La arquitectura de la Obra Sindical del Hogar en la ciudad de Albacete: 1941-1981

En este estudio se presenta y analiza, proyectándola en su contexto, la producción de vivienda protegida acometida por la Obra Sindical del Hogar en la ciudad de Albacete, desde la creación de este organismo hasta su disolución, es decir, a lo largo de la dictadura franquista. La investigación viene, por un lado, a llenar el vacío que, en la bibliografía de referencia, existía, habida cuenta de que se trata de una arquitectura en su mayoría modesta, generalmente mal conservada, periférica y, en ocasiones, injustamente marginada que apenas ha interesado ni a los eruditos ni a los críticos. Por otro lado, el trabajo se alinea con el interés disciplinar que, desde hace ya bastante tiempo, despierta en el panorama nacional la vivienda social, tema clave tanto en el quehacer profesional de los arquitectos como en el conocimiento del devenir de la historia de la arquitectura moderna española y sus relaciones, intercambios e influencias con el ámbito internacional. Así, se estudian y documentan seis promociones que abarcan desde la escala del barrio (Barrio Hogar Nacional Sindicalista, al oeste del casco urbano), hasta la actuación puntual en un solar (Gabriel Ciscar, al norte), pasando por actuaciones que juegan con varios bloques y su composición (grupos San Juan Bautista, Emperador Carlos V o Lope de Vega, al sur), culminando con la construcción de un nuevo barrio (Hermanos Falcó), al dictado tanto de los aires que respira el urbanismo europeo (1ª fase), como de la entrega sin reservas a la especulación inmobiliaria (2ª fase, no realizada).

Building from building waste: The development of an instrument to determine the circularity of materials from the existing building stock in order to maximise high quality reuse

On a global level the population growth and increase of the middle class lead to a growing demand on material resources. The built environment has an enormous impact on this scarcity. In addition, a surplus of construction and demolition waste is a common problem. The construction industry claims to recycle 95% of this waste but this is in fact mainly downcycling. Towards the circular economy, the quality of reuse becomes of increasing importance. Buildings are material warehouses that can contribute to this high quality reuse. However, several aspects to achieve this are unknown and a need for more insight into the potential for high quality reuse of building materials exists. Therefore an instrument has been developed that determines the circularity of construction waste in order to maximise high quality reuse. The instrument is based on three principles: ‘product and material flows in the end of life phase’, ‘future value of secondary materials and products’ and ‘the success of repetition in a new life cycle’. These principles are further divided into a number of criteria to which values and weighting factors are assigned. A degree of circularity can then be determined as a percentage. A case study for a typical 70s building is carried out. For concrete, the circularity is increased from 25% to 50% by mapping out the potential for high quality reuse. During the development of the instrument it was clarified that some criteria are difficult to measure. Accurate and reliable data are limited and assumptions had to be made. To increase the reliability of the instrument, experts have reviewed the instrument several times. In the long-term, the instrument can be used as a tool for quantitative research to reduce the amount of construction and demolition waste and contribute to the reduction of raw material scarcity.