Identification should include
- portland cement
- aggregate
- sand
- gravel
- rock/crushed stone
- chemical additives
- water.
Process/Skill Questions:
- What are the ingredients of concrete?
- What is the difference between portland cement and concrete?
- What is portland cement? What is its purpose, and in what units is it sold?
- What determines the strength of the concrete materials?
- Why is gravel not included in a sand/topping mix?
- What is the relationship of the size of gravel to the thickness of the slab or wall?