Browsing by Author "Santamaria, A."
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Item Analysis of the conditions to manufacture a MWCNT buckypaper/benzoxazine nanocomposite(2012-02-28) Chapartegui, M.; Barcena, J.; Irastorza, X.; Elizetxea, C.; Fernandez, M.; Santamaria, A.; POLIMEROS; EXTREMAT; COMPOSITEA study of the requirements necessary to fabricate novel MWCNT buckypaper/benzoxazine nanocomposites, based on rheological results, is presented. Best conditions to infiltrate the resin, without any diluents, in the buckypaper are selected from viscosity data obtained under time-temperature cycles. Infiltration results are analyzed using SEM microphotographs. The nanocomposite is obtained after an adequate curing process of the benzoxazine impregnated buckypaper. The mechanical and electrical properties of the nanocomposite are investigated. The obtained electrical conductivity values are several orders of magnitude larger than the values reported for conventional CNT/polymer nanocomposites.Item Novel bituminous mastics for pavements with improved fire performance(2012-05) Barral, M.; Garmendia, P.; Muñoz, M. E.; Palmillas, Z.; Romera, R.; Santamaria, A.; Villanueva, S.; Ingenieria del Fuego; ECOEFICIENCIA DE PRODUCTOS DE CONSTRUCCIÓNNovel bituminous mastic formulations with performing viscoelastic and mechanical properties and improved resistance to fire, are investigated. The practical performance of the mastics for pavement purposes is analysed. The study is focused on the effectiveness of different sepiolite clays and their mixtures, combined with the fire retardant action of aluminium trihydrate (ATH). Our results indicate that the performance against fire is favoured by the high porosity and density of the sepiolite, and by its lack of affinity with bitumen. Mixing two types of sepiolites we obtain a mastic which presents a synergism between the good cohesion/adhesiveness of one of the formulations and the improved fire performance of other one.