1. CEE 404 Winter 2011 1 Productivity Refresher

2. CEE 404 Winter 2011 2 Excavator Cycle Time

3. CEE 404 Winter 2011 3

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6. 6 Caterpillar 375 Excavator Pictures from Caterpillar, Inc.

7. CEE 404 Winter 2011 7 Working Ranges Pictures from Caterpillar, Inc.

9. CEE 404 Winter 2011 9 Bucket Specifications Table from Caterpillar, Inc.

10. CEE 404 Winter 2011 10 Fill Factor Capacity based on SAE J296 MaterialFill Factor (%) Moist loam, sandy clay100 – 110% Sand and gravel95 – 110% Hard, tough clay80 – 90% Rock – well blasted60 – 75% Rock – poorly blasted40 – 50% Table values from Peurifoy et al. (1996), Construction, Planning, Equipment and Methods, 5 th Ed. Rated Capacity vs. Struck Capacity

11. CEE 404 Winter 2011 11 Cycle Time Depth of cut = 40 to 60% Maximum swing angle = 30 to 60° Table values from Peurifoy et al. (1996), Construction, Planning, Equipment and Methods, 5 th Ed.

12. CEE 404 Winter 2011 12 Cycle Time Improvement From Komatsu: http://www.komatsu.com/ce/support/v04214http://www.komatsu.com/ce/support/v04214

13. CEE 404 Winter 2011 13 Calculate Productivity

14. CEE 404 Winter 2011 14 Roller Productivity

15. CEE 404 Winter 2011 15 Roller Productivity Example –12 ft wide mat –3 mph roller speed –3 passes for density –66 in. drum width –Efficiency = 80% Roller speed Effective roller speed Actual drum width Effective drum width Paving width Number of passes to cover mat width once Number of repeat passes Total passes Adjusted total passes Roller efficiency Effective production rate

16. CEE 404 Winter 2011 16 Logistics What do you need? When do you need it? Where do you put things? How do you move things? Where is the risk? The process of acquiring, storing, moving, and using personnel, equipment and material.

17. CEE 404 Winter 2011 17 Primary References Caterpillar (2006). 365C L Hydraulic Excavator specifications. National Asphalt Pavement Association (NAPA). (1996). Balancing Production Rates in Hot Mix Asphalt Operations. IS 120. NAPA, Lanham, MD. Purifoy, R.L.; Ledbetter, W.B. and Schexnayder, C.J. (1996). Construction Planning, Equipment, and Methods. Fifth edition. McGraw-Hill, New York, NY. CWS/IMAC (Industrial Machinery Attachment Company). Website: http://www.imac.ca http://www.imac.ca