Rubberized Self-Compacting Concrete: Mechanical Performances and Durability

Rubberized self-compacting concrete (RSCC) is a new building material with ecosustainable characteristic due to the post-consumer tyres content in its concrete mix-design. Physical-mechanical properties and durability of RSCC must anyway be evaluated as they strongly depend on the concrete formulations. Fresh and hardened behavior as well as steel reinforced bar corrosion has been studied for RSCC, where fine aggregates have been partially replaced (up to 30 vol%) by post-consumer tyres. The reported results highlight a decrease in workability, compressive strength and elastic modulus with rubber content, whereas flexural strength seems less sensitive to rubber content. Corrosion activity, studied on steel reinforced RSCC over a period of about 8 months with drying and wetting cycle in water and NaCl 3% solution, is low and comparable to that of ordinary self-compacting concrete (SCC).