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为了正确、合理地在砼中应用粉煤灰,使之掺入砼后达到改善砼性能、提高工程质量、节省水泥、降低砼成本、节约资源等要求,以适应基本建设发展的需要,国家组织编制和批准发布了G BJ146—90 《粉煤灰砼应用技术规范》(以下简称《规范》),并自1991年10月1日起施行。 《规范》计总则、粉煤灰的技术要求、粉煤灰砼的工程应用、粉煤灰砼配合比设计与粉煤灰取代水泥的最大限量、粉煤灰砼的施工和粉煤灰砼的检验共六章,适用于各类工程建设中,包括在施工现场、集中搅拌站、预制厂掺用粉煤灰的无筋砼、钢筋砼和预应力钢筋砼。 砼小型空心砌块,属预制厂或砌块生产厂生产的砼制品或砼构配件,如砼小型空心
In order to properly and reasonably apply fly ash in concrete, so that it can be incorporated into concrete, it can be used to improve the performance of concrete, improve the quality of the work, save cement, reduce the cost of crucibles, save resources, and meet the requirements of basic construction development. The preparation and approval of the release of G BJ 146-90 Technical Specification for Fly Ash Application (hereinafter referred to as the “Code”) was implemented on October 1, 1991. General Rules, specifications of fly ash, engineering application of fly ash, design of fly ash ash mix, maximum limit of cement replaced by fly ash, construction of fly ash and fly ash The inspection consists of six chapters and is applicable to all types of engineering construction, including reinforced concrete, reinforced concrete and prestressed reinforced concrete with fly ash at the construction site, centralized mixing plant, and prefabrication plant.砼Small hollow blocks, which are boring products or accessories made by prefabricated or block manufacturing plants, such as small hollow