<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Abdulla, Galal</style></author><author><style face="normal" font="default" size="100%">Belghit, Abdelhamid</style></author><author><style face="normal" font="default" size="100%">Allaf, Karim</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Impact of Instant Controlled Pressure Drop Treatment on Moisture Adsorption Isotherm of Cork Granules</style></title><secondary-title><style face="normal" font="default" size="100%">Drying Technology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Adsorption isotherm</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork granules</style></keyword><keyword><style  face="normal" font="default" size="100%">moisture contents</style></keyword><keyword><style  face="normal" font="default" size="100%">Monolayer</style></keyword><keyword><style  face="normal" font="default" size="100%">Surface area</style></keyword><keyword><style  face="normal" font="default" size="100%">Water activity</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2009///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.tandfonline.com/doi/abs/10.1080/07373930802605990</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">237 - 247</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Some special thermal and mechanical treatments may completely modify the composition, and the structure of organic material changes its interaction with water. In the case of the instant controlled pressure drop (DIC) technique, the main modification, which is structure expansion and high porosity, allows the product to generally reduce moisture activity. In the special case of cork granules, the impact of DIC in terms of porosity is completely absent and expansion is linked to a tear effect obtained from only the large size granules. In order to characterize this type of treatment, we considered natural and DIC-treated cork granules and determined moisture adsorption isotherms at three different temperatures (25, 40, and 60°C) and different water activity levels ranging from 0.05 to 0.9 using the static gravimetric method. We used three samples of the same cork variety with 0.5?1 mm, 2?4 mm, and 4?6 mm as granule diameter. The adsorption isotherms of both natural untreated and DIC-treated cork whatever granules display a sigmoid form type II isotherm, with equilibrium moisture contents at constant water activity decreasing when temperature increases. The impact of DIC treatment depends of cork shape; the larger the shape, the lower the water activity for the same water content. Such a result is linked to the modification of structure. Thus, for the smallest shape, DIC implying only low thermal effect without any structure modification allows cork to lightly increase its water activity compared to the untreated samples. With higher shape cork granules, as DIC treatment induces a tear effect and some expansion, activity of water is lower for the same water content. For describing the experimental data of adsorption isotherms, we used GAB, BET, and Henderson models. We found the GAB to be the most suitable model with predicted values higher than those obtained using the BET model. We note that monolayer moisture content values increase in the case of big shape cork granules after having been treated by DIC.</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue><notes><style face="normal" font="default" size="100%">doi: 10.1080/07373930802605990doi: 10.1080/07373930802605990The following values have no corresponding Zotero field:&lt;br/&gt;publisher: Taylor &amp; Francis</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Karade, Sukhdeo R.</style></author><author><style face="normal" font="default" size="100%">Irle, Mark</style></author><author><style face="normal" font="default" size="100%">Maher, Kevin</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Influence of granule properties and concentration on cork-cement compatibility</style></title><secondary-title><style face="normal" font="default" size="100%">Holz als Roh- und Werkstoff</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">cement</style></keyword><keyword><style  face="normal" font="default" size="100%">composites</style></keyword><keyword><style  face="normal" font="default" size="100%">Cork granules</style></keyword><keyword><style  face="normal" font="default" size="100%">Density</style></keyword><keyword><style  face="normal" font="default" size="100%">hydration (voyant)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2006///</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com/index/10.1007/s00107-006-0103-2</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">64</style></volume><pages><style face="normal" font="default" size="100%">281 - 286</style></pages><isbn><style face="normal" font="default" size="100%">0010700601032</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Cork granules are produced as by-products and waste by the cork processing industries that make ‘bottle stoppers’ as a main product. These granules are of low density and could be used as lightweight aggregates for making concrete. This paper describes an investigation carried out to assess the compatibility of cork granules with cement for the manufacture of lightweight cementitious composites. Five different grades of cork granules varying in terms of size and density were investigated. The effects of extractives, particle size and density of the cork granules were studied. The results indicate that these parameters affect cement hydration in a complex way. At lower concentrations of cork (10%), only the extractives have an inﬂuence on hydration behaviour. At higher cork concentrations (20% and 30%), however, particle size and density also affect the compatibility. Nevertheless, cork granules are found to be compatible with cement.</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue></record></records></xml>