土聚水泥早期抗压强度的影响因素分析
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摘要
通过正交设计试验研究了偏高岭土基土聚水泥早期抗压强度对氢氧化钠用量、水玻璃用量和水用量三个因素的敏感性,并用单因素变量法分析了土聚水泥早期抗压强度的影响因素。试验结果表明:在一定范围内,氢氧化钠用量的增加极大地促进了土聚水泥早期抗压强度的发展;水玻璃用量对土聚水泥抗压强度的显著影响主要表现在后期,但过量的水玻璃对早期抗压强度发展有不利影响;随着水用量的增加,土聚水泥的抗压强度逐渐降低,而各龄期的强度降低幅度基本保持一致。正确选择土聚水泥配合料组成,可获得高早强和工作性良好的土聚水泥,这对土聚水泥在维修补强等工程中的广泛应用有着重要的指导意义。
In this paper,the sensitivity of early-age compressive strength of metakaolin-based geopolymer cement to sodium hydroxide,sodium silicate and water was investigated by orthogonal experiments. Besides,the influence factors of early-age compressive strength of geopolymer cement were analyzed by single factor method. The results show that the increase of sodium hydroxide content greatly promotes the development of early-age compressive strength of geopolymer cement in a certain range. It was observed that the effect of sodium silicate dosage on the compressive strength of geopolymer cement was significant,which occurred at later stage,but excessive amount of sodium silicate would inhibit the development of early-age compressive strength. With the increase of water content,the compressive strength of geopolymer cement decreased gradually,but the decreasing range of strength of each age was basically the same. It is analyzed that the geopolymer cement with high early-age strength and good workability can be obtained by choosing the appropriate composition of geopolymer cement mixture,which has guiding significance for the extensive application of geopolymer cement in maintenance and reinforcement engineering.
In this paper,the sensitivity of early-age compressive strength of metakaolin-based geopolymer cement to sodium hydroxide,sodium silicate and water was investigated by orthogonal experiments. Besides,the influence factors of early-age compressive strength of geopolymer cement were analyzed by single factor method. The results show that the increase of sodium hydroxide content greatly promotes the development of early-age compressive strength of geopolymer cement in a certain range. It was observed that the effect of sodium silicate dosage on the compressive strength of geopolymer cement was significant,which occurred at later stage,but excessive amount of sodium silicate would inhibit the development of early-age compressive strength. With the increase of water content,the compressive strength of geopolymer cement decreased gradually,but the decreasing range of strength of each age was basically the same. It is analyzed that the geopolymer cement with high early-age strength and good workability can be obtained by choosing the appropriate composition of geopolymer cement mixture,which has guiding significance for the extensive application of geopolymer cement in maintenance and reinforcement engineering.
引文
[1]吴浩,管学茂.土聚水泥的研究现状及应用发展前景[J].水泥工程,2004,(02):27-32.
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[4]段瑜芳,王培铭,杨克锐.碱激发偏高岭土胶凝材料水化硬化机理的研究[J].新型建筑材料,2006,(01):22-25.
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[7] Z Zuhua,Y Xiao,Z Huajun,et al. Role of water in the synthesis of calcined kaolin-based geopolymer[J]. Applied Clay Science,2009,43(2):218-223.
[8]贾屹海,韩敏芳,孟宪娴,等.粉煤灰地质聚合物凝结时间的研究[J].硅酸盐通报,2009,28(05):893-899.
[9]黄俊田,伦云霞.磨细钢渣微粉掺量对水泥砂浆力学性能的影响[J].武汉轻工大学学报,2017,36(01):67-70.
[10] Rees C A,Provis J L,Lukey G C,et al. In situ ATR-FTIR study of the early stages of fly ash geopolymer gel formation[J]. Langmuir the Acs Journal of Surfaces&Colloids,2007,23(17):9076.
[11] Matthew Rowles,Brian O'Connor. Chemical optimisation of the compressive strength of aluminosilicate geopolymers synthesised by sodium silicate activation of metakaolinite[J]. Journal of Materials Chemistry,2003,13(5):1161-1165.
[12] Xu H,Deventer J S J V,Lukey G C. Effect of Alkali Metals on the Preferential Geopolymerization of Stilbite/Kaolinite Mixtures[J]. Industrial&Engineering Chemistry Research,2001,40(17):3749-3756.
[13]彭晖,李树霖,蔡春声,等.偏高岭土基地质聚合物的配合比及养护条件对其力学性能及凝结时间的影响研究[J].硅酸盐通报,2014,33(11):2809-2817,2827.
[14]李款,卢都友,李孟浩,等.水用量对偏高岭土基地聚合物微观结构及反应过程的影响[J].硅酸盐学报,2016,44(02):226-231.
[15] P. Duxson,A. Fernández-Jiménez,J. L. Provis. Geopolymer technology:the current state of the art[J]. Journal of Materials Science,2007,42(9):2917-2933.
[16]李维,水对碱激发地质聚合物微观结构及性能的影响[D].广西:广西大学,2018.
[2]常利,艾涛,延西利,等.地聚合物水泥路面快速修补材料性能研究[J].武汉理工大学学报,2014,36(5):49-54.
[3]邓新.用于水泥混凝土路面快速修补的粉煤灰基地聚合物性能研究[D].中国地质大学,2017.
[4]段瑜芳,王培铭,杨克锐.碱激发偏高岭土胶凝材料水化硬化机理的研究[J].新型建筑材料,2006,(01):22-25.
[5] Palomo A,Grutzeck M W,Blanco M T. Alkaliactivated fly ashes:A cement for the future[J].Cement&Concrete Research,1999,29(8):1323-1329.
[6]冷达,薛华艳.激发剂对土聚水泥力学性能影响的研究[J].水泥,2007,(03):10-13.
[7] Z Zuhua,Y Xiao,Z Huajun,et al. Role of water in the synthesis of calcined kaolin-based geopolymer[J]. Applied Clay Science,2009,43(2):218-223.
[8]贾屹海,韩敏芳,孟宪娴,等.粉煤灰地质聚合物凝结时间的研究[J].硅酸盐通报,2009,28(05):893-899.
[9]黄俊田,伦云霞.磨细钢渣微粉掺量对水泥砂浆力学性能的影响[J].武汉轻工大学学报,2017,36(01):67-70.
[10] Rees C A,Provis J L,Lukey G C,et al. In situ ATR-FTIR study of the early stages of fly ash geopolymer gel formation[J]. Langmuir the Acs Journal of Surfaces&Colloids,2007,23(17):9076.
[11] Matthew Rowles,Brian O'Connor. Chemical optimisation of the compressive strength of aluminosilicate geopolymers synthesised by sodium silicate activation of metakaolinite[J]. Journal of Materials Chemistry,2003,13(5):1161-1165.
[12] Xu H,Deventer J S J V,Lukey G C. Effect of Alkali Metals on the Preferential Geopolymerization of Stilbite/Kaolinite Mixtures[J]. Industrial&Engineering Chemistry Research,2001,40(17):3749-3756.
[13]彭晖,李树霖,蔡春声,等.偏高岭土基地质聚合物的配合比及养护条件对其力学性能及凝结时间的影响研究[J].硅酸盐通报,2014,33(11):2809-2817,2827.
[14]李款,卢都友,李孟浩,等.水用量对偏高岭土基地聚合物微观结构及反应过程的影响[J].硅酸盐学报,2016,44(02):226-231.
[15] P. Duxson,A. Fernández-Jiménez,J. L. Provis. Geopolymer technology:the current state of the art[J]. Journal of Materials Science,2007,42(9):2917-2933.
[16]李维,水对碱激发地质聚合物微观结构及性能的影响[D].广西:广西大学,2018.