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Cortec discusses its High Performance Repair System

Published by
World Cement,

Cortec’s High Performance Repair System (HPRS) makes it possible to reduce the corrosion rate of a concrete structure and extend its useful service life. The system is highly durable, multifunctional and has compatible protection systems to maximise the concentration of Migrating Corrosion Inhibitor (MCI) molecules for the most effective repairs.

HPRS® utilises a special sequence to maximise the performance of MCI in concrete repairs. The process starts with base surface preparation to remove all spalled, loose, and deteriorated concrete. Rust on exposed rebar is eliminated with VpCI®-426 rust remover or treated with CorrVerter® Rust Primer. Two coats of anti-corrosion MCI® grout are recommended on any exposed rebar or metal, followed by the application of various MCI® repair mortars to the concrete structure. Once the repair mortar is cured, MCI®-2020’s powerful formula is sprayed, brushed, or rolled on in order for MCIs to penetrate through concrete and attach to and protect the surface of embedded reinforcing steel. After sufficient absorption, other materials such as coatings or water repellants may be applied on top.

An example of the HPRS system being used successfully is highlighted in Cortec’s case history 496 on the restoration and protection of concrete pipelines in Spain. The customer, C.A.T. had a network of prefabricated reinforced pipes that were at least 30 years old and were experiencing corrosion problems. After removal of damaged concrete and rust, Quimilock passivating grout containing MCI®-2006 NS was applied to exposed rebar. Quimilock repair mortar with MCI®-2006 NS was used next, followed by MCI®-2020 application on the entire surface. Test results showed decreased corrosion rates, and the customer was very pleased with the results of Cortec’s innovative MCI® products.

Adapted from press release by

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