Behavior of Recycled Aggregate Fibrous Reinforced Beams Under Flexural and Shear Loading

  • Eyad K. Sayhood Civil Engineering Department, University of Technology, Baghdad, Iraq
  • Ali Sadiq Resheq Civil Engineering Department, University of Technology, Baghdad, Iraq
  • Farah L. Raoof Civil Engineering Department, University of Technology, Baghdad, Iraq

Abstract

The use of recycled concrete aggregates (RCA) to replace part or all of the natural coarse aggregates (NCA) in the production of concrete has been on the increase. Such use helps in the protection of the natural resources and in the reduction in the use of landfills. The experimental work consists of casting and testing ten rectangular simply supported reinforced concrete beams of dimensions (1500*150*240) mm with concentric point load at mid span as well as tests for control specimens to determine the mechanical properties of the concert. Five beams of these ten beams were designed to fail in flexure and other five beams were designed to fail in shear. Two beams were considering as a reference beams using normal aggregate (NCA) and two beams were considering as a reference beams using recycled aggregate (RCA. The other six beams were cast using recycled concrete aggregates (RCA) with steel fiber in three different volumetric ratio (vf).The present investigation contains three main variables: Coarse aggregate (normal and recycled). Transverse reinforcement (with stirrups spacing 50 mm for flexure failure mode and without stirrups for shear failure mode). Steel fiber (vf) = (0.5) %, (1) % and (1.5) %. In addition, constant longitudinal reinforcement ratio 0.012. Experimental results have generally showed that ultimate loads (Pu) of beams made with RA are approximately close to the results of beams made with NA but with decrease of values (14% and 21%) for flexural and shear behavior respectively. 
Published
2019-06-25
How to Cite
K. Sayhood, E., Sadiq Resheq, A., & L. Raoof, F. (2019). Behavior of Recycled Aggregate Fibrous Reinforced Beams Under Flexural and Shear Loading. Engineering and Technology Journal, 37(3 C), 338-344. Retrieved from http://engtechjournal.org/index.php/et/article/view/396