1. Failure Mechanism in Hardened Concrete

Try these first

1. 1.

   What is tensile failure?

   Hint

   Think of how materials behave under stretching forces.

2. 2.

   Name the primary cause of compressive failure.

   Hint

   Consider the opposite of pulling forces.

3. 3.

   What happens in tensile failure?

   • A) Cracking due to compressive overload
   • B) Cracking due to tensile stress
   • C) Crushing of concrete
   • D) Shear cracking

   Hint

   Remember how tensile forces affect materials.

4. 4.

   True or False: Compressive failure results from concrete being crushed under excessive stress.

   • True
   • False

   Hint

   Think about what happens to concrete under heavy loads.

5. 5.

   A new bridge is built with reinforced concrete beams. During the first season, cracks appear in the tension zones of the beams. Discuss the likely failure mechanism and preventative measures that could have been employed.

   Hint

   Consider design codes that address tensile strength.

6. 6.

   Analyze a university campus scenario where concrete structures are showing signs of durability-based failure. Discuss environmental impacts and engineering solutions.

   Hint

   Think about winter and moisture relations with concrete.