Site Selection / Preparation

Quiz

1. Does natural aggregate occur where nature placed it or where people need it?

2. What are the main types of natural aggregate used in the United States?

3. How were crushed stone and sand and gravel formed?

4. In how many regions can the United States be divided to describe aggregate availability and quality?

5. In what industry are crushed stone and sand and gravel primarily used for aggregate?

6. Sand and gravel deposits are products of what?

7. What is the principal geologic agent that affects the distribution of deposits of sand and gravel?

8. What other materials may be used as aggregate?

9. The top 10 producers of aggregate account for more than what percentage of total aggregate production?

10. Construction of one mile of four-lane interstate highway requires how many tons of aggregate?

Quiz Answers

1. Where nature placed it

2. Crushed stone and sand and gravel

3. By geological processes ? volcanoes, glaciers, wind, rivers and seas

4. 12

5. Construction

6. Erosion of bedrock and surface materials and the subsequent transport, abrasion and deposition of the particles

7. Water

8. Shells, ?clinker? and caliche, as well as certain types of waste and recycled cement concrete and asphalt. Aggregate also can be manufactured from clay and shale.

9. 20 percent

10. 85,000