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Wick action in mature mortars with binary cements containing slag or silica fume - The relation between chloride and moisture transport properties under non-saturated conditions

  • Moisture and ionic transport under non-saturated condition is an important, but poorly understood transport phenomena particularly for mature systems containing supplementary cementitious materials. This paper investigates the moisture and chloride profiles of 3-year old mortars containing Portland cement (OPC), slag and silica fume (SF) after long-term (30–48 months) wick action exposure in 1.09 M NaCl solution. Moisture profiles were measured with ¹H NMR relaxometry and chloride profiles with microXRF. The measured profiles were discussed in relation to moisture dependent material properties such as chloride diffusion coefficients, moisture diffusion coefficients, and desorption isotherms. Results show that the combination of different cementitious materials, e.g. the cementitious binder, is the key factor affecting chloride penetration depth. The cementitious binder also strongly affects chloride diffusion coefficient, moisture diffusion coefficient and chloride binding properties, which are all important parameters for the prediction of chloride ingress.

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Metadaten
Author:Nilla Olsson, Fatmawati Abdul Wahid, Lars-Olof Nilsson, Charlotte ThielORCiD, Hong S. Wong, Véronique Baroghel-Bouny
DOI:https://doi.org/10.1016/j.cemconres.2018.06.006
Parent Title (English):Cement and Concrete Research
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2018
Release Date:2022/06/27
Tag:Chloride; Durability; Long-Term Performance; Microstructure; Transport properties
Volume:111
Issue:September
First Page:94
Last Page:103
Institutes:Fakultät Bauingenieurwesen
Fakultät Bauingenieurwesen / Labor für Baustoffe
Begutachtungsstatus:peer-reviewed
Publication:Externe Publikationen
research focus:Gebäude und Infrastruktur
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG