THE JOB
A jack & bore contractor performed a 200LF, 54″ bore under an arterial highway. After sliding in a 48″ RCP carrier pipe (stormwater), the annular space required grouting. This Maryland annular space grouting project is located in Jessup.
THE CHALLENGE
Due to size limitations, only one end of the pipe was accessible for grouting. The length of the placement was approximately 200LF, so grout had to travel 200LF at low pressure while ensuring a complete fill.
THE SOLUTION
CJGeo proposed cellular concrete for the annular space grouting. Cellular concrete is highly flowable. High flowability ensures low installation pressure, reduces flotation of lightweight carrier pipes, and ensures complete void filling outside of the host pipe.
CJGeo successfully performed this Maryland annular space grouting project in a single day using CJFill-Ultra Lightweight cellular concrete. The peak pressure at the pump did not exceed 5PSI throughout the project.
Due to the relatively low volume, CJGeo used continuous wet batch generation for making the cellular concrete. With continuous wet batch generation, a ready mix company delivers the slurry. The ready mix truck discharges into a grout pump, and CJGeo injects the preformed foam continuously in line downstream of the pump.
Speak With An Expert
Facing a similar challenge? Give us a shout or shoot us a text. Click the state marker for the location of the project for contact info for the appropriate rep.
