Experimental Investigation of Using PET Wastes as Tension Bars in Reinforced Concrete Beams

Abass Oda Dawood,Hamsa Mahir Adnan

doi:10.29196/jubes.v27i1.1993

Abass Oda Dawood, Hamsa Mahir Adnan

Open Access

https://doi.org/10.29196/jubes.v27i1.1993

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Abstract

This research is aimed to study the possibility of recycled the PET wastes by forming the PET wastes as plastic semi-bars and used it as tension bars in simply supported reinforced concrete beams . Twelve beams specimens with dimension of (150*200*1400) mm are casted and tested to monitoring the effecting of these wastes as tension bars on the strengths and serviceability of reinforced concrete beams. The mechanical properties (compressive, splitting tensile and flexural strength) are evaluated in which specimens tested in age of 28 days. The tests results showed that all presented plastic semi-bars are failed except one case in which the deformed steel bar are used with additional layer of PET bottle cut into two parts which showed an increment in ultimate failure load and deflection of 3.03 % and 213.83 % respectively, larger than the reference beam specimens. Negatively effect of PET semi-bar on ultimate load of beams is due to bonding failure between PET bars and surrounding concrete, which made the PET bars as voids or weak region within beam cross section.

Highlights

The problem of plastic waste is a global problem, and is not confined to a particular country without another, but for all the countries of the world, with different degrees of seriousness
The Polyethylene terephthalate (PET) bottles used with three forms in three tests one of them is the use of it in the circular form with 5 mm width used in percentages of (0.5,0.75, 1.0) % by weight of concrete and the second form is concrete beams reinforced with long PET strips in a position similar to the reinforcement bars in the concrete beams and the third form is substitution of steel reinforcement as strips cutting from bottles with dimensions (45*0.2*300)mm
In the present study it’s tried to use PET as tension reinforcement in different shapes and configurations, but all presented plastic bars are failed except one case in which the deformed steel bar are used with additional layer of PET bottle cut into two parts, namely beam (B8P6) which yield an ultimate load of 85 kN, i.e 3.03 % larger than reference beam

Summary

Introduction

The problem of plastic waste is a global problem, and is not confined to a particular country without another, but for all the countries of the world, with different degrees of seriousness. The PET bottles used with three forms in three tests one of them is the use of it in the circular form (circular fibers) with 5 mm width used in percentages of (0.5,0.75, 1.0) % by weight of concrete and the second form is concrete beams reinforced with long PET strips (half bottle) in a position similar to the reinforcement bars in the concrete beams and the third form is substitution of steel reinforcement as strips cutting from bottles with dimensions (45*0.2*300)mm Their results showed that 1.0% is the best percentage of circular fibers. The results showed that the fiber reinforced concrete with both short and continuous fibers had better flexural strength, ductile behavior and energy absorption capacity than the specimens without fibers . in the present study new configurations and forms of reusing PET bottles as reinforcement for concrete beams in different forms are investigated

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