Cement and concrete research, Vol. 39 N° 5. Cement and concrete research - Mai 2009
| Titre : | Cement and concrete research, Vol. 39 N° 5. Cement and concrete research - Mai 2009 |
| Type de document : | Bulletin |
| Paru le : | 15/11/2009 |
Dépouillements
Article : texte imprimé
Masahiro Suzuki, Auteur ;
Mohammed Seddik Meddah, Auteur ;
Ryoichi Sato, Auteur
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Internal curing has become extensively used to reduce autogenous shrinkage and consequently mitigate the high risk of early age cracking of high-performance concrete (HPC). This paper investigates the efficiency of internal wet curing provided b[...]
Article : texte imprimé
Yingzi Yang, Auteur
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Self-healing of Engineered Cementitious Composites (ECC) subjected to two different cyclic wetting and drying regimes was investigated in this paper. To quantify self-healing, resonant frequency measurements were conducted throughout wetting–dry[...]
Article : texte imprimé
A. Poursaee, Auteur ;
C.M. Hansson, Auteur
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Electrochemical assessment of the condition of embedded reinforcing bar (rebar) in concrete is being carried out increasingly routinely, both in the laboratory and in the field. However, because of the perceived need to produce results very rapi[...]
Article : texte imprimé
D. Lootens, Auteur ;
P. Jousset, Auteur ;
Laetitia Martinie, Auteur
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Measurements of highly visco-elastic media such as cementitious materials during hardening and setting are difficult with standard rheometers. That is why the transition between liquid and solid state of cement based materials is currently measu[...]
Article : texte imprimé
M. Tyler Ley, Auteur ;
Kevin J. Folliard, Auteur ;
Kenneth C. Hover, Auteur
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Recent experimental work is presented using a new technique to observe bubbles that have escaped from cement pastes and suspended in the bleed water. These experiments suggest that the stability of an air-entrained bubble may be related to the i[...]
Article : texte imprimé
M. Tyler Ley, Auteur ;
Ryan T. Chancey, Auteur ;
Maria C.G. Juenger, Auteur
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Recent research has suggested that the shell of an air-entrained void is important for resisting coalescence between air-voids and diffusion of gas from the surrounding fluid. The current paper describes the physical and chemical properties of a[...]
Article : texte imprimé
K. Van Den Abeele, Auteur ;
W. Desadeleer, Auteur ;
G. De Schutter, Auteur
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Microstructural changes occurring in freshly poured concrete during curing have been monitored on a laboratory scale using a combination of the Acoustic Emission (AE) Technique with linear and nonlinear ultrasonic/elastic wave spectroscopy. The [...]
Article : texte imprimé
Rikard Ylmén, Auteur ;
Ulf Jäglid, Auteur ;
Britt-Marie Steenari, Auteur
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Diffuse Reflectance Infrared DR-FTIR spectroscopy is employed to monitor chemical transformations in pastes of Portland limestone cement. To obtain a sufficient time resolution a freeze-dry procedure is used to instantaneously ceasing the hydrat[...]
Article : texte imprimé
A. M. Betioli, Auteur ;
P.J.P. Gleize, Auteur ;
D.A. Silva, Auteur
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Chemical admixtures increase the rheological complexity of cement pastes owing to their chemical and physical interactions with particles, which affects cement hydration and agglomeration kinetics. Using oscillatory rheometry and isothermal calo[...]
Article : texte imprimé
Gerdes, Christian J., Auteur ;
Hans A. van der Sloot, Auteur
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The pH dependent leaching characteristics were assessed for different types of recycled concrete aggregates, including real construction debris and crushed fresh concrete samples prepared in laboratory. Carbonation effects were identified from t[...]
Article : texte imprimé
P. De Silva, Auteur ;
L. Bucea, Auteur ;
V. Sirivivatnanon, Auteur
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The influence of magnesium on the chemistry of calcium carbonate formation has been studied. It was found that the type of carbonate formed by subjecting compacts of Ca(OH)2 and Mg(OH)2 to carbon dioxide (up to 20 atm CO2 pressure) for variable[...]
Article : texte imprimé
F. Deby, Auteur ;
M. Carcassès, Auteur ;
A. Sellier, Auteur
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A probabilistic approach to durability is proposed for the design of reinforced cover of a concrete immersed in sea water. It uses a non-linear chloride diffusion model for a saturated medium, which is first exposed with its physical parameters.[...]
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