Sikacrete®-530

Shelf life when stored in dry warehouse conditions between 40°F and 95°F (5-35°C) is one year from the date of manufacture.

Sikacrete®-530 must be stored in a dry environment. If exposed or unprotected Sikacrete®-530 will absorb moisture resulting in an unusable product. Physical properties may be adversely affected if stored in temperatures below 40°F (5°C) and material should be allowed to warm to ambient underground temperatures before use.

BOILED ABSORPTION 

5%

MAXIMUM VOLUME OF PERMABLE VOIDS

14%

Approx. 0.5 yd³ per 1,700 lb bulk bag (0.38 m³ per 771 kg bulk bag)

Approx. 1.0 yd³ per 3,400 lb bulk bag (0.76 m³ per 1,542 kg bulk bag)

• Apply in accordance with the ACI 506 - Guide to Shotcrete.
• Performance of in-place shotcrete relies heavily upon application techniques. The shotcrete material, equipment, and key personnel should be pre-qualified prior to project start-up to ensure optimum quality of in-place shotcrete.

OPTIMUM PERFORMANCE

• Product should not be applied when ambient, substrate, and material temperatures are below 40°F (5°C) or above 95°F (35°C).
• For adverse temperatures follow ACI recommendations for Cold/Hot Weather Concreting.
• When using Sikacrete®-530 PF or Sikacrete®-530 ST the minimum recommended inside diameter of shotcrete hoses is 2 inches (50 mm).

Contact your Sika STM Technical Representative for more information.

• Repair or rehabilitation: All surfaces to be in contact with Sikacrete®-530 and its variations must be free from dust, oil, grease or any other foreign substances that may interfere with the bond of the material. Remove all loose or delaminated concrete providing a roughened surface and a minimum of 1 inch (25 mm) clearance behind any corroded reinforcing steel. The perimeter of the repair area should be saw-cut a minimum of ¾ inch (20 mm). Clean the area to be repaired with potable water, leaving the concrete saturated but free of standing water (SSD).
• Rock surfaces: All surfaces to be in contact with Sikacrete®-530 must be free from dust, oil, grease or any other foreign substances that may interfere with the bond of the material. Remove all loose or delaminated rock. Clean the area with potable water, leaving the substrate saturated but free of standing water (SSD).

• Place 75% of required water into mixer and slowly introduce entire bag of Sikacrete®-530 while the mixer is running.
• Allow Sikacrete®-530 to mix for a minimum of five minutes.
• Slowly add balance of required water until desired slump has been obtained, not exceeding maximum recommended volume of water.
• Continue mixing and stop only after material has reached a consistent, homogeneous mix.

Contact your Sika STM Technical Representative for more information.

• Curing is essential to optimize physical properties of the shotcrete and minimize plastic shrinkage. Product should be cured immediately after material has reached initial set in accordance with ACI 308 - Guide to External Curing Concrete. Continuously moist cure for a minimum period of seven (7) days. Alternatively, moist cure for a minimum period of 24 hours and apply a curing compound that complies with ASTM C309. Curing is particularly critical in rapid moisture loss conditions such as high temperatures, high winds and low humidity.
• Underground Environments: Good curing conditions are beneficial to optimizing physical properties. Although the high relative humidity commonly found in underground environments provides for good curing conditions, additional curing is often appropriate and should be performed in accordance with ACI 308 - Guide to External Curing Concrete.

Clean all tools and equipment after use with water. Once hardened, the product can only be removed mechanically.