What constitutes grout in construction?

Grout in construction is defined as a mixture of cementitious materials and water. This composition allows grout to fill gaps, provide support, and offer a stable binding agent in various construction applications, including masonry and tiling. The primary function of grout is to fill voids and create a strong bond between building materials, which is essential for structural integrity.

Cementitious materials may include not just traditional Portland cement but can also consist of different additives or types of cements, such as fly ash or slag, enhancing the performance characteristics of the grout. When mixed with water, these materials create a slurry that can be poured or injected into spaces, making it ideal for leveling surfaces or reinforcing structures.

In contrast, other options misrepresent the nature of grout. A mixture of cement and sand only would refer to mortar rather than grout, while a substance solely designed for waterproofing does not accurately reflect the broad applications and formulations of grout. Lastly, while a high-strength concrete mix might be used in heavy-duty applications, it does not serve the specific function of grout in filling and bonding gaps, which distinguishes grout as a unique construction material.