When and How Should Chloride Profiles be Calibrated for Paste Fraction?

Fjendbo Simon; De Weerdt Klaartje; Sørensen Henrik Erndahl; Geiker Mette Rica

doi:10.2478/ncr-2021-0021

Nordic Concrete Research (Jul 2022)

When and How Should Chloride Profiles be Calibrated for Paste Fraction?

Fjendbo Simon,
De Weerdt Klaartje,
Sørensen Henrik Erndahl,
Geiker Mette Rica

Affiliations

Fjendbo Simon: Industrial PhD student, NTNU, Department of Structural Engineering, NO-7491Trondheim, Norway, and Danish Technological Institute, DK-2630Taastrup, Denmark
De Weerdt Klaartje: Professor, NTNU, Department of Structural Engineering, NO-7491Trondheim, Norway
Sørensen Henrik Erndahl: Product manager, Danish Technological Institute, DK-2630Taastrup, Denmark
Geiker Mette Rica: Professor, NTNU, Department of Structural Engineering, NO-7491Trondheim, Norway

DOI: https://doi.org/10.2478/ncr-2021-0021
Journal volume & issue: Vol. 66, no. 1
pp. 1 – 18

Abstract

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Due to stochastic and systematic variations in the paste fraction, data for total chloride content are occasionally calibrated using parallelly measured calcium content as a measure of the actual paste fraction − assuming non-calcareous aggregates and no calcium leaching. Data from concrete exposed at the marine Fehmarn Belt Exposure Site questions the latter assumption. In the outer zone experiencing calcium leaching (ten mm after ten years), errors will be introduced by calcium calibration. To account for the wall effect, calcium profiles from cores taken before exposure might be used to correct for the systematically higher paste fraction at cast surfaces.

Published in Nordic Concrete Research

ISSN: 0800-6377 (Print); 2545-2819 (Online)
Publisher: Sciendo
Country of publisher: Poland
LCC subjects: Technology: Building construction
Website: https://sciendo.com/journal/ncr

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