Análise de piso industrial em matriz de concreto produzido com adição de fibras de aço do modelo hooked e crimped

Abstract

Concrete is a brittle material, however, steel fibers can be added to improve its mechanical properties, such as traction and modulus of elasticity. In the case of industrial floors that are subject to frequent loads, both in terms of compression and traction, the addition of fibers can improve the mechanical properties of the concrete. The objective of this work is to analyze the effects of adding Hooked and Crimped steel fibers on the properties of concrete matrix intended for industrial floors. This research consisted of the addition of two fibers with different geometries, Hooked steel fibers and Crimped steel fibers with a percentage content of 1%, 1.5% and 2.0% and taking as a reference a standard resistance trait of 32MPa. The total of 7 mixes during the research, the first being the reference concrete without steel fiber and the others with percentages specified above. This work characterized the physical and mechanical properties of concrete with and without the addition of fibers, through laboratory tests in accordance with ABNT standards and determined the concrete matrix model with the addition of different types of fibers to obtain the best model for the efforts. requested on the industrial floor. For concrete with and without the addition of fibers, all materials for dosing the concrete mix were characterized and the specimens were prepared to be tested for resistance to axial compression, modulus of elasticity, tensile strength in diametral compression, three-point flexion and the slump test. Numerical modeling was also carried out using the finite element method (MEF) for all tests in this research, and an industrial rigid pavement was modeled in accordance with ABNT and DNIT standards, using the model with CDP (Damaged Plasticity Model) parameters, the results show agreement with the experimental results analyzed from the concrete matrix with the addition of steel fibers. The incorporation of steel fibers in the concrete matrix significantly improved the concrete matrix without adding fibers, obtaining a superior result than Hooked steel fiber with 2%.