The Increasing еhe Efficiency of Fiber Reinforced High-Strength Self-Compacting and Carcass Concretes

The results of experimental and theoretical studies of fiber reinforced concretes are presented. The purpose of the research was to establish physical and mechanical properties of self-compacting, carcass concrete and fiber reinforced concrete. When performing the research, white cement was used as a binder. As a reactive additive was used white carbon black BS-100. Plasticizing of the system was carried out by polycarboxylate SP. To increase the volume of dispersed phase, the combined filler from rheologically active fine ground rocks was used, namely: quartz flour R-6, and microcalcite RM-5. To form the filled structure of the composite we also used fine sand PB-150, and at the first stage steel microfiber “BMZ” and glass fiber «Antikrek sp» were used as dispersed reinforcement. Dispersed reinforcement with glass fiber 0,15 mm diameter and 18 mm long, with volume reinforcement of 0,8% increased the composite compressive strength by 13,4%, flexural tensile strength by 12,8%. Dispersed reinforcement with metal fiber of 0,15 mm diameter and 15 mm length, at volume reinforcement of 4,2% contributed to increase the compressive strength by 46,5%, flexural tensile strength by 186,6%. Further increase in the strength of fiber concretes is possible by strengthening the anchorage of fibers in the matrix. Therefore, at the second stage, the influence of different types of metal fibres, differing in shape and type of anchor, on the properties of dispersed-reinforced concrete was established. An increase in flexural and compressive strength from the introduction of dispersed reinforcement of “Spring”, “Wave” and “Dramix” types is shown. The assumption of efficiency from application of fiber of “dumbbell-like” form in modern reaction-powder composites, and also manufacturing of materials with application of frame technology, consisting at first in formation of a frame from glued grains of large aggregate and then in impregnation of its empty matrix component, is put forward. Comparison of calculated and actual strength of fiber concretes is carried out

V.T. EROFEEV¹, Academician of RAASN, Doctor of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.);
O.V. TARAKANOV², Doctor of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.V. ANANYEV³, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.V. LESNOV⁴, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.V. EROFEEVA¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
Ya.A. SANYAGINA⁵, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
N.S. SIDOROV³, Student (This email address is being protected from spambots. You need JavaScript enabled to view it.);
Y.S. ANANYEVA³, Student (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Penza State University of Architecture and Construction (28, Germana Titova Street, Penza, 440028, Russian Federation)
³ Vladimir State University named after A.G. and N.G. Stoletov (87, Gorkogo Street, Vladimir, 600000, Russian Federation)
⁴ National Research Mordovian State University named after N.P. Ogarev (68, Bolshevistskaya Street, Saransk, 430005, Russian Federation)
⁵ Scientific-Research Institute of Building Physics of RAACS (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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