PROBLEM
POSSIBLE CAUSE
REMEDY
Mat texture not uniform
See Causes “1, 2, 4, 7-9, 12”
Screed marks
See Cause “3”.
Screed not responding
See Causes “2-4”.
to correction.
Poor pre-compaction.
See Cause “2”.
13. Screed riding on Lift Cylinder.
Lower Cylinder completely.
Poor longitudinal joint.
14. Improper joint overlap.
Overlap 2” maximum.
Poor transverse joint.
See Causes “3, 13”
15. Incorrect nulling of Screed.
Increase “pitch” of Screed before
starting.
PAVER RELATED MAT PROBLEMS (Cont.)
PROBLEM
POSSIBLE CAUSE
REMEDY
Wavy surface
1. Improper base preparation.
Review base installation.
(short waves - ripples)
2. Improper rolling operation.
Decrease speed.
3. Improper mix design (aggregate).
See Asphalt Paving Manual.
4. Improper mix design (asphalt)
See Asphalt Paving Manual.
5. Mix segregation.
Asphalt plant mixing too long.
6. Variation of mix temperature.
Asphalt plant burners not heating
consistantly.
Wavy surface
See Causes “1, 5, 6”
(long waves)
7. Trucks bumping finisher.
Stop truck short of Paver and drive
Paver to truck.
8. Truck holding brakes.
Driver must apply only enough so that
truck stays “in Paver”.
9. Reversing or turning too fast
Cycle must be slow but deliberate.
of rollers
10. Parking roller on hot mat.
Move to cooler surface before parking.
Park at 45
o
angle.
MATERIAL-DELIVERY-COMPACTION RELATED MAT PROBLEMS
907389/AP297
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