94. Behaviour of steel fibre self-compacting concrete under biaxial loading

Title: 94. Behaviour of steel fibre self-compacting concrete under biaxial loading
Author(s): R.N. Mohamed, K.S. Elliott
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 625 - 630
Total Pages: 6
Nb references: 9
Language: English

Abstract: The objective of this study was to investigate the behaviour of steel fibre self-compacting concrete (SFSCC) and plain self-compacting concrete (SCC) subjected to uniaxial and biaxial compressive loading. End-hooked steel fibre with 35 mm length and volume percentages of 0.5 and 1.0 were incorporated in the mix design of SFSCC and SCC. 100 x 100 x 50 mm specimen blocks were prepared and tested. The test programme covered four principal stress ratios from 0 to 1. The biaxial ultimate strength envelopes for SFSCC and SCC were developed and the biaxial stress-strain responses were plotted, followed by discussion on failure modes. Test results show that SFSCC possesses higher strength than plain SCC in biaxial compression. The increase is as high as 55 percent in the case of 1 percent volume ratio at stress ratio of 0.5. Observation of failure modes reveals that splitting-type failure occurs in plain SCC, while shear-type failure is the norm in SFSCC. In overall, this study confirmed that the concrete strength under biaxial compression is higher than that under uniaxial compression. The SCC and SFSCC mix design will then be applied to the design of beam-half joint in precast concrete construction for the final goals of eliminating vibration work and reducing reinforcement congestion prior to concrete filling, thus provides a way of increasing productivity.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00