Academic literature on the topic 'Cycle gel-Dégel'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Cycle gel-Dégel.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Cycle gel-Dégel":
Roy, M., P. La Rochelle, S. Leroueil, J. M. Konrad, and G. Bergeron. "Effets de cycles de gel–dégel sur les propriétés d'une argile sensible." Canadian Geotechnical Journal 32, no. 4 (August 1, 1995): 725–40. http://dx.doi.org/10.1139/t95-070.
Francou, Bernard. "Régime thermique des sols et rôle du gel dans la dynamique des versants d’un milieu subéquatorial d’altitude : les Andes centrales du Pérou." Géographie physique et Quaternaire 43, no. 1 (December 18, 2007): 97–112. http://dx.doi.org/10.7202/032757ar.
Marchand, J., M. Pigeon, and L. Boisvert. "Influence de la température minimale du cycle de gel–dégel sur la détérioration du béton par écaillage en présence de sels fondants." Canadian Journal of Civil Engineering 23, no. 3 (June 1, 1996): 595–601. http://dx.doi.org/10.1139/l96-868.
Bertran, Pascal, Jean-Pierre Coutard, Bernard Francou, Jean-Claude Ozouf, and Jean-Pierre Texier. "Données nouvelles sur l’origine du lintage des grèzes : implications paléoclimatiques." Géographie physique et Quaternaire 46, no. 1 (November 23, 2007): 97–112. http://dx.doi.org/10.7202/032891ar.
Boisvert, Jean, Jacques Marchand, Michel Pigeon, and Henri L. Isabelle. "Durabilité au gel-dégel et résistance à l'écaillage des pavés de béton." Canadian Journal of Civil Engineering 19, no. 6 (December 1, 1992): 1017–24. http://dx.doi.org/10.1139/l92-121.
Prick, A., A. Pissart, and J. C. Ozouf. "Variations Dilatométriques de Cylindres de Roches Calcaires Subissant des Cycles de Gel-Dégel." Permafrost and Periglacial Processes 4, no. 1 (January 1993): 1–15. http://dx.doi.org/10.1002/ppp.3430040102.
Gasc-Barbier, Muriel, Véronique Merrien-Soukatchoff, and Claudia Villarraga-Diaz. "Effet de cycles thermiques sur un massif rocheux : observations et mesures au laboratoire et in situ." Revue Française de Géotechnique, no. 163 (2020): 4. http://dx.doi.org/10.1051/geotech/2020013.
Durand, G. "Etude de l'influence du sel sur le comportement d'èprouvettes soumises à des cycles ‘Gel-Dégel’." Materials and Structures 20, no. 6 (November 1987): 461–62. http://dx.doi.org/10.1007/bf02472498.
FORTIN, GUILLAUME. "Variabilité et fréquence des cycles de gel-dégel dans la région de Québec, 1977-2006." Canadian Geographer / Le Géographe canadien 54, no. 2 (January 28, 2010): 196–208. http://dx.doi.org/10.1111/j.1541-0064.2009.00291.x.
Dacko, Marion. "Franchir les montagnes du Massif central à l’époque romaine. Sources antiques et données archéologiques." Aquitania : une revue inter-régionale d'archéologie 37, no. 1 (2021): 103–15. http://dx.doi.org/10.3406/aquit.2021.1640.
Dissertations / Theses on the topic "Cycle gel-Dégel":
Samson, Martin. "Changements des propriétés hydrauliques de sols argileux consolidés et soumis à un cycle de gel et de dégel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq33747.pdf.
Boumarafi, Abdelkader. "Évaluation des propriétés physiques et mécaniques et les effets des cycles gel-dégel de composites fabriqués par enroulement filamentaire." Mémoire, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/5928.
Casbonne-Renaud, Frédérique. "Comportement aux cycles gel-dégel des bétons de granulats calcaires." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL053N.
Tran, Duc Thang. "Endommagement des enrobés bitumineux soumis à des cycles de gel / dégel." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSET011.
This PhD thesis is part of a collaboration between “l’École Nationale des Travaux Publics de l’État” (ENTPE) and the research center of Eurovia within the national project DVDC. PhD works contribute to the sub-theme 1.5 dealing with winter degradations included in Theme 1 of the national project, on the mechanisms of pavement degradation. PhD thesis studies damages in bituminous mixtures, which might be caused by water and freeze/thaw cycles. A literature review on the effect of water and frost on bituminous mixtures was carried out as a first part of the thesis. After the literature review, two experimental campaigns were proposed and realized: a main campaign and a complementary campaign. The main campaign studies the effects of water saturation, freezing/thaw cycles (FT), thermal cycles with heating (Heating/Freezing-HF cycle and Heating/Cooling- HC cycle) on non-aged and aged bituminous mixtures. It focuses on three main behaviours of bituminous mixture : viscoelastic behaviour, fatigue behaviour and thermomechanical coupling. In the domain of linear viscoelastic behaviour (VEL), the complex module test was performed on a bituminous mixture subjected to different conditions : water conditioning, FT cycles, HF cycles or HC cycles. The VEL behaviour of the tested material was then modeled using the 2S2P1D model (2 Springs, 2 Parabolic elements, 1 Dashpot) developed at ENTPE. The fatigue behaviour of bituminous mixture subjected to 50 FT cycles and water saturation was studied. Sinusoidal loading in controlled axial strain mode was applied at 10 Hz and 10°C. The effects of water saturation and FT conditioning were then analyzed by using the Wöhler fatigue curves. A model was used to simulate the damage evolution. In the low temperature behaviour domain, the specimens were studied by using the Thermal Stress Restrained Specimen Test (TSRST) and Thermal Unstressed Specimen Test (TUST). The temperature, the stress and the radial strain at failure were analyzed to investigate the conditioning effects. The results show a non-significant effect of the FT cycles and water conditioning on the bituminous mixture behaviour, for small strain loading (less than 120μdef) and at positive testing temperature. However, the effect of water conditioning becomes dominant and significant at low temperatures, especially in the TSRST. For the non-aged material conditioned with HF and HC cycles, the aging of the bitumen was observed by using the normalized curves of complex modulus
Bouchard, Régis. "Durabilité aux cycles de gel-dégel de bétons fabriqués avec des liants binaires et ternaires." Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9573.
Rhardane, Abderrahmane. "Elaboration d’une approche micromécanique pour modéliser l’endommagement des matériaux cimentaires sous fluage et cycles de gel-dégel." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0060/document.
Numerical modelling of the constitutivebehaviour of cementitious materials exposed to aggressive environment offers an alternative point of view for the identification and assessment of internal mechanisms which cannot be explicitly explored using standard experimental techniques. In this regard, the development of advanced modelling tools that take into account the interactions between the heterogeneous microstructure of cement paste and the macroscopic behaviour cementitious materials is highly valued. Such modelling approaches give a much better description of the physical processes and avoid recurrent parameter calibration when dealing with a different microstructure.The work presented in this PhD thesis proposes a numerical modelling approach of damage in cement based materials taking heed of the physical mechanics that can only be characterized at the microscopic level. In the proposed approach, the principles of constructing a virtual microstructure of cement paste are laid out and the micromechanical parameters of cement phases are identified. The predictive capacity of the micromechanical approach is put to the test by a comparison of numerical results with experimental data determined in the present study and found in the literature. Finally, the power of the approach is illustrated through simulations of creep and freeze-thaw behaviour at the microscopic scale of cement paste.This approach paves the way for a multitude of applications, such as the study of the effect of shrinkage, creep, freeze-thaw cycles, thermal cracking, self-healing and carbonation on the thermomechanical properties of cement-based materials
Khanfour, Mohamed Akram. "Étude de l'influence des cycles de gel/dégel sur le comportement mécanique des poutres en béton armé de PRFB." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30817/30817.pdf.
The objective of this project is to study the effect of freeze-and-thaw cycles on the mechanical performance of concrete beams reinforced with basalt fibre-reinforced polymers (BFRP) bars that are recently developed. Twenty concrete beams reinforced with BFRP bars were cast and exposed to two different environments: (a) room temperature and (b) 260 cycles of freeze-and-thaw at temperature varying between 25oC and +15oC. The project investigated two other parameters namely (a) the internal reinforcement ratio (under and over reinforced beams) and the shear span-to-depth ratio (a / d). All beams were tested in four point bending. The experimental results were compared to the predictions of the Canadian code. The effect of each parameter on the behaviour of the beams is presented and discussed.
Mohamed, A. S. Mohamed. "Influence de la valorisation de microfibres végétales sur la formation et la résistance aux cycles de gel-dégel de BAP." Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0550/document.
The aim of this work is to emphasize the advantages and disadvantages of introducing vegetable based microfibers, resulting from cardboard recycling, in self compacting concrete SCC, and especially their influence on the frost durability. An experimental methodology has been developed for SCC formulation based on following requirements: class of environmental exposure XF2, slump flow Dmoy = 68 ± 2 cm. It is based also on the maximum packing theory for the determination of solid particles content and the method of concrete equivalent mortar, CEM, for superplasticizer dosage. Starting from the SCC of reference composition, vegetable based microfibers were introduced at six different volumetric percentages related to cement volume. A campaign of experimental tests performed on fibred CEM showed that the introduction of microfibers at a volumetric dosage between 21% and 41% improved physical and mechanical properties. On the SCC scale, the experimental results have shown that fibred SCC at previous dosages, FSCC 21% and FSCC 41%, have porosity and permeability lower than the SCC of reference and consequently higher mechanical properties. Frost resistance of , SCC of reference, FSCC 21% and a SCC formulated with an air-entraining as well as two vibrated concretes, the first of reference and second containing 15% microfibers by volume of cement, was studied by subjecting them to freeze-thaw cycles according to NF P18-425. The results show that microfibers added concretes are more susceptible to frost damage. The harmful effect of vegetable based microfibers is explained by their hydrophilic nature associated to a low permeability of fibred concrete. Furthermore, the role of aggregates on the frost sensitivity was discussed. It was concluded that the porous and fragile lime aggregates should be avoided in concrete intended for cold climate
Van, Rooij Mahaut. "Etude du rougissement hivernal du Douglas : entre températures douces & formation de glace." Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2023. http://www.theses.fr/2023UCFA0154.
The Douglas fir is the first reforestation species in the Auvergne-Rhône-Alpes region and the second in France as a whole, and is of considerable economic importance in France, where 13 million trees are produced each year. Winter reddening affects young Douglas-fir (< 15 years old), affecting up to 80% of the plantation. A reddening tree has no silvicultural future and typically dies within a year after reddening. The objectives of my PhD thesis were to have a better understanding of winter reddening by identifying the climatic parameters that trigger reddening and, more importantly, the physiological mechanism(s) that cause needle reddening.A thorough literature review and bioclimatic analysis were undertaken to identify critical climatic factors. The literature synthesis identified certain climatic conditions characteristic of 'reddening' years, including anticyclonic periods after winter and/or alternating cold and warm periods. Both the literature synthesis and the bioclimatic analysis identified a combination of climatic variables: warm daily temperatures, high daily temperature amplitude, at least moderate wind speeds and relative humidity. However, the freeze-thaw cycles with cold night temperatures did not emerge from the climate analysis, although they are mentioned in the literature.In order to understand how Douglas fir reddens, we first identified gaps in our knowledge of winter reddening and proposed potential mechanisms, either single or interacting, that cause this physiological disorder: 1) winter drought leading to hydraulic failure, 2) photo-oxidative stress, and 3) premature deacclimation. Under controlled conditions, young Douglas fir trees were exposed to winter drought through a temperature differential between roots and canopy (TSOIL < 5°C; TMOY_AIR ~ 14°C). Some of these trees were exposed to light intensities that could induce photooxydative stress (> 1800 PPFD). Cold soil temperatures induced moderate water stress by limiting root water uptake, while warm air temperatures caused water loss at the needle level. However, Douglas fir was able to acclimate to this new environment and even resumed growth. Exposure to high light intensity did not cause irreversible damage to PSII or photooxydative stress. No reddening of the Douglas fir was observed, thus refuting hypothesis 2, but partially supporting hypothesis 1, as the canopy was not exposed to freezing stress. In the field, continuous measurements of young Douglas fir diameter variation were coupled with temperature/humidity measurements from four plots in the Massif Central from December 2020 to June 2023. Spring frosts in April 2021 on deacclimated Douglas fir did not result in needle reddening or cambial damages, thus failing to validate hypothesis 3. Nevertheless, comparison of a asymptomatic winter (2021) with a asymptomatic winter i.e. with winter reddening (2022) revealed significant hydraulic stress generated from the apex, associated with an anticyclone period in January 2022. Hydraulic failure could be exacerbated by daily transpiration, combined with freeze-thaw cycles that increase hydraulic stress, leading to canopy hydraulic failure that could explain needle desiccation and reddening. We therefore favour hypothesis 1, which should be tested under controlled conditions
Bouteille, Sébastien, and Sébastien Bouteille. "Outils de caractérisation et analyse du comportement des matériaux cimentaires soumis à des cycles de gel-dégel en présence de sels." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00872934.