The Features of Using Self-Compacting Fine-Grained Fresh Concrete during Winter Concreting of Joints

To reduce the time of housing construction, advanced technologies of industrial housing construction are considered. Given the design features of the joints of reinforced concrete structures of modernized large-panel buildings, preference is given to in-situ joints. To ensure a high speed of installation of precast concrete products, including in winter conditions of work, the use of Ultra High Performance Concretes (UHPC) with specified characteristics is required. The article discusses the issues of improving the technology of winter concreting of joints through the use of fresh of self-compacting fine-grained concrete (SCFGC) based on dry constructional mixes (DCM) with the required intensity of curing and stiffness of concrete for pouring. The main types of in-situ joints of prefabricated reinforced concrete structures of large-panel buildings are considered. As a result of the generalization of experimental studies and extensive industrial experience in the use of SCFGC in the construction of prefabricated buildings, recommendations are given on the designation of structural and technological parameters of the quality of fresh of SCFGC, hardened concretes based on them, the features of the technology for the preparation of fresh of SUMBS, concreting and quality control. The successful application of SCFGC based on DCM allows to ensure the quality of large-panel housing construction, taking into account the all-weather nature of the production of in-situ work on sealing the joints of prefabricated structures, allows you to increase the pace of construction and reduce its time by 2–3 times compared to in-situ buildings.

E.V. RUMYANTSEV¹, Chief Designer of Product Department (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.Kh. BAYBURIN², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ LLC “PIK-Constructional Technologies” (19/1, Barricadnaya Street, Moscow, 123242, Russian Federation)
² 2 National Research South Ural State University (76, Lenina Avenue, Chelyabinsk, 454080, Russian Federation)

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