EXPERIMENTAL AND THEORETICAL STUDIES OF REINFORCED CONCRETE BENDING ELEMENTS MADE OF HIGH-STRENGTH CONCRETE

Abstract

The use of quality materials is necessary for the manufacture of load-bearing reinforced concrete structures that are subject to heavy loads. To meet such requirements, it is necessary to use high-strength concrete, which has high compressive strength, water and gas tightness, corrosion resistance due to its dense structure. The use of high-strength concrete makes it possible to reduce the cross-sectional dimensions of structures, thereby reducing the weight of structures compared to structures of traditional classes of concrete.The results of experimental and theoretical researches of work of reinforced concrete beams from high-strength and ordinary concrete at crossbending are resulted in work.A program of experimental research has been developed, which includes the manufacture and testing of concrete samples of prisms and cubes todetermine the strength and deformation characteristics of concrete of different composition, the manufacture and testing of experimental reinforcedconcrete beams for transverse loading. Three series of rays were tested, four in each. The composition of the concrete mixture for high-strength concreteusing metakaolin and hyperplasticizer is proposed.The proposed algorithm for calculating the bearing capacity of bending elements, based on the method of deformation, allows obtaining resultswith sufficient accuracy. The calculation is performed according to the developed algorithm, which is implemented in the Mathcad program.The analysis of experimental and theoretical values of bearing capacity of reinforced concrete beams from high-strength and usual concrete attransverse bend.