Análise da correlação entre o índice esclerométrico, a velocidade ultrassônica e a resistência à compressão do concreto auto-adensável de 25 MPa

Abstract

Construction is one of the oldest activities of humanity, and has developed fast over the last centuries. At the same time, Engineering also evolved in many subjects, such as computer programming, control and development of new materials, structure design, management and planning of constructions, to name a few. Among these, emphasis can be given to the development of materials and computer programs, which can now prescribe the best material to be used for a specific function, either structural, insulation, aesthetics, etc. In the present work, the studied material is the concrete, which must meet several performance parameters to be used in a construction site, according to its role in it. If concrete’s function is structural, the characteristic compressive strength is the main parameter. When the structure has already been built, it is difficult to determine the strength achieved by the concrete, since an extraction of samples is necessary for them to be tested, which turns into a costly and slow solution. Fortunately, there are, in the market, equipment that can quickly and practically determine the strength of concrete structures without causing any damage to the structure from which the samples were taken, known as non-destructive methods. However, non-destructive tests are less accurate than the conventional sample compression tests, possibly producing unrealistic values. In this study, two non-destructive methods will be analised: sclerometry and ultrasound, aiming a more accurate value for concrete’s compressive strength.