Computers and Concrete

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Time dependent equations for the compressive strength of self-consolidating concrete through statistical optimization

  • Hossain, K.M.A. (Department of Civil Engineering, Ryerson University) ;
  • Lachemi, M. (Department of Civil Engineering, Ryerson University)
  • Received : 2006.07.18
  • Accepted : 2006.08.21
  • Published : 2006.05.25
⟨ Previous Next ⟩

Abstract

Self-consolidating concrete (SCC) in the fresh state is known for its excellent deformability, high resistance to segregation, and use, without applying vibration, in congested reinforced concrete structures characterized by difficult casting conditions. Such a concrete can be obtained by incorporating either mineral or chemical admixtures. This paper presents the results of an investigation to asses the applicability of Abram's law in predicting the compressive strength of SCC to any given age. Abram's law is based on the assumption that the strength of concrete with a specific type of aggregate at given age cured at a prescribed temperature depends primarily on the water-to-cement ratio (W/C). It is doubtful that such W/C law is applicable to concrete mixes with mineral or chemical admixtures as is the case for SCC where water to binder ratio (W/B) is used instead of W/C as the basis for mix design. Strength data of various types of SCC mixtures is collected from different sources to check the performance of Abram's law. An attempt has been made to generalize Abram's law by using various optimization methodologies on collected strength data of various SCC mixtures. A set of generalized equations is developed for the prediction of SCC strength at various ages. The performance of generalized equations is found better than original Abram's equations.

Keywords

References

  1. Ambroise, J. and Pera, J. (1999), 'Properties of self-levelling concrete: Influence of a viscosity agent and cement content', Proce. 23rd OWICS Conference, 25-26 August, Singapore, pp. 52-57
  2. Babu, K. G. and Rao, G. S. N. (1996), 'Efficiency of fly ash in concrete with age', Cement Con. Res., 26(3), 465-474 https://doi.org/10.1016/S0008-8846(96)85034-4
  3. Bosiljkov, V. B. (2003), 'SCC mixes with poorly graded aggregate and high volume of limestone filler', Cement Conc. Res., 33, 1279-1286 https://doi.org/10.1016/S0008-8846(03)00013-9
  4. Bouzoubaa, N. and Lachemi, M. (2001), 'Self-compacting concrete incorporating high volumes of class F fly ash: preliminary results', Cement Conc. Res., 31, pp. 413-420 https://doi.org/10.1016/S0008-8846(00)00504-4
  5. Bui, V., Akkaya, Y., and Shah, S. P. (2002), 'Rheological model for self-consolidating concrete', ACI Mater. J., 99(6), 549-559
  6. Campion, M. J. and Jost, P. (2000), 'Self-compacting concrete', Concrete International: Design and Construction, 22(4), 31-34
  7. Ghezal, A. and Khayat, K.H. (2002), 'Optimizing self-consolidating concrete with limestone filler by using statistical factorial design methods', ACI Mater. J., May, 99(3), 264-272
  8. Hossain, K. M. A. and Lachemi, M. (2004), 'Use of volcanic debris and industrial wastes in the development of self-consolidating concrete for sustainable construction', 5th Structural Specialty Conference of the Canadian Society for Civil Engineering, Saskatoon, Canada, June 2-5
  9. Khayat, K. H., Manai, K., and Trudel, A. (1997), 'In situ mechanical properties of wall elements using self consolidating concrete', ACI Mater. J., Nov-Dec 1997. 94(6), 491-500
  10. Khurana, R. and Saccone, R. (1999), 'Fly ash in self-compacting concrete', Proce. 23rd OWICS Conference, 25-26 August, Singapore, pp. 29-42
  11. Lachemi, M., Hossain, K. M. A., Lambros, V., and Bouzoubaa, N. (2003), 'Development of cost-effective self consolidating concrete incorporating fly ash, slag cement or viscosity modifying admixtures', ACI Mater. J., 100(5), 419-425
  12. Lachemi, M., Hossain, K. M. A., Lambros, V., and Bouzoubaa, N. (2004), 'Self-compacting concrete incorporating new viscosity modifying admixtures', Cement Conc. Res., 34(6), 917-926 https://doi.org/10.1016/j.cemconres.2003.10.024
  13. Nagraj, T. and Banu, Z. (1996), 'Generalization of Abram's law', Cement Concr. Res., 26(6) 933-942 https://doi.org/10.1016/0008-8846(96)00065-8
  14. Neville, A. M. (1995), Properties of Concrete. 4th Ed., Longman Group Ltd., Harlow, England
  15. Oluokun, F. A. (1994), 'Fly ash concrete mix design and the water-cement ratio law', ACI Mater. J. 91(4), 362-371
  16. Ozawa, K., Maekawa, K., Kunishima, H., and Okamura, H. (1989), 'Performance of concrete based on the durability design of concrete structures'. Proce. 2nd East-Asia-Pacific Conference, Volume 1, pp. 445-456
  17. Patel, R., Hossain, K. M. A., Shehata, M., Bouzoubaa, N., and Lachemi, M. (2004), 'Development of statistical models for the mix design of high-volume fly ash self-compacting concrete', ACI Mater. J., July-August, 101(4), 294-302
  18. Petersson, O. (1998), 'Application of self-compacting concrete for bridge castings', Swedish Cement Conc. Res. Inst., 5p
  19. Poon, C. S. and Ho, W. S. (2005), 'A feasibility study on the utilization of r-FA in SCC', Cement Conc. Res., (in press)
  20. Popovics, S. (1990), 'Analysis of the concrete strength versus water-cement ratio relationship', ACI Mater. J., 87(5), 517-529
  21. Rols, S., Ambroise, J., and Pera, J. (1999), 'Effects of different viscosity agents on the properties of self-leveling concrete', Cement Conc. Res., 29(2), 261-266 https://doi.org/10.1016/S0008-8846(98)00095-7

Cited by

  1. Self compacting reinforced concrete beams strengthened with natural fiber under cyclic loading vol.17, pp.5, 2016, https://doi.org/10.12989/cac.2016.17.5.597
  2. Predicting strength of SCC using artificial neural network and multivariable regression analysis vol.20, pp.1, 2006, https://doi.org/10.12989/cac.2017.20.1.031
  3. Case-based reasoning approach to estimating the strength of sustainable concrete vol.20, pp.6, 2017, https://doi.org/10.12989/cac.2017.20.6.645