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Bridge Deck Concrete Placement  08-16-2002
Wind damage to eastbound deck overhang (photo taken 5/12/02). Wind damage to eastbound deck overhang (photo taken on 5/12/02).
Wind damage to eastbound deck overhang (photo taken on 5/12/02). Is it the fab four? From left: Brian Blair, Jensen Construction Co.; Doug McDonald, Iowa Department of Transportation; Mike Turk, Jensen Construction Co.; and Mike LaViolette, HNTB Corporation.
There are those who have and those who will -- almost everyone has been stuck in Hardin County mud at least once. Deck forms are constructed using lumber and plywood.
Reinforcing steel is in place for the first concrete pour on the deck. Reinforcing on the west approach span.
Welding shear studs to top flange of steel girders prior to placing deck concrete. Removal of workpad and causeway at Pier 4.
Ironworkers tying Pier 6 backwall reinforcing. Placing Pier 6 backwall concrete.
Stripping deck forms from beneath the eastbound roadway. Concrete pump and pipeline used for placing eastbound deck concrete.
Concrete placer used to distribute concrete uniformly on deck surface. Concrete finish machine screeds (scrapes off excess) concrete to the proper profile.
The contractor uses a ten-foot straight edge to check for high or low spots in the deck concrete. The contractor uses a float to provide a "sealed" surface finish to the deck concrete.
A tine rake is used to provide surface roughness for bonding of the concrete wearing surface. The new concrete surface is covered with two layers of wet burlap -- the top layer has a white poly coating.
Stripping "buggys" used for removing the deck forms following concrete placement. Note the large buggy (on the left) is used to strip between girders, while a smaller buggy (right) is used to strip the overhang area. A closer view of the large deck stripping buggy.
Differential dead load deflection between bridges (eastbound concrete is in place; westbound has steel only). Differential dead load deflection between bridges (both bridge decks now have concrete in place).
Final concrete pour on the deck of the eastbound bridge -- 7/27/02. Looking northeast at form stripping on eastbound bridge. Decking is in place on the westbound bridge.
Looking southwest at form stripping on eastbound bridge. Decking is in place on the westbound bridge. Looking northwest at form stripping on eastbound bridge. Decking is in place on the westbound bridge.
Looking south at form stripping on eastbound bridge. Decking is in place on the westbound bridge. Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02.
Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02.
Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02.
Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02.
Concrete vibrating is a dirty job, but someone has to do it. Iowa Department of Transportation Commissioners visited the site on 8/5/02.
Iowa Department of Transportation Commissioners visited the site on 8/5/02.
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