- BUILDING STRUCTURES, BUILDINGS AND FACILITIES
- Evaluation Of The Strength Of Brickwork Reinforced With An Injection Compound
- UDC 692.2:693.2
doi: 10.33622/0869-7019.2023.02.37-43
Arkady V. GRANOVSKIY1, granovskiyav@mgsu.ru
Yuri S. KUNIN1, uskunin@mgsu.ru
Oleg E. LEGETSKIY2, legetskiy@mail.ru
1 Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
2 AKVAKOMPONENT, Proletarsky prospekt, 17, korp. 1, of. B4YU, Moscow 115522, Russian Federation
Abstract. The results of experimental studies on the assessment of the compressive strength of masonry, taking into account the introduction of injection compositions Mcflowe, Microdur R-X/E and cement mortar based on Portland cement of the M500 brand in combination with elements of indirect reinforcement with steel studs, are presented. The technique of strengthening masonry with cracks using injection solutions is given. Prototypes of brick pillars were made of bricks taken from the reconstructed object - the Polytechnic Museum in Moscow. Nine samples of pillars were tested for central and off-center compression until vertical and inclined cracks appeared in them, corresponding to the third stage of brickwork work. After that, cracks were injected using a special technique in three series of samples using the named injection compositions (three samples in each series), followed by compression testing of the samples. In addition, a comparison was made of the bearing capacity of non-reinforced and reinforced with injection composition samples of the masonry of pillars, which made it possible to establish the degree of effectiveness of the injection when strengthening damaged masonry. It is noted that at the same time, the strength of the masonry, depending on the type of solution, increases from 25-30% (Mcflowe mortar mixture) to 80% (R-X/E Microdur mortar mixture).
Keywords: brickwork, masonry reinforcement, injection method, temporary compression resistance, injection solutions - REFERENCES
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