Cement and concrete research, Vol. 40 N° 3. - Mars 2010
| Titre : | Cement and concrete research, Vol. 40 N° 3. - Mars 2010 |
| Type de document : | Bulletin |
| Paru le : | 16/09/2012 |
Dépouillements
Article : texte imprimé
Belite sulfoaluminate (BSA) cements have been proposed as environmentally friendly building materials, as their production may release up to 35% less CO2 into the atmosphere when compared to ordinary Portland cements. Here, we discuss the labora[...]
Article : texte imprimé
G. Renaudin, Auteur ;
Y. Filinchuk, Auteur
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Two different techniques were used to compare structural characteristics of “wet” ettringite (stored in the synthesis mother liquid) and “dried” ettringite (dried to 35% relative humidity over saturated CaCl2 solution). Lattice parameters and th[...]
Article : texte imprimé
K. Baltakys, Auteur ;
R. Siauciunas, Auteur
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The influence of gypsum additive on the gyrolite formation process and a sequence of intermediary compounds formation in the CaO–SiO2·nH2O–H2O system was examined and explained. The synthesis has been carried out in unstirred suspensions. The mo[...]
Article : texte imprimé
Nathan A. Tregge, Auteur ;
Margaret E. Pakula, Auteur
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The fresh state of concrete is becoming increasingly important in furthering the types of applications of today's construction world. Processing techniques have resulted in technologies such as self-consolidating concrete and depend on the micro[...]
Article : texte imprimé
D. Heinza M. Göbel, Auteur ;
H. Hilbig, Auteur
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The investigations focused on the dissolution behaviour of fly ash in alkaline solution and the effect of triethanolamine (TEA) addition. TEA is known as a grinding aid in cement production and is an Al and Fe chelating agent. To determine the e[...]
Article : texte imprimé
B. Uzal, Auteur ;
L. Turanlı, Auteur
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Pozzolanic activity of clinoptilolite, the most common natural zeolite mineral, was studied in comparison to silica fume, fly ash and a non-zeolitic natural pozzolan. Chemical, mineralogical and physical characterizations of the materials were c[...]
Article : texte imprimé
Peter A. Claisse, Auteur ;
Hanaa I. Elsayad, Auteur ;
Esmaiel Ganjiana, Auteur
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A computer model has been written to simulate the Rapid Chloride Permeability Test (RCPT) described in ASTM C1202. The model represents the key processes of diffusion and electromigration using standard equations but then maintains charge neutra[...]
Article : texte imprimé
S. U. Balouch, Auteur ;
J.P. Forth, Auteur
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Corrosion of SFRC (Steel Fibre Reinforced Concrete) in an adverse environment, less harmful as compared to corrosion of steel reinforced concrete, is often considered to be of minor importance, however it exists. It can affect the fibres bridgin[...]
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This paper deals with the evolution of the corrosion pattern based on two beams corroded by 14 years (beam B1CL1) and 23 years (beam B2CL1) of conservation in a chloride environment. The experimental results indicate that, at the cracking initia[...]
Article : texte imprimé
A. Poursaee, Auteur ;
A. Laurent, Auteur ;
C.M. Hansson, Auteur
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In North America, corrosion of the steel rebar commonly occurs due to chloride attack from deicing salts. In Canada, based on the severity and temperature of the ambient environment, three different deicing salts, or combination of them, are use[...]
Article : texte imprimé
The threshold chloride concentration for stainless steels activation in concrete environments depends not only on chemical composition of the steel and on pH level of concrete pore solution but is also considerably affected by the superficial st[...]
Article : texte imprimé
Liwu Mo, Auteur ;
Min Deng, Auteur ;
Mingshu Tang, Auteur
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Previous research indicated that the expansion property of MgO-type expansive agent (MEA) depended strongly on the calcining conditions, i.e. kiln temperature and residence time. However, the intrinsic effect of calcination condition on the expa[...]
Article : texte imprimé
The restoration and maintenance of old renders is one of the key aspects of correct rehabilitation practice. The ideal course of action is to replace the damaged material by a material with compatible characteristics. This work aims to analyze t[...]
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N.C. Collier, Auteur ;
N.B. Milestone, Auteur
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A range of magnesium hydroxide waste sludges arising from the re-processing of nuclear fuel exist in the UK and require safe long-term disposal. Similar wastes undergo a cementation process in order to immobilise radioactive material prior to di[...]
Article : texte imprimé
V.F. Pasa Dutra, Auteur ;
S. Maghous, Auteur
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Some aspects of the constitutive behavior of fiber reinforced concrete (FRC) are investigated within a micromechanical framework. Special emphasis is put on the prediction of creep of such materials. The linear elastic behavior is first examined[...]
Article : texte imprimé
Cédric Payan, Auteur ;
Garnier, Bernard, Auteur ;
Joseph Moysan, Auteur
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Nonlinear interaction of a monochromatic elastic wave with a low frequency should be a good tool for non-destructive evaluation of existing concrete structures. Nonlinear indicators have already proved efficient in detecting global damage by exh[...]
Article : texte imprimé
Spalling at high temperature is a phenomenon that can be observed in different materials such as ceramics, rocks and bricks. For concrete, this phenomenon, considered as a thermal instability of the material, can seriously jeopardize the integri[...]
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This paper presents an experimental study on the properties of self-compacting concrete (SCC) subjected to high temperature. Two SCC mixtures and one vibrated concrete mixture were tested. These concrete mixtures come from the French National Pr[...]
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John Jy-An Wang, Auteur ;
Ken C. Liu Dan Naus, Auteur
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The Spiral Notch Torsion Test (SNTT) determines the intrinsic fracture toughness (KIC) of structural materials by applying pure torsion to cylindrical specimens having a notch line that spirals around the specimen at a 45° pitch. KIC values are [...]
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