The present research studied a set\u00a0of\u00a0phyllite\u00a0clays\u00a0from\u00a0several deposits in\u00a0southeast\u00a0Spain. These\u00a0phyllite\u00a0clays\u00a0have traditionally been used as sealing material to impermeabilize roofs, embankments, ponds, construction and waste landfill, with recent applications in the preparation\u00a0of\u00a0new mortars. However, studies on\u00a0thermal\u00a0behaviour and\u00a0ceramic\u00a0properties\u00a0of\u00a0phyllite\u00a0clays\u00a0have been scarce. The present research showed a summary\u00a0of\u00a0previous\u00a0characterization\u00a0studies on representative\u00a0phyllite\u00a0clays\u00a0from\u00a0these deposits with additional results. Mineralogical, by X-ray diffraction, and chemical, by X-ray fluorescence\u00a0characterization\u00a0of\u00a0these samples were summarized.\u00a0Thermal\u00a0analysis methods (DTA-TG and\u00a0thermal\u00a0diffractometry) were applied to achieve a more complete mineralogical\u00a0characterization. Several\u00a0phyllite\u00a0clay samples were selected for a\u00a0ceramic\u00a0study by firing pressed powdered samples up to 1300 degrees C. Sintered or vitrified materials, with porosities almost zero, were obtained\u00a0from\u00a0these\u00a0phyllite\u00a0clays\u00a0after firing at 1100-1200 degrees C, with apparent densities between 2.1 and 2.4 g cm(-3). Higher firing temperatures (> 1250 degrees C) produced deformation and expansion\u00a0of\u00a0the\u00a0ceramic\u00a0bodies. These results allowed obtain the vitrification temperature (T-v) and the temperature\u00a0of\u00a0the maximum bulk density (T-d). According to the previous mineralogical and chemical\u00a0characterization\u00a0and the values\u00a0of\u00a0these parameters, the\u00a0phyllite\u00a0clay samples were classified in three varieties, as follows: (1)Micaceous, characterized by predominant layer silicates, mainly muscovite or illite, alkaline elements (mainly K2O higher than 3.5 mass%) and lower values\u00a0of\u00a0both T(v)and T-d, (2)Quartzitic, with predominant quartz and SiO(2)and intermediate values\u00a0of\u00a0T(v)and T-d, and (3)Carbonaceous, characterized by predominant dolomite, medium contents\u00a0of\u00a0CaO and MgO and higher values\u00a0of\u00a0both T(v)and T-d. These results are interesting for the application\u00a0of\u00a0these\u00a0phyllite\u00a0clays\u00a0as\u00a0ceramic\u00a0raw materials.<\/p>\n","protected":false},"excerpt":{"rendered":"
The present research studied a set\u00a0of\u00a0phyllite\u00a0clays\u00a0from\u00a0several deposits in\u00a0southeast\u00a0Spain. These\u00a0phyllite\u00a0clays\u00a0have traditionally been used as sealing material to impermeabilize roofs, embankments, ponds, construction and waste landfill, with recent applications in the preparation\u00a0of\u00a0new mortars. However, studies on\u00a0thermal\u00a0behaviour and\u00a0ceramic\u00a0properties\u00a0of\u00a0phyllite\u00a0clays\u00a0have been scarce. The present research showed a summary\u00a0of\u00a0previous\u00a0characterization\u00a0studies on representative\u00a0phyllite\u00a0clays\u00a0from\u00a0these deposits with additional results. Mineralogical, by X-ray diffraction, and chemical,…<\/p>\n","protected":false},"featured_media":0,"template":"","autores":[],"grupos_de_investigacion":[140],"revistas":[1713],"anos":[885],"class_list":["post-25179","articulos_sci","type-articulos_sci","status-publish","hentry","grupos_de_investigacion-materiales-avanzados","revistas-journal-of-thermal-analysis-and-calorimetry","anos-885","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/25179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci"}],"about":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/types\/articulos_sci"}],"version-history":[{"count":0,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/25179\/revisions"}],"wp:attachment":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25179"}],"wp:term":[{"taxonomy":"autores","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fautores&post=25179"},{"taxonomy":"grupos_de_investigacion","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fgrupos_de_investigacion&post=25179"},{"taxonomy":"revistas","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Frevistas&post=25179"},{"taxonomy":"anos","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fanos&post=25179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}