多离子复合掺杂对阿利特水化活性的影响
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摘要
采用热释光、微量热分析和红外光谱,研究了熟料中常见的7种典型离子复合掺杂对阿利特水化活性的影响.结果表明:不同离子固溶所致缺陷显著提高了阿利特早期水化活性,其中浅能级缺陷较深能级缺陷对阿利特早期水化活性的影响更大.异价置换离子在阿利特中固溶形成的缺陷较为复杂,改变了阿利特的缺陷能级分布,对阿利特热释光性有显著影响.阿利特原始热释光性(储藏的亚稳能量)首先取决于阿利特晶型,其次受掺杂离子尤其是异价置换离子的影响显著.阿利特水化活性与原始热释光峰强度的正相关性仅适用于同晶型阿利特.
Effect of seven typical foreign ions in different combinations on hydration reactivity of alite was studied by thermoluminescence(TL),isothermal calorimetry and Fourier transform infrared spectroscopy(FTIR).Results show that the initial hydration reactivity of alite is markedly improved due to the presence of various defects,among which shallow level defects play a more important role than deep level defects.Heterovalent ion replacement has obvious influence on thermoluminescene due to the formation of complex extrinsic defects which result in great changes in the defect-energy-level distribution of alite.It is demonstrated that the intensity of the original thermoluminescene(metastable energy stored in alite)is affected primarily by the polymorphic form of alite,and then affected by foreign ions,especially heterovalent ions.The positive correlation between the hydration reactivity and the original thermoluminescene only applies to alite with the same polymorphic form.
Effect of seven typical foreign ions in different combinations on hydration reactivity of alite was studied by thermoluminescence(TL),isothermal calorimetry and Fourier transform infrared spectroscopy(FTIR).Results show that the initial hydration reactivity of alite is markedly improved due to the presence of various defects,among which shallow level defects play a more important role than deep level defects.Heterovalent ion replacement has obvious influence on thermoluminescene due to the formation of complex extrinsic defects which result in great changes in the defect-energy-level distribution of alite.It is demonstrated that the intensity of the original thermoluminescene(metastable energy stored in alite)is affected primarily by the polymorphic form of alite,and then affected by foreign ions,especially heterovalent ions.The positive correlation between the hydration reactivity and the original thermoluminescene only applies to alite with the same polymorphic form.
引文
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1)文中涉及的水灰比均为质量比.
[2]DUNSTETTER F,de NOIRFONTAINE M N,COURTIAL M.Polymorphism of tricalcium silicate,the major compound of Portland cement clinker:1.Structural data:Review and unified analysis[J].Cement and Concrete Research,2006,36(1):39-53.
[3]张文生,任雪红,欧阳世翕.离子固溶对硅酸三钙结构及性能影响的研究进展[J].硅酸盐学报,2011,39(10):1666-1672.ZHANG Wensheng,REN Xuehong,OUYANG Shixi.Development on ion substitution effect on the crystal structure and properties of tricalcium silicate[J].Journal of the Chinese Ceramic Society,2011,39(10):1666-1672.(in Chinese)
[4]STEPHAN D,WISTUBA S.Crystal structure refinement and hydration behaviour of 3CaO·SiO2solid solutions with MgO,Al2O3and Fe2O3[J].Journal of the European Ceramic Society,2006,26(1/2):141-148.
[5]STEPHAN D,DIKOUNDOU S N,RAUDASHL-SIEBER G.Influence of combined doping of tricalcium silicate with MgO,Al2O3and Fe2O3:Synthesis,grindability,X-ray diffraction and29Si NMR[J].Materials and Structures,2008,41(10):1729-1740.
[6]STEPHAN D,DIKOUNDOU S N,RAUDASHL-SIEBER G.Hydration characteristics and hydration products of tricalcium silicate doped with a combination of MgO,Al2O3 and Fe2O3[J].Thermochimica Acta,2008,472(1/2):64-73.
[7]FIERENS P,TIRLOCQ J,VERHAEGEN J P.Luminescence and hydration of tricalcium silicate[J].Cement and Concrete Research,1973,3(5):549-560.
[8]FIERENS P,TIRLOCQ J,VERHAEGEN J P.Influence du mode dexcitation sur la thermoluminescence du silicate tricalcique[J].Cement and Concrete Research,1973,3(3):227-232.
[9]FIERENS P,VERHAEGEN J P.Energy storage and tricalcium silicate reactivity[J].Cement and Concrete Research,1975,5(1):89.
[10]JUILLAND P,GALLUCCI E,FLATT R,et al.Dissolution theory applied to the induction period in alite hydration[J].Cement and Concrete Research,2010,40(6):831-844.
[11]任雪红,张文生,王彬,等.多组分组合作用下Al2O3掺杂对阿利特结构及活性的影响[J].硅酸盐学报,2012,40(2):200-206.REN Xuehong,ZHANG Wensheng,WANG Bin,et al.Effect of alumina doping on structure and reactivities of alite with multiple foreign ions[J].Journal of the Chinese Ceramic Society,2012,40(2):200-206.(in Chinese)
[12]REN Xuehong,ZHANG Wensheng,OUYANG Shixi,et al.Effect of ferric oxide doping on the structure and reactivity of alite with multiple impurities[J].Journal of the Chinese Ceramic Society,2015,43(8):1120-1128.
[13]任雪红,张文生,欧阳世翕.多离子复合掺杂对阿利特介稳结构的影响[J].硅酸盐学报,2012,40(5):664-670.REN Xuehong,ZHANG Wensheng,OUYANG Shixi.Effect of multiple foreign ions doping on metastable structure of alite[J].Journal of the Chinese Ceramic Society,2012,40(5):664-670.(in Chinese)
[14]MCKEEVER S W S.固体热释光[M].蔡干钢,吴方,王所亭译.北京:原子能出版社,1985:17-219.MCKEEVER S W S.Thermoluminescence of solids[M].Translated by CAI Gangang,WU Fang,WANG Suoting.Beijing:Atomic Energy Press,1985:17-219.(in Chinese)
[15]SAWAKUCHI A O,DEWITT R,FALEIROS F M.Correlation between thermoluminescence sensitivity and crystallization temperatures of quartz:Potential application in geothermometry[J].Radiation Measurements,2011,46(1):51-58.
[16]OMOTOSO O E,IVEY D G,MIKULA R.Characterization of chromium doped tricalcium silicate using SEM/EDS,XRD and FTIR[J].Journal of Hazardous Materials,1995,42(1):87-102.
1)文中涉及的水灰比均为质量比.