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Materiaux 3D minces en beton a renforts textiles
In the field of concrete construction thin-walled three-dimensional structural elements are intended to perform a temporary task with clearly defined loading states of low intensity. Textile-reinforced fine-grained concrete produces high element stiffness. The required concrete matrix for such applications must have a dense and compact grain structure. It is evident that one is dealing with elements in large numbers, which have to be of low cost and be industrially produced. In order to meet these demands, a three-dimensional mould has to be automatically filled with a wet concrete matrix and stripped. The time the concrete matrix is in the mould must be kept to a minimum. A very wet matrix has to be used, so that the narrow mould is completely filled. The most efficient way of filling is by means of injecting the material. The wet matrix must set quickly in order to dismantle the mould and to use it again as soon as possible. The matrix is compacted and consolidated and the excess water is squeezed out. A low dosage of glass fibres in the fine-grained concrete matrix serves first as a process fibre, then as a reinforcing fibre in the green concrete and finally in the hardened matrix. The mould has to be designed such that its individual parts can be mechanically driven together and apart in a non-conflicting way and without damaging the moist concrete specimen. This production method is able to provide in a short time thin-walled structural components of arbitrary three-dimensional geometry. The individual processes can be automated and controlled. Bilingual document: French/English.
Materiaux 3D minces en beton a renforts textiles
In the field of concrete construction thin-walled three-dimensional structural elements are intended to perform a temporary task with clearly defined loading states of low intensity. Textile-reinforced fine-grained concrete produces high element stiffness. The required concrete matrix for such applications must have a dense and compact grain structure. It is evident that one is dealing with elements in large numbers, which have to be of low cost and be industrially produced. In order to meet these demands, a three-dimensional mould has to be automatically filled with a wet concrete matrix and stripped. The time the concrete matrix is in the mould must be kept to a minimum. A very wet matrix has to be used, so that the narrow mould is completely filled. The most efficient way of filling is by means of injecting the material. The wet matrix must set quickly in order to dismantle the mould and to use it again as soon as possible. The matrix is compacted and consolidated and the excess water is squeezed out. A low dosage of glass fibres in the fine-grained concrete matrix serves first as a process fibre, then as a reinforcing fibre in the green concrete and finally in the hardened matrix. The mould has to be designed such that its individual parts can be mechanically driven together and apart in a non-conflicting way and without damaging the moist concrete specimen. This production method is able to provide in a short time thin-walled structural components of arbitrary three-dimensional geometry. The individual processes can be automated and controlled. Bilingual document: French/English.
Materiaux 3D minces en beton a renforts textiles
Thin, 3D textile reinforced concrete materials
Friedrich, T. (author)
TUT Textiles a Usages Techniques ; 26-39
2002
14 Seiten, 4 Bilder
Article (Journal)
French , English
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