UFC 3-270-06
15 March 2001
CHAPTER 14
DISTRESS 52, RAVELING AND WEATHERING
14.1. Description. Raveling and weathering are the wearing away of the pavement surface
caused by the dislodging of aggregate particles and loss of asphalt or tar binder. They may
indicate that the asphalt binder has hardened significantly. Deduct curves for raveling and
weathering are shown in Figure 14.1.
14.2. Severity Levels.
14.2.1. L. Aggregate or binder has started to wear away, causing little or no FOD potential
(Figures 14.2. and 14.3.).
14.2.2. M. Aggregate and/or binder has worn away, causing some FOD potential. The surface
texture is moderately rough and pitted (Figure 14.4.).
14.2.3. H. Aggregate and/or binder has worn away, causing a high FOD potential. The surface
texture is severely rough and pitted (Figure 14.5.).
with no distress).
14.3.1. L. In a square-foot (square-meter) representative sample, the number of aggregate
pieces missing is between 5 and 20 and/or the number of missing aggregate clusters (when more
than one adjoining aggregate piece is missing) does not exceed 1 (Figure 14.7.).
14.3.2. M. In a square-foot (square-meter) representative sample, the number of aggregate
pieces missing is between 21 and 40 and/or the number of missing aggregate clusters is greater
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