Residual bond stress of self-compacting concrete specimens after high temperature treatment

Author(s): K.G. Trezos, I.P. Sfikas
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 163-170
Total Pages: 8
Language: English

Abstract: 
Wide research on bond under ambient temperatures has been previously conducted, building confidence in Self-Compacting Concrete (SCC) over Normally Vibrated Concrete (NVC). Yet, the effect of high temperatures on SCC bond has not been sufficiently investigated.

The present study is evaluating the effect of high temperatures (300, 650 and 900°C) on bond characteristics (average bond stress, maximum bond stress and corresponding slip). Eight SCC mixtures with various water to binder ratios and silica fume levels of cement replacement and four NVC mixtures have been tested by performing pull-out tests.

It has been found that silica fume concretes are more prone to explosive spalling, but their bond stress levels are not affected for temperatures of up to 300°C. This temperature appears to affect the bond stresses for all other mixtures. The bond characteristics are significantly deteriorated for even higher temperatures, this effect being slightly stronger for SCC.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00