一、概述在我国基本建设战线上,混凝土构件已基本上实现了预制化、标准化、工厂化生产。生产率较现场浇注有很大提高。但混凝土构件工厂预制的劳动生产率仍比较低,能耗和生产成本较高,特别是生产周期长,这是一个普遍的、关键的问题,它直接决定了预制的场地要大、模板要多、蒸汽耗量大,生产成本也就难以降低。为了解决生产周期长的问题,广大科技工作人员作了大量的工作,搞出了许多新方法,新工艺。现在大、中型预制厂普遍采用了地坑法、养生窑法,初步决定了空心板和小型构件的快速养护,大大的缩短了周期。但是,对于大型构件,如排架、地基梁、牛腿柱、大梁等 I. Overview In China’s basic construction front, concrete components have basically achieved prefabrication, standardization, and factory production. Productivity is greatly improved over on-site pouring. However, the prefabricated labor productivity of concrete components factories is still relatively low, energy consumption and production costs are high, especially the long production cycle, which is a common and critical issue, it directly determines the prefabricated site to be large, more templates, With large steam consumption, it is difficult to reduce production costs. In order to solve the problem of a long production cycle, a large number of scientific and technical personnel have done a lot of work and have come up with many new methods and new techniques. Currently, large and medium-sized prefabrication plants generally adopt the pit method and the health kiln method, and initially determine the rapid maintenance of hollow slabs and small components, greatly shortening the cycle. However, for large components such as trusses, foundation beams, columns, girders, etc.