Análise da resistência à compressão de traços populares de concreto com variação do tamanho do agregado graúdo e consistência

Abstract

Concrete is currently one of the most used materials in the world, mainly due to the numerous possibilities related to its use. Based on this, its incorporation should count on rigorous verification processes, which is often not fulfilled, especially with regard to small and medium-sized works. Thus, the significance of the observation of the alteration of this process concerns the productive sphere, since the unruly use of aggregates causes unnecessary expenses, and also to the applicability of the concrete produced, which may have its use prevented from not achieving the consistency. Thus, this work aims to analyze the resistances of the common traces of concrete, as well as the impacts of the variation of the large aggregate and its consistency. This objective was achieved from the reproduction of pre-established common traits, denominated according to their proportion and Slump, with modification in the gravels used, 0 and 1, and in their consistency, establishing two Slump's, of 50±10 mm and 100±20 mm. Once this was done, to achieve this, tests were carried out in the fresh and hardened states according to the normative standard, and these based the conclusions generated. Based on these, it was observed that in all the traces where only the exchange of gravel 1 by gravel 0 required to increase the amount of water to reach the desired consistency, increasing the water/cement factor, keeping all the traces within the defined margins. this, it was noticed that the variation of the aggregate and the amount of water directly impacted the compressive strength, reaching 77.56% higher when compared T1:3:4b1y5 with T1:3:4b0y10. Therefore, it was concluded that the modifications tested play an important role in the final characteristics of concrete, thus having greater attention in the daily life of works in general, especially those that use only popular knowledge.