QuakeWrap wins award for pipe rennovation

QuakeWrap used a carbon fiber fabric to rehabilitate a large concrete pipe at a coal-fired power plant in Farmington, N.M.

QuakeWrap Inc. (Tucson, Ariz.) announced on Nov. 10 that it has been awarded the International Concrete Repair Institute (ICRI) 2008 Award of Excellence for its structural strengthening of concrete pipelines using carbon fiber reinforcement polymers at the San Juan Generating Station in Farminton, N.M. The award was given to QuakeWrap founder and University of Arizona civil engineering professor Dr. Mo Ehsani.

Due to corrosion of reinforcement wires, several sections of a 10-ft/3m-diameter prestressed concrete cylinder pipe in the coal-burning plant required strengthening. Design requirements called for additional strength in both hoop and longitudinal directions. Access to the pipe was available only through a 30-inch/762-mm-diameter manhole. This required redesign and manufacturing of the equipment.

A special PipeWrap carbon fiber fabric was developed  for this project  to achieve the strengthening requirements with a single layer of fabric -- instead of two layers as called for in the original design. Samples were constructed and tested to demonstrate the feasibility of the solution. Bands of fabric 50 inches/1,270 mm wide were applied in the hoop direction, with a single overlapping joint along the bottom of the pipe. The entire repaired section was coated with a layer of chemical-resistant coating.