ABSTRACT
Due to the scarcity of aggregates in some regions of the Amazon, the present work has the objective of evaluating the properties of concretes produced with aggregate from the bed of the Oiapoque river. A comparative study was carried out comparing the characteristics of the large aggregates used in construction, especially the material found in the Oiapoque river bed in the city of Oiapoque, and the large aggregate from the metropolitan area of Belém. mechanical properties, performance tests and microstructure of concretes. The results showed that the use of the aggregate of arenite origin of the Oiapoque region showed no difference in the compressive strength and modulus of elasticity of the concretes in relation to the concrete produced with aggregate commercially available in the metropolitan area of Belém. the concrete as to the rate of absorption of chlorides over time and neither advance in the front of carbonation. The scanning electron microstructure of the concretes presented a dense microstructure, but usually found in cementitious matrix - based composites. These findings serve as empirical evidence for the validation of the use of an aggregate deposit in the Amazon Region, contributing to the development of infrastructure works in the region.
Keywords
Aggregate scarcity; Amazon region; mechanical properties; durability properties
