Interlocking pavers are constructed to connect or “interlock” with the pavers around it to provide enhanced strength, structural integrity and durability.
This is accomplished in several ways, including the materials used in their construction, sometimes by their unique interlocking shapes, but always by packing fine, special sand into the spaces between them. In fact, the sand actually adds structural integrity, which makes such pavers easier to install because no cement is needed.
Interlocking pavers are created using sand, gravel, cement, very little water, and whatever colors are desired. They are relatively impervious to weather so their durability is assured.