Chemically treated plastic replacing fine aggregate in structural concrete

El-Nadoury, Wegdan W.

doi:10.3389/fmats.2022.948117

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…Te present study has observed that the fexural strength is slightly less than 12% of the compressive strength at a similar combination of PETp and RHA. El-Nadourry [34] has also observed that the fexural strength of concrete containing 5% of PETp are comparable to conventional concrete. Te current study has observed that a further increase in either PETp or RHA beyond 3% and 9%, respectively, reduces the mechanical properties of concrete, which may be attributed to poor adhesion between the cement and the supplementary cementitious materials [35].…”

Section: Te Fresh and Mechanical Properties Analyzed Usingmentioning

confidence: 90%

Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology

Awolusi

Oguntayo

Aladegboye

et al. 2023

Journal of Engineering

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The continuous increase in population, advancement in technology, and affluence have influenced the amount of biodegradable and nonbiodegradable waste generated. Studies have shown that the utilization of different wastes in concrete is imperative to reduce the long-term environmental problems associated with their handling and management. This study evaluates the performance of concrete incorporating polyethene terephthalate powder (PETp) and rice husk ash (RHA) as supplementary cementitious materials varied at 0%, 7.5%, and 15%. Results indicated that the presence of PETp reduces workability while increasing the content of both PETp and RHA decreased the compressive and flexural strengths. A few studies have demonstrated the prediction and optimization of PETp as a fine aggregate. This study explores the central composite design of response surface methodology in optimizing the fresh and hardened properties of concrete incorporating PETp and RHA. The results indicate that workable concrete can be achieved with an RHA content higher than the PETp content. The analysis of variance provided effective models with good prediction capabilities. The simulated values from the models were close to those obtained experimentally. An optimal percentage of 5.76% PETp and 9.45% RHA was obtained for predicted responses and validated with a good level of accuracy. An overview of the different combinations of RHA and PETp indicates that concrete incorporating only RHA had the tendency to absorb the least water and exhibit low voids. However, the combination of 7.5% RHA and 7.5% PETp had a reduced water absorption when compared with a concrete mix containing 15% of either supplementary cementitious material. In general, eco-friendly concrete with improved durability can be produced by incorporating PETp and RHA.

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Section: Te Fresh and Mechanical Properties Analyzed Usingmentioning

confidence: 90%

Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology

Awolusi

Oguntayo

Aladegboye

et al. 2023

Journal of Engineering

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“…Ohemeng and Ekolu [26] stated that the absorption of concrete contained 20% of Low-density polyethylene (LDPE) to replace the sand increased the water absorption by 3.14%. El-Nadoury [27] reported that the water absorption increased by the incorporation of untreated plastic particles in concrete compared to those mixes made with chemically treated plastic. The increase in water absorption was higher than 300% for concrete mixes with 50% untreated plastic granules.…”

Section: Water Absorptionmentioning

confidence: 99%

Sustainable utilization of mixed healthcare waste as aggregate in lightweight concrete mixes: mechanical behavior, water absorption and leaching studies

Hamada,

Ismail,

Závodská

2023

JSTCE

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Wastes generated from healthcare practices are a serious problem for humans as well as for the environment. In this study, an attempt was made to use mixed solid medical waste (WPN) which consisted of shredded waste plastic and chopped waste needles for partial replacement of natural fine aggregate (sand) in concrete mixes at 0%, 2%, 4%, 6%, 8% and 10% by weight. To examine the validity of the suggested approach, the fundamental concrete properties including workability, fresh and hard densities, water absorption, compressive strength, and flexural strength as well as a leaching test were performed. The curing ages for the concrete mixes were considered to be 7, 14, and 28 days. Fifty-four cubes were molded for compressive strength test, and 72 prisms were cast for flexural strength, whereby 162 cubes were prepared for density tests as well as water absorption test. The results revealed that WPN-concrete mixes exhibited improvement in the workability and steadily decreased both the compressive and flexural strength values of the WPN-concrete mixes which were higher than the mean target strength of lightweight concrete grade M17. Leaching test results indicated the absence of the target components in the leachant. The outcomes of this experimental study demonstrated that reusing WPN as a sand-substitution aggregate in concrete is a good approach to reducing the adverse impact resulting from the improper management of healthcare and medical solid waste.

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“…However, it was obtained that there was no effect found on the density of concrete after the chemical treatment. El-Nadoury (2022) [11] also studied the use of treated PET plastic waste by using 5% polystyrene and 5% PKHH-phenoxy resin to increase the coarseness of the plastic aggregate as a sand replacement. Based on the results, this study confirmed the bond strength and mechanical properties improvement when the plastic aggregate was treated.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Modified Plastic Waste on the Porous Concrete Block Containing Fine Aggregate

Supit

Priyono

2023

Jurnal Teknologi

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Modification of plastic waste to be use as a replacement of coarse aggregate on the manufacturing of porous concrete block is presented in this paper. Different proportions of sand content were used with percentage of 1%, 5% and 10% by total weight of the sample to investigate its effects on the performance of porous concrete blocks based on some conducted tests i.e., compression and flexural load resistance, porosity, and infiltration rate tests. The results show that the porous concrete block with 5% of sand addition showed better strength properties compared to other mixtures. With 5% modified PET coarse aggregate, the compressive strength decreased for about 26%. Similar trends can be also observed when using PP and HDPE plastic aggregate. However, the inclusion of PET aggregate in porous concrete blocks with 5% of sand inclusion does not significantly show better strength indicating the weak bonding between plastic and cement mortar was performed in porous concrete block matrix as evident through the Scanning Electron Microscopy analysis. The formation of pores and higher permeability can be also expected after adding PET plastic waste as seen in porosity and infiltration rate results. Furthermore, the utilization of coarse aggregate made from plastic waste in porous concrete blocks containing fine aggregate is a potential solution on plastic waste management for permeable pavement including foot traffic and light load application.

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Chemically treated plastic replacing fine aggregate in structural concrete

Cited by 7 publications

References 35 publications

Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology

Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology

Sustainable utilization of mixed healthcare waste as aggregate in lightweight concrete mixes: mechanical behavior, water absorption and leaching studies

Utilization of Modified Plastic Waste on the Porous Concrete Block Containing Fine Aggregate

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