Impact of Water-Cement Ratio and Desert Sand Powder on the Mechanical Properties of Eco-Self-Compacting Concrete

Said Zaouai; Farid Benmerioul; Abdelkadir Makkani; Ahmed Tafraoui; Rachid Rabehi

doi:10.18540/jcecvl10iss8pp20748

Auteurs

Said Zaouai Laboratory of Eco-materials: Innovations & Applications (EMIA), Civil Engineering Department, University of Djelfa, 17000 Djelfa, Algeria
Farid Benmerioul Laboratory of Eco-materials: Innovations & Applications (EMIA), Civil Engineering Department, Mohamed El Bachir El Ibrahimi University Elbourdj B, Algeria
Abdelkadir Makkani Laboratory of Eco-materials: Innovations & Applications (EMIA), Civil Engineering Department, TAHRI Mohamed University, Bechar, Algeria
Ahmed Tafraoui Laboratory of Eco-materials: Innovations & Applications (EMIA), Civil Engineering Department, TAHRI Mohamed University, Bechar, Algeria
Rachid Rabehi Faculty of Civil Engineering, University of Science and Technology Houari Boumediene (USTHB), BP 32 El Alia, Bab Ezzouar, 16111 Algiers, Algeria

DOI :

https://doi.org/10.18540/jcecvl10iss8pp20748

Mots-clés :

Eco-self-compacting concrete, Water-cement ratio, Dune sand powder, Compressive strength, Sustainable construction materials

Résumé

This study investigates the effects of varying water-cement (w/c) ratios (0.40-0.55) and the incorporation of 10% powdered dune sand from Taghit, Algeria, on eco-self-compacting concrete (E-SCC) properties. The research explores the potential of utilizing abundant desert sand resources as a partial cement replacement while maintaining concrete performance. Through experimental analysis and response surface methodology (RSM), the study demonstrates that lower w/c ratios significantly enhance compressive strength, with optimal performance achieved at a 0.40 w/c ratio reaching 55 MPa. The findings reveal that decreasing the w/c ratio reduces porosity and improves the concrete's overall structural integrity. Capillary absorption tests indicate that while E-SCC with a 0.40 w/c ratio shows slightly higher initial absorption rates over the first two hours, it demonstrates better long-term performance over 24 hours compared to higher w/c ratios. The results confirm that incorporating 10% powdered dune sand while maintaining a low w/c ratio can produce high-performance eco-self-compacting concrete that meets industry standards for workability and strength, offering a sustainable alternative for construction applications.

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