The Job
This sand filter joint sealing project is located in Richmond, Virginia. Two underground stormwater sand filters at an apartment community wouldn’t hold water. The structure is four, twenty foot sticks of ten foot diameter CMP. It had to hold water before the property could come off the bond. Previous repairs attempted included the installation of internal joint rings and seals, which did not stop enough flow to pass the water loss tests.
The Challenge
The proposed repair had to accommodate multiple layers of previous repairs. The joints included four different materials–aluminized metal, galvanized metal, neoprene, and polyethylene. The structures are in a bed of washed #57 stone, and subject to live flow.
The Solution
Sprayed high-density polyurethane/polyurea hybrid to seal the joints internally. In addition, chemical grouting for joints with internal bands and polyethylene seals. A fast set reaction kept the chemical from migrating into and fouling the stone bed. The spay application and encapsulates the original repair’s joint seals.
CJGeo’s large diameter pipe repair crew installed chemical grout to seal the leaking joints. Then, each joint was sprayed with a hybrid polyurea-polyurethane internal seal. Immediately after the sealing was performed, the structure held water and passed the water loss test. Neither structure leaked any water after CJGeo sealed the joints.
Speak With An Expert
Facing a similar challenge to this sand filter joint sealing project? Give us a shout or shoot us a text. Click the state marker for the location of your project for contact info for the appropriate rep.
