5.3.2.2. Gap Grading

Try these first

1. 1.

   Define gap grading in your own words.

   Hint

   Think about what it means to have missing particles.

2. 2.

   What is segregation in concrete?

   Hint

   Consider how mixing might affect your cookie dough!

3. 3.

   What is gap grading?

   • A method of uniform grading
   • Omitting certain sizes in aggregates
   • Using only fine aggregates

   Hint

   Focus on the missing sizes.

4. 4.

   True or False: Gap grading always leads to stronger concrete.

   • True
   • False

   Hint

   Consider how missing sizes might create issues.

5. 5.

   You are given a set of aggregates with only coarse and fine sizes. Discuss how this gap grading might impact concrete strength and solutions.

   Hint

   Think about the consequences of missing sizes.

6. 6.

   Propose a concrete mix design for a structure that can withstand high loads using gap-graded aggregates. What considerations should be included?

   Hint

   Think about balancing gap grading with overall stability.