Estudo comparativo de ensaios destrutivos e não destrutivos para concreto

Abstract

Concrete is the most used material in construction and better suited to resist compressive loads. Since it an indispensable material and that in its aging is subject suffering from various types of conditions and with high repair costs, there is a need for equipment and methods of studies to help in the diagnosis, as well as evaluating problems and the causes of diseases. The authors seek to examine trials in which it becomes possible to check the quality and durability of concrete, showing the difference between the results of destructive tests with the non-destructive tests for the same specimen (In this case a block 1x 0,5x 0,5 m). Importantly, the strength of concrete depends on the raw materials. The properties of fresh concrete and the way that it will be carried out (released) in construction, as well as the care you will be given after its hardening. Water to cement ratio, the aggregates and the method of compaction and curing are examples of factors that determine resistance. Non-destructive testing (concrete test hammer and ultrasonic testing) and concrete test specimens has the advantage of the fact of not needing to take samples of the structure to obtain results, ie no structural damage occurs. On the other hand the destructive tests, obtained by extracting samples, have greater reliability in the real resistance of structure. Both destructive and non-destructive were performed according to the rules. As for comparison the results were evaluated at the ages of 7, 14, 21, 28 and 63 days and the concrete test hammer were obtained in all ages, lower resistance that others tests. The resistance of the molded specimens were higher than the samples taken, also in all ages.