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Prof. Hanaa Ibrahim Abdel Hamid El Sayad :: Publications:

Permeability and pore volume of carbonated concrete”, ACI Materials Journal, Vol. 96, 1999, pp. 378-381.
Authors: P. A. Claisse, H. I. El Sayad, and I. G. Shaaban
Year: 1999
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: International
Paper Link:
Full paper Hanaa Ibrahim Abdel Hamid El Sayad_Paper 11.pdf
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Carbonation is widely recognized as a significant cause of corrosion of reinforcement in concrete. However, in addition to the depassivation of the steel, it has several other effects. This paper investigates the effect of carbonation on the permeability and pore structure of concrete. One of the most significant consequences of this effect is that it causes standard tests for durability to give misleading results. Suitable test procedures for the measurement of porosity and permeability were chosen form a review of the available techniques. Samples of two concrete mixes with different water-cement ratios were each prepared with both wet and dry curing and exposed in a carbonation chamber for up to 140 days. The results show that carbonation reduces the permeability and porosity and indicate the extent of this reduction. The reduction was greatest in poor quality concrete. When compared with the other effects of carbonation, the reduction in permeability is seen to be similar to the reduction in electrical resistivity because this can also lead to misleading test results.

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