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采用8字形新老砂浆抗拉粘结强度的试验方法,研究了丁苯聚合物乳液水泥基界面粘结材料在不同养护制度、不同粘结方法、不同龄期、不同配比条件下的粘结性能,同时研究其本体强度变化规律,对其粘结改性机理进行初步探讨,并利用扫描电镜对界面粘结微观结构进行了分析。结果表明,其粘结性能良好,抗折强度可以提高,抗压强度不显著下降。
Tensile bond strength between the old and the new 8-shaped mortar was studied. The bond of cement-based interfacial adhesive of the styrene-butadiene polymer emulsion under different curing systems, different bonding methods, different ages and different proportions was studied Performance, and study the variation law of its bulk strength. The bonding modification mechanism was discussed. The interfacial adhesion microstructure was also analyzed by SEM. The results show that the bonding performance is good, the flexural strength can be increased, the compressive strength does not decrease significantly.