The ratio of cement to sand in a mix varies depending on the application. However, a common general-purpose mix is 1:2 or 1:3 (cement:sand).
While a standard concrete mix typically includes aggregate and has a ratio of 1:2:3 (cement: sand: aggregates), the question specifically asks about the cement-sand mix ratio. Therefore, the following points are relevant:
- Mortar Mixes: Cement-sand mixes are most commonly found in mortar. The ratios used will depend on the strength and workability required.
- General Purpose Mortar: A 1:3 ratio (1 part cement to 3 parts sand) is often used for general-purpose mortar. This provides a good balance of strength and workability.
- Stronger Mortar: A 1:2 ratio (1 part cement to 2 parts sand) creates a stronger mortar, suitable for applications needing higher compressive strength.
- Weaker Mortar: A 1:4 or 1:5 ratio creates a weaker mortar that is often used as a bedding layer or to fill gaps.
In summary, while concrete generally uses a cement:sand:aggregate ratio, the ratio of cement to sand alone typically falls within the range of 1:2 to 1:3 for mortar applications, adjusting based on desired strength and workability.
