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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

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

Article name in the collection

AIP Conference Proceedings

ISBN

978-0-7354-4873-5

ISSN

1551-7616

e-ISSN

1551-7616

Number of pages

6

Pages from-to

"020015-1"-"020015-6"

Publisher name

AIP Publishing

Place of publication

Melville, NY

Event location

Dalešice

Event date

Oct 3, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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