Impact of carbon Nano tubes on fresh and hardned properties of conventional concrete

Mudasir, P.; Naqash, Javed Ahmed

doi:10.1016/j.matpr.2021.05.645

Cited by 7 publications

(7 citation statements)

References 23 publications

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“…A decrease in a slump with the addition of nanoparticles is also due to the surface tension property of nanoparticles because water gets clung around nanoparticles resulting decrease in a slump. Similarly, Mudasir and Naqash (2021a, 2021b, 2021c observed a decrease in the slump of multi-walled carbon nanotube reinforced concrete due to agglomeration of multi walled carbon nano tubes.…”

Section: Workabilitymentioning

confidence: 90%

“…From published research, it can be observed commonly used nanoparticles in the concrete matrix are SiO 2 (Lin et al , 2008a, 2008b; Sobolev et al , 2009; Qing et al , 2006) and TiO 2 (Sobolev and Gutiérrez, 2005; Li et al , 2007). While few studies are available on incorporating nano-Fe 2 O 3 (Li et al , 2006), nano alumina (Al 2 O 3 ) (Garboczi and Bentz,1996), carbon nanotubes (Mudasir and Naqash, 2021a, 2021b, 2021c; Peerzada and Naqash, 2021) and nano clay particles (Chang et al , 2007; Kuo et al , 2006)…”

Section: Introductionmentioning

confidence: 99%

“…From published research, it can be observed commonly used nanoparticles in the concrete matrix are SiO 2 (Lin et al, 2008a(Lin et al, , 2008bSobolev et al, 2009;Qing et al, 2006) and TiO 2 (Sobolev and Gutiérrez, 2005;Li et al, 2007). While few studies are available on incorporating nano-Fe 2 O 3 (Li et al, 2006), nano alumina (Al 2 O 3 ) (Garboczi and Bentz,1996), carbon nanotubes (Mudasir and Naqash, 2021a, 2021b, 2021cPeerzada and Naqash, 2021) and nano clay particles (Chang et al, 2007;Kuo et al, 2006) As aluminum oxide is the constitute phase of OPC which is responsible for the formation of tricalcium aluminate (C 3 A) and tetra calcium alumino ferrite (C 4 AF). Tricalcium Aluminate (C 3 A) generates heat during the early days of hydration and hardening in high amounts.…”

Section: Introductionmentioning

confidence: 99%

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Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete

Mudasir

Khan²,

Bilal³

et al. 2022

WJE

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Purpose The purpose of this paper is to study the effect of nano alumina (Al2O3) on the properties of fresh concrete, hardened concrete and microstructure of concrete incorporated with high range water reducer (HRWR). This initiative was taken to improve characteristic properties of concrete using nano alumina because nano alumina can be easily be manufactured from a scrap of industrial aluminum products, so its incorporation in concrete will not only reduce industrial aluminum waste but will also change the morphology of concrete at the microstructural level. Design/methodology/approach To accomplish the objectives of the research, four different concrete mixes with the constant water–cement ratio (W/C) and superplasticizer (SP) content 0.4 and 0.6% by weight of cement, respectively, were prepared, whereas nano alumina content was altered by 0.3% and 0.4% by weight of cement. Fresh property of concrete was analyzed by using slump cone test, whereas hardened properties of concrete were analyzed through compression test and flexural strength test. The interaction of nano alumina with concrete composite was evaluated using an X-ray diffraction test. Findings It was observed that 0.6% superplasticizer by weight of cement increased workability by 22% but with the addition of 0.3%, nano alumina by weight of cement workability decreased by 31%. Compressive strength increased by 4.88% with the addition of 0.6% superplasticizer but with the addition of 0.3% nano alumina by weight of cement compressive strength increased by 18.60%. Also, flexural strength increased by 1.21% with the addition of 0.6% superplasticizer by weight of cement but with the addition of 0.3% nano alumina by weight of cement flexural strength increased by 8.76%. With the addition of superplasticizer, alite and belite phases remained un-hydrated but with the addition of nano alumina alite phase was hydrated while belite phase was un-hydrated. The size of belite crystals in mixes having nano alumina was less than that of mix having 0.6% superplasticizer. Also with the addition of nano alumina, a calcium aluminum silicate phase was formed which was responsible for the increment of strength in mixes having nano alumina. Originality/value Incorporation nano alumina (Al2O3) in concrete will not only reduce industrial aluminum waste but will also reduce CO2 emission. Nano alumina (Al2O3) also changes morphology of concrete at micro structural level.

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Section: Workabilitymentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete

Mudasir

Khan²,

Bilal³

et al. 2022

WJE

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“…Mudasir and Naqas [9] examined the physical and mechanical properties of concrete that contained 0.5% Carbon Nano Tubes (CNTs) by weight of cement. These CNTs were incorporated into concrete mixes with different water cement ratios, namely 0.40, 0.45, 0.48, and 0.50.…”

Section: Introductionmentioning

confidence: 99%

Preparation of thermally stable cementitious mortar incorporating multiwall carbon Nano- tube and carbon waste from aluminium production industry

Khater,

Gharieb

2024

Preprint

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The main purpose of this paper is to carry out a comparative investigation into the performance of multiwall carbon nanotube (MWCNT) and carbon wastes that are derived from the production of aluminum in the creation of thermally stable cementitious mortar. In Egypt, carbon waste is produced as a by-product of the aluminum industry and it is identified by its nano-scale dimensions. The cement mortar is produced by using a combination of blended cement (CEMIII) and sand that passes through a 1 mm sieve, with different ratios of both MWCNT and C-waste ranging from 0.1% to 0.7%. The addition of MWCNT and c-waste leads to an enhancement in compressive strength values up to 0.1%, resulting in values of approximately 70MPa and 75 MPa at 90 days, respectively. The findings validate the superior physical and mechanical properties of c-waste as compared to MWCNT, in addition to its lower production cost in comparison to precious MWCNT. The cement mortar demonstrates increased resistance to high temperatures when exposed to firing temperatures up to 700 degrees, achieving measurements of about 60 MPa and 63 MPa for MWCNT and carbon waste, respectively. The results also confirm the higher thermal stability of carbon waste when compared to MWCNT, despite both exceeding the limits specified for thermal resistance in mortar, which is 60 MPa.

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“…Other nanomaterials that can be employed to reinforce concrete are graphite [20] and carbon nanotubes [21]. Moreover, the nanocomponents can act as a filler, leading to a reduction in the porosities of concrete and an increase in the packing density [22].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Combined Polymorphs Anatase-Rutile Nano-Modified Lightweight Concrete on Photocatalytic Reduction of NOx, Self-Cleaning Performance, and Antimicrobial Properties

Kujawa

Didyk-Mucha²,

Olewnik-Kruszkowska

et al. 2023

Buildings

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Anatase, one of the polymorphs of titanium dioxide (TiO2), has become the most widely used semiconductor for photocatalytic materials due to its chemical and physical properties. However, researchers have been studying the use of alternative materials (e.g., ZnO, N-doped, and C-doped TiO2) to improve the photocatalytic activity of cementitious materials. In this paper, we propose a modification of lightweight concrete by introducing mixed phases of titanium dioxide—anatase and rutile—to enhance its photocatalytic performance. The efficiency of NOx degradation of nano TiO2-modified concrete, its self-cleaning performance, and its antimicrobial properties were studied. The photocatalytic activity of lightweight concrete without TiO2 and concrete with the addition of anatase, rutile, and anatase-rutile was compared. The results show that modifying the samples by adding a mixture of anatase and rutile (2.5 wt % A + 2.5 wt % R) significantly improved the photocatalytic performance of lightweight concrete.

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Impact of carbon Nano tubes on fresh and hardned properties of conventional concrete

Cited by 7 publications

References 23 publications

Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete

Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete

Preparation of thermally stable cementitious mortar incorporating multiwall carbon Nano- tube and carbon waste from aluminium production industry

Synergistic Effect of Combined Polymorphs Anatase-Rutile Nano-Modified Lightweight Concrete on Photocatalytic Reduction of NOx, Self-Cleaning Performance, and Antimicrobial Properties

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Impact of carbon Nano tubes on fresh and hardned properties of conventional concrete

Cited by 7 publications

References 23 publications

Aptness of nano alumina (Al2O3) with high range water reducer-incorporated concrete

Aptness of nano alumina (Al2O3) with high range water reducer-incorporated concrete

Preparation of thermally stable cementitious mortar incorporating multiwall carbon Nano- tube and carbon waste from aluminium production industry

Synergistic Effect of Combined Polymorphs Anatase-Rutile Nano-Modified Lightweight Concrete on Photocatalytic Reduction of NOx, Self-Cleaning Performance, and Antimicrobial Properties

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Product

Resources

About

Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete

Aptness of nano alumina (Al₂O₃) with high range water reducer-incorporated concrete