MECHANICAL Properties of WASTE PET FIBER- REINFORCED CEMENT BOUND aggregate MIXTURES

Omar Duliami; Ahmed Hilal Farhan

doi:10.30572/2018/KJE/160326

Authors

Omar Duliami MSc student, Department of Civil Engineering, College of Engineering, University of Anbar, Anbar, Iraq https://orcid.org/0009-0008-1382-9914
Ahmed Hilal Farhan Assistant Professor, Department of Civil Engineering, College of Engineering, University of Anbar, Anbar, Iraq

DOI:

https://doi.org/10.30572/2018/KJE/160326

Keywords:

Cement-bound pavement mixtures, Semi-rigid pavement, Tensile testing, Fiber-reinforced cement stabilized mixture, Waste plastic fiber

Abstract

In many countries, cement bound granular mixtures (CBGMs) have been widely used in semi-rigid pavement as base/subbase layers to ensure better load-carrying capacity. However, due to their brittleness, CBGMs are susceptible to cracking under repeated traffic loading, which eventually accelerates pavement deterioration. To address this problem, this investigation was carried out to study the early age mechanical properties of CBGMs reinforced with polyethylene terephthalate (PET) fibers in terms of unconfined compressive strength (UCS), indirect tensile strength (ITS), bulk density, ultrasonic pulse velocity (UPV), static and dynamic modulus of elasticity, toughness, and ductility. Four fiber contents (0, 0.5, 1, and 1.5% by the volume of aggregate) were used. It was found that the inclusion of PET fiber reinforcement has significantly improved the tensile strength, toughness, and ductility by 19%, 203%, and 8.3 times, respectively. Moreover, it was noticed that incorporating PET fibers up to 1% resulted in a slight increase in compressive strength by 7.43%. Both bulk density and UPV, on the other hand, were declining due to PET fiber inclusion. Based on the outcomes of this study, CBGMs reinforced with PET fiber content of 1% are sustainable, cost-effective and environmental-friendly promising solutions

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