Effects of waste PET as coarse aggregate on the fresh and harden properties of concrete

Islam, Md Jahidul; Meherier, Md. Salamah; Islam, A. K. M. R.

doi:10.1016/j.conbuildmat.2016.08.128

Cited by 200 publications

(104 citation statements)

References 27 publications

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“…Tang et al [37] reported a similar increase in the slump of coarse plastic aggregate lightweight concrete at a replacement level up to 40%. An increase in slump was also found for somewhat higher replacement values (50%) by [22]. However, workability was found to decrease slightly at 60% and 80% plastic aggregate contents [34].…”

Section: Workabilitymentioning

confidence: 90%

“…The density of concrete depends on the specific gravity of the mix compositions and compactness of concrete. Since waste recycled plastics typically have lower density compared to natural aggregates, it is expected that both the fresh and the dry density will decrease in proportion to the substitution level [22,26,41,48,49]. Studies have shown that as the percentages of recycled plastic waste increased, the fresh density of concrete reduced, as shown in Figure 5 [28,50,51].…”

Section: Fresh and Dry Densitymentioning

confidence: 99%

See 1 more Smart Citation

Engineering Properties of Concrete with Waste Recycled Plastic: A Review

et al. 2018

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The abundance of waste plastic is a major issue for the sustainability of the environment as plastic pollutes rivers, land, and oceans. However, the versatile behavior of plastic (it is lightweight, flexible, strong, moisture-resistant, and cheap) can make it a replacement for or alternative to many existing composite materials like concrete. Over the past few decades, many researchers have used waste plastic as a replacement for aggregates in concrete. This paper presents a comprehensive review of the engineering properties of waste recycled plastic. It is divided into three sections, along with an introduction and conclusion. The influence of recycled waste plastics on the fresh properties of concrete is discussed first, followed by its influence on the mechanical and durability properties of concrete. Current experimental results have shown that the mechanical and durability properties of concrete are altered due to the inclusion of plastic. However, such concrete still fulfills the requirements of many engineering applications. This review also advocates further study of possible pre-treatment of waste plastic properties for the modification of its surface, shape, and size in order to improve the quality of the composite product and make its use more widespread.

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Section: Workabilitymentioning

confidence: 90%

Section: Fresh and Dry Densitymentioning

confidence: 99%

Engineering Properties of Concrete with Waste Recycled Plastic: A Review

et al. 2018

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“…Research findings concluded that the porosity and water permeability of concrete with plastic aggregates were higher than those of typical conventional concrete. Islam et al [11] deduced that the weak bonding at the ITZ between cement paste and plastic aggregates contributed to higher porosity and permeability. During cement hydration, redistribution of calcium-silicate-hydrate (C-H-S) allows the pores in the ITZ to be partially filled.…”

Section: Introductionmentioning

confidence: 99%

Modification of Waste Aggregate PET for Improving the Concrete Properties

Lee,

Paul,

Kong

et al. 2019

Advances in Civil Engineering

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Disposal of plastic wastes causes negative impacts including degradation of land and ocean and climate change. Reusing plastic wastes in concrete is one of the effective methods of reducing plastic disposal. Polyethylene terephthalate (PET) is one of the most abundantly available plastic wastes as it is commonly used for plastic bottles and food containers. This paper investigates the effects of treating PET wastes using hydrogen peroxide solution (H2O2) and calcium hypochlorite solution (Ca(ClO)2) before incorporating in concrete as coarse aggregate replacements. The physical and mechanical properties of concrete were analyzed for three different percentages, namely, 10%, 20%, and 30%, replacement of natural aggregates with plastic aggregates. For all percentage of replacements, it was found that chemically treated plastic aggregates have no effects on the fresh density, but the slump decreased due to roughened surface of treated plastic aggregates. Chemical treatment improved the bond strength between cementitious matrix and plastic aggregates and reduced the gap at the interfacial transition zone (ITZ). These phenomena contributed to the improvement the compressive strength and lower the permeability and porosity.

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“…The decrease in strength can be attributed to the fact that PET-aggregate cannot interact with cement paste and therefore the interfacial transition zone (ITZ) in concrete containing PET aggregate is weaker than that in the reference concrete, which results in lower compressive strength [24]. After 10% inclusion of PET waste in concrete, sudden decrease in compressive strength can be attributed to the fact that PET-aggregate has very low water absorption capacity which causes more accumulation of water in the transition zone and makes it weaker [37]. Brito [24].…”

Section: Compressive Strengthmentioning

confidence: 99%

Assessment of Mechanical and Durability Properties of Concrete Containing PET Waste

et al. 2018

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Plastic waste is a silent threat to the environment, and their disposal is a serious issue. To sort out this issue, many efforts were made to reuse the plastic waste, but no significant results were achieved. On the contrary, concrete being the widely used construction material is facing problem due to unavailability of ingredient material (sand and coarse aggregate). In this study PET (polyethylene terephthalate) aggregates manufactured from the waste un-washed PET bottles in shredded form were used to partially replace fine aggregate and coarse aggregate in concrete in various percentages (0%, 5%, 10%, 15% and 20%). Various tests like workability, compressive strength, flexural strength, water permeability, abrasion resistance, dynamic and static modulus of elasticity were performed. The micro-structural analysis of the specimens was carried out using an optical microscope. It was found that the workability, compressive strength, flexural strength, dynamic and static modulus of elasticity decreased with the increasing amount of PET waste in concrete. Water permeability of concrete was found to increase with increasing amount of PET waste. In both the cases, i.e., when fine and coarse aggregates were replaced with PET waste, an improvement in the abrasion resistance of concrete was found.

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Effects of waste PET as coarse aggregate on the fresh and harden properties of concrete

Cited by 200 publications

References 27 publications

Engineering Properties of Concrete with Waste Recycled Plastic: A Review

Engineering Properties of Concrete with Waste Recycled Plastic: A Review

Modification of Waste Aggregate PET for Improving the Concrete Properties

Assessment of Mechanical and Durability Properties of Concrete Containing PET Waste

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