抗腐性氯氧镁水泥混凝土在高寒、高盐渍地区的研究及应用
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摘要
本文主要介绍了氯氧镁水泥(MOC)混凝土的抗腐性能和在高寒、高盐渍地区工程应用的力学性能变化规律。根据研究发现,砂浆MOC和MOC混凝土经过老卤浸泡后,力学性能没有明显的降低,得到了很好的保留,MOC具有一定的抗盐卤腐蚀性能;从MOC混凝土的路面应用得到MOC混凝土在养护7 d即达到工程强度,满足工程应用标准,且其强度在盐渍地区保持相对稳定,证明了混凝土MOC的工程应用价值及应用于西部高寒和高盐渍地区的潜力和应用前景。
This paper mainly introduces the changes of mechanical properties of laboratory MOC concrete and engineering application concrete MOC in cold and salty areas. According to the research of MOC concrete,the mechanical properties of mortar MOC and concrete MOC have not been significantly reduced after being soaked by the aging brine,and they have been well retained. Therefore,MOC has good salt attack performance.From the application of concrete MOC pavement,it can be obtained that the MOC concrete meets the engineering strength within 3 days curing and it meets the engineering application standard,and its strength remains relatively stable in the saline area,which proves the engineering application value of concrete MOC and its potential and application prospect in high cold and salinity areas in the west.
This paper mainly introduces the changes of mechanical properties of laboratory MOC concrete and engineering application concrete MOC in cold and salty areas. According to the research of MOC concrete,the mechanical properties of mortar MOC and concrete MOC have not been significantly reduced after being soaked by the aging brine,and they have been well retained. Therefore,MOC has good salt attack performance.From the application of concrete MOC pavement,it can be obtained that the MOC concrete meets the engineering strength within 3 days curing and it meets the engineering application standard,and its strength remains relatively stable in the saline area,which proves the engineering application value of concrete MOC and its potential and application prospect in high cold and salinity areas in the west.
引文
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[15] He P P,Chi S P,Daniel C W. Comparison of glass powder and pulverized fuel ash for improving the water resistance of magnesium oxychloride cement. Cem Concr Compos,2018(86):98-109.
[16] Li Y,Li Z J,Pei H F,et al. The influence of Fe SO4and KH2PO4on the performance of magnesium oxychloride cement[J].Constr Build Mater,2016(102):233-238.
[2]周园,李丽娟,吴志坚,等.青海盐湖资源开发及综合利用[J].化学进展,2013,25(10):1613-1624.
[3]刘连新.察尔汗盐湖及超盐渍土地区混凝土侵蚀及预防初探[J].建筑材料学报,2001,4(4):395-400.
[4]张汉文.察尔汗盐湖卤水对水泥混凝土侵蚀问题的探讨[J].中国建材研究院刊,1984,(3):33-40.
[5] Deng D H,Zhang C M. The formation mechanism of the hydrate phases in magnesium oxychloride cement[J]. Cem Concr Res,1999,29(9):1365-1371.
[6] Chau C K,Chan J,Li Z J. Influences of fly ash on magnesium oxychloride mortar[J]. Cem Concr Compos,2009,31(4):250-254.
[7] Ba H J,Guan H. Influence of Mg O/Mg Cl2molar ratio on phase stability of magnesium oxychloride cement[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed. 2009,24(3):476-481.
[8] Li Z J,Chau C K. Influence of molar ratios on properties of magnesium oxychloride cement[J]. Cem Concr Res,2007(37):866-870.
[9]邓德华. Mg O/Mg Cl2摩尔比对玻璃纤维氯氧镁水泥复合材料力学性能的影响[J].混凝土与水泥制品,2001(5):35-37.
[10] Wang F Z,Yang L,Guan L,et al. Microstructure and properties of cement foams prepared by magnesium oxychloride cement[J]. Journal of Wuhan University of Technology-Mater.Sci. Ed. 2015,30(2):331-337.
[11]肖斌,邱战洪,陈明辉,等.氯氧镁水泥配合比的试验研究[J].台州学院学报,2012,34(3):45-50.
[12] Lan M P,Gregory M D,Peter S F. Assessing the carbon sequestration potential of magnesium oxychloride cement building materials[J]. Cem Concr Compos,2017(78):97-107.
[13] Deng D H. The mechanism for soluble phosphates to improve the water resistance of magnesium oxychloride cement[J].Cem Concr Res,2003,33(9):1311-1317.
[14] Zhang C M,Deng D H. Research on the water-resistance of magnesium oxychloride cement,I:the Stability of the reaction products of magnesium oxychloride cement in water[J]. J Wuhan Univer Techno,1994,9(3):51-59.
[15] He P P,Chi S P,Daniel C W. Comparison of glass powder and pulverized fuel ash for improving the water resistance of magnesium oxychloride cement. Cem Concr Compos,2018(86):98-109.
[16] Li Y,Li Z J,Pei H F,et al. The influence of Fe SO4and KH2PO4on the performance of magnesium oxychloride cement[J].Constr Build Mater,2016(102):233-238.