Applicability of Self Consolidating Concrete for Use in Precast Bridge Beam Construction
Use of self consolidating concrete (SCC) has become popular
with nonstructural applications. In an effort to assess the structural applicability
in precast prestressed bridge construction a research program was conducted.
SCC and conventional high early strength concrete (HESC) were compared through
an extensive series of plastic and hardened material tests, and through the
examination of full-scale SCC and HESC bulb tee beams. Two mix designs were
developed using similar aggregates and cements with variations in admixtures
and batch weights. The SCC design and conventional mix design produced comparable
strength gain, modulus of rupture, splitting tension, shrinkage, creep, hardened
and plastic air, freeze thaw resistance, and chloride permeability. Results
indicate that the SCC mix design meets the requirements for DOT use in PA,
NJ, NY, VA, and MA. Four bulb tee beams were fabricated and non-destructively
evaluated. Measurements taken during release of prestress indicated that the
beams have a transfer length lower than PCI recommendations. Cost benefit
analysis of fabrication time, material cost, and aesthetics indicated a cost
savings for SCC over conventional high early strength material.
Clay Naito, Principal Investigator
Greg Parent, Graduate Student Researcher
Geoffrey Brunn, Research Assistant
Pennsylvania Infrastructure Technology Alliance
Schuylkill Products, Inc.
Degussa Admixtures, Inc.
Prestressed Concrete Association of Pennsylvania
Federal Highway Administration
Maryland State Highway Administration
New Enterprise Stone & Lime Co.
New Jersey DOT
New York State DOT
1. Naito, C., Brunn, G., Parent, G., and Tate, T., "PITA Project PIT-457-04
Comparative Performance of High Early Strength and Self Consolidating
Concrete for Use in Precast Bridge Beam Construction - Final Report," ATLSS Report No.05-03,
ATLSS Center, Lehigh University, June 2005, 102 pages.
2. Naito, C., and Hoover, M., "Applicability of Self Consolidating Concrete
for Use in Precast Bridge Beam Construction," Fourth International RILEM
Symposium on Self-Compacting Concrete, October 30-November 2, 2005, Chicago, Illinois.
Page Last Updated Wednesday, 29-Jun-2005 12:06:47 EDT