Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Performance Characteristics of No-Fines Polymer Concrete using Recycled Coarse Aggregate with Binder Contents

결합재의 함량에 따른 순환굵은골재 사용 무세골재 폴리머 콘크리트의 성능 발현 특성

  • Kim, Do-Heon (Department of Construction Engineering, Dongyang University) ;
  • Jung, Hyuk-Sang (Department of Railway Safety and Construction Engineering, Dongyang University) ;
  • Kim, Dong-Hyun (Department of Railway Safety and Construction Engineering, Dongyang University)
  • 김도헌 (동양대학교 건설공학과) ;
  • 정혁상 (동양대학교 철도안전건설공학과) ;
  • 김동현 (동양대학교 철도안전건설공학과)
  • Received : 2021.09.24
  • Accepted : 2021.10.29
  • Published : 2021.12.30
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Abstract

In this study, the properties of no-fines polymer concrete with different polymer binder contents were evaluated. The polymer concrete was formulated using a polymeric binder (unsaturated polyester resin), fly ash, and recycled coarse aggregate (60%) and crushed coarse aggregate (40%). The polymeric binder content (4.0-6.0wt.%) was used as an experimental variable because it dramatically affects both the cost-effectiveness and material properties. The results showed that the density, compressive strength, flexural strength both before and after exposure to freezing and thawing increased as the polymer binder content increased, while the absorption, void ratio, permeable voids, coefficient of permeability, and acid resistance (mass loss by acid attack) decreased as the polymeric binder content increased. In particular, even though the void ratio was 18.4% and the water permeability coefficient was 7.3mm/sec, the compressive strength and flexural strength were as high as 38.0MPa and 10.0MPa, respectively, much more significant than those of previous studies. Other properties such as absorption and acid resistance were also found to be excellent. The results appear to be rooted in the increased adhesion of the binder by adding a cross-linking agent and the surface hydrophobicity of the polymer.

이 연구에서는 폴리머 결합재(불포화 폴리에스터 수지), 플라이 애시, 그리고 순환굵은골재(60%)와 부순굵은골재(40%)를 사용하여 폴리머 결합재 함량의 변화에 따른 무세골재 폴리머 콘크리트의 성질(9개항)에 대하여 연구하였다. 폴리머 결합재 함량(4.0-6.0wt.%)을 실험 변수로 한 이유는 비용측면에서 가장 큰 비중을 차지할 뿐만 아니라 각종 성능에 미치는 영향이 크기 때문이다. 연구결과 밀도, 압축강도, 휨강도, 동결융해 후 휨강도는 폴리머 결합재 함량이 증가함에 따라 증가하였고, 흡수율, 공극률, 연속공극률, 투수계수, 내산성(산에 의한 밀도 감소율)은 폴리머 결합재 함량이 증가함에 따라 감소하였다. 특히 폴리머 결합재 함량 6wt.%에서는 공극률이 18.4%, 투수계수가 7.3mm/sec 임에도 압축강도는 38.0MPa, 휨강도는 10.0MPa로서 기존의 연구결과들에 비해 월등히 높고, 흡수율, 내산성 등 다른 성질들도 우수한 것으로 나타났다. 이러한 결과는 가교제의 첨가에 의해 높아진 결합재의 부착력과 폴리머 결합재가 가진 표면 소수성에 기인하는 것이라고 하겠다.

Keywords

References

  1. Alam, M.A., Naz, S. (2015). Experimental study of the properties of no-fines concrete, International Journal of Informative & Futuristic Research, 2(10), 3687-3694.
  2. Chae, C.U. (2002). Physical properties of porous concrete using admixtures, Journal of the Korea Concrete Institute, 14(2), 257-265 [in Korean]. https://doi.org/10.4334/JKCI.2002.14.2.257
  3. Chandra, S., Ohama, Y. (1994). Polymers in Concrete, CRC Press.
  4. Chindaprasirt, P., Hatanaka, S., Mishima, N., Yuasa, Y., Chareerat, T. (2009). Effects of binder strength and aggregate size on the compressive strength and void ratio of porous concrete, International Journal of Minerals, Metallurgy and Materials, 16(6), 714-719. https://doi.org/10.1016/S1674-4799(10)60018-0
  5. Choi, J.J., Yu, H.J. (2010). Effects of filling materials on the physical properties of permeable polymer concrete, KSCE Journal of Civil and Environmental Engineering Research, 30(2A), 177-184 [in Korean].
  6. Engineering notes. No fines concrete: Properties and uses/Concrete technologe https://www.engineeringenotes.com/concrete-technology/light-weight-concrete/no-fines-concrete-properties-and-uses-concrete-technology/31852.
  7. Ibrahim, A., Mahmoud, E., Yamin, M., Patibandla, V.C. (2014). Experimental study on Portland cement pervious concrete mechanical and hydrological properties, Construction and building materials, 50, 524-529. https://doi.org/10.1016/j.conbuildmat.2013.09.022
  8. Japan Concrete Institute. (1995). Technical Committee Report on Eco-Concrete.
  9. Lee, S.H., Shim, J.W. (2010). Enactment provision of recycled aggregate concrete, Magazine of the Korea Concrete Institute, 22(1), 33-35 [in Korean]. https://doi.org/10.22636/MKCI.2010.22.1.33
  10. Lee, Y., Marcaida, A.K., Ahn, J., Lee, T., Cha, M. (2019). Porosity, permeability, and compressive strength after freezing and thawing of permeable polymer concrete, Journal of the Korean Society of Hazard Mitigation, 19(3), 203-208 [in Korean]. https://doi.org/10.9798/kosham.2019.19.3.203
  11. Li, Z.R., Kim, Y.J. (2017). Analytic review of research trends on recycling of construction wastes: 1995-2016, The Journal of the Korea Contents Association, 17(1), 485-495 [in Korean]. https://doi.org/10.5392/JKCA.2017.17.01.485
  12. Macintosh, R.H., Bolton, J.D., Muir, C.H. (1956). No-Fines Concrete as a Structural Material, Proceedings of the Institution of Civil Engineers, 5(6), 677-694. https://doi.org/10.1680/iicep.1956.11522
  13. Malik, A. (2016). An experimental study on properties of no-fines concrete, Imperial Journal of Interdisciplinary Research(IJIR), 2(10), 2075-2079.
  14. Ministry of Environment, Korea Environment Corporation. (2020). The Current Status of Waste Generation and Disposal Nationwide in 2019 [in Korean].
  15. Moon, H. Y., Kim, S. S., & Jung, H. S. (1998). An experimental study of permeable concrete pavement for application, Magazine of the Korea Concrete Institute, 10(3), 165-173 [in Korean]. https://doi.org/10.22636/MKCI.1998.10.3.165
  16. Mounika, P., Srinivas, K. (2018). Mechanical properties of no-fines concrete for pathways, International Journal of Engineering and Techniques, 4(2), 68-81.
  17. Muthaiyan, U.M., Thirumalai, S. (2017). Studies on the properties of pervious fly ash-cement concrete as a pavement material, Cogent Engineering, 4(1), 1-17.
  18. Neville, A.M. (2011). Properties of Concrete, 5th Edition, Longman, England.
  19. Pio, Y.M., Jo, Y.K., Soh, Y.S. (1988). A study on the physical properties and permeability of permeable polymer concrete, Journal of the Korea Concrete Institute, 10(6), 213-222 [in Korean].
  20. Woo, G.S., Kim, J.H., Lee, S.H., Oh, J.K. (2020). A study on the quality properties when applying recycled aggregate concrete for the construction standard mitigation, Journal of the Korea Institute for Structural Maintenance and Inspection, 24(3), 63-69 [in Korean]. https://doi.org/10.11112/JKSMI.2020.24.3.63