矿物掺合料和CLDH对水泥基材料氯离子固化性能研究
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摘要
采用等温吸附平衡方法,研究了单掺和复掺粉煤灰、矿渣和焙烧层状双金属氢氧化物(CLDH)对水泥基材料氯离子固化性能的影响,并借助XRD对影响机理进行分析.结果表明:单掺范围为15%～45%情况下,随着粉煤灰和矿粉掺量增加,水泥基固化氯离子的量先增大后减小,当粉煤灰和矿粉的掺量在30%时,其固化氯离子的能力较好且都优于纯水泥对氯离子的固化效果;水泥基材料氯离子固化量随着CLDH掺量的增加而增加;但是粉煤灰和矿渣依次与CLDH复掺,复掺效果不佳,其复掺效果不如单掺粉煤灰或矿渣对氯离子的固化效果好.研究成果对以后复掺技术在海工混凝土中的有效、合理使用提供相应的参考.
In this paper,The effects of single admixture and remixed fly ash, slag and calcined double metal hydride(CLDH) on the properties of chloride ion curing of cement based materials were researched after 28 days by use of equilibrium experiment. Then, the effect mechanism was analyzed by XRD,and the results shown that, with the addition of fly ash and mineral powder, the amount of the solidified chloride ions increased first and then decreased with the addition of fly ash and mineral powder. When the fly ash and mineral powder were added to 30%, the solidification of chloride ions was better and better than that of pure cement for the curing effect of chlorine ions. The chloride ion solidification volume of cement based materials increased with the increase of CLDH content. But the fly ash and slag are mixed with CLDH in turn, and the mixed results are not very good, and the effect of the compound effect is not as good as the curing effect of a single fly ash or slag on chloride ions.The research results provide relevant reference for the effective and rational use of the recombination technology in marine concrete.
In this paper,The effects of single admixture and remixed fly ash, slag and calcined double metal hydride(CLDH) on the properties of chloride ion curing of cement based materials were researched after 28 days by use of equilibrium experiment. Then, the effect mechanism was analyzed by XRD,and the results shown that, with the addition of fly ash and mineral powder, the amount of the solidified chloride ions increased first and then decreased with the addition of fly ash and mineral powder. When the fly ash and mineral powder were added to 30%, the solidification of chloride ions was better and better than that of pure cement for the curing effect of chlorine ions. The chloride ion solidification volume of cement based materials increased with the increase of CLDH content. But the fly ash and slag are mixed with CLDH in turn, and the mixed results are not very good, and the effect of the compound effect is not as good as the curing effect of a single fly ash or slag on chloride ions.The research results provide relevant reference for the effective and rational use of the recombination technology in marine concrete.
引文
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[9] TANG L,NILSSON L O.Chloride binding capacity and binding isotherms of OPC pastes and mortars[J].Cement and Concrete Research,1993,23(2):247-253.
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[11] 中华人民共和国水利部.水工混凝土规程:SL352-2006[S].北京:中国水利水电出版社,2006.Ministry of Water Resources,People’s Republi of China.Testing code for hydraulic concrete:SL352-2006[S].Beijing:China Water Conservancy and Hydropower Press,2006.
[12] 余红发,翁智财,孙伟,等.矿渣掺量对混凝土氯离子结合能力的影响[J].硅酸盐学报.2007.35(6):801-806.YU Hongfa,WENG Zhicai,SUN Wei,et al.Influences of slag content on chlorine ion binding capacity of concrete[J].Journal of The Chinese Ceramic Society,2007.35(6):801-806.
[13] CHEN Y,SHUI Z,CHEN W,et al.Chloride binding of synthetic Ca-Al-NO3 LDHs in hardened cement paste[J].Construction and Building Materials,2015,93:1051-1058.
[14] YANG Z,FISCHER H,POLDER R.Synthesis and characterization of modified hydrotalcites and their ion exchange characteristics in chloride rich simulated concrete pore solution[J].Cement and Concrete Composites,2014,47(0):87-93.
[15] 段平.层状双氢氧化物改善混凝土耐久性能的机理及其应用研究[D].武汉:武汉理工大学,2014.DUAN Ping.Research on modification mechanism and the application of layered double hydroxides for durability of concrete[D].Wuhan:Wuhan University of Technology,2014.
[16] YOON S,MOON J,BAE S,et al.Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste[J].Materials Chemistry and Physics,2014,145(3):376-386.
[2] 耿健,莫利伟.碳化环境下矿物掺合料对固化态氯离子稳定性的影响[J].硅酸盐学报,2014,42(4):500-505.GENG Jian,MO Liwei.Effect of supplementary cementitious materials on stability of bound chloride ion under carbonation condition[J].Journal of The Chinese Ceramic Society,2014,42(4):500-505.
[3] 冯跃,耿健,李东.焙烧水滑石对砂浆中氯离子渗透的影响[J].硅酸盐通报,2018,37(4):1195-1199.FENG Yue,GENG Jian,LI Dong.Influence of calcined hydrotalcite on chloride penetration in[J].Mortar Bulletin of the Chinese Ceramic Society,2018,37(4):1195-1199.
[4] 孙金陆,甄卫军,李进.LDHs材料的结构、性质及其应用研究进展[J].化工进展,2013,32(3):610-616.SUN Jinlu,ZHEN Weijun,LI Jin.Structure,properties and applications of LDHs[J].Chemical Industry and Engineering Progress,2013,32(3):610-616.
[5] 李克超,王承明,汪雪瑞,等.焙烧镁铝水滑石对棉粕水提液中棉酚的吸附性能及吸附机理研究[J].中国粮油学报,2018,33(2):82-88.LI Kechao,WANG Chengming,WANG Xuerui,et al.Adsorption properties and mechanism of gossypol in extract of cottonseed meal by Mg-Al calcined layered double hydroxide[J].Journal of the Chinese Cereals and Oils Association,2018,33(2):82-88.
[6] JITENDRA A Jain,NARAYANAN Neithalath.Chloride transport in fly ash and glass powder modified concretes-Influence of test methods on microstructure[J].Cement and Concrete Research,2010(32):14.
[7] 莫利伟,耿健,柳俊哲,等.粉煤灰和矿渣双掺对水泥基材料固化氯离子能力的研究[J].硅酸盐通报,2013,32(12):45-50.MO Liwei,GENG Jian,LIU Junzhe,et al.Study on fly ash and slag on binding of chloride ion into cement based materials[J].MortarBulletin of the Chinese Ceramic Society,2013,32(12):45-50.
[8] 勾密峰,黄飞,管学茂.矿渣对氯离子的固化作用[J],材料导报,2014(10):120-122.GOU Mifeng,HUANG Fei,GUAN Xuemao.The binding effect of slag on the chloride ions[J].Materials Review,2014(10):120-122.
[9] TANG L,NILSSON L O.Chloride binding capacity and binding isotherms of OPC pastes and mortars[J].Cement and Concrete Research,1993,23(2):247-253.
[10] ANDREJ Ipavec,TOMA? Vuk,ROMAN Gabrov?ek.Chloride binding into hydrated blended cements:The influence of limestone and alkalinity[J].Cement and Concrete Research,2013(48):74-85.
[11] 中华人民共和国水利部.水工混凝土规程:SL352-2006[S].北京:中国水利水电出版社,2006.Ministry of Water Resources,People’s Republi of China.Testing code for hydraulic concrete:SL352-2006[S].Beijing:China Water Conservancy and Hydropower Press,2006.
[12] 余红发,翁智财,孙伟,等.矿渣掺量对混凝土氯离子结合能力的影响[J].硅酸盐学报.2007.35(6):801-806.YU Hongfa,WENG Zhicai,SUN Wei,et al.Influences of slag content on chlorine ion binding capacity of concrete[J].Journal of The Chinese Ceramic Society,2007.35(6):801-806.
[13] CHEN Y,SHUI Z,CHEN W,et al.Chloride binding of synthetic Ca-Al-NO3 LDHs in hardened cement paste[J].Construction and Building Materials,2015,93:1051-1058.
[14] YANG Z,FISCHER H,POLDER R.Synthesis and characterization of modified hydrotalcites and their ion exchange characteristics in chloride rich simulated concrete pore solution[J].Cement and Concrete Composites,2014,47(0):87-93.
[15] 段平.层状双氢氧化物改善混凝土耐久性能的机理及其应用研究[D].武汉:武汉理工大学,2014.DUAN Ping.Research on modification mechanism and the application of layered double hydroxides for durability of concrete[D].Wuhan:Wuhan University of Technology,2014.
[16] YOON S,MOON J,BAE S,et al.Chloride adsorption by calcined layered double hydroxides in hardened Portland cement paste[J].Materials Chemistry and Physics,2014,145(3):376-386.
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