Possibilities of Reinforcement of Two-Layer External Brick Masonry with Composite Mesh

Possibilities to reinforce the two-layer brick masonry with composite meshes are considered. According to the normative document, when heating degree-days is over 2000°C-day/deg., external brick walls are used as two-layered or three-layered. The use of external three-layer walls with effective insulation with a face layer of masonry of 120 mm thickness is limited for buildings with a service life over 50 years, but the recommended service life of buildings and structures of mass construction under the normal conditions of operation is not less than 50 years. A variant of the construction of two-layer walls under these conditions is the external facing layer of brick masonry and the inner layer of cellular concrete when the external and inner layers of masonry must be connected by flexible connections of steel reinforcement, composite mesh. When the rows of the inner and outer layers of masonry in the location of the ties don’t match more than 5 mm, it is allowed to use the flexible connections mounted in the thickness of the stones of the main masonry layer. The use of composite mesh restrains the mismatch of the rows of the inner and outer layers of masonry. The thickness of the composite mesh is 3.6–4 mm, which makes it possible to use it when making the masonry of blocks of cellular concrete on glue, the coefficient of thermal conductivity of which is 25% less than the coefficient of thermal conductivity of the masonry of blocks on cement-sand mortar. The thermal conductivity coefficient of composite mesh is more than 100 times lower than that of steel mesh.

N.V. BEGUNOVA¹, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
V.N. VOZMISCHEV², Engineer, Deputy General Director (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Kalashnikov Izhevsk State Technical University (7, Studencheskaya Street, Izhevsk, 426069, Russian Federation)
² “KomAR” LLC (427966, Sarapul, Gogolya Street, 40)

1. SP 15.13330.2012. Stone and armokamenny designs. The revised edition Construction Norms and Regulations of II-22–81* (with changes No. 1, 2, 3). Moscow: Standartinform. 2019. 81 p. (In Russian).
2. SP 327.1325800.2017. Walls external with a front brick layer. Rules of design, operation and repair. Moscow: Standartinform. 2017. 33 p. (In Russian).
3. SP 70.13330.2012. The bearing and enclosing structures. The revised edition Construction Norms and Regulations 3.03.01–87 (with changes No. 1, 3). Moscow: Standartinform. 2013. 205 p. (In Russian).
4. Sokolov B.S., Antakov A.B. Results of researches stone and reinforced of layings. Vestnik MGSU. 2014. No. 3, pp. 99–106. (In Russian).
5. Antakov A.B. Durability of the stone layings reinforced with composite grids. Uspehi sovremennogo estestvoznaniya. 2014. No. 7, pp. 116–120. (In Russian).
6. Antakov A.B., Plotnikov A.N., Pozdeev V.M. Bearing capacity of the stone laying reinforced by grids from basalt plastic fittings. In the collection: modern problems of calculating reinforced concrete structures, buildings and structures for emergency impacts, edited by A.G. Tamrazyana, D.G. Kopanitsy. 2016, pp. 15–21. (In Russian).
7. Sokolov. B.S., Antakov A.B. Results of pilot studies of layings with mesh reinforcing from composite materials. Vestnik grazdanskih inzenerov. 2017. No. 5 (64), pp. 62–65. (In Russian).
8. Buchkin A.B., Granovskii A.B., Ishuk M.K., Urin E.N., Koroleva E.N., Maksimova T.A., Nikishov E.I. Researches of grids composite polymeric for a stone laying and definition of rational scopes. Research report No. 76/2018 dated 02.03.2018 (FAA “Federal Center for Standardization, Standardization and Technical Conformity Assessment in Construction”) (In Russian).
9. Stepanova V.F., Falikman V.R., Buchkin A.V. Tasks and the prospects of application of composites in construction. In the collection of materials of the third scientific and technical conference “Actual problems of the theory and practice of the use of composite reinforcement in construction”. Izhevsk. 24 november 2016, pp. 55–73. (In Russian).
10. Nanni A., de Luca A., Jawaherizadeh H. Reinforced concrete with fiber reinforced plastic reinforcement rods. Mechanics and design. Taylor & Francis group. New York, 2014. 479 p.
11. Mechtcherine V., Schröfl C., Snoeck D., De Belie N., Klemm A.J., Almeida F.C.R., Ichimiya K., Moon J., Wyrzykowski M., Lura P., Toropovs N., Assmann A., Igarashi S.-I., De la Varga I., Erk K., Ribeiro A.B., Custódio J., Reinhardt H.W., Falikman V. Testing superabsorbent polymer (sap) sorption properties prior to implementation in concrete: results of a rilem round-robin test. Materials and structures. 2018. Vol. 51. No. 1, pp. 28. https://doi.org/10.1617/s11527-0018-1149-4
12. Sokolov B.S., Antakov A.B. A new approach to calculating of stone layings. Izvestiya Kazanskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta. 2014. No. 3 (29), pp. 75–81. (In Russian).
13. Yoo D.-Y., Yoon Y.-S. A review on structural behavior, design, and application of ultra-high-performance fiber reinforced concrete. International journal of concrete structures and materials. 2016. No. 10 (2), pp. 125–142. https://doi.org/10.1007/s40069-016-0143-x
14. Staroverov V.D., Baroyev R.V., Tsurupa A.A., Krishtalevich A.K. Composite fittings: application problems. Vestnik grazhdanskikh inzhenerov. 2015. No. 3 (50), pp. 171–178. (In Russian).
15. Sokolov B.S., Antakov A.B. Theoretical bases of strengthening of stone layings. Zhilishhnoe Stroitel’stvo [Housing Construction]. 2017. No. 10, pp. 50–55. (In Russian).