7.3.5. Aggregate Grading

Try these first

1. 1.

   What is continuous grading?

   Hint

   Think about what kind of grading helps reduce voids.

2. 2.

   Why is proper aggregate grading important?

   Hint

   Consider how voids or gaps might affect concrete's integrity.

3. 3.

   What does continuous grading help achieve in concrete mixes?

   • A. Higher voids
   • B. Optimal density
   • C. Weaker mixes

   Hint

   Consider what happens to the structure with less void space.

4. 4.

   True or False: Gap grading can result in segregation in concrete mixes.

   • True
   • False

   Hint

   Think about how materials interact when sizes are missing.

5. 5.

   Design an aggregate grading plan for a high-performance concrete mix intended for a highway bridge. Explain your rationale for the chosen grading pattern.

   Hint

   Refer to how traffic and weather conditions will affect the concrete.

6. 6.

   Evaluate a concrete mix that has multiple missing aggregate sizes in its grading. Discuss potential structural concerns this gap grading might introduce.

   Hint

   Relate it to the structural integrity and expected performance of the concrete.