- Volume 14 Issue 4
This paper presents an integrated procedure to predict the temperature and moisture distributions in hardening concrete considering the effects of temperature and aging. The degree of hydration is employed as a fundamental parameter to evaluate hydro-thermal-mechanical properties of hardening concrete. The temperature history and temperature distribution in hardening concrete is evaluated by combining cement hydration model with three-dimensional finite element thermal analysis. On the other hand, the influences of both self-desiccation and moisture diffusion on variation of relative humidity are considered. The self-desiccation is evaluated by using a semi-empirical expression with desorption isotherm and degree of hydration. The moisture diffusivity is expressed as a function of degree of hydration and current relative humidity. The proposed procedure is verified with experimental results and can be used to evaluate the early-age crack of hardening concrete.
Degree of Hydration;Temperature Distribution;Moisture Distribution;Hardening Concrete;Modeling
- Tomosawa, F.(1997) "Development of a Kinetic Model for Hydration of Cement," Proceedings of the 10th International Congress Chemistry of Cement, F. S. Glasser and H. Justnes, eds., Gothenburg, V. II, 1997, 8 pp.
- Bazant ZP, Najjar LJ(1972) "Nonlinear water diffusion in nonsaturated Concrete", Materials and Structures, 5 (25) 3-20
- Bentz, D P, Waller V, and De Larrard, F.(1998) "Prediction of Adiabatic Temperature Rise in Conventional and High- Performance Concrete Using a 3-D Microstructural Model," Cement and Concrete Research, 28(2) 285-297. https://doi.org/10.1016/S0008-8846(97)00264-0
- Cook, WD,Aitcin, P C.and Mitchell, D(1993) "Thermal Stresses in Large High-Strength Columns," ACI Materials Journal, 89(1) 61-68.
- Kim JK, Lee CS(1998) "Prediction of differential drying shrinkage in concrete", Cement and Concrete Research, 28 (7) 985-994. https://doi.org/10.1016/S0008-8846(98)00077-5
- Kim JK,Lee CS(1999) "Moisture diffusion of concrete considering self-desiccation at early ages", Cement and Concrete Research, 29(12), 1921-1927 https://doi.org/10.1016/S0008-8846(99)00192-1
- Luzio GD, Cusatis G(2009a) "Hygro-thermo-chemical modeling of high-performance concrete. II: Numerical implementation, calibration, and validation", Cement & Concrete Composites, 31(5),309-324 https://doi.org/10.1016/j.cemconcomp.2009.02.016
- Luzio GD, Cusatis G(2009b) "Hygro-thermo-chemical modeling of high performance concrete. I: Theory", , Cement & Concrete Composites, 31(5),301-308 https://doi.org/10.1016/j.cemconcomp.2009.02.015
- Maekawa K, Ishida T and Kishi T(2009) "Multi-scale modeling of structural concrete", Taylor & Francis, London and New York
- Metha PK, Monteiro PJM (2006) "Concrete, microstructure, properties and materials", McGraw-Hill, New York,2006.
- Navi P, Pignat C(1996) "Simulation of cement hydration and the connectivity of the capillary pore space", Advanced Cement based Materials, 4(2), 58-67. https://doi.org/10.1016/S1065-7355(96)90052-8
- Norling Mjonell K(1997) "A model on self-desiccation in highperformance concrete". In: self-desiccation and its importance in concrete technology, proceedings of the international research seminar. Sweden: Lund; 1997. p. 141-157.
- Oh BW and Cha SW(2003) "Nonlinear Analysis of Temperature and Moisture Distributions in Early-Age Concrete Structures Based on Degree of Hydration", ACI Materials Journal, 100(5), 361-370
- Park KB, Jee NY, Yoon IS, Lee HS(2008) "Prediction of temperature distribution in high-strength concrete using hydration model", ACI Materials Journal,105(2),180-186
- Persson B(1997) "Self-desiccation and its importance in concrete technology", Materials and Structures, 30, 293-305 https://doi.org/10.1007/BF02486354
- Tomosawa F, Noguchi T, Hyeon C(1997) "Simulation model for temperature rise and evolution of thermal stress in concrete based on kinetic hydration model of cement", In: Chandra S (ed)Proceedings of Tenth International Congress Chemistry of Cement. Gothenburg, Sweden , vol.4, pp.72-75.
- Wang, C, and Dilger, WH(1994) "Prediction of Temperature Distribution in Hardening Concrete," Thermal Cracking in Concrete at Early Ages, R. Springenschmid, ed., E&FN Spon, London, UK, 1994, pp. 21-28
- Wang XY, Lee HS(2012) "Evaluation of the mechanical properties of concrete considering the effects of temperature and aging", Construction and Building Materials, 29(1),581-590 https://doi.org/10.1016/j.conbuildmat.2011.11.001
- Yuan Y, Wan ZL(2002) "Prediction of cracking within early-age concrete due to thermal, drying and creep behavior", Cement and Concrete Research, 32(7), 1053-1059 https://doi.org/10.1016/S0008-8846(02)00743-3
- Analysis of the compressive strength development of concrete considering the interactions between hydration and drying 2017, https://doi.org/10.5659/AIKAR.2012.14.4.153
연구 과제 주관 기관 : National Research Foundation of Korea