Academic literature on the topic 'Poudres de fibres de verre polyester'
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Journal articles on the topic "Poudres de fibres de verre polyester":
"Etude géotechnique pour la pose des conduites en polyester renforcée de fibres de verre (PRV) dans le cadre d’un système d’approvisionnement en eau potable : cas de la ville de Bouaké (Centre de la Côte d’Ivoire)." Journal of Chemical, Biological and physical sciences 12, no. 4 (November 7, 2022). http://dx.doi.org/10.24214/jcbps.d.12.4.31732.
Dissertations / Theses on the topic "Poudres de fibres de verre polyester":
Daher, Jana. "Valorisation de sédiments de dragage et de terre excavée dans la formulation de matériaux de construction imprimables." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Lille Douai, 2023. http://www.theses.fr/2023MTLD0002.
Concrete 3D Printing is one of the newest technologies in the field of construction. It offers advantages and opportunities over the traditional construction method, notably speed of construction and flexibility of architectural design. However, most printable materials used nowadays require a high cement content, the production of which generates significant CO2 emissions. Reducing the environmental impact of printable concrete is currently the focus of researchers who aim to use alternative materials to replace cement and reduce its high consumption in 3D printable mixes. This research work focuses on the valorization of alternative and innovative materials, currently considered as waste, in 3D printing, to develop printable mixtures with low environmental impact. The alternative materials used are dredged sediments, polyester glass-fiber powders and excavated soil. These materials are chosen for their recycling potential, their intrinsic properties, and the urgency of their management due to their large quantity. Moreover, little work is devoted to the recycling of these specific types of waste in concrete 3D printing, hence the objective of this thesis. An experimental methodology is therefore implemented to develop optimal mixtures. First, the extrudability and buildability are evaluated and verified in order to validate the printability of the developed mixes. Then, the fresh and hardened properties of the printable mortars are studied. Furthermore, in this research, different printing scales are tested, from the laboratory scale to the 3D printer scale. In the first part of the study, flash-calcined sediment is used in a printable control mixture, producing a binary binder (cement/flash-calcined sediment) and a ternary binder (cement/flash-calcined sediment/limestone filler), and polyester glass-fiber powders are used, as reinforcement, in the control mixture, substituting a portion of the sand. In the second part of the study, excavated soil is used as a total substitute for sand. The results of the first part of the study show that several mixtures containing flash-calcined sediment are printable. These mixtures contain 5 and 10% of sediment when used alone, and 10 and 20% of sediment when used with 20 and 30% of limestone filler, respectively. A cement substitution of 50% is therefore achieved with the printable mixture containing 20% of sediment and 30% of limestone filler. In addition, mixtures containing up to 10% of polyester glass-fiber powders are also printable. Furthermore, the results of the second part of the study show that formulations with a high content of excavated soil and a low cement content are printable and resistant. The printable formulations contain different amounts of soil, about 2, 4 and 6 times the amount of cement, with the most environmentally friendly formulation having a soil content of 1602 kg/m3 and a cement content of 282 kg/m3. This research work highlights the possibility of developing new ecological and resistant mixtures based on alternative materials that can be used in 3D printing construction applications
Nguyen-Hoa, Hoi. "Prévision de la rupture des composites polyester/tissus de verre." Sherbrooke : Université de Sherbrooke, 1999.
Do, Thanh Viet. "Étude du retrait du polyester renforcé par des tissus de verre." Sherbrooke : Université de Sherbrooke, 2001.
Delfolie, Corinne. "Phénomènes d'interface et réponse mécanique dans des composites polyester - verre." Lille 1, 1996. http://www.theses.fr/1996LIL10221.
Les influences respectives du degré de solubilité et de la nature de l'additif sur la microstructure de l'interphase sont découplées. Dans les systèmes insolubles, l'ensimage formant un réseau réticule à la surface du verre, son influence sur la thermodynamique locale est réduite. La liaison à l'interface est assurée par la formation d'un réseau interpénètre réticule, ce qui confère un caractère fragile à l'interface dans ces composites. Dans le cas soluble, la nature de l'additif low profile est déterminante dans la constitution de l'interphase. Pour le système à base pvac, la solubilisation partielle de l'ensimage modifie localement le diagramme de phase ternaire up-st-lpa, et conduit à la ségrégation du thermoplastique à l'interface. L'interphase a alors un caractère plutôt ductile. Pour le système à base pmma(ho), le développement de liaisons hydrogène au sein de l'additif limite la solubilisation de l'ensimage, et donc son influence sur la gélification de la résine. Les ponts hydrogène jouant le rôle de nœuds de réticulation, le schéma de constitution de l'interface est similaire à celui du système insoluble
GAUTIER, LUDMILA. "Endommagement osmotique de composites fibres de verre-matrices polyester insature en environnement humide." Paris, ENSAM, 1999. http://www.theses.fr/1999ENAM0026.
Reygrobellet, Jean-Noël. "Recyclage de composites fibres de verre-polyester insaturé-carbonate de calcium par réincorporation dans des matrices thermoplastiques." Montpellier 2, 2000. http://www.theses.fr/2000MON20038.
Leparmentier, Stéphanie. "Développement et caractérisation de fibres optiques mutimatériaux verre/silice ou verre/air/silice réalisées par un procédé basé sur l'utilisation de poudre de verres." Limoges, 2010. https://aurore.unilim.fr/theses/nxfile/default/9a6a6173-9535-4b24-87c6-133a3823f1a2/blobholder:0/2010LIMO4031.pdf.
The realization of far infrared optical fibres as waveguides or light sources need special optical glasses which are sometimes expensive, brittle and difficult to use for PCF’s drawing. To overcome those drawbacks, we purposed the realization of multimaterials optical fibres for which only the core material is composed of the performed glass and the high fibre strength is allowed thanks to the pure silica cladding. Such glass/silica fibres present high Δn and non linear coefficients comparable to all glass PCF. We have also developed a process to realize these fibres, based on the use of powdered materials and compatible with PCF realizations. Optical losses of the multimaterials fibres presented here are a few dB/m in the near infrared band. Moreover, an interferometric method has also been developed to estimate the optical fibre core material refractive index on a wide wavelength band
Perrot, Yves. "Influence de la matrice sur le comportement mécanique de matériaux composites verre/polyester utilisés en construction navale de plaisance : cas des résines polyester limitant les émissions de styrène." Lorient, 2006. http://www.theses.fr/2006LORIS074.
The work performed in this study is concerned with the characterization of glass/polyester composites for the pleasure boat industry. In particular the properties of polyester resins limiting styrene emissions have been evaluated. Physico-chemical and mechnanical tests were first performed in order to understand the roles played by the constituants (matrix, fibres and fibre/matrix interface). Then a study of damage mechanisms, delamination and impact resistance, was carried out on composite specimens. Durability and the influence of the marine environment was also examined through two parameters, temperature and sea water aging. Finally the transfer from material to structure was illustrated through three aspects : the influence of fabrication (over-lamination), the behaviour of panels subjected to uniform pressure loading, and the design rules. The results of the study show that a multi-disciplinary approach, including investigation at different scales, is necessary to understand the specific characteristics of these composite materials
Oliveux, Géraldine. "Influence des conditions d'hydrolyse sous-critique sur le recyclage des matériaux composites fibres de verre / résine polyester insaturé : influence des conditions et de la structure de la résine sur les cinétiques réactionnelles." Nantes, 2012. http://www.theses.fr/2012NANT2110.
A hydrolysis process in batch conditions is applied to break ester bonds of unsaturated polyester resins, crosslinked with styrene, as matrices of composite materials reinforced with glass fibres. Subcritical two-phase conditions appear adapted in view of the involved chemistry. The hydrolysis reaction follows in fact an Aac2 mechanism and requires then conditions enhancing ionic reactions, that is to say in particular sufficient values of the ionic product and of the relative dielectric constant of water. It allows the recovery of the initial monomers of the resin. But the latter’s are subjected to secondary ionic reactions. This hydrolysis treatment also affects the quality of the recovered glass fibres. They are corroded, loosing thus some of their mechanical properties, and require a washing phase to remove residual organic components. Conditions have however been identified as allowing minimizing the degradation of their mechanical properties. Those conditions also allow a maximum recovery rate of the initial monomers of the resin. Thus in less than an hour, it is possible to break almost all the ester bonds of the resin. A longer treatment time only allows secondary reactions to continue. A semi-continuous process appears to be essential to minimize secondary reactions and avoid the washing post-treatment of the fibres. It can also allow a less important degradation of them