Soil Compaction continued Smooth-Wheel Roller 1 2/17/2015 - PDF document

2/17/2015 Soil Compaction continued Smooth-Wheel Roller 1

2/17/2015 Pneumatic Roller Sheepsfoot Roller 2

2/17/2015 Vibratory Roller Portable Compactors 3

2/17/2015 Compaction Specifications Relative Compaction Relative Density � � � � ��� � � ����� � ��� � � ��� Proctor Test Heavy roller, lots of passes Light roller, few passes 4

2/17/2015 Sand Cone Test Weigh bottle filled with sand before Weigh bottle filled with sand after Valve Difference is weight to fill cone, plate, hole Subtract weight to fill cone and plate Remainder is weight to fill hole Sand Cone Test 5

2/17/2015 Example SAND CONE CALIBRATION 12,5 12,530 30 1. INITIAL WEIGHT OF APPARATUS + SAND g 10,93 10,931 2. FINAL WEIGHT OF APPARATUS + SAND g 2 ‒ 1 3. WEIGHT OF SAND IN PLATE AND CONE g Example VOLUME OF HOLE DETERMINATION 10,93 10,931 4. INITIAL WEIGHT OF APPARATUS + SAND g 6,608 6,608 5. FINAL WEIGHT OF APPARATUS + SAND g 5 ‒ 4 6. WEIGHT OF SAND RELEASED g 6 ‒ 3 7. WEIGHT OF SAND IN HOLE g 7  453.6 8. WEIGHT OF SAND IN HOLE lb 94.9 94.9 9. UNIT WEIGHT OF SAND lb/ft 3 8  9 10. VOLUME OF THE HOLE ft 3 6

2/17/2015 Example WATER CONTENT DETERMINATION 2176 2176 11. WEIGHT OF WET SOIL + TARE g 1875 187 12. WEIGHT OF DRY SOIL + TARE g 12 ‒ 11 13. WEIGHT OF WATER g 158 158 14. WEIGHT OF TARE g 12 ‒ 14 15. WEIGHT OF DRY SOIL g 13  15 16. WATER CONTENT Example UNIT WEIGHT DETERMINATION 3627 3627 17. WEIGHT OF WET SOIL + TARE g 158 158 18. WEIGHT OF TARE g 17 ‒ 18 19. WEIGHT OF WET SOIL g 19  453.6 20. WEIGHT OF WET SOIL lb 20  10 lb/ft 3 21. WET UNIT WEIGHT 21  (1 + 16) 22. DRY UNIT WEIGHT lb/ft 3 7

2/17/2015 Balloon Density Test Nuclear Density Gauge 8

2/17/2015 Compaction Effects Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981 9

2/17/2015 Holtz & Kovacs, An Introduction to Geotechnical Engineering , 1981 10