Determining the porosity of nanoparticle-modified cementitious materials using electrochemical impedance spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00384741" target="_blank" >RIV/68407700:21110/25:00384741 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43933665

Výsledek na webu

<a href="https://doi.org/10.1007/s10853-025-11225-6" target="_blank" >https://doi.org/10.1007/s10853-025-11225-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10853-025-11225-6" target="_blank" >10.1007/s10853-025-11225-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determining the porosity of nanoparticle-modified cementitious materials using electrochemical impedance spectroscopy

Popis výsledku v původním jazyce

This paper explores the use of electrochemical impedance spectroscopy (EIS) to measure the porosity of ordinary cement pastes, nanoparticle-modified pastes, and mortars. With proper calibration, EIS effectively monitors changes in microstructure and porosity through Nyquist spectrum analysis. Because EIS is easy to use, relatively accurate, non-destructive, and fast, it has proven to be a suitable tool for testing and comparing large sets of samples. In this study, we tested various equivalent circuit models that showed consistent conductive path measurements but used different nomenclatures. Archie’s law accurately predicted porosity when its index was calibrated using a time-dependent logarithmic function. The general effective media (GEM) model also fit EIS resistance data but required multiple calibrations during hydration. Significant porosity changes were observed in both ordinary and nanoparticle-modified samples over 12 months. Nano-SiO2 increased electrical resistance by 65% and decreased porosity by 3.1% in 1-month-old samples. Mortar samples containing aggregates had up to 82% higher resistance and similar porosity trends compared to pastes. In contrast, nano-Al2O3 reduced electrical resistance by 5%, increasing porosity by 1.8%, indicating potential durability concerns.

Název v anglickém jazyce

Determining the porosity of nanoparticle-modified cementitious materials using electrochemical impedance spectroscopy

Popis výsledku anglicky

This paper explores the use of electrochemical impedance spectroscopy (EIS) to measure the porosity of ordinary cement pastes, nanoparticle-modified pastes, and mortars. With proper calibration, EIS effectively monitors changes in microstructure and porosity through Nyquist spectrum analysis. Because EIS is easy to use, relatively accurate, non-destructive, and fast, it has proven to be a suitable tool for testing and comparing large sets of samples. In this study, we tested various equivalent circuit models that showed consistent conductive path measurements but used different nomenclatures. Archie’s law accurately predicted porosity when its index was calibrated using a time-dependent logarithmic function. The general effective media (GEM) model also fit EIS resistance data but required multiple calibrations during hydration. Significant porosity changes were observed in both ordinary and nanoparticle-modified samples over 12 months. Nano-SiO2 increased electrical resistance by 65% and decreased porosity by 3.1% in 1-month-old samples. Mortar samples containing aggregates had up to 82% higher resistance and similar porosity trends compared to pastes. In contrast, nano-Al2O3 reduced electrical resistance by 5%, increasing porosity by 1.8%, indicating potential durability concerns.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA23-05435S" target="_blank" >GA23-05435S: Účinky radiačního působení na nanomechanické vlastnosti cementových kompozitů v proměnných podmínkách prostředí</a><br>

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

Journal of Materials Science

ISSN

0022-2461

e-ISSN

1573-4803

Svazek periodika

60

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

23

Strana od-do

13867-13889

Kód UT WoS článku

001548277300001

EID výsledku v databázi Scopus

2-s2.0-105013176028