碱矿渣水泥石碳化产物研究
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摘要
碱矿渣水泥水化产物不同于硅酸盐水泥,会产生不同的碳化行为。以水玻璃与NaOH为碱组分制备碱矿渣水泥石,采用X-射线衍射(XRD)、红外光谱(FT-IR)与综合热分析(TG-DSC)研究了碱矿渣水泥石的碳化产物。结果表明:碱矿渣水泥石碳化生成的CaCO3的存在形式主要为方解石,球霰石和文石含量较少,随碳化龄期延长,文石与球霰石含量增加;以模数1.0~1.5的水玻璃为碱组分的碱矿渣水泥石碳化后,出现钠的碳酸盐结晶相;碱矿渣水泥石碳化脱钙后生成富硅的C-S-H凝胶,C-S-H凝胶的聚合度增加。
Hydration products of alkali-activated slag cement is different from Portland cement,so it exhibits different carbonization behavior. Alkali-activated slag cement stone( AASS) prepared with water glass and Na OH was used to investigate the carbonation products by using XRD,FT-IR and TG-DSC analysis. The results show that as carbonation products,Ca CO3 exists mainly in the form of calcite and the content of vaterite and aragonite is less. With the process of carbonation,vaterite and aragonite increase.When water glass with module of 1. 0-1. 5 is used as activator,carbonate of sodium is detected in carbonation products. After carbonation,C-S-H gel decalcifies and turns into C-S-H gel rich in silicon and polymerization degree of C-S-H gel increases.
Hydration products of alkali-activated slag cement is different from Portland cement,so it exhibits different carbonization behavior. Alkali-activated slag cement stone( AASS) prepared with water glass and Na OH was used to investigate the carbonation products by using XRD,FT-IR and TG-DSC analysis. The results show that as carbonation products,Ca CO3 exists mainly in the form of calcite and the content of vaterite and aragonite is less. With the process of carbonation,vaterite and aragonite increase.When water glass with module of 1. 0-1. 5 is used as activator,carbonate of sodium is detected in carbonation products. After carbonation,C-S-H gel decalcifies and turns into C-S-H gel rich in silicon and polymerization degree of C-S-H gel increases.
引文
[1]Villain G,Mickal T,Gérard P.Measurement methods of carbonation profiles in concrete:Thermogravimetry,chemical analysis and gammadensimetry[J].Cem.Concr.Res,2007,37(8):1182-1192.
[2]钟白茜,程麟,郭斌.用IR方法研究硅酸钙水化产物的碳化[J].南京工业大学学报(自然科学版),1982,(2):39-43.
[3]郭斌,闵盘荣,王国宾.水化硅酸钙的碳化作用[J].硅酸盐学报,1984,12(3):287-295.
[4]Fernández Bertos M,Simons S J R,Hills C D,et al.A review of accelerated carbonation technology in the treatment of cement-based materials and sequestration of CO2[J].Journal of Hazardous Materials,2004,112(3):193-205.
[5]孙抱真,苏而达.水化硅酸钙的结晶度与碳化速度[J].硅酸盐学报,1984,12(3):281-286.
[6]何娟.碱矿渣水泥石碳化行为及机理研究[D].重庆:重庆大学博士学位论文,2011.
[7]Puertas F,Palacios M,Vazquez T.Carbonation process of alkali-activated slag mortars[J].J.MATER SCI.,2006,(41):3071-3082.
[8]Mozgawa W,Deja J.Spectroscopic studies of alkaline activated slag geopolymers[J].Journal of Molecular Structure,2009,924-926(C):434-441.
[9]Bensted J,Varma S P.Infrared and raman spectroscopy in cement chemistry-iscellaneous applications[J].World Cement Tochnology,1977,8(1):16,18-20.
[10]杨南如,岳文海.无机非金属材料图谱手册[M].武汉:武汉工业大学出版社,2000.
[2]钟白茜,程麟,郭斌.用IR方法研究硅酸钙水化产物的碳化[J].南京工业大学学报(自然科学版),1982,(2):39-43.
[3]郭斌,闵盘荣,王国宾.水化硅酸钙的碳化作用[J].硅酸盐学报,1984,12(3):287-295.
[4]Fernández Bertos M,Simons S J R,Hills C D,et al.A review of accelerated carbonation technology in the treatment of cement-based materials and sequestration of CO2[J].Journal of Hazardous Materials,2004,112(3):193-205.
[5]孙抱真,苏而达.水化硅酸钙的结晶度与碳化速度[J].硅酸盐学报,1984,12(3):281-286.
[6]何娟.碱矿渣水泥石碳化行为及机理研究[D].重庆:重庆大学博士学位论文,2011.
[7]Puertas F,Palacios M,Vazquez T.Carbonation process of alkali-activated slag mortars[J].J.MATER SCI.,2006,(41):3071-3082.
[8]Mozgawa W,Deja J.Spectroscopic studies of alkaline activated slag geopolymers[J].Journal of Molecular Structure,2009,924-926(C):434-441.
[9]Bensted J,Varma S P.Infrared and raman spectroscopy in cement chemistry-iscellaneous applications[J].World Cement Tochnology,1977,8(1):16,18-20.
[10]杨南如,岳文海.无机非金属材料图谱手册[M].武汉:武汉工业大学出版社,2000.