Posts in the ‘Polyurethanes’ Category

Leaks sealed in tieback anchor system

When one is excavating a pit 80-feet deep and several acres in area, it is necessary to create a temporary perimeter wall of concrete caissons. A post-tensioned cable tieback anchor system then holds these in place. If water is gushing out of the cable sleeves, however, it becomes impossible to weld the anchor plates to the walers. That is exactly the ...

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Filling voids under giant fiberglass tanks

Paul Wright of Python Corporation needed a solution for a client. The client is a fiberglass company with 28 enormous fiberglass tanks for material storage that had irregularly shaped bottoms. This resulted in voids under the tanks. Wright recommended using structural polyurethane foam to ensure full bearing coverage. He turned to Prime Resins to develop a lifting and void filling foam ...

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Sinkhole repair saves money, disruption

A leaking sewer line and storm water main drain caused a sinkhole in a high traffic area at the busy Port of Palm Beach. A traditional excavation to repair the pipes, fill the voids and replace the asphalt was an expensive and highly disruptive option that port officials hoped to avoid. Seawall Doctors of Boca Raton, Fla., seal the leaks, ...

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Polyurethanes in hot weather

4 Tips for Injecting Polyurethane Grouts in Hot Weather We often get asked about how polyurethane resins will react in cold weather or in the presence of cold water. In that case, both typically slow reaction times. Less common are questions about chemical grouting in hot weather. There are, in fact, some things you should keep in mind when temperatures are soaring ...

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Lifting foam complements piers

Using Lifting Foam With Piers Polyurethane structural lifting foams can be the perfect complement to helical or push piers for foundation or structural raising and stabilization. The foams can be strong enough to do the lifting themselves in many cases, but if piers are required for structural reinforcement, polyurethane foam is the perfect choice to fill the voids created by lifting ...

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Stopping a persistent leak at last

The Niagara Parks Commission has spent a lot of money over many years attempting to seal persistent leaks in a pedestrian tunnel to the Niagara Falls Voyage to the Falls boat dock. Cracks were injected and repainted just about annually for years, but still the leaks persisted. It appears that a combination of wrong material and improper installation doomed past ...

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Undersealing an LNG pit in Texas…at 124 degrees

When the Sabine Pass (Texas) liquid natural gas facility was built, the concrete contractor needed to stop leaks in an emergency maintenance pit so a special overlay material could be installed on the floor. The concrete floor is 4 feet thick and sits on top of a 6-foot mud mat. The facility sits adjacent to a shipping channel, so the groundwater ...

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Hydrophilic vs Hydrophobic

Hydrophilic vs Hydrophobic: Which to Use and Why Chemical grouts are a cost-effective solution for many leak sealing, void filling and soil stabilization projects. Choosing the right material and installing it correctly are critical to the long-term success. Chemical grouts fall into two classes: hydrophilic grouts that have an affinity for water and seek it out and hydrophobic grouts that repel water and ...

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Permeation grouting, void filling and lifting at a wastewater treatment plant

The Quakers Hill Wastewater Treatment Plant in Sydney, Australia, has a pump pit that houses several pumps that transfer water from the digesters to other tanks. The pit is sloped and has a sump pump so that rainwater doesn't collect in the pit. The other corner at the same end of the pit as the sump had settled, however, causing ...

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Field Notes: Niagara Falls, Ontario

Passengers going on the Hornblower Cruise at Niagara Falls (formerly Maid of the Mist), expect to get wet. What they don’t expect is that they will get wet walking through the pedway to the boats. Several leaks in the tunnel ceiling are in the midst of being sealed this week with injection of Prime Flex 900 XLV, our super ...

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