Repair, Evaluation, Maintenance, and Rehabilitation Research Program. Comparison of Cast-in-Place Concrete Stay-in-Place Forming Systems for Lock Wall Rehabilitation
BERGMANN (DONALD J) AND ASSOCIATES ROCHESTER NY
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Prior to 1988, the general approach to lock wall rehabilitation was to remove 1 to 3 ft of concrete from the face of the lock wall and replace it with new air-entrained concrete. One of the most persistent problems using this approach was cracking in the replacement concrete. Since that time, a new rehabilitation method using precast concrete as a stay-in-place form for the replacement concrete has been developed. This rehabilitation method was used initially at Lock 22 on the Mississippi River and more recently at Troy Lock on the Hudson River. This report is a product of the after-action study performed on the use of precast concrete stay-in-place forming system for lock chamber rehabilitation at Troy Lock and comparison with previous cast-in-place repairs. Listed herein is pertinent background information, design criteria, panel details, production data, installation details, and quality and economic comparisons with cast-in-place rehabilitation. A separate documentary video of precast concrete panel product and installation was also produced as part of the after-action study. The precast system used at Troy Lock was installed at a cost slightly lower than that of cast-in-place systems used previously, but with substantial improvements in appearance, durability, speed of construction, and extent of cracking.
- Civil Engineering
- Construction Equipment, Materials and Supplies