Impact of oxidized carbon nanotubes on the mechanical, thermal, and hygric properties of Portland cement- and magnesium oxychloride cement-based mortars: A route to advanced building composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43931781" target="_blank" >RIV/60461373:22310/25:43931781 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/25:00383811

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214509525007004#ack0005" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214509525007004#ack0005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cscm.2025.e04902" target="_blank" >10.1016/j.cscm.2025.e04902</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of oxidized carbon nanotubes on the mechanical, thermal, and hygric properties of Portland cement- and magnesium oxychloride cement-based mortars: A route to advanced building composites

Popis výsledku v původním jazyce

Carbon nanotubes (CNTs) have gained attention as nano-reinforcement for cementitious materials due to their exceptional mechanical, thermal, and self-sensing properties. While extensively studied in Portland cement (PC) composites, their application in magnesium oxychloride cement (MOC) remains underexplored. However, challenges such as CNTs agglomeration and MOC&apos;s moisture susceptibility limit their effectiveness. This study investigates the impact of oxidized multi-walled carbon nanotubes (CNTox) on the mechanical strength, durability, and water resistance of MOC, with PC composites included for comparison. Two sets of PC- and MOC-based samples were prepared and analyzed in detail, focusing on elemental composition, phase composition, fracture surface microstructure, mechanical properties, thermal, and hygric properties. The results indicate that low CNTox concentrations enhance mechanical strength and retard water ingress. In MOC composites containing 0.1 wt% of CNTox, an 8.4 % increase in compressive strength, a 14.0 % enhancement in flexural strength, and a 0.5 % increase in Young&apos;s modulus were recorded. In PC-based composites, the addition of CNTox led to an improvement in flexural strength by 10.6–20.0 %, while the maximum compressive strength increased by up to 50 % in the composite with 0.05 wt% of CNTox. Thermal conductivity and heat storage increased in all composites containing CNTox. Furthermore, the moisture resistance of CNTox-reinforced MOC composites improved by approximately 1.9–21.4 % compared to the control mix. The results highlight the potential of CNTox as an effective nanoadditive for enhancing the properties of cement-based construction materials. © 2025 The Authors

Název v anglickém jazyce

Impact of oxidized carbon nanotubes on the mechanical, thermal, and hygric properties of Portland cement- and magnesium oxychloride cement-based mortars: A route to advanced building composites

Popis výsledku anglicky

Carbon nanotubes (CNTs) have gained attention as nano-reinforcement for cementitious materials due to their exceptional mechanical, thermal, and self-sensing properties. While extensively studied in Portland cement (PC) composites, their application in magnesium oxychloride cement (MOC) remains underexplored. However, challenges such as CNTs agglomeration and MOC&apos;s moisture susceptibility limit their effectiveness. This study investigates the impact of oxidized multi-walled carbon nanotubes (CNTox) on the mechanical strength, durability, and water resistance of MOC, with PC composites included for comparison. Two sets of PC- and MOC-based samples were prepared and analyzed in detail, focusing on elemental composition, phase composition, fracture surface microstructure, mechanical properties, thermal, and hygric properties. The results indicate that low CNTox concentrations enhance mechanical strength and retard water ingress. In MOC composites containing 0.1 wt% of CNTox, an 8.4 % increase in compressive strength, a 14.0 % enhancement in flexural strength, and a 0.5 % increase in Young&apos;s modulus were recorded. In PC-based composites, the addition of CNTox led to an improvement in flexural strength by 10.6–20.0 %, while the maximum compressive strength increased by up to 50 % in the composite with 0.05 wt% of CNTox. Thermal conductivity and heat storage increased in all composites containing CNTox. Furthermore, the moisture resistance of CNTox-reinforced MOC composites improved by approximately 1.9–21.4 % compared to the control mix. The results highlight the potential of CNTox as an effective nanoadditive for enhancing the properties of cement-based construction materials. © 2025 The Authors

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Case Studies in Construction Materials

ISSN

2214-5095

e-ISSN

2214-5095

Svazek periodika

22

Číslo periodika v rámci svazku

červenec

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

nestránkováno

Kód UT WoS článku

001509850100003

EID výsledku v databázi Scopus

2-s2.0-105007712964