ǂThe ǂcorrosion properties of steel in pore solutions obtained from alkali‐activated mortars

Nina Gartner (Author), Tadeja Kosec Mikić (Author), Stéphane Poyet (Author), Andraž Legat (Author)

Abstract

Alkali‐activated materials (AAMs) are considered a promising alternative to materials made from ordinary Portland cement (OPC). Other than considering the durability of the material itself, the use of AAMs for reinforced concrete elements also raises the question of steel corrosion processes in these materials, which are still relatively unknown. Three different alkali‐activated mortars were prepared for this study, based on either fly ash, slag, or metakaolin. Pore solutions were then extracted from each mortar and chemically analyzed. Electrochemical techniques were used to study the corrosion of steel in synthetic pore solutions containing varying concentrations of chlorides. In parallel, the same corrosion tests were performed in a generic pore solution representing OPC mortar. It was shown that the chemical composition differed in each pore solution tested, thus affecting the corrosion properties of the steel. The addition of chloride also had a varying effect on the corrosion properties of the steel in each type of pore solution tested. This study provided a basic overview of the corrosion behavior and mechanisms of the various AAM environments in comparison to that of OPC.

Keywords

alkali-aktivated materials;corrosion;electrochemical corrosion techniques;extracted pore solution;

Data

Language:	English
Year of publishing:	2023
Typology:	1.01 - Original Scientific Article
Organization:	ZAG - Slovenian National Building and Civil Engineering Institute
Publisher:	Wiley VCH
UDC:	544.5/.6
COBISS:	151389443
ISSN:	1521-4176
Views:	11
Downloads:	2
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	alkalijsko aktivirani materiali;korozija;elektrokemijske korozijske tehnike;iztisnjena porna voda;
Embargo end date (OpenAIRE):	2024-04-28
Source comment:	Nasl. z nasl. zaslona; Opis vira z dne 9. 5. 2023;
Pages:	str. 1009-1021
Volume:	ǂVol. ǂ74
Issue:	ǂiss. ǂ7
Chronology:	Jul. 2023
DOI:	10.1002/maco.202313729
ID:	21128642