TY - GEN
T1 - Evaluation of carbonation progress of existing concrete structure based on air permeability of concrete cover - A case study in Japan
AU - Imamoto, Kei-ichi
AU - Tanaka, A.
PY - 2012/10/17
Y1 - 2012/10/17
N2 - This paper deals with the on-site air-permeability of concrete cover and its relation to carbonation progress of existing RC structures in Japan. The air permeability of concretes and carbonation progresses were measured with 4 buildings and 11 concrete specimens which ages ranged from 12 to 45 years. The carbonation velocity (A) based on the square root theory increases with the increase of air permeability coefficient (kT). Although the relationship between A and kT for all building and concrete specimens has quite large scatter, the relationships between them for individual buildings were comparatively good. This might provide a good perspective for indicate that evaluation of carbonation progress based on the kT should be performed at each building, i.e. environmental condition.
AB - This paper deals with the on-site air-permeability of concrete cover and its relation to carbonation progress of existing RC structures in Japan. The air permeability of concretes and carbonation progresses were measured with 4 buildings and 11 concrete specimens which ages ranged from 12 to 45 years. The carbonation velocity (A) based on the square root theory increases with the increase of air permeability coefficient (kT). Although the relationship between A and kT for all building and concrete specimens has quite large scatter, the relationships between them for individual buildings were comparatively good. This might provide a good perspective for indicate that evaluation of carbonation progress based on the kT should be performed at each building, i.e. environmental condition.
UR - http://www.scopus.com/inward/record.url?scp=84867355136&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84867355136
SN - 9780415899529
T3 - Concrete Repair, Rehabilitation and Retrofitting III - Proceedings of the 3rd International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR 2012
SP - 309
EP - 314
BT - Concrete Repair, Rehabilitation and Retrofitting III - Proceedings of the 3rd International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR 2012
T2 - 3rd International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR 2012
Y2 - 3 September 2012 through 5 September 2012
ER -