Cement is in colloidal form of powder.which floats due to surface tension of water.simple.The density of the cement ranges from 1000 to 1300 Kg/Cum.Very strictly cement must not float or float at balance.yet the tiny particles floats due to surface tension rather than full quantity of cement by buoyancy.

Yes..it should be as it should float on water for some time before sinking

Can Cement Float on Water?

Cement is a commonly used building material in construction projects. It is a fine powder that, when mixed with water, forms a paste that can harden over time. While cement itself has a higher density than water, it cannot float on water in its raw form. Here's why:

1. Density of Cement
Cement has a density ranging from 3.1 to 3.3 grams per cubic centimeter (g/cm³). This means that a given volume of cement weighs more than an equal volume of water. As a result, cement has a higher density than water, which is a characteristic of materials that generally sink in water.

2. Cement and Water
When cement is mixed with water, a chemical reaction called hydration occurs. This reaction causes the cement particles to bind together, forming a solid mass known as concrete. During hydration, the water molecules penetrate the spaces between the cement particles, resulting in a reduction in the overall density of the mixture.

3. Concrete vs. Cement
It is important to note the difference between cement and concrete. Cement is an ingredient used to make concrete, which also includes aggregates (such as sand and gravel) and water. Concrete has a lower density than cement alone because the aggregates provide a lighter filler material, reducing the overall density of the mixture.

4. Floating and Sinking
In order for a material to float on water, it needs to have a lower density than water. While cement alone does not meet this requirement, properly mixed concrete can have a density that is less than that of water. This is achieved by adding lightweight aggregates or using a specific mix design that incorporates air entrainment. These techniques reduce the overall density of the concrete and enable it to float on water.

Conclusion
In summary, cement itself cannot float on water due to its higher density compared to water. However, when cement is mixed with water and other materials to form concrete, it is possible to create a mixture with a lower density that can float on water. Understanding the difference between cement and concrete is essential to grasp this concept.