Abstract
The building has a high demand for products and construction technologies to ensure optimum performance and durability, requiring knowledge of the behavior of materials and the influence they exert on the properties of cement composites. This work aims to experimental verification of the particle size influence of the fine aggregate in mixed mortar coating, both fresh and hardened. The particle packing was evaluated by loose bulk density of the particle sizes specified in NBR 248: 2003 and each sieve individually. Then, mechanical properties were determined by means of mechanical analysis (compressive strength, tensile strength in bending and potential adhesion to the tensile and dynamic modulus of elasticity) and durability indicators (loose bulk density, consistency, density and mass entrained air content either fresh, surface porosity, for water absorption and capillary microstructure and images) for mortars made with natural aggregate through size distribution curves - NBR 248: 2003, Carneiro and Cincotto (1999) and Reed (1995). The tests were evaluated the ages of 7, 21 and 28 days. It was evident that the particle size distribution of aggregates significantly influences the properties analyzed and should be considered during the process of dosage and specification. Keywords: mechanical property, durability, coating mortar, aggregates.
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