抄録
Carbonation resistance of concrete is closely related to its air permeability. Rapid air permeability testing method proposed by the authors was applied to predict the carbonation resistance of concrete in structures. Concrete specimens with variable water-cement ratio, type of cement and age of drying were prepared and subjected to the rapid air permeation speed test and accelerated carbonation test. The relationship between two test results was obtained. Next, the carbonation depths corresponding to the design service life class of JASS5 was estimated according to the Draft recommendations and comments for the highly durable concrete structure design and constructions. Finally, rapid air permeation speed corresponding to the JASS5 design service life classes were obtained using the relationships between accelerated carbonation depth and rapid air permeation speed by cement type.
