Effects of the Water-Cement Ratio and the Molding Temperature on the Hydration Heat of Cement

Abstract

The effects of the water-cement ratio and the molding temperature on the hydration heat of cement were investigated with semi-adiabatic calorimetry. The specimens were prepared with water-cement ratios of 0.31, 0.38, and 0.45, and the molding temperature was specified at 10 and 20 °C. The experimental results show that, as the water-binder ratio increases, the value of the second temperature peak on the temperature curve of the cement paste decreases, and the age at which the peak appears is delayed. The higher the water-cement ratio, the higher the hydration heat release in the early period of cement hydration, but this trend reverses in the late period. There are intersection points of the total hydration heat curve of the cement pastes under the influence of the water-cement ratio, and this law can be observed at both molding temperatures. With the increase in the molding temperature, the age of the second temperature peak on the temperature curve of the cement paste will advance, but the temperature peak will decrease. The higher the molding temperature, the earlier the acceleration period of the cement hydration began, and the larger the hydration heat of the cement in the early stage, but the smaller the total heat in the late period. A subsection function calculation model of the hydration heat, which was based on the existing models, was proposed in order to predict the heat of the hydration of the concrete.

Keywords

semi-adiabatic calorimetry / hydration heat / water-cement ratio / molding temperature / modeling

References

[1] Taylor HFW. Cement Chemistry[M], 1997 London: Thomas Telford.

[2] Hu J, Ge Z, Wang KJ. Influence of Cement Fineness and Water-to-Cement Ratio on Mortar Early-Age Heat of Hydration and Set Times[J]. Constr. Build. Mater., 2014, 50: 657-663.

[3] Khelidj A, Mounanga P, Baroghel Bouny V. Autogenous Deformations of Cement Pastes, Part II. W/C Effects, Micro-Macro Correlations, and Threshold Values[J]. Cem. Concr. Res., 2006, 36(1): 123-136.

[4] Bentz DP, Stutzman PE, Zunino F. Low-Temperature Curing Strength Enhancement in Cement-Based Materials Containing Limestone Powder[J]. Mater. Struct., 2017, 50(3): 1-14.

[5] Thongsanitgarn P, Wongkeo W, Chaipanich A, et al. Heat of Hydration of Portland High-Calcium Fly Ash Cement Incorporating Limestone Powder: Effect of Limestone Particle Size[J]. Constr. Build. Mater., 2014, 66: 410-417.

[6] Mostafa NY, Brown PW. Heat of Hydration of High Reactive Pozzolans in Blended Cements: Isothermal Conduction Calorimetry[J]. Thermochim. Acta., 2005, 435(2): 162-167.

[7] Tikkanen J, Cwirzen A, Penttala V. Effects of Mineral Powders on Hydration Process and Hydration Products in Normal Strength Concrete[J]. Constr. Build. Mater., 2014, 72: 7-14.

[8] Bentz DP. Influence of Water-to-Cement Ratio on Hydration Kinetics: Simple Models Based on Spatial Considerations[J]. Cem. Concr. Res., 2006, 36(2): 238-244.

[9] Chen XD, Wu SX. Influence of Water-to-Cement Ratio and Curing Period on Pore Structure of Cement Mortar[J]. Constr Build. Mater., 2013, 38: 804-812.

[10] Ley Hernandez AM, Lapeyre J, Cook R, et al. Elucidating the Effect of Water-to-Cement Ratio on the Hydration Mechanisms of Cement[J]. ACS. Omega., 2018, 3(5): 5092-5105.

[11] Lin F, Meyer C. Hydration Kinetics Modeling of Portland Cement Considering the Effects of Curing Temperature and Applied Pressure[J]. Cem. Concr Res., 2009, 39(4): 255-265.

[12] Siler P, Kratky J, De Belie N. Isothermal and Solution Calorimetry to Assess the Effect of Superplasticizers and Mineral Admixtures on Cement Hydration[J]. J. Therm. Anal. Calorim., 2012, 107(1): 313-320.

[13] Jensen OM. Thermodynamic Limitation of Self-Desiccation[J]. Cem. Concr. Res., 1995, 25(1): 157-164.

[14] Cervera M, Faria R, Oliver J, et al. Numerical Modeling of Concrete Curing, Regarding Hydration and Temperature Phenomena[J]. Comput. Struct., 2002, 80(18–19): 1511-1521.

[15] Lothenbach B, Matschei T, Möschner G, et al. Thermodynamic Modelling of the Effect of Temperature on the Hydration and Porosity of Portland Cement[J]. Cem. Concr Res., 2008, 38(1): 1-18.

[16] Wyrzykowski M, Lura P, Pesavento F, et al. Modeling of Internal Curing in Maturing Mortar[J]. Cem. Concr Res., 2011, 41(1): 1349-1356.

[17] Vu MH, Sulem J, Laudet JB. Effect of the Curing Temperature on the Creep of a Hardened Cement Paste[J]. Cem. Concr Res., 2012, 42(9): 1233-1241.

[18] Wang XY, Lee HS. Modeling of Hydration Kinetics in Cement Based Materials Considering the Effects of Curing Temperature and Applied Pressure[J]. Construct. Build. Mater., 2012, 28(1): 1-13.

[19] Deschner F, Lothenbach B, Winnefeld F. Effect of Temperature on the Hydration of Portland Cement Blended with Siliceous Fly Ash[J]. Cem. Concr. Res., 2013, 52(13): 169-181.

[20] Han FH, Liu RG, Wang DM, et al. Characteristics of the Hydration Heat Evolution of Composite Binder at Different Hydrating Temperature[J]. Thermochim. Acta., 2014, 586: 52-57.

[21] Berger RL, Bentur A, Milestone NB, et al. Structural Properties of Calcium Silicate Pastes: II, Effect of the Curing Temperature[J]. J. Am. Ceram. Soc., 1979, 62(7–8): 362-366.

[22] Boubekeur T, Ezziane K, Kadri EH. Quantification and Analysis of Heat Hydration of Blended Cement at Different Temperature[J]. J. Adhes. Sci. Techno., 2017, 31(24): 2741-2756.

[23] De Weerdt K, Haha MB, Le Saout G, et al. The Effect of Temperature on the Hydration of Composite Cements Containing Limestone Powder and Fly Ash[J]. Mater. Struct., 2012, 45(7): 1101-1114.

[24] Stark J. Recent Advances in the Field of Cement Hydration and Microstructure Analysis[J]. Cem. Concr Res., 2011, 41(7): 666-678.

[25] Zhang J, Weissinger EA, Peethamparan S, et al. Early Hydration and Setting of Oil Well Cement[J]. Cem. Concr Res., 2010, 40(7): 1023-1033.

[26] Gebregziabiher BS, Thomas R, Peethamparan S. Very Early-Age Reaction Kinetics and Microstructural Development in Alkali-activated Slag[J]. Cem. Concr Res., 2015, 55: 91-102.

[27] Kadri EH, Kenai S, Boukhelkhal D, et al. Combined Effect of Mineral Admixture and Curing Temperature on Mechanical Behavior and Porosity of SCC[J]. Adv. Concr Constr, 2018, 6(1): 69-85.

[28] Morabito P. Adiabatic and Semi-Adiabatic Calorimetric to Determine the Temperature Increase in Concrete Due to Hydration Heat of the Cement[J]. Mater. Struct., 1997, 30(8): 451-464.

[29] Parrott LJ, Geiker M, Gutteridge WA. Monitoring Portland Cement Hydration: Comparison of Methods[J]. Cem. Concr. Res., 1999, 20(6): 919-26.

[30] Hernandez Bautista E, Bentz DP, Sandoval Torres S, et al. Numerical Simulation of Heat and Mass Transport During Hydration of Portland Cement Mortar in Semi-Adiabatic and Steam Curing Conditions[J]. Cem. Concr Res., 2016, 69: 38-48.

[31] Tydlitat V, Zakoutsky J, Volfova P. Hydration Heat Development in Blended Cements Containing Fine-Ground Ceramics[J]. Thermochim. Acta., 2012, 543: 125-129.

[32] Xu QW, Hu J, Ruiz JM, et al. Isothermal Calorimetry Tests and Modeling of Cement Hydration Pparameters[J]. Thermochim. Acta., 2010, 499(1–2): 91-99.

[33] Chinese Standard. Test Methods for Heat of Hydration of Cement[S]. GB/T 12959, 2008

[34] Zhang L. Principles of Chemical Reaction Engineering[M], 2000 Shanghai: East China University of Science and Technology Press.

[35] Wang AQ, Zhang CZ, Sun W. Fly ash effects II. The Active Effect of Fly Ash[J]. Cem Concr Res., 2005, 34(11): 2057-60.

[36] Aïtcin PC. High Performance Concrete[M], 1998 Praha: E& FN Spoon.

[37] Van Breugel K. Simulation of Hydration and Formation of Structure in Hardening Cement-Based Materials[D], 1991 The Netherlands: Delft Univers of Technoloitygy.

[38] Franz Josef U, Olivier C. Modeling of Thermochemomechanical Couplings of Concrete at Early Ages[J]. J. Eng. Mech., 1995, 121(7): 785-794.

[39] Zhu BF. A Method for Computing the Adiabatic Temperature Rise of Concrete Considering the Effect of the Temperature of Concrete[J]. J. hydro. Eng., 2003, (2): 69–73

[40] Yang KH, Moon GD, Jeon YS. Implementing Ternary Supplementary Cementing Binder for Reduction of the Heat of Hydration of Concrete[J]. J. Clean. Prod., 2016, 112(1): 845-852.