不同胶粉及水泥用量的瓷砖胶耐久性影响因素研

关键字：胶粉用量；水泥用量；耐久性；影响因素；基材

（1.上海市建筑科学研究院，上海  201108；2.上海市建筑建材业市场管理总站，上海  200032）

    摘要：研究了在浸水、冻融及高温条件下不同胶粉及水泥用量的瓷砖胶性能变化规律并深入分析了其耐久性的影响因素和提升技术。结果表明：瓷砖胶的28 d拉伸粘结强度主要与水泥和胶粉掺量有关。胶粉掺量小于1%时对拉伸粘结强度提高有限；瓷砖胶的浸水拉伸粘结强度主要与水泥掺量有关，当水泥掺量低时耐水性下降，但水泥掺量也不宜过高，瓷砖胶表面致密反而不利于与瓷砖的机械锚合力。同时胶粉乳化成膜后遇水易溶胀，提高胶粉掺量对其耐水性有利；瓷砖胶耐冻融拉伸粘结强度既要求其耐水又要有一定耐冻融应力变形能力，胶粉掺量不宜过低；影响瓷砖胶耐热老化拉伸粘结强度的主要因素是胶粉掺量和基材含水率。

    关键词：胶粉用量；水泥用量；耐久性；影响因素；基材含水率

    中图分类号：TU58+1.3        文献标识码：A        文章编号：1001-702X（2018）05-0030-04

 

Study on durability of tile adhesive based on different re-dispersible emulsion powder and cement content

WANG Juan1，KOU Yude2，CHEN Ning1

（1.Shanghai Academy of Building Research，Shanghai 201108，China；

2.Shanghai Construction Building Materials Market Management Station，Shanghai 200032，China）

   Abstract：The variation of the properties of tile adhesives with different amounts of emulsion powder and cement in water immersion，freezing and thawing and high temperature conditions was studied，and the influencing factors and improvement techniques of its durability were analyzed in depth. The results show that the bonding strength of 28 d for tile adhesive is mainly related to the content of cement and the content of emulsion powder. When the content of emulsion powder is lower than 1%，the tensile bonding strength is not improved obviously，the water-resistant bonding strength is mainly related to the amount of cement，when the cement content is low，the water resistance decreased，but the dosage of cement should not be too high，that will form a compact surface which decrease the force of mechanical anchor. Meanwhile，the emulsion powder dispersed and had swelling behavior facing with water，so increasing powder content is good for its water resistance property. The freeze-thaw resistance bond strength of tile adhesive require both ability of water resistance and stress deformation，so the powder content should not be too low，the main factors affecting the bond strength of aging resistance of tile adhesive is the emulsion powder content and moisture content of the substrate. 

    Key words：the content of emulsion powder，the content of cement，durability，influencing factors，the moisture content of the substrate