KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Experimental Study on Mechanical Properties of Fiber-Reinforced Lightweight Soil

섬유혼합 보강 경량토의 역학적 특성에 관한 실험적 연구

Kim, Yun-Tae;Kim, Hong-Joo;Lee, Jong-Sub
김윤태;김홍주;이종섭

  • Published : 20070500

⟨ Previous Next ⟩

Abstract

A lightweight soil is a cement-treated soil and consists of dredged clayey soil, cementing material and air-foam. Fiber-reinforced lightweight soil is a lightweight soil reinforced with waste fishing net or geogrid in order to increase its compressive strength. This paper investigates stress-strain behaviors, strength characteristics and shear wave velocities of both unreinforced and reinforced lightweight soils. Test specimens were fabricated by various mixing conditions including cement content, initial water content, air-foam content and content of fiber (waste fishing net, geogrid) and then several series of unconfined compression tests, direct shear tests and elastic wave tests were performed. The experimental results of lightweight soils indicated that compressive strength of reinforced lightweight soil generally increased by adding waste fishing net or geogrid, but amount of increase in compressive strength was not proportional to content of waste fishing net. These results were also similar to those of direct shear tests. And the results of elastic wave tests indicated that wave velocities of reinforced lightweight soils were constant, irrespective of the waste fishing net content and geogrid layers added.

Keywords

References

  1. 김승도, 전종갑, 유경선(2001) 폐어망류의 주성분이 PE, PP, NY의 열분해 기작에 대한 연구, 한국폐기물학회지, 한국폐기물학회, 제18권, 제4호, pp. 410-418
  2. 김윤태, 김홍주(2006a) 폐어망을 이용한 보강 경량토의 압축거동 특성. 한국지반공학회 논문집, 한국지반공학회, 제22권, 제11호, pp. 25-35
  3. 김윤태, 권용규, 김홍주(2006b) 지오그리드 혼합 보강 경량토의 압축강도특성 연구. 한국지반공학회 논문집, 한국지반공학회, 제22권, 제7호, pp. 37-44
  4. 해양수산부 (2001), 해양수산 Fact Book
  5. Consoli, N.C., Casagrande, M.D.T., and Coop, M.R. (2005) Effect of fiber reinforcement on the isotropic compression behavior of a sand. Journal of Geotechnical and Geoenvironmental Engineering, Vol. 131, No. 11, pp. 1434-1436 https://doi.org/10.1061/(ASCE)1090-0241(2005)131:11(1434)
  6. Gray, B.D., A.M. ASCE and Talal Al-Refeai (1986) Behavior of fabric-versus fiber-reinforced sand. Journal of Geotechnical Engineering, Vol. 112, No. 8, pp. 804-820 https://doi.org/10.1061/(ASCE)0733-9410(1986)112:8(804)
  7. Markou, I. and Droudakis, A. (2005) Evaluation of sand-geotextile interaction by triaxial compression and direct shear testing. The 11th International Conference of IACMAG
  8. Nataraj, M.S., Addula, H.R., and Mcmanis, K.L. (1996) Strength and Deformation Characteristics of Fiber Reinforced Soils. Environmental Technology, Proceedings of 3rd Iinternational Symposium, pp. 826-831
  9. Prabakar, J.R. and Sridhar, S. (2002) Effect of random inclusion of sisal fibre on strength behaviour of soil. Construction and Building Materials, Vol. 16, pp. 123-131 https://doi.org/10.1016/S0950-0618(02)00008-9
  10. Tang, Y.X., Tsuchida, T., Shirai, A, Ogata, H., and Shiozaki, K. (1996) Triaxial compression characteristics of super geo-material cured underwater. Proceedings of 31st Conference On Geotechnical Engineering, pp. 2493-2494
  11. Wood, M. (1998) Soil behaviour and critical state soil mechanics, pp. 229-234