Memoria tratta da "The New Boundaries of Structural Concrete: Session C – New Scenarios for Concrete", ACI IC - Bergamo 2013
This paper presents the results of the analysis of two methodologies proposed to reduce the differences in mechanical properties present in recycled concrete made with high percentages of recycled aggregates compared to a control concrete. Two methodologies were applied to structural concrete with 40% recycled aggregates and the results were compared with a control concrete. The first method consisted in increasing the amount of cement added from 2.5% to 10.0% in the manufacture of recycled concrete. The second method consisted in applying abrasion to the recycled aggregates to decrease the amount of adhered mortar. This method enabled the behavior of concrete manufactured with recycled aggregates with different degrees of abrasion to be evaluated. The results show that the long-term mechanical properties of concrete manufactured with both methodologies are similar to control concrete.
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