Post-tensioned concrete with fibers for long strips
AssigneesNV Bekaert SA, Ccl Stressing International Ltd
InventorsHendrik THOOFT, Gerhard VITT, Carol HAYEK
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Abstract
The present invention concerns a concrete strip, the strip comprising conventional concrete and a combined reinforcement of both post-tension steel strands and fibers, said post-tension steel strands—having a diameter ranging from 5 mm to 20 mm, —having a tensile strength higher than 1700 MPa, said fibers being either steel fibers and being present in a dosage ranging from 5 kg/m3 to 90 kg/m3 or being non-steel fibers and being present in a dosage ranging from 0.6 kg/m3 to 25 kg/m3, whereby the strip has a thickness, whereby further the length of the strip is according to the formula:length of the strip>30×strip thickness.
Claims15
A concrete strip, the strip comprising conventional concrete and a combined reinforcement of both post-tension steel strands and fibers,
- said post-tension steel strands
- having a diameter ranging from 5 mm to 20 mm,
- having a tensile strength higher than 1700 MPa,
- said fibers being either steel fibers and being present in a dosage ranging from 5 kg/m3 to 90 kg/m3 or being other non-steel fibers and being present in a dosage ranging from 0.6 kg/m3 to 25 kg/m3,
- whereby the strip has a thickness, whereby further the length of the strip is according to the formula:
- length of the strip>30×strip thickness.
A method for casting particularly long strip according to the invention as described herein, especially comprising the steps of:
- using conventional concrete and a combined reinforcement of both post-tension steel strands and fibers,
- said post-tension steel strands
- having a diameter ranging from 5 mm to 20 mm,
- having a tensile strength higher than 1700 MPa,
- said fibers being either steel fibers and being present in a dosage ranging from 5 kg/m3 to 90 kg/m3 or being other non-steel fibers and being present in a dosage ranging from 0.6 kg/m3 to 25 kg/m3,
- and casting a strip that has a thickness, whereby further the length of the strip is according to the formula:
- length of the strip>30×strip thickness.
Dependencies are inferred from the claim text.