Avaliação das propriedades mecânicas dos concretos fabricados com agregados graúdos disponíveis em Santarém e região Oeste do Pará

Abstract

The study evaluated the mechanical properties of concretes produced with three types of coarse aggregates available in Santarém-PA (crushed stone, gravel, and "quebradinho"), using water/cement ratios of 0.74, 0.54, and 0.41. Properties were analyzed in both fresh (slump, cohesion, water demand) and hardened states (compressive strength, tensile strength, modulus of elasticity). Results showed lower water demand with gravel and higher strength with crushed stone. "Quebradinho" offered economic advantages for 20 and 30 MPa concretes. The choice of aggregate directly influences concrete quality and cost.