[en] Construction and demolition waste, due to its composition, is normally disposed at landfills, alternatively, it can be used as backfill materials, filler in roads or graded aggregates. However once crushed and milled, homogenization of the material is achieved allowing its processing as a ceramic material, therefore it is possible to use powder technology methods and procedures. This doctoral thesis focuses on the study of C&DW in order to achieve an integral use of this type of waste as a substitute for traditional ceramics and even some technical ceramics. After an initial washing stage, C&DW is processed. The homogenous product obtained after a milling process using a ball mill is then subject to a gradation test. Pieces were formed in three different ways: Starch moulding, uniaxial compaction and extrusion. Sinterability curves were plotted for the uniaxial moulding and compacting processes and the microstructures appeared were observed. Once the material has been characterized and the properties of the 100 % C&DW pieces evaluated, the behaviour of C&DW mixed with pure kaolin in a percentage of 50 % was studied. The powdery mixed product was characterized by gradation test and chemical analysis, BET, etc. The microstructure was also analysed using optical and electron microscopy (SEM-EDX), in order to research the chemical composition, the different phases generated and the possible reactions that could occur. Porosity was determined using image analysis with the help of the ImageJ software, by interpreting its influence on the mechanical properties. Mechanical behaviour (Three point bending flexural test, compressive strength and hardness), reliability (using the Weibull modulus) and the wear resistance (by pin-on-disk type tests) were evaluated. The acoustic emission of pin on disk test was also evaluated, as well as the water absorption of the pieces. The results obtained have been satisfactory since the resulting materials in most cases present a behaviour similar or superior to the traditional ceramics and even with values close to the advanced ceramics. These materials can be considered as a particle reinforced ceramic matrix composite material.

[es] Los residuos de construcci?n y demolici?n por su composici?n se consideran un producto de desecho que tienen un uso secundario como rellenos de carreteras o zahorras, pero una vez triturados y molidos se consigue una homogeneizaci?n del material que puede ser procesado como un material cer?mico y por lo tanto se pueden utilizar m?todos y procedimientos de Tecnolog?a de polvos. Esta Tesis Doctoral se centra en el estudio de los RCDs con el fin de conseguir un aprovechamiento integral de este tipo de residuos como sustituto de las cer?micas tradicionales e inclusive de alguna cer?mica t?cnica. Los RCDs se procesaron tras una etapa de lavado, a continuaci?n en un molino de bolas se molieron homog?neamente, se hizo un estudio granulom?trico, se conformaron piezas de tres modos diferentes: moldeo con almid?n o Starch, compactaci?n uniaxial y extrusi?n. Se trazaron las curvas de sinterabilidad para los procesos de moldeo y compactaci?n uniaxial, y se observaron las microestructuras aparecidas. Una vez caracterizado el material y evaluadas las propiedades de las piezas 100% RCDs, se estudi? el comportamiento que ten?an los RCDs mezclados con caol?n puro en un porcentaje del 50%. Se caracteriz? la masa pulverulenta mediantes an?lisis granulom?tricos y qu?micos, BET, etc. y la microestructura mediante microscop?a ?ptica y electr?nica (SEM-EDX), con objeto de investigar la composici?n qu?mica, las distintas fases generadas y las posibles reacciones que pudieran tener. Se determin? la porosidad mediante an?lisis de imagen con la ayuda del programa ImageJ interpretando su influencia sobre las propiedades mec?nicas. Se evalu? el comportamiento mec?nico(resistencia a flexi?n en tres puntos, resistencia a compresi?n y dureza), la fiabilidad (a trav?s del m?dulo de Weibull) y la resistencia al desgaste, mediante ensayos del tipo ?pin-on-disk?, tambi?n se evalu? la emisi?n ac?stica de este ensayo, as? como la absorci?n de agua de las piezas. Los resultados han sido satisfactorios puesto que los materiales obtenidos presentan en la mayor?a de los casos un comportamiento semejante o superior a las cer?micas tradicionales e incluso con valores pr?ximos a las cer?micas avanzadas, pudiendo considerarse como un material compuesto de matriz cer?mica reforzado con part?culas.