|
Title |
Chloride Ion Penetration Resistance of Slag-replaced Concrete and Cementless Slag Concrete by Marine Environmental Exposure
|
|
Authors |
이보경(Bo-Kyeong Lee) ; 김규용(Gyu-Yong Kim) ; 김경태(Gyeong-Tae Kim) ; 신경수(Kyoung-Su Shin) ; 남정수(Jeong-Soo Nam) |
|
DOI |
https://doi.org/10.4334/JKCI.2017.29.3.299 |
|
Keywords |
해양환경 ; 슬래그 치환 콘크리트 ; 슬래그 콘크리트 ; 염화물 이온 침투 ; 고정염화물 marine environment ; slag-replaced concrete ; cementless slag concrete ; chloride ion penetration ; bound chloride |
|
Abstract |
In this research, it was examined chloride ion penetration resistance of slag-replaced concrete and cementless slag concrete considering marine environmental exposure conditions of splash zone, tidal zone and immersion zone. In the design strength of grade 24 MPa, the specimens were tested to determine their compressive strength, scanning electron microscopy images and chloride migration coefficient. Further, chloride ion penetration depth and carbonation depth of specimens exposed to marine environment were measured. Experimental results confirm that chloride migration coefficient of specimens tended to decrease with increasing the replacement ratio of ground granulated blast-furnace slag in accelerated laboratory test. In addition, the specimens exposed to the tidal zone were found to be the greatest chloride ion penetration depth compared to splash zone and immersion zone. On the other hand, the chloride ion penetration depth of the specimens exposed to splash zone tended to increase with increasing the replacement ratio of ground granulated blast-furnace slag in contrast with the results for the tidal zone and immersion zone.
|