Title:
Case Study: Ultra High Performance Concrete with Steel Fibers for the Route 624 Bridge in Virginia
Author(s):
Celik Ozyildirim
Publication:
Symposium Paper
Volume:
280
Issue:
Appears on pages(s):
1-12
Keywords:
concrete, UHPC, ultra high performance concrete, durability, strength, permeability, crack control, ductility.
DOI:
10.14359/51683587
Date:
12/27/2011
Abstract:
Ultra high performance concrete (UHPC) containing steel fibers was used in five beams of the bridge on Route 624 over Cat Point Creek in Virginia. A test beam was also fabricated and tested to failure. The beam had strands but no shear stirrups. Test beam results indicated satisfactory load-carrying capacity. Preparation of the beams involved a longer mixing time and a two-stage steam curing to ensure optimum concrete properties. Testing of specimens at the hardened state showed that UHPC has high strength and high durability attributable to a very low water–cementitious materials ratio, low permeability, a high resistance to cycles of freezing and thawing, and tight cracks.