GeoTree - First Aqueduct Water Pipeline Rehabilitated With GeoSpray Geopolymer For SDCWA

Maintaining the structural integrity of critical water conveyance systems often requires working within tight, pre-defined operational windows. For an aqueduct system serving millions, any rehabilitation effort must be completed during scheduled shutdowns to avoid regional water shortages. When inspections of two 72-inch horseshoe-shaped tunnels revealed groundwater infiltration and surface deterioration, engineers needed a solution that could be deployed rapidly over long distances from limited access points.

The project utilized a high-performance geopolymer mortar specifically certified for drinking water contact. This material was selected for its exceptional flexural strength and its ability to chemically bond across cold joints, ensuring a monolithic structure even when application is interrupted between shifts. Using proprietary centrifugal application devices, the mortar was pumped hundreds of feet to the application site, creating a 1.5-inch structural liner that eliminated infiltration and improved water quality. This trenchless approach not only met the rigorous technical requirements but also proved to be 20 percent more cost-effective than alternative relining technologies. Read the full case study to see how geopolymer solutions optimize the rehabilitation of large-scale water tunnels.