Design of ductile wood fibre cement based material

Title: Design of ductile wood fibre cement based material
Author(s): M. Guadalupe Sierra Beltran and E. Schlangen
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: 113 - 120
Total Pages: 8
Nb references: 12
Language: English

Abstract: When a brittle cement matrix is reinforced with fibres the composite’s toughness improves and a ductile behaviour could be developed. Wood fibres are currently being studied as a less energy-intensive alternative to synthetic fibres that have been successfully applied in reinforcing cementitious materials. In order to maximize the potential of wood fibres as reinforcement the fibre-matrix interface is being studied. The bonding will depend on: physical and chemical properties of the bundles, water/cement ratio of the matrix and its admixtures, curing conditions and age. One common way to determine important interface parameters such as chemical bond, frictional bond and slip-behaviour, either softening or hardening, is from a single fibre pull-out test. Therefore pull-out tests have been conducted using different matrices and softwood fibres. The effects of air-curing and water-curing are evaluated, as well as the influence of fibre embedment lengths. Beside pull-out tests the fibre-matrix interface is also evaluated through Environmental Scan Electron microscope ESEM, CT-scan images and optical microscopes. The results from these tests are used to design a ductile wood fibre cement based material. The composite is tested and it is shown that by tailoring the properties of the fibres and the cement matrix a ductile material can be achieved.

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

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