Issue 59

T. Djedid et alii, Frattura ed Integrità Strutturale, 59 (2022) 580-591; DOI: 10.3221/IGF-ESIS.59.38

Effect of varying silica-limestone sand fines on the physical-mechanical performance of concrete

Tarek Djedid Laboratory of Exploitation and Valorisation of Saharan Energy Resources " LEVRES " Department of Hydraulic and Civil Engineering, Faculty of Technology, University of El-Oued, 39000, Algeria. tarek-djedid@univ-eloued.dz Mohammed Mani, Abdelkader Ouakouak Department of Hydraulic and Civil Engineering, Faculty of Technology, University of El-Oued, 39000, Algeria. m.mani39@gmail.com, ouakouakk@yahoo.fr Abdelhamid Guettala Research Laboratory in Civil Engineering « LRGC », University Mohamed Khider Biskra, BP 145 RP, 07000 Biskra, Algeria. guettalas@yahoo.fr

A BSTRACT . The use of crushed limestone sand in the concrete industry will be quite possible and imperative for environmental reasons. Many researchers around the world have found that concrete based on 50% substitution of river sand by limestone sand gives better physico-mechanical characteristics. The main objective of this investigation is to search for an optimal percentage of silica-limestone fines resulting from the substitution of half in quantity of alluvial sand by crushed limestone sand in ordinary concrete. The proportions of fines that were tested in this work are 6%, 8%, 10%, 12% and 14%. The obtained results revealed that concrete based on silica-limestone sand and containing 14% of the same type of fines strongly improves the different mechanical strengths and participates in the reduction of 10% and 13%, of the coefficient of capillary absorption and of the porosity accessible to water, respectively, compared to the control concrete. In addition, good statistical relationships between the studied parameters were also found. K EYWORDS . Silica-limestone sand; Silica-limestone sand fines; Concrete; Physical-mechanical characteristics.

Citation: Djedid, T., Mani, M., Ouakouak, A., Guettala, A., Effect of varying silica-limestone sand fines on the physical-mechanical performance of concrete, Frattura ed Integrità Strutturale, 59 (2022) 580-591.

Received: 10.10.2021 Accepted: 19.12.2021 Published: 01.01.2022

Copyright: © 2022 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

I NTRODUCTION

orld consumption of natural sand is very excessive, due to the extensive use of concrete or mortar. In general, the demand for natural sand is quite high in Algeria and developing countries to satisfy the rapid growth of infrastructure [1, 2]. Thus, the production of concrete requires the consumption of a quantity of natural W

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