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Publication Number: FHWA-RD-01-164 Date: March 2002 |
Figure I-12: Graphic. Distress map symbols for jointed concrete pavements (adapted from SHRP 1993). This figure shows 14 JCP distress map symbols used to indicate various types of distress and their level of severity when sketching pictures of pavement. On a sketch, the symbol would be drawn and the distress type number and its level of severity would be indicated if appropriate. Severity is expressed with the letters L, M, or H, corresponding to low, moderate or high levels of severity. The table below contains the distress number, its name, a description of the symbol, a column to note when the distress severity level should be indicated with the distress number, and a column to note other indications that go with the distress number. (Note that the numbers do not follow numerical order.)
Distress Number |
Distress Name |
Symbol Description |
Severity Indication |
Other Indications |
---|---|---|---|---|
1 |
Corner breaks |
Arc drawn in corner |
L, M, H |
Number each of the corner breaks |
3 |
Longitudinal cracking |
Vertical line at crack site |
L, M, H |
Length of crack in meters; write the letter S on the map at the distress site if the crack is sealed |
4 |
Transverse cracking |
Horizontal line at crack site |
L, M, H |
Number of cracks and length in meters |
5a |
Joint seal damage of transverse joints |
Shaded box around the horizontal joint where damage is occurring |
L, M, H |
Number of areas of damage |
5b |
Joint seal damage of the longitudinal joints |
Shaded box around the vertical joint where damage is occurring |
No severity levels |
Number of areas of damage |
6 |
Spalling of longitudinal joints |
Series of small, vertical circles around the joint |
L, M, H |
Length in meters |
7 |
Spalling of transverse joints |
Series of small, horizontal circles around the joint |
L, M, H |
No. of joints and length in meters |
8a |
Map cracking |
Rounded plaid/ fishnet pattern |
No severity levels |
Square meters of distress |
8b |
Scaling |
Rounded plaid/ fishnet pattern |
No severity levels |
Square meters of distress |
9 |
Polished aggregate |
Small diagonal lines |
No severity levels |
Square meters of distress |
10 |
Popouts |
Small ovals drawn at an angle |
No severity levels |
Number |
11 |
Blowups |
Curved line over joints |
No severity levels |
Number |
12 |
Faulting of transverse joints and cracks |
Straight line |
No severity levels |
Length of faulting in millimeters |
15 |
Patch/patch deterioration |
Shaded square over patched area |
L, M, H |
Square meters and number of patch; indicate on map an F if flexible or an R if rigid |
16 |
Water bleeding and pumping |
Arrowhead pattern drawn on the crack |
No severity levels |
Number of occurrences; length of affected pavement in meters |