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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

Olsson, Nilla LU ; Abdul Wahid, Fatmawati; Nilsson, Lars Olof LU ; Thiel, Charlotte; Wong, Hong S. and Baroghel-Bouny, Véronique (2018) In Cement and Concrete Research 111. p.94-103
Abstract

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... (More)

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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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chloride (D), Durability (C), Long-term performance (C), Microstructure (B), Transport properties (C)
in
Cement and Concrete Research
volume
111
pages
94 - 103
publisher
Elsevier
external identifiers
  • scopus:85048864432
ISSN
0008-8846
DOI
10.1016/j.cemconres.2018.06.006
language
English
LU publication?
yes
id
76b060a3-aa1f-4e5c-84d4-b2b3f8633e97
date added to LUP
2018-07-04 14:09:25
date last changed
2019-01-14 17:36:21
@article{76b060a3-aa1f-4e5c-84d4-b2b3f8633e97,
  abstract     = {<p>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 <sup>1</sup>H 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.</p>},
  author       = {Olsson, Nilla and Abdul Wahid, Fatmawati and Nilsson, Lars Olof and Thiel, Charlotte and Wong, Hong S. and Baroghel-Bouny, Véronique},
  issn         = {0008-8846},
  keyword      = {Chloride (D),Durability (C),Long-term performance (C),Microstructure (B),Transport properties (C)},
  language     = {eng},
  month        = {01},
  pages        = {94--103},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {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},
  url          = {http://dx.doi.org/10.1016/j.cemconres.2018.06.006},
  volume       = {111},
  year         = {2018},
}