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Diffusivity of saturated ordinary Portland cement-based materials : a critical review of experimental and analytical modelling approaches

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Abstract
Abstract This paper provides a comprehensive overview of existing experimental and modelling approaches to determine effective diffusion coefficients of water saturated ordinary Portland cement-based materials. A dataset for diffusivity obtained from different experimental techniques have been presented for cement paste, mortar and concrete. For cement paste at low porosities, diffusivity reported by different authors varies up to a factor of five and electrical resistivity measurements for low capillary porosity are up to one order of magnitude higher compared to other techniques. Experimental data of mortar and concrete reveals predominant influence of increasing tortuosity due to aggregates and limited influence of interface transition zone. Hence, a particular emphasis has been placed on assessing predictability of diffusivity models for cement paste on a larger dataset collected in this paper. It has been observed that all predictive models have similar level of accuracy and fail to predict electrical resistivity data at low capillary porosity as these models are not calibrated using electrical resistivity data.
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Analytical models

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Chicago
Patel, Ravi Ajitbhai, Quoc Tri Phung, Suresh C Seetharam, Janez Perko, Diederik Jacques, Norbert Maes, Geert De Schutter, Guang Ye, and Klaas Van Breugel. 2016. “Diffusivity of Saturated Ordinary Portland Cement-based Materials : a Critical Review of Experimental and Analytical Modelling Approaches .” Cement and Concrete Research 90: 52–72.
APA
Patel, R. A., Tri Phung, Q., C Seetharam, S., Perko, J., Jacques, D., Maes, N., De Schutter, G., et al. (2016). Diffusivity of saturated ordinary Portland cement-based materials : a critical review of experimental and analytical modelling approaches . CEMENT AND CONCRETE RESEARCH , 90, 52–72.
Vancouver
1.
Patel RA, Tri Phung Q, C Seetharam S, Perko J, Jacques D, Maes N, et al. Diffusivity of saturated ordinary Portland cement-based materials : a critical review of experimental and analytical modelling approaches . CEMENT AND CONCRETE RESEARCH . 2016;90:52–72.
MLA
Patel, Ravi Ajitbhai, Quoc Tri Phung, Suresh C Seetharam, et al. “Diffusivity of Saturated Ordinary Portland Cement-based Materials : a Critical Review of Experimental and Analytical Modelling Approaches .” CEMENT AND CONCRETE RESEARCH 90 (2016): 52–72. Print.
@article{8511174,
  abstract     = {Abstract This paper provides a comprehensive overview of existing experimental and modelling approaches to determine effective diffusion coefficients of water saturated ordinary Portland cement-based materials. A dataset for diffusivity obtained from different experimental techniques have been presented for cement paste, mortar and concrete. For cement paste at low porosities, diffusivity reported by different authors varies up to a factor of five and electrical resistivity measurements for low capillary porosity are up to one order of magnitude higher compared to other techniques. Experimental data of mortar and concrete reveals predominant influence of increasing tortuosity due to aggregates and limited influence of interface transition zone. Hence, a particular emphasis has been placed on assessing predictability of diffusivity models for cement paste on a larger dataset collected in this paper. It has been observed that all predictive models have similar level of accuracy and fail to predict electrical resistivity data at low capillary porosity as these models are not calibrated using electrical resistivity data. },
  author       = {Patel, Ravi Ajitbhai and Tri Phung, Quoc and C Seetharam, Suresh and Perko, Janez and Jacques, Diederik and Maes, Norbert and De Schutter, Geert and Ye, Guang and Van Breugel, Klaas},
  isbn         = {0008-8846},
  journal      = {CEMENT AND CONCRETE RESEARCH },
  keyword      = {Analytical models},
  language     = {eng},
  pages        = {52--72},
  title        = {Diffusivity of saturated ordinary Portland cement-based materials : a critical review of experimental and analytical modelling approaches },
  url          = {http://dx.doi.org/10.1016/j.cemconres.2016.09.015},
  volume       = {90},
  year         = {2016},
}

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