Calix’s ACTI-Mag SP60 is a concentrated, controlled-viscosity, concentrated, stabilised suspension of magnesium hydroxide (MgO). The product is hydrated from Calix reactive MgO, imparting a good neutralisation capability due to the high surface area.
The MgO spray coating maintains a high pH on the sewer walls, neutralising sulfuric acid and preventing it from reacting with the pipe concrete. The high pH inhibits the growth of specific acid-forming bacteria (eg, Thiobacillus concretus).
The thixotropic properties of the coating allow the suspension to be easily pumped for spraying. The material sets to a gel that adheres to concrete surfaces. The user-friendly application can be carried out without diverting the sewage flows and does not require man entry.
The spray allows for thick coatings to be applied (typically 2 mm in a single pass), with the potential to control the coating strength and thickness through specific additives that derive strength from the high MgO reactivity. Sacrificial MgO coating is said to protect the integrity of concrete sewer walls for 2-3 years.
Phone: 02 8199 7400
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