Document Type : Research Paper

Authors

• Iman M. Qadir ¹
• Ahmed Tareq Noaman ²

¹ Civil Engineering Department, University of Anbar, Ramadi, Iraq

² Civil Engineering Department, College of Engineering, University Of Anbar

Abstract

The problem of discarded tires has received a lot of attention from many authors. Incorporation of rubber aggregate recycled from waste tires is one of the solutions to this issue. This research is based on evaluating fresh and hardened properties such as slump flow, T500, segregation resistance, and L-box tests, compressive strength, impact resistance, and flexural toughness. Rubber aggregate replacements in the self-compact concrete mixes was 10% by volume of fine aggregate. Additionally, both PET and steel fibers are utilized at a volume rate of 0.25%.The outcomes indicate that introducing rubber declines rheological and hardened properties, whereas incorporating hybrid fibers enhances hardened properties such as compressive strength, impact energy, and flexural toughness. The best increase impact energy was obtained at roughly 166.6% when 0.25% hybrid fibers and 10% rubber were used. 74.21 was the greatest increase in flexural toughness when 0.25% hybrid fibers (SCCH3) were used. As for the compressive strength, it was the highest by about 11%.

Keywords

• Self-Compacting Concrete,,
• ,،Rubberized concrete,,
• ,،PET fiber,,
• ,،Hybrid,,
• ,،Impact resistance

Main Subjects

• Materials and Construction Engineering