Relevant bibliographies by topics / Mortier Porosité

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Mortier Porosité'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Mortier Porosité"

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Bur, N., S. Roux, L. Delmas, Y. Géraud, and F. Feugeas. "Porosité des mortiers et bioréceptivité." Matériaux & Techniques 98, no. 1 (December 3, 2009): 31–40. http://dx.doi.org/10.1051/mattech/2009047.

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Shi-Ping, Jiang, and J. Grandet. "Evolution comparee des porosites des mortiers de ciment au laitier et des mortiers de ciment portland." Cement and Concrete Research 19, no. 3 (May 1989): 487–96. http://dx.doi.org/10.1016/0008-8846(89)90037-9.

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Lee, Jae Ik, Byung Wan Jo, Yeong Seok Yoo, and Kyeong Ho Cheon. "An Experimental Study of the Characteristics of Environment-Friendly Construction Materials by Recycling Sewage Sludge Ash." Materials Science Forum 569 (January 2008): 297–300. http://dx.doi.org/10.4028/www.scientific.net/msf.569.297.

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As a basic stage for developing new construction material utilizing sewage sludge ash, this study is identified by specific material characteristics through XRD, SEM, uniaxial compressive strength, porosity, and the drying shrinkage by manufacturing mortar with sewage sludge ash. The average drying shrinkage of sewage sludge ash mortar aged 7 days showed 88% of the strain of the one aged 28 days. The porosity of sewage sludge ash mortar was about 7~10%. The more quick lime and blast furnace slag were added, the less porosity appeared.
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Zhou, Renzhan, Qiang Li, Jiandong Wang, Kewen Zhou, Rui He, and Chuanqing Fu. "Assessment of Electrical Resistivity and Oxygen Diffusion Coefficient of Cementitious Materials from Microstructure Features." Materials 14, no. 12 (June 8, 2021): 3141. http://dx.doi.org/10.3390/ma14123141.

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A newly proposed modified non-contact electrical resistivity measurement was used to test the resistivity of concrete and cement mortar. The oxygen diffusion coefficients of concrete and mortar were determined by a gas diffusion measurement, and the capillary porosity of concrete and cement mortar was measured by mercury intrusion porosimetry (MIP) measurement. The obtained electrical resistivity and capillary porosity results were verified with other researchers’ data, the measured electrical resistivity results can be estimated by a simple equation from the capillary porosity results. The obtained oxygen diffusion coefficient results were quantitatively correlated with capillary porosity and electrical resistivity measurement results. The proposed equations can be practically used to assess the electrical resistivity and oxygen diffusion coefficient.
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Gu, Ya Min, and Yong Hao Fang. "Durability of Alkali-Activated Slag Cement in Seawater Environment." Advanced Materials Research 450-451 (January 2012): 778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.778.

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The durability of alkali-activated slag mortar in seawater environment, compared with that of ordinary portland cement mortar, was studied by drying-wetting test in accelerated laboratory seawater. The drying-wetting resistance, porosity, performance mechanism, and depth of chloride ingress were analyzed. The results show the mechanical properties of the AAS mortars were improved after 40 cycles, opposite to that of the OPC mortar, which is mostly due to the difference of porosity and pore structure. The chloride penetration resistance of AAS mortar was better, comparing to conventional OPC mortar.
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Gao, Zhifei, Linbing Wang, and Hailu Yang. "Investigation of the Residual Mechanical and Porosity Properties of Cement Mortar under Axial Stress during Heating." Materials 14, no. 8 (April 13, 2021): 1944. http://dx.doi.org/10.3390/ma14081944.

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The preload load on concrete during heating is considered to cause a ‘densification’ of cement mortar which led to the increased compressive strength. In order to assess the influence of coupled load and heating effects on porosity characteristics of concrete, the porosity of mortar after mechanical and thermal loading was measured by X-ray computed tomography (X-ray CT). The preload at pre-stress ratios of 0, 0.2, 0.4, and 0.6 (ratio of stress applied to the specimen to its compressive strength at room temperature) were applied on mortar specimens during heating. The residual compressive strengths of the heated and stressed mortar specimens were tested after cooling to room temperature. Combined analyses of the residual compressive strength test results and porosity test results, it shows that the porosity of the specimens under the coupled stressing and heating conditions were slightly lower than that under the unstressed conditions; however, the conclusion that the increase of compressive strength of stressed mortar was caused by the ‘densification’ of cement paste was insufficient. The preload reduced the cracks in the mortar, especially the crack induced due to the thermal mismatch in aggregates and hardened cement paste (HCP), and this may account for the increased compressive strength of stressed mortar.
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Ahmad, Muhammad Munsif, Fauziah Ahmad, Mastura Azmi, and Mohd Zulham Affandi Mohd Zahid. "Properties of Cement Mortar Consisting Raw Rice Husk." Applied Mechanics and Materials 802 (October 2015): 267–71. http://dx.doi.org/10.4028/www.scientific.net/amm.802.267.

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Most of the rice husk is disposed with no further concern and this has caused waste disposal problems. Burning rice husk can cause health and environmental problem. Rice husk ash has been widely used for concrete technology application as additive in concrete mixture. However there is lack of study on the usage of raw rice husk. This paper presents the experimental on the properties of cement mortar consisting raw rice husk which focused on the porosity and density. Specimens were prepared by incorporating different percentage of rice husk with mortar. Summation of 10 mixes has been investigated to determine the compressive strength, density, porosity and water absorption. As the main purpose of the rice husk cement mortar is for drainage material, the main characteristics needed are porosity and lightweight. From the results, it is concluded that the higher percentage of rice husk used, will decreased the compressive strength and density and increased the porosity of rice husk cement mortar.
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Usman, Jamilu, Abdul Rahman Mohd Sam, and Salihuddin Radin Sumadi. "Strength and Porosity of Cement Mortar Blended with Metakaolin." Advanced Materials Research 838-841 (November 2013): 142–47. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.142.

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An experimental investigation was carried out to assess the effect of metakaolin (MK) on the compressive strength, flexural strength and porosity of cement mortar. The cement was partially substituted with MK at 0-30% replacement levels. The results show that the strengths and porosity of mortar containing up to 20% were superior to that of control (0% MK). The Balshin equation fits the experimental results of compressive strength and porosity of the specimens containing MK and there is a strong quantitative relationship between compressive strength and porosity of the specimens.
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Wei Chong, Beng, Rokiah Othman, Ramadhansyah Putra Jaya, Doh Shu Ing, Xiaofeng Li, Mohd Haziman Wan Ibrahim, Mohd Mustafa Al Bakri Abdullah, et al. "Image Analysis of Surface Porosity Mortar Containing Processed Spent Bleaching Earth." Materials 14, no. 7 (March 28, 2021): 1658. http://dx.doi.org/10.3390/ma14071658.

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Image analysis techniques are gaining popularity in the studies of civil engineering materials. However, the current established image analysis methods often require advanced machinery and strict image acquisition procedures which may be challenging in actual construction practices. In this study, we develop a simplified image analysis technique that uses images with only a digital camera and does not have a strict image acquisition regime. Mortar with 10%, 20%, 30%, and 40% pozzolanic material as cement replacement are prepared for the study. The properties of mortar are evaluated with flow table test, compressive strength test, water absorption test, and surface porosity based on the proposed image analysis technique. The experimental results show that mortar specimens with 20% processed spent bleaching earth (PSBE) achieve the highest 28-day compressive strength and lowest water absorption. The quantified image analysis results show accurate representation of mortar quality with 20% PSBE mortar having the lowest porosity. The regression analysis found strong correlations between all experimental data and the compressive strength. Hence, the developed technique is verified to be feasible as supplementary mortar properties for the study of mortar with pozzolanic material.
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Hu, Shaowei, Yaoqun Xu, Juan Wang, Peng Zhang, and Jinjun Guo. "Modification Effects of Carbon Nanotube Dispersion on the Mechanical Properties, Pore Structure, and Microstructure of Cement Mortar." Materials 13, no. 5 (March 2, 2020): 1101. http://dx.doi.org/10.3390/ma13051101.

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Carbon nanotubes (CNTs) are very effective in improving the performance of cement-based materials. Mechanical properties and pore structure were investigated for cement mortar with CNTs. Meanwhile, the composite morphology of CNT–cement material and the evolution of hydration products were observed by scanning electron microscope (SEM), and the quantitative relationship between mechanical properties and pore structure was analyzed. The results indicated that the strength of mortar increased with the addition of 0.05% CNTs and decreased when the fraction of CNTs increased to 0.5%. The porosity of mortar with dispersed CNTs increased significantly, as these pores may be introduced by the dispersant. The quantitative relationship between porosity and strength proved that the increased porosity is the reason for the decreased strength of mortar with 0.5% CNT content, while mortar matrix strength with 0.05% and 0.5% CNTs increased by 44.03% and 71.18%, respectively. SEM images show that CNTs are dispersed uniformly in the mortar without obvious agglomeration and that the CNTs and hydration products form a meshwork structure, which is the mechanism by which CNTs can enhance the strength of the cement matrix.
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Dissertations / Theses on the topic "Mortier Porosité"

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Moustachi, Om Elkhaïat. "Influence de la microstructure des mortiers de ciment portland armes de fibres sur leur comportement mecanique en flexion." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0002.

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Analyse des modifications de la structure interne du mortier induites par l'introduction des fibres et determination de leur influence sur les proprietes mecaniques du mortier en flexion. Des fiches en paquets introduites dans le mortier se dispersent lors du malaxage en fibres individuelles espacees de quelques microns. Ces espaces, tres peu accessibles aux particules anhydres du ciment sont partiellement remplis par des hydrates. Ils rendent le mortier tres permeable aux fluides et influent directement sur son module d'elasticite en flexion qui diminue avec le pourcentage de fibres. L'effet d'armature des fibres se traduit par une augmentation de la resistance et de l'allongement a la rupture du mortier. De la fumee de silice dispersee a l'aide d'un fluidifiant reduit la porosite entre les fibres et augmente ainsi le module d'elasticite et sa resistance a la rupture
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Chouicha, Kaddour. "Evolution microstructurale des micro-betons soumis a des chargements cycliques de faible frequence." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0026.

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L'etude de l'evolution de la structure de micro-betons soumis a des changements cycliques de faible frequence permet de souligner qu'a des taux de chargements inferieurs a 50 % de la charge de rupture, l'evolution microstructurale se traduit par un deplacement d'eau lie a un retrecissement des pores couple eventuellement a quelques micro-ruptures dans les interfaces pate de ciment-granulat. Pour des taux de chargement plus eleves, il y a simultanement ecrasement des pores et croissance des microfissures aux interfaces, croissance qui conduirait a la rupture pour un grand nombre de cyclos.
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Hanna, Bassam. "Contribution à l'étude de la structuration des mortiers de ciment portland contenant des particules ultra-fines." Toulouse, INSA, 1987. http://www.theses.fr/1987ISAT0004.

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Etudes de l'influence sur le comportement mecanique des mortiers de six ajouts ultra-fins (trois fumees de silice condensee et trois alumines de synthese), en constatant l'absence d'influence d'une eventuelle reaction pouzzolanique et par contre l'influence du remplissage des porosites
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Tran, Thu Hien. "Influence des caractéristiques intrinsèques d’un mortier sur son encrassement biologique." Thesis, Saint-Etienne, EMSE, 2011. http://www.theses.fr/2011EMSE0626/document.

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L’encrassement biologique des revêtements de façade constitue un problème esthétique et économique. Parmi les microorganismes impliqués, les algues sont les plus répandues. Ce travail avait pour but d’étudier expérimentalement l’influence des paramètres intrinsèques (porosité, rugosité et carbonatation) de mortiers à base de ciment sur leur bioréceptivité et de modéliser le développement du biofilm d’algues.Pour étudier l’effet de ces paramètres sur la biodétérioration des mortiers, un essai accéléré de laboratoire a été développé. Les travaux ont été réalisés avec l’algue verte Klebsormidium flaccidum fréquemment identifiée dans les prélèvements réalisés sur des façades colonisées. Les résultats montrent qu’une augmentation de rugosité et une diminution du pH de surface par carbonatation favorisent l’encrassement des mortiers par les algues.Un modèle inspiré de la loi d’Avrami a permis de modéliser le phénomène de colonisation par les algues. Deux processus interviennent dans le mécanisme de colonisation : l’accrochage (ou « germination ») et la croissance des algues. Les paramètres cinétiques représentant ces processus ont été déterminés et révèlent l’importance de la rugosité et de la carbonatation sur la constante de vitesse de « germination ».L’exposition d’échantillons en extérieur a été également réalisée. Les résultats obtenus permettent de retrouver partiellement le comportement des matériaux en laboratoire même si le démarrage de la colonisation semble être affecté par les conditions climatiques
Biofouling of wall coatings is an aesthetic and economic problem. Among microorganisms involved, the algae are the most involved. This work aimed to study experimentally the influence of intrinsic parameters (porosity, roughness and carbonation) of a cement-based mortar on its bioreceptivity and to model the development of algae.To study the algal biodegradation, an accelerated laboratory test was developed. This work was carried out with the green alga Klebsormidium flaccidum frequently identified in samples taken on colonized facades. The results show that an increase in roughness and a decrease in surface pH by carbonation of mortars promote fouling by algae.A model based on Avrami's law was used to simulate the algal colonization. Two processes involved in the mechanism of colonization: the attachment (or "germination") and the growth of algae. The kinetic parameters representing these processes have been determined and reveal the importance of the roughness and the carbonation on the constant rate of "germination".Exposure of samples in nature was also carried out. The results obtained allow recovering partially the behavior of materials in the laboratory test even if the start of colonization seems to be affected by weather conditions
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JIANG, SHIPING. "Contribution a l'etude des relations entre les proprietes mecaniques et la microstructure des mortiers." Toulouse 3, 1988. http://www.theses.fr/1988TOU30175.

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Etude de trois mortiers de liant hydraulique, considerant: resistance, module d'elasticite, deformabilite et resistance a la propagation de fissure. Caracterisation de la microstructure par porosite capillaire totale, volume des pores de grande dimension (500 a) et rayon hydraulique des pores. Influence du volume des grands pores; relations biunivoques lineaires entre resistance et module, et l'inverse du rayon hydraulique des pores
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Balayssac, Jean-Paul. "Relations entre performances mécaniques, microstructure et durabilité des bétons." Toulouse, INSA, 1992. http://www.theses.fr/1992ISAT0010.

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L'influence des variations du type de ciment (fillerise ou non) et de son dosage sur la microstructure et la durabilite des betons vis-a-vis d'agressions chimiques est etudiee. Apres avoir remarque que les conditions de conservation avant decoffrage, la cure, avaient une influence tres importante sur la durabilite du beton, une quantification de leurs effets est effectuee; elle laisse apparaitre que ces facteurs connus, mais jusqu'ici inconsideres, devront etre pris en compte lors de la creation de nouvelles methodes pour la formulation des betons
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Nguyen, Tien Dung. "Étude de la zone d'interphase " granulats calcaires poreux-pâte de ciment" : Influence des propriétés physico-mécaniques des granulats; Conséquence sur les propriétés mécaniques du mortier." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2013. http://tel.archives-ouvertes.fr/tel-00849595.

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Ce travail vise à mettre en relation les caractéristiques de la zone d'interphase " granulat-pâte de ciment " avec les caractéristiques de porosité, d'absorption d'eau, de dureté et de rugosité de calcaires poreux.La première partie de ce travail a consisté à étudier l'influence de la teneur en eau et de la dureté des granulats sur la résistance mécanique de mortiers. Les résultats montrent que, pour des calcaires poreux et absorbants, les mortiers fabriqués à partir de granulats à l'état sec sont plus résistants que ceux fabriqués à partir de granulats à l'état sursaturé. La deuxième partie de ce travail a consisté à étudier l'adhésion " roche-pâte de ciment ". Il a été constaté que la rugosité et l'état de saturation de la roche affectent significativement les résistances en traction et au cisaillement des composites.La dernière partie est consacrée à l'étude de la microstructure de la zone d'interphase par la technique d'analyse d'images. L'évolution de la porosité moyenne de la zone d'interphase est liée aux propriétés mécaniques des mortiers par la relation de Féret démontrant ainsi que la résistance à la compression dépend principalement de la mésoporosité de l'interphase. Le gradient de porosité est mis en relation avec le gradient de degré d'hydratation et le gradient de rapport E/C. Ces deux derniers sont calculés en appliquant le modèle de Powers. Les résultats obtenus montrent que pour des calcaires poreux et absorbants, la pâte de ciment et la zone d'interphase des mortiers de granulats secs et de granulats sursaturés ne sont pas équivalentes alors qu'initialement on visait le même rapport E/C.
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Bajja, Zineb. "Influence de la microstructure sur le transport diffusif des pâtes, mortiers et bétons à base de CEM I avec ajout de fumée de silice." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN054/document.

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Au regard de son importante résistance mécanique mais surtout de ses capacités de confinement potentielles conférées par une microstructure compacte, le béton s’avère le matériau le plus adapté pour composer la barrière ouvragée de la structure de stockage et l’enrobage de certains déchets radioactifs. La connaissance des propriétés de diffusion et de microstructure de ces matériaux cimentaires sont donc des éléments indispensables à l’étude de leurs durabilités à long terme. Dans un contexte plus particulier de confinement des déchets de faible à moyenne activité, l'utilisation des formulations avec ajout de fumée de silice (FS) s'avère d'une grande importance. La démarche expérimentale consiste d’abord à sélectionner des formulations de pâtes et de mortiers à tester en diffusion HTO. Leurs compositions initiales (rapport e/liant, teneur en FS, teneur en sable et granulométrie du sable) ont été variées de telle façon à balayer des microstructures et des propriétés diffusives différentes, et à voir l’influence de chaque paramètre (eau, FS, teneur et granulométrie du sable) sur l’évolution de la diffusivité au sein de ces matériaux. La microstructure a été investiguée afin d’interpréter les valeurs des coefficients de diffusion obtenus. Différentes techniques complémentaires ont été utilisées pour caractériser cette structure poreuse (porosimétrie à l’eau, au mercure, l’adsorption d’azote,), pour vérifier la réactivité de la FS (ATG, MEB associé à l’EDS), et pour déterminer le profil de porosité au niveau de l’ITZ (MEB associé à l’analyse d’images).Le lien entre les propriétés de la microstructure et le coefficient de diffusion a ensuite été discuté. L’objectif ultime étant de trouver un lien entre les propriétés de la microstructure et les paramètres de transport nous permettant, in fine, à partir d’une simple caractérisation, d’estimer le DeHTO du béton, très difficile à obtenir par l’essai en cellules de diffusion HTO. D’autres tentatives ont également été faites pour essayer d’évaluer ce coefficient de béton, comme la démarche de modélisation multi-échelle (de l’échelle des hydrates au modèle 3D), ou la diffusion d’autres éléments (en l’occurrence ici de gaz O2 et N2).La présente étude montre que des agglomérats de fumée de silice (slurry) observés dans la pâte de ciment et dans le mortier à faible teneur volumique en sable normalisé (ici 10%), impactent les rôles filler et pouzzolanique de la FS et par conséquent les paramètres de durabilité de ces matériaux. Cependant, la présence d’une forte teneur en granulats (>30%) pendant le malaxage du mortier améliore considérablement la dispersion des particules de FS et aide à cisailler et à briser ces agglomérats en fournissant une meilleure homogénéité du mélange et en améliorant les propriétés microstructuraux et diffusionnels. Il a également été montré que l’utilisation de la FS sous forme slurry dans un mélange cimentaire est malgré tout nettement meilleure que la FS densifiée, communément utilisée dans la littérature. Des relations DeHTO et rayon critique, ou DeHTO et porosité accessible au mercure ont était établies et ont permis d’approcher plus ou moins des coefficients de diffusion HTO de bétons avec et sans ajout de FS
Thanks to its high mechanical strength and its potential containment capacity conferred by a compact microstructure, concrete is considered as the most suitable material to compose the engineered barrier of some radioactive waste storage structure. Knowledge of diffusion properties and microstructure of these cementitious materials is then essential to study their long-term durability. In a more specific context of low and intermediate waste management, the use of formulations containing silica fume (SF) appears of great importance. The experimental approach consists in selecting many formulations of pastes and mortars to test by the HTO through-out diffusion test. Their initial compositions (water to binder ratio, SF content, sand content and particle size) were varied in order to browse different microstructures and diffusion properties, and to see the influence of each parameter (water, SF, content and grain size of sand) on the evolution of diffusivity within these materials. The microstructure was investigated to interpret the obtained values of diffusion coefficients. Different complementary techniques have been used to characterize the porous structure (water and mercury intrusion porosimetry, nitrogen adsorption), to verify SF reactivity (TGA, SEM associated to EDS) or to determine the profile porosity at ITZ (SEM combined with image analysis).The relationship between microstructure and diffusion coefficients (DeHTO) was then discussed. The ultimate goal was to find a link between microstructure properties and transport parameters to estimate from a simple characterization, the DeHTO of concrete, difficult to get from HTO diffusion cells test. Other attempts have also been made to try to assess the concrete diffusion coefficient, such as the multi-scale modeling approach (the scale of hydrates 3D model), or the diffusion of other elements ( like oxygen or nitrogen).This study shows that silica fume agglomerates (slurry) observed in cement paste and mortar with low standardized sand content (10%), impact the filler and pozzolanic roles of the SF and therefore sustainability parameters of these materials. On the other side, the presence of high aggregates content (> 30%) during mortar’s mixing greatly improves the dispersion of SF particles and helps shearing these agglomerates by providing better homogeneity of the mixture and enhancing microstructural and diffusional properties. It was also shown that the use of the SF as a slurry form in a cementitious mixture is still significantly better than the use of the densified FS, commonly used in the literature. Relations between the DeHTO and the critical pore radius, or the DeHTO and mercury porosity have been established and helped to estimate more or less the HTO diffusion coefficients of two concretes with or without SF
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Yousfi, Ismail. "Caractérisation de l’endommagement thermique et mécanique dans le mortier par les ondes acoustiques non linéaires." Thesis, Ecole centrale de Lille, 2015. http://www.theses.fr/2015ECLI0009/document.

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L'objectif de ce travail est la caractérisation de l’endommagement thermique et mécanique dans le mortier par les ondes acoustiques non linéaires. La corrélation entre les paramètres acoustiques linéaires et non-linéaires étudiée est basée sur les essais expérimentaux et la modélisation. Pour l’endommagement thermique, des éprouvettes cylindriques ont été préparées et caractérisées par l'étude de la porosité et la saturation. Ensuite, l'acoustique linéaire et l’acoustique non linéaire (génération d'harmoniques) ont été appliquées afin de quantifier l’endommagement. Les essais acoustiques linéaires ont prouvé que les vitesses transversales, longitudinales et le module d'Young du mortier diminue en fonction de la température. Les essais acoustiques non linéaires ont montré l'augmentation du bêta fonction de la température. Pour l’endommagement mécanique, le phénomène d'autocicatrisation est suivi par la perméabilité et les essais acoustiques. Les essais de perméabilité ont montré que le débit d'air et la taille de la fissure diminue rapidement au cours du premier mois, puis lentement durant le reste du processus d'autocicatrisation. D'autre part, les tests acoustiques non linéaires ont montré que « alpha » et « bêta » diminuent durant le processus de l’autocicatrisation qui signifie que les paramètres non linéaires sont un bon indicateur pour caractériser ce phénomène. A partir des résultats expérimentaux, une corrélation polynomiale de 2ème degré a été établie entre les paramètres non linéaires et l’index d’endommagement. Les résultats de ce travail représentent un bon départ pour étudier le phénomène de l'autocicatrisation par les ondes acoustiques non linéaires
The objective of this work is the characterization of heat and mechanical damage in the mortar by the nonlinear acoustic waves. The correlation between non-linear/linear acoustic parameters and damage in mortar is studied based on experiments and modelling. For the heat damage, cylindrical specimens were prepared and were characterized by studying the porosity and saturation. Indeed, the linear acoustic (UPV) and non-linear acoustic (Higher harmonic generation) were applied to characterize the damage. The linear acoustic tests have shown that velocities and modulus of Young of the mortar decreases in function of the temperature. The non-linear acoustic tests have shown that beta increases in function of the temperature.For the mechanical damage. The self-healing phenomenon was characterized by the permeability and the acoustic tests. Indeed, the permeability tests have shown that the airflow and the crack size decreases quickly in the first month then slowly for the rest of the self-healing process. On the other hand, the non-linear acoustic tests shown that the alpha and beta decreases according to the self healing process which means that the nonlinear parameters are a good indicators to characterize the self-healing. Moreover, the analysis of the experimental results indicates that the frequency resonant technique is more efficient to characterize the defects in the mortar than the higher harmonic generation. A polynomial correlations of a 2nd degree was established between the nonlinear parameters and the index damage. The findings of this work should be most appropriate as a foundation for the study of the self healing by the nonlinear acoustic waves
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Yurtdas, Ismail Skoczylas Frédéric Burlion Nicolas. "Couplage comportement mécanique et dessiccation des matériaux à matrice cimentaire étude expérimentale sur mortiers /." [S.l.] : [s.n.], 2003. http://www.univ-lille1.fr/bustl-grisemine/pdf/extheses/50376-2003-217-218.

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Book chapters on the topic "Mortier Porosité"

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Válek, Jan, John Hughes, and Peter Bartos. "Gas Permeability, Porosity and Carbonation of Modern Conservation Lime Mortar Mix." In Materials for Buildings and Structures, 209–15. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527606211.ch30.

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Awoyera, Paul, Ravindran Gobinath, Sandela Haripriya, and Poongodi Kulandaisami. "New Light Weight Mortar for Structural Application: Assessment of Porosity, Strength and Morphology Properties." In Learning and Analytics in Intelligent Systems, 59–65. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-24314-2_9.

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Mukherjee, Shaswata, and Saroj Mondal. "Self-Healing Properties of Conventional and Fly Ash Cementitious Mortar, Exposed to High Temperature." In Emerging Design Solutions in Structural Health Monitoring Systems, 1–11. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8490-4.ch001.

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Direct stress and sub-stress caused by fire, temperature variation and external loading in a structure are most important for the development of cracks. The chemical reactions of natural healing in the matrix was not been established conclusively. The most significant factor that influences the self-healing is the precipitation of calcium carbonate crystals on the crack surface. The mechanism which contribute autogenic healing are: (a) Continued hydration of cement at cracked surface as well as continued hydration of already formed gel and also inter-crystallization of fractured crystals; (b) blocking of flow path by water impurities and concrete particles broken from the crack surface due to cracking; (c) expansion of concrete in the crack flank (swelling) and closing of cracks by spalling of loose concrete particle are also reported as the sealing mechanism by researchers. The recovery of mechanical as well as physical property was discussed by different researchers. An experimental investigation was carried out to study the autogenic healing of fire damaged fly ash and conventional cementitious mortar samples subjected to steam followed by water curing at normal atmospheric pressure. The micro cracks are generated artificially by heating the 28 days aged mortar samples at 800 Deg. C. The effect of fly-ash replacing ordinary Portland cement by 0 and 20% was studied. Recovery of compressive strength and physical properties i.e. apparent porosity, water absorption, ultrasonic pulse velocity and rapid chloride ion penetration test confirm the self-healing of micro cracks. Such healing is more prominent for fly ash mortar mix. Optical as well as scanning electron microscopy With EDAX analysis and X-ray diffraction study of the white crystalline material formed in the crack, confirms formation of calcium carbonate.
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Šajna, A. "INFLUENCE OF POROSITY ON THE FREEZE-THAW SALT RESISTANCE OF HIGH PERFORMANCE MORTAR." In Challenges of Concrete Construction: Volume 6, Concrete for Extreme Conditions, 457–66. Thomas Telford Publishing, 2002. http://dx.doi.org/10.1680/cfec.31784.0044.

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"The effect of volume variation of silver nanoparticle solution towards the porosity and compressive strength of mortar." In Advanced Materials, Structures and Mechanical Engineering, 339–44. CRC Press, 2016. http://dx.doi.org/10.1201/b19693-72.

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Conference papers on the topic "Mortier Porosité"

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Abdulkareem, O. A., J. C. Matthews, and A. M. M. A. Bakri. "Strength and porosity characterizations of blended biomass wood ash-fly ash-based geopolymer mortar." In 4TH ELECTRONIC AND GREEN MATERIALS INTERNATIONAL CONFERENCE 2018 (EGM 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5080909.

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Sorelli, L., J. Frech-Baronet, and J. P. Charron. "Creep Behavior of Cement Paste, Mortar, and Concrete: The Role of Relative Humidity and Interface Porosity." In 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479346.034.

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Merzouki, Tarek, Eric Blond, Nicolas Schmitt, Thierry Cutard, Alain Gasser, and Emmanuel de Bilbao. "Modelling of the Swelling of SiC-Based Refractory Lining Used in Waste-to-Energy Plants." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82101.

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This work provides a computational model of the chemo-mechanical behavior of based refractories used in waste to energy plant (WTE) linings. In this application, oxygen gas present in the atmosphere diffuses through the porosity and reacts with the refractory producing silica (SiO2). This new phase clogs gradually the pores and causes swelling of the refractory lining. The proposed thermo-chemo-mechanical model which simulates these phenomena is briefly summarized. The results obtained from the model implemented in a F.E code prove the ability of the model to reproduce qualitatively the swelling of post-mortem bricks taken from WTE linings.
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