Duro-Crete®

Mix and substrate temperatures should be maintained between +5 °C (40 °F) and +30 °C (86 °F). For temperatures below 5 °C (40 °F) refer to Duro-Crete CT. In warm weather, ice water may be used as mix water to cool mix temperature and avoid short working times. When ambient temperature is above 30 °C (86 °F), refer to ACI 305, “Guide to Hot Weather Concreting.”

Yes, Duro-Crete is conceived for galvanic anode applications including new construction and rehabilitation.

Place material uniformly and consolidate by forcing against the edge of the repair area and continue placing material toward the centre.

Maximum recommended volume of water is 3.2 L (0.85 US gallon) per 25 KG (55 lb) bag.
Place 75% of required potable water into the mixer and slowly introduce entire bag of Duro-Crete. Add balance of required water slowly while mixer is running, not exceeding maximum recommended volume of water. Continue mixing until material has obtained a consistent homogeneous mix to a maximum of 1 minute.

Place Duro-Crete at a minimum thickness of 6 mm (¼ in) and a maximum thickness of 38 mm (1½ in).

All surfaces to be in contact with Duro-Crete must be free from dust, oil, grease, or any other foreign substances that may interfere with the bond of the material. Remove all delaminated or unsound concrete providing a roughened surface. The perimeter of the repair area should be saw-cut a minimum of 6 mm (¼ in). Clean the area to be repaired with potable water, leaving the concrete saturated but free of standing water (SSD). For maximum bond strength, use SAKRETE Concrete Adhesive. Place Duro-Crete at a minimum thickness of 6 mm (¼ in) and a maximum thickness of 38 mm (1½ in).

Curing is essential to optimize the physical properties of Duro-Crete and minimize plastic shrinkage. Duro-Crete should be cured immediately after material has reached initial set, in accordance with ACI 308 “Guide to Curing Concrete.” Continuously moist cure for a minimum period of 7 days. Alternatively, moist cure for a minimum period of 24 hours and apply a curing compound that complies with ASTM C 309. Curing is particularly critical in rapid moisture loss conditions such as high temperatures, high winds, and low humidity.

For repair applications exceeding 38 mm (1,5 in) use FA-S6, FA-S10, MS-S6, MS-S10, MS-S6 SCC, MS-S10 SCC or RS-S10 SCC, depending on the application.

A 25 kg (55 lb) bag contains approximately 0.012 m3 (0.42 ft3).