Mechanical properties of eco-friendly cements-based glass powder in aggressive medium

Almeshal, Ibrahim; Al-Tayeb, Mustafa Maher; Qaidi‏, Shaker; Bakar, B.H. Abu; Tayeh, Bassam A.

doi:10.1016/j.matpr.2022.03.613

Cited by 68 publications

(32 citation statements)

References 40 publications

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“…The main issue with plastic waste is that it can contain organic and inorganic components, such as food waste; this complicates recycling, and much of this material ends up in landfills. As a result, there is likely to be a lack of landfill sites in the future and increased environmental impact because most wastes are non-biodegradable and stay in the environment for tens of thousands, if not hundreds of years [8][9][10][11]. Therefore, valorization of waste plastic as fibers [12,13] or concrete aggregates [6,14] has become an opportunity.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate

et al. 2022

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In recent decades, several studies have considered the use of plastic waste as a partial substitute for aggregate in green concrete. Such concrete has been limited to non-structural applications due to its low strength. This raises whether such concrete can be enhanced for use in some structural applications. This paper reports an attempt to develop a structural-grade concrete containing plastic waste aggregate with high proportions of substitution and confined with carbon fiber reinforced polymer (CFRP) fabrics. Experimental research was conducted involving the casting and testing 54 plain and confined concrete cylinders. A concrete mixture was designed in which the fine aggregate was partially replaced by polyethylene terephthalate (PET) waste plastic at ratios of 0%, 25%, and 50%, and with different w/c ratios of 0.40, 0.45, and 0.55. The results show that confinement has a substantial positive effect on the compressive behavior of PET concrete. The enhancement efficiency increases by 8–190%, with higher enhancement levels for higher substitution ratios. Adding one layer of CFRP fabric raises the ultimate strength of samples that have lost compressive strength to a level close to that of unconfined samples not containing PET. This confinement is accompanied by an increase in the slope of the stress-strain curve and greater axial and lateral strain values at failure. For the specimens confined by CFRP fabric, PET aggregate can be used as a partial substitute for sand at a replacement ratio of up to 50% by volume for structural applications. This paper also considers the ability of existing models to predict the strength of confined-PET concrete circular cross-sections by comparing model predictions with experimental results. The strength of confined PET concrete elements can’t be accurately predicted by any of the models that are already out there. It’s important to come up with a new model for these elements.

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Section: Introductionmentioning

confidence: 99%

Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate

et al. 2022

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“…ˑHowever, ˑthe ˑmajor ˑpurpose ˑof ˑutilizing ˑfiber ˑin ˑthe ˑconcrete ˑmix is to transfer the generated load ˑacross ˑdifferent ˑparticles ˑand ˑto ˑprepare ˑthe ˑload ˑtransferring ˑconsistency. ˑThis ˑconsistency ˑcould ˑbe ˑlowered ˑby ˑweakening ˑthe ˑbond ˑbetween ˑthe ˑsteel ˑfiber ˑand" ˑthe ˑmatrix [33,[38][39][40]92].…”

Section: Homogeneity and Porositymentioning

confidence: 99%

“…ˑNataraja, et al [36] ˑreported ˑthat ˑfibers ˑwith ˑa ˑgreater ˑratio ˑof ˑL/f ˑyield ˑa ˑhigher ˑcompressive ˑstrength ˑin ˑthe ˑconcrete. ˑZheng and Feldman [37] ˑshowed ˑthat ˑfibers ˑwith ˑhigher ˑtensile ˑstrength ˑand ˑhigher ˑelastic ˑmodulus ˑcould ˑsignificantly ˑimprove ˑthe ˑmechanical ˑperformance ˑof ˑconcrete [38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Ultra-High-Performance Fiber-Reinforced Concrete: Fresh Properties

Qaidi‏¹

2022

Preprint

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UHPC is a cement-based composite that is used in new construction and/or renovation of existing structures to increase their service life. It is a unique composite material that may be used as an alternative to concrete in harsh conditions. Following decades of research and development, a wide range of commercial UHPC compositions are now accessible across the world to fulfill the growing number of applications and demand for high-quality construction materials. Although UHPC has significant advantages over conventional concrete, its use is limited because of rigid design restrictions and excessive pricing. As a consequence, a detailed analysis of UHPC's durability qualities is necessary to provide critical information for material testing requirements and methods, as well as to widen its practical applications. The goal of this study is to learn more about UHPC and to encourage more research and use of UHPC.

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“…ˑFalayi ˑ [50] ˑdemonstrated ˑthat ˑactivating ˑwith ˑpotassium ˑaluminate ˑresults ˑin ˑa ˑbetter ˑresistance ˑof ˑgeopolymers ˑto ˑalternate ˑwetting ˑand ˑdrying ˑthan ˑpotassium ˑsilicate. ˑIn ˑevery ˑcase, ˑthe ˑUCS ˑvalues ˑdropped ˑmore ˑthan ˑthreefold ˑafter ˑ10 ˑwet ˑand ˑdry ˑcycles ˑ [51][52][53][54][55][56]. ˑThis ˑmakes ˑit ˑdifficult ˑto ˑuse ˑthese ˑcomposites ˑin ˑplaces ˑwhere ˑthere ˑis ˑa ˑlot ˑof ˑwet ˑand ˑdry ˑtime, ˑand ˑit ˑalso ˑmakes ˑit ˑimportant ˑto ˑlook ˑinto ˑways ˑto ˑmitigate ˑthis.…”

Section: Durability Propertiesmentioning

confidence: 99%

Mine tailings-based geopolymers: Durability, microstructure, thermal and leaching properties

Akeed

2022

Preprint

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The mining industry produces a considerable amount of stone waste and tailings, posing an ecological danger. This industrial waste is often disposed of via landfill, which leads to soil degradation and water and air pollution while obtaining valuable land. It can be recycled via a variety of methods, including the promising geopolymerization approach, which converts waste into value. This research investigates recent advancements in the production of geopolymer composites derived from industrial waste and mine tailings as a potential sustainable construction material. This research also provides in-depth analyses of the features and behaviours of mine tailings mixtures utilized in geopolymer production, such as their durability, microstructure, thermal and leaching capabilities. This study also reveals an information gap that must be addressed to progress mine tailings composites for cementitious materials.

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Mechanical properties of eco-friendly cements-based glass powder in aggressive medium

Cited by 68 publications

References 40 publications

Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate

Investigation of the effectiveness of CFRP strengthening of concrete made with recycled waste PET fine plastic aggregate

Ultra-High-Performance Fiber-Reinforced Concrete: Fresh Properties

Mine tailings-based geopolymers: Durability, microstructure, thermal and leaching properties

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