Abstract
This work studies the proportioning and the effects in fresh state rheology of the use of fine recycled aggregates (FRA) to produce self-compacting concrete (SCC). The recycled sand was incorporated in percentages of 0%, 20%, 50% and 100%. The mix proportioning was supported with tests on mortars, in which workability was measured from 10min to 90min. Once adjusted, full concrete was produced and fresh properties evaluated (empirical and rheometer tests). The most shocking result was that mixes with 50% and 100% recycled sand lost their SCC characteristics at 90min. Contrarily the mix with 20% replacement maintained suitable passing and filling ability.
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