As used herein, coarse aggregate refers to predominant coarse aggregate size of the asphalt mix, and aggregate clusters refers to when more than one adjoining coarse aggregate piece is missing. If in doubt about a severity level, three representative areas of one square yard each (square meters) should be examined and the number of missing aggregate particles/clusters is counted.
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L – Low severity raveling with slight coarse aggregate loss(< 20 per square yard) is not recorded. |
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M - Considerable loss of coarse aggregate, greater than 20 per square yard (square meter), or clusters of missing coarse aggregate are present (or both). |
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H - Surface is very rough and pitted, may be completely removed in places. |
