Abstract
AbstractIn modern conditions of increasing the volume of monolithic reinforced concrete construction, the problem of improving the strength, deformation characteristics of concrete, as well as its crack resistance, fire resistance, impact and fatigue strength is urgent. This can be achieved by adding various reinforcing fibers to the mixture: steel, glass, basalt, cellulose, polymer and even plant origin. Literature analysis was performed to structure the different types of placeholders. The article presents the results of studies of various aggregates, compares the characteristics of fiber-reinforced concrete with classical concrete at different volume fractions of fibers in the mixture. According to the analysis results, the leading additives to concrete are polypropylene fibers (an increase in tensile strength by 2.3 times (129.6%) than non-fibrous concrete, and a decrease in creep and shrinkage deformations up to 44.6%), mineral dust and polymer fibers (increase in strength by 33.3% and decrease in moisture permeability by 40% in comparison with conventional concrete), steel and aluminum fibers (increase in tensile strength up to 36%). The result of the study is a brief and systematized information on the main fibers used in the composition of fiber-reinforced concrete, their percentage in the mixture, as well as the advantages and disadvantages.KeywordsFiber-reinforced concreteFRCReinforcementMonolithic constructionReinforcing fibers
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