Efeitos do tipo, tamanho e teor de agregado graúdo no módulo de deformação do concreto de alta resistência

Abstract

Concrete, material with heterogeneous and complex composition, is the main structural material applied in the construction industry. From the structural point of view its main property is the mechanical strength. The behavior of concrete based on conceptual studies of granular resistance can lead to a safer structural design and better use of the material. This paper presents the results of a study conducted to evaluate the effects of type, size and content of coarse aggregates on the modulus of deformation of high strength concretes. The concrete mixture studied contains basalt or granite aggregates with maximum dimensions of 9.5 mm and 19.0 mm and water/cement ratio of 0.35. The deformation modulus of the material was determined using the linear length of Load-CMOD curve (displacement of the crack mouth opening) from three point bending tests performed using a middle span cracked beam, following the propositions made by the RILEM 89-FMT technical committee.