- BUILDING STRUCTURES, BUILDINGS AND FACILITIES
- Bearing Capacity of Restored and Strengthened Reinforced Concrete Floor Slabs
- UDC 624.012.4:69.059.3 DOI: 10.33622/0869-7019.2020.01.21-27
Grigor V. NALBANDYAN1, e-mail: firstname.lastname@example.org
Andrey V. KOPYTIN2, e-mail: email@example.com
Pavel V. OSIPOV3, e-mail: firstname.lastname@example.org
Valentin A. USHKOV1, e-mail: email@example.com
1 Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
2 Design-Technological Bureau of Concrete and Reinforced Concrete (JSC "KTB RC"), 2nd Institutskaya ul., 6, str. 15A, 109428 Moscow, Russian Federation
3 Limited liability company "Nanotechnology Center of Composites", Volgogradsky prospekt, 42, korp. 5, Moscow 109316, Russian Federation
Abstract. The influence of various repair compositions on the bearing capacity of restored and strengthened floor slabs modeling flat reinforced concrete floor slabs of communication collectors is considered. Industrial brands of repair compositions based on cement binder, repair compositions containing quartz sand and mixing water after treatment with low-temperature non-equilibrium plasma, and materials for external reinforcement of building structures were used. It is shown that industrial repair compositions based on cement and repair compositions based on modified raw materials restore the bearing capacity of model floor slabs in almost the same way. In this case, the destruction of floor slabs occurs on the repair composition. It was established that the external reinforcement of reinforced concrete slabs restored with repair compositions using carbon mesh or tape significantly increases their bearing capacity. The high efficiency of the use of epoxy polymer composite materials for the repair and strengthening of reinforced concrete structures of various functional purposes is confirmed by the results of verification calculations of the initial and model floor slabs, as well as conducted experimental studies.
Key words: external reinforcement, floor slabs, deflections, repair compositions, composite materials, crack opening width.
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- For citation: Nalbandyan G. V., Kopytin A. V., Osipov P. V., Ushkov V. A. Bearing Capacity of Restored and Strengthened Reinforced Concrete Floor Slabs. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2020, no. 1, pp. 21-27. (In Russian). DOI: 10.33622/0869-7019.2020.01.21-27.