How to Apply
Surface Preparation (See ICRI guidelines)
- Remove loose and deteriorated concrete by mechanical chipping or sandblasting to obtain a fractured aggregate surface.
- Detail the edge of the patch to a 90° angle and ¼” deep to eliminate feathering edge.
- Make sure surfaces are sound, clean and free of all bond-inhibiting materials including oil, dirt, dust and laitance and standing water.
Use FasTrac V/O Mortar at a preconditioned temperature of 71 ± 5° F (22 ± 3° C). Use 6.0 to 6.5pts (2.83 to 3.08 L) of water per 50lb (23kg) bag. Mixing must be achieved mechanically using a slow-speed, ¾ inch (19mm) drill and mixing paddle. Pour 6.0pts (2.83L) of water into a clean 5 gallon (19L) mixing bucket.
Mix while slowly adding the powder, one-third at a time. if more water is needed, up to one-half pint (0.24L) may be added. Mix up to 4 minutes to a uniform lump-free consistency. Avoid over mixing which could entrap air.
Working time – 25-55 minutes
Set time – ASTM C266
Compressive Strength ASTM C 39
1day………….2,800 psi (19.3 MPa)
7days………..5,500 psi (37.9 MPa)
28days………6,500 psi (44.8 MPa)
Apply only to sound and clean properly prepared frost-free surfaces. Dampen the area to be repaired so that the pores of the concrete are filled with water. Remove any ponding or glistening water on the surface (saturated surface dry/SSD). IMPORTANT: Work a scrub coat of the mixed material into the substrate to ensure intimate contact and establish bond. Complete the repair while the scrub coat is still wet and trowel to the desired finish. The Overhead Mortar with CI can be applied to a thickness of 2 inches (51mm) in one lift. For application depths greater than 2 inches (51mm) apply FasTrac V/O Mortar in successive lifts. For additional lifts, scarify the first lift and allow it to set until hardened sufficiently to accept the next lift, about 30 minutes at 73° F (23°C). Trowel the final lift to the desired finish. Applications made during temperatures below 50°F (10°C) or above 85°F (29°C) should follow appropriate application guidelines.
Direct sun or wind may cause unwanted rapid surface drying. Curing may be accomplished by continuous water fogging for 48 hours or cover with damp burlap or burlene curing blankets. Do not use solvent-based curing compounds. If a coating or sealer will be applied use water fogging or blanket curing methods and prep finished surface per manufacturer’s recommendations.