Title :

Five year drying of high performance concretes: Effect of temperature and cement-type on shrinkage

Author(s) :

Brue, F.N.G. [Auteur]
Davy, Catherine [Auteur]
Burlion, N. [Auteur]
Skoczylas, Frederic [Auteur]
Bourbon, Xavier [Auteur]

Journal title :

Cement and Concrete Research

Volume number :

99

Pages :

70-85

Publication date :

2017-09

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

This experimental study imposes limited relative humidity (RH) gradients to small mature concrete samples, at a constant temperature T = 20, 50 or 80°C. Mass loss and shrinkage are recorded until stabilization at each RH ...
Show more >This experimental study imposes limited relative humidity (RH) gradients to small mature concrete samples, at a constant temperature T = 20, 50 or 80°C. Mass loss and shrinkage are recorded until stabilization at each RH and T, for up to 1991 days. Firstly, our mass loss data are consistent with those presented in former research (on different samples of the same batch). After presenting and analyzing shrinkage kinetics, experimental data are fitted with usual models for shrinkage prediction, at each temperature of 20, 50 and 80°C. An adequate match is obtained by combining capillarity (i.e. Vlahinic's model coupling poro-elastic constants and water saturation level) and desorption (Bangham's equation). Subsequently, relative mass variation (RMV) is plotted against shrinkage data. Three distinct phases are obtained at 20 or 50°C and down to 30%RH; up to four distinct phases are observed at T = 80°C and down to 12%RH. The latter are confirmed by experiments on (60°C; 7%RH) dried concrete. The four phases in the () diagram are interpreted against shrinkage data on mature cement paste dried at 60°C; 7%RH and against the literature.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Autres travaux scientifiques
• Laboratoire de Mécanique, Multi-physique, Multi-échelle (LaMcube) - UMR 9013

Submission date :

2019-09-25T14:06:37Z