Performance of Self-Compacting mortars modified with Nanoparticles: A systematic review and modeling

Faraj, Rabar H.; Ahmed, Hemn Unis; Rafiq, Serwan; Sor, Nadhim Hamah; Ibrahim, Dalya F.; Qaidi‏, Shaker

doi:10.1016/j.clema.2022.100086

Cited by 63 publications

(27 citation statements)

References 32 publications

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“…ˑMost ˑUHPC ˑstructures ˑrequire ˑonly ˑhalf ˑthe ˑsection ˑdepth ˑof ˑtypical ˑreinforced ˑor ˑpre-stressed ˑconcrete ˑcomponents, ˑresulting ˑin ˑweight ˑsavings ˑof ˑup ˑto ˑ70% ˑ [96]. ˑUHPC ˑstructures' ˑlighter ˑweight ˑconstruction ˑand ˑmaterial ˑefficiency ˑresult" ˑin ˑa ˑmore ˑsustainable ˑstructure ˑwith ˑfewer ˑcarbon ˑfootprints ˑ [97] ˑ [98][99][100][101][102][103].…”

Section: Example Of Bridging Applicationsmentioning

confidence: 99%

Ultra-High-Performance Fiber-Reinforced Concrete: Applications

Qaidi‏¹

2022

Preprint

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UHPC is a type of cement-based composite used in new construction and/or rehabilitation of existing buildings to extend service life. It is a novel composite material that can serve as an alternative to concrete construction in hostile climates. Following decades of study and production, a diverse variety of commercial UHPC compositions are now available globally to meet the rising number of applicants and demand for high-quality building materials. Although UHPC offers major benefits over normal concrete, its utilization is restricted due to restrictive design rules and exorbitant costs. As a result, a thorough examination of the durability properties of UHPC is required to give important information for material testing requirements and processes, as well as to broaden its practical uses. This report is aimed at increasing basic understanding of UHPC and supporting more UHPC research and applications.

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Section: Example Of Bridging Applicationsmentioning

confidence: 99%

Ultra-High-Performance Fiber-Reinforced Concrete: Applications

Qaidi‏¹

2022

Preprint

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“…In this way, the environmental pressure on the concrete sector could be reduced, eliminating the need for natural capital and contributing to sustainable production [23,24]. For this purpose, in recent decades, several studies have considered waste plastic as a substitute aggregate in green concrete (also known as eco-friendly concrete) [25][26][27][28]. This approach has been affirmed by many studies which have argued that such recycling is essential for the ecosystem and economic gain [18][19][20]29].…”

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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“…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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Performance of Self-Compacting mortars modified with Nanoparticles: A systematic review and modeling

Cited by 63 publications

References 32 publications

Ultra-High-Performance Fiber-Reinforced Concrete: Applications

Ultra-High-Performance Fiber-Reinforced Concrete: Applications

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

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