Brick masonry reinforcement with methyl methacrylate injection
https://doi.org/10.37538/2224-9494-2024-3(42)-111-123
EDN: DCMAEH
Abstract
Introduction. Structural reinforcement of brick and stone masonry by grouting materials under pressure is an efficient approach to restoring the masonry integrity, and, in some cases, improving its bearing capacity. This paper presents the results of research studies into the strength of a masonry structure reinforced by methyl methacrylate injection. This research is part of a larger project, which was launched in 2004 and continues to date. Due to the high penetrating ability of methyl methacrylate, reinforcement of masonry structures with small crack opening seems highly promising.
Aim. Evaluation of the effectiveness of methyl methacrylate injection for masonry reinforcement.
Materials and methods. The experimental studies were carried out in two stages. At the first stage, masonry specimens manufactured in the form of columns were subjected to compression tests. At the second stage, methyl methacrylate was injected under pressure into the specimens with formed cracks. The as-reinforced specimens were tested again in order to evaluate their strength increase factor.
Results. The distribution of methyl methacrylate throughout masonry when injected under pressure, as well as through individual brick and mortar specimens without pressure, was studied. It is shown that the technology of masonry reinforcement by methyl methacrylate differs significantly from that of concrete consolidaton, where higher pressures contribute to its more even distribution over the concrete body.
Conclusions. Injection of methyl methacrylate into masonry with multiple load cracks can increase its loadbearing capacity by at least 1.2 times.
The results of research were used in the development of normative documents on reinforcement of masonry structures.
About the Authors
E. M. Ishchuk
Research Institute of Building Constructions named after V.A. Koucherenko, JSC Research Center of Construction
Russian Federation
Russian Federation
Evgeniy M. Ischuk, Group Leader of the Laboratory for the Reconstruction of Unique Stone Buildings and Structures
2nd Institutskaya str., 6, bld. 1, Moscow, 109428, Russian Federation
e-mail: ruskon@inbox.ru
tel.: +7 (926) 329-29-69
M. K. Ishchuk
Research Institute of Building Constructions named after V.A. Koucherenko, JSC Research Center of Construction
Russian Federation
Russian Federation
Mikhail K. Ishchuk, Dr. Sci. (Engineering), Head of the Laboratory for the Reconstruction of Unique Stone Buildings and Structures
2nd Institutskaya str., 6, bld. 1, Moscow, 109428, Russian Federation
e-mail: kamkon@yandex.ru
tel.: +7 (926) 535-20-32; +7 (499) 174-79-96 (83)
References
1. Recommendations for improving the quality of masonry and joints of large-panel buildings by injection under pressure. Moscow: Stroyizdat Publ.; 1987. (In Russian).
2. Recommendations for strengthening stone structures of buildings and structures. Moscow: Stroyizdat Publ.; 1984. (In Russian).
3. <i>Voronina V.P.</i> Strength and deformability of brickwork and joints of large-panel buildings injected with cement mortars [dissertation]. Moscow; 1986. (In Russian).
4. SNiP II-22-81*. Stone and reinforced stone structures. Moscow: Gosstroy of Russia; 2004. (In Russian).
5. Technology of injection reinforcement of masonry of architectural monuments. Methodological
6. recommendations. Moscow: Spetsproektrestavratsiya; 1991. (In Russian).
7. <i>Khanov N.M.</i> Strength and deformability of brickwork under local compression, taking into account its injection with modified polymer compositions [dissertation]. Moscow; 1993. (In Russian).
8. <i>Dubrovskaya L.V.</i> Strength and deformability of brickwork of architectural monuments of Kazakhstan and the development of methods for its reinforcement [dissertation]. Moscow; 2004. (In Russian).
9. <i>Ishchuk M.K., Frolova I.G., Ishjuk E.M.</i> Reinforcing the brick structures. Promyshlennoe i grazhdanskoe stroitel'stvo = Industrial and Civil Engineering. 2006;(8):28–30. (In Russian).
10. <i>Ishchuk M.K., Ishchuk E.M., Frolova I.G.</i> Strengthening of masonry with injection of epoxy resin. Promyshlennoe i grazhdanskoe stroitel'stvo = Industrial and Civil Engineering. 2013;(4):48–51. (In Russian).
11. STO 36554501-010-2008. Structurwl restoration of brik masoury by injection with epoxy «GLOBALPOX 1-10/138/ВТ». Moscow: FSUE Research Center of Construction; 2008. (In Russian).
12. <i>Pantschenko A., Ischuk M., Ischuk E.</i> Modifizierten Feinstzemente für die Mauerwerksanierung. In: Ibausil, Weimar, 12–15 september 2012. 18. Internationale Baustofftagung. Vol. 2. Weimar: Bauhaus – Universitat Weimar; 2012, p. 172.
13. <i>Shilin A.A.</i> Repair of building structures by injection. Moscow: Gornaya kniga: Publishing House of Moscow State University; 2009. (In Russian).
14. <i>Ishchuk M.K.</i> A study of the strength and deformations of brick walls and vaults reinforced with the use of domestic technologies and materials compatible with historical masonry. Research and Development Report No. АААА-Б19-219052790078-0. Moscow; 2019. (In Russian).
15. SP 427.1325800.2018. Masonry and reinforced masonry structures. Methods of strengthening. Moscow: Standartinform Publ.; 2019. (In Russian).
16. Methodological guidelines for strengthening masonry, including historical buildings, by injection of mortar [internet]. Moscow; 2019. Available at: https://files.stroyinf.ru/Data2/1/4293720/4293720336.pdf. (In Russian).
17. <i>Zabelina O.B., Kunin Yu.S.</i> The choice of a method for strengthening brick vertical structures after a detailed technical inspection of the object of the federal state budgetary institution of culture Polytechnic Museum. Science and Business. 2018;(11):102–107. (In Russian).
18. <i>Granovskiy A.V., Kunin Yu.S., Legetskiy O.E.</i> Evaluation of the strength of brickwork reinforced with an injection compound. Promyshlennoe i grazhdanskoe stroitel'stvo = Industrial and Civil Engineering. 2023;(2):37–43. (In Russian). https://doi.org/10.33622/0869-7019.2023.02.37-43
19. <i>Granovskiy A.V., Kunin Yu.S., Legetskiy O.E.</i> Injection formulations to increase the strength and solidity of brickwork. Promyshlennoe i grazhdanskoe stroitel'stvo = Industrial and Civil Engineering. 2023;(4):16–20. (In Russian). https://doi.org/10.33622/0869-7019.2023.04.16-20
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For citations:
Ishchuk E.M., Ishchuk M.K. Brick masonry reinforcement with methyl methacrylate injection. Bulletin of Science and Research Center of Construction. 2024;42(3):111-123. (In Russ.) https://doi.org/10.37538/2224-9494-2024-3(42)-111-123. EDN: DCMAEH
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