Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)
Online ISSN : 2185-6567
ISSN-L : 2185-6567
Paper (In Japanese)
STUDY ON THE RELATIONSHIP BETWEEN MASS TRANSFER RESISTANCE AND APPEARANCE ALTERATION OF ACTUAL STRUCTURES BY AIR PERMEABILITY TECHNIQUE
Ryota HAYASHIHirotaka HAZEHARAMasashi SOEDASakura FUKAMI
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2020 Volume 76 Issue 4 Pages 332-348

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Abstract

 The purpose of this study was to clarify the relationship between air permeability and mass transfer resistance of concrete subjected to various deterioration factors. This was done by analysing cores collected from actual structures and the relationship between air permeability and the progress of deterioration was studied.

 Experiments were carried out and it was observed that the air permeability coefficient of the deteriorated part was clearly larger than the healthy part. It was also estimated that the higher the air permeability and the larger the oxygen supply amount, the sooner the deterioration such as peeling occured. Rebar corrosion progressed rapidly due to the effects of deterioration factors like the CO2, chloride ions and water ingress. Therefore, in the environmental range of the actual structure studied this time, it was suggested that the damage could be quantitatively assessed by measuring the air permeability coefficient using core at any given location.

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© 2020 by Japan Society of Civil Engineers
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