2. Concrete

Try these first

1. 1.

   What is compressive strength?

   Hint

   Think about how weight affects materials.

2. 2.

   What ratio of tensile strength does concrete typically represent compared to compressive strength?

   Hint

   Remember, tensile strength is much weaker.

3. 3.

   What is the typical compressive strength range of concrete?

   • 1,000 - 2,000 psi
   • 3,000 - 6,000 psi
   • 10,000 - 12,000 psi

   Hint

   Think about common construction standards.

4. 4.

   Is concrete capable of withstanding tensile forces without reinforcement?

   • True
   • False

   Hint

   Remember its strength ratios.

5. 5.

   A concrete structure has been reinforced with steel to improve its tensile strength. If the compressive strength is measured at 6,000 psi and the tensile strength is observed at 600 psi, assess the structure's performance based on these values.

   Hint

   Consider how lateral forces affect structures.

6. 6.

   Given statistics that increased water in the concrete mix decreases compressive strength by 20%, calculate the new compressive strength if the original strength was 5,000 psi.

   Hint

   Think about the percentage decrease and how to apply it.