Question:
Which one of the following is NOT present in cement?
Which one of the following is NOT present in cement?
Options:
- 2CaO • SiO2
- 3CaO • SiO2
- 4CaO • SiO2
- 3CaO • Al2O3
- 2CaO • SiO2
- 3CaO • SiO2
- 4CaO • SiO2
- 3CaO • Al2O3
Correct Answer: 4CaO • SiO2
Explanation:
While cement contains various compounds involving calcium oxide (CaO), silica (SiO2), and aluminum oxide (Al2O3), the specific combination “4CaO⋅SiO2” is not a typical constituent of Portland cement.
While cement contains various compounds involving calcium oxide (CaO), silica (SiO2), and aluminum oxide (Al2O3), the specific combination “4CaO⋅SiO2” is not a typical constituent of Portland cement.