February 2022 Vol. 77 No. 2
Rehab Technology
Imerys Celebrates 30 Years of Sewpercoat in North America
Calcium aluminate has been used in sewer environments since the 1940s. Initially, the drivers were resistance to sulfates in soil, rapid return to service and superior abrasion resistance.
Over time, it became clear that Calcium Aluminate Concrete showed improved corrosion durability, even in the harshest sewer environments. Studies were performed to better understand the science behind the improved performance and in the early 1990s SewperCoat, was developed specifically to protect wastewater infrastructure from biogenic corrosion.
The first installation of SewperCoat, in Virginia in December 1991, was for a critical connection chamber at a municipal wastewater treatment plant. This connection chamber was selected because of its extreme corrosive environment. Since its rehabilitation with SewperCoat, inspections have been done every few years over the last 30 years, and the structure has exhibited virtually no signs of corrosion or degradation.
This connection chamber is still in service today, confirming that SewperCoat has offered outstanding field performance against biogenic corrosion for three decades. Today, SewperCoat is the reference solution installed daily throughout the North American wastewater network and around the world across five continents.
SewperCoat is a ready-to-use premix mortar composed of 100-percent calcium aluminate materials. It is specifically designed for spray-applied installation methods to provide a protective lining for structures exposed to abrasion and biogenic corrosion resulting from the hydrogen sulfide (H2S) cycle that occurs in municipal wastewater environments.
SewperCoat is part of the Imerys range of solutions for the construction market. With more than 100 years of expertise, Imerys offers mineral-based solutions for the needs of the construction industry. Its brands for construction include SewperCoat, Fondag, Ciment Fondu and Ibeco.
FOR MORE INFORMATION:
SewperCoat, sewpercoat.com
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