Abstract
This study examined the strength and fracture mechanics properties of ultra high strength fiber reinforced concrete with shrinkage reducing agent. Furthermore, the effects of the addition of shrinkage reducing agent on the crack initiation load and crack width in RC members using the ultra high strength fiber reinforced concrete were investigated by double-pulling test. The specimens with cracks which were caused by double pulling during the loading test were immersed in synthetic seawater for 12 months to observe corrosion of internal steel bars. The results showed that the addition of shrinkage reducing agent caused increases in fracture energy and initial crack strength, thereby inhibiting increase in crack width in the RC members using the ultra high strength fiber reinforced concrete. It was also found that no corrosion occurred in the internal steel bars after 12 months of immersion.
