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新型抗水氯氧镁水泥的研究
作者:余红发 
单位:青海省建筑建材研究所 西宁 810008 
关键词:氯氧镁水泥  5·1·8相  结晶相  凝胶相  抗水性 
分类号:
出版年,卷(期):页码:1992,20(4):374-381
DOI:
摘要:
研究了新型抗水氯氧镁水泥的水化产物、显微结构和主要性能。XRD,DTA,SEM和EDAX分析表明,其主要水化产物5·1·8在不同条件下有4种形态,且Ca,P和S元素固溶量不同。未反应MgO微粒均匀分散在5·1·8凝胶内是其结构的主要特征,不稳定的针杆状5·1·8晶体只在孔洞内少量形成。从显微结构的观点分析了其抗水机理。
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The hydration products, microstructure and main properties of new type water-resisting magnesium oxychlodde cement are studied in this paper. XRD, DTA, SEM and EDAX studies show that the hydration product 5.1.8 has four morphologies at different conditions. The results show that there are different contents of Ca, P and S solid solution in the hydration products. The unreacted MgO grains homogcnously distributed in the5.1.8gel phase are main structural characteristics of new type water-resisting magnesium oxychloride cements.Only a small amount of unstable needle-bar-like crystals 5.1.8 formed in pores or holes were observed. The water-resisting mechanism of new type water-resisting magnesium oxychloride cements is also discussed frcm the standpoint of microstructure, which provides a satisfactory explanation for some of the phenomena observed in the experiments.
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基金项目:
国家“七五”重点科技攻关项目
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参考文献:
1 Sorel S. On a new magnesium cement. Comptes Rendus, 1867; 65:102 2 胶凝材料学编写组.胶凝材料学.第一版.北京:中国建筑工业出版社,1980:49~50 3 王佩玲,余金梁,冯玲英等.水化产物的结晶形态变化对镁水泥耐水性能的影响.镁水泥物化基础及特征论文选辑.宋彭生,沈威,王佩玲等编.西宁:“七五”37-04-01专题编委会,1990:84 4 夏树屏,王继顺,黄继芬等.添加剂对镁水泥耐水性、变形性和结构影响的研究.镁水泥物化基础及特征论文选辑.宋彭生,沈威,王佩玲 等编.西宁:“七五”37-04-01专题编委会,1990:148 5 Cole W F. Demediuk T. X-ray, thermal and dehydration studies on magnesium oxychlorides. Aust J Chem, 1955; 8(2) :234 6 Beaudoin J J, Ramaehandran V S. Strength development in magnesium oxychloride and others cements. Cem Coner Res, 1975; 5(6) :617 7 沈兴,马肇曾,刘志全等.镁水泥的凝固速度、强度发展、水溶性、相组成和显微结内的研究,镁水泥物化基础及特征沦文选辑.宋彭生,沈威,王佩玲 等编.西宁:“七五”37-04-01专题编委会.1990:100 8 余红发.镁水泥的反应历程与机理研究.镁水泥制品开发与应用研究论文集.余红发 编.西宁:青海省建筑建材科学研究所,1990:28 9 王佩玲,王心磊,佘金梁.镁水泥硬化浆体的显微结构和强度.镁水泥物化基础及特征沦文选辑.宋彭生,沈威,王佩玲 等编.西宁:“七五”37-04-01专题编委会,1990:93 10 Sorrell C A, Armstrong C R, Reactions and equilibria in magnesium oxychloride cements. J Am Ceram Soc, 1976; 59(1~2) : 51 11 余红发.5·1·8取代产物4Ca(OH)_2·Mg(OH)_2·MgCl_2·8H_2O的研究.镁水泥新反应产物的研究报告.西宁:青海省建筑建材科学研究所,1990
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