International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
권호 표지
DOI QR코드

DOI QR Code

Fundamental Study of Mix Proportions of High-Flow Cement-Based Mortar for Gravel-Fill Used in Restoration of Collapsed Roads

도로유실 복구를 위한 골재 충전 고흐름도 모르타르의 기초 배합 연구

  • 조현명 (강원대학교 토목건설공학과) ;
  • 전상표 (강원대학교 토목건설공학과) ;
  • 김승원 (강원대학교 토목공학과) ;
  • 윤경구 (강원대학교 토목공학과) ;
  • 박철우 (강원대학교 사회기반시스템공학과)
  • Received : 2015.01.21
  • Accepted : 2015.02.04
  • Published : 2015.04.15
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSES: As a part of our research into repair techniques for roads that have collapsed as a result of a natural disaster, this study set out to find the optimum mix proportion for gravels to be used to restore a damaged area. METHODS: This study considered flow and strength-development characteristics. The experimental variables were the W/C ratio, the usage of the admixture, the types of cement, and the quantity of fine aggregate over three different experimental stages. The compressive strength was measured at 12 hours, one day, three days, and seven days. RESULTS : The flow varied with the amount of fine aggregate and the use of a high-range water-reducing (HRWR) admixture. The compressive strength also varied with respect to the type of cement and the W/C ratios. The strength satisfied the expected requirement of 21 MPa after one day, provided the mix proportion was appropriate. CONCLUSIONS: A gravel-filling high-flow cement-based mortar exhibited strength and consistency with a W/C ratio in the range of 0.40 to 0.45, assuming the use of HRWR at 0.5 to 0.7% and a fine aggregate/cement ratio of 1.0 to 1.5.

Keywords

References

  1. A. Smith (1991), "A cementitious backfill that flows like a liquid, supports like a solid, and self-levels without tamping or compacting(Controlled low strength material)", The Aberdeen Group, Publication # C910389.
  2. B. W. Ramme and T. R. Naik (1997), "Controlled Low-Strength Materials(CLSM) State-of-the-Art New Innovations", Supplementary Proceedings of Third CANMET/ACI International Symposium in Concrete Technology, Report # CBU-1996-13.
  3. Cho, Hyun Myung., Kim, Seung Won., Jeon, Sang Pyo., Shin, Sang Min., Suman Uprety, and Park, Cheol Woo (2014), "Comparison of Setting Properties and Compressive Strength of Cement Paste for Emergency Restoration of Collapsed Road and Slope", 2014 Korean Recycled Construction Resource Institute Conference, KOREC, pp. 31-36.
  4. Kim, Jong Baek., Jung, Eun Hye., Kwon, In Pyo., Park, Chan Hoon and Jeon, Yong Hee (2012), "Strength Development and Durability Properties of Concrete using Early Strength Type Cement", 2012 Korea Concrete Institute Conference, KCI, pp. 267-268.
  5. Kim, Seung Won., Cho, Hyun Myung., Ju, Min Kwan., Oh, Ji Hyeon and Park, Cheol Woo (2013), "Damage Cases of Road and Surface of Slope due to Heavy Rainfall", 2013 Korean Recycled Construction Resource Institute Conference, KOREC, pp. 148-151.
  6. The National Emergency Management Agency (2013), "2013 Yearbook of Disasters(2013 재해연보)", Recovery Support Division in the National Emergency Management Agency, Publication # 11-1660000-000032-10, pp. 5-84.
  7. T. R. Naik, B. W. Ramme, and H. J. Kolbeck (1991), "Controlled Low-strength Material (CLSM) Produced with High-Lime Fly Ash", Shanghai 1991 Ash Utilization Conference, Electric Power Research Institute Publication Gs-7388, V.3, pp. 110-1 through 110-11.

Cited by

  1. Emergency and Permanent Repair Technology for Damaged Road Bases and Slopes using Gravel-Netting Concrete vol.20, pp.2, 2018, https://doi.org/10.7855/IJHE.2018.20.2.009