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Analysis of the fracture surface morphology of concrete by the method of vertical sections

  • Konkol, Janusz (Department of Materials Engineering and Building Technology, Rzeszow University of Technology) ;
  • Prokopski, Grzegorz (Department of Materials Engineering and Building Technology, Rzeszow University of Technology)
  • Received : 2004.03.08
  • Accepted : 2004.09.15
  • Published : 2004.11.25

Abstract

The examinations carried out have confirmed a relationship existing between the character of fracture surfaces and the composition and structure of (basalt and gravel) concretes. For both concretes investigated, a very good correlation was obtained between the profile line development factor, $R_L$, and the fracture surface development factor, $R_S$. With the increase in the $R_L$ parameter, the fracture surface development factor $R_S$ also increased. Agreement between the proposed relationship of $R_S=f(R_L)$ and the proposal given by Coster and Chermant (1983) was obtained. Stereological examinations carried out along with fractographic examinations made it possible to obtain a statistical model for the determination of $R_L$ (or $R_S$) based on the volume of air voids in concrete, $V_{air}$, the specific surface of air pores, $S_V_{air}$ the specific surface of coarse aggregate, $S_{Vagg.}$, and the volume of mortar, $V_m$. An effect of coarse aggregate type on the obtained values of the profile line development factor, $R_L$, as well as on the relationship $R_S=f(R_L)$ was observed. The increment in the fracture surface development factor $R_S$ with increasing $R_L$ parameter was larger in basalt concretes than in gravel concretes, which was a consequence of the level of complexity of fractures formed, resulting chiefly from the shape of coarse aggregate grains.

Keywords

References

  1. Tschegg, E. K., Zikmunda, W., Stanzl-Tschegg, S. E. (1994), "Improvement of new-old concrete bonds in road constructions-procedures and testing method", Proc. 7th Int. Symp. on Concrete Roads, Vienna, 3-5 Oct. 1994, 2/3, 51-56.
  2. Tan D. M., Tschegg, E. K., Rotter H., Kirchner H. O. K. (1995), "Crack at mortar-stone interfaces", Acta Metall. Mater, 43, 3701-3707. https://doi.org/10.1016/0956-7151(95)90153-1
  3. Tschegg, E. K., Elser M., Stanzl-Tschegg, S. E. (1995), "Biaxial fracture tests on concrete development and experience", Cem. Concr. Comp., 7, 57-75.
  4. Wojnar, L. (1990), Quantitative fractography. Basic principles and computer aided research. Scientific Booklets of the Cracow. Univ. of Techn., Mechanical Series, Booklet no. 2, Cracow (in Polish).
  5. Brandt, A.M. and Prokopski, G. (1993), "On the fractal dimension of fracture surfaces of concrete elements", J. Mat. Sci., 28, 4762-4766. https://doi.org/10.1007/BF00414269
  6. Pickens, J. R. and Gurland, J. (1976), "Metallographic characterization of fracture surface profiles on sectioning plans", Proc. 4th Int. Congress for Stereology (Eds: Underwood, de Wit and Moore), Gaithersburg, Maryland (NBS Special Publication 431), 269-283.
  7. Wright, K. and Karlsson, B. (1981), "Topography of non-planar surfaces", Stereol. Jugosl., 3/I, 247−253.
  8. Coster, M. and Chermant, J. L. (1983), "Recent developments in quantitative fractography", Int. Met. Reviews, 28(4), 228−250.
  9. Underwood, E. E. and Banerji, K. (1987), "Quantitative fractography", Metals Handbook. Ninth Edition, 12, Metals Park, Ohio.
  10. Underwood, E. E. (1989), "The current status of modern quantitative fractography. Advances in Fracture Research", Proc ICF7, Houston, Texas, Salama K., Rawin-Chandar K., Taplin D. M. R., Rama-Rao P., Eds., 3392-3411.
  11. Gokhake, A. M. and Underwood, E. E. (1989), "A new parametric roughness equation for quantitative fractography", Acta Stereologica, 8(1), 43-52.
  12. Baddeley, A. J., Gundersen, H. J. G. and Cruz-Orive, L. M. (1986), "Estimation of surface area from vertical sections", J. Microscopy, 142(3), 259-276. https://doi.org/10.1111/j.1365-2818.1986.tb04282.x
  13. Gokhale, A. M. and Underwood, E. E. (1990), "A general method for estimation of fracture surface roughness: Part I. Theoretical aspects", Metallurgical Transactions A, 21A, 1193-1199.
  14. Gokhale, A. M. and Drury, W. J. (1990), "A general method for estimation of fracture surface roughness: Part II. Practical considerations", Metallurgical Transactions A, 21A, 1201-1207.
  15. Czarnecki, L., Garbacz, A. and Kurach, J. (2001), "On the characterization of polymer concrete fracture surface", Cem. Concr. Comp., 23, 399-409.
  16. Stroeven, P. (2000a), "2-D and 3-D concepts for roughness and tortuosity in cementitious composites", Proc. Int. Symp. "Brittle Matrix Composites 6", A. M. Brandt, V. C. Li, I. H. Marshall eds., ZTUREK RSI and Woodhead Publ., Warsaw.
  17. Stroeven, P. (2000b), "A stereological approach to roughness of fracture surfaces and tortuosity of transport paths in concrete", Cem. Concr. Comp., 22, 331-341. https://doi.org/10.1016/S0958-9465(00)00018-4
  18. Prokopski, G. and Halbiniak, J. (2000), "Interfacial transition zone in cementitious materials", Cem. Concr. Res., 30, 579-583. https://doi.org/10.1016/S0008-8846(00)00210-6
  19. Prokopski, G. and Langier, B. (2000), "Effect of water/cement ratio and silica fume addition on the fracture toughness of gravel concrete", Cem. Concr. Res., 30, 1427-1433. https://doi.org/10.1016/S0008-8846(00)00332-X
  20. Shah, S. P. (1990), "Determination of fracture parameters (KS Ic and CTODc) of plain concrete using three-point bend tests", RILEM Draft Recommendations, Materials and Structures, Paris, 23, 457-460. https://doi.org/10.1007/BF02472029
  21. Fracture Mechanics Test Methods for Concrete (1991), RILEM Report 89-FMT, edited by S. P. Shah and A. Carpinteri, Chapman and Hall.

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