The effect of using polyethylene terephthalate as an additive on the flexural and compressive strength of concrete

Umasabor, Richie I.; Daniel, Samuel.C.

doi:10.1016/j.heliyon.2020.e04700

Cited by 54 publications

(38 citation statements)

References 7 publications

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“…These are typical of different cutting and crushing processes of the waste, as shown in studies by Siqueira and Holanda [ 49 ]. As the particles present an irregular distribution, smaller sized particles can occupy the free spaces left by larger sized particles, forming particle packing [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

“…It is also estimated that they may have suffered interference in relation to cement hydration due to the type of cure used (humid chamber), damaging their strength. The incorrect hydration of the cement is generally due to the lack of water or humidity necessary for the cement to react, as shown in [ 49 , 50 , 51 , 52 ]. As for the ages, there was no difference for most of the treatments due to the cement used being CPV, which has greater strength gain at early ages in view of its better quality due to finer grinding.…”

Section: Resultsmentioning

confidence: 99%

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Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

Silva

Cecchin

Azevedo³

et al. 2021

Materials

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The ever-growing consumption and improper disposal of non-biodegradable plastic wastes is bringing worrisome perspectives on the lack of suitable environmentally correct solutions. Consequently, an increasing interest in the circular economy and sustainable techniques is being raised regarding the management of these wastes. The present work proposes an eco-friendly solution for the huge amount of discarded polyethylene terephthalate (PET) wastes by addition into soil-cement bricks. Room temperature molded 300 × 150 × 70 mm bricks were fabricated with mixtures of clay soil and ordinary Portland cement added with up to 30 wt.% of PET waste particles. Granulometric analysis of soil indicated it as sandy and adequate for brick fabrication. As for the PET particles, they can be considered non-plastic and sandy. The Atterberg consistency limits indicated that addition of 20 wt.% PET waste gives the highest plasticity limit of 17.3%; moreover, with PET waste addition there was an increase in the optimum moisture content for the compaction and decrease in specific weight. Standard tests showed an increase in compressive strength from 0.83 MPa for the plain soil-cement to 1.80 MPa for the 20 wt.% PET-added bricks. As for water absorption, all bricks displayed values between 15% and 16% that attended the standards and might be considered an alternative for non-structural applications, such as wall closures in building construction.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

Silva

Cecchin

Azevedo³

et al. 2021

Materials

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“…This is corroborated with the findings of Akinyele and Ajede (2018), Mustafa et al, (2019) and Almeshal et al, (2020). The decrease in workability of concrete with an increasing PET content was attributed to the fact that the plastic in the mix was not able to absorb the excess water thereby making a dry slump (Umasabor and Daniel, 2020). Thus, to achieve a similar degree of workability as experienced by the control, a higher water-tocement ratio will be required by the PET concrete.…”

Section: B Workability Of Concretementioning

confidence: 99%

Strength Characteristics of M40 Grade Concrete using Waste PET as Replacement for Sand

Olawale¹,

Kareem²,

Ojo³

et al. 2021

Nig. J. Technol. Dev.

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The wide variety of industrial and domestic applications of plastic products has fuelled a global trend in their use. The vast amount of plastic items that are discarded after use, on the other hand, pollutes the environment. In light of this, the current study investigated the use of Polyethylene Terephthalate (PET) as substitute for natural sand in concrete production. Locally sourced river sand was replaced with industrially ground waste PET in proportions of 4 to 20% at a step of 4% by the weight of natural sand whereas other concrete constituents (cement, granite, water-cement ratio and superplasticizer) were kept constant. A Grade M40 concrete with a mix proportion of 1:1:2:0.35 (cement: sand: granite: water-to-cement ratio) was used for all concrete mixes. Concrete without PET represents the control. Fresh (Slump) and hardened (compressive, split tensile and flexural) properties of the produced concrete were assessed using standard testing methods. The results showed that the slump of concrete decreased by 1.8% and 12.5% with an increase in PET content from 0 to 20%. The 28-day compressive strength of concrete containing PET was lower than the control. However, concrete with 4% PET compared considerably well with control with the compressive strength value exceeding the target strength of 40 N/mm2 while concretes containing PET beyond 4% had compressive strength below the target strength. The split tensile strength of concrete containing 4% PET was higher than that of the control but exhibited lower flexural strength than the control at the age of 28 days. It was concluded that the reuse of PET as a substitute for natural sand as an alternative waste disposal solution for eco-friendly concrete development and attainment of a pollution-free environment is viable.

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“…However, there are some disadvantages in the application of PET fiber. Some of the disadvantages of the use of plastic fiber are lower alkali resistance [10], lower flexural strength [11], and lower dynamic elastic modulus [12].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation for Mechanical Behaviour of Concrete Incorporating Recycled Plastic Bottle Fibers as Locally Available Materials

2021

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The objective of the study is to investigate the influence of Polyethylene Terephthalate (PET) recycled plastic bottle fibers on the compressive strength and cracking of concrete. In this study, two types of fiber are used: straight and zigzag fibers whose length and aspect ratio are 40 mm and 40 respectively. 0, 0.75, and 1.25% volume fractions of fibers replacing the volume of coarse aggregates are used in this investigation. According to ACI 211.1-91, design mixing ratio 1:2:3 for M20 concrete and water-cement ratio 0.58 are used. Curing is done in field condition and weathering action is allowed in curing time. The destructive compressive strength test shows that the compressive strength of plain concrete is 19.84 MPa, at 0.75 and 1.25% replacement for concrete with straight fibers are 19.54 and 18.84 MPa, and at 0.75 and 1.25% replacement for concrete with zigzag fibers are 18.49 and 15.69 MPa. The non-destructive compressive strength test shows that the compressive strength of plain concrete is 13.58 MPa, at 0.75 and 1.25% replacement for concrete with straight fibers are 10.36 and 8.82 MPa, and at 0.75 and 1.25% replacement for concrete with zigzag fibers are 8.21 and 8.10 MPa. The use of fibers changes the failure mode. The addition of fibers decreases the workability and cracking of concrete. Zigzag fiber slightly shows interlocking property with concrete. The addition of PET plastic fibers increases the ductility of concrete. Doi: 10.28991/cej-2021-03091684 Full Text: PDF

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The effect of using polyethylene terephthalate as an additive on the flexural and compressive strength of concrete

Cited by 54 publications

References 7 publications

Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

Strength Characteristics of M40 Grade Concrete using Waste PET as Replacement for Sand

Performance Evaluation for Mechanical Behaviour of Concrete Incorporating Recycled Plastic Bottle Fibers as Locally Available Materials

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