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Geopolymer Lining of Corroded Reinforced Concrete Sanitary Sewer Pipes

Picture for Geopolymer Lining of Corroded Reinforced Concrete Sanitary Sewer Pipes
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While sewer renewal technologies currently being used for the repair replacement and/or rehabilitation of deteriorating wastewater collection systems are generally effective there is still room for improvement of existing technologies and for the development of new technologies. Many utilities are seeking innovative rehabilitation technologies particularly for large-diameter pipes. However information about these emerging technologies is not always readily available. As part of the U.S. Environmental Protection Agency (USEPA)’s Aging Water Infrastructure Program a field demonstration program of innovative rehabilitation technologies was initiated with the purpose of: (1) gathering reliable performance and cost data for new technologies; and (2) making the capabilities of these technologies better known to the industry. This paper describes the demonstration of an innovative spray-applied fiber-reinforced geopolymer mortar for rehabilitating a 60-in. reinforced concrete pipe approximately 25 ft deep in Houston TX. The demonstration section was 165 ft of severely deteriorated pipe that terminated at a wastewater treatment plant (WWTP). Unique aspects of this project included: (a) the use of an innovative and emerging large-diameter structural rehabilitation technology on a severely deteriorated pipe located beneath a large open stormwater channel; (b) an independent third-party assessment of the technology; and (c) difficult flow control issues at the WWTP.

Product Number: 51319-13177-SG
Author: Joe Royer
Publication Date: 2019
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Accelerating Construction in Sewer Collection: Madison CMIC Pump Station #1 A Case Study
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The County of Madison, MS. experienced severe degradation of a major pump station in their system that was less than 10 years old. They contracted with Waggoner Engineering of Jackson, MS. to design a rehabilitation system as well as increase the structural integrity with the addition of some support walls. The project created scheduling issues due to the addition of new concrete structures to the pump station. The use of innovative coatings technologies that offered the ability to apply corrosion resistant linings over green concrete structures, dramatically enhanced the project schedule and reduced overall costs. 
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