Caracterização ultrassônica de blocos históricos cearenses

Abstract

Heritage constructions have been a relevant topic for technical community due to high variability and complexity of the structural systems, as well the high cultural value. Considering the natural degradation of the materials and the variation of loadings actions over the time, the maintenance and rehabilitation measures are needed in order to keep the structure under safety. Current, new technologies have emerged aiming the characterization of ancient masonries. The physic and mechanic characterization through ultrasonic pulse velocity (UPV) is a alternative do interventions on heritage constructions. Thus, this work presents as the main aim to characterize the UPV of historic clay bricks from Beberibe, Fortaleza, Icó, Irauçuba, Sobral and Viçosa do Ceará. These cities are integrated with 4 distinct ages of Ceara and the results were employed to state a correlation between UPV and compressive strength of the clay bricks blocks. The samples were characterized according with physic and mechanic properties, as UPV were measured in each one sample. The experimental allowed the obtainment of compressive strength, weight, geometrical information and UPV. For the experimental 3 samples of XVIII century from Icó were employed, while where used 3 samples from first half of the XIX century from Sobral, 5 samples from Fortaleza and 3 samples from Irauçuba both from the second half of XX century. 3 samples from Beberibe and 5 samples from Viçosa do Ceará from XX century were used too. The results showed a good correlation between UPV and compressive strength of the analyzed samples. Only the Sobral samples from first half of the XIX century presented correlation in the limit of acceptance. All others result presented a linear correlation higher than 0,80. So, the UPV can be an interesting and relevant tool for investigate the properties of heritage constructions.