Sustainable construction via novel geopolymer composites incorporating waste plastic of different sizes and shapes

Lazorenko, Georgy; Kasprzhitskii, Anton; Fini, Elham H.

doi:10.1016/j.conbuildmat.2022.126697

Cited by 38 publications

(25 citation statements)

References 56 publications

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“…The geopolymer mortar [5] with Polyethylene Terephthalate (PET) in the form of shredded flakes, strips and ground particles was examined. The grinded particles showed maximum workability.…”

Section: Review Of Literaturementioning

confidence: 99%

Red Soil Geopolymer With Plastic Aggregates

2023

IRJMETS

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In this paper an environment friendly and sustainable concrete similar to Low Temperature Geopolymeric Setting(LTGS) composite is manufactured using red soil as fine aggregate, plastic nodules as coarse aggregate and geopolymer solution as binder . The above components were mixed in various ratios and cast into cubes of 50 sq. cm. The cubes were tested for compressive strength, water absorption and unit weight. The results show that the geopolymer concrete with fly ash or without fly ash can be manufactured with plastic aggregates with strength around 6-11 Mpa. With wwater absorption less than 17% and density around 1 to 1.4 gms/cc.

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“…The geopolymer mortar [5] with Polyethylene Terephthalate (PET) in the form of shredded flakes, strips and ground particles was examined. The grinded particles showed maximum workability.…”

Section: Review Of Literaturementioning

confidence: 99%

Red Soil Geopolymer With Plastic Aggregates

2023

IRJMETS

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“…The construction industry has also resulted in waste plastic (WP) generation with the constant need for new infrastructure worldwide [ 5 ]. Unfortunately, this has resulted in a high demand for construction materials which have contributed significantly to waste production, and this was identified as one key factor in the construction industry contributing to pollution worldwide [ 6 ]. The negative environmental implications of WP, as corroborated by Zhang et al [ 7 ] and Xiang et al [ 8 ], cannot be overemphasised as it disintegrates into micro-plastics (MPs, 1 μm–5 mm) and nano-plastics (NPs, 1 nm–1000 nm) in nature due to ultraviolet (UV) radiation, physical abrasion, biological metabolism, mechanical, and temperature changes, and the resultant micro-plastics impact on water and soil quality.…”

Section: Introductionmentioning

confidence: 99%

“…The increased production of WP does, therefore, require effective strategies to be adopted and implemented to reduce the potential negative health and environmental impacts. These strategies include recycling/reusing using mechanical, biological, or thermochemical techniques, incineration for energy recovery, and landfilling [ 1 , 6 ]. However, only 9% of waste plastic is recycled worldwide, while 80% is disposed in landfill or dispersed in both terrestrial and aquatic ecosystems [ 6 , 7 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…These strategies include recycling/reusing using mechanical, biological, or thermochemical techniques, incineration for energy recovery, and landfilling [ 1 , 6 ]. However, only 9% of waste plastic is recycled worldwide, while 80% is disposed in landfill or dispersed in both terrestrial and aquatic ecosystems [ 6 , 7 , 15 ]. Additionally, the incineration approach is not sustainable as it involves a combustion process that emits carbon dioxide (CO 2 ) gas along with potentially toxic elements into the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…After the initial grinding and sizing of WP, granules below the size of 4 mm are employed as fine aggregates, while the fibres are used as additives. Also, roughly crushed WP above 5 mm was used to replace coarse aggregates [ 6 , 24 ]. In terms of lower density, unit weight and thermal conductivity, building materials incorporating WP have demonstrated suitable material properties compared to building materials without WP replacement.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and Microstructural Investigation of Geopolymer Concrete Incorporating Recycled Waste Plastic Aggregate

Adeleke,

Kinuthia,

Oti

et al. 2024

Materials

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The effective use of waste materials is one of the key drivers in ensuring sustainability within the construction industry. This paper investigates the viability and efficacy of sustainably incorporating a polylactic acid-type plastic (WP) as a 10 mm natural coarse aggregate (NA) replacement in geopolymer concrete. Two types of concrete (ordinary Portland cement—OPC and geopolymer) were produced for completeness using a concrete formulation ratio of 1:2:3. The ordinary concrete binder control was prepared using 100% OPC at a water/binder ratio of 0.55, while the geopolymer concrete control used an optimum alkaline activator/precursor—A/P ratio (0.5) and sodium silicate to sodium hydroxide—SS/SH volume ratio (1.2/0.8). Using the same binder quantity as the control, four concrete batches were developed by replacing 10 mm NA with WP at 30 and 70 wt% for ordinary and geopolymer concrete. The mechanical performance of the developed concrete was assessed according to their appropriate standards, while a microstructural investigation was employed after 28 days of curing to identify any morphological changes and hydrated phases. The results illustrate the viability of incorporating WP in geopolymer concrete production at up to 70 wt% replacement despite some negative impacts on concrete performance. From a mechanical perspective, geopolymer concrete indicated a 46.7–58.3% strength development superiority over ordinary concrete with or without WP. The sample composition and texture quantified using automated scanning electron microscopy indicated that adding WP reduced the presence of pores within the microstructure of both concrete types. However, this was detrimental to the ordinary concrete due to the low interfacial zone (ITZ) between calcium silicate hydrate (CSH) gel and WP, resulting in the formation of cracks.

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Sustainable geopolymers from polyethylene terephthalate waste and industrial by-products: a comprehensive characterisation and performance predictions

Haq,

Sood,

Kumar

et al. 2024

J Mater Sci

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Several researchers have recently worked to create sustainable building materials. One of the fundamental prerequisites for sustainable construction methods and environmental impact assessments is the use of green building materials and manufacturing processes. In this research study, geopolymer bricks were developed using polyethylene terephthalate waste and different industrial by-products (rice husk ash, ground granulated blast furnace slag, red mud, construction, and demolition waste) and investigated their performances. The polyethylene terephthalate waste was used as a replacement for sand filler in the geopolymer brick up to 100%. Key findings include a workability decrease of 14.75% and a compressive strength reduction of up to 75% with 100% plastic waste replacement, attributed to increased voids and weak geopolymer matrix interaction. Dry density consistently decreases, and water absorption rises to 13.73% with full sand replacement, indicating a porous structure. Impact resistance improves with plastic waste inclusion, enhancing ductility and thermal conductivity by 57% at full replacement. Microstructural analyses reveal correlations between physical–mechanical properties and changes in porosity, microcracks, and bond strength. Machine learning, especially linear regression, proves effective for strength parameter prediction (up to 100% efficacy, R-square of 0.998). The promising results obtained could offer a substantial environmentally friendly solution to the building and construction industry in line with Circular Economy principles.

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Sustainable construction via novel geopolymer composites incorporating waste plastic of different sizes and shapes

Cited by 38 publications

References 56 publications

Red Soil Geopolymer With Plastic Aggregates

Red Soil Geopolymer With Plastic Aggregates

Mechanical and Microstructural Investigation of Geopolymer Concrete Incorporating Recycled Waste Plastic Aggregate

Sustainable geopolymers from polyethylene terephthalate waste and industrial by-products: a comprehensive characterisation and performance predictions

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