Degradation of recycled PET fibers in Portland cement-based materials

Silva, D.A.; Betioli, Andrea Murillo; Gleize, Philippe Jean Paul; Roman, Humberto Ramos; Gómez, Luis Alberto; Ribeiro, José Luís Duarte

doi:10.1016/j.cemconres.2004.10.040

Cited by 179 publications

(109 citation statements)

References 3 publications

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“…Wang et al 13 and Houget 14 observed that polyester fibers lose strength rapidly in the cement matrix due to their hydrolysis and dissolution in an alkaline environment. Silva 15 concluded that recycled PET fibers interact with Ca(OH) 2 and Lawrence solutions, their surface becomes rough and phases identified as alkaline terephthalates precipitate. In this work, the tested amount of PET fibers (0.4 and 0.8 vol.%) had no effect on the compressive, tensile or flexural strength of the mortars or their degradation inside the composite; however, the fracture toughness of the mortars in flexural tests increased when fibers were introduced.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of recycled PET fibers in concrete

et al. 2012

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Fiber-reinforced concrete represents the current tendency to apply more efficient crack-resistant concrete. For instance, polyethylene terephthalate (PET) is a polyester polymer obtained from recyclable bottles; it has been widely used to produce fibers to obtain cement-based products with improved properties. Therefore, this paper reports on an experimental study of recycled-bottle-PET fiber-reinforced concrete. Fibers with lengths of 10, 15 and 20 mm and volume fractions of 0.05, 0.18 and 0.30% related to the volume of the concrete were used. Physical and mechanical characterization of the concrete was performed, including the determination of compressive strength, flexural strength, Young's modulus and fracture toughness as well as analysis using mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). Flexure and impact tests were performed after 28 and 150 days. No significant effect of the fiber addition on the compressive strength and modulus of elasticity was observed. However, the Young's modulus was observed to decrease as the fiber volume increased. At 28 days, the concrete flexural toughness and impact resistance increased with the presence of PET fibers, except for the 0.05 vol.% sample. However, at 150 days, this improvement was no longer present due to recycled-bottle-PET fiber degradation in the alkaline concrete environment, as visualized by SEM observations. An increase in porosity also has occurred at 365 days for the fiber-reinforced concrete, as determined by MIP.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of recycled PET fibers in concrete

et al. 2012

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“…As an alternative to PP, low-density polyethylene [18] fibres were used to reduce plastic shrinkage cracking in concrete while somewhat reducing its compressive strength. Recycled polyethylene terephthalate (PET) fibres were also tried but found to degrade after exposure to the alkalinity of concrete [19,20].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

Pešić

Živanović

Garcia

et al. 2016

Construction and Building Materials

152

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This work investigates potential engineering benefits of the pioneering application of simply extruded recycled high-density polyethylene (HDPE) plastic fibres in structural concrete. Mechanical and serviceability properties of concrete are studied through the testing of seven series of specimens: one made of the plain concrete and, for each of the two fibre diameters Ø 1 = 0.25 mm and Ø 2 = 0.40 mm, three series with 0.40%, 0.75% and 1.25% volume fraction of fibres. While the compressive strength and the elastic modulus of concrete were unaffected, the tensile strength and flexural (rupture) modulus were marginally increased, between 3% and 14% in the presence of HDPE fibres. Fibres mainly contributed by providing the post-cracking flexural ductility and through improving serviceability properties of concrete such as the reduced plastic shrinkage cracking, drying shrinkage and water permeability. The durability of HDPE fibres was assessed by means of the scanning electron microscope (SEM) imaging that showed no signs of their chemical deterioration in concrete. All findings suggest that recycled HDPE fibres can be instrumental in creating a new value chain in construction industry while also positively contributing to its environmental performance.

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“…A number of scientific reports [56]- [60] concluded that an effective way to improve the toughness of concrete is adding a small fraction (usually 0.5 -2% by volume) of short fibers to the concrete mix during mixing. In the fracture process of fiber reinforced concrete (FRC), fibers stimulates the bridging between cracks in the matrix and thus provide resistance to crack propagation and crack opening before being pulled out or stressed to rupture.…”

Section: A Case Studiesmentioning

confidence: 99%

“…However, the cost of producing polymer concrete from waste plastics is still high. The other alternative method reported by Silva et al in 2005 andOchi et al in 2007 propose the use of waste PET bottles in the form of PET fibers to produce a lower-in-cost fiber reinforced concrete [56], [73]. The disadvantage of such method is the small volumetric amount of fiber content in the fiber reinforced concrete which is between (0.3 -1.5)%.…”

Section: International Journal Of Environmentalmentioning

confidence: 99%

Utilization of Recycled Polyethylene Terephthalate (PET) in Engineering Materials: A Review

Sulyman¹,

Haponiuk²,

Formela³

2016

IJESD

108

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Abstract-In general, the quantity of plastics of all types consumed annually all over the world has been growing in a phenomenal way. The manufacturing processes, service industries and municipal solid wastes (MSW) generate numerous waste plastic materials. The increasing awareness about the environment has tremendously contributed to the concerns related with disposal of the generated wastes. It is believed that the management of solid waste is one of the major environmental concerns in the world. Due to limited space on landfills and increasing costs of plastics, utilization of waste plastics has become an attractive alternative for disposal. This paper provides a summary of experimental efforts on the utilization of poly(ethylene terephthalate) (PET) in civil engineering projects, mainly in road pavement, cements and concretes. Presented data indicate that use of waste PET for modification of asphalt, cement and concretes improved their selected properties, which makes economical this approach. Furthermore, using of waste PET in building materials reduce usage of new polymeric materials, which has significant effect on environment pollution (e.g. emission of carbon dioxide, waste disposal problems, etc.) Index Terms-Bitumen, building materials, concrete, PET, recycling.

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Degradation of recycled PET fibers in Portland cement-based materials

Cited by 179 publications

References 3 publications

Mechanical properties of recycled PET fibers in concrete

Mechanical properties of recycled PET fibers in concrete

Mechanical properties of concrete reinforced with recycled HDPE plastic fibres

Utilization of Recycled Polyethylene Terephthalate (PET) in Engineering Materials: A Review

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