Advances in concrete construction

  • 제19권6호
  • /
  • Pages.393-402
  • /
  • 2025
  • /
  • 2287-5301(pISSN)
  • /
  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Enhancing concrete testing : Impact of modified specimen geometry on compressive and tensile strength

  • Sadeq Hajar (Mohammed First University Oujda, Faculty of Science Oujda, Laboratory of Materials, Wave, Energy and Environment (LaMOn2E), MEGCE team ESTO) ;
  • Amar Najib (Mohammed First University Oujda, Faculty of Science Oujda, Laboratory of Materials, Wave, Energy and Environment (LaMOn2E), MEGCE team ESTO) ;
  • Nasser Abdelkader (Mohammed First University Oujda, Faculty of Science Oujda, Laboratory of Materials, Wave, Energy and Environment (LaMOn2E), MEGCE team ESTO) ;
  • Kerkour El Miad Abdelhamid (LABNORVIDA laboratory)
  • 투고 : 2024.05.28
  • 심사 : 2025.05.21
  • 발행 : 2025.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

Frequently used in mechanical testing of concrete, cubic and cylindrical shapes are the subject of a number of studies questioning their influence on the material's strength. The aim of this study was to introduce a modified geometry to reduce the volume of test specimens and guarantee improved performance in strength tests, by investigating the effect of shape. Experimental results showed that the compressive strength of the modified shape was superior to that of standard shapes. However, due to its configuration, tensile strength was slightly improved. A regression analysis was carried out based on Bazant's formula for the effect of size. The results obtained indicate that this formula can be used to explain the proposed shape effect. In this respect, an empirical formula was proposed relating the compressive strength of the proposed specimens to the strength of standard specimens. A verification of the specimen damage model was also carried out in accordance with standards. Finally, a comparative analysis of the proposed geometry with existing literature was carried out.

키워드

과제정보

The authors appreciate the financial assistance provided by the National Center for Scientific and Technical Research (CNRST) (Grant number 17UMP2021). Additionally, we appreciate the LABNORVIDA laboratory's support during the experimental phase of this study.

참고문헌

  1. Bažant, Z.P. (1984), "Size effect in blunt fracture : concrete, rock, metal", J. Eng. Mech., 110(4), 518-535. https://doi.org/10.1061/(ASCE)0733-9399(1984)110:4(518)
  2. Bažant, Z.P. (2000), "Size effect", Int. J. Solids Struct., 37(1-2), 69-80. https://doi.org/10.1016/S0020-7683(99)00077-3
  3. Chassib, S.M., Zemam, S.K. and Madhi, M.J. (2020), "New approach of concrete tensile strength test", Case Stud. Constr. Mater., 12, p. e00347. https://doi.org/10.1016/j.cscm.2020.e00347
  4. Chockalingam, T., Vijayaprabha, C. and Raj, J.L. (2023), "Experimental study on size of aggregates, size and shape of specimens on strength characteristics of pervious concrete", Constr. Build. Mater., 385, p. 131320. https://doi.org/10.1016/j.conbuildmat.2023.131320
  5. Del Viso, J.R., Carmona, J.R. and Ruiz, G. (2008), "Shape and size effects on the compressive strength of high-strength concrete", Cement Concrete Res., 38(3), 386-395. https://doi.org/10.1016/j.cemconres.2007.09.020
  6. Dehestani, M., Nikbin, I.M. and Asadollahi, S. (2014), "Effects of specimen shape and size on the compressive strength of selfconsolidating concrete (SCC)", Constr. Build. Mater., 66, 685-691. https://doi.org/10.1016/j.conbuildmat.2014.06.008
  7. Dehghanpour, H. and Yilmaz, K. (2020), "Investigation of specimen size, geometry and temperature effects on resistivity of electrically conductive concretes", Constr. Build. Mater., 250, p. 118864. https://doi.org/10.1016/j.conbuildmat.2020.118864
  8. European Standard, N.F. (2001a), Testing Hardened Concrete-Part 1 : Shape. Dimensions and other requirements for specimens and molds (EN 12390-1 : 2001), Editions AFNOR, Paris.
  9. European Standard, N.F. (2001b), Testing for hardened concretePart 2 : Preparation and conservation of specimens for strength testing (EN 12390-2 : 2001). Editions AFNOR, Paris.
  10. European Standard, N.F. (2001c), Testing Hardened Concrete-Part 6 : Tensile Splitting Strength of Test Specimens (EN 12390-6 : 2001). Editions AFNOR, Paris.
  11. European Standard, N.F. (2003), Testing Hardened Concrete-Part 3 : compressive strength of the specimens (EN 12390-3 : 2003). Editions AFNOR, Paris.
  12. Fládr, J. and Bílý, P. (2018), "Specimen size effect on compressive and flexural strength of high-strength fibre-reinforced concrete containing coarse aggregate", Compos. Part B: Eng., 138, 77-86. https://doi.org/10.1016/j.compositesb.2017.11.032
  13. Jin, L., Yu, W., Du, X. and Yang, W. (2019), "Dynamic size effect of concrete under tension : A numerical study", Int. J. Impact Eng., 132, p. 103318. https://doi.org/10.1016/j.ijimpeng.2019.103318
  14. Kim, J.K. and Yi, S.T. (2002), "Application of size effect to compressive strength of concrete members", Sadhana, 27, 467-484. https://doi.org/10.1007/BF02706995
  15. Khalilpour, S. and Dehestani, M. (2022), "Enhanced specimen size and shape effect models for high-strength fibre-reinforced concrete", Proceedings of the Institution of Civil EngineersStructures and Buildings, 175(4), 303-318. https://doi.org/10.1680/jstbu.19.00086
  16. Li, M., Hao, H., Shi, Y. and Hao, Y. (2018), "Specimen shape and size effects on the concrete compressive strength under static and dynamic tests", Constr. Build. Mater., 161, 84-93. https://doi.org/10.1016/j.conbuildmat.2017.11.069
  17. Mansur, M.A. and Islam, M.M. (2002), "Interpretation of concrete strength for nonstandard specimens", J. Mater. Civil Eng., 14(2), 151-155. https://doi.org/10.1061/(ASCE)0899-1561(2002)14:2(151)
  18. Maryamh, K., Hauch, K., Redenbach, C. and Schnell, J. (2022), "Influence of specimen size on the fibre geometry and tensile strength of ultra‐high‐performance fibre‐reinforced concrete", Structural Concrete, 23(2), 1239-1252. https://doi.org/10.1002/suco.202000753
  19. Moroccan standard (2008a), Testing Hardened Concrete - Shape, dimensions and other requirements for specimens and moulds (NM 10.1.067 : 2008), SNIMA.
  20. Moroccan standard (2008b), Testing Hardened Concrete : Preparation and conservation of specimens for strength tests (PNM 10.1.068 : 2008), SNIMA.
  21. Moroccan standard (2008c), Testing Hardened Concrete : Compressive strength of specimens (NM 10.1.051 : 2008), SNIMA.
  22. Moroccan standard (2008d), Testing Hardened Concrete : Splitting tensile strength of specimens (NM 10.1.052 : 2008), SNIMA.
  23. Neville, A.M. (1966), "A general relation for strengths of concrete specimens of different shapes and sizes", In: Journal Proceedings, Vol. 63, No. 10, pp. 1095-1110. https://doi.org/10.14359/7664
  24. Rangari, S., Murali, K. and Deb, A. (2018). Effect of mesostructure on strength and size effect in concrete under compression. Engineering Fracture Mechanics, 195, 162-185. https://doi.org/10.1016/j.engfracmech.2018.04.006
  25. Resan, S.A.F., Chassib, S.M., Zemam, S.K. and Madhi, M.J. (2020), "New approach of concrete tensile strength test", Case Stud. Constr. Mater., 12, p. e00347. https://doi.org/10.1016/j.cscm.2020.e00347
  26. Sadeq, H., Nasser, A., El-Miad, A.K. and Lahlou, M. (2022), "Numerical simulation of direct tensile test of reinforced concrete using Abaqus software", In: Materials Science Forum, Vol. 1066, pp. 159-168. https://doi.org/10.4028/p-8xwy7x
  27. Sengun, E., Sherzai, M.H., Mercan, A.M., Guzelce, A., Alam, B. and Yaman, I.O. (2023), "The impact of specimen size and alteration of fiber configuration on the flexural performance of high-performance concrete", J. Build. Eng., 68, p. 106142. https://doi.org/10.1016/j.jobe.2023.106142
  28. Valizadeh, A., Hamidi, F., Aslani, F. and Shaikh, F.U.A. (2020), "The effect of specimen geometry on the compressive and tensile strengths of self-compacting rubberised concrete containing waste rubber granules", In: Structures, Vol. 27, pp. 1646-1659. https://doi.org/10.1016/j.istruc.2020.07.069
  29. Vu, C.C., Ho, N.K. and Pham, T.A. (2022), "Weibull statistical analysis and experimental investigation of size effects on the compressive strength of concrete-building materials", Case Stud. Constr. Mater., 17, p. e01231. https://doi.org/10.1016/j.cscm.2022.e01231
  30. Wu, Z., Zhang, J., Yu, H., Fang, Q., Ma, H. and Chen, L. (2022), "Three-dimensional mesoscopic investigation on the impact of specimen geometry and bearing strip size on the splitting-tensile properties of coral aggregate concrete", Eng., 17, 110-122. https://doi.org/10.1016/j.eng.2021.02.024
  31. Yi, S.T., Yang, E.I. and Choi, J.C. (2006), "Effect of specimen sizes, specimen shapes, and placement directions on compressive strength of concrete", Nuclear Eng. Des., 236(2), 115-127. https://doi.org/10.1016/j.nucengdes.2005.08.004
  32. Yazıcı, Ş. and Sezer, G.İ. (2007), "The effect of cylindrical specimen size on the compressive strength of concrete", Build. Environ., 42(6), 2417-2420. https://doi.org/10.1016/j.buildenv.2006.06.014
  33. Zhong, W., Pan, J., Wang, J. and Zhang, C. (2021), "Size effect in dynamic splitting tensile strength of concrete : Experimental investigation", Constr. Build. Mater., 270, p. 121449. https://doi.org/10.1016/j.conbuildmat.2020.121449
  34. Zhu, L., Wen, T. and Tian, L. (2022), "Size effects in compressive and splitting tensile strengths of polypropylene fiber recycled aggregate concrete", Constr. Build. Mater., 341, p. 127878. https://doi.org/10.1016/j.conbuildmat.2022.127878