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Title |
Strength Characteristics of Concrete Subjected to Vertical Continuous Vibration during Initial Curing Period
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Keywords |
초기양생기간 ; 연속진동 ; 수직진동 ; 진동시간 제어 ; 콘크리트 강도 initial curing period ; continuous vibration ; vertical vibration ; vibration time control ; concrete strength |
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Abstract |
In construction site, there are some occasions where concrete under initial curing is being affected by nitration from nearby vibration sources. To study these effects, in this paper, strength characteristics of concrete specimens subjected to continuous vibration up to 12 hours in vertical direction after concrete placement were observed. And through the vibration time control experiment where a number of time combinations consisted of times before and after applying vibration during initial curing period were used as experimental parameters, possibility of concrete strength improvement was investigated. From the experimental results, it could be seen that the concrete strengths were mostly decreased due to the increase of vibration velocity during initial curing period. But fluctuation ratio of concrete strength did not have any close correlations with the vibration times. And results of vibration time control experiment showed that if times before applying vibration sustains at least more than 3 hours, subsequent vibrations after that hours do not affect the concrete strength in any unfavorable ways.
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