Simmons Army Airfield: Ft. Bragg, N.C.
GeoSpray®: CMP lining


As part of a demonstration and research project sponsored by the US Army Engineer Research and Development Center located in Champaign, IL the US Army Corp of Engineers (USACE), in conjunction with Fort Bragg’s Directorate of Public Works, completed the rehabilitation of a CMP culvert at the Simmons Army Airfield.
The research and development center was looking to validate newer large diameter pipe rehabilitation solutions and chose Milliken’s GeoSpray geopolymer mortar as a product they were interested in evaluating for their infrastructure needs.

Rehabilitation Solution

Inland Pipe Rehab was selected as the contractor for the project. The design thickness specified by USACE was 2” of GeoSpray geopolymer mortar as the repair lining. The application was performed with temperatures in the 40 °F range, and was applied in 3 different application passes.


The demonstration project was funded by the Office of the Secretary of Defense Corrosion Prevention and Control Program. The USACE determined that “this process of culvert relining with geopolymer mortar can be an effective alternative to other trenchless technologies, especially true when the pipe diameter is 54 inches or larger.”
The project engineers further recommended the system in a subsequent Public Works Digest article that stated, “This is a process that should be seriously considered by all Army organization when planning to repair or rehabilitate deteriorated storm culverts, and storm or sanitary pipes. In particular, this is a very useful process to use when structures are located beneath roadways, since digging up the road is avoided.”

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