UFC 3-270-01
15 March 2001
2.3. Repair Options. There are usually several different options for repairing a distress. The
"true cause" of a distress should be analyzed and then a repair method should be selected to
best resolve the distress cause. The M&R procedures in Paragraph 2.2. are presented in the
following chapters with logical and sequential steps to accomplish the tasks.
2.4. Importance of Weather. The following guidance should be followed to successfully repair
asphalt pavement during appropriate weather conditions.
2.4.1. Preferably, patching or resurfacing work should be performed during warm, 50 degrees
Fahrenheit (10 degrees Celsius) and above, and dry weather. When hot or warm asphalt
mixtures are placed on cold pavements, they may cool quickly and cause adequate compaction
to be difficult. Moreover, asphalt and asphalt mixtures usually do not bond well to damp surfaces.
2.4.2. Mixtures containing emulsified or cutback asphalt are slow curing when the humidity is
high. Low temperatures also slow evaporation during curing.
2.4.3. Seal coats and other surface treatments can be affected by moisture during the first few
hours after placement. Rainfall prior to the time the liquid asphalt solidifies can result in the
leaching away or segregation of the asphalt from the aggregate. This could result in the loss of
some or all of the applied surface treatment.
2.4.4. This does not mean that repairs cannot be performed during cold or damp weather.
Rather, they require much greater care when made during such weather conditions, and the
repairs are much less likely to be satisfactory. It is better, however, when the safety and comfort
of the traveling public are concerned, to make the repairs even though they may be only
temporary. Also, a delay in repairs may allow small surface defects to progress into major
failures.
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