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Textile reinforced concrete multilayer composite pipes
The effectiveness of the composite pipe is based on an optimized material functional distribution. A plastic pipe inside's first priority is the transportation of the fluids as well as a seal function. The plane surface of the plastic pipe has very good hydraulic qualities and a high resistance against chemical corrosion and fouling. The wall-thicknesses of the high-cost plastic pipes are reduced to a minimum. The newly designed composite pipe combines the positive properties of plastic pipes with the significantly increased strength of a textile reinforced fine grained concrete layer. The jacket of textile reinforced concrete consists of warp knitted fabrics made of alkaliresistant glass yarns. It bears the stresses from internal pressure as well as external loads (live loads, earth loads, etc). Very positive results were achieved by adding short glass fibers with rates of less than 1 Vol.-%. The wall-thickness of the interior plastic pipe may be reduced for the same or even higher internal pressure loads. A suitable formation of the textile reinforcement allows failure pressures of up to 6 MPa (60 bar). The application of the new composite pipes is supposed to occur in the field of water supply and sewage disposal. A manufactured production facility at laboratory scale allows the production of composite pipes by a winding technique. The manufactured specimens are tested on specially developed experimental equipment for measuring the extension under internal pressure loads. A further emphasis is placed on the examination under apex pressure load. The positive properties of the applied materials are combined ideally and compensate the respective disadvantages. That way, it is possible to reduce the amount of material that is necessary for both the inner plastic tube and the concrete reinforcement while the load bearing capacity of the sealed tubes is considerably improved.
Textile reinforced concrete multilayer composite pipes
The effectiveness of the composite pipe is based on an optimized material functional distribution. A plastic pipe inside's first priority is the transportation of the fluids as well as a seal function. The plane surface of the plastic pipe has very good hydraulic qualities and a high resistance against chemical corrosion and fouling. The wall-thicknesses of the high-cost plastic pipes are reduced to a minimum. The newly designed composite pipe combines the positive properties of plastic pipes with the significantly increased strength of a textile reinforced fine grained concrete layer. The jacket of textile reinforced concrete consists of warp knitted fabrics made of alkaliresistant glass yarns. It bears the stresses from internal pressure as well as external loads (live loads, earth loads, etc). Very positive results were achieved by adding short glass fibers with rates of less than 1 Vol.-%. The wall-thickness of the interior plastic pipe may be reduced for the same or even higher internal pressure loads. A suitable formation of the textile reinforcement allows failure pressures of up to 6 MPa (60 bar). The application of the new composite pipes is supposed to occur in the field of water supply and sewage disposal. A manufactured production facility at laboratory scale allows the production of composite pipes by a winding technique. The manufactured specimens are tested on specially developed experimental equipment for measuring the extension under internal pressure loads. A further emphasis is placed on the examination under apex pressure load. The positive properties of the applied materials are combined ideally and compensate the respective disadvantages. That way, it is possible to reduce the amount of material that is necessary for both the inner plastic tube and the concrete reinforcement while the load bearing capacity of the sealed tubes is considerably improved.
Textile reinforced concrete multilayer composite pipes
Lieboldt, M. (author) / Helbig, U. (author) / Engler, T. (author)
2006
10 Seiten, 11 Bilder, 3 Quellen
Conference paper
English
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