Effect of manufactured sand on self-compacting concrete performance

Author(s): Smain Benyamina, Said Kenai, Belkacem Menadi
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 1
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 441-446
Total Pages: 6
Language : English

Abstract: The construction industry consumes a large amount of natural resources, especially natural aggregates. However, the use of alluvial sands from rivers is restricted for environmental reasons. Manufactured sand from gravel quarries is very abundant and could be an alternative solution to overcome the deficiency in natural sand. Manufactured sand is characterised by its high limestone fines content, which could be very useful for the production of self-compacting concrete (SCC). The aim of this paper is to report on the influence of limestone fines on the rheological and mechanical properties of SCC. Different SCC mixtures were produced with 0%, 5%, 10%, 15% and 20% of limestone fines as sand replacement. The fresh properties of the SCC mixtures were evaluated by means of slump flow, flow time (V-funnel) and L-box tests. The hardened properties such as compressive and flexural strength were also measured. According to the experimental results, the slump flow decreases with the increase of limestone fines content. In terms of mechanical properties, an improvement of strength was noticed at early ages. However, strength of SCC decreases at long term with limestone fines content. This experimental investigation showed that 15% of limestone fines could be an optimal level of substitution for SCC production for the materials used and properties investigated.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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