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Este trabajo eval??a las posibilidades cer??micas de las margas de la Formaci??n Carbonero para fabricar materiales\udcer??micos de construcci??n de alto valor a??adido. Litol??gicamente, la Formaci??n Carbonero est?? formada por tres miembros: a) Inferior Margoso, b) Intermedio Radiolar??tico\udy c) Superior Turbid??tico. Las muestras estudiadas son ricas en filosilicatos (> 39%) y calcita. Los contenidos en cuarzo\udy feldespatos son bajos (< 27%). Los filosilicatos mayoritarios son el interestratificado illita-esmectita (14-50%) y la illita (32-74%). Caolinita, clorita y paligorskita est??n en peque??as cantidades. Los mayores contenidos en CaO est??n en las margas de los Miembros Inferior e Intermedio\ud(18-27%). Las margas molidas presentan similares proporciones granulom??tricas de las fracciones < 2 ??m y de la situada entre 2 y 20 ??m. La fracci??n > 20 ??m est?? ausente.\udLa plasticidad de las margas es baja, condicionando que su moldeo deba ser exclusivamente por presi??n. Los altos\udvalores de contracci??n lineal y absorci??n de agua entre 800 y 1.000 ??C son poco apropiados para la industria cer??mica.\udLas mezclas de estos materiales con diferentes proporciones de materiales complementarios permitir??an la fabricaci??n\udde baldosas cer??micas de color claro por prensado.This paper assesses the aptness of Carbonero Formation\ud(in the Spanish province of Ja??n) marls for the manufacture\udof high added value ceramic construction materials.\udLithologically speaking, the Carbonero Formation comprises\udthree members: a) a marly lower member; b) a\udradiolaritic middle member; and c) a turbiditic upper\udmember. The samples studied were rich in phyllosilicates\ud(> 39%) and calcite. The quartz and feldspar contents\udwere low (< 27%). The majority phyllosilicates were\udillite-smectite mixed layers (14-50%) and illite (32-74%).\udKaolinite, chlorite and palygorskite were also detected.\udThe highest CaO content was found in the marls in the\udlower and intermediate members (18-27%). The particle\udsize distributions of ground marls were similar for the <\ud2 ??m and 2-20 ??m fractions. The > 20 ??m fraction was\udabsent. Due to their low plasticity, most Carbonero Formation\udmarls can only be pressure moulded. Their high\udlinear shrinkage and water absorption values when fired\udat 800 to 1,000 ??C make them poorly suited for use in\udthe ceramic industry. Blends of these marls with different\udproportions of supplementary materials may be apt\udfor manufacturing light shades of pressed ceramic tile

Aplicabilidad de las margas de la Cordillera Bética (sur de la provincia de Jaén) para la fabricación de baldosas cerámicas prensadas