Size effect at testing strength properties of concrete

• Autorzy: Akram Amanda

Identyfikatory

DOI

10.35784/bud-arch.2821

• Języki publikacji: EN

Abstrakty

EN

Various strength characteristics of concrete are considered as fracture parameters. The compressive strength of concrete is of paramount importance when designing concrete structures, whereas tensile strength of concrete is the basic property when estimating cracking resistance of a structure and analysing fracture processes in concrete. When testing the compressive strength of concrete, the results are dependent on the shape and dimensions of used specimens. Some findings reported in the literature suggest that size effect exists also when testing such fracture properties of concrete as tensile strength. Unfortunately this problem is much less recognized and described compared to size effect in compressive test results. In this paper, the experimental investigation is presented on how the length of cylindrical specimens influences the tensile splitting strength of concrete obtained by means of the Brazilian method. Additional variable parameters were: type of aggregate (natural gravel and crushed granite) and cement-water ratio (C/W = 1.8 and C/W = 2.6). In conducted laboratory experiments a higher splitting tensile strength of concrete was noted for all specimens with nominal dimensions of 150×150 mm, compared to specimens 150×300 mm in size, regardless of type of aggregate or cement-water ratio.

Słowa kluczowe

EN

concrete; size effect; tensile strength

• Wydawca: Wydawnictwo Politechniki Lubelskiej
• Czasopismo: Budownictwo i Architektura
• Rocznik: 2021
• Tom: Vol. 20, no 4
• Strony: 37--45
• Opis fizyczny: Bibliogr. 20 poz., fig., tab.

Twórcy

autor

Akram Amanda

• Wydział Budownictwa i Architektury; Politechnika Lubelska; Polska

• https://orcid.org/0000-0001-5619-2927

Bibliografia

• 1. EN 12390-1:2013-03 - Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and moulds, European Committee for Standardization, 2013.
• 2. EN 12390-3:2019-07 - Testing hardened concrete - Part 3: Compressive strength of test specimen, European Committee for Standardization, 2019.
• 3. EN 12390-6:2011 - Testing hardened concrete - Part 6: Tensile splitting strength of test specimen, European Committee for Standardization, 2011.
• 4. Aitcin P. C., Miao B., Cook W., Mitchell D., “Effects of size and curing on cylinder compressive strength of normal and high-strength concretes”, ACI Materials Journal, vol. 91(4), 1994, pp. 349-354.
• 5. Malaikah A., “Effect of Specimen Size and Shape on the Compressive Strength of High Strength Concrete”, Pertanika J Sci Technol, 13(1), 2005, pp. 81-96.
• 6. Che Y. et al., “Effect of Specimen Shape and Size on Com-pressive Strength of Concrete”, Advanced Materials Research, vol. 163-167, 2010, pp. 1375-1379. http://doi.org/10.4028/www.scientific.net/AMR.163-167.1375
• 7. Sudin M.A.S., Ramli M., “Effect of Specimen Shape and Size on the Compressive Strength of Foamed Concrete”, MATEC Web of Conferences, vol. 10(1), 2014. https://doi.org/10.1051/matecconf/20141002003
• 8. Zhong W, Pan J, Wang J, Zhang C., “Size effect in dynamic splitting tensile strength of concrete: Experimental investigation”, Construction and Building Materials, vol. 270(3), 2020. https://doi.org/10.1016/j.conbuildmat.2020.121449
• 9. Liu J, Wenxuan Y, Xiuli D, Wangxian Y., “Mesoscopic numerical simulation of dynamic size effect on the splitting-tensile strength of concrete”, Engineering Fracture Mechanics, vol. 209, 2019, pp. 317-332. https://doi.org/10.1016/j.engfracmech.2019.01.035
• 10. Suchorzewski J, Tejchman J, Nitka M., “Experimental and numerical investigations of concrete behaviour at meso-level during quasi-static splitting tension”, Theoretical and Applied Fracture Mechanics, vol. 96, 2018, pp. 720-739. https://doi.org/10.1016/j.tafmec.2017.10.011
• 11. Zhu R., “Scale and Aggregate Size Effects on Concrete Fracture: Experimental Investigation and Discrete Element Modelling”, Civil Engineering, Écolecentrale de Nantes, 2018.
• 12. Chandran K. S. R., Galyon Dorman S., “The nature of specimen-size-effect on fatigue crack growth and net-section fracture mechanics approach to extract the size-independent behavior”, International Journal of Fatigue, vol. 145(2), 2021. https://doi.org/10.1016/j.ijfatigue.2020.106088
• 13. EN 12390-5:2019-08 - Testing hardened concrete: Flexural strength of test specimens, European Committee for Standardization, 2019.
• 14. PN-B-06250 – Beton zwykły (Eng. Plain concrete), Polski Komitet Normalizacyjny Miar i Jakości, 1988.
• 15. Benkemoun N., Khazraji H. A., Poullain P., Choinska M., Khelidj A., “3-D mesoscale simulation of crack-permeability coupling in the Brazilian splitting test”, International Journal for Numerical and Analytical Methods in Geomechanics, vol. 42(1), 2017, pp. 1-20. https://doi.org/10.1002/nag.2749
• 16. Słowik M., Stroeven P., Akram A., “Crack mechanisms in concrete – from micro to macro scale”, Budownictwo i Architektura, 19(4), 2020, pp. 55-65. http://doi.org/10.35784/bud-arch.2147
• 17. Karamloo M., Mazloom M., Payganeh G., “Influences of water to cement ratio on brittleness and fracture parameters of self-compacting lightweight concrete”, Engineering Fracture Mechanics, 168(A), 2016, pp. 227-241. http://doi.org/10.1016%2Fj.engfracmech.2016.09.011
• 18. Nitka M., Tejchman J., “Meso-mechanical modelling of damage in concrete using discrete element method with porous ITZs of defined width around aggregates”, Engineering Fracture Mechanics, 231, 2020, https://doi.org/10.1016/j.engfracmech.2020.107029.
• 19. Sadrmomtazi A., Lotfi-Omran O., Nikbin I.M., “Influence of cement content and maximum aggregate size on the fracture parameters of magnetite concrete using WFM, SEM and BEM”, Theoretical and Applied Fracture Mechanics, 107, 2020, https://doi.org/10.1016/j.tafmec.2020.102482.
• 20. EN 196-1:2016-07 – Methods of testing cement – Part 1: Determination of strength, European Committee for Standardization, 2016

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).