基于热工理论的保温砌块用砌筑砂浆的热桥分析

Analysis on thermal bridge of building mortar in insulation building block in view of thermal theory

加气混凝土保温砌块被广泛用作框架结构填充墙,目前大多采用混合砂浆作为砌筑砂浆。然而相对于主体结构的加气混凝土而言,混合砂浆导热系数相对较大,因此,灰缝部分就成为加气混凝土保温砌块传热的热桥,这将严重降低填充墙节能效果。基于热工理论,分别选取混合砂浆和保温砂浆,对加气混凝土砌块的热桥影响进行热工性能分析,保温砌块采用保温砂浆砌筑,将取得明显的建筑节能效果,该结论与GB 50411—2007《建筑节能工程施工质量验收规范》具有一致性。

Aero-concrete insulation building block was extensively used as padding wall of framed building. At present,mixed mortar is mostly adopted as building mortar. But in view of major structure,mixed mortar has relative heat conduction coefficient. Thus, part of lime crack will become thermal bridge problem in heat transmission of aero-eoncrete insulation building block. Energy efficiency of padding wall will be seriously reduced. In view of thermal theory, mixed and insulation mortar are partly selected, and effect on thermal bridge of aero-concrete insulation building block is analyzed in thermal property. Insulation mortar is used in insulation building block, obvious effect on building energy efficiency will be come into being. This conclusion is of the same view just right with national standard GB 50411--2007 ＂Code for Acceptance of Energy Efficient Building Construction＂.