Bories C.,ENSIACET |
Bories C.,French National Institute for Agricultural Research |
Aouba L.,CNRS Materials and Construction Durability Laboratory |
Aouba L.,Terreal Inc. |
And 4 more authors.
Construction and Building Materials
The main objective of this study is to investigate the effects of the incorporation of renewable pore-forming agents on the properties of fired bricks. Different additives have been studied (wheat straw, sunflower seed cake and olive stone flour) at different grinding and incorporation rate. Physical properties such as linear shrinkage, loss on ignition, bulk porosity, water absorption and bulk density have been measured. Mechanical and thermal performances have also been characterized. The incorporation of 4 wt.% of sunflower seed cake, with the lowest grinding, leads to the best compromise between mechanical and thermal results compared to the reference brick. © 2015 Published by Elsevier Ltd. Source
Vignes J.,CNRS Clement Ader Institute |
Schmidt F.,CNRS Clement Ader Institute |
Dusserre G.,CNRS Clement Ader Institute |
Dalmasso J.F.,Terreal Inc.
Key Engineering Materials
In the industrial process, the moisture of the clay sheet obtained by extrusion and pressed to form a tile varies in time. It depends on the nature and the mixing of the raw materials during the production. In order to model and understand the influence of the moisture on the pressing step, it is necessary to determine the parameters of the rheological and tribological laws. A study of the rheological behaviour, based on free compression tests on cylinder samples, allowed to use an elasto-visco-plastic behaviour for the extruded clay paste. The different constitutive parameters were estimated by an inverse analysis based on the experimental force/displacement curves. The identification was performed with the optimisation algorithm implemented in the commercial software Forge® 2009. The influence of the water content in the paste on the rheological parameters was identified and fitted using linear models. To understand the influence of the moisture, we simulated a compression test, using Forge® involving the shaping of a tile lug. This geometry is representative of the state of stress during the pressing of the tile, in an area currently subjected to defects. The numerical model shows that an increase of eighteen percent of the moisture, allows to decrease by half the pressing force. Copyright © 2013 Trans Tech Publications Ltd. Source
Terreal Inc. | Date: 2009-04-14
Terreal Inc. | Date: 2015-06-03
Building materials, not of metal; materials for roofing, building structures, sidings and wall coverings of terra-cotta, concrete, asphalt, cement, composite or synthetic materials, reinforced or not with fibers; non-metallic rigid pipes for building; pitch and bitumen; transportable buildings not of metal; monuments not of metal; lintels, bricks; ledges, non-metallic wall tiles for construction purposes; gutters and roof gutters not of metal, shutters not of metal, chimney cowls not of metal, beams, joists, frames and cornices not of metal; under roof screens not of metal; under roof tarpaulins. Retail services for roofing materials.
Terreal Inc. | Date: 2014-02-04
Building elements made of terracotta. Construction, installation, maintenance and repair of public and private works and buildings; rental of construction tools and equipment; consultancy services regarding installation, maintenance and repair provided from data processing systems, computer databases or computer or telematic networks, including the Internet. Transmission, communication and telecommunication services via any means, including electronic, computer, telephone and audiovisual means; computer-aided transmission of messages and images, transmission of information held in databases; electronic and telephone mail and messaging services; electronic exchange of information; communication by computer terminals on the Internet, Extranet and Intranet networks. Consultancy services regarding construction provided from data processing systems, computer databases or computer or telematic networks, including the Internet.