7.3.7. Trial Mixes

Try these first

1. 1.

   What is the primary purpose of a trial mix?

   Hint

   Think about validation of lab designs.

2. 2.

   Define slump in the context of concrete.

   Hint

   It involves how the concrete flows or settles.

3. 3.

   What purpose does a trial mix serve in concrete design?

   • A. To test a design before actual mixing
   • B. To predict weather impact on concrete
   • C. To evaluate aesthetics of concrete
   • D. To determine the color of concrete

   Hint

   Focus on the trial mix's role in testing.

4. 4.

   True or False: The slump test measures the compressive strength of concrete.

   • True
   • False

   Hint

   Think about what slump specifically assesses.

5. 5.

   You performed a trial mix and found the concrete to have a slump of only 2 cm, which is too low for your project. Discuss two modifications you can make to the mix to improve workability.

   Hint

   Think about common ways to adjust for low workability.

6. 6.

   After several trial mixes, you notice that your concrete consistently lacks strength compared to your target. Propose a detailed plan to diagnose and remedy this issue.

   Hint

   Focus on the balance of materials in your mix design.