UFC 3-270-03
15 March 2001
manufacturer's recommendations must be followed closely. The entire surface of the repair area
must be lightly coated or sprayed with the bonding agent, and the repair material must be placed
through small openings where the joint filler meets the bottom of the spall recess, a small bead of
caulk may be placed to prevent the dripping.
16.4. Mixing and Placing. The mixing and placing of spall repair materials often varies
considerably due to the widely different materials that can be used. It is good practice to place
the repair material at pavement temperatures above 55 degrees Fahrenheit (13 degrees Celsius)
and below 90 degrees Fahrenheit (32 degrees Celsius). If water is required, the correct amount
of clean, fresh water must be added and thoroughly mixed. Hand mixing almost always requires
more time than drum or mortar mixers. When hand mixing, there is also a tendency to add more
water than required to ease the mixing effort. Manufacturer's recommendations for mixing and
curing of materials must always be strictly followed to ensure a quality patching job. For more
details on placing concrete in hot and cold weather, refer to ACI 305R and ACI 306R (Table 1.2.).
Repair materials must not be placed at temperatures less than 40 degrees Fahrenheit (4 degrees
Celsius) and only with special insulation and longer cure times for temperatures less than 55
degrees Fahrenheit (13 degrees Celsius). In summer, it is best to place repair materials in the
morning when pavement temperatures are lower. In winter, afternoons are best.
16.5. Consolidation. After placement, the repair material must be throughly consolidated to
remove trapped air. Cementitious and polymer concrete materials require some type of
consolidation, by tamping or, if suitable, supplemented by vibration (Figure 16.2.). Vibrators with
a small (less than 1 inch or 25 millimeters) head or vibratory screeds are recommended for small
repairs. Grate tampers must not be used. After consolidation, the repair material must be
finished to match that of the surrounding pavement (Figure 16.3.). A completed patch is shown in
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