Model Uncertainty in Diffusion Coefficient for Chloride Ingress into Concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F21%3A00350412" target="_blank" >RIV/68407700:21610/21:00350412 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.prostr.2021.03.023" target="_blank" >https://doi.org/10.1016/j.prostr.2021.03.023</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2021.03.023" target="_blank" >10.1016/j.prostr.2021.03.023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Model Uncertainty in Diffusion Coefficient for Chloride Ingress into Concrete

Popis výsledku v původním jazyce

The diffusion coefficient for the chloride ingress into concrete is a key parameter describing the resistance against chloride penetration into the concrete. Consequently, it is an important aspect of the durability of reinforced concrete structures endangered by chloride-induced corrosion. The diffusion coefficient may be used for the direct assessment of the concrete quality with respect to chloride ingress and with respect to the numerical analysis of the durability of reinforced concrete structures. To estimate the diffusion coefficient, the computation based on the Second Fick's Law model and approximation of chloride profile from destructive penetration tests is usually utilized. Semi-destructive or non-destructive electrochemical tests provide estimates of the diffusion coefficient. The study reveals that (a) the resistivity readings provide a higher estimate for diffusion coefficient in comparison to short-time field exposures that seem to be associated with large uncertainty for exposure periods shorter than one year; (b) electrical resistivity measurements show significantly lower variation compared to the estimates based on chloride profiles.

Název v anglickém jazyce

Model Uncertainty in Diffusion Coefficient for Chloride Ingress into Concrete

Popis výsledku anglicky

The diffusion coefficient for the chloride ingress into concrete is a key parameter describing the resistance against chloride penetration into the concrete. Consequently, it is an important aspect of the durability of reinforced concrete structures endangered by chloride-induced corrosion. The diffusion coefficient may be used for the direct assessment of the concrete quality with respect to chloride ingress and with respect to the numerical analysis of the durability of reinforced concrete structures. To estimate the diffusion coefficient, the computation based on the Second Fick's Law model and approximation of chloride profile from destructive penetration tests is usually utilized. Semi-destructive or non-destructive electrochemical tests provide estimates of the diffusion coefficient. The study reveals that (a) the resistivity readings provide a higher estimate for diffusion coefficient in comparison to short-time field exposures that seem to be associated with large uncertainty for exposure periods shorter than one year; (b) electrical resistivity measurements show significantly lower variation compared to the estimates based on chloride profiles.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-01781S" target="_blank" >GA20-01781S: Modelování nejistot při hodnocení spolehlivosti betonových konstrukcí</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

4th International Conference on Structural Integrity and Durability. Fatigue and Fracture – Theory and Applications

ISBN

978-1-7138-3148-8

ISSN

2452-3216

e-ISSN

—

Počet stran výsledku

7

Strana od-do

147-153

Název nakladatele

Elsevier BV

Místo vydání

Linz

Místo konání akce

Dubrovnik

Datum konání akce

15. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000681323700025