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http://dx.doi.org/10.5345/JKIC.2007.7.1.091

The Plastic Cracking Properties of Fly Ash Concrete with Various Curing Conditions  

Nam, Jae-Hyun (대전대학교 건축공학과)
Park, Jong-Hwa (한국수력원자력(주))
Publication Information
Journal of the Korea Institute of Building Construction / v.7, no.1, 2007 , pp. 91-98 More about this Journal
Abstract
In this study, the property and plastic cracking pattern of concrete were compared and analyzed with the replacement ratio of fly ash 0, 5, 10, 15, 20% by cement weight. And curing conditions of concrete were given variously such as indoors(with wind speed as 0, 300, 500m/min), outdoors and chamber. The hydration temperature had a tendency to decrease as the replacement ratio of fly ash increased, and in the case of the wind speed 0m/min, it was showed that the moment that the amount of evaporation of water from surface of reference concrete was more than the volume of bleeding was 90 min since casting concrete. The time that the crack initiated had a tendency to be more quickly as the replacement ratio of fly ash increased. The number, length, width and area of crack in the indoor curing, exposed outdoor curing, enclosed outdoor curing had a tendency to decrease as the replacement ratio of fly ash increased. The crack had a tendency to decrease in sequence of exposed outdoor, enclosed outdoor curing, indoors curing. The outbreak of cracking by the change of temperature and humidity was affected by relative humidity more than temperature and the cracking had a tendency to increase as relative humidity lowered.
Keywords
Plastic Shrinkage Cracking; fly ash; cracking pattern; curing conditions;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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