Computers and Concrete

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

An improvement on the concrete exothermic models considering self-temperature duration

  • Zhu, Zhenyang (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research) ;
  • Chen, Weimin (Hydrochina Huadong Engineering Corporation) ;
  • Qiang, Sheng (College of Water Conservancy and Hydropower Engineering, Hohai University) ;
  • Zhang, Guoxin (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research) ;
  • Liu, Youzhi (State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research)
  • Received : 2016.05.18
  • Accepted : 2017.02.17
  • Published : 2017.06.25
⟨ Previous Next ⟩

Abstract

Based on the Arrhenius equations, several hydration exothermic models that precisely calculate the influence of concrete's self-temperature duration on its hydration exothermic rate have been presented. However, the models' convergence is difficult to achieve when applied to engineering projects, especially when the activation energy of the Arrhenius equation is precisely considered. Thus, the models' convergence performance should be improved. To solve this problem and apply the model to engineering projects, the relationship between fast iteration and proper expression forms of the adiabatic temperature rise, the coupling relationship between the pipe-cooling and hydration exothermic models, and the influence of concrete's self-temperature duration on its mechanical properties were studied. Based on these results, the rapid convergence of the hydration exothermic model and its coupling with pipe-cooling models were achieved. The calculation results for a particular engineering project show that the improved concrete hydration exothermic model and the corresponding mechanical model can be suitably applied to engineering projects.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China, Zhejiang Provincial Natural Science Foundation

References

  1. Cervera, M., Faria, J., Oliver, J. and Prato, T. (2002), "Numerical modeling of concrete curing regarding hydration and temperature phenomena", Comput. Struct., 80(18), 1511-1521. https://doi.org/10.1016/S0045-7949(02)00104-9
  2. Emborg, M. (1989), "Thermal stresses in concrete structures at early ages", Ph.D. Dissertation, Lulea University of Technology, Lulea, Sweden.
  3. Guan, Z. and Lu, J.Y. (2012), Fundamentals of Numerical Analysis, Higher Education Press, Beijing, China.
  4. Guo, Y.C., Wang, X. and Qian, J.S. (2015), "Physical model of drying shrinkage of recycled aggregate concrete", J. Wuhan Univ. Technol.-Mater. Sci. Ed., 30(6), 1260-1267. https://doi.org/10.1007/s11595-015-1305-4
  5. Hatte, J.H. and Thorborg, J. (2003), "A numerical model for predicting the thermomechanical conditions during hydration of early-age concrete", Appl. Math. Mod., 27(1), 1-26. https://doi.org/10.1016/S0307-904X(02)00082-3
  6. Kim, S.J., Yang, K.H. and Lee, K.H. (2016), "Mechanical properties and adiabatic temperature rise of low heat concrete using ternary blended cement", Comput. Concrete, 17(2), 271-280. https://doi.org/10.12989/cac.2016.17.2.271
  7. Li, B., Mao, J.Z., Lv, J.F. and Zhou, L.M. (2016), "Effects of micropore structure on hydration degree and mechanical properties of concrete in later curing age", Eur. J. Environ. Civil Eng., 20(5), 544-599. https://doi.org/10.1080/19648189.2015.1056383
  8. Liu, M.Z., Qiang, S. and Zhu, Z.Y. (2011), "Study on crack mechanism for concrete bedding cushion on rock", Adv. Mater. Res., 163, 1291-1295.
  9. Luo, M., Qian, C.X., Li, R. and Rong, H. (2015), "Efficiency of concrete crack-healing based on biological carbonate precipitation", J. Wuhan Univ. Technol.-Mater. Sci. Ed., 30(6), 1255-1259. https://doi.org/10.1007/s11595-015-1304-5
  10. Park, K.B., Kwon, S.J. and Wang, X.Y. (2015), "Analysis of the effects of rice husk ash on the hydration of cementitious materials", Constr. Build. Mater., 105, 196-205.
  11. Schutter, G.D. (2002), "Finite element simulation of thermal cracking in massive hardening concrete elements using degree of hydration based material laws", Comput. Struct., 80(27), 2035-2042. https://doi.org/10.1016/S0045-7949(02)00270-5
  12. Suzuki, Y., Harada, S., Maekawa, K. and Tsuji, Y. (1988), "Evaluation of adiabatic temperature rise of concrete measured with the new testing apparatus", Doboku Gakkai Rombun H120 Okokushu, 9, 109-117.
  13. Wang, J.C. and Yan, P.Y. (2013), "Evaluation of early age mechanical properties of concrete in real structure", Comput. Concrete, 12(1), 53-64. https://doi.org/10.12989/cac.2013.12.1.053
  14. Zhang, Z.M., Feng, S.R., Shi, Q.C. and Wang, J. (2004), "Adiabatic temperature rise of concrete based on equivalent time", J. Hohai Univ. (Natur. Sci.), 32(5), 573-577.
  15. Zhang, Z.M., Zhou, H.J. and Zhao, J.K. (2004), "Influences of temperature on strength of concrete", J. Hohai Univ. (Natur. Sci.), 32(6), 674-679.
  16. Zhu, B.F. (1999), Thermal Stresses and Temperature Control of Mass Concrete, China Electric Power Press, Beijing, China.
  17. Zhu, B.F. (2003), "A method for computing the adiabatic temperature rise of concrete considering the effect of the temperature of concrete", J. Hydroelectr. Eng., 20(2), 69-73.
  18. Zhu, B.F. (2003), "A new computing model for the adiabatic temperature rise of concrete and the method of back analysis", Wat. Pow., 4, 29-32 .
  19. Zhu, Z.Y., Qiang, S. and Chen, W.M. (2013), "A new method solving the temperature field of concrete around cooling pipes", Comput. Concrete, 11(5), 441-462. https://doi.org/10.12989/cac.2013.11.5.441
  20. Zhu, Z.Y., Qiang, S. and Chen, W.M. (2014), "A model for temperature influence on concrete hydration exothermic rate (Part one: Theory and experiment)", J. Wuhan Univ. Technol.-Mater. Sci. Ed., 29(3), 540-545. https://doi.org/10.1007/s11595-014-0954-z
  21. Zhu, Z.Y., Qiang, S., Liu, M.Z. and Wang, H.B. (2011), "Cracking mechanism of long concrete bedding cushion and prevention method", Adv. Mater. Res., 163, 880-887.