Textile Reinforced Concrete – Realization in applications
Textile Reinforced Concrete (TRC) is a composite material made of open-meshed textile structures and a fine-grained concrete. Comparable to steel reinforcement the textile fabric bears the tensile forces released by the cracking of the concrete. Only a minimal concrete cover is required for the bond of the textile fabrics. Thus, the application of TRC leads to the design of filigree and lightweight concrete structures with high durability and high quality surfaces. In recent years, TRC has been successfully employed for the production of ventilated facade systems. Current investigations enlarge the application range of TRC to facade systems with large spans and load-bearing structures. In this paper, the investigations on self-supporting and structural sandwich panels regarding production methods, results of bending and shear tests, tests on sound insulation and fire resistance as well as first prototypes of slender frames and shell elements are presented.
Acta Polytechnica CTU Proceedings
A newly developed reference dental implant specimen type was subjected to numerical simulations of osseointegration. The goal of these tests was to optimize the geometry of the implant so as to reduce local stress concentrations and provide a better flow of stress through the whole implant body. Conditions for osseointegration were considered when evaluating the anchoring system of the implant in regard to its placement in the human cancellous and cortical bone. Numerical simulations showed that stress concentrations occur mostly in the upper cylindrical part of the implant. By increasing the width of this cylindrical part, we were able to reduce the maximum values of von-Mises stress by 20 %.
Textilbewehrter beton unter brandbeanspruchung
Textile-reinforced concrete has great potential for use in lightweight, thin-walled structural components. Since such elements participate directly in load transmission, sufficient fire resistance is often desirable. Experience until now, however, has been limited with the behaviour of structurally-applied thin-walled textile concrete elements subjected to fire. Four fire tests have accordingly been performed on textile-reinforced concrete sections (I-profiles), in which one side of the sections was exposed to fire. The textiles tested were AR glass, carbon, and carbon coated with styrene butadiene. These experiments disclosed that the load bearing behaviour of textile-reinforced structural components in fire greatly depends on the textile used, their bond to the concrete, and the behaviour of the concrete under high temperatures.