4.1.6. Shrinkage-reducing Admixtures (SRA)

Try these first

1. 1.

   What is the primary purpose of Shrinkage-reducing Admixtures?

   Hint

   Think about how water affects concrete as it dries.

2. 2.

   Name one application of SRA.

   Hint

   Where might concrete be likely to crack due to its use?

3. 3.

   What is the primary function of Shrinkage-reducing Admixtures?

   • Increase strength
   • Minimize shrinkage
   • Improve workability

   Hint

   Focus on the drying process and its effects on concrete.

4. 4.

   True or False: SRAs help increase the surface tension of water in concrete.

   • True
   • False

   Hint

   Remember how surface tension influences moisture retention.

5. 5.

   Calculate the expected benefits of using SRA in a bridge project: what reduction in cracks can you anticipate based on research data?

   Hint

   Look into statistics pertaining to SRA effectiveness.

6. 6.

   Design a concrete mix for a bridge deck that incorporates SRA, detailing the proportions and why you chose them.

   Hint

   Focus on achieving the right balance for strength and minimal shrinkage.