低品级菱镁矿制耐水氯氧镁胶凝材料的研制  

The Preparation of Water-resistant Magnesium Oxychloride Cement Made with Low-grade Magnesite

作　　者：陈后维 章祥林[1] 靳廷甲 徐建[1] 

机构地区：[1]安徽建筑大学材料与化学工程学院,安徽合肥230601

出　　处：《安徽建筑大学学报》2015年第1期48-51,共4页Journal of Anhui Jianzhu University

摘　　要：用粉煤灰、磷酸、硫酸铝、有机硅防水剂以及活性氧化镁含量为34.91%的低品级轻烧氧化镁研制出一种耐水氯氧镁胶凝材料,并对镁质材料的强度、耐水性能进行了测试。通过分析粉晶XRD衍射图样和断面微观结构对镁质材料的耐水机理进行了研究。研究结果表明改性过的镁质材料具有优良的耐水性能,其28d软化系数从0.76提高到了1.01。该方法充分利用了低品级菱镁矿资源,为镁质胶凝材料的制备提供了新思路。A kind of water‐resistant magnesium oxychloride cement （MOC） were made by fly ash , phosphoric acid ,aluminum sulfate ,organosilicon water‐proofing agent and low‐grade light burned magnesium oxide contains 34 .91% active magnesium oxide .The materials＇strength and water resist‐ance were tested .Crystal powder XRD analysis and fracture surface SEM analysis were applied to study the materials＇water‐tolerant mechanism .The results showed that the improved magnesia mate‐rials had fine water resistance ,soft coefficient raised from 0 .76 to 1 .01 .This method could take full advantage of low‐grade magnesite and provides a new method to prepare magnesia cementing materi‐als .

关 键 词：菱镁矿 镁质胶凝材料 耐水性能 

分 类 号：TU526[建筑科学—建筑技术科学]