What is meant by grout in construction?

Grout in construction is best described as a stable colloidal suspension of powdered cement and additives in water. This definition accurately captures the mixture's composition and its primary purpose. Grout is often used to fill gaps between tiles, stones, or other masonry products, helping to provide structural support, enhance stability, and prevent water ingress.

The use of additives in grout mixtures can provide various properties such as increased strength, reduced shrinkage, or improved adhesion, further distinguishing it from other materials like concrete. Unlike simply a decorative finishing mortar or a waterproofing material, grout's function focuses on filling spaces and securing elements in place, which is essential during the installation of tile or stone surfaces.

Other options may relate to aspects of construction but do not capture the specific characteristics and uses of grout as effectively as the correct choice does.