硫铝酸盐水泥水化反应的表观活化能计算
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摘要
基于Arrhenius公式,通过测定不同养护温度(20,30,40,50℃)下硫铝酸盐水泥浆体的水化热,利用指数法和线性双曲法分别计算其水化反应的表观活化能,同时研究了硅灰和高钙粉煤灰对硫铝酸盐水泥水化反应表观活化能的影响.结果表明:采用指数法和线性双曲法计算得出的硫铝酸盐水泥水化反应的表观活化能分别为45.54,55.44kJ·mol-1;在所测试的所有试样中,采用指数法计算所得的表观活化能均低于采用线性双曲法计算所得之值;采用2.5%,5.0%硅灰或40.0%高钙粉煤灰等质量替代水泥后,硫铝酸盐水泥复合体系的表观活化能增大,但以20.0%高钙粉煤灰等质量替代水泥后,该体系的表观活化能降低.
Based on Arrhenius equation,the apparent activation energy of calcium sulfoaluminate cement pastes were calculated from the heat of hydration cured at temperatures of 20,30,40,50℃.The apparent activation energy of hydration reaction was calculated by exponential method and linear hyperbolic method,respectively.Meanwhile,the influence of high calcium fly ash and silica fume on the apparent activation energy of hydration reaction of calcium sulfoaluminate cement pastes were also investigated.The results show that the apparent activation energy of calcium sulfoaluminate cement calculated by exponential method and linear hyperbolic method is 45.54 and 55.44 kJ·mol-1 respectively.By comparisons,the apparent activation energy calculated by exponential method is lower than that of the linear hyperbolic method in all samples.In addition,the apparent activation energy of cement composite system increases when the cement mix with 2.5%,5.0% silica fume or 40.0% high calcium fly ash,but with the addition of 20.0%high calcium fly ash in the composite system,the apparent activation energy of the cement composite system decreases.
Based on Arrhenius equation,the apparent activation energy of calcium sulfoaluminate cement pastes were calculated from the heat of hydration cured at temperatures of 20,30,40,50℃.The apparent activation energy of hydration reaction was calculated by exponential method and linear hyperbolic method,respectively.Meanwhile,the influence of high calcium fly ash and silica fume on the apparent activation energy of hydration reaction of calcium sulfoaluminate cement pastes were also investigated.The results show that the apparent activation energy of calcium sulfoaluminate cement calculated by exponential method and linear hyperbolic method is 45.54 and 55.44 kJ·mol-1 respectively.By comparisons,the apparent activation energy calculated by exponential method is lower than that of the linear hyperbolic method in all samples.In addition,the apparent activation energy of cement composite system increases when the cement mix with 2.5%,5.0% silica fume or 40.0% high calcium fly ash,but with the addition of 20.0%high calcium fly ash in the composite system,the apparent activation energy of the cement composite system decreases.
引文
[1]傅献彩,沈文霞,姚天扬,等.物理化学(下册)[M].第5版.北京:高等教育出版社,2006:747-756.FU Xiancai,SHEN Wenxia,YAO Tianyang,et al.Physical chemistry(VolumeⅡ)[M].5th ed.Beijing:Higher Education Press,2006:747-756.(in Chinese)
[2] ASTM.ASTM C1074-11.Standard practice for estimating concrete strength by the maturity method[S].West Conshohocken PA:ASTM International,2011:1-10.
[3] XU Q W,JIONG H,RUIZ J M,et al.Isothermal calorimetry testes and modeling of cement hydration parameters[J].Thermochimica Acta,2010,499(1):91-99.
[4] JULIO-BETANCOURT G,HOOTON R.Study of the Joule effect on rapid chloride permeability values and evaluation of related electrical properties of concretes[J].Cement and Concrete Research,2004,34(6):1007-1015.
[5]魏小胜,肖莲珍.电阻率法测定硅酸盐水泥水化活化能[J].硅酸盐学报,2011,39(4):676-681.WEI Xiaosheng,XIAO Lianzhen.Activation energy of Portland cement hydration by electrical resistivity measurement[J].Journal of the Chinese Ceramic Society,2011,39(4):676-681.(in Chinese)
[6] SIDDIQUI S,RIDING K Y.Effect of calculation methods on cement paste and mortar apparent activation energy[J].Advances in Civil Engineering Materials,2012,1(1):1-17.
[7]董继红,李占印.水泥水化放热行为的温度效应[J].建筑材料学报,2010,13(5):675-677.DONG Jihong,LI Zhanyin.Effect of temperature on heat release behavior of hydration of cement[J].Journal of Building Materials,2010,13(5):675-677.(in Chinese)
[8] NOKKEN M R.Electrical conductivity to determine maturity and activation energy in concretes[J].Materials and Structures,2016,49(6):2209-2221.
[9] CARINO N J,LEW H S.The maturity method:From theory to application[C]//Proceedings of the 2001Structures Congress and Exposition.Washington,D.C.:American Society of Civil Engineers,2001:1-19.
[10] HE Z,YANG H M,LIU M Y.Hydration mechanism of sulphoaluminate cement[J].Journal of Wuhan University of Technology(Materials Science),2014,29(1):70-74.
[11]韩建国,阎培渝.锂化合物对硫铝酸盐水泥水化历程的影响[J].硅酸盐学报,2010,38(4):608-614.HAN Jianguo,YAN Peiyu.Influence of lithium compound on calcium sulphoaluminate cement hydration process[J].Journal of the Chinese Ceramic Society,2010,38(4):608-614.(in Chinese)
[12]周华新,刘加平,刘建忠.低碱硫铝酸盐水泥水化硬化过程的温度敏感性及其对策[J].混凝土,2011(12):9-11.ZHOU Huaxin,LIU Jiaping,LIU Jianzhong.Analysis of temperature sensitivity of the low alkalinity sulphoaluminate cement and its countermeasures[J].Concrete,2011(12):9-11.(in Chinese)
[13] DENG M,TANG M S.Formation and expansion of ettringite crystals[J].Cement and Concrete Research,1994,24(1):119-122.
[14]胡红梅,马保国.混凝土矿物掺合料[M].北京:中国电力出版社,2016:2-5.HU Hongmei,MA Baoguo.Concrete mineral admixture[M].Beijing:China Electric Power Press,2016:2-5.(in Chinese)
[15]王燕谋,苏慕珍,张量.硫铝酸盐水泥[M].北京:北京工业大学出版社,1999:159-160.WANG Yanmou,SU Muzhen,ZHANG Liang.Sulphoaluminate cement[M].Beijing:Beijing University of Technology Press,1999:159-160.
[16]施惠生.高钙粉煤灰的本征性质与水化特性[J].同济大学学报(自然科学版),2003,31(12):1440-1443.SHI Huisheng.Research on intrinsic characteristics and hydration properties of fly ash with high calcium oxide[J].Journal of Tongji University(Natural Science),2003,31(12):1440-1443.(in Chinese)
[17] AMAL R J,MELINDA L J,KIMBERLY E K.Nanoparticles and apparent activation energy of Portland cement[J].Journal of the American Ceramic Society,2014,97(5):1534-1542.
[18]施惠生,范付忠,冯涛.高钙粉煤灰混合水泥体积稳定性的研究[J].建筑材料学报,1999,2(2):93-98.SHI Huisheng,FAN Fuzhong,FENG Tao.Research on the volume stability of blended cement with high calcium fly ash[J].Journal of Building Materials,1999,2(2):93-98.(in Chinese)
[2] ASTM.ASTM C1074-11.Standard practice for estimating concrete strength by the maturity method[S].West Conshohocken PA:ASTM International,2011:1-10.
[3] XU Q W,JIONG H,RUIZ J M,et al.Isothermal calorimetry testes and modeling of cement hydration parameters[J].Thermochimica Acta,2010,499(1):91-99.
[4] JULIO-BETANCOURT G,HOOTON R.Study of the Joule effect on rapid chloride permeability values and evaluation of related electrical properties of concretes[J].Cement and Concrete Research,2004,34(6):1007-1015.
[5]魏小胜,肖莲珍.电阻率法测定硅酸盐水泥水化活化能[J].硅酸盐学报,2011,39(4):676-681.WEI Xiaosheng,XIAO Lianzhen.Activation energy of Portland cement hydration by electrical resistivity measurement[J].Journal of the Chinese Ceramic Society,2011,39(4):676-681.(in Chinese)
[6] SIDDIQUI S,RIDING K Y.Effect of calculation methods on cement paste and mortar apparent activation energy[J].Advances in Civil Engineering Materials,2012,1(1):1-17.
[7]董继红,李占印.水泥水化放热行为的温度效应[J].建筑材料学报,2010,13(5):675-677.DONG Jihong,LI Zhanyin.Effect of temperature on heat release behavior of hydration of cement[J].Journal of Building Materials,2010,13(5):675-677.(in Chinese)
[8] NOKKEN M R.Electrical conductivity to determine maturity and activation energy in concretes[J].Materials and Structures,2016,49(6):2209-2221.
[9] CARINO N J,LEW H S.The maturity method:From theory to application[C]//Proceedings of the 2001Structures Congress and Exposition.Washington,D.C.:American Society of Civil Engineers,2001:1-19.
[10] HE Z,YANG H M,LIU M Y.Hydration mechanism of sulphoaluminate cement[J].Journal of Wuhan University of Technology(Materials Science),2014,29(1):70-74.
[11]韩建国,阎培渝.锂化合物对硫铝酸盐水泥水化历程的影响[J].硅酸盐学报,2010,38(4):608-614.HAN Jianguo,YAN Peiyu.Influence of lithium compound on calcium sulphoaluminate cement hydration process[J].Journal of the Chinese Ceramic Society,2010,38(4):608-614.(in Chinese)
[12]周华新,刘加平,刘建忠.低碱硫铝酸盐水泥水化硬化过程的温度敏感性及其对策[J].混凝土,2011(12):9-11.ZHOU Huaxin,LIU Jiaping,LIU Jianzhong.Analysis of temperature sensitivity of the low alkalinity sulphoaluminate cement and its countermeasures[J].Concrete,2011(12):9-11.(in Chinese)
[13] DENG M,TANG M S.Formation and expansion of ettringite crystals[J].Cement and Concrete Research,1994,24(1):119-122.
[14]胡红梅,马保国.混凝土矿物掺合料[M].北京:中国电力出版社,2016:2-5.HU Hongmei,MA Baoguo.Concrete mineral admixture[M].Beijing:China Electric Power Press,2016:2-5.(in Chinese)
[15]王燕谋,苏慕珍,张量.硫铝酸盐水泥[M].北京:北京工业大学出版社,1999:159-160.WANG Yanmou,SU Muzhen,ZHANG Liang.Sulphoaluminate cement[M].Beijing:Beijing University of Technology Press,1999:159-160.
[16]施惠生.高钙粉煤灰的本征性质与水化特性[J].同济大学学报(自然科学版),2003,31(12):1440-1443.SHI Huisheng.Research on intrinsic characteristics and hydration properties of fly ash with high calcium oxide[J].Journal of Tongji University(Natural Science),2003,31(12):1440-1443.(in Chinese)
[17] AMAL R J,MELINDA L J,KIMBERLY E K.Nanoparticles and apparent activation energy of Portland cement[J].Journal of the American Ceramic Society,2014,97(5):1534-1542.
[18]施惠生,范付忠,冯涛.高钙粉煤灰混合水泥体积稳定性的研究[J].建筑材料学报,1999,2(2):93-98.SHI Huisheng,FAN Fuzhong,FENG Tao.Research on the volume stability of blended cement with high calcium fly ash[J].Journal of Building Materials,1999,2(2):93-98.(in Chinese)