TM 5-623
Table 4-1. General Classification of Asphalt Distress Types by Possible Causes
POSSIBLE CAUSES
Load
Climate/durability
Moisture/drainage
Other factors
Alligator Cracking
Alligator cracking
Corrugation
Corrugation
Block cracking
Depression
Depression
Joint reflection cracking
Potholes
Bumps and sags
Edge cracking
Longitudinal and trans-
Swell
Lane/shoulder drop off
Patching of road-caused caused distress
verse cracking.
Polished aggregate
Patching of climate/dura-
Potholes
bility-swell caused dis-
Rutting
tress.
Slippage cracking
Potholed
Swell
Weathering and raveling
Table 4-2. General Classification of Concrete Distress Types by Possible Causes
POSSIBLE CAUSES
Load
Climate/durability
Moisture/drainage
Other factors
Corner break
Blow-up
Corner break
Faulting
Divided slab
"D" cracking
Divided slab
Lane/shoulder drop off
Linear cracking
Joint seal damage
Patching of moisture-caused
Railroad crossing
Patching of load-associated distress
Linear cracking
distress
Polished aggregate
Patching of climate/dura-
Pumping
Punchout
bility-associated distress
Spalling (joint)
Popouts
Pumping
Scaling
Shrinkage Cracks
Spalling (joint)
Spalling (corner)
(1) Step 1. The total deduct values (TDVs) attributable to load, climate/durability, and other associated
distresses are determined separately. In the example being considered (fig. 4-1) the following distresses and TDVs were
measured on an asphalt section of pavement.
Distress
Distress type
density
Severity
Deduct
Probable cause
over
level
value
section
Alligator cracking ........................
10
M
47
Load
Transverse cracking ...................
3
M
17
Climate/durability
Rutting........................................
5
L
21
Load
Total ................................................................................. 85
The TDV attributable to load is 68; the TDV attributable to climate durability is 17.
4-9
Previous Page
