Final Answer:
One example of a supplementary cementitious material is fly ash. MMC uses this ingredient to replace up to 30% of the cement in their mixtures.
Step-by-step explanation:
Fly ash is a supplementary cementitious material (SCM) widely utilized in concrete mixtures. In the case of MMC (presumably a concrete or construction-related company), they incorporate fly ash to substitute a portion of the traditional cement.
The specific replacement percentage is up to 30%. This means that for every unit of cement in their mixtures, MMC integrates fly ash to account for 30% of that unit.
The use of supplementary cementitious materials like fly ash is a sustainable practice in the construction industry. It not only reduces the demand for cement, a resource-intensive material, but also contributes to environmental conservation by utilizing industrial by-products.
Fly ash, a residue from coal combustion, is known for its pozzolanic properties, enhancing the durability and strength of concrete. This approach aligns with modern construction practices aiming for both economic efficiency and environmental responsibility.