Question : The approximate amount of silica present in cement is:
Option 1: between 27% and 35%
Option 2: between 37% and 45%
Option 3: between 17% and 25%
Option 4: between 47% and 55%
Correct Answer: between 17% and 25%
Solution : The correct option is between 17% and 25% .
Silica, often known as silicon dioxide, is the second most common cement ingredient, accounting for 17 to 25%. Cement is mixed with lime to increase setting time and serve as a binding agent. Because silica and calcium oxide combine to generate calcium silicates, the primary constituent of cement, silica plays a significant role in the composition of cement.
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