Analytical model for prediction of temperature distribution in early age mass concrete

  • Authors

    • Ugwuanyi Donald Chidiebere University of Nigeria, Nsukka
    • Okafor Fidelis Onyebuchi University of Nigeria, Nsukka
    2020-04-03
    https://doi.org/10.14419/ijet.v9i2.30368
  • Analytical Model, Thermal Cracks, Mass Concrete, Orthogonality Relations, Separation of Variables
  • Thermally induced cracks have far-reaching implications on the durability of concrete structures. When cement mixes with water, the reaction is exothermic implying the release of heat. In the case of mass concrete structures, quite a substantial increase in internal temperature may be experienced depending on the ambient temperature and cement content in the mix. The objective of the paper is to develop a mathematical model to predict the time dependent temperature profile in early age mass concrete. Mass concrete block was used to verify the model. Type-K thermocouples placed at various positions and digital thermometer was used to monitor the temperature distribution within the mass concrete block at intervals. The highest temperature values occurred within the core of the mass concrete after one day of concrete placement. Analytical model was developed by applying method of separation of variables and orthogonality relation to two dimensional unsteady state heat conduction equations. The model equation was evaluated and using MATLAB based computer programe. The model successfully predicted the temperature variation within the mass concrete with time. It is therefore suitable for use in the assessment of thermal cracks potential in mass concrete structures.

     

  • References

    1. [1] S. Worapong, H. Nakamura, M. Kunieda, Y. Ishikawa, Analysis of crack propagation due to thermal stress in concrete considering slodified constitutive model, Journal of Advanced Concrete Technology, 5 (1) (2007) 99-112. https://doi.org/10.3151/jact.5.99.

      [2] B. Klemczak, A. Knoppik-Wrobel, Numerical model for analysis of early-age thermal-moisture effects in an RC wall, Technical Transactions, Civil Engineering, 1-B (2003) 99-113.

      [3] L. Jendele, V. Smilauer, J. Cervenka, Multi-scale analysis of heat transport in hydrating concrete structures, Proceedings of the Thirteenth International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp Press, Stirlingshere, paper 124, Scotland, (2011),

      [4] M. H. Lee, B. S. Khil, H. D. Yun, Influence of cement type on heat of hydration and temperature rise of the mass concrete, Indian Journal of Engineering & Material Sciences, 21 (2014) 536-542.

      [5] D. S. Guo, E. Y. Chen, G. L. Low, J. L. Yang, Experimental modeling of temperature rise of mass concrete by FDM method, 26th Conference on Our World in Concrete & Structures, (2001) 261-267.

      [6] W. Liu, W. Cao, H. Yan, T. Ye, W. Jia, Experimental and numerical studies of controlling cracks in mass concrete foundation by circulating water, Applied Sciences, 6 (110) (2016) 1-18. https://doi.org/10.3390/app6040110.

      [7] B. Kuriakose, B. N. Rao, G. R. Dodagoudar, Modeling of early age concrete temperature distribution in thick rafts, 5th International Congress on Computational Mechanics and Simulation, (2014) 10 -13. https://doi.org/10.3850/978-981-09-1139-3_294.

      [8] H. Abeka, S. Agyeman, M. A. Asamoah, Thermal effect of mass concrete structures in the tropics: experimental, modeling and parametric studies, Cogent Engineering 4 (2017) 127829. https://doi.org/10.1080/23311916.2016.1278297.

      [9] W. G. J. Prasanna, A. P. Subhashini, Cracking due to temperature gradient in concrete, International Conference on Sustainable Built Environment (ICSBE), Kandy, (2010) 496-504.

  • Downloads

  • How to Cite

    Donald Chidiebere, U., & Fidelis Onyebuchi, O. (2020). Analytical model for prediction of temperature distribution in early age mass concrete. International Journal of Engineering & Technology, 9(2), 359-366. https://doi.org/10.14419/ijet.v9i2.30368