Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
DOI QR코드

DOI QR Code

Investigation of Aggregate Size Effect on Cracking Behavior in Concrete Fracture Test using Mechanoluminescent Paint

압광 페인트를 이용한 콘크리트 파괴시험시 골재크기가 균열성상에 미치는 영향조사

  • Lee, Chang Joon (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Kim, Wha-Jung (School of Architecture and Civil Engineering, Kyungpook National University) ;
  • Kim, Ji-Sik (Department of Advanced Materials Engineering, Kyungpook National University) ;
  • Jeon, Ki-Yong (School of Architecture and Civil Engineering, Kyungpook National University)
  • 이창준 (경북대학교 건축토목공학부) ;
  • 김화중 (경북대학교 건축토목공학부) ;
  • 김지식 (경북대학교 신소재공학부) ;
  • 전기용 (경북대학교 건축토목공학부)
  • Received : 2012.04.16
  • Accepted : 2012.11.21
  • Published : 2012.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In order to capture the fast crack propagation in an unmanipulated concrete fracture test, we employed mechanoluminascent(ML) material, which emits visible light when stressed, as a crack visualization tool. Three-point bending fracture test setup, a paint type ML material and a high speed camera were used to capture the images of fast moving cracks. The maximum size of coarse aggregates of concrete was used as an experimental parameter. The crack images, loading, and crack mouth opening displacement were successfully recorded as a function of time elapsed. From the test results, several interesting cracking behavior in the unmanipulated fracture test was observed in such that (1) the crack moves fast while the load is slowly decreased after the maximum loading, and (2) the crack in concrete with larger coarse aggregates moves faster than the others.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. J. G. M. Mier, "Fracture Processes of Concrete" CRC Press Inc, Boca Raton, FL., 1997.
  2. S. P. Shah, S. E. Swartz and Ouyang, C., "Fracture Mechanics of Concrete: Applications of Fracture Mechanics to Concrete, Rock and Other Quasi- Brittle Materials" John Wiley & Sons Inc., New York, NY., 1995.
  3. A. K. Maji, C. Ouyang and S. P. Shah, "Fracture Mechanism of Quasi-Brittle Materials Based on Acoustic Emission" J. Eng. Mech., Vol. 5(1), pp. 206-217, 1990.
  4. S. E. Swartz and C. G. Go, "Validity of Compliance Calibration to Cracked Concrete Beams in Bending" Expr. Mech., Vol. 24(2), pp. 129-134, 1984. https://doi.org/10.1007/BF02324995
  5. J. F. Labuz, S. P. Shah and C. H. Dowding, "Experimental Analysis of Crack Propagation in Granite" Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., Vol. 22(2), pp. 85-98, 1985. https://doi.org/10.1016/0148-9062(85)92330-7
  6. R. C. Yu, X. X. Zhang, G. Ruiz, M. Tarifa and M. Camara, "Size of the Fracture Process Zone in High-Strength Concrete at a Wide Range of Loading Rates" Appl. Mech. Mater., Vol. 24(25), pp. 155-160, 2010.
  7. C. N. Xu, T. Watanabe, M. Akiyama and X. G. Zheng, "Direct View of Stress Distribution in Solid by Mechanoluminescence" Appl. Phys. Lett., Vol. 74, pp. 2414-2416, 2007.
  8. C. N. Xu, X. G. Zheng, M. Akiyama, K. Nonaka and T. Watanabe, "Dynamic Visualization of Stress Distribution by Mechanoluminescence Image" Appl. Phys. Lett., Vol. 76, pp. 179-181, 2000. https://doi.org/10.1063/1.125695
  9. K. S. Sohn, S. Y. Seo, Y. N. Kwon and H. D. Park, "Direct Observation of Crack Tip Stress Field Using the Mechanoluminescence of $SrAl_2O_4$: (Eu,Dy,Nd)" J. Am. Ceram. Soc., Vol. 85, pp. 712-714, 2004. https://doi.org/10.1111/j.1151-2916.2002.tb00158.x
  10. J. S. Kim, Y. Kwon, N. Shin and K. Sohn, "Visualization of Fractures in Alumina Ceramics by Mechanoluminescence" Acta. Mater., Vol. 53, pp. 4337-4343, 2005. https://doi.org/10.1016/j.actamat.2005.05.032