Polymeric concrete for wind generator towers or other large structural applicatons

Inactive Publication Date: 2009-12-24
HYTOWER LDA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The present invention provides a solution for building large scale towers, including towers beyond 80 m height, reducing substantially the maintenance needs, avoiding the logistics

Problems solved by technology

However, as increased tower height implies bolder dimensioning of the tower diameter, of the wall thickness, or both, in order to assure the necessary stiffness, this solution has met increasing limitations due to materials costs and also manufacture and transport limitations due to dimensions, as a diameter of 4.2 m is the maximum allowed in many roads due to over-crossings.
Lattice towers need more ground space and imply more time consumption for on site assembly.
They also have increased inspection and maintenance costs.
A variant hybrid construction, made of a lower section of steel lattice and an upper section of steel wall, has been proposed as in DE 103 39 438 A1, but it requires expensive joints.
Hybrid variants with a concrete lower section, as in WO 2005/015013, improve the load-bearing capacity and easines

Method used

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  • Polymeric concrete for wind generator towers or other large structural applicatons
  • Polymeric concrete for wind generator towers or other large structural applicatons
  • Polymeric concrete for wind generator towers or other large structural applicatons

Examples

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Example

[0022]The tower, according to the invention, is built of two or more superimposed ring sections in conical or cylindrical form, each ring being built of one or more shell segments, these segments are joined by means of mechanical and / or chemical bonding and made of pre-cast polymeric concrete.

[0023]The segments are moulded after mixture of the binder and filler materials, as described above. The binder is a thermosetting resin like polyester resin, epoxy resin, phenolic resin, vinyl ester resin or others. Before filling the moulds with polymer concrete, chopped fibres mixed with the thermosetting resin can be sprayed onto the mould external wall, to enhance the tensile resistance of the segment.

[0024]The rings have specially designed ends in order to assemble into each other when building a tower. Between two superimposed rings, as seen in FIG. 4, the one in the bottom has the top end shaped like a step with, from the interior to the exterior, first a bottom horizontal surface (12),...

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Abstract

The present invention relates to towers for wind generators or other large structural applications and uses a new construction concept, based on polymeric concrete. Polymeric concrete is composed of thermosetting resin and aggregates such as sand or gravel. Polymeric concrete has low maintenance costs and exceptional high resistance to corrosion, thus justifying its main usage in non-structural applications. Additionally, polymeric concrete has been used as mortar in the rehabilitation of civil structures, especially retrofitting of bridges and heritage buildings. Its advantages for these applications are the adherence to the traditional materials, higher compressive strength than traditional concrete and low specific weight. The tower (1), according to the invention, is built of two or more superimposed ring sections (2) in conical or cylindrical shape, each ring (2) being built of one or more shell segments and the said segments being fixed by means of mechanical and/or chemical couplings, and being made of prefabricated polymeric concrete.

Description

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Claims

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Application Information

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Owner HYTOWER LDA
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