폴리머 콘크리트의 진동저감 특성에 대한 실험적 연구
Experimental Study on Vibration Reduction Characteristics of Polymer Concrete
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
폴리머 콘크리트는 일반 콘크리트에 비해 경화시간이 짧고, 압축, 인장, 휨, 부착강도, 마찰저항성, 마모감량 등이 우수해 건축 재료로써 폭넓은 활용이 기대되는데, 특히, 레진 바인더와 골재만의 결합으로 이루어진 폴리머 콘크리트는 진동 감쇠 성능이 우수하여, 다양한 보강재로의 활용과 관련한 연구가 진행되고 있다. 한편, 이러한 폴리머 콘크리트가 일반 콘크리트 및 일반 방진보강재를 완전히 대체하기 위해서는 물리적 특성, 동적 특성, 생산성 및 현장 적용성 등을 고려한 진동저감 성능에 대한 전반적인 검토가 필요한 실정이다. 본 연구에서는 폴리머 콘크리트의 에폭시 혼입비율별 물리적, 동적 특성을 일반 콘크리트와 비교한 결과, 압축, 인장, 휨, 부착강도가 상당히 우수한 결과를 보였으며, 특히 인장강도는 4~6.5배 이상 큰 차이를 보였다. 폴리머 콘크리트의 기본적인 물리적 특성에 근거하여 폴리머 콘크리트의 일반적인 사용성에 대해 검토함과 동시에, 에폭시 혼입비율에 따른 동적 특성인 감쇠비를 해석 모델과 실험을 통해 도출하여 검토한 결과, 폴리머 콘크리트의 동적 강성은 일반 콘크리트의 동적 강성 보다 20% 높고, 손실률은 약 3배 정도 높은 것으로 나타났다.
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.
참고문헌 (16)
- W. G. Wong, "Dynamic properties impact toughness and abrasiveness of polymer-modified pastes by using nondestructive tests", Cement and Concrete Research, 33(9), pp.1371~1374 (2003)
- F. Cortes, "Comparison between the dynamical properties of polymer concrete and grey cast iron for machine tool applications", Material and Design, 28(5), pp.1461~1466 (2007)
- J. Wongpa, "Compressive strength, modulus of elasticity, and water permeability of inorganic polymer concrete", Material and Design, 31(10), pp.4748~4754 (2007)
- Rajoria, H., "Passive Vibration Damping Enhancement Using Carbon Nanotube-epoxy Reinforced Composites", Composites Science and Technology, 65(14), pp.2079~2093 (2005)
- Wang, J. C., "Influence of Temperature and Pressure on the Dynamic Properties of Rubber-modified Asphalt Concrete", Journal of Materials in Civil Engineering, 18(1), pp.125~131 (2006)
- Jeon, W., "Efficient Damping of Vibration Using and Acoustic Black Hole", Proceedings of the KSNVE 2016annual Spring Conference, pp.202~203 (2016)
- 유승엽, "중량충격원에 따른 콘크리트 바닥판의 차음특성 분석 및 평가에 관한 연구", 한국소음진동공학회논문집, 19(10), pp.1062~1068 (2009), 한국소음진동공학회
- Lee, W. H., "Pilot Experiments of Estimated Proper Ratio of Latex Polymer Concrete for Reducing Floor Impact Sound", Proceedings of the KSNVE Annual Spring Conference, pp.532~533 (2009)
- Cho, H. N., "Flexural Behavior of Damaged Reinforced Concrete Beams repaired wity Epoxy Mortar", Master’s, pp.2000
- Kwon, S. M, "Analysis of Dynamic characteristics of complex polymer concrete according to structure of polymer concrete", Proceedings of the KSNVE 2018 annual Spring Conference, pp.202~ (2018)
- C. Y. Park, "Estimation of loss energy from the measurement returning time of rebound for carbon black-filled natural rubber compounds", Journal of Korean Inst. Chem. Eng, 35, pp.154~ (1997)
- Saliba, J., "Influence of Shrinkage-Reducing Admixture on Plastic and Long-Term Shrinkage", Cement and Concrete Composites, 33(2), pp.209~217 (2011)
- Kobayashi, T, "Low-Temperature Curing of Polymethyl Methacrylate Polymer Concrete", Transportation Research Record, 1003, pp.15~18 (1984), Transportation Research Board
- Ahn, N., "Structureal Test of Precast Polymer Concrete", Journal of Applied Polymer Science, 114(3), pp.1370~1376 (2009)
- Ahmad, S., "Use of Polymer modified mortar in controlling cracks in reinforced concrete beams", Construction and Building Materials, 27, pp.91~96 (2012)
- Joo, M. J., "An Evaluation on the Flexural Strength of Concrete Beams Repaired by Polymer resin", Korea Institute for Structural Maintenance and Inspection, 1(10), pp.107~112 (1997)