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根据国家建委建材总局1975年下半年下达的试制研究“预应力轻骨料混凝土轻型楼板”的任务,由北京市建材研究所、北京市建筑工程研究所、市建筑设计院、建筑工程学校、五建四工区等单位组成了“三结合”轻型楼板试验研究小组,对几种轻型大楼板进行了试验研究,为发展轻型框架建筑体系,降低建筑自重,减少原材料消耗及湿作业,提高施工效率,加强抗震性能,并为促进施工机械化、装配化提供更
According to the trial construction of the “prestressed lightweight aggregate concrete lightweight floor slabs” commissioned by the State Construction and Construction Commission General Building Materials Bureau in the second half of 1975, the Beijing Institute of Building Materials, the Beijing Institute of Architectural Engineering, the City Architectural Design Institute, the School of Architectural Engineering, and the The construction of the “Three-combination” lightweight floor test and research group formed a four-work area and other units. Several light-weight building panels were tested and researched to develop a lightweight frame building system, reduce the weight of the building, reduce raw material consumption and wet operations, and improve construction efficiency. Strengthen seismic performance and provide more for the promotion of construction mechanization and assembly