Composition and Properties of Self-Compacting Concrete Using a Complex of Modifiers

Modern construction is practically impossible to implement without the use of high-quality modified concrete, characterized by multicomponence and wide functionality. Among the variety of new types of concretes, self-compacting concretes are notably stand out, characterizing by high mobility of the mixture and resistance to delamination with a low water content in the system and, as a result, the ability to fill various matrix forms, including densely reinforced elements. To obtain a self-compacting concrete mixture with the required rheological parameters it is necessary to use a low water-cement ratio, a high proportion of dispersed and plasticising additives, etc. The paper proposes the use of an organo-mineral modifier of carbonate-silica composition and a hyperplasticiser. The powder modifier is characterized by sufficient activity (according to the sorption capacity and adsorption centers on the surface). The combined use of additives ensures the production of a high-density mobile mixture, resistant to delamination and characterized by sufficient retention of properties over time. Compositions of self-compacting concrete mixtures of heavy concrete with high mobility and resistance to delamination have been obtained, providing concrete with a compressive strength of 85–97 MPa corresponding to classes B60–B75 with a significant margin of strength, water resistance up to W14. The obtained nomograms can be used in the tasks of selecting the composition of durable and high-strength concrete of high quality.

NELUBOVA V.V., Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
USIKOV S.A., Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
STROKOVA V.V., Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
NETSVET D.D., Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Belgorod State Technological University named after V.G. Shukhov (46, Kostyukova Street, Belgorod, 308012, Russian Federation)

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