Mechanical joints in rolled screw-threaded reinforcing bars
https://doi.org/10.37538/2224-9494-2022-4(35)-117-132
Abstract
Introduction. Russian manufacturers currently produce screw-threaded reinforcing bars (rebars) and couplers to join them. However, the application of such reinforcement in the construction industry is hindered by a high compliance in screw couplings.
Aim: to assess the compliance of coupling joints reinforced with adhesives.
Materials and methods. The study used Av500P screw-threaded rebars, couplers, as well as adhesive compounds containing a cement binder and epoxy resin. The compounds were injected into the coupling cavity by means of hand pumps, followed by their natural hardening. The tests were conducted using universal testing machines.
Results. In terms of strength, yield, and delaminatability, the compounds were found to meet the required stress-strain properties of couplers. Recommendations for assembling joints are provided.
Conclusions. The conducted studies show that Av500P screw-threaded rebars can be joined by means of couplers in construction.
About the Authors
I. N. Tikhonov
Research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Igor N. Tikhonov, Dr. Sci. (Engineering), Head of Center No. 21
2nd Institutskaya str., 6, bld. 5, Moscow, 109428
A. I. Zvezdov
JSC Research Center of Construction
Russian Federation
Russian Federation
Andrey I. Zvezdov, Dr. Sci. (Engineering), Professor, Deputy General Director for Academic Affairs
2nd Institutskaya str., 6, bld. 1, Moscow, 109428
V. P. Blazhko
Research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Vladimir P. Blazhko, Cand. Sci. (Engineering), Deputy Head, Center No. 21
2nd Institutskaya str., 6, bld. 5, Moscow, 109428
G. E. Grishin
Research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Grigoriy E. Grishin, engineer, Center No. 21
2nd Institutskaya str., 6, bld. 5, Moscow, 109428
G. I. Tikhonov
Research Institute of Concrete and Reinforced Concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Georgiy I. Tikhonov, engineer, Center No. 21
2nd Institutskaya str., 6, bld. 5, Moscow, 109428
References
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Review
For citations:
Tikhonov I.N., Zvezdov A.I., Blazhko V.P., Grishin G.E., Tikhonov G.I. Mechanical joints in rolled screw-threaded reinforcing bars. Bulletin of Science and Research Center of Construction. 2022;35(4):117-132. (In Russ.) https://doi.org/10.37538/2224-9494-2022-4(35)-117-132
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