Long-Term Deformations of Concrete Structures

Drying is a phenomenon that accompanies the hardening of hydraulic materials. This study is concerned the modelling of drying shrinkage of the hydraulic materials and the prediction of the rate of spontaneous deformations of hydraulic materials during hardening. The model developed takes consideration of the main factors affecting drying shrinkage. There was agreement between drying shrinkage predicted by the developed model and experimental results. In last we show that developed model describe the evolution of the drying shrinkage of high performances concretes correctly.

Authors:

• A. Brahma

Keywords:

• Drying
• hydraulic concretes
• shrinkage
• modeling
• prediction.

References:

[1] A. Brahma "Study of the dimensional variations of slag-sands during
their hydration" thesis, 1986, Toulouse-3 University; French
[2] A. Brahma; J.P. Ollivier; C.H. Détriché "Analyse expérimentale des
variations dimensionnelles des sables-laitiers en cours d’hydratation"
Materials and Structures; vol33, April 2000; pp171-180.
[3] Z. P Bazant; F. EL. Wittman; J. K Kim; F. Alou "Statistical
extrapolation of shrinkage data - Part 1: Regression and Part 2: Bayesian
Updating", ACI Materials journal, n° 84-M4, 1985
[4] M. Auperin; F. De Larrard; P. Richard; P. Acker "Retrait et fluage de
bétons à hautes performances aux fumées de silice -Influence de l'âge au
chargement" Annales de l'ITBTP, N°474, mai-juin 1989
[5] G. Abiar "Contribution à l'étude des déformations différées du béton en
tenant compte de l'hygrométrie interne: Un modèle de séchage pour le
béton", Thèse de doctorat de l’ENPC, 1986.
[6] Z.P Bazant; J.K Kim "Improved prediction model for time dependent
deformations of concrete" part 1- shrinkage, Materials and structures,
N°24, 1991
[7] Z.P Bazant; S. Baweja "Creep and shrinkage prediction model for
analysis and design of concrete structures: Model B3" ACI international,
Mitchigan, SP-194, 2000
[8] L. Granger Thèse "Comportement différé dans les enceintes de centrales
nucléaires: analyse et modélisation" ENPC paris 1995.
[9] L. Granger "Comportement différé du béton dans les enceintes de
centrales nucléaires: le passage éprouvette structure", 12èmes journées
universitaires de génie civil, tome 1, Prix René Houpert, Toulouse, 23-
24 pp. 99-106, mars, 1994.