氯氧镁水泥减水剂的试验研究与应用

关键字：减水剂,氯氧镁水泥,减水率,力学性能,软化系数

（济南市杰美菱镁建材研究所，山东 济南  250031）

    摘要：研究不同种类减水剂对氯氧镁水泥净浆流动性的影响，结果表明，适合普通硅酸盐水泥的减水剂，对氯氧镁水泥的净浆流动性和减水率没有明显的效果。根据氯氧镁水泥的特性，研究了适合于氯氧镁水泥的复合专用减水剂，JM-1菱镁专用复合减水剂对氯氧镁水泥的减水率高，同时对氯氧镁水泥制品的力学性能、耐水性能均有不同程度的提高，特别是对降低制品中游离氯离子含量，提高制品抗返卤性具有明显效果。
    关键词：减水剂；氯氧镁水泥；减水率；力学性能；软化系数；游离Cl-含量；吸潮返卤
    中图分类号：TU528.042.2         文献标识码：A          文章编号：1001-702X（2017）06-0109-04

Experimental research and application of water reducing agent of magnesium oxychloride cement
ZHU Xiaojia，ZHU Yujie，ZHU Xiaobing，LIU Nianjie，ZHANG Xiujuan，LIU Rongmei，ZHU Xiaotao，ZHU Yanfeng
（Building Material Research Institute of Jie Mei Magnesite，Jinan 250031，China）

    Abstract：The effects of different types of water reducing agent on the paste fluidity of magnesium oxychloride cement were studied. The results show that the water reducing agent，which is suitable for ordinary portland cement， has no significant impact on the paste fluidity and water reducing rate of magnesium oxychloride cement. According to the characteristics of magnesium oxychloride cement，we studied the magnesium oxychloride cement composite special superplasticizer. The experimental results indicate that the JM-1 special magnesite composite superplasticizer greatly improved magnesium oxychloride cement paste fluidity and water reducing rate，at the same time increasing the mechanical properties and water resistance in different degrees，especially in reducing the content of free chlorine ion in products and obviously improving the anti-back-to-halogen property of products.
    Key words：water reducing agent，magnesium oxychloride cement，water reducing ratio，mechanical properties，softening coefficient，free Cl- content，moisture regain and bittern accumulation