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Littérature scientifique sur le sujet « Ceramic shaped brick »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 5 février 2022

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Articles de revues sur le sujet "Ceramic shaped brick"

Lima, Elisiane S., João M. P. Q. Delgado, Ana S. Guimarães, Wanderson M. P. B. Lima, Ivonete B. Santos, Josivanda P. Gomes, Rosilda S. Santos et al. « Drying and Heating Processes in Arbitrarily Shaped Clay Materials Using Lumped Phenomenological Modeling ». Energies 14, n^o 14 (16 juillet 2021) : 4294. http://dx.doi.org/10.3390/en14144294.

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This work aims to study the drying of clay ceramic materials with arbitrary shapes theoretically. Advanced phenomenological mathematical models based on lumped analysis and their exact solutions are presented to predict the heat and mass transfers in the porous material and estimate the transport coefficients. Application has been made in hollow ceramic bricks. Different simulations were carried out to evaluate the effect of drying air conditions (relative humidity and speed) under conditions of forced and natural convection. The transient results of the moisture content and temperature of the brick, and the convective heat and mass transfer coefficients are presented, discussed and compared with experimental data, obtaining a good agreement. It was found that the lower the relative humidity is and the higher the speed of the drying air is, the higher the convective heat and mass transfer coefficients are at the surface of the brick and in the holes, and the faster the moisture removal material and heating is. Based on the predicted results, the best conditions for brick drying were given. The idea is to increase the quality of the brick after the process, to reduce the waste of raw material and energy consumption in the process.

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Zach, Jiri, Jitka Peterková et Martin Sedlmajer. « Utilization of Alternative Insulation Materials for Thermal Insulating Ceramics Blocks Production ». Advanced Materials Research 482-484 (février 2012) : 1570–75. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1570.

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There has been a substantional increase of atributes for building constructions in area of thermal protection in last decade. This was shown as increasing of requirements for materials and components intended for building of cover constructions as well. In case of shaped bricks used for perimeter walls advanced production technologies were applied. These technologies consist of decreasing thermal conductivity coefficient for brick clinker, of decreasing inner ribs thickness and in last years this concerns the technology of filling inner cavities of shaped bricks with thermal insulating materials as well. This paper describes possibilities of using alternative raw material sources (natural fibres originated in agriculture, separate textile waste, ....) as integrated insulating layers in contemporary ceramic shaped bricks with high usable qualities.

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Pountouenchi, A., D. Njoya, A. Njoya, D. Rabibisao, J. R. Mache, R. F. Yongue, D. Njopwouo, N. Fagel, P. Pilate et L. Van Parys. « Characterization of clays from the Foumban region (west Cameroon) and evaluation for refractory brick manufacture ». Clay Minerals 53, n^o 3 (septembre 2018) : 447–57. http://dx.doi.org/10.1180/clm.2018.32.

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ABSTRACTThree clayey materials named MY3, KK and KG originating from the Foumban region (west Cameroon) were analysed to determine their granulometry, plasticity, major-element chemistry and mineralogy. Dilatometric and ceramic behaviour were also investigated. Clays were shaped by uniaxial pressing in a steel mould. Shaped samples were heated at 1300, 1400 and 1500°C. The end products were characterized in terms of their density, porosity and compressive strength. Raw materials differ in terms of their mineralogical composition, grain-size distribution, Al2O3 content and the nature and abundance of impurities inducing specific thermal behaviour during dilatometric analysis and sintering tests. The final material properties may be related to the main features of the raw materials used.

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Terrones-Saeta, Juan María, Jorge Suárez-Macías, Francisco Javier Iglesias-Godino et Francisco Antonio Corpas-Iglesias. « Study of the Incorporation of Biomass Bottom Ashes in Ceramic Materials for the Manufacture of Bricks and Evaluation of Their Leachates ». Materials 13, n^o 9 (1 mai 2020) : 2099. http://dx.doi.org/10.3390/ma13092099.

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Scarcity of raw materials, reduction of greenhouse gas emissions and reduction of waste disposal in landfills are leading to the development of more sustainable building materials. Based on these lines, this work studies the incorporation of biomass bottom ashes into ceramic materials for brick manufacture, in order to reuse this currently unused waste and reduce clay extraction operations. To this end, different groups of samples were made with different combinations of clay and biomass bottom ashes, from 100% clay to 100% biomass bottom ashes. These samples were shaped, sintered and subjected to the usual physical tests in ceramics. In turn, the mechanical resistance, color and leaching of the contaminating elements present were studied. The physical and mechanical tests showed that the results of all the families were adequate, achieving compressive strengths of over 20 MPa and leaching of the contaminating elements acceptable by the regulations. Therefore, a sustainable range of ceramics was developed, with specific properties (porosity, density, resistance and color), with a waste that is currently unused and sustainable with the environment.

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Sopp, Jeffrey M., et Mehmet Sarikaya. « Nanomechanical Property Determination of Organic Matrix in Mollusc Shell Nacre : A Biocomposite ». Microscopy and Microanalysis 5, S2 (août 1999) : 984–85. http://dx.doi.org/10.1017/s1431927600018249.

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Mechanical properties were determined from the organic matrix of a mollusc hard tissue using a nanomechanical testing instrument attached to an atomic force microscope (AFM). Shells of molluscs are two-tier functionally-gradient ceramic/polymer biocomposites used by organisms as impact resistant materials. The inner section of the red abalone (Haliotis refuscens)shell, nacre (mother-ofpearl), has a brick and mortar microarchitecture with pseudo-hexagonal-shaped bricks made of aragonitic (orthorhombic) CaCO3 platelets (0.25 μn thick, and 5 μm edge length) surrounded by a thin (10-25 nm thick) proteinaceous organic matrix (Fig. 1). This higly ordered biocomposite has submicron-layered structure that result in excellent bulk mechanical properties, not achieved by manmade composites with similar phase compositions and, therefore, offers biomimetic lessons for novel materials design. In this model biomimetic composite, mechanical properties of its constituents need to be evaluated in addition to the details of the microstructure. We previously determined nanomechanical properties (hardness and modulus) of individual (twinned, single crystalline) aragonitic platelets.

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Nagy, Balázs. « Hygrothermal modelling of masonry blocks filled with thermal insulation ». MATEC Web of Conferences 163 (2018) : 08006. http://dx.doi.org/10.1051/matecconf/201816308006.

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Ceramic brick as building material has been used for thousands of years. Nowadays, the energy performance of new products has to meet rigorous requirements; therefore, in the design of new ceramic masonry blocks, building physical simulations are essential. The aim of this research is to evaluate existing masonry block shapes filled with different thermal insulation using conjugated heat and moisture transport finite element simulations with material properties measured in laboratory. The research compared four different internal structures: trapezoidal, triangular, rectangular, and with mixed shaped gaps according to existing masonry blocks. In the gaps, different thermal insulations were considered, such as mineral wool, expanded perlite and polyurethane foam. The research demonstrated that the perlite as filling material does not have a great effect on thermal conductivity comparing to unfilled blocks; however, polyurethane foam with an optimal internal structure can improve the thermal performance. Manufacturing inaccuracies in the materials’ hygrothermal properties influences their performance, since a little difference in thermal conductivity has a noticeable impact on thermal transmittance, and it may result in underperformance according to regulations.

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Cotes Palomino, M. T., Carmen Martínez García, F. J. Iglesias Godino, D. Eliche Quesada, Francisco José Pérez Latorre, F. M. Calero de Hoces et F. A. Corpas Iglesias. « Study of Waste from Two-Phase Olive Oil Extraction as an Additive in Ceramic Material ». Key Engineering Materials 663 (septembre 2015) : 86–93. http://dx.doi.org/10.4028/www.scientific.net/kem.663.86.

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The properties of ceramic materials are intimately related to a variety of factors, among them shaping procedure and sintering time. These factors condition, the microstructure and properties of the materials developed. Our study has formed materials from clays commonly used in the area of Bailén (Jaén) and wet pomace proceeding from the extraction of olive oil. The materials were shaped through extrusion. In this study, raw materials have been characterized and studied interesting properties of sintered materials, such as compressive strength, water absorption, open porosity or bulk density. The study concluded that the addition of wet pomace from olive oil industry into traditional brick entails a saving of raw materials and reducing the environmental impact generated by their manufacture. The best results are obtained for the samples with waste content of 3 wt %.

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Barba Molina, Hernan, et Jan Hesselbarth. « Microwave dielectric stepped-index flat lens antenna ». International Journal of Microwave and Wireless Technologies 9, n^o 5 (19 octobre 2016) : 1103–9. http://dx.doi.org/10.1017/s1759078716001124.

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Dielectric stepped-index flat lens antennas for operation at 12 GHz are presented. A brick-shaped dielectric with a permittivity profile optimized for focusing is sandwiched between the metallic plates of an open-ended parallel-plate waveguide. A tapered slot antenna is placed at the focal point of the dielectric lens, thereby creating antennas with high directivity of 16.8 and 15.8 dBi, respectively. In the two versions of the antenna, the parallel-plate waveguide operates in TEM-mode and in the first higher-order TE-mode, respectively. The dielectric profile is realized by appropriate mixtures of alumina ceramic powder and microscopic hollow glass spheres, realizing permittivity ranging from εrel= 1.31 to εrel= 3.24. The design of the complete antennas is based on geometrical optics followed by optimizations with a full-wave electromagnetic solver. Measurements show good agreement with simulations.

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William N. Mercer, J. M. Sopp, H. Fong, K. S. Katti, D. R. Katti et M. Sarikaya. « Nanomechanical Properties of a Biocomposite, Mollusk Shell Nacre ». Microscopy and Microanalysis 6, S2 (août 2000) : 898–99. http://dx.doi.org/10.1017/s1431927600036989.

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Mechanical properties of the structural elements of mollusk hard tissues were determined using nanoindentation techniques. Red abalone (Haliotis refuscens) has a dual laminate ceramic/polymer biocomposite, evolved for protection against impact. The nacre (mother-of-pearl) section of the shell has excellent bending strength (180 MPa) and fracture toughness (12 MPa m1/2), orders of magnitude stronger and tougher than monolithic CaCO3, it's primary component. The outer prismatic structure is comprised of columnar calcite (rhombohedral CaCO3) crystallites oriented normal to the shell surface and the inner nacreous structure consists of layers of pseudo-hexagonal shaped aragonite (orthorhombic CaCO3) platelets arranged in a brick and mortar microarchitecture (Fig. 1). The platelets (0.25 μm thick and 5 μm edge length) are surrounded by a thin layer (10-25 nm) of organic phase within and between the individual layers. This sub-um layered structure results in excellent bulk properties, not present in man-made composites of similar phase composition.

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Nascimento, J. J. S., F. A. Belo et Antônio Gilson Barbosa de Lima. « Experimental Drying of Ceramics Bricks Including Shrinkage ». Defect and Diffusion Forum 365 (juillet 2015) : 106–11. http://dx.doi.org/10.4028/www.scientific.net/ddf.365.106.

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This work presents an experimental study on the behavior of clays during the drying process. Experimental tests were carried out with clay material for the production of red ceramics and white ceramic (ball clay). Different dimensions and the material initial moisture content plus temperature and relative air-drying humidity were taken into account. Drying kinetics and volume changes of parallelepiped-shaped samples were shown and analyzed. It has been verified that air-drying temperatures and body shape have an enormous influence on the drying rate process. The drying process occurs during the falling drying period and the volume changes display two linear periods.

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Thèses sur le sujet "Ceramic shaped brick"

Písařík, Jan. « Polyfunkční dům v Brně Medlánkách ». Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226195.

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Master´s thesis “Multifunctional building in Brno Medlánky“ is processed in the form of project documentation. Multifunctional building is designed as a detached house with a flat roof. The object has four above-ground floors with no basement. In the object there are twelve flats and three shops altogether. The object is made of building system Porotherm.

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Chapitres de livres sur le sujet "Ceramic shaped brick"

Herz, Norman, et Ervan G. Garrison. « Ceramics ». Dans Geological Methods for Archaeology. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195090246.003.0019.

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Archaeological ceramics refers to products made primarily of clay and containing variable amounts of lithic and other materials as well. The term ceramic is derived from the Greek keramos, which has been translated as "earthenware" or "burned stuff." Ceramics include products that have been fired, primarily pottery but also brick, tile, glass, plaster, and cement as well. Since pottery is by far the most important archaeologically, and the methods of sampling and study are largely applicable to the others, this chapter is devoted primarily to pottery. Pottery then is the general term used here for artifacts made entirely or largely of clay and hardened by heat. Today, a distinction is sometimes made between pottery, applied to lower-quality ceramic wares, and the higher-grade product porcelain. No such distinction will be made here, so the term pottery alone will be used. Raw material that goes into the making of a pot includes primarily clay, but also varying amounts of temper, which is added to make the material more manageable and to help preserve the worked shape of the pot during firing. Of primary interest in ceramic studies are 1. the nature and the source of the raw materials—clays, temper, and slip (applied surface pigment)—and a reconstruction of the working methods of ancient potters; 2. the physical properties of the raw materials, from their preparation as a clay-temper body through their transformations during manufacture into a final ceramic product; 3. the nature of the chemical and mineral reactions that take place during firing as a clue to the technology available to the potter; and 4. the uses, provenance, and trade of the wares produced. Much of the information needed to answer these questions is available through standard geochemical and petrographic analysis of ceramic artifacts. Insight into the working methods of ancient potters also has been obtained through ethnographic studies of cultures where, because of isolation or conservative traditions or both, ancient methods have been preserved.

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