Cement and concrete research, Vol. 40 N° 2 (02 ex.). Cement and concrete research - Fevrier 2010
| Titre : | Cement and concrete research, Vol. 40 N° 2 (02 ex.). Cement and concrete research - Fevrier 2010 |
| Type de document : | Bulletin |
| Paru le : | 09/03/2010 |
Dépouillements
Article : texte imprimé
J. Pourchez, Auteur ;
P. Grosseau, Auteur ;
B. Ruot, Auteur
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The influence of cellulose ethers (CE) on C3S hydration processes was examined in order to improve our knowledge of the retarding effect of cellulose ethers on the cement hydration kinetics. In this frame, the impacts of various cellulose ethers[...]
Article : texte imprimé
Jae Eun Oh, Auteur ;
Paulo J.M. Monteiro, Auteur ;
Ssang Sun Jun, Auteur
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The increase in strength and evolution of crystalline phases in inorganic polymer cement, made by the alkali activation of slag, Class C and Class F fly ashes, was followed using compressive strength test and synchrotron X-ray diffraction. In or[...]
Article : texte imprimé
Vít Smilauer, Auteur ;
Zdenek P. Bazant, Auteur
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A powerful and robust numerical homogenization method based on fast Fourier transform (FFT) is formulated to identify the viscoelastic behavior of calcium silicate hydrates (C-S-H) in hardened cement paste from its heterogeneous composition. The[...]
Article : texte imprimé
F. Brunet, Auteur ;
T. Charpentier, Auteur ;
C. N. Chao, Auteur
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The long term behaviour of cement based materials is strongly dependent on the paste microstructure and also on the internal chemistry. A CEM V blended cement containing pulverised fly ash (PFA) and blastfurnace slag (BFS) has been studied in or[...]
Article : texte imprimé
Article : texte imprimé
Laetitia Martinie, Auteur ;
Pierre Rossi, Auteur ;
Nicolas Roussel, Auteur
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In this paper, the effect of rigid straight fibers on the yield stress of cementitious materials is studied. A simple model describing the contact network between rigid fibers inside the material is first derived from the physical phenomena invo[...]
Article : texte imprimé
Jean-Yves Petit, Auteur ;
Eric Wirquina, Auteur
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The influence of pressure on the yield stress and plastic viscosity of SCC mortars was investigated using an adapted Marsh cone with cylindrical shear paddles. Nine mortars proportioned with various limestone filler content and high-range water-[...]
Article : texte imprimé
J. Pourchez, Auteur ;
B. Ruot, Auteur ;
J. Debayle, Auteur
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This paper evaluates and compares the impact of cellulose ethers (CE) on water transport and porous structure of cement-based materials in both fresh and hardened state. Investigations of the porous network (mercury intrusion porosimetry, appare[...]
Article : texte imprimé
Baohong Guan, Auteur ;
Qingqing Ye, Auteur ;
Jiali Zhang, Auteur
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Superplasticizers (SPs), namely sulfonated melamine formaldehyde (SMF) and polycarboxylate (PC), were independently admixed with α-calcium sulfate hemihydrate based plaster to improve the material's performance. SMF and PC gave, respectively, 38[...]
Article : texte imprimé
Zhenhua Sun, Auteur ;
George W. Scherer, Auteur
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By combining calorimetric measurements with dilatometry, it has been possible to calculate the contributions of thermal expansion, pore pressure, and crystallization pressure of ice to the strain observed in a mortar during freezing/thawing cycl[...]
Article : texte imprimé
Thomas Rougelot, Auteur ;
Nicolas Burlion, Auteur ;
Dominique Bernard, Auteur
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Chemical shock of cement based materials leads to significant degradation of their physical properties. A typical scenario is a calcium leaching due to water (water with very low pH compared with that of pore fluid). The main objective of this p[...]
Article : texte imprimé
Paulo H.R. Borges, Auteur ;
Juliana O. Costa, Auteur ;
Neil B. Milestone, Auteur
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3:1 BFS:OPC, 9:1 BFS:OPC and 9:1 alkali activated BFS:OPC pastes cured at 20 °C and 60 °C for 90 days were submitted to accelerated carbonation under 5% CO2, 60% relative humidity and 25 ± 5 °C for 21 days. TGA/DTG was used to quantify the amoun[...]
Article : texte imprimé
Ma. Guadalupe D. Gutiérrez-Padilla, Auteur ;
Angela Bielefeldt, Auteur ;
Serguei Ovtchinnikov, Auteur
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Laboratory experiments were conducted to compare the degradation of low and high quality concrete under conditions simulating sewer pipes with and without bacteria. Small concrete samples were exposed to hydrogen sulfide, multiple species of bac[...]
Article : texte imprimé
Seung-Woo Pack, Auteur ;
Min-Sun Jung, Auteur ;
Ha-Won Song, Auteur
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A survey of 11 concrete bridges located in a marine environment at 0.65–48.65 years was examined in terms of chloride transport. As a result, the apparent diffusion coefficient (D) and the surface chloride concentration (CS) are time dependent; [...]
Article : texte imprimé
M. Hunger, Auteur ;
G. Hüsken, Auteur ;
H. J. H. Brouwers, Auteur
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Indoor as well as outdoor air quality and their limiting values remain a major problem to our present-day society.
This paper addresses the modeling of the decomposition process of nitrogen monoxide (NO) on reactive concrete surfaces under th[...]
Article : texte imprimé
P. Forquin, Auteur ;
K. Safa, Auteur ;
G. Gary, Auteur
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The behaviour of concrete under high pressure and dynamic loadings is experimentally investigated in the present paper. The specimen is confined in a cylindrical elastic steel ring that insures a quasi-uniaxial strain state of loading. It is sub[...]
Article : texte imprimé
Daniel L. Y. Kong, Auteur ;
Jay G. Sanjayan, Auteur
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Geopolymers are generally believed to provide good fire resistance due to their ceramic-like properties. Previous experimental studies on geopolymer under elevated temperatures have mainly focused on metakaolin-based geopolymers. This paper pres[...]
Article : texte imprimé
P. Antonaci, Auteur ;
C. L. E. Bruno, Auteur ;
P. G. Bocca, Auteur
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The presence of discontinuity surfaces in concrete structures, i.e. two or more layers in contact, may be an existing situation with evident relapses on damage formation and progression. Differences occur depending on the type of discontinuity, [...]
Article : texte imprimé
Bo Xu, Auteur ;
Houssam A. Toutanji, Auteur ;
John Gilbert, Auteur
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Poly(vinyl butyral) (PVB) which has many special engineering aggregate properties such as super lightweight, physical toughness, adhesion to a variety of surfaces and energy-absorbing characteristics is utilized as the sole aggregate in this stu[...]
Article : texte imprimé
F.K. Akthar, Auteur ;
J.R.G. Evans, Auteur
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High porosity foams based on Portland limestone cement or gypsum plaster were prepared by a simple method of stirring and drying using low levels of the food additives: methyl cellulose and iota carageenan gum. Thermal conductivity of 0.11 W m− [...]
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