7.4.6. Determine Admixture Dosage

Try these first

1. 1.

   What is an admixture?

   Hint

   Think about the additional materials we use in concrete.

2. 2.

   Name a type of admixture that increases workability.

   Hint

   Remember the substance that allows easier mixing?

3. 3.

   What is the primary purpose of determining admixture dosage?

   • To enhance concrete durability
   • To meet structural requirements
   • To optimize workability

   Hint

   Think about how an ideal concrete mix behaves during placement.

4. 4.

   Trial mixes help in evaluating the effects of admixture dosage on concrete properties. True or False?

   • True
   • False

   Hint

   Recall the role of testing in achieving optimal concrete properties.

5. 5.

   You are tasked with creating a mix for a project that requires high durability in a marine environment. The initial trials have resulted in low compressive strength. What adjustments would you recommend?

   Hint

   Consider components that enhance structural integrity against harsh conditions.

6. 6.

   If a trial mix with 1% superplasticizers resulted in an excessive slump, how might you troubleshoot and document the findings?

   Hint

   Monitoring how each trial affects the mix is crucial.