Cement and concrete research, Vol. 40 N° 5. Cement and concrete research - Mai 2010
| Titre : | Cement and concrete research, Vol. 40 N° 5. Cement and concrete research - Mai 2010 |
| Type de document : | Bulletin |
| Paru le : | 17/09/2012 |
Dépouillements
Article : texte imprimé
Hassan Sleiman, Auteur ;
Arnaud Perrot, Auteur ;
Sofiane Amziane, Auteur
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The Vicat test is a standard test for measuring the setting times of cement paste and mortar. The physical background of the test is based on the resistance of a paste to dynamic penetration by a rod with a certain weight and shape (shear strain[...]
Article : texte imprimé
T. C. Chen, Auteur
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A novel experimental technique, Cure Reference Method (CRM), was developed for the measurement of surface shrinkage in cementitious materials. The technique combines the replication of diffraction grating on a specimen during the curing process [...]
Article : texte imprimé
J. Plank, Auteur ;
B. Sachsenhauser, Auteur ;
J. de Reese, Auteur
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For adsorption of three different allylether-based PCE superplasticizers on CaCO3 surface, the thermodynamic parameters ΔH, ΔS and ΔG were determined experimentally. The GIBBS standard free energy of adsorption ΔG0ads, the standard enthalpy of a[...]
Article : texte imprimé
Article : texte imprimé
W. Chen, Auteur ;
H. J. H. Brouwers, Auteur
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The alkali-binding capacity of C–S–H in hydrated Portland cement pastes is addressed in this study. The amount of bound alkalis in C–S–H is computed based on the alkali partition theories firstly proposed by Taylor (1987) and later further devel[...]
Article : texte imprimé
Much of the twentieth century's built heritage is made of concrete, which is particularly susceptible to graffiti “attacks”. Since the traditional methods used to remove spray paint are not particularly effective on this type of material, the ad[...]
Article : texte imprimé
Eight different portland cements were imaged on a synchrotron beam line at Brookhaven National Laboratory using X-ray microcomputed tomography at a voxel size of about 1 µm per cubic voxel edge. The particles ranged in size roughly between 10 µm[...]
Article : texte imprimé
Sun, Juanzhen, Auteur ;
George W. Scherer, Auteur
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The pore structure of mortar (w/c = 0.55) was examined using thermoporometry (TPM), nitrogen adsorption/desorption (NAD), and mercury intrusion porosimetry (MIP). The TPM measurements were calibrated by comparison to NAD and MIP measurements on [...]
Article : texte imprimé
Based on the gathered experimental data concerning adsorption/desorption processes in cement mortar, it has been stated that the rate of these processes changes in time even if they proceed in stable conditions. In this paper an attempt is made [...]
Article : texte imprimé
Thomas Matschei, Auteur ;
Fredrik P. Glasser, Auteur
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Thermodynamic calculations disclose that significant changes of the AFm and AFt phases and amount of Ca(OH)2 occur between 0 and 40 °C; the changes are affected by added calcite. Hydrogarnet, C3AH6, is destabilised at low carbonate contents and/[...]
Article : texte imprimé
This paper aims to characterize spray-dried DWTP sludge and evaluate its possible use as an addition for the cement industry. It describes the physical, chemical and micro-structural characterization of the sludge as well as the effect of its ad[...]
Article : texte imprimé
The compressive strengths and structures of composites of aluminosilicate geopolymer with the synthetic cement minerals C3S, β-C2S, C3A and commercial OPC were investigated. All the composites showed lower strengths than the geopolymer and OPC p[...]
Article : texte imprimé
This paper presents details of an original crack-closure system for cementitious materials using shrinkable polymer tendons. The system involves the incorporation of unbonded pre-oriented polymer tendons in cementitious beams. Crack closure is a[...]
Article : texte imprimé
The inclusion of small amounts of short fibers has demonstrated to be an effective solution to control cracking due to drying shrinkage of concretes at early ages. The key point of fiber effectiveness is their capacity to sew the crack sides, pr[...]
Article : texte imprimé
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