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Mechanical properties of recycled PET fibers in concrete

Materials research (São Carlos, São Paulo, Brazil), 2012-08, Vol.15 (4), p.679-686 [Peer Reviewed Journal]

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. ;ISSN: 1516-1439 ;ISSN: 1980-5373 ;EISSN: 1980-5373 ;DOI: 10.1590/S1516-14392012005000088

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  • Title:
    Mechanical properties of recycled PET fibers in concrete
  • Author: Pelisser, Fernando ; Montedo, Oscar Rubem Klegues ; Gleize, Philippe Jean Paul ; Roman, Humberto Ramos
  • Subjects: Compressive strength ; Concretes ; ENGINEERING, CHEMICAL ; Fiber reinforced concretes ; fiber-reinforced concrete ; Fibers ; Fibres ; MATERIALS SCIENCE, MULTIDISCIPLINARY ; Mechanical properties ; METALLURGY & METALLURGICAL ENGINEERING ; Modulus of elasticity ; Polyethylene terephthalates ; recycled PET ; synthetic fibers
  • Is Part Of: Materials research (São Carlos, São Paulo, Brazil), 2012-08, Vol.15 (4), p.679-686
  • Description: Fibre-reinforced concrete is important in the search for more efficient crack-resistant concrete. Polyethylene terephthalate (PET), a polyester polymer obtained from recyclable bottles, has been widely used to produce fibres to obtain cement-based products with improved properties. Recycled-bottle-PET fibre-reinforced concrete was studied experimentally. Fibres of length 10, 15 and 20 mm and volume fractions of 0.05, 0.18 and 0.30% relative to the volume of the concrete were used. Physical and mechanical properties of the concrete were investigated, including compressive strength, flexural strength, Young's modulus and fracture toughness, as well as analysis using mercury intrusion porosimetry (MIP) and SEM. Flexure and impact tests were performed after 28 and 150 days. No significant effect of the fibre addition on the compressive strength and modulus of elasticity was observed. However, the Young's modulus decreased as the fibre volume increased. At 28 days, the concrete flexural toughness and impact resistance increased with the presence of PET fibres, except for the 0.05 vol% sample. However, at 150 days, this improvement was no longer present due to recycled-bottle-PET fibre degradation in the alkaline concrete environment, as observed by SEM. An increase in porosity also occurred at 365 days for the fibre-reinforced concrete, as determined by MIP.
  • Publisher: ABM, ABC, ABPol
  • Language: English;Portuguese;Spanish
  • Identifier: ISSN: 1516-1439
    ISSN: 1980-5373
    EISSN: 1980-5373
    DOI: 10.1590/S1516-14392012005000088
  • Source: SciELO
    GFMER Free Medical Journals
    DOAJ Directory of Open Access Journals
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