CARE Program

Public officials are looking to wisely invest the funds allocated for water main rehabilitation. This may become tricky for the buried and invisible potable water infrastructure, the cornerstone of our social and economic development.

Clearly, breaking water mains can be addressed through replacement and / or structural rehabilitation. However, Utility managers also know that a large percentage of water mains need upgrading because of internal corrosion, affecting water quality, pressure and flow.

One area of savings (and peace of mind) is to cleverly apply the proper level of rehabilitation based on the true structural condition of the water main, which is mostly dependent on soil type, water characteristics, material composition, age and leakage history.

This is when the structural assessment of the water mains becomes interesting before deciding on using the method of rehabilitation. Thanks to the Electromagnetic (Eddy Current) Probe, it is now possible to measure the water mains’ wall thickness losses, providing guidance and assurance as to the level of rehabilitation required from non, to semi to fully structural.

How it Works

Immediately after cleaning, we can insert the probe along the entire length of the water main and thus review and assess the water main’s TRUE structural condition. For example, a wall thickness loss of less than 20% for a 60-year old water main may require a semi-structural rehabilitation. Wall thickness losses of 10% or less may require a non-structural rehabilitation. High wall thickness losses will obviously require structural rehabilitation. Those decisions are taken prior to project start (see graphic below).

For those reasons, we have developed the CARE program (Clean- Assess-REhabilitate), to assess the structural condition of the water main on-site, allowing intelligent rehabilitation decisions.

In the field, Acuro can apply the proper lining thickness required (each spray-pass is 1mm thick) based on the TRUE water main’s rehabilitation needs, thus providing the desired level of structural reinforcement. Basically, the less number of passes, the less costly to the Utility.

The CARE work steps

Can be executed in one or two days, are summarized as followed:

  • Clean and dry the water main
  • Assess, on-site, the wall thickness loss using the Electromagnetic (Eddy Current) Probe
  • REhabilitate water main by spraying the desired thickness of Polymeric Resin, providing a structural rehabilitation as per ASTM-1216.

Rehabilitation Strategy for Potable Water Mains

Problems
  • Leaks, Breaks
  • Color, Odor
  • Flow, Pressure
Clean
Assess
  • Partially Deteriorated
  • Fully Deteriorated
Rehabilitate

CARE Steps

  • Clean
  • Assess
  • Rehabilitate