Title: Effect of Curing Conditions on the Carbonation of Concrete with Fly Ash and the Corrosion of Reinforcement in Long-Term Tests

Author(s): Shigeyoshi Nagataki, Hiroyuki Ohga, and Eun Kyum Kim

Publication: Symposium Paper

Volume: 91

Issue:

Appears on pages(s): 521-540

Keywords: carbonation; corrosion; curing; exposure; fly ash; mix proportioning; pozzolans; reinforced concrete; reinforcing steels.

DOI: 10.14359/10086

Date: 2/1/1986

Abstract:
This paper reports the long term results of experiments carried out since 1969 to investigate the carbonation phenomena in concrete with and without fly ash. They were carried out for different mix proportions by varying cement factor, replacement ratio of fly ash and water-cement ratio. The specimens were cured indoors and outdoors after water curing for periods of 1, 7, 28 and 91 days. It was found that the carbonation and the corrosion is considerably affected by mix proportions, initial curing period in water and exposure conditions. Depths of the carbonation of concrete cured indoors increase with age, short initial curing period in water and high water-cement ratio. Corrosion of reinforcing bar embeded occurred due to the carbonation.