Rubber aggregates' effect on the rheological and mechanical behavior of self-compacting concrete

• Published in: Materials today : proceedings
• Main Authors: El Marzak, Mounir, Karim Serroukh, Hamza, Benaicha, Mouhcine, Zhu, Jianguo, Hafidi Alaoui, Adil, Burtschell, Yves
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2023
• Subjects: Compressive strength; Hardened density; Rheological behavior; Rubber concrete; Self compacting concrete; Compressive strength; Rubber concrete; Rheological behavior; Hardened density; Self compacting concrete
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2023.03.146

This research work aims to study the effect of the incorporation of aggregates from the recycling of used tires on the rheological and mechanical behavior of self-compacting concrete (SCC). In this regard, rubber particles with diameters of 0–4 mm were used in the SCC mixture as a partial substitution at 10, 20, 25, and 30% of the volume of sand. The rheological behavior of SCCs based on rubber aggregates is characterized by empirical tests (namely, slump flow, L-box, and V-Funnel) and by measuring the plastic viscosity and yield stress using a concrete rheometer. Furthermore, mechanical behavior is characterized by measuring the compressive strength and the density in the hardened state. Based on the experimental and statistical data, adding more rubber to SCCs makes it more likely that the mixtures will get stuck, making them harder to work with and less resistant to being compressed. Based on this analysis, a suggestion has been made for the best amount of rubber to use so that the mixtures meet the requirements to be called SCC.