Evaluation of the Effect of MWCNT Enhancement on Natural Hydraulic Lime Mortars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00372936" target="_blank" >RIV/68407700:21110/24:00372936 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0197665" target="_blank" >https://doi.org/10.1063/5.0197665</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0197665" target="_blank" >10.1063/5.0197665</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of the Effect of MWCNT Enhancement on Natural Hydraulic Lime Mortars

Popis výsledku v původním jazyce

Carbon-based nanomaterials have attracted the interest of researchers in recent years due to their characteristic properties, which enable their use in a wide variety of industrial and medical applications. In materials science, the most studied nanomaterials are in the form of graphene and carbon nanotubes which are incorporated into coatings, polymers or cement composites. However, the preparation of these nanocomposites is technically challenging. The nanoscale additives are prone to clustering due to van der Waals forces, which prevents homogeneous distribution of nanomaterials in the composite and degrades an interaction with the binder. For this reason, the proper preparation and application technique of nanomaterials is an important factor for their correct application. The aim of this study is to find the most suitable technological procedure for the incorporation of multi-walled carbon nanotubes into hydraulic lime mortar. The chemical agents were used to promote the stability of the nanoadditive/water dispersion. The effectiveness of the chemical agents supporting the stability of dispersion prior to mortar mixing was evaluated by UV light absorption. After selecting the optimum composition of mortars, the effect of the applied nanotubes at different doses was evaluated based on the results of the structural, mechanical and thermal properties testing. For an appropriate dispersion of the nanotubes, it was necessary to disperse them in a surfactant solution in combination with a defoamer to prevent excessive air bubble formation during mixing. The prepared mortars with the embedded nanoadditive achieved a more compact structure with lower porosity and higher compressive strength, which was the highest for the dosage of carbon nanotubes of 0.3 wt. % of binder, i.e. hydraulic lime. The higher dosage of nanoadditive resulted in a drop in mechanical resistance, which was still higher than that of control mortar.

Název v anglickém jazyce

Evaluation of the Effect of MWCNT Enhancement on Natural Hydraulic Lime Mortars

Popis výsledku anglicky

Carbon-based nanomaterials have attracted the interest of researchers in recent years due to their characteristic properties, which enable their use in a wide variety of industrial and medical applications. In materials science, the most studied nanomaterials are in the form of graphene and carbon nanotubes which are incorporated into coatings, polymers or cement composites. However, the preparation of these nanocomposites is technically challenging. The nanoscale additives are prone to clustering due to van der Waals forces, which prevents homogeneous distribution of nanomaterials in the composite and degrades an interaction with the binder. For this reason, the proper preparation and application technique of nanomaterials is an important factor for their correct application. The aim of this study is to find the most suitable technological procedure for the incorporation of multi-walled carbon nanotubes into hydraulic lime mortar. The chemical agents were used to promote the stability of the nanoadditive/water dispersion. The effectiveness of the chemical agents supporting the stability of dispersion prior to mortar mixing was evaluated by UV light absorption. After selecting the optimum composition of mortars, the effect of the applied nanotubes at different doses was evaluated based on the results of the structural, mechanical and thermal properties testing. For an appropriate dispersion of the nanotubes, it was necessary to disperse them in a surfactant solution in combination with a defoamer to prevent excessive air bubble formation during mixing. The prepared mortars with the embedded nanoadditive achieved a more compact structure with lower porosity and higher compressive strength, which was the highest for the dosage of carbon nanotubes of 0.3 wt. % of binder, i.e. hydraulic lime. The higher dosage of nanoadditive resulted in a drop in mechanical resistance, which was still higher than that of control mortar.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-4873-5

ISSN

1551-7616

e-ISSN

1551-7616

Počet stran výsledku

6

Strana od-do

"020015-1"-"020015-6"

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Dalešice

Datum konání akce

3. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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