Influence of different surfactants on hydrated lime pastes modified with CNTs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00367783" target="_blank" >RIV/68407700:21110/23:00367783 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0162199" target="_blank" >https://doi.org/10.1063/5.0162199</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0162199" target="_blank" >10.1063/5.0162199</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of different surfactants on hydrated lime pastes modified with CNTs

Popis výsledku v původním jazyce

Nanomaterials such as graphene or carbon nanotubes (CNTs) have the potential to improve mechanical behavior of lime-based renders and plasters, and make those materials suitable for restoration works in terms of strength. However, the performance of nanoparticles is conditioned by their dispersion within the material matrix. This research focuses on the ways to ensure homogenous distribution of nanomaterials; the methods of dispersion are tested on hydrated lime pastes containing CNTs. In the experimental work, mixtures were prepared using physical dispersion in the form of a two-step homogenization method combined with the use of surfactants, namely Tween 80 and Triton X 100, and superplasticizer Dynamon SX. For the hardened samples, basic physical and mechanical properties were determined. the results showed only a slight improvement of mechanical properties caused by the use of CNTs and even a decrease in those properties in case of the mixtures containing surfactants, as the surfactants produced foam while mixing and consequently caused an increase in porosity. This indicates that in case of highly porous materials such as hydrated lime pastes, the negative effect of growing porosity on material strength outweighs the reinforcing effect of CNTs. Therefore, used nanomaterial dispersion methods should avoid producing additional pores.

Název v anglickém jazyce

Influence of different surfactants on hydrated lime pastes modified with CNTs

Popis výsledku anglicky

Nanomaterials such as graphene or carbon nanotubes (CNTs) have the potential to improve mechanical behavior of lime-based renders and plasters, and make those materials suitable for restoration works in terms of strength. However, the performance of nanoparticles is conditioned by their dispersion within the material matrix. This research focuses on the ways to ensure homogenous distribution of nanomaterials; the methods of dispersion are tested on hydrated lime pastes containing CNTs. In the experimental work, mixtures were prepared using physical dispersion in the form of a two-step homogenization method combined with the use of surfactants, namely Tween 80 and Triton X 100, and superplasticizer Dynamon SX. For the hardened samples, basic physical and mechanical properties were determined. the results showed only a slight improvement of mechanical properties caused by the use of CNTs and even a decrease in those properties in case of the mixtures containing surfactants, as the surfactants produced foam while mixing and consequently caused an increase in porosity. This indicates that in case of highly porous materials such as hydrated lime pastes, the negative effect of growing porosity on material strength outweighs the reinforcing effect of CNTs. Therefore, used nanomaterial dispersion methods should avoid producing additional pores.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA20-01866S" target="_blank" >GA20-01866S: Vysocehodnotné kompozity obsahující vrstevnaté nanomateriály</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Conference of Numerical Analysis and Applied Mathematics ICNAAM 2021

ISBN

978-0-7354-4589-5

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

4

Strana od-do

"130006-1"-"130006-4"

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Rodos

Datum konání akce

20. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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