Ohio’s Research Initiative for Locals (ORIL) Research On-Call Task 6 – An Experimental Study on the Influence of Polyester Fibers, Plastic, Glass, and Tire Waste on Low-Strength Concrete Performance
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2023-09-01
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Edition:Final Report
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Abstract:Spearheaded by Defiance County, the research to develop a cost-efficient, flexible concrete mix was carried out by Ohio University's Departments of Civil and Environmental Engineering. The study explored the integration of locally-sourced waste materials—tire shreds, fiberglass, polyester fiber, and plastic waste—into the concrete mix. Rigorous testing protocols, aligned with ASTM C39/C39M and C496/C496M-17 standards, were employed to measure the compressive strength, split tensile strength and elastic modulus of the modified concrete. The results were compelling: inclusion of polyester fibers resulted in a 60% improvement in compressive strength and a 141% enhancement in elastic modulus. Tire shreds also positively influenced the mix, with an 84% increase in compressive strength and a 138% boost in elastic modulus. However, these figures come with a cautionary note regarding the uniform distribution of tire shreds in real-world applications. Additionally, these materials led to significant increases in split tensile strength, with polyester fibers and tire waste showing gains of 17% and 130%, respectively. Glass fibers also contributed positively but to a lesser extent. In contrast, plastic waste had a detrimental effect, causing a 40% decrease in compressive strength and a 62% reduction in elastic modulus. Strain at failure varied significantly among the mixes. Glass fiber exhibited the highest strain, 254% relative to the control, while polyester had a 94% increase, and the combined mixes ranged from 45% to 128% relative to the control. The study uncovered the nuanced challenges and opportunities of using waste materials in concrete, presenting avenues for sustainable construction solutions.
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