Abstract
The use of recycled aggregates in the production of reinforced concrete elements is becoming a reality. The durability of such elements, namely those of reinforced natural aggregate concrete, is an object of concern. In this study, the service life of reinforced recycled aggregate concrete is estimated through prediction models available in the literature. The end of the service life is ruled by concrete corrosion-induced cracking. Therefore, models for the initiation period and the propagation period are considered. The study encompasses two situations: ordinary concrete and high-performance concrete. Comparisons with equivalent mixes using only natural aggregates are made. Besides confirming the higher durability of high-performance concrete and the effects of increasing cover depth and reinforcing bar diameter on service life (positive the former and negative the latter), it is found that service life tends to decrease with the increase of the replacement ratio. Losses range from 9% to 32% for reinforced concrete subjected to carbonation-induced corrosion and between 5% and 19% for reinforced concrete subjected to chloride-induced corrosion. These data constitute a valuable input for meaningful Life Cycle Analysis.
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