EFFECT OF PASTE VOLUME ON WORKABILITY OF SELF-COMPACTING CONCRETE

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Abstract

In addition to influential parameters on rheology of Self-compacting concrete such as paste rheology and aggregate properties, paste volume factor can also be mentioned. The paste present in Self-compacting concrete can decrease interparticle friction of aggregates by increasing the distance between them, thus changing the fresh and hardened properties of Self-compacting concrete. Here by keeping the water cement ratio equal to 0.45, aggregates grading, admixture cement ratio percent, vma cement ratio percent fixed and only by changing the consumed paste volume, we assessed the effect of paste volume on workability of eight samples of Self-compacting concrete. Workability of different mixtures were assessed by undergoing slump-flow, j-ring, l-box (without bar), l-box, u-box, v-funnel and v-funnel (after 5 min) tests. Results in the mentioned range show improvement on workability of Self-compacting concrete due to increase of paste volume

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