Browsing by Author "Gandini, A."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Environmental risks assessment and preventive conservation strategy for the Pórtico de la Gloria, Santiago de compostela Cathedral(CRC Press, 2013-01-01) Becherini, F.; Bernardi, A.; Vivarelli, A.; Pockelé, L.; de Grandi, S.; Gandini, A.; García, O.; Zubiaga, M.; Espada Suárez, J. C.; Sperandio, B.; LABORATORIO DE TRANSFORMACIÓN URBANA; Tecnalia Research & InnovationIn the framework of the Santiago de Compostela Cathedral Program a multidisciplinary investigation of the Pórtico de la Gloria was carried out between 2009 and 2011 to identify the main environmental risks and to develop a preventive conservation plan to be integrated in the general management strategy of the Cathedral. This study included historic and archivist research, structural studies, mineralogical analyses, biological sampling, cleaning tests, microclimatic monitoring. The main weathering factors and the related damage processes were identified. Results have shown that the main responsible for the observed damage was the infiltration of rainwater through the roof, due to cracks in the structure of the Cathedral. Other environmental factors having a remarkable impact on the state of conservation of the polychrome and its substrate were the solar radiation, the thermo-hygrometric cycles, the particle deposition and the biological growth. Solutions were suggested to improve the environmental conditions, thus reducing further damage.Item Retrofitting of masonry vaults with composite materials(CRC Press/Balkema, 2016) Garmendia, L.; San-Mateos, R.; García, D.; Gandini, A.; San-José, J. T.; Marcos, I.; Van Balen, Koen; Verstrynge, Els; Van Balen, Koen; Tecnalia Research & Innovation; E&I SEGURAS Y RESILIENTES; LABORATORIO DE TRANSFORMACIÓN URBANAExternally Bonded composite materials are fast becoming the standard solution for structural strengthening, substituting traditional techniques (reinforced concrete, steel, etc). Polymer-reinforced fibres are now commonly applied to buildings for structural retrofitting purposes. These materials add greater tensile strength to structures, at the expense of a slight increase in weight. However, they also have other drawbacks as lack of water vapour permeability and brittle behaviour, which are not desired in the conservation of heritage buildings. Alternative to this composite materials are inorganic matrix-based composite materials which show advantageous properties and solve some of the drawbacks associated with organic matrices. This research presents long steel fibres and basalt textiles embedded in inorganic matrix to produce mortar-based composite. Initially, a mechanical characterization of the individual components and the resulting composite material was performed. Afterwards, real-scale (3m span) brick masonry vaults were strengthened by means of these composite materials and tested up to failure, in order to demonstrate their mechanical effectiveness. The experimental campaign demonstrates that composite mortar is an effective alternative to polymeric composites for the reinforcement of masonry brick vaults, which is physically compatible with masonry structures and easy to apply.