Abstract
The superficial texture of coarse aggregate modifies the interface zone and the adherence between aggregate and mortar. Recycled aggregates obtained from crushed waste concretes present a higher superficial ruggedness and porosity than natural aggregates, due to the mortar attached to the rock, which can affect the recycled aggregates properties and recycled concretes performance. This paper presents the results obtained on concretes elaborated with 50, 75 and 100% by replacement of natural coarse aggregate by recycled coarse aggregate obtained from crushed concrete elaborated with siliceous gravel. The results are compared with those obtained on conventional concrete (with natural coarse aggregate). It is observed that recycled concretes present strength levels similar to the conventional concrete, and their durable behaviors are satisfactory.
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