Vetorep CR520

Cut back all damaged & weak concrete until you reach a sound surface. You can also cut back a minimum depth of 10 mm. 

Grit blast corroded steel reinforcement to remove all rust traces. In case of significant loss in the steel reinforcement cross-section, replace the steel entirely. 

Remove all concrete forms around the exposed steel reinforcements by a thickness of 25 mm. Saw cut the perimeters of the repair area to a minimum depth of 10 mm. Clean the prepared area thoroughly using a brush and/or compressed air. 

To accept Vetorep CR520, prime all grit blasted steel reinforcements within 2 to 4 hours (You can do this by applying one or two coats of Vetoprime CP436, a corrosion inhibitor for steel reinforcement).

Soak the soon-to-be-repaired areas with Vetorep CR520 & clean water before applying the repair mortar.

Remove all excess water before applying one coat of an acrylic bonding agent (Vetobond AB432 for example). Allow Vetobond AB432 to become tacky before applying the repair mortar.

To ensure proper mixing, use a mechanical power mixer or drill fitted with a suitable paddle. Add 3.75 - 4.25 liters of clean water to a clean container. Then add the powder to the water slowly while continuously mixing with a low-speed mixer/drill (400 - 600 rpm). Continue mixing until a uniform consistency is obtained. 

Apply Vetorep CR520 by a trowel or by hand. Apply the mixed mortar by pressing it firmly to fully compact the mortar and ensure good adhesion with the steel reinforcements and the substrate. 

Initially, finish and level the material surface by a wooden or plastic float. Carry out the final finish using a steel float. 

For high thickness applications (both vertically & overhead), it is better to gradually apply it by hand in patches while firmly pressing; this ensures the adhesion with the substrate and the subsequent layers. 

Vetorep CR520 is a cementitious-based material; it cures similarly to concrete (by continuous watering and covering with polyethylene sheets). 

Clean all tools with freshwater immediately after application. Clean hardened materials mechanically. 

Apply Vetorep CR520 in a single application for sections up to 20 mm thick in overhead applications and 75 mm thick in vertical applications. The thickness should not be less than 10 mm deep in all applications.