FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAMS USING HYBRID FIBER AND RECYCLED INDUSTRIAL WASTE

Document Type : Original Article

Authors

1 Structural Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt

2 Structural Engineering Department, Faculty of Engineering (Shoubra), Benha University, Egypt.

3 Civil Engineering Department, Faculty of Engineering, in Benha - Benha University, Egypt.

Abstract

The effect of using mixture of rubberized concrete and containing polypropylene (PP) and Polyvinyl alcohol fiber (PVA) to improve the flexural behavior of reinforced concrete beams is the main aim of this work. This study consists of Perform the laboratory experiments to study the extent of improving the Flexural behavior of concrete beams as a result of adding a mixture of rubber concrete, polypropylene (PP) and polyvinyl alcohol fiber (PVA) in different proportions and investigating the mechanical properties of the produced beams. The bonding efficiency between crumb rubber and concrete was analyzed through testing the compressive strength and flexural behavior of beams with 20% crumb rubber (CR) contents and different types of hybrid fiber additives to the mixtures used to enhance the beams’ properties. The results indicated that the compressive strength of the crumb rubber (CR) content of 20% with zero fiber was 20.5 MPa.The optimum compressive strength of beams are obtained with crumb rubber content of 20% and (0.5% PP+0.5%PVA).it was found that the beams had ultimate strength, ranging from 87.4 to 84.64 KN . The ultimate strength of rubberized beams with hybrid fiber (PP+PVA) was investigated and it was found that the produced beams have an acceptable resistance in comparison with the recycled rubber concrete without fiber reinforced of the beams

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Journal of Al-Azhar University Engineering Sector
Volume 20, Issue 75
April 2025
Pages 538-546

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