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In this paper, the results of experimental study concerning the calorimetric measurements of heat of hydration of cement pastes with different w/c ratio and different hygral conditions are presented. The model of cement hydration proposed by Parrot and Killoh [1] is implemented in the model of concrete at early ages by Gawin et al. [2], which allows us to carry out simulations of the evolution of hydration degree in different conditions of maturing. The results of the simulations are compared with the experimental data, both obtained by the authors and published elsewhere.
W artykule zostały przedstawione wyniki badań kalorymetrycznych ciepła hydratacji dla zaczynów cementowych o różnym stosunku w/c dojrzewających w różnych warunkach wilgotnościowych. Implementacja opisu procesu hydratacji autorstwa Parrot and Killoh [1] do modelu numerycznego młodego betonu autorstwa Gawina i in. [2] pozwala na przeprowadzenie symulacji ewolucji stopnia hydratacji w różnych warunkach dojrzewania. Wyniki symulacji z użyciem wspomnianego modelu zostały porównane z wynikami badań eksperymentalnych.
Czasopismo
Rocznik
Tom
Strony
45--54
Opis fizyczny
Bibliogr. 16 poz.
Twórcy
autor
autor
- Technical University of Lodz, Department of Building Physics and Building Materials, dariusz.gawin@p.lodz.pl
Bibliografia
- [1] Parrot L.J., Killoh D.C.; Prediction of cement hydration. Br. Ceram. Proc. 1984, 35, p. 41-53
- [2] Gawin D., Pesavento F., Schrefler B.A.; Hygro-thermo-chemo-mechanical modelling of concrete at early ages and beyond. Part I: Hydration and hygro-thermal phenomena, Part II: Shrinkage and creep of concrete. International Journal for Numerical Methods in Engineering, 2006, 67 (3), p. 299-331, p. 332-363
- [3] Neville A.M.; Properties of concrete (4th edition). Harlow: Prentice hall, 2000
- [4] Schindler A.K., Folliard K.J.; Influence of supplementary cementing materials on the heat of hydration of concrete. In: Advances in Cement and Concrete IX Conference, Copper Mountain, 2003
- [5] Jensen O.M., Hansen P.F.; Influence of temperature on autogenous deformation and relative humidity change in hardening cement paste. Cement and Concrete Research, 1999, 29, p. 567-575
- [6] Ulm F.J., Coussy O.; Couplings in early-age concrete: from material modeling to structural design. International Journal of Solids and Structures, 1998, 35, p. 4295-4311
- [7] Lura P.; Autogenous deformation and internal curing of concrete. PhD Thesis. Delft: Delft University Press Science, 2003
- [8] Jensen O.M., Hansen P.F.; Water-entrained cement- based materials: I. Principles and theoretical background. Cement and Concrete Research, 2001, 31 (4), p. 647-654
- [9] Jensen O.M., Hansen P.F., Lachowski E.E., Glasser F.P.; Clinker mineral hydration at reduced relative humidities. Cement and Concrete Research. 1999, p. 1505-1512
- [10] Bentz D.P.; Internal curing of high-performance blended cement mortars. ACI Materials Journal. 2007, p. 408-4I4
- [11] Wyrzykowski M.; Modelling coupled thermo-hygral processes in maturing concrete exposed to internal and external curing, PhD Thesis (Tutor: Gawin D.), Technical University of Lodz, 2010
- [12] Taylor H.F.W.; Cement chemistry. 2nd ed. London: Thomas Telford Publishing, 1997
- [13] Mills R.H.; Factors influencing cessation of hydration in water-cured cement pastes. Special report No. 90. Washington, D.C.: Highway Research Board, 1966
- [14] Lothenbach B., Le Saout G., Gallucci E, Scrivener K.; Influence of limestone on the hydration of Portland cements. Cement and Concrete Research, 2008, 38, p. 848-860
- [15] Bazant Z.P., Najjar L.J.; Nonlinear water diffusion in nonsaturated concrete. Materials and Structures, 1972, 5(25), p. 3-20
- [16] Lura P., Jensen O.M, van Breugel K.; Autogenous shrinkage in high-performance cement paste: An evaluation of basic mechanisms. Cement and Concrete Research, 2003, 33(2), p. 223-232
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL2-0025-0045