TM 5-826-6/AFR 93-5
Figure A-5. Medium severity alligator cracking, case 2.
(c) High severity level (H). Network or pattern cracking has progressed so that the pieces are well
defined and spalled at the edges; some of the pieces rock under traffic (fig. A-6).
Figure A-6. High severity alligator cracking.
(3) Measuring procedure. Alligator cracking is measured in square feet of surface area. The major difficulty in
measuring this type of distress is that frequently two or three levels of severity exist within one distressed area. If each
level can be easily distinguished, they should be measured and recorded separately. However, if the different levels of
severity cannot be easily divided, the entire area should be rated at the highest severity level present.
b. Bleeding, distress 42.
(1) Description. Bleeding is a film of bituminous material on the pavement surface that creates a shiny,
glasslike, reflecting surface that usually becomes quite sticky. Bleeding is caused by excessive amounts of asphaltic
cement or tars in the mix and/or low air void content. It occurs when asphalt fills the voids of the mix during hot weather
and then expands out onto the surface of the pavement. Since the bleeding process is not reversible during cold weather,
asphalt or tar will accumulate on the surface.
A-7
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