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Добірка наукової літератури з теми "Hydratation du plâtre"
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Дисертації з теми "Hydratation du plâtre"
Espinosa, Bruno. "Modélisation, et contrôle par voie diélectrique, de l'hydratation des plâtres en présence d'ensemencement." Vandoeuvre-les-Nancy, INPL, 1989. http://www.theses.fr/1989NAN10469.
Повний текст джерелаDomenech, Marc. "Chimio-mécanique de l'hydratation du plâtre : conséquences de l'adjuvantation." Dijon, 2002. http://www.theses.fr/2002DIJOS067.
Повний текст джерелаEve, Sophie. "Comportement à la prise et propriétés mécaniques de matériaux composites à base de plâtre." Caen, 2003. http://www.theses.fr/2003CAEN2068.
Повний текст джерелаBadens, Elisabeth. "Etude de l'adsorption de l'eau sur les cristaux de gypse et de son influence sur les propriétés mécaniques du plâtre pris pur et additive." Aix-Marseille 3, 1998. http://www.theses.fr/1998AIX30002.
Повний текст джерелаDalmay, Pierre. "Etude physico-chimique et mécanique de composites à matrice plâtre contenant des fibres végétales." Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/53a14d4c-4935-4176-9a4c-f7102d682e0b/blobholder:0/2009LIMO4071.pdf.
Повний текст джерелаThe aim of this work was to study the structural, chemical and mechanical properties of natural fibre reinforced plasters. The interactions at the interfaces between flax or hemp fibres and gypsum were investigated. Natural fibres, especially hemp, delayed the setting of plaster when they were used untreated. Some treatments, for exmple alkali ones, were found to be efficient to reduce the setting times of slurries. The analysis of the compounds washed from the fibres revealed mainly the presence of sugars characteristic of pectins, already known as retarder of hydraulic setting materials, like cement or plaster. Absorption kinetics of different fibres was also measured by NMR relaxometry. Regarding the mechanical properties of the composites, the best results for both elastic properties and flexural strength were obtained for 3%wt of 1 cm long flax fibres. The damaging of the composite was also studied using an acoustic emission technique
Jaffel, Hamouda. "Caractérisation multi-échelles de matériaux poreux en évolution : cas du plâtre." Phd thesis, Ecole Polytechnique X, 2006. http://tel.archives-ouvertes.fr/tel-00122888.
Повний текст джерелаPedesseau, Laurent. "Modélisation atomique à l'équilibre de phases, périphases et interphases : vers l'application à des cristaux hydratés." Toulouse 3, 2004. http://www.theses.fr/2004TOU30286.
Повний текст джерелаThe setting and hardening of materials used in civil engineering (plaster, C-S-H) are based on interactions between crystals and ionic solutions. These interactions involve equilibriums between phases, their boundaries (referred to as periphases) and phases confined between periphases (referred to as interphases). Part 1, "Concepts, methods and tools", first introduces the pheno-corpuscular concept proposed for the study of these equilibriums that cannot be addressed in a macroscopic approach via the statistical physics or in a corpuscular approach alone. Among the original methods presented, the SASP method opens up the pheno-corpuscular pathway in physicochemistry; then is presented the OPTASYM method using molecular modelling to propose positions of H atoms unknown in certain crystalline structures; finally is exposed the CAC method based on a simultaneous use of AFM experiment and simulation. The original numerical tools are mainly devoted to joint crystal/solution processing, an area that is still at its beginnings in molecular modelling. Part 2, "Mass equilibrium of phases, periphases and interphases" first addresses the build-up of complete crystal atomic structures (gypsum, ettringite and thaumasite), of molecules and ions structures and of solution structures, the SASP method leading numerically, in this last case, to the fundamental relation between concentrations and chemical potentials. Once these structures have been defined, their interactions are first handled by docking between the crystalline faces and molecules or ions. The crystal/solution/crystal interaction is then presented using SASP, in the case of a saturated solution of gypsum. Whence, for the first time, the structure of an interphase of thickness < 1 nm. Part 3, "Mechanical equilibrium of phases, periphases and interphases", consists, first of all, of a critical study of estimation by molecular modelling of the total stresses of ionic crystals and solutions. The introduction of calculation of partial stresses, which cannot be performed by experiment, is particularly promising for linking macroscopic failure strength and atomic structure. Mechanical equilibrium between phases, periphases and interphases is first examined in normal displacement of various pairs of faces (120), (010) or (-101) until adhesion failure, the solution interphase (CaSO4, CaCl2 or Na2SO4) being in a non-equilibrium ionic situation (to simulate transitory or isolated states), possibly with citric acid. The study is then repeated in an equilibrium ionic situation using the SASP method for the gypsum faces (120) in a saturated solution. Finally, a first illustration of an interphase shearing is given in the case of faces (120), with a non-equilibrated solution of CaSO4 and citric acid. The conclusion underlines the progress made in this work on crystal/solution atomic modelling and its prospects within the overall pheno-corpuscular approach