Fichas de lectura
| Ficha 5 |
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| Título |
The potential of advanced textiles for fabric formwork
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| Autor |
Julie Brennan, Remo Pedreschi, Pete Walker y Martin Ansell
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| Publicación |
agosto 2013
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| Sección |
Construction Materials (166), pp. 229–237.
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| Editorial |
ice proceedings (Institution of Civil Engineers)
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| Tipo |
Artículo de revista
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| Resumen |
Este artículo discute acerca de los encofrados flexibles desde una perspectiva a partir de uno de sus componentes, la tela. Donde el desarrollo de métodos de fabricación cada vez más sofisticados, permite obtener textiles capaces de ampliar el campo de acción del moldaje flexible, ya sea en lograr nuevas formas o mejorar las propiedades del hormigón resultante.
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| Citas |
- " Current formwork textiles... .In architectural applications the texture and pattern of fabric is used to create many different types of surface aesthetic effects. Surface texture and finish of formwork panels is mainly determined by the fibre and yarn type."(p. 230)
- " The variety of textile constructions produces a range of permeability and porosity variations, thus affecting the quality and strength of the concrete, which in turn alters the resulting surface quality of formed concrete. The ideal characteristics of formwork textiles are as follows:high tensile strength and stiffness, controlled permeability and porosity, resistance to tearing and bursting and low surface adhesion to the concrete & low creep modulus."(p. 230)
- " Formwork textile structures described in this paper are distinguishable from fibre-reinforced composite textiles owing to the fabric’s ability to perform dual functionality as both reinforcement and surface formwork mould simultaneously."(p. 233)
- " New woven formwork structures such as multiple-layer geogrids and near-net-shaped reinforcements are designed with tailored anisotropic properties to provide alternative performance, permeability behaviour and surface finish. These possess different levels of in-fill retention and containment, porosity and conformability within a given area of the fabric. This enables reinforcement and their subsequent mechanical properties to be manifested where required." (p. 232)
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| Ficha 6 |
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| Título |
Concrete structures using fabric formwork.
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| Autor |
John Orr, Antony Darby, Tim Ibell, Mark Evernden.
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| Año |
2011
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| Sección |
The Structural Engineer, (89). pp. 20-26.
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| Editorial |
University of Bath, UK.
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| Tipo |
Artículo de revista
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| Resumen |
Este artículo se aborda la temática del moldaje flexible a partir del diseño y luego de la contrucción, además ilustra con ejemplos los temas tratados. También hace algunas comparaciones con moldajes tradicionales rígidos, destacando ventajas en cuanto a costos, energía y cantidad de materiales usados.
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| Citas |
- "Yet fabric formwork does not simply facilitate reductions in material use. Forming concrete in a permeable mould allows air and water to escape from the formwork to provide a high quality surface finish that can be readily distinguished from an identical concrete cast against an impermeable mould." (p. 3)
- "The ubiquitous use of orthogonal moulds as formwork for such structures has resulted in a well-established vocabulary of prismatic forms for concrete structures, yet rigid formwork systems must resist considerable fluid pressures, may consume significant amounts of material and can be expensive to construct. Moreover, the resulting member requires more material and has a greater deadweight than one cast with a variable cross section.."(p. 3)
- "The critical aspect of fabric formwork for determining shape and therefore aesthetic is the fabric itself. Although almost any woven fabric can be used as formwork for fabric cast concrete, tensile strengths in both warp and weft directions must be sufficient to hold the wet concrete and a low creep modulus is desirable to limit formwork deformations during casting and curing." (p. 4)
- "Fabric formwork provides a fundamentally simple construction method and an optimised beam can be formed using only a sheet of fabric and modest supporting frame. The fabric, as discussed above, is completely reusable, either for a repeat element or in an entirely new beam geometry." (p. 6)
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¿Es posible, a partir de nuevas tecnologías, disminuir la huella de carbono producida por el uso de hormigón y con ello acercarnos a una arquitectura sustentable?.
Eber Sáez, arquitectura, David Jolly
