
3-14
ASPHALT SURFACE PREPARATION
It is possible, but usually not necessary, to take direct transmission
readings on asphalt. Drilling a hole in asphalt can be difficult, and
may require the use of a drill (rather than the drill rod) if the asphalt
has cooled and hardened.
Under normal conditions, a backscatter reading provides an accurate
measurement of asphalt density.
✓
Find a smooth, level location on the asphalt. The operator may
want to fill the voids on open mixes with sand or cement. Take
care to leave the asphalt exposed.
The gauge base must rest on
the asphalt, not the fill material!
✓
Ensure that the gauge does not “rock.” It must remain steady. If
rocking occurs, find a more suitable test site. If taking a
measurement around a core, the gauge may be moved a few
inches away from the hole to level the gauge.
Содержание 3430-M
Страница 9: ......
Страница 14: ...xii NOTES...
Страница 19: ...Model 3430 1 5 Figure 1 1 Model 3430 Gauge and Accessories INTRODUCTION...
Страница 22: ...1 8 NOTES...
Страница 25: ...Model 3430 2 3 Figure 2 1 Direct Transmission Geometry Figure 2 2 Backscatter Geometry OPERATION THEORY...
Страница 26: ...2 4 Figure 2 3 Backscatter Surface Density Effects Top Layer Effect Curves...
Страница 28: ...2 6 Figure 2 4 Effect of Moisture on Depth of Measurement...
Страница 48: ...3 20 NOTES...
Страница 62: ...4 14 NOTES...
Страница 66: ...5 20 D xxxx M xxxx Use keys Moist R xxxx to view data Moist Avg xxxx to view data...
Страница 88: ...A 14 NOTES...
Страница 111: ...Model 3430 C 17 Figure C 2 3430 Gauge Assembly MAINTENANCE...
Страница 113: ...Model 3430 C 19 Figure C 3 3430 Gauge Base Mechanical Assembly Figure C 4 3430 Source Rod Handle Assembly MAINTENANCE...
Страница 115: ...Model 3430 C 21 Figure C 5 3430 Gauge Preamplifier Assembly MAINTENANCE...
Страница 117: ...Model 3430 C 23 Figure C 6 3430 Gauge Scaler Assembly MAINTENANCE...
Страница 128: ...E 2 Date MS DS Date MS DS STANDARD COUNT LOG Gauge Serial Number...
Страница 129: ...Model 3430 E 3 Date MS DS Date MS DS STANDARD COUNT LOG Gauge Serial Number STANDARD COUNT LOG...
Страница 130: ...E 4 Date MS DS Date MS DS STANDARD COUNT LOG Gauge Serial Number...
Страница 140: ...Index 8 NOTES...
Страница 141: ...Model 3430 Warranty 1 NOTES WARRANTY...