DOI QR코드

DOI QR Code

Evaluation of Anti-Stripping Performance in Asphalt Concrete using Byproduct Ash produced from Circulating Fluidized Bed Boiler

보일러 부산 애쉬를 이용한 아스팔트 콘크리트의 박리저항성 평가

  • 김유석 (경기대학교 대학원 토목공학과) ;
  • 김낙석 (경기대학교 토목공학과)
  • Received : 2017.12.21
  • Accepted : 2018.01.22
  • Published : 2018.04.01

Abstract

Pot-holes are steadily increasing due to abnormal climate such as heavy rainfall and frequent snowfall. Pot-hole related to traffic accidents cause injuries, car damage and distress of road facilities. To reduce pot-holes, the use of an anti-stripping agent is mandatorily recommended to asphalt concrete mixture. Hydrated lime is commonly used as anti-stripping agent due to the convenience and economics. Byproduct ash from circulating fluidized bed boiler was reviewed as an anti stripping agent. According to the test results, the byproduct ash is satisfied with TSR specification using 1% to 3% by weight of the asphalt mixture. The byproduct ash was examined under various condition changes of aggregate and asphalt concrete mixture considering quality movement. According to the results, using the byproduct ash was measured average 0.87 of TSR and coverage rates of 60% after rolling bottle test. Test results also revealed that the byproduct ash showed stable performance. Using the byproduct ash to decrease pot-hole in asphalt concrete pavement is suitable for demonstrating stable performance as anti-stripping agent.

최근 집중호우, 잦은 강설 등 이상기후에 따라 아스팔트 콘크리트 포장의 포트홀 발생이 급증하고 있다. 포트홀은 교통사고와 직결되는 파손형태로 인명피해, 차량 및 도로시설물 파손 등의 피해가 증가하는 추세이다. 이에 따라 포트홀 발생을 저감하기 위해 아스팔트 콘크리트 혼합물에 박리방지제를 의무적으로 사용하도록 권장하고 있는 실정이다. 국내에서는 비교적 사용이 편리하고 경제적인 소석회를 박리방지제로 주로 사용하고 있다. 본 연구에서는 순환 유동층 보일러 가동시 발생하는 보일러 부산 애쉬를 박리방지제로 활용하는 연구를 수행하였다. 연구결과 보일러 부산 애쉬를 아스팔트 콘크리트 혼합물 중량의 1~3% 혼합한 결과 TSR 기준을 모두 만족하였다. 품질변동을 감안하여 골재, 혼합물 등 다양한 조건의 보일러 부산 애쉬를 검토하였으며 실험결과 TSR 평균 0.87, 동적수침 후 피복률 60% 이상으로 안정적으로 품질기준을 만족하는 것으로 나타났다. 이에 따라 보일러 부산 애쉬는 안정적으로 박리방지제 성능을 발현하여 아스팔트 콘크리트 포장의 포트홀 발생 저감에 매우 효과적일 것으로 판단된다.

Keywords

References

  1. AASHTO T 283, Standard Method of Test for Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage.
  2. Choi, S. H., Kim, W. J., Le, V. P., Lee, H. J. and Hwang, S. D. (2014). "Moisture damage evaluation of asphalt mixtures depending on the types of anti-stripping agent." International Journal of Highway Engineering, Vol. 16, No. 4, pp. 45-50 (in Korean). https://doi.org/10.7855/IJHE.2014.16.4.045
  3. Chun, S. H., Rhee, S. K., Kim, N. H. and Hwang, S. D. (2005). "Effect of hydrated-lime on moisture susceptibility characteristics of asphalt mixtures." (in Korean).
  4. Hicks, R. G. and Todd, V. S. (2003). "Life cycle costs for lime in hot mix asphtal." Report & Software for National Lime Association.
  5. Im, J. S. (2016). "Over the past 5 years, occured 360,000 pot-hole in national pavement." The Press Release in the National Assembly (in Korean).
  6. Jo, M. H., Yun, S. U. and Lee, Y. H. (2013). "Asphalt concrete pavement pothole: repair method." Journal of Korea Society of Road Engineers, Vol. 15, No. 2, pp. 43-51 (in Korean).
  7. Kim, K. N., Kim, S. H. and Kim, N. S. (2017). "A study on algorithm for materials take-off using pothole detection system." Journal of the Korean Society of Civil Engineers, Vol. 37, No. 3, pp. 603-610 (in Korean). https://doi.org/10.12652/KSCE.2017.37.3.0603
  8. KS F 2374, Standard Test Method for Wheel Tracking of Asphalt Mixtures (in Korean).
  9. KS F 2382, Standard Test Method for Indirect Tension of Asphalt Mixtures (in Korean).
  10. KS F 3501, Filler For Hot Mix Asphalt Pavement (in Korean).
  11. Lee, S. Y., Mun, S. H. and Kim, Y. R. (2011). "Fatigue and rutting performance of lime-modified hot-mix asphalt mixtures." Construction and Building Materials, 25, pp. 4202-4209.
  12. Little, D. N. and Jones IV, D. R. (2003). "Chemical and mechanical mechanisms of moisture damage in hot mix asphalt pavements." National Seminar in Moisture Sensitivity, San Diego, California.
  13. Ministry of Land, Infrastructure and Transport (MLIT) (2014), "Development of Quality Management System to Pavement Construction to Prepare for Climate Change (4th year)", Final Report of 4th Years (in Korean).
  14. Ministry of Land, Infrastructure and Transport (MLIT) (2017). Asphalt mixture construction guidelines (in Korean).
  15. Mun, K. J. and Kwon, S. J. (2014). "Construction materials utilizing byproduct from circulating fluidized bed boiler." Journal of the Korean Recycled Construction Resources Institute, Vol. 9, No. 3. pp. 8-12 (in Korean).
  16. National Assembly (2013). Accident related to pothole has increased five times over the four years seven month, The Press Release in the National Assembly (in Korean).
  17. Watson, D. (1992). Status report on the use of hydrated lime in asphaltic concrete mixtures in georgia, Georgia DOT, Materials and Research.