Material used as a leveling and joint-filling agent during the installation of interlocking concrete or stone surfaces is a fine, granular substance. It provides a stable base, facilitates proper drainage, and helps lock the paving units in place. For example, it is often applied between brick walkways or driveways to create a smooth, even surface.
Its significance lies in its ability to prevent movement, inhibit weed growth, and contribute to the overall longevity and aesthetic appeal of paved areas. Historically, similar materials have been employed in construction to ensure stability and prevent settling, though modern formulations offer enhanced properties such as polymeric additives for increased durability.
