Houston, TX
GeoSpray® Geopolymer: RCP Sanitary Sewer

Project Overview

Like most major cities, Houston has a system of aging pipes and other infrastructure that needs to be repaired. Over the past several years, Houston has installed nearly 10,000 linear feet of GeoSpray AMS to address corroded reinforced concrete pipe (RCP) as part of their sewer infrastructure renewal program.

RCP is generally vulnerable to Microbial-Induced Corrosion (MIC) a process that converts via microbes hydrogen sulfide gas into sulfuric acid. The acid works to corrode the crown of the pipe above the waterline.

One such section of pipe, approximately 165 linear feet in length and 60
inches in diameter, terminates at the Northwest Wastewater Treatment Plant (WWTP) and runs 25 feet directly below the White Oak Bayou. The pipe was in extremely poor condition with exposed rebar for most of the length and several locations with gushing water infiltration.

This specific project was also jointly observed by the U.S. Environmental Protection Agency (EPA) and Battelle Memorial Institute of Columbus, Ohio, under Task Order 01 of Contract No. EP-C-11-038 as part of the EPA’s Aging Water Infrastructure Research Program.

Read the full case study here.

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