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Modelling the carbonation of cement pastes under a CO 2 pressure gradient considering both diffusive and convective transport

Quoc Tri Phung, Norbert Maes, Diederik Jacques, Geert De Schutter UGent, Guang Ye UGent and Janez Perko (2016) CONSTRUCTION AND BUILDING MATERIALS. 114. p.333-351
abstract
Underground concrete structures in radioactive waste disposal have the potential to be subjected to a high hydrostatic pressure and the surrounding environment may contain a high dissolved CO2 concentration. Therefore, a combination of diffusion and advection should be taken into account when one considers the carbonation mechanism. This study aims at developing a model to predict the evolution of the microstructure and transport properties of hardened cement pastes due to carbonation under accelerated conditions in which a pressure gradient of pure CO2 is applied. The current model is improved from the preliminary model in terms of extension to limestone cement paste and accounting for the transport of moisture. The proposed model is based on a macroscopic mass balance for CO2 and moisture in both gaseous and aqueous phases. A simplified solid -liquid equilibrium curve is used to relate the Ca content in aqueous and solid phases. Besides the prediction of the changes in porosity, diffusivity, permeability, and saturation degree, the model also enables prediction of the carbonation degree, portlandite content, and CO2 uptake. Verification with experimental results from accelerated carbonation tests shows a good agreement.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Modelling, Carbonation, Transport properties, Microstructure, Cement paste, Limestone filler, CALCIUM-SILICATE-HYDRATE, ACCELERATED CARBONATION, PREDICTING CARBONATION, CONCRETE CARBONATION, WATER PERMEABILITY, UNSATURATED SOILS, MINERAL REACTIONS, GAS-PERMEABILITY, MICROSTRUCTURE, SIMULATION
journal title
CONSTRUCTION AND BUILDING MATERIALS
volume
114
pages
333 - 351
publisher
Elsevier BV
Web of Science type
Article
Web of Science id
000376696600037
JCR category
ENGINEERING, CIVIL
JCR impact factor
3.169 (2016)
JCR rank
11/125 (2016)
JCR quartile
1 (2016)
ISSN
0950-0618
1879-0526
DOI
10.1016/j.conbuildmat.2016.03.191
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8524474
handle
http://hdl.handle.net/1854/LU-8524474
date created
2017-06-21 07:47:21
date last changed
2017-06-23 08:39:05
@article{8524474,
  abstract     = {Underground concrete structures in radioactive waste disposal have the potential to be subjected to a high hydrostatic pressure and the surrounding environment may contain a high dissolved CO2 concentration. Therefore, a combination of diffusion and advection should be taken into account when one considers the carbonation mechanism. This study aims at developing a model to predict the evolution of the microstructure and transport properties of hardened cement pastes due to carbonation under accelerated conditions in which a pressure gradient of pure CO2 is applied. The current model is improved from the preliminary model in terms of extension to limestone cement paste and accounting for the transport of moisture. The proposed model is based on a macroscopic mass balance for CO2 and moisture in both gaseous and aqueous phases. A simplified solid -liquid equilibrium curve is used to relate the Ca content in aqueous and solid phases. Besides the prediction of the changes in porosity, diffusivity, permeability, and saturation degree, the model also enables prediction of the carbonation degree, portlandite content, and CO2 uptake. Verification with experimental results from accelerated carbonation tests shows a good agreement.},
  author       = {Phung, Quoc Tri and Maes, Norbert and Jacques, Diederik and De Schutter, Geert and Ye, Guang and Perko, Janez},
  issn         = {0950-0618},
  journal      = {CONSTRUCTION AND BUILDING MATERIALS},
  keyword      = {Modelling,Carbonation,Transport properties,Microstructure,Cement paste,Limestone filler,CALCIUM-SILICATE-HYDRATE,ACCELERATED CARBONATION,PREDICTING CARBONATION,CONCRETE CARBONATION,WATER PERMEABILITY,UNSATURATED SOILS,MINERAL REACTIONS,GAS-PERMEABILITY,MICROSTRUCTURE,SIMULATION},
  language     = {eng},
  pages        = {333--351},
  publisher    = {Elsevier BV},
  title        = {Modelling the carbonation of cement pastes under a CO 2  pressure gradient considering both diffusive and convective transport},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2016.03.191},
  volume       = {114},
  year         = {2016},
}

Chicago
Phung, Quoc Tri, Norbert Maes, Diederik Jacques, Geert De Schutter, Guang Ye, and Janez Perko. 2016. “Modelling the Carbonation of Cement Pastes Under a CO 2  Pressure Gradient Considering Both Diffusive and Convective Transport.” Construction and Building Materials 114: 333–351.
APA
Phung, Q. T., Maes, N., Jacques, D., De Schutter, G., Ye, G., & Perko, J. (2016). Modelling the carbonation of cement pastes under a CO 2  pressure gradient considering both diffusive and convective transport. CONSTRUCTION AND BUILDING MATERIALS, 114, 333–351.
Vancouver
1.
Phung QT, Maes N, Jacques D, De Schutter G, Ye G, Perko J. Modelling the carbonation of cement pastes under a CO 2  pressure gradient considering both diffusive and convective transport. CONSTRUCTION AND BUILDING MATERIALS. Elsevier BV; 2016;114:333–51.
MLA
Phung, Quoc Tri, Norbert Maes, Diederik Jacques, et al. “Modelling the Carbonation of Cement Pastes Under a CO 2  Pressure Gradient Considering Both Diffusive and Convective Transport.” CONSTRUCTION AND BUILDING MATERIALS 114 (2016): 333–351. Print.