Problem
1. Why is concrete the most widely used engineering material?
2. Compared to steel, what are the engineering benefits of using concrete for structures?
3. Define the following terms: fine aggregate, coarse aggregate, gravel, grout, shotcrete, hydraulic cement.
4. What are the typical unit weights for normal-weight, lightweight, and heavyweight concretes? How would you define high-strength concrete?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.