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预养护对二氧化碳养护混凝土过程及显微结构的影响

DOI: 10.7521/j.issn.0454-5648.2014.08.07

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Abstract:

研究了干硬性混凝土经干燥环境预养护后的剩余水灰比对其二氧化碳养护过程及显微结构发展的影响。用热重分析和Fourier红外光谱等方法对二氧化碳养护砂浆过程中形成的产物进行了定性和定量分析,并利用压汞测孔仪分别测试了二氧化碳养护3h和自然养护5h的砂浆的孔径分布。结果表明剩余水灰比为0.16~0.20时二氧化碳养护程度及抗压强度最高;养护过程中反应物为水泥颗粒及少量水化产物,生成方解石及硅胶;养护程度较高的试件生成的碳酸钙结晶度较高;二氧化碳养护后混凝土孔隙率明显降低,50~1000nm的毛细孔含量降低,养护程度越高的混凝土,孔结构改善程度越高。

References

[1]   MONKMAN S, SHAO Y, SHI C. Carbonated ladle slag fines for carbon uptake and sand substitute[J]. J Mater Civ Eng, 2009, 21(11): 657-665.
[2]   ZHAN, B, POON C,SHI C. CO2 Curing for Improving the Properties of Concrete Blocks Containing Recycled Aggregates[J]. Cem Concr Compos, 2013,42:1-8.
[3]   SHI C, WANG D, HE F, et al. Weathering properties of CO2-cured concrete blocks[J]. Resour Conserv Recyc, 2012, 65: 11-17.
[4]   邹庆焱.二氧化碳养护混凝土技术研究[D].长沙:中南大学,2008.
[5]  ZOU Qingyan. Study on CO2 curing of concrete(in Chinese, dissertation).Changsha: Central South University, 2008.
[6]   邹庆焱,史才军,郑克仁,等.预养护对砌块混凝土二氧化碳养护的影响[J].建筑材料学报,2008, 11(1): 116-120.
[7]  ZOU Qingyan, SHI Caijun, ZHENG Keren, et al. J Build Mater (in Chinese), 2008, 11(1): 116-120.
[8]   史才军,邹庆焱,何富强.二氧化碳养护混凝土的动力学研究[J].硅酸盐学报,2010, 38(7): 1179-1184.
[9]  SHI Caijun, ZOU Qingyan, HE Fuqiang. J Chin Ceram Soc, 2010, 38(7): 1179-1184.
[10]   涂贞军.混凝土的二氧化碳养护技术研究[D].长沙:湖南大学,2010.
[11]  TU Zhenjun. Study on CO2 curing of concrete(in Chinese, dissertation).Changsha: Hunan University, 2010.
[12]   YOUNG J F, BERGER R L, BREESE J. Accelerated curing of compacted calcium silicate mortars on exposure to CO2[J]. J Am Ceram Soc, 1974, 57(9): 394-397.
[13]   MONKMAN S, SHAO Y. Assessing the carbonation behavior of cementitious materials[J]. J Mater Civ Eng, 2006, 18(6): 768-776.
[14]   SHI C, HE F, WU Y. Effect of pre-conditioning on CO2 curing of lightweight concrete blocks mixtures[J]. Constr Build Mater, 2012, 26(1): 257-267.
[15]   MORSHED A Z, SHAO Y. Influence of moisture content on CO2 uptake in lightweight concrete subject to early carbonation[J]. J Sustainable Cement-Based Mater, 2013 2(2): 144-160.
[16]   SHAO Y, SHI C. Carbonation curing for making concrete products-an old concept and a renewed interest[C]//Proc 6th Int Symp Cem Concr, 2006, 2: 823-830.
[17]   PAPADAKIS V G, VAYENAS C G, FARDIS M N. A reaction engineering approach to the problem of concrete carbonation[J]. AIChE J, 1989, 35(10): 1639-1650.
[18]   VAN BALEN K. Carbonation reaction of lime, kinetics at ambient temperature[J]. Cem Concr Res, 2005, 35(4): 647-657.
[19]   SHORT N R, PURNELL P, PAGE C L. Preliminary investigations into the supercritical carbonation of cement pastes[J]. J Mater Sci, 2001, 36(1): 35-41.
[20]   HERMAWAN D, HATA T, UMEMURA K, et al. Rapid production of high-strength cement-bonded particleboard using gaseous or supercritical carbon dioxide[J]. J Wood Sci, 2001, 47(4): 294-300.
[21]   KNOPF F C, ROY A, SAMROW H A, et al. High-pressure molding and carbonation of cementitious materials[J]. Ind Eng Chem Res, 1999, 38(7): 2641-2649.
[22]   SAETTA A V, SCHREFLER B A, VITALIANI R V. The carbonation of concrete and the mechanism of moisture, heat and carbon dioxide flow through porous materials[J]. Cem Concr Res, 1993, 23(4): 761-772.
[23]   STEINOUR H H. Some effects of carbon dioxide on mortars and concrete-discussion[J]. J Am Concr Inst, 1959, 30: 905-907.
[24]   DIAMOND S. Mercury porosimetry: an inappropriate method for the measurement of pore size distributions in cement-based materials [J]. Cem Concr Res, 2000, 30(10): 1517-1525.
[25]   YE G, LIU X, DE SCHUTTER G, et al. Influence of limestone powder used as filler in SCC on hydration and microstructure of cement pastes[J]. Cem Concr Comps, 2007, 29(2): 94-102.
[26]   YLMEN R, JAGLID U, STEENARI B M, et al. Early hydration and setting of Portland cement monitored by IR, SEM and Vicat techniques[J]. Cem Concr Res, 2009, 39(5): 433-439.
[27]   MOLLAH M Y A, YU W, SCHENNACH R, et al. A Fourier transform infrared spectroscopic investigation of the early hydration of Portland cement and the influence of sodium lignosulfonate[J]. Cem Concr Res, 2000, 30(2): 267-273.
[28]   ZHANG Z, WANG H, PROVIS J L. Quantitative study of the reactivity of fly ash in geopolymerization by FTIR[J]. J Sustainable Cement-Based Mater, 2012, 1(4): 154-166.
[29]   YANG T, YAO X, ZHANG Z, et al. Mechanical property and structure of alkali-activated fly ash and slag blends[J]. J Sustainable Cement-Based Mater, 2012, 1(4): 167-178.
[30]   FERN ANDEZ-CARRASCO L, TORRENS-MARTIN D, MORALES L M, et al. Infrared spectroscopy in the analysis of building and construction materials//:Infrared Spectroscopy—Materials Science, Engineering and Technology[M]. INTECH, 2012: 369-82.
[31]   EL-HASSAN H, SHAO Y, GHOULEH Z. Reaction products in carbonationcured lightweight concrete[J]. J Mater Civ Eng, 2013, 25(6): 799-809.
[32]   GOTO S, SUENAGA K, KADO T, et al. Calcium silicate carbonation products[J]. J Am Ceram Soc, 1995, 78(11): 2867-2872.
[33]   BENTZ D P, LURA P, ROBERTS J W. Mixture proportioning for internal curing[J]. Concr Int, 2005, 27(2): 35-40.
[34]   BERGER R L, KLEMM W A. Accelerated curing of cementitious systems by carbon dioxide: Part II. Hydraulic calcium silicates and aluminates[J]. Cem Concr Res, 1972, 2(6): 647-652.
[35]   WAUHOP B J. Curing of Concrete Block-A Study of Energy Consumption, Research Report[R]. Herndon, VA, USA,1980.
[36]   SHI C, WU Y. Studies on some factors affecting CO2 curing of lightweight concrete products[J]. Resour Conserv Recycl, 2008, 52(8): 1087-1092.
[37]   SHI C, LIU M, HE P, et al. Factors affecting kinetics of CO2 curing of concrete[J]. J Sustainable Cement-Based Mater, 2012, 1(1-2): 24-33.
[38]   SHI C, HE F. Properties and Microstructure of CO2 Cured Concrete Blocks[C]//Conf Waste Eng Manage-ICWEM.2010: 96-107.
[39]   吴昊泽,周宗辉,叶正茂,等.加速碳化养护钢渣混合水泥制备钢渣砖[J].新型建筑材料,2009, 8: 4-6.
[40]  WU Haoze, ZHOU Zonghui, YE Zhengmao, et al. New Build Mater (in Chinese), 2009, 8: 4-6.
[41]   SHI C, WU Y. CO2 curing of concrete blocks[J]. Concr Int, 2009, 31(02): 39-43.
[42]   SHI C, ZOU Q. Use of CO2 as an Accelerated Curing Agent for Concrete Blocks[J]. Key Eng Mater, 2009, 400: 81-87.

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