Ultra-high-performance fiber-reinforced concrete. Part III: Fresh and hardened properties

Akeed, Mahmoud H.; Qaidi‏, Shaker; Ahmed, Hemn Unis; Emad, Wael; Faraj, Rabar H.; Mohammed, Ahmed; Tayeh, Bassam A.; Azevedo, Afonso Rangel Garcez de

doi:10.1016/j.cscm.2022.e01265

Cited by 34 publications

(24 citation statements)

References 133 publications

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“…ˑSince ˑthe ˑrisk ˑof ˑcorrosion ˑof ˑsteel ˑfiber ˑcan ˑbe ˑevidently ˑincreased ˑnear ˑthe ˑvoids at the fiber and matrix interface [93]. Besides the corrosion ˑrisks, ˑthe ˑporosity ˑcould ˑincrease the occurrence of ˑaggressive ˑionic ˑattack, and rapid ˑpenetration ˑto ˑthe ˑconcrete ˑsuch ˑas chloride and sulphate ˑ [78] [ [94][95][96].…”

Section: Homogeneity and Porositymentioning

confidence: 99%

“…ˑmight ˑlead ˑto ˑconcrete ˑdensification. ˑPreviously, ˑthe ˑeffects ˑof ˑvarious ˑadditional ˑmaterials ˑon ˑthe ˑmechanical ˑperformance, ˑpermeability, ˑand ˑchloride ˑdiffusion ˑof ˑa ˑcementitious material with and without fiber reinforcement ˑwere ˑinvestigated[89][90][91][94][95][96]. ˑOne ˑof ˑthese ˑextra materials could be ˑdescribed ˑas ˑhaving ˑpozzolanic ˑproperties.…”

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confidence: 99%

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

Qaidi‏¹

2022

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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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Section: Homogeneity and Porositymentioning

confidence: 99%

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confidence: 99%

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

Qaidi‏¹

2022

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“…ˑA ˑrise ˑin ˑthe ˑcuring ˑtemperature over 80 ºC, on the other hand, ˑhad ˑthe ˑopposite ˑimpact. ˑThe ˑhigh ˑcuring ˑtemperatures ˑ(between ˑ100 ˑand ˑ125 ˑºC) ˑresulted ˑin ˑa ˑlowering ˑof ˑthe ˑamount ˑof ˑalkaline ˑmedium ˑpresent, ˑwhich ˑprevented the dissolution ˑof ˑsilica ˑand ˑalumina ˑtypes [118][119][120]122].…”

Section: Mine Tailings As Precursors For Geopolymermentioning

confidence: 99%

“…ˑAccording to its findings, ˑthe ˑmaximum ˑcompressive ˑstrength ˑof ˑgold ˑmine ˑtailings-geopolymer ˑcomposites was discovered ˑat ˑa ˑpotassium ˑsilicate/potassium ˑhydroxide proportion ˑof ˑ1.1. ˑAccording ˑto ˑits ˑfindings, ˑraising ˑthe ˑcuring ˑtemperature ˑfrom ˑ65 ˑto ˑ100 ˑºC ˑenhanced ˑthe ˑcompressive ˑstrength ˑof ˑpotassium ˑaluminate ˑand ˑpotassium ˑhydroxide-activated ˑgold ˑmine tailings-geopolymer composites [122,133,134]. The researchers ˑalso ˑdiscovered ˑthat ˑthe ˑcompressive ˑstrength of geopolymer ˑactivated ˑby ˑpotassium ˑaluminate ˑand ˑpotassium hydroxide activators ˑis ˑgreater ˑthan ˑthat ˑof ˑgeopolymer ˑactivated ˑby ˑpotassium ˑsilicate ˑand ˑpotassium ˑhydroxide ˑactivators, ˑeven ˑwhen ˑthe ˑcuring ˑtemperature ˑis ˑraised ˑto up to 100 ºC.…”

Section: Mine Tailings As Precursors For Geopolymermentioning

confidence: 99%

Mine tailings-based geopolymers: Mechanical and physical properties

Ahmed¹

2022

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<p> </p> <p>The mining sector generates a substantial quantity of stone waste and tailings, which constitutes an environmental risk. The most prevalent method for disposing of this industrial waste is dumping, which contributes to soil deterioration and water contamination while acquiring precious land. It can be recycled using a number of processes, such as the promising geopolymerization technique, which transforms waste into value. This study reviews current developments in the manufacturing of mine tailings-based geopolymer composites from industrial waste as a possible sustainable building material. This paper also gives in-depth studies on the characteristics and behaviors of mine tailings composites used in geopolymer manufacturing, including physical and mechanical properties. This review also identifies knowledge gaps that must be filled in order to advance mine tailings composites for geopolymers.</p>

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“…UHPC is a high-strength, high-durability ˑcementitious ˑmaterial ˑ [1][2][3][4][5]. ˑIt ˑhas ˑthe ˑpotential ˑto ˑbe ˑa ˑviable ˑsolution ˑfor ˑimproving ˑthe ˑ"sustainability ˑof ˑbuildings ˑand ˑother ˑinfrastructure ˑcomponents ˑ [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Ultra-high-performance fiber-reinforced concrete (UHPFRC): A mini-review of the challenges

Qaidi‏

2022

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Ultra-high-performance concrete (UHPC) is a cement-based material that can be used to build new buildings or fix up old ones to make them last longer. It is a revolutionary composite material that may serve as a viable substitute for concrete construction in hostile environments. After decades of research and development, a broad variety of commercial UHPC compositions have been created across the globe to meet the expanding number of uses and demand for high-quality building materials. The usage of ultra-high performance concrete is restricted because of its exorbitant cost and restricted design standards. Therefore, a thorough examination of the durability properties of UHPC is necessary to offer vital data for material testing criteria and methods and to broaden its practical uses. It is hoped that this article will help people understand UHPC better and encourage more research and applications.

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Ultra-high-performance fiber-reinforced concrete. Part III: Fresh and hardened properties

Cited by 34 publications

References 133 publications

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

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

Mine tailings-based geopolymers: Mechanical and physical properties

Ultra-high-performance fiber-reinforced concrete (UHPFRC): A mini-review of the challenges

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