石膏基胶凝材料与砌块的配比优化及性能研究
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摘要
以建筑石膏为主要原料,掺入适量的硅酸盐水泥和石膏晶须制备石膏基胶凝材料及砌块,基于Minitab中的"混料设计"原理,确定了石膏基胶凝材料的最佳配比;通过掺入有机硅憎水剂,提高了石膏基胶凝材料及砌块的耐水性。结果表明:石膏晶须能降低石膏基胶凝材料及砌块的表观密度,且可以水化生成二水石膏,与其它轻质材料相比,可有效减少石膏基胶凝材料及砌块的强度损失。以建筑石膏52.2%、硅酸盐水泥27.4%、石膏晶须20.4%,外掺3%有机硅憎水剂制备的600 mm×500 mm×100 mm实心石膏砌块,表观密度可降到965 kg/m~3,断裂荷载为3260 N,软化系数为0.65,符合JC/T 698—2010《石膏砌块》的要求。
In this paper,building gypsum is used as the main raw material,and appropriate amount of Portland cement and gypsum whiskers are used to prepare gypsum based cementitious material and block. Based on the "mixture design" principle in Minitab,the optimum proportion of gypsum based cementitious material is determined. The addition of organosilicon hydrophobic agent improves the water resistance of gypsum based cementitious materials and blocks. The experimental results show that gypsum whisker can reduce the apparent density of gypsum based cementitious and block,can be hydrated to form dihydrate gypsum.Compared with other lightweight materials,it can effectively reduce the strength loss of gypsum based cementitious and block. The apparent density of 600 mm ×500 mm ×100 mm solid gypsum block prepared by gypsum 52.2%,Portland cement 27.4%,gypsum whisker 20.4% and 3% organosilicon hydrophobic repellent can be reduced to 965 kg/m~3,the fracture load is 3260 N and softening coefficient is 0.65,which meets the requirements of the standard JC/T 698—2010 "Gypsum block".
In this paper,building gypsum is used as the main raw material,and appropriate amount of Portland cement and gypsum whiskers are used to prepare gypsum based cementitious material and block. Based on the "mixture design" principle in Minitab,the optimum proportion of gypsum based cementitious material is determined. The addition of organosilicon hydrophobic agent improves the water resistance of gypsum based cementitious materials and blocks. The experimental results show that gypsum whisker can reduce the apparent density of gypsum based cementitious and block,can be hydrated to form dihydrate gypsum.Compared with other lightweight materials,it can effectively reduce the strength loss of gypsum based cementitious and block. The apparent density of 600 mm ×500 mm ×100 mm solid gypsum block prepared by gypsum 52.2%,Portland cement 27.4%,gypsum whisker 20.4% and 3% organosilicon hydrophobic repellent can be reduced to 965 kg/m~3,the fracture load is 3260 N and softening coefficient is 0.65,which meets the requirements of the standard JC/T 698—2010 "Gypsum block".
引文
[1]李剑光,张志明,李立新,等.谈绿色新型石膏砌块墙体材料的研究现状及发展[J].中国建材,2015(8):122-125.
[2]何廷树,孟晓林,史琛.脱硫石膏砌块力学性能的研究[J].非金属矿,2014(2):25-26.
[3]李赵相,王冬梅,藤腾,等.利用脱硫石膏制备石膏-粉煤灰-水泥胶凝体系砌块的研究[J].砖瓦,2016(1):46-50.
[4]杜传伟,李国忠,朱江.新型脱硫石膏砌块的制备及性能研究[J].建筑砌块与砌块建筑,2013(6):46-48.
[5]张志国,高玲艳,杨伶凤,等.脱硫石膏制耐水石膏砌块的研究[J].粉煤灰综合利用,2009(2):27-30.
[6] Zhao F Q,Liu H J,Hao L X,et al.Water resistant block from desulfurization gypsum[J].Construction and Building Materials,2012,27(1):531-533.
[7]吴叶,高建明,唐永波.脱硫石膏制备纳米级硫酸钙晶须的试验研究[J].新型建筑材料,2018(1):96-100.
[8]毛君,尹航,崔闯,等.基于Minitab确定最佳参数的实验设计[J].煤矿机械,2008,29(8):14-16.
[9]周红,白志民,闫晶,等.提高脱硫石膏砌块耐水性的研究[J].新型建筑材料,2012(2):23-24.
[10]张南,李家和.有机硅对脱硫石膏硬化体耐水性能影响[J].低温建筑技术,2010,32(12):16-18.
[11] Li G Z,Li J Q,Guan R F,et al.Investigation of the water resistance of gypsum materials[J].Zkg International,2003,56(8):87-93.
[2]何廷树,孟晓林,史琛.脱硫石膏砌块力学性能的研究[J].非金属矿,2014(2):25-26.
[3]李赵相,王冬梅,藤腾,等.利用脱硫石膏制备石膏-粉煤灰-水泥胶凝体系砌块的研究[J].砖瓦,2016(1):46-50.
[4]杜传伟,李国忠,朱江.新型脱硫石膏砌块的制备及性能研究[J].建筑砌块与砌块建筑,2013(6):46-48.
[5]张志国,高玲艳,杨伶凤,等.脱硫石膏制耐水石膏砌块的研究[J].粉煤灰综合利用,2009(2):27-30.
[6] Zhao F Q,Liu H J,Hao L X,et al.Water resistant block from desulfurization gypsum[J].Construction and Building Materials,2012,27(1):531-533.
[7]吴叶,高建明,唐永波.脱硫石膏制备纳米级硫酸钙晶须的试验研究[J].新型建筑材料,2018(1):96-100.
[8]毛君,尹航,崔闯,等.基于Minitab确定最佳参数的实验设计[J].煤矿机械,2008,29(8):14-16.
[9]周红,白志民,闫晶,等.提高脱硫石膏砌块耐水性的研究[J].新型建筑材料,2012(2):23-24.
[10]张南,李家和.有机硅对脱硫石膏硬化体耐水性能影响[J].低温建筑技术,2010,32(12):16-18.
[11] Li G Z,Li J Q,Guan R F,et al.Investigation of the water resistance of gypsum materials[J].Zkg International,2003,56(8):87-93.