr Build Mater,2010,24( 7) : 1134 [13] Silva D A,Roman H R,Gleize P J P. Evidences of chemical in￾teraction between EVA and hydrating Portland cement. Cem Con￾cr Res,2002,32( 9) : 1383 [14] Lee T C,Wang W J,Shih P Y,et al. Enhancement in early strengths of slag-cement mortars by adjusting basicity of the slag prepared from fly-ash of MSWI. Cem Concr Res,2009,39( 8) : 651 [15] Mollah M Y A,Yu W H,Schennach R,et al. A Fourier trans￾form infrared spectroscopic investigation of the early hydration of Portland cement and the influence of sodium lignosulfonate. Cem Concr Res,2000,30( 2) : 267 [16] Trezza M A,Lavat A E. Analysis of the system 3CaO·Al2 O3-- CaSO4 ·2H2O--CaCO3--H2 O by FT-IR spectroscopy. Cem Concr Res,2001,31( 6) : 869 [17] Carmona-Quiroga P M,Blanco-Varela M T. Ettringite decompo￾sition in the presence of barium carbonate. Cem Concr Res, 2013,52: 140 [18] Yang N R,Yue W H. The Handbook of Inorganic Matalloid Ma￾terials Atlas. Wuhan: Wuhan University of Technology Press, 2000 · 366 ·
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有