Tension-softening behavior and chloride ion diffusivity of cracked ultra high strength fiber reinforced concrete

Author(s): K. Hashimoto, T. Toyoda, H. Yokota, K. Kono, T. Kawaguchi
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 257 – 264
Total Pages: 8
Language: English

Abstract: 
Ultra high strength fibre reinforced concrete has high ductility, strength and durability compared to normal concrete. When steel fibre is corroded, however, the high performance may be degraded. This study aims to experimentally investigate the tensile performance of UFC after crack occurrence under corrosive environment. As the results, corrosion of steel fibre and chloride ion penetration in UFC without an initial crack did not occur significantly. On the other hand, more corrosion products on steel fibre are detected near the surface of seawater when UFC has a wider initial crack. Additionally, cracks due to external loading propagated more widely and chloride ions distributed along the cracks in UFC with a wider initial crack. Also, corrosion initiation of steel fibre increased tensile stress carried by UFC regardless of the initial crack width, and it was made clear how variations in corrosion of steel fiber affected degradation of tensile characteristics of UFC.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00