The Impact of Nano Clay on Normal and High-Performance Concrete Characteristics: A Review

Mansi, Aseel S.; Sor, Nadhim Hamah; Hilal, Nahla; Qaidi‏, Shaker

doi:10.1088/1755-1315/961/1/012085

Cited by 55 publications

(31 citation statements)

References 75 publications

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“…ˑOther ˑUHPC ˑuses ˑinclude ˑbuilding, ˑstructural ˑstrengthening, ˑretrofitting, ˑprecast ˑelements, ˑand ˑother ˑunique ˑapplications ˑ [29, ˑ51]. ˑBoth ˑbusiness ˑand ˑpublic ˑsectors ˑare ˑfocusing ˑtheir ˑefforts ˑand ˑresources ˑon ˑexploiting UHPC as the future sustainable" construction material [58][59][60][61][62][63][64][65][66][67][68][69][70][71].…”

Section: 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: Applicationsmentioning

confidence: 99%

Ultra-High-Performance Fiber-Reinforced Concrete: Applications

Qaidi‏¹

2022

Preprint

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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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“…To improve the strength, "rheology, ˑand ˑsustainability ˑof ˑUHPC ˑwith ˑappropriate ˑrheology, ˑthe ˑbinder ˑconcentration ˑmust ˑbe ˑreduced ˑeven ˑfurther. ˑParticle ˑpacking ˑover ˑthe ˑentire ˑparticle ˑsize ˑdistribution ˑwith ˑoptimal ˑuse ˑof ˑadhesive ˑand ˑspace-filling ˑcapabilities ˑof ˑhydrates ˑis ˑgenerally ˑstudied ˑfor ˑUHPC ˑoptimization ˑ [40][41][42][43][44][45]. ˑHowever, ˑdeveloping ˑa ˑUHPC ˑformulation ˑwith ˑa ˑcertain ˑrange ˑof ˑcharacteristics, ˑsuch ˑas ˑrheology, ˑstructural ˑbuild-up, ˑhardening ˑkinetics, ˑmicrostructure, ˑmechanical ˑproperties, ˑdurability, ˑand ˑsustainability, ˑmight ˑbe ˑdifficult.…”

Section: Rheologymentioning

confidence: 99%

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

Qaidi‏

2022

Preprint

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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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The Impact of Nano Clay on Normal and High-Performance Concrete Characteristics: A Review

Cited by 55 publications

References 75 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 (UHPFRC): A mini-review of the challenges

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