Efficiency of Production and Application of Rebar Rolled Products with New Types of Periodic Profile

New types of rebar rolled products with a multi-row arrangement of transverse ribs on the surface were produced at EVRAZ ZSMK JSC, and introduced into the practice of design and construction at the A.A. Gvozdev NIIZHB JSC “SIC “Construction”. Replacement of the production of reinforcement with a “European” crescent-shaped profile having a two-row arrangement of transverse ribs according to GOST R 52544–2006 “Rolled reinforcement welded periodic profile of classes A500C And B500C for reinforcement of reinforced concrete structures. Technical conditions” for fittings with a multi-row arrangement according to TU 14-1-5526–2006 “A500SP class rebar rental with an effective periodic profile. Technical conditions” made it possible to increase the durability of rolling roll calibers by 15–25%, and consequently, to increase the productivity of rolling mills, reduce energy and fuel costs, and reduce greenhouse gas emissions; to get the possibility of rolling with exposure to minus tolerances (OM2 according to GOST 34028–2016 “Reinforcement rental for reinforced concrete structures. Technical conditions”) due to the absence of longitudinal ribs (Au500SP and Av500SP); ensure high rejection values of the Rem criterion (f_R≥0.075); ensure rolling of the reinforcement with the possibility of its multipurpose use when forming a two-way screw thread (Av500P); to provide competitive advantages of reinforcement of JSC “EVRAZ ZSMK” at the construction market; to get an economic effect of several hundred million rubles from the introduction and production of 4 million tons of new fittings at the plant. As a result of studies carried out in 2003–2021 of consumer properties of rebar with a multi-row periodic profile of classes A500SP, Au500SP and A600SP in the A.A. Gvozdev NIIZHB, JSC “SIC “Construction” developed and implemented for the design of housing and communal services STO 36554501-005–2006 “The use of A500SP class rebar in reinforced concrete structures” and STO 36554501-065–2020 “Application of reinforcement of classes A500SP, Au500SP and A600SP in reinforced concrete structures”, using the positions of which in the calculation of reinforced concrete structures makes it possible to reduce the base length of anchoring reinforcement in concrete by 12%; reduce the crack opening width in reinforced concrete by 20–30%; reduce the consumption of reinforcement in the production of reinforced concrete structures on average by 2–3% due to stable production of rolled products with negative tolerances; to get an economic effect for the consumer in the amount of more than 3 thousand rubles / ton. With an annual production of rod fittings in Russia of about 4 million tons, the economic effect will be more than 12 billion rubles.

I.N. TIKHONOV¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.V. KOPYLOV², Chief Calibrator (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ JSC “SIC “Construction” (6, 2nd Institutskaya Street, Moscow,109428, Russian Federation)
² JSC “EVRAZ ZSMK” (16, Kosmicheskoe Shosse, Novokuznetsk, 654043, Russian Federation)

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