Comparative Evaluation of Strength, Rigidity and Crack Resistance of Concrete Structures Reinforced with Fiberglass Rebar and Steel Rebar

Abstract

In this paper, we present the results of studies of concrete beams for strength, rigidity and crack resistance reinforced with fiberglass rebar manufactured by KomAR. The purpose of the study was to determine the strength, rigidity and crack resistance of beams with a fiberglass rebar and their comparison with reinforced concrete beams, which were adopted by reference beams. The main document, stating the requirements for testing, is GOST 8829-94 «Products reinforced concrete and concrete factory production. Methods of loading tests. Rules for evaluation of strength, rigidity and crack resistance». Beams with composite rebar are made by analogy with beams with steel rebar with preservation of geometry, diameter and number of rebar bars. The test program included the study of technical documentation for products, the study of regulatory documents for a possible field of application, visual inspection of the appearance of samples, testing of strength, rigidity and crack resistance. External inspection and examination of the beams were carried out to check the quality of the surfaces (the presence of defects and damage). Checking the size of the beams and the establishment of surface defects (shells, chips) is performed with the help of measuring instruments: calipers, roulette and measuring magnifier.