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A Study on the Nano Silica-Sol Coating for Improving Performance of Recycled Aggregate

순환골재의 성능향상을 위한 나노실리카졸의 코팅에 관한 연구

  • 김성수 (대진대학교 건설시스템공학과) ;
  • 이정배 (대진대학교 건설시스템공학과) ;
  • 고지수 (철도기술공단) ;
  • 김일곤 (대진대학교 토목환경공학과)
  • Received : 2013.02.20
  • Accepted : 2013.05.06
  • Published : 2013.07.30

Abstract

In this study we propose an effective method, Coating processing methods, which can improve the quality of recycled aggregate relatively easily without new equipment investment and complex treatment process and verify the improved effect using the devised method, Coating processing methods. To attain the research aim we used adequately diluted silicate solution for coating and carried out several property valuation for twelve types of material with different coating method. Also we formed concrete with coated aggregates which showed the best property. In conclusion the aggregates with the method of repeated impregnation in the silicate and drying showed the most excellent quality while other coating methods also resulted in an improvement of aggregate quality but failed to meet the KS Standard. Lastly with the optimal material we could obtain the approved compressive strength from the concrete allowing it to be utilized for road facility of which standard compressive strength of design is under 24MPa.

본 논문은 기존 순환골재 생산공장에서 새로운 설비투자나 복잡한 처리공정을 거치지 않고 비교적 용이하게 순환골재의 품질을 개선할 수 있는 효과적인 코팅처리방법을 도출하고, 도출한 코팅처리방법으로 순환골재를 코팅처리하여 그 품질개선 효과를 확인하였다. 연구목적을 달성하기 위하여 순환골재를 코팅하기 위하여 코팅처리용액중 하나인 실리케이트 용액을 경제성 있게 알맞은 농도로 희석하여 사용하였으며, 골재의 코팅방법을 달리하여 12가지 종류의 코팅골재에 대한 물성평가를 실시하였다. 또한 가장 좋은 물성을 나타낸 코팅골재를 사용하여 콘크리트를 제조하였다. 이상의 실험결과 골재를 코팅처리용액에 함침 및 건조를 반복하였을 때 골재의 품질이 가장 우수하게 나타났고, 다른 코팅방법 또한 물성이 코팅처리 전 골재보다는 향상되는 것으로 나타났으나, KS 기준에는 미치는 못하는 결과를 나타내었다. 또한, 가장 좋은 물성을 나타낸 골재를 가지고 콘크리트를 제조한 결과 설계기준강도를 만족시키는 압축강도가 측정되었으며, 설계기준강도 24MPa 이하의 도로시설물을 축조할 때 활용이 가능할 것으로 판단된다.

Keywords

References

  1. Bairagi, N. K., Vidyadhhara, H. S. and Ravende, K., "Mix Design Procedure for Recycled Aggregate Concrete", Construction & Building Materials, Vol. 4, Issue. 4, 1990, December, pp.188-193. https://doi.org/10.1016/0950-0618(90)90039-4
  2. Forster, S. W., "Recycled Concrete as Aggregate", ACI concrete Int'1, Vol. 8, No. 10, 1986, October, pp.34-40.
  3. Hansen, T. C. and Narud, H., "Recycled Concrete and Silica Fume Make Calcium Silicate Bricks", Cement and Concrete Research, Vol. 13, No. 5, 1983, September, pp.626-630. https://doi.org/10.1016/0008-8846(83)90051-0
  4. Kim, S. S., Lee, J. B., Park, S. H., Ko, J. S., "Compressive Strengths Properties of Concrete with Nano Silica-Sol Coating Recycle Aggregate", Journal of the Korea Institute for Structural Maintenance Inspection, Vol. 12, No. 1, 2012, pp.113-115 (in Korean).
  5. Kim, S. W., Han, D. S., Lee, H. A., Ko, M. Y., Kim, K. H., "Evaluation of Structural Performance of Reinforced Concrete Beams According to Water Absorption of Recycled Coarse Aggregate", Journal of the Korea Institute for Structural Maintenance Inspection, Vol. 16, No. 5, 2012, pp.49-58 (in Korean). https://doi.org/10.11112/jksmi.2012.16.5.049
  6. Kim, S. W., Lee, H. A., Jung, C. K., Kim, K. H., "Experimental Study on Bond Performance of RC Beams According to Absorption of Recycled Coarse Aggregates", Journal of the Korea Institute for Structural Maintenance Inspection, Vol. 14, No. 3, 2010, pp.100-107 (in Korean).
  7. Ministry of Environment, "Construction Waste Recycling Survey Report", 2006, pp.6-15.1 (in Korean).

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  2. Water Absorbtion Controlling Type Surface Treatment Method for Quality Enhancement of Recycled Aggregate vol.15, pp.6, 2015, https://doi.org/10.5345/JKIBC.2015.15.6.561
  3. Mechanical Properties and Predictions of Strength of Concrete Containing Recycled Coarse Aggregates vol.20, pp.2, 2016, https://doi.org/10.11112/jksmi.2016.20.2.049
  4. Effect of the Amount of Attached Mortar of Recycled Aggregates on the Properties of Concrete vol.3, pp.2, 2015, https://doi.org/10.14190/JRCR.2015.3.2.132