%0 Journal Article
%A Artigas, Rosana
%A Rodas González, Magdalena
%A Sánchez Jiménez, Carlos J.
%A Mas Mayoral, José Ramón
%A Dondi, Michele
%A Arribas Mocoroa, José
%T Clayey materials from the Sierra de laDemanda Range (Spain): their potential asraw materials for the building ceramicsindustry
%D 2005
%@ 0009-8558
%U https://hdl.handle.net/20.500.14352/50333
%X This work describes the possible use of thick Early Cretaceous clay deposits, whichoccur in the southern sector of the Sierra de la Demanda range, as raw materials in the manufactureof ceramic articles. The global mineralogical composition is characterized by high proportions ofphyllosilicates and quartz with variable quantities of feldspars, carbonates and hematite. The claymineralogy differentiates two types of raw materials: illitic clay and kaolinitic-illitic clay. Agranulometric distribution in the 2ÿ60 mm fraction, good behaviour during the drying stage andacceptable results in firing tests confirmed that most samples can be utilized as raw material in thebuilding ceramics industry. The range of suitable firing temperatures for these materials is950ÿ1000ëC, a temperature which needs to be raised for samples with a high percentage of kaoliniteand quartz. Moreover, other materials with abundant calcite (20ÿ30%) are suitable for use asmodifiers of some properties or colour.
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