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Effect of the Maximum Aggregate Size on the Workability and Mechanical Properties of Lightweight Concrete

경량 콘크리트의 유동성 및 역학적특성에 대한 굵은골재 최대크기의 영향

  • Received : 2012.01.30
  • Published : 2012.05.25

Abstract

To provide the basic data for the reasonable lightweight concrete mixture design model, a test with a mixture ratio of 18 was conducted with the maximum coarse aggregate size, water-binder ratio and type of the lightweight concrete as main parameters. The slump and air content were measured from the uncured concrete, and the compression strength by age, air content, tensile strength, modulus of rupture and modulus of elasticity were measured from the cured concrete. The measured kinetic characteristics were compared with the design standard to evaluate the structural safety. The test results showed that the initial slump and air content of the lightweight concrete were higher with a smaller maximum size of the coarse aggregate. The water-binder ratio had a significant effect on the kinetic characteristics of the lightweight concrete, but the maximum size of the coarse aggregate did not. This was because the failure of the lightweight concrete penetrated the aggregate, and the resistance effect of the low-strength aggregate decreased. The test results were properly evaluated according to the ACI 318-11 design standard on the modulus of elasticity of the lightweight concrete.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. 한국콘크리트학회, 국토해양부 제정 콘크리트표준시방, 한국콘크리트학회, 2009. pp.
  2. Zhang, M. H. and Gjørv, O. E., "Mechanical Properties of High-Strength Lightweight Concrete", ACI Materials Journal, 88(3), 1991, pp. 240-247.
  3. Slate, F. O., Nilson, A. H. and Martinez, S., "Mechanical Properties of High-Strength Lightweight Concrete", ACI Journal, 83(4), 1986, pp. 606-613.
  4. 전현규, 홍순조, 서치호, "고유동 경량골재콘크리트의 특성에 관한 실험적 연구", 대한건축학회논문집, 17(4), 2001, pp. 71-78.
  5. Caldarone, M. A. and Burg, R. G., "Development of Very Low Density Structural Lightweight Concrete", High-Performance Structural Lightweight Concrete, SP-218, American Concrete Institute, Detroit, 2004, pp. 177-188.
  6. ACI 211.2-98, Standard Practice for Selection Proportion for Structural Lightweight Concrete (ACI 211.2-98), ACI Committee 211, American Concrete Institute, Detroit, Michigan, 1998.
  7. The European Standard EN 1992-1-1:2004, Eurocode 2 : Design of Concrete Structures, British Standards Institution, 2004. 225 pp.
  8. 한국콘크리트학회, 최신 콘크리트공학, 기문당, 2001, 689 pp.
  9. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary (ACI 318R-11), American Concrete Institute, 2011. 473. pp.
  10. 심재일, 양근혁, "굳지 않은 경량골재 콘크리트의 공기량, 유동성 및 블리딩 특성", 한국콘크리트학회 논문집, 22(4), 2010, pp. 559-566.
  11. ACI 213R-03, Guide for Structural Lightweight-Aggregate Concrete (ACI 213R-03), ACI Committee 213, American Concrete Institute, Detroit, Michigan, 2003.
  12. ACI 209R-92, Prediction of Creep, Shrinkage and Temperature Effects in Concrete Structures. ACI Manual of Concrete Practice, Part 1: Materials and General Properties of Concrete, Detroit. Michigan, 1994.
  13. Comite Euro-International Du Beton, CEB-FIP Model Code 1990, Thomas Telford, 1999, pp.
  14. 심재일, 양근혁, "천연모래 치환율과 경량굵은골재 최대크기에 따른 경량골재 콘크리트의 역학적 특성", 한국콘크리트학회 논문집, 23(5), 2011
  15. 한국표준협회, KS 기준안, 한국공업표준협회, 2006.
  16. Yang, K. H, Cho, A. R., and Song, J. K., "Effect of Water-Binder Ratio on the Mechanical Properties of Alkali-Activated Slag Concrete: Part II", Construction and Building Materials, submitted in 2011.
  17. Neville, A. M., Properties of Concrete, Longman, 1995.
  18. 대한건축학회, 건축공사표준시방서, 기문당, 2006.