Les Inscriptions à la Bibliothèque sont ouvertes en
ligne via le site: https://biblio.enp.edu.dz
Les Réinscriptions se font à :
• La Bibliothèque Annexe pour les étudiants en
2ème Année CPST
• La Bibliothèque Centrale pour les étudiants en Spécialités
A partir de cette page vous pouvez :
Retourner à l'écran de résultat de la dernière recherche | Consulter l'historique des recherches | Retourner au premier écran avec les recherches... |
Détail de l'indexation
691 : Matériaux de construction. Pièces et parties composantes
Ouvrages de la bibliothèque en indexation 691
Affiner la recherchePrediction of time dependent chloride transport in concrete structures exposed to a marine environment / Seung-Woo Pack in Cement and concrete research, Vol. 40 N° 2 (02 ex.) (Fevrier 2010)
[article]
in Cement and concrete research > Vol. 40 N° 2 (02 ex.) (Fevrier 2010) . - pp. 302-312
Titre : Prediction of time dependent chloride transport in concrete structures exposed to a marine environment Type de document : texte imprimé Auteurs : Seung-Woo Pack, Auteur ; Min-Sun Jung, Auteur ; Ha-Won Song, Auteur Année de publication : 2010 Article en page(s) : pp. 302-312 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Chloride Diffusion Portland cement Granulated blast-furnace slag Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : 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; the D exponentially decreased with time and the CS increased in the form of a logarithm function to time. Using these data, governing equations for the D and CS were derived to predict the chloride transport in a long term. The time dependent model indicated the higher chloride ingresses in ordinary Portland cement (OPC) concrete than the time independent model, due to a build-up of the CS with time, but ground granulated blast furnace slag (GGBS) concrete indicated a similar range of the chloride ingresses, due to the rapid decrease in the D. To ensure the accuracy of the model that the present study suggested, the fitted model was compared to the well known model of the LIFE 365 together with a chloride profile obtained from an in-situ examination. Then it was found that the model in the present study well predicted the rate of chloride transport, while the LIFE 365 indicated a poor description of the chloride ingress in a long term, due to a constant CS and an overwhelming rapid decrease in the D.
DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XHJX8K-2&_user=6 [...] [article] Prediction of time dependent chloride transport in concrete structures exposed to a marine environment [texte imprimé] / Seung-Woo Pack, Auteur ; Min-Sun Jung, Auteur ; Ha-Won Song, Auteur . - 2010 . - pp. 302-312.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 40 N° 2 (02 ex.) (Fevrier 2010) . - pp. 302-312
Mots-clés : Chloride Diffusion Portland cement Granulated blast-furnace slag Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : 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; the D exponentially decreased with time and the CS increased in the form of a logarithm function to time. Using these data, governing equations for the D and CS were derived to predict the chloride transport in a long term. The time dependent model indicated the higher chloride ingresses in ordinary Portland cement (OPC) concrete than the time independent model, due to a build-up of the CS with time, but ground granulated blast furnace slag (GGBS) concrete indicated a similar range of the chloride ingresses, due to the rapid decrease in the D. To ensure the accuracy of the model that the present study suggested, the fitted model was compared to the well known model of the LIFE 365 together with a chloride profile obtained from an in-situ examination. Then it was found that the model in the present study well predicted the rate of chloride transport, while the LIFE 365 indicated a poor description of the chloride ingress in a long term, due to a constant CS and an overwhelming rapid decrease in the D.
DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4XHJX8K-2&_user=6 [...] Processing of electron microprobe data from the analysis of altered cementitious materials / A. Bertron in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009)
[article]
in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 929–935
Titre : Processing of electron microprobe data from the analysis of altered cementitious materials Type de document : texte imprimé Auteurs : A. Bertron, Auteur ; G. Escadeillas, Auteur ; P. de Parseval, Auteur Année de publication : 2009 Article en page(s) : pp. 929–935 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Cement paste; Degradation; Electron microprobe Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The purpose of this paper is to present a method for processing electron microprobe data coming from the analysis of degraded cementitious materials. The application domain is that of cement matrices exposed to attack by aggressive media inducing the leaching of one or more chemical elements from the cement paste — typically attacked by neutral or acid aqueous environments. As raw data obtained from electron probe microanalysis (EPMA) come in the form of relative quantities of elements, the aim of the processing is to obtain the absolute variation of the specimen's chemical composition in the degraded zone and consequently to allow a better understanding of the degradation mechanisms by the aggressive environment under consideration. This method was designed for degraded specimens in which the porosity was not filled with resin before the EPMA. The method uses the titanium content of the cement matrix as a control, this element being stable during attack by neutral or acidic media. The method is described in detail using the example of the attack of cement pastes by a mix of several organic acids (notably acetic acid) at pH 4. The use of EPMA for sound and altered cement pastes is also validated. The application domain of the correction method is discussed. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001410 [article] Processing of electron microprobe data from the analysis of altered cementitious materials [texte imprimé] / A. Bertron, Auteur ; G. Escadeillas, Auteur ; P. de Parseval, Auteur . - 2009 . - pp. 929–935.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 929–935
Mots-clés : Cement paste; Degradation; Electron microprobe Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The purpose of this paper is to present a method for processing electron microprobe data coming from the analysis of degraded cementitious materials. The application domain is that of cement matrices exposed to attack by aggressive media inducing the leaching of one or more chemical elements from the cement paste — typically attacked by neutral or acid aqueous environments. As raw data obtained from electron probe microanalysis (EPMA) come in the form of relative quantities of elements, the aim of the processing is to obtain the absolute variation of the specimen's chemical composition in the degraded zone and consequently to allow a better understanding of the degradation mechanisms by the aggressive environment under consideration. This method was designed for degraded specimens in which the porosity was not filled with resin before the EPMA. The method uses the titanium content of the cement matrix as a control, this element being stable during attack by neutral or acidic media. The method is described in detail using the example of the attack of cement pastes by a mix of several organic acids (notably acetic acid) at pH 4. The use of EPMA for sound and altered cement pastes is also validated. The application domain of the correction method is discussed. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001410 Quantitative determination of anhydrite III from dehydrated gypsum by XRD / Sebastian Seufert in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009)
[article]
in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 936–941
Titre : Quantitative determination of anhydrite III from dehydrated gypsum by XRD Type de document : texte imprimé Auteurs : Sebastian Seufert, Auteur ; C. Hesse, Auteur ; F. Goetz-Neunhoeffer, Auteur Année de publication : 2009 Article en page(s) : pp. 936–941 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Portland cement; Hydration; X-ray diffraction characterization;Calcium sulfate Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Technical OPC contains mixed sulfate carriers in varying amounts. Gypsum and anhydrite are added to the clinker during the milling process where the gypsum dehydrates partially to bassanite and anhydrite. Due to different hydration kinetics of these phases, it is crucial to be able to characterize the composition of sulfate in a cement system to reach an optimal and reproducible cement hydration. In the current paper different calcium sulfate compositions are investigated by XRD methods in order to identify phase content. Special focus is put on the discrimination of the hemihydrate (bassanite) and anhydrite III as well as on transformation processes of anhydrite III through ambient humidity. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001483 [article] Quantitative determination of anhydrite III from dehydrated gypsum by XRD [texte imprimé] / Sebastian Seufert, Auteur ; C. Hesse, Auteur ; F. Goetz-Neunhoeffer, Auteur . - 2009 . - pp. 936–941.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 936–941
Mots-clés : Portland cement; Hydration; X-ray diffraction characterization;Calcium sulfate Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Technical OPC contains mixed sulfate carriers in varying amounts. Gypsum and anhydrite are added to the clinker during the milling process where the gypsum dehydrates partially to bassanite and anhydrite. Due to different hydration kinetics of these phases, it is crucial to be able to characterize the composition of sulfate in a cement system to reach an optimal and reproducible cement hydration. In the current paper different calcium sulfate compositions are investigated by XRD methods in order to identify phase content. Special focus is put on the discrimination of the hemihydrate (bassanite) and anhydrite III as well as on transformation processes of anhydrite III through ambient humidity. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001483 Re-examining the prospects of aluminous cements based on alkali-earth and rare-earth oxides / A. K. Chatterjee in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009)
[article]
in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 981-988
Titre : Re-examining the prospects of aluminous cements based on alkali-earth and rare-earth oxides Type de document : texte imprimé Auteurs : A. K. Chatterjee, Auteur Année de publication : 2010 Article en page(s) : pp. 981-988 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : BaO;Calcium aluminate cement; Refractory cement; Strontium compounds Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : In the family of aluminous cements the potential of strontium aluminate, the strontium–barium aluminate and the barium aluminate cements have been sporadically and incoherently studied over several decades in various parts of the world and more particularly in the East European countries without much wide-spread commercial success. Attempts had also been made to extend the exploratory studies to the (Ca, Sr, Ba)O–Al2O3–ZrO2–HfO2 system to synthesize super-refractory binders.
In fact, the above compositions, prima facie, seem to have the potential of arriving at cementitious formulations that, apart from being super-refractory, may as well be highly resistant to seawater, X-rays and gamma radiation.
Looking at these potentials, quite a few experimental studies have been carried out under the guidance and supervision of the present author. The present paper is an endeavour to collate the data on some of these systems both from the published literature as well as from the author's findings. The prime motive has been to review and re-assess the prospects of manufacturing a range of new aluminous binders with superior properties.DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002002 [article] Re-examining the prospects of aluminous cements based on alkali-earth and rare-earth oxides [texte imprimé] / A. K. Chatterjee, Auteur . - 2010 . - pp. 981-988.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 981-988
Mots-clés : BaO;Calcium aluminate cement; Refractory cement; Strontium compounds Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : In the family of aluminous cements the potential of strontium aluminate, the strontium–barium aluminate and the barium aluminate cements have been sporadically and incoherently studied over several decades in various parts of the world and more particularly in the East European countries without much wide-spread commercial success. Attempts had also been made to extend the exploratory studies to the (Ca, Sr, Ba)O–Al2O3–ZrO2–HfO2 system to synthesize super-refractory binders.
In fact, the above compositions, prima facie, seem to have the potential of arriving at cementitious formulations that, apart from being super-refractory, may as well be highly resistant to seawater, X-rays and gamma radiation.
Looking at these potentials, quite a few experimental studies have been carried out under the guidance and supervision of the present author. The present paper is an endeavour to collate the data on some of these systems both from the published literature as well as from the author's findings. The prime motive has been to review and re-assess the prospects of manufacturing a range of new aluminous binders with superior properties.DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002002 Reinforcement corrosion initiation and activation times in concrete structures exposed to severe marine environments / R.E. Melchers in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009)
[article]
in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1068–1076
Titre : Reinforcement corrosion initiation and activation times in concrete structures exposed to severe marine environments Type de document : texte imprimé Auteurs : R.E. Melchers, Auteur ; C. Q. Li, Auteur Année de publication : 2010 Article en page(s) : pp. 1068–1076 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Corrosion; Long-term performance; Chloride; Reinforcement Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The corrosion of steel reinforcement bars in reinforced concrete structures exposed to severe marine environments usually is attributed to the aggressive nature of chloride ions. In some cases in practice corrosion has been observed to commence already within a few years of exposure even with considerable concrete cover to the reinforcement and apparently high quality concretes. However, there are a number of other cases in practice for which corrosion initiation took much longer, even in cases with quite modest concrete cover and modest concrete quality. Many of these structures show satisfactory long-term structural performance, despite having high levels of localized chloride concentrations at the reinforcement. This disparity was noted already more than 50 years ago, but appears still not fully explained. This paper presents a systematic overview of cases reported in the engineering and corrosion literature and considers possible reasons for these differences. Consistent with observations by others, the data show that concretes made from blast furnace cements have better corrosion durability properties. The data also strongly suggest that concretes made with limestone or non-reactive dolomite aggregates or sufficiently high levels of other forms of calcium carbonates have favourable reinforcement corrosion properties. Both corrosion initiation and the onset of significant damage are delayed. Some possible reasons for this are explored briefly. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S000888460900163X [article] Reinforcement corrosion initiation and activation times in concrete structures exposed to severe marine environments [texte imprimé] / R.E. Melchers, Auteur ; C. Q. Li, Auteur . - 2010 . - pp. 1068–1076.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1068–1076
Mots-clés : Corrosion; Long-term performance; Chloride; Reinforcement Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The corrosion of steel reinforcement bars in reinforced concrete structures exposed to severe marine environments usually is attributed to the aggressive nature of chloride ions. In some cases in practice corrosion has been observed to commence already within a few years of exposure even with considerable concrete cover to the reinforcement and apparently high quality concretes. However, there are a number of other cases in practice for which corrosion initiation took much longer, even in cases with quite modest concrete cover and modest concrete quality. Many of these structures show satisfactory long-term structural performance, despite having high levels of localized chloride concentrations at the reinforcement. This disparity was noted already more than 50 years ago, but appears still not fully explained. This paper presents a systematic overview of cases reported in the engineering and corrosion literature and considers possible reasons for these differences. Consistent with observations by others, the data show that concretes made from blast furnace cements have better corrosion durability properties. The data also strongly suggest that concretes made with limestone or non-reactive dolomite aggregates or sufficiently high levels of other forms of calcium carbonates have favourable reinforcement corrosion properties. Both corrosion initiation and the onset of significant damage are delayed. Some possible reasons for this are explored briefly. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S000888460900163X Revealing the temperature history in concrete after fire exposure by microscopic analysis / E. Annerel in Cement and concrete research, Vol. 39 N° 12 (Décembre 2009)
PermalinkRheology of fiber reinforced cementitious materials / Laetitia Martinie in Cement and concrete research, Vol. 40 N° 2 (02 ex.) (Fevrier 2010)
PermalinkSelf-consolidating concrete subjected to high temperature: Mechanical and physicochemical properties / Hanaa Fares in Cement and concrete research, Vol. 39 N° 12 (Décembre 2009)
PermalinkSome aspects of cellulose ethers influence on water transport and porous structure of cement-based materials / J. Pourchez in Cement and concrete research, Vol. 40 N° 2 (02 ex.) (Fevrier 2010)
PermalinkSteady state flow of cement suspensions / Nicolas Roussel in Cement and concrete research, Vol. 40 N° 1 (Janvier 2010)
PermalinkStudy of ion cluster reorientation process of geopolymerisation reaction using semi-empirical AM1 calculations / Zhang Yunsheng in Cement and concrete research, Vol. 39 N° 12 (Décembre 2009)
PermalinkStudying nucleation and growth kinetics of alite hydration using μic / Shashank Bishnoi in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009)
PermalinkSynthesis of pure Portland cement phases / A. Wesselsky in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009)
PermalinkTemperature dependence of the sorption isotherms of cement-based materials: Heat of sorption and Clausius–Clapeyron formula / Stéphane Poyet in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009)
PermalinkThe corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment / Ruijin Zhang in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009)
Permalink