Effects of blended cements and carbonation on chloride-induced corrosion propagation

Hren, Miha (author), Bokan-Bosiljkov, Violeta (author), Legat, Andraž (author)

Supplementary cementitious materials are known to refine the pore structure of concrete and accelerate the carbonation progress. The combination of the two processes can have both beneficial and disadvantageous effects on corrosion, especially when chlorides are also involved. In this study the corrosion properties of multiple blended cements were evaluated in carbonated and non%carbonated states, with chlorides introduced through cyclic ponding. The examination involved monitoring the propagation phase, determining the microstructural properties of cements, and assessing the final corrosion damage. The results showed that the steel in the blended cements initially had a relatively high corrosion activity, which later decreased compared to the OPC. This stabilisation was presumably due to the beneficial changes to the pore structure. Carbonation had a significant impact on the corrosion, with carbonated mortars revealing shallower damage over a larger surface area. This effect was more pronounced for blended cements that exhibited greater susceptibility to carbonation.

• Language: English
• Keywords: civil engineering, supplementary cementitious materials, corrosion, propagation stage, carbonation, chlorides
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: Str. 1-15
• Numbering: Letn. 145, 106458
• PID: 20.500.12556/RUL-127152
• UDC: 691
• ISSN on article: 0008-8846
• DOI: 10.1016/j.cemconres.2021.106458
• COBISS.SI-ID: 60814851
• Publication date in RUL: 20.05.2021

Record is a part of a journal

• Title: Cement and concrete research
• Shortened title: Cem. concr. res.
• Publisher: Pergamon Press.
• ISSN: 0008-8846
• COBISS.SI-ID: 5819399

Secondary language

• Language: Slovenian
• Keywords: gradbeništvo, materiali, dodatni cementni materiali, korozija, faza napredovanja, karbonizacija, kloridi

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0273
• Name: Gradbeni objekti in materiali