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蒸压加气混凝土砌块(以下简称砌块)填充墙砌体出现裂缝、空鼓等问题,除施工质量较差和构造措施不合理等原因外,砌块与砌筑砂浆和抹面砂浆之间的粘结性能较差也是主要原因之一。试验研究了砂浆稠度、保水性、强度等级和砌块含水率等因素,对砌块与砂浆的粘结强度的影响。结果表明:砂浆稠度较低时,随着砌块含水率增大,砌块与砂浆的粘结强度也随之增大;砂浆稠度较大和保水性良好时,砌块含水率为15%～30%时,有利于提高砌块与砂浆的粘结强度;单纯提高砂浆强度等级对粘结强度的贡献相对较小;增强砂浆稠度和保水性,与砌块含水率之间的匹配性,更有利于有效提高粘结强度。
Autoclaved aerated concrete block (hereinafter referred to as block) filled wall masonry cracks, hollowing and other issues, in addition to poor construction quality and structural measures unreasonable and other reasons, the masonry and mortar between the mortar The poor bonding performance is also one of the main reasons. The effects of mortar consistency, water retention, strength grade and moisture content of block on the bond strength between block and mortar were studied. The results show that when the mortar consistency is low, as the moisture content of the block increases, the bond strength between the block and the mortar increases. When the mortar consistency is high and the water holding capacity is good, the water content of the block is 15% ~ 30 %, Is conducive to improving the bond strength between block and mortar; Simply improve the mortar strength grade contribution to the bond strength is relatively small; Reinforced mortar consistency and water retention, and block water content between the match, but also Help to effectively improve the bond strength.