Structural Stay-in-place Formwork of Textile Reinforced Cement for Concrete Beams

Title: Structural Stay-in-place Formwork of Textile Reinforced Cement for Concrete Beams
Author(s): S. Verbruggen, O. Remy, J. Wastiels
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-106-3
e-ISBN: 978-2-35158-107-0
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 185 - 192
Total Pages: 8
Nb references: 3
Language: English

Abstract: A preliminary analysis and feasibility study is performed of structural stay-in-place formwork made of glass fibre reinforced inorganic phosphate cement (IPC). High fibre contents (20% in volume and more), which can be obtained with fibre mats, allow for thin lightweight formworks, which can (partially) replace the bending and shear reinforcement of concrete beams. As a comparison, a fully steel reinforced beam, a fully glass fibre reinforced IPC supported beam, and a combined beam with longitudinal steel reinforcement and glass fibre reinforced IPC formwork as shear reinforcement are designed. The calculation shows that the amount of glass fibre reinforced IPC necessary to meet the deflection constraints in the serviceability limit state is approximately the double of the amount needed in the ultimate limit state. Bending experiments, performed on beams of 2,30 m span, show that when buckling of the thin walled structural formwork is prevented, the beams show a yielding behaviour similar to the one of standard steel reinforced beams. An important observation during these tests was that the cracking moment of the concrete was more or less doubled, which resulted in a much lower deflection than calculated. This means that the section of glass fibre reinforced IPC calculated to meet the ultimate limit state would be sufficient for the serviceability limit state as well.

Online publication: 2010-10-21
Publication type : full_text
Public price (Euros): 0.00