2.2. Major Compounds (Bogue’s Compounds)

Try these first

1. 1.

   What is the percentage range of Tricalcium Silicate (C₃S) in cement?

   Hint

   Think about its role in early strength.

2. 2.

   Name the compound that contributes to long-term strength?

   Hint

   Consider which compound reacts slowly.

3. 3.

   Which compound contributes the most to early strength?

   • C₂S
   • C₃S
   • C₃A

   Hint

   The name has 'tri' indicating three calcium oxides.

4. 4.

   True or False: C₄AF significantly contributes to the strength of cement.

   • True
   • False

   Hint

   Think about what else C₄AF does.

5. 5.

   Calculate the expected contribution of each Bogue compound to a cement mixture where 45% is C₃S, 25% is C₂S, 10% is C₃A and 8% is C₄AF. What properties will this cement exhibit?

   Hint

   Analyze how each component contributes to the overall characteristics.

6. 6.

   Propose a modification to optimize the hydration properties of cement with high C₃A content.

   Hint

   Consider what happens in hydration without additives.