Browsing by Keyword "Bonding"
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Item Mechanical expectations of a high performance concrete based on a polymer binder and reinforced with non-metallic rebars(2008-10) San-José, José T.; Vegas, Iñigo J.; Moisés Frías, Frías; GENERALA high performance concrete, known as polymer concrete, made up of natural aggregates and an orthophthalic polyester binder, reinforced with non-metallic bars (glass reinforced polymer) has been studied. The material is described at micro and macro level, presenting the key physical and mechanical properties using different experimental techniques. Furthermore, a full description of non-metallic bars is presented to evaluate its structural expectancies, embedded in the polymer concrete matrix. Given the closed porosity obtained in polymer concrete, its microstructure continuity and organic nature of the binder, this material is highly protected against atmospheric conditions, corrosion and chemical attacks. The present research work concludes how the structural compatibility, between polymer concrete and non-metallic bars, is obtained in the monotonic bonding tests by providing higher adherence values than traditional reinforced concrete.Item New light and highly-damped bonded structures for noise and vibration reduction(2004) Zatarain, M.; Villasante, C.; Sedano, A.; Bueno, R.; Tecnalia Research & InnovationThe current trend with machine tool structures is the reduction of weight of their moving parts. The present paper looks at a method for achieving this, namely that of bonding rigid materials, whether or not of metal. Special emphasis is laid on achieving structures with a high damping ratio. The method makes it possible to combine materials and thicknesses, and produce closed, ribbed sections. To assess the behaviour of these structures it was necessary to develop a tool that adds to the features of a finite-element system. With this tool it is possible to assess not only rigidity and mass, but also damping. Various glues were tested, so that those providing optimum rigidity and damping may be used. The prototypes demonstrate the validity of the technology of bonding and of the method of verification.