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%2F61989100%3A27120%2F21%3A10247857" target="_blank" >RIV/61989100:27120/21:10247857 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/21:PU144000

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321621000263" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321621000263</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

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&apos;s Law model and approximation of chloride profile from destructive penetration tests is usually utilised. 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 com-pared to the estimates based on chloride profiles. (C) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2020 Organizers.

Název v anglickém jazyce

Model uncertainty in diffusion coefficient for chloride ingress into concrete

Popis výsledku anglicky

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&apos;s Law model and approximation of chloride profile from destructive penetration tests is usually utilised. 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 com-pared to the estimates based on chloride profiles. (C) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2020 Organizers.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA18-07949S" target="_blank" >GA18-07949S: Pravděpodobnostní modelování trvanlivosti železobetonových konstrukcí s uvážením spolupůsobení karbonatace, chloridů a mechanického zatížení</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

Procedia Structural Integrity. Volume 31

ISBN

—

ISSN

2452-3216

e-ISSN

—

Počet stran výsledku

7

Strana od-do

147-153

Název nakladatele

Elsevier

Místo vydání

Amsterdam

Místo konání akce

Univ Zagreb

Datum konání akce

15. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000681323700025