3.2. Material Characteristics

Try these first

1. 1.

   What is the swell factor, and why is it important in earth-moving operations?

   Hint

   Think about how material changes volume during transportation.

2. 2.

   Define rolling resistance and give an example.

   Hint

   Relate it to how heavy vehicles handle different surfaces.

3. 3.

   What is a key reason for the swell factor increase in push-loaded scrapers?

   • More weight
   • Increased compaction
   • Less moisture

   Hint

   Think about how pushing affects materials physically.

4. 4.

   Is it true that rolling resistance affects the operation speed of scrapers?

   • True
   • False

   Hint

   Consider how resistance works when moving heavy loads.

5. 5.

   A construction site requires moving 500 cubic meters of earth involving varied terrains. If the swell factor for the material is 0.8, calculate the required bank cubic meters and the effective load volume using a 10% increase due to push loading.

   Hint

   Use the swell factor to guide your conversion.

6. 6.

   Evaluate the cost-effectiveness of using 5 scrapers versus 6 scrapers given a total operating time alongside the associated pusher cycle times to find the optimal operational setup.

   Hint

   Balance productivity with total costs across both scenarios.