Installation of Barrier Rail and Wearing Surface  09-16-2002
Overall view of slipform barrier placement. Close-up of "mule" for slipform barrier.
Finishing the exterior face of slipformed barrier. Looking down on mule showing reinforcing steel clearance.
Contractor using deck stripping buggy to remove ramp plates from girders on eastbound bridge. Concrete placement on expansion joint blockouts at Pier 6.
Concrete consolidation is critical beneath the expansion joint finger plates. Removing the overhang jacks along the westbound bridge.
View along north fascia of the westbound bridge showing overhang jacks to be removed. Conduit in north barrier curb on the westbound bridge.
Close-up view of sliding expansion coupler in the conduit. Finishing the barrier rail concrete on the westbound bridge.
Sawing a joint in the barrier curb at pier locations - caution must be used to avoid cutting into the embedded conduit. Steep slopes necessitated the extension of macadam stone limits.
Looking down (northwest) at the macadam stone extension. Macadam stone extension with erosion stone placed at the lower edge. (Macadam stone is used to control erosion around the abutments of piers).
Portland cement slurry is used to bond wearing surface to the subdeck. Brooms are used to spread slurry on the subdeck prior to placing the wearing surface.
A mobile mixer is used to combine rock, sand, cement and water for the wearing surface. Buggy is being loaded at the mobile mixer.
A Georgia Buggy is used to transport the wearing surface concrete. The wearing surface mix is deposited on the subdeck.
Shoveling the wearing surface concrete at Pier 1 expansion joint. A vibrating screed is used to strike off wearing surface concrete at the expansion joint.
Density of the wearing surface concrete is checked with a nuclear gauge. The contractor is finishing wearing surface concrete at the expansion joint.
The wearing surface concrete is curing with a white latex spray. Wearing surface concrete is cured with wet burlap following the latex spray.
The wearing surface is sawcut to provide neat lines for placement of the adjacent portion.
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