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Title |
Experimental Study on Vibration Reduction Characteristics of Polymer Concrete
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Authors |
김정진(Jeong-Jin Kim) ; 심학보(Hak-Bo Shim) |
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DOI |
https://doi.org/10.11112/jksmi.2019.23.7.58 |
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Keywords |
폴리머 콘크리트; 에폭시; 동적 강성; 손실률 Polymer concrete; Epoxy; Dynamic stiffness; Loss factor |
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Abstract |
Polymer concrete is expected to be widely used as a building material because it has a shorter hardening time and excellent compression, tensile, bending, bond strength, frictional resistance and abrasion loss compared to general concrete. The polymer concrete has excellent vibration damping performance and research on the use of various reinforcing materials is being conducted. However, in order to completely replace the general concrete and the general anti-vibration reinforcement, such polymer concrete requires an overall review of vibration reduction performance considering physical properties, dynamic properties, productivity and field applicability. In this study, the physical and dynamic properties of polymer concrete by epoxy mixing ratio were compared with those of general concrete. It was appeared that compression, tensile, bending and bond strengths of polymer concrete by epoxy mixing were significantly higher than those of general concrete. Especially, the tensile strength was more than 4 ~ 6.5 times. Based on the basic physical properties of polymer concrete, the damping ratio, which is a dynamic characteristic according to the epoxy mixing ratio, was derived through analytical models and experiments. As a result, the dynamic stiffness of polymer concrete was 20% higher than that of general concrete and the loss rate was about 3 times higher.
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