Papers by Keyword: Roof Tiles

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Authors: Lorenço Neckel, André L.G. Prette, Orestes Estevam Alarcon, Márcio Celso Fredel
Abstract: In this work, it was investigated the behavior of a ceramic composition in pressing and firing process, related to its pyroplasticity, to permit the production of roof tiles in roller kiln. Experiments were realized varying the parameters of pressing, sintering and composition, adding a refractory material. With this study, it became possible to select the optimal parameters of pressing and firing, and to start the pilot industrial tests. The developed process has advantages, in the process and the final product, related with the standard process (extrusion and firing in tunnel kiln). The process is energetically more efficient, because there are no movable in the kiln. It was measured a flexural strength above 40 MPa with 12mm thickness, saving material. Also, the product has a higher quality in size, shape and dimensional precision (linear thermal shrinkage lower than 1,5%); tonality, porosity (water absorption lower than 10%), and frost resistance.
Authors: Yong Liu, Wei Min Yang, Ming Feng Hao
Abstract: The typical roof tiles made from soil or clay will be limited because it destroyed the farmland. On the other hand, the old tire and waste plastic increase year and year, which bring a serious environmental problem. So the roof tiles made from old tire and waste plastic will help a lot to decrease above environmental pressure. To get a suitable formula of roof tiles made from waste rubber tire powder and waste plastic, the present article studied mechanical performance of a series of composites. Then a preferred formula was got through comparing the mechanical performance.
Authors: Tomas Solny, Jiri Masilko, Jiří Švec, Iva Kolarova, Jiri Kratochvil, Ladislav Parizek, Jan Bednarek
Abstract: This study deals with stability and quality of surface treatment of concrete roof tiles, considering the use of special inorganic binders spraying onto freshly prefabricated surface of concrete roof tiles. Their application leads to smoothing of surface defects generated from previous processing. Method of applying the coating is discussed in this work among with stability study of styrene-acrylate cement mixtures. Impact of presence of selected styrene-acrylate copolymer onto the hydration of cement is evaluated, in order to verify, for how long could be prepared mixture used for treating freshly fabricated surface of concrete roof tiles. Pull-off tests results after freeze-thaw test are further presented in this study to verify designed coating process properties.
Authors: Tomáš Solný, Petr Kosár, Lukáš Kalina
Abstract: Therein the application of special inorganic binders onto a freshly prefabricated surface of concrete roof tiles for the purpose of improving the quality of surface properties is reported. The possibilities of preparation of polymer-cement matrix with improvement gained from plasticizers are discused to obtain sprayable coating for roof tiles. Use of sprayable coating leads to smoothing of surface defects generated from previous processing of roof tiles thus improving the quality of surface leading to better durability of roof tiles with just a low increase of manufacturing cost.
Authors: Fabio Pimenta Esper Kallas, Oscar Rubem Klegues Montedo, Murilo Daniel de Mello Innocentini
Abstract: The aim of this work was to study the feasibility of incorporation of nickel slag as a raw material for production of roof tiles. Tests were carried out with the addition of different percentages of slag in the clay mass in order to find the composition for optimized product’s properties. The results indicated that the addition of up to 25% of nickel slag was advantageous, with an increase in density and mechanical strength and reduction of permeability and water absorption. There was no change in the leaching parameters measured according to the Brazilian Technical Standards.
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