单组分瓷砖背胶及粘结剂体系与玻化砖粘结强度试验研究

Experimental study on bond strength between single component ceramic tile back glue and adhesive system and vitrified bricks

试验通过设计不同初粘性背胶、瓷砖胶粘剂厚度以及浸水时间,研究了瓷砖背胶与瓷砖胶粘剂的匹配机制和破坏机理。结果表明,使用初粘性较低或玻璃化温度较高的背胶,可有效提高胶粘剂与瓷砖的粘结强度;瓷砖胶粘剂厚度过大会导致内聚粘结强度降低,影响背胶对瓷砖胶粘结体系的增益效果,最佳施工厚度应该控制在8 mm左右;背胶膜吸水后内聚力降低,会导致粘结失效,玻璃化温度较高的背胶具有较好的耐水性,但浸水时间达到21 d时相差不大。理想施工环境下应尽量追求更高的界面破坏占比,减小瓷砖胶粘剂内聚破坏占比。

In this paper,thickness and immersion time of back glue and ceramic tile adhesives with different initial adhesive were designed to experimentally study the matching mechanism and failure mechanism between ceramic tile back glue and ceramic tile adhesives.The results show that using ceramic tile backing adhesive with lower initial viscosity or higher glass transition temperature can effectively improve the bonding strength between the adhesive and ceramic tiles;Excessive thickness of ceramic tile adhesive can lead to a decrease in cohesive bonding strength,affecting the gain of the backing adhesives on the ceramic tile bonding system.The optimal construction thickness should be controlled at around 8 mm;After absorbing water,the cohesive force of the backing adhesive film decreases,which can lead to bonding failure.The adhesive with a higher glass transition temperature has good water resistance,but the difference is not significant when the immersion time reaches 21 days.In the ideal construction environment,efforts should be made to pursue a higher proportion of interface failure and reduce the proportion of cohesion failure in ceramic tile adhesives.