News & Thought Leadership


Composite Repairs Part 1 | What are the effects of installation pressure on composite repairs?

September 13, 2016
Composite repairs installed at operating pressure will do two things: 1. Protect the pipe from future external damage (corrosion or mechanical). 2. Reinforce hoop stress in the event of pressure spikes or continued wall...

Geopolymers Part 5 | Summarizing the Cincinnati Sewer Repair

September 08, 2016
Typical engineering inputs to systems such as the one in Cincinnati include: Diameter of the pipe Size of the pipe Depth the pipe is buried Location of the water table. What, if any, live loads are applied over the pipes...

Leak Design: How tough is your repair system?

August 30, 2016
Looking specifically into the leak design case, or potential leak design case, a new element is introduced in the standards mentioned in our latest post – mainly the “gamma” value as seen in equations...

A Conclusion: When are Composite Repairs Ideal?

August 29, 2016
Composite repairs can extend the life of a pipe experiencing cracking, but no significant testing has yet determined its effectiveness. Current standards either do not recommend or allow composite repairs on cracks that...

Geopolymers Part 4 | Manning the Sled to Ensure Consistency

August 25, 2016
While the Geospray sprayer is often attached to a sled that can be pulled through a pipe, the application process requires some human oversight. For example, the person manning the sled will watch as the Geospray...

Repair Design: Are you following the right standards?

August 23, 2016
As we mentioned in a previous blog post, it is imperative that the design of the repair is in accordance to current standards and that proper due diligence is performed to ensure all scenarios are accounted for,...

Resin: Pre-Impregnating Fabrics to Ensure Consistency & Simplicity

August 16, 2016
Epoxy systems are typically two-part systems that are mixed, stirred, and hand-applied to the fabric in the field. This technique relies on knowledgeable technicians to ensure an acceptable resin-to-fabric value....

Geopolymers Part 3 | Cincinnati Steep Grades and Sewer Degradation

August 11, 2016
It’s hard to see in these pictures, but one of the biggest challenges of this repair job was its position on a steep (25 percent) grade. In fact, the slope was so severe in some places that the repair team needed...

Fabric Weave: The effect of balanced vs. unbalanced weaves

August 09, 2016
We often receive questions about the ideal pipe repair systems given varying external conditions. Our recommendations are predicated upon the fabric weave that is most appropriate, in addition to other factors. Consider...

Mechanical Damage

August 08, 2016
Localized cracking may become present through mechanical damage (MD) including, but not limited to, gradual or rapid soil movement, severe dents, wrinkle bends and bending. Localized cracking due to MD may be external or...