Bridging the Great Health Divide. Mid-South Heroes. Friday Football Fever. Gas Prices. Bluff City Life. About Us. Meet The Team. Editorial Board. Latest Newscasts. Investigate TV. Gray DC Bureau. Intentional cracks in the sidewalk are a perfect example of how engineers deal with thermal expansion. By filling these gaps with a flexible material, the engineers create what's known as a "expansion joint," something that's meant to help a structure keep its form even with shifting temperatures.
Expansion joints come in all shapes and sizes, from clay bricks to molded rubber. Some forms of construction, like railways or air ducts, have specialized breather joints meant to deal with their unique thermal stresses. Copper is often seen as a good one-size-fits-all solution for an expansion joint, given its durability and ability to take a wide variety of forms.
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In many regions, there are independent organizations that validate the performance characteristics of bridge deck waterproofing systems. Ask manufacturers both for references from long-term bridge projects as well as accelerated age testing data to see how the membranes have performed over the ensuing decades since they were applied.
Growth in population in urban environments is also putting increased pressure on bridges, so protecting structures to ensure a longer service life is more important than ever.
Finding a company with experts on hand to guide you through the specification is a good way to ensure the plans are fool-proof and tailored to the specific project. Steel bridges These bridges are at risk of corrosion through oxidation from exposure to moisture and oxygen.
A cycle of deterioration is triggered once the steel begins to rust and corrode, leading to loss of strength and integrity of the structure. Concrete bridges Moisture and chloride exposure are the main causes of deterioration of concrete bridge decks. Over time, this ingress causes the steel reinforcement to corrode resulting in cracking and spalling of the concrete.
How quickly can the waterproofing membrane be applied? How do I ensure the waterproofing membrane is applied correctly? How easy is it to repair the bridge deck waterproofing membrane? How do you test the performance of your waterproofing system? Can you demonstrate that your bridge deck waterproofing membrane stands up over the years?
Jeanie Clapp.
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