Wyznaczanie współczynników dyfuzji chlorków w materiałach cementowych – Przegląd metod eksperymentalnych i modelowania: Część I – Metody dyfuzyjne

Szyszkiewicz, K.; Jasielec, J. J.; Królikowska, A.; Filipek, R.

Artykuł - szczegóły

Tytuł artykułu

Wyznaczanie współczynników dyfuzji chlorków w materiałach cementowych – Przegląd metod eksperymentalnych i modelowania: Część I – Metody dyfuzyjne

Autorzy

Szyszkiewicz K. , Jasielec J. J. , Królikowska A. , Filipek R.

Wybrane pełne teksty z tego czasopisma

http://www.cementwapnobeton.pl/

Identyfikatory

Warianty tytułu

Determination of Chloride Diffusion Coefficient in Cement-Based Materials – A Review of Experimental and Modeling Methods: Part I – Diffusion Methods

Języki publikacji

PL EN

Abstrakty

Korozja stalowych elementów zbrojenia w betonowych konstrukcjach jest poważnym problemem dotyczącym trwałości i bezpieczeństwa. Jednym z najbardziej agresywnych chemicznych składników powodujących taką korozję są jony chlorkowe działające poprzez ogólny mechanizm depasywacji powierzchni zbrojenia. Jony chlorkowe mogą dyfundować w roztworze w porach betonu docierając do zbrojenia, tak więc możliwość oszacowania współczynnika dyfuzji chlorków w betonie jest niezwykle ważna. Przedstawiona praca rozpoczyna serię trzech publikacji, których celem jest przegląd metod doświadczalnych wyznaczania współczynników dyfuzji jonów chlorkowych i teoretycznych modeli opisujących procesy transportu tych jonów w betonie. W szczególności, część 1 serii zawiera ogólne wprowadzenie do tematyki i omawia bardziej szczegółowo metody dyfuzyjne, część 2 koncentruje się przede wszystkim na metodach elektro-migracyjnych, a część 3 opisuje metody oparte na impedancji elektrochemicznej, które nie są obecnie tak powszechnie wykorzystywane do wyznaczania współczynników dyfuzji chlorków, jak wspomniane już dwie pozostałe grupy.

The corrosion of steel reinfordcement (rebars) in concrete structures is a severe durability and safety problem. One of the most aggressive chemical species which induces such corrosion are the chloride ions via the general mechanism of depassivation of the rebar surface. Chloride ions can diffuse through the solution of pore system in concrete to reach the rebar, thus the assessment of the diffusion coefficient of chloride in concrete is of paramount importance. This paper starts a series of three papers which are meant to provide an overview of experimental methods and theoretical models of chloride diffusion in cement based materials. Specifically, Part 1 includes general introduction to the subject and covers pure diffusion methods, Part 2 deals with electro-migration methods, and finally Part 3 describes methods based on the electrochemical impedance which are not so common for chloride diffusion coefficient determination as the previous two groups.

Słowa kluczowe

materiał na bazie cementu zbrojenie stalowe korozja zbrojenia jon chlorkowy transport jonów współczynnik dyfuzji modelowanie metoda dyfuzyjna

cement based material steel reinforcement reinforcement corrosion chloride ion ion transport diffusion coefficient modelling diffusion method

Wydawca

Fundacja Cement, Wapno, Beton

Czasopismo

Cement Wapno Beton

Rocznik

2017

Tom

R. 22/84, nr 1

Strony

52--67

Opis fizyczny

Bibliogr. 70 poz., il.

Twórcy

autor

Szyszkiewicz K.

Wydział Inżynierii Materiałowej i Ceramiki, Akademia Górniczo-Hutnicza, Kraków

autor

Jasielec J. J.

Wydział Inżynierii Materiałowej i Ceramiki, Akademia Górniczo-Hutnicza, Kraków

autor

Królikowska A.

Instytut Badawczy Dróg i Mostów, Warszawa

autor

Filipek R.

rof@agh.edu.pl

Wydział Inżynierii Materiałowej i Ceramiki, Akademia Górniczo-Hutnicza, Kraków

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-d45c242e-434b-451c-ba51-446f579ca5a9