The function of sand in mortar is

Options

A. To prevent excessive shrinkage which might result in cracks.
B. To decrease plasticity of the mass
C. To make the mass compact
D. To decrease the hardness

Answer

**Step-by-Step Text Solution:**

1. **Understanding Mortar Composition**: Mortar is a mixture primarily composed of cement, water, and aggregates, with sand being a key component.

2. **Role of Sand as an Inert Material**: Sand serves as an inert material in mortar. This means it does not chemically react with the other components but provides bulk and volume to the mixture, which is essential for economic reasons.

3. **Prevention of Shrinkage and Cracking**: One of the main functions of sand in mortar is to prevent shrinkage and cracking during the setting process. As mortar dries, it can shrink, leading to cracks if not properly managed. The presence of sand helps to mitigate this issue.

4. **Providing Surface Area for Adhesion**: Sand also offers a rough surface area that allows the cementing materials to adhere better. This increased surface area facilitates the spreading of the cement paste, ensuring a stronger bond within the mortar.

5. **Conclusion**: In summary, the function of sand in mortar includes providing volume, preventing shrinkage and cracking, and enhancing the adhesion of cementing materials.

---