|
Title |
A Study on the Carbonation Characteristics of Fly Ash Concrete by Accelerated Carbonation Test
|
|
Keywords |
탄산화 ; 플라이애쉬 ; 탄산화 시험 ; CO2농도 ; 탄산화 속도 계수 carbonation ; fly ash ; carbonation test ; CO2 concentration ; carbonation velocity coefficient |
|
Abstract |
The increase of industrial carbonic dioxide emissions has accelerated the carbonation of reinforced concrete structures, which drops off their durability. Although advanced countries have already taken safety control measures against the carbonation of RC structures, it is still difficult now to accurately predict the actual carbonation depth. Additionally, it requires much time and efforts. Recently, it is possible to get the data more rapidly through accelerated carbonation test with the CO2 concentration of 100%. In this paper, the carbonation test results obtained by two test methods such as the normal carbonation test method and the accelerated carbonation test method, were compared to investigate the carbonation characteristics of fly ash concrete. The accelerated carbonation test on concrete specimens with the pre-curing age of 180 days was also carried out to examine the carbonation characteristics of fly ash concrete at long-term age. Consequently, fly ash concrete at early age was vulnerable to carbonation and however, its carbonation resistance at long-term ages was improved compared with OPC concrete.
|