UFC 3-270-03
15 March 2001
CHAPTER 12
PARTIAL-DEPTH SPALL REPAIR
12.1. Description. The recommended method for partial depth spall repair is the saw and patch
method. The joint or crack sealant adjacent to the spall area must be removed. A boundary
surrounding the spalled area is sawed using a concrete saw. For Army and Air Force pavements,
the minimum length and width of the rectangular sawcut boundary around a joint spall is 6 inches
(150 millimeters), and for corner spalls, the rectangular sawcut boundaries should be no less than
6 inches (150 millimeters) from the joint corner. The minimum depth of the sawcut boundaries is
2 inches (50 millimeters). For Navy pavements, the minimum length and width of the rectangular
sawcut boundary around a joint spall is 12 inches (300 millimeters). For corner spalls, the
sawcuts should be no less than 12 inches (300 millimeters) from the joint corner and extend a
minimum of 4 inches (100 millimeters) perpendicular to the joint. A third cut is then made
between the two 4-inch (100-millimeter) cuts to form a pentagon with the joint corners and
sawcuts comprising the five sides. The minimum depth the sawcut boundaries is 2 inches
(50 millimeters). A light jackhammer (less than 30 pounds (14 kilograms)) equipped with a
chipping hammer, scarifier, or high-pressure water blaster is then used to remove the concrete
within the boundary to a depth of at least 2 inches (50 millimeters), or to 1/2 inch (12 millimeters)
below the surface of visually sound concrete, whichever is deeper. If a dowel is exposed during
the concrete removal, it must be replaced. Procedures for dowel replacement will not be covered
here but may be found in References 1.3.1., 1.3.6., and 1.3.9. If more than 90 degrees of the
perimeter of reinforcement is exposed, a space must be exposed completely around the bar or
wire and at least 1/2 inch (12 millimeters) below it. A joint filler is used to maintain the existing
joint or crack. Under no circumstances should the spall repair bridge the joint. If PCC is to be
used in the spall repair, a bonding agent must be used to ensure a good bond between the old
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