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Title: Characterization of steel corrosion in alkali-activated mortars using advanced techniques Authors: ID Gartner, Nina (Author) ID Hren, Miha (Author) ID Kosec, Tadeja (Author) ID Legat, Andraž (Author) Files: URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S2214509525009635   PDF - Presentation file, download (12,04 MB) MD5: 5A1D38E65F5AEB95AF1E72D83A9A8FAD   PDF - Supplement, download (668,68 KB) MD5: 2CC50935D89163A538525E7C944C6618   This document has even more files. Complete list of files is available below. Language: English Typology: 1.01 - Original Scientific Article Organization: ZAG - Slovenian National Building and Civil Engineering Institute Abstract: Alkali-activated materials have emerged as a promising substitute for ordinary Portland cement (OPC) in various applications. This study explores the use of different monitoring techniques for assessing the long-term corrosion behavior of steel in alkali-activated mortars, which remains relatively understudied. Three types of alkali-activated mortars (AAMs) were prepared, based on fly ash, slag, or metakaolin as the precursor material. The corrosion of embedded steel was investigated under wetting and drying cycles with chloride-containing solution for up to one year. Two unconventional techniques were used to monitor corrosion: coupled multi-electrode array sensors (CMEA) to measure partial currents, and electrical resistance (ER) sensors to track thickness reduction. The ER sensors enabled evaluation of general corrosion rates over time, while CMEA provided insight into corrosion initiation and its spatiotemporal distribution. In addition, the corrosion damage on the embedded steel and sensors was evaluated using X-ray computed microtomography (microCT). Distinct corrosion patterns were observed depending on the precursor material: severe corrosion in metakaolin-based AAMs, localized pitting in slag-based AAMs, and moderate damage in fly ash-based AAMs. The study demonstrates the complementary value of CMEA and ER sensors and highlights the challenges of characterizing the long-term corrosion processes in these alternative binder systems. Keywords: corrosion, alkali‐activated materials, coupled multi-electrode array (CMEA), electrical resistance (ER) sensor, X-ray computed microtomography (microCT), visual analysis Publication status: Published Publication version: Version of Record Publication date: 11.08.2025 Publisher: Elsevier Year of publishing: 2025 Number of pages: str. 1-17 Numbering: Vol. 23, [article no.] e05165 PID: 20.500.12556/DiRROS-23422  UDC: 620.1/.2 ISSN on article: 2214-5095 DOI: 10.1016/j.cscm.2025.e05165  COBISS.SI-ID: 246113283  Copyright: © 2025 The Author(s). Note: Nasl. z nasl. zaslona; Opis vira z dne 20. 8. 2025; Publication date in DiRROS: 27.08.2025 Views: 391 Downloads: 273 Metadata:    Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

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Record is a part of a journal

Title:	Case studies in construction materials
Publisher:	Elevier
ISSN:	2214-5095
COBISS.SI-ID:	520377881

Document is financed by a project

Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P2-0273
Name:	Gradbeni objekti in materiali

Licences

License:	CC BY 4.0, Creative Commons Attribution 4.0 International
Link:	http://creativecommons.org/licenses/by/4.0/
Description:	This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:	Slovenian
Title:	Dataset for the research article “Characterization of steel corrosion in alkali-activated mortars using advanced techniques”
Keywords:	korozija, alkalijsko-aktivirani materiali, mreža sklopljenih elektrod, električni uporovni senzor, rentgenska računalniška mikrotomografija, vizualna analiza

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This document is a collection and includes these documents:

1. Dataset for the research article “Characterization of steel corrosion in alkali-activated mortars using advanced techniques”

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