24 Water main abandonment slide

24″ Water Main Abandonment

Fairfax, Virginia

24 Watermain Abandonment

The Job

This 24″ water main abandonment project is located in Fairfax, Virginia. Fairfax County is part of the rapidly expanding Northern Virginia region. As part of a large transportation project, 2000 linear feet of 24″ water main were being relocated out of a highway right-of-way.

The Challenge

Due to phasing, the old water main was located under the existing roadway and could not be accessed, except for at one point near the center of the run. So, the abandonment grout had to meet VDOT’s minimum strength requirements for flowable fill, and be pumpable up to 1100LF at low pressure. VDOT’s minimum 28 day unconfined compressive strength requirement is 30psi.

The Solution

CJGeo grouted each run of pipe using 30lb/cuft CJFill-Ultra Lightweight low density controlled low strength material. Each CJFill-UL placement took fewer than two hours, and required no additional traffic control, disruptions to other construction activities, or help from the utility contractor after they installed the bulkheads.

The 28 day compressive strength of 30lb/cuft CJFill-Ultra Lightweight cellular grout is 150psi. This significantly exceeds VDOT’s minimum compressive strength for controlled low strength material (flowable fill).

Speak With An Expert

Facing a similar challenge to this 24″ water main abandonment project that CJGeo completed using CJFill-Ultra Lightweight cellular concrete? 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.