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项目设计阶段正处民用建筑外墙保温材料防火等级从严规定,建筑师选取了“EPS钢丝网架现浇混凝土外墙外保温系统”设计理念,加上酚醛板保温材料,组合成“大钢模内置酚醛板钢丝网架外墙外保温系统”。由于此保温系统没有相关的国家技术规范文件发布,所以本文对此系统隐存的不明风险进行了预测分析:即保温外抹灰砂浆层可能空鼓塌落。在参考了部分规范规程后提出以下具体措施:安排对实物进行拉拔测试;分仓施工,设置伸缩缝。在保温及抹灰层完成后的拉拔结果显示水泥砂浆抹灰层与保温层间的粘结强度达到参考指标(≥0.1MPa)要求,且经长时间观察,抹灰饰面层未出现大面积空鼓开裂,甚至塌落现象,所以“大模内置酚醛板钢丝网架外墙外保温系统”是一套可靠的保温系统。
The project design stage is in the civil building exterior insulation material fire rating strictly regulated, the architect selected “EPS steel mesh cast-in-situ concrete exterior insulation system ” design concept, coupled with phenolic board insulation materials, combined into “Steel built-in phenolic board steel wire mesh wall insulation system.” Because this thermal insulation system has no relevant national technical specification documents released, this article predicts and analyzes the hidden risks of this system that the plastering mortar layer may be hollowed out. After reference to some normative procedures proposed the following specific measures: arrangements for the physical pull test; sub-warehouse construction, the installation of expansion joints. The drawing results after the insulation and the plastering layer are completed show that the bond strength between the plastering layer and the thermal insulation layer of the cement mortar reaches the reference index (≥0.1MPa), and the plaster finishing layer does not appear large after prolonged observation The area of hollow drum cracking, and even slump phenomenon, so “model built phenolic board steel mesh wall insulation system ” is a reliable insulation system.