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Verification of strength durability models for glass fibre textile reinforced cement

Title: Verification of strength durability models for glass fibre textile reinforced cement
Author(s): J. Wastiels and P. Van Itterbeeck
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 225 - 232
Total Pages: 8
Nb references: 10
Language: English

Abstract: The brittleness of cementitious materials can be overcome by the introduction of fibres.
Often glass fibres are used because of their stiffness, availability and low cost. Despite significant material optimisation over recent decades, as well for matrix as for fibres, durability is still an issue. Four strength durability models available in the literature are discussed: a linear or kinetic model, a square-root or diffusion model, a nonlinear diffusion model, and a combined kinetic-diffusion model. The parameters of these models are calibrated with a large dataset of strength results from accelerated ageing tests obtained by immersion of specimens in water at a range of temperatures for various durations.
A model selection method is proposed which allows determining the best approximating model for a dataset at hand by applying a statistical method, Akaike’s Information Criterion.
This criterion is weighing up the complexity of adding more model parameters against the enhanced fit to the experimental data. The effect of scatter of the experimental results on the uncertainty of the model prediction is also addressed.

Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00

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