Effect of different treatments of granular rubber on mechanical performance of self-compacting rubberized concrete - using locally sourced materials

Waste tires recycling and upcycling technologies are crucial for further realization of circular economy strategies. Therefore, improvement of already existed and searching for new methods of waste tires in sustainable concrete applications are fully justified. This research is focused on improving the mechanical response of rubberized self-compacting concrete, with the objective of enhancing its weak Interfacial Transition Zone (ITZ). The study examines the effects of various treatment methods for Rubber Aggregate (RA), such as NaOH, limestone filler, and crushed dune sand, on the mechanical properties of SCCR.In this paper the crushed dune sand and limestone filler were using as mineral addition in the formulation of self-compacting concrete (SCCR), for that a comparison was carried out on their effect on the properties and behavior of SCCR in a fresh and hardened state. The pre-treatment consequently allowed for improved compressive strength; results indicate an increase of 18.64% and 24.25% in the 28-day compressive strength, respectively, for the selected rubberized concrete mixture.