Revision of the State Standard 32803 "Self-stressing concrete. General specifications" in the light of the possibility of further development of the field of application of effective concrete

Abstract

Introduction. State Standard 32803 was developed more than 8 years ago and took into account the level of development of production and the approach to the problem in this period. At the same time, over the past period, the scope of application of straining concretes has expanded, new technologies for the production of such concretes have been developed both at precast concrete plants and on the construction sites. The use of modern technologies for the production of straining concretes and the development of new types of such concretes, in particular self-compacting and heat-resistant, significantly expands the scope of use of straining concretes in structures that are subject to requirements for surface quality and durability, strength, water resistance, frost resistance, absence of defects.At the same time, such concretes can be effectively used for underground construction and in special structures, such as capacitive and hydraulic structures, with obtaining high grades of water permeability resistance, frost resistance and abrasion resistance in the concretes used for their construction.Aim. The revision of State Standard 32803 was carried out in order to clarify and adjust the types of straining concrete and expanding additives for the production of such concretes.Materials and methods. The new edition of the standard takes into account the possibility of using both waste products and new materials.Results. An updated version of the standard is presented, compiled taking into account new and updated editions of previously developed regulatory documents.Conclusions. The use of expanding additives in the composition of prestressing concrete, including additives, makes it possible to solve the urgent problem of protecting the environment, since large-tonnage waste from various industrial productions is used for the manufacture of such additives.