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Many metal pipes and culverts on Department of Defense (DoD) installations are deteriorating due to corrosion. Repair often requires excavation, including roadways above culverts—a costly, messy, and disruptive approach. This project successfully demonstrated and validated a geopolymer liner system at Fort Bragg, NC. The evaluation focused on strength, corrosion resistance, and implementation to ultimately recommend use of geopolymer liners for DoD stormwater and wastewater infrastructure. A new Unified Facilities Guide Specifications (UFGS), UFGS 33 01 30.71 Rehabilitation of Sewer Utilities, was created to guide adoption of this technology, and a draft criteria reference request was created for UFGS 33 40 00 Storm Drainage Utilities. Caution is advised, however, for using a geopolymer liner in extremely acidic environments. Testing showed that geopolymer material provided higher compressive strength than typical concrete. Acid resistance could not be verified, however, although the product still may be suitable in wastewater environments. The primary advantage of a geopolymer liner is its ability to create a new structural pipe within the old, deteriorating pipe—a no-dig approach that saves costs. The geopolymer liner also provides other benefits such as no cold joints, faster cure time, and less down time. The project’s return on investment is 7.73 over 30 years. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. ERDC/CERL TR-17-27 iii

Geopolymer nanoceramic mortar liner system for corrosion protection and rehabilitation of stormwater piping : final report on Project F14-AR05