Round-robin analysis of the RILEM TC 162-TDF beam-bending test: Part 3 - Fibre distribution

Title: Round-robin analysis of the RILEM TC 162-TDF beam-bending test: Part 3 - Fibre distribution
Author(s): RILEM TC 162-TDF, B. I. G. Barr, M. K. Lee, E. J. de Place Hansen, E. Erdem, D. Dupont, S. Schaerlaekens, B. Schnütgen
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 36
Issue: 263
Issue date: 2003-11-01
Publication year: 2003
Pages: 631 - 635
Total Pages: 5
Nb references: 7
Language: English

Abstract: A round robin test programme was executed amongst several laboratories on the beam test recommended by the RILEM TC 162-TDF [1].
In the proposed test method, the mid-span deflection is to be measured on both sides of the beam (referred to as delta1 and delta2).
A systematic fibre counting exercise was carried out on several beam specimens to investigate whether there is a correlation between differences between delta 1 and delta2 and the fibre distribution.
The findings of the investigation suggest that differences between delta1 and delta2 are not strongly linked with the fibre distribution regardless of concrete strength.
It is likely that this phenomenon arises because the supports and loading points have enough degrees of freedom to accommodate any unevenness on the specimen surface.
This reflects well on the robustness of the proposed test method as it means that the proposed boundary conditions are able to adapt and tolerate (to a certain degree) surface non-uniformity.
However, it is also suggested that significant differences between delta1 and delta2 may be brought about by experimental errors.
The fibre count also reveals that toughness increases with the number of fibres across the critical section.

Online publication: 2003-09-27
Classification: RILEM Technical Committees
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13955