早期温湿度条件对柠檬酸改性硫氧镁胶凝材料性能的影响及机理<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.020.023

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Abstract In order to determine early temperature and humidity related stability of citric-acid modified magnesium oxysulfate (CMOs) cementitious materials, the effects and influencing mechanism of different early curing temperature and humidity on mechanical properties and water resistance of CMOs were investigated. The results show that the early mechanical property of CMOs materials increases first and then decreases with the increase of the early curing temperature. At about 35 ℃ the maximum value of flexural strength, compressive strength and water resistance coefficient with 46 days immersion reach 10.4 MPa, 68.0 MPa and 0.9 respectively; While the late mechanical property and water resistance of CMOs material decreases with the increase of the early curing temperature. Furthermore, the mechanical properties and water resistance of CMOs materials with steam curing significantly decreases. At the same time, micro-analysis results show that the hydration reaction of CMOs materials can be more complete because of the increase of the early curing temperature so that the early mechanical properties improve significantly. While the later structural stability deceases with the increase of the early curing temperature, which leads to the decrease of its mechanical properties at the later stage.

Key words： magnesium oxysulfate early temperature and humidity mechanical properties water resistance

Published: 05 May 2018

CLC number:

TU528.37

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	Articles by authors
	BA Mingfang
	ZHU Jiezhao
	LIU Junzhe

Cite this article:

BA Mingfang,ZHU Jiezhao,LIU Junzhe. Effects and Mechanism of Early Temperature and Humidity on Properties of Modified Magnesium Oxysulfate Cementitious Materials[J]. Materials Reports, 2017, 31(20): 107-113.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.020.023 OR http://www.mater-rep.com/EN/Y2017/V31/I20/107

1 Urwongse L, Sorrell C A. Phase relationships in magnesium oxysulfatecements[J]. J Am Ceram Soc, 1980,63(9-10):523.
2 Li Y, Yu H F, Dong J G, et al. Research progress in deliquescence dehalogenation and efflorescence of magnesium oxychloride cement[J]. Bull Chin Ceram Soc, 2010,29(4):858(in Chinese).
李颖, 余红发, 董金关, 等. 氯氧镁胶凝材料吸潮返卤泛霜的研究进展[J]. 硅酸盐通报, 2010,29(4):858.
3 Li Z Y, Jin D X, Zhou C, et al. Laboratory study on magnesia cement for oil well sealing and temporary blocking[J]. J Southwest Petroleum University(Sci Technol Ed), 2011,33(5):152(in Chinese).
李早元, 靳东旭, 周超, 等. 镁氧水泥用于油井堵漏及暂闭的室内研究[J]. 西南石油大学学报(自然科学版), 2011,33(5):152.
4 Zhou X, Li Z. Light-weight wood-magnesium oxychloride cement composite building products made by extrusion[J]. Construct Build Mater, 2012(1):382.
5 Li Z G, Ji Z S, Li Y H. Research progress on deformation and cracking of magnesium oxychloride cement products[J]. Bull Chin Ceram Soc, 2012,31(2):1(in Chinese).
李振国, 吉泽升, 李一珩. 氯氧镁水泥制品变形及开裂的研究进展[J]. 硅酸盐通报, 2012,31(2):1.
6 Cole W F, Demediuk T Aust.X-ray, thermal, and dehydration stu-dies on magnesium oxychlorides [J]. Australian J Chem, 1955,8(2):234.
7 Demediuk T, Cole W F, Heuber H V. Studies on magnesium and calcium oxychlorides [J]. Australian J Chem, 1955,8(2):215.
8 Demediuk T, Cole W F. Study of magnesium oxysulphase [J]. Australian J Chem, 1957,10(2):287.
9 Kahle K. Mechanism formation of magnesium-sulfate cements[J]. Silikatechnik, 1972,2(5):148.
10Vincenzo M Sglavo, Riccardo Ceccato. Influence of curing temperature on the evolution of magnesium oxychloride cement [J]. J Mater Sci, 2011,46:6726.
11余红发. 氯氧镁水泥及其应用[M]. 北京:中国建筑工业出版社, 1993:363.
12Luo J G, Yao J S, Sun J E. Study on kinetics of hydration for MgO-MgSO₄-H₂O cementitious system[J]. Bull Chin Ceram Soc, 1998,26(2):157(in Chinese).
罗建国, 姚吉升, 孙建鄂. MgO-MgSO₄-H₂O胶凝体系水化动力学的研究[J]. 硅酸盐学报, 1998,26(2):157.
13Ding Y, Zhao H Z, Sun Y G, et al. Superstructured magnesium hydroxide sulfate hydrate fibers photoluminescence study[J]. Int J Inorg Mater, 2001,3(2):151.
14Yue T, Gao S Y, Zhu L X, et al. Crystal growth and crystal structure of magnesium oxysulfate 2MgSO₄·Mg(OH)₂·2H₂O[J]. J Molecular Struct, 2002,616(1-3):247.
15Ma P H, Wei Z Q, Xu G, et al. Dehydration and desulfuration of magnesium oxysulfate whisker[J]. J Mater Sci Lett, 2000,19:257.
16Liu Z P, Zhang W M, Yang Y H, et al. Hydrothermal synthesis of sector-like hydrous magnesium nickel oxysulfate whisker[J]. J Mater Sci Lett, 2002,21:65.
17Xiang L, Liu F, Li J, et al. Hydrothermal formation and characte-rization of magnesium oxysul-fate whiskers[J]. Mater Chem Phys, 2004,87:424.
18Deng D H. A study on the theories and techniques for improvimg properties of MgO-based basic salt cements and their articles[D]. Changsha:Central South University, 2005(in Chinese).
邓德华. 提高镁质碱式盐水泥性能的理论与应用研究[D]. 长沙: 中南大学, 2005.
19Wu C Y, Yu H F. Effects of phosphoric acid and phosphates on magnesium oxysulfate cements[J]. Mater Struct, 2015,48:907.