Estimativa de espessura do concreto utilizando o método do eco - impacto

Abstract

In this research we used an experimental device that uses the method of impact-echo on Physical Testing Laboratory of the Polytechnic Institute of Rio de Janeiro (UERJ/IPRJ), to estimate the thickness of concrete slabs through the propagation of stress waves generated by an impact. To determine this thickness, several mechanisms for structuring the prototype equipment in order to obtain the best possible reading by means of existing literatures were investigated. Among the parameters evaluated in the study was the model of sensor being used, the type of impact, the precision related to the data acquisition and processing thereof, the distance between the impact point and the transducer (sensor), and test site. The experimental results agree with the theoretical predictions and show that this method is effective for analyzing concrete structure. The thickness analysis and frequency response of a new prototype and testing allowed an average error of actual thickness for samples without aggregates and 0.39 % for samples with aggregates with 0.64 %. These results indicate that the product produced has potential and that it can be used for evaluation of concrete structure.