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(ReceivedMarch8,2016/RevisedMarch18,2016/AcceptedMarch18,2016)Several researches on high volume fly ash co ncrete have been conducted to investigate its fundamental material properties such as slump, strength and durability and however, research on the structural behavior of bond strength is essential for the applicat ion of this high volume fly ash concrete to structural members because of the necessity of reinforcement. But the exact design code fo r application and researches on the bond behavior of high volume fly ash concrete lack yet. To achieve such a goal, this paper ev aluates experimentally the bond behavior of high volume fly ash concretes by direct pull-out test and compares between the current test results and existing research results. By the test results, it is shown that the bond behavior of high volume fly ash concrete is similar tothat of general concrete. And by the comparison between test and existing research, it is shown that bond stress of high volume fly ash concrete is underestimated, as the embedment length gets longer. : , , , Keywords : High volume, Fly ash, Bond behavior, Direct pull-out test* Corresponding author E-mail: offsuhji@woosuk.ac.kr

Bond Behavior of Concrete According to Replacement Ratio of Fly Ash and Compressive Strength of Concrete