BUSINESS SOLUTIONS
WATERPROOFING A PRECAST CONCRETE RAIL BRIDGE IN LOUISIANA Modified specification highlights areas of the maximum potential weakness
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ast year Canadian National replaced a wooden trestle bridge with a precast concrete bridge in the state of Louisiana. The scope of the waterproofing work was as follows: • Seal longitudinal and transverse rtands.com
joints in the precast concrete panels; • Fill longitudinal joint between panels to avoid collection of moisture and debris; and • Waterproof the bridge deck to meet owner expectations without a completely lined monolithic coating
system. The scope was chosen because the proposed systems offered a very fast return to service and allowed for making up time in the midst of a hurricane season in Louisiana, which was fully expected to impact the project’s schedule. May 2021 // Railway Track & Structures 29
