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

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

Abstract

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.

Keywords

gradbeništvo;materiali;dodatni cementni materiali;korozija;faza napredovanja;karbonizacija;kloridi;civil engineering;supplementary cementitious materials;corrosion;propagation stage;carbonation;chlorides;

Data

Language:	English
Year of publishing:	2021
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	691
COBISS:	60814851
ISSN:	0008-8846
Views:	269
Downloads:	54
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	gradbeništvo;materiali;dodatni cementni materiali;korozija;faza napredovanja;karbonizacija;kloridi;
Pages:	str. 1-15
Volume:	ǂLetn. ǂ145
Issue:	106458
Chronology:	jul. 2021
DOI:	10.1016/j.cemconres.2021.106458
ID:	12919704