IMPROVING THE FIRST CRACK BEHAVIOUR OF TEXTILE REINFORCED CONCRETE

Author(s): W. Brameshuber and M. Hinzen
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 13-20
Total Pages: 8
Language: English

Abstract: The stress-strain-diagram of textile reinforced concrete is simply described by a tri-linear curve, beginning with a stiff increase until - first crack, a very weak slope in the cracking stage and - depending on the stiffness of the textile - the last part until fracture. The main question for the applicability of textile reinforced concrete is to reduce the drop of stiffness when the first crack occurs. In this contribution it will be shown that using different types of short fibres this weak point can be reduced in combination with the textiles. The conditions for improving the stress-strain behaviour by adding different kinds of short fibres or combinations of them to the matrix have been investigated. A criterion has been worked out to describe the deficit of load bearing capacity when the first crack occurs. This criterion is based on the first crack strength of the matrix, the bond quality between matrix and textile and the effectiveness of the short fibres. A concept is worked out for the oriented support of the textile by short fibres for crack bridging. An example of application of the model will be demonstrated.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00