City of Tampa, Wastewater Department – Tampa, FL, USA
Pipe lining, concrete repair and rebuild – hand-laid sectional and structural epoxy pipe liner at the 90 degree bend.
Howard F. Curren Advanced Wastewater Treatment Facility
Epoxytec Certified Contractor: Vac-Vision Environmental, LLC.
Certified contractor, Vac-Vision Environmental paired with Epoxytec to assist in a pipe lining project for Insituform Technologies® and the City of Tampa at their Howard F. Curren Advanced Wastewater Treatment Facility. The main influent pipes, 72 inches in diameter, have the capacity to bring in 96 million gallons of wastewater per day. With this kind of high erosive flow and chemical corrosive attack of the concrete, there is no doubt a high performance liner would be needed in order to rehab, improve, and protect the structure in this environment.
A number of considerations go into a product recommendation for this kind of project. For one, the scope needed to be understood in its entirety considering that Insituform needed to approve the Epoxytec solution as a tie to their in situ sewer-grade CIPP (cured in-place pipe). At the 90 degree bend in the pipe, the Epoxytec material had to be proven to bond unquestionably well to the CIPP liner that was planned to be inserted. In addition, the material needed to be structural, and intended as an in situ sectional liner to monolithically compliment the entire CIPP liner.
Therefore, accessibility, ease-of-application, bond strength, structural/modulus properties, the “tie-in” factor, and the environmental and anti-corrosive protective attributes are just a few examples of some of the evaluating data reviewed. Epoxytec suggested the use of Epoxytec CPP and Epoxytec Uroflex. Both are 2-component, 100 % solids epoxy with no VOC’s (Volatile Organic Compounds) that are ideal for confined space and hard to reach areas, such as this application.
With easy-to-use and uncomplicated logistical application methods – the material and tools were simply lowered into the opening approximately 30 feet below the surface and then carried almost 300 feet down the pipe where most of the work actually took place.
The straight sections of the pipe lining was completed by Insituform Technologies® using their proven CIPP liner; to faciliate a monolithic system at the 90 degree bends of the pipe, Insituform consulted with Epoxytec for a sectional complimenting lining system.
The solution that would “tie-in” to the CIPP liner was Epoxytec CPP. The CPP epoxy is the perfect solution because its adhesion is remarkable, especially to concrete and other materials with little preparation and it has a structural compressive strength of 16,000 psi.