Investigation of the physical-mechanical properties and durability of high-strength concrete with recycled PET as a partial replacement for fine aggregates

Qaidi‏, Shaker; Al-Kamaki, Yaman S.S.; Hakeem, Ibrahim Y.; Dulaimi, Anmar F.; Özkılıç, Yasin Onuralp; Sabri, Mohanad Muayad Sabri; Сергеев, В. В.

doi:10.3389/fmats.2023.1101146

Cited by 49 publications

(23 citation statements)

References 53 publications

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“…The most widely used plastic in the world is polyethylene terephthalate, which is used for a variety of purposes such as food and drink bottles and containers [18]. It is a clear polymer that, under varied stresses, has good mechanical properties and dimensional stability.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Heat-Processed Artificial Lightweight Aggregates from Polyethylene Terephthalate Plastic Waste

Uche,

Abubakar,

Nnamchi

et al. 2024

Preprint

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Plastic waste is an undeniable source of pollution that threatens the existence of the earth’s flora and fauna. The bulk of plastic wastes generated globally does not go through the proper methods of disposal but is carelessly discarded into the aquatic or terrestrial environment. Current recycling efforts are largely inadequate and disposal in landfills is still fraught with environmental and land use challenges. The proper disposal of plastic waste, as well as mitigating the environmental, social, and health impacts of extracting natural aggregates can be achieved by incorporating plastic waste as aggregates in the construction industry. This paper presents a characterization of aggregates manufactured from polyethylene terephthalate plastic waste using thermal/mechanical methods. Morphological, intrinsic and mechanical characteristics of the produced aggregates were established using standard procedures and equipment. The results of morphological characterization show a dense graded aggregate with fineness modulus of 4.25, flakiness index of 26% and elongation index of 16%. Intrinsic characterization yielded particle density of 1330kg/m3, bulk density of coarse aggregates of 715kg/m3 and water absorption of 0.445%. Mechanical characteristics of aggregates were evaluated, with compressive strength of 50Mpa, Aggregate Crushing Value of 37%, Ten Percent Fines Value of 71KN, Aggregate Impact Value of 24% and Aggregate Abrasion Value of 20%. The characteristics of PET aggregates confirm their suitability for application in structural lightweight concrete and rigid pavement. The produced PET aggregates can be considered in mix design as a total or partial replacement of natural aggregates in concrete.

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Section: Introductionmentioning

confidence: 99%

“…Their morphology does not allow for full characterization similar to natural or artificial lightweight aggregates. Characteristics of mechanically produced aggregates usually determined include particle size gradation, fineness modulus, particle density, water absorption, and specific gravity [16], [18], [44], [49].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Heat-Processed Artificial Lightweight Aggregates from Polyethylene Terephthalate Plastic Waste

Uche,

Abubakar,

Nnamchi

et al. 2024

Preprint

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show abstract

“…The opportunity of using recycled aggregates to produce new mortar and concrete compositions has attracted the attention of several researchers. Different types of recycled aggregates, such as waste glass [ 12 , 13 ], rubber tree seed shells [ 14 ], coconut fiber [ 15 ], bottom ash [ 16 ], PET plastic waste [ 17 ], waste marble [ 18 , 19 ], and iron slag [ 20 ], have been investigated as replacements for aggregate.…”

Section: Introductionmentioning

confidence: 99%

A New Environmentally Friendly Mortar from Cement, Waste Marble and Nano Iron Slag as Radiation Shielding

et al. 2023

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Improving mortar shielding properties to preserve environmental and human safety in radiation facilities is essential. Conventional cement mortars, composed of cement, water, and lime aggregate, are crucial for radiation shielding. Using recycled aggregates to produce new mortar and concrete compositions has attracted the attention of several researchers. In the current study, waste marble and iron slag as aggregates are used to create novel cement mortar compositions to study the aggregate’s impact on the radiation attenuation capability of the mortar. Three mortar groups, including a control mortar (CM-Ctrl), were prepared based on cement and waste marble. The other two groups (CM-MIS, CM-NIS), contained 25% iron slag at different particle sizes as a replacement for a waste marble. The study aims to compare iron slag in their micro and nano sizes to discuss the effect of particle size on the mortar radiation capability. For this purpose, the NaI scintillation detector and radioactive point sources (241Am, 133Ba, 137Cs, 60Co, and 152Eu) were utilized to measure several shielding parameters, such as the linear attenuation coefficient (LAC), mass attenuation coefficient (MAC), half-value layer (HVL), tenth-value layer (TVL), and mean free path (MFP), for the produced mortars at different photon energies. Furthermore, the transmission electron microscope (TEM) is used to measure the particle size of the aggregates. In addition, a scanning electron microscope (SEM) is utilized to acquire the cross-section morphologies of the prepared mortars. According to our findings, mortars prepared with nano-iron slag and waste marble offered superior shielding capabilities than mortars containing natural sand or fine crushed stone. The nano iron slag mortar can be utilized in place of typical sand mortar for applications as rendering or plastering materials for building medical diagnostic and CT scanner rooms, due to its improved shielding abilities.

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“…The recycling of concrete garbage not only satisfies the requirement of sustainable development, but also makes a huge contribution to the protection of the environment and the conservation of land resources [ 3 ]. At present, various types of recycled aggregates can replace natural aggregates to varying degrees for use in concrete materials, such as waste powder, fine and coarse marble aggregates [ 4 , 5 ], waste glass [ 6 , 7 , 8 ], recycled coal bottom ash [ 9 ], plastic waste [ 10 ], etc. With the increasing demand for sustainable development, recycled aggregate concrete (RAC), as a sustainable material, has received much attention in recent years due to its potential benefits in reducing environmental impact and conserving natural resources [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pretreatment Methods on Compressive Performance Improvement and Failure Mechanism Analysis of Recycled Aggregate Concrete

Huang²,

Wang

2023

Materials

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The utilization of recycled aggregate can avert the squandering of resources and the destruction of the environment. Nevertheless, there exists a slew of old cement mortar and microcracks on the surface of recycled aggregate, which give rise to the poor performance of aggregates in concrete. In this study, for the sake of ameliorating this property of recycled aggregates, the surface of the recycled aggregates is covered with a layer of cement mortar to compensate for the microcracks on the surface and reinforce the bond between old cement mortar and aggregates. In order to demonstrate the influence of recycled aggregate by different cement mortar pretreatment methods, this study prepared natural aggregate concrete (NAC) and concretes with recycled aggregate after the wetting pretreatment (RAC-W) and cement mortar pretreatment (RAC-C), and conducted uniaxial compressive strength tests on different types of concrete at different curing ages. The test results indicated that the compressive strength of RAC-C at a 7 d curing age was higher than that of RAC-W and NAC, and the compressive strength of RAC-C at a 28 d curing age was higher than RAC-W but lower than NAC. The compressive strength of NAC and RAC-W at a 7 d curing age was about 70% of that at a 28 d curing age, and the compressive strength of RAC-C at a 7 d curing age was about 85–90% of that at a 28 d curing age. The compressive strength of RAC-C increased dramatically at the early stage, while the post-strength of the NAC and RAC-W groups increased rapidly. The fracture surface of RAC-W mainly occurred in the transition zone between the recycled aggregates and old cement mortar under the pressure of the uniaxial compressive load. However, the main failure of RAC-C was the crushing destruction of cement mortar. With changes in the amount of cement added beforehand, the proportion of aggregate damage and A-P interface damage of RAC-C also changed accordingly. Therefore, the recycled aggregate pretreated with cement mortar can significantly improve the compressive strength of recycled aggregate concrete. The optimal amount of pre-added cement was 25%, which is recommended for practical engineering.

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Investigation of the physical-mechanical properties and durability of high-strength concrete with recycled PET as a partial replacement for fine aggregates

Cited by 49 publications

References 53 publications

Characterization of Heat-Processed Artificial Lightweight Aggregates from Polyethylene Terephthalate Plastic Waste

Characterization of Heat-Processed Artificial Lightweight Aggregates from Polyethylene Terephthalate Plastic Waste

A New Environmentally Friendly Mortar from Cement, Waste Marble and Nano Iron Slag as Radiation Shielding

Influence of Pretreatment Methods on Compressive Performance Improvement and Failure Mechanism Analysis of Recycled Aggregate Concrete

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