Segmental block walls consist of concrete blocks manufactured to provide a mortarless facing system and geogrids which are connected to the facing blocks and extend horizontally back into the engineered backfill soil to create a composite structure. Maccaferri offers a segmental block and geogrid wall system where the geogrid connection strength to the facing blocks has been independently verified and certified by leading research institutes and testing laboratories. The geogrids provide a soil reinforcing function, thus improve stability of the soil fill.

Keystone Walls
Keystone blocks are mortorless concrete blocks with fiberglass locator pins that have a long history of use with Tensar uniaxial geogrids in New Zealand. Tensar uniaxial geogrids are produced from HDPE which is inert to chemical and biological attack. Load is carried mainly by bearing on the thick transverse bars, and transferred through the junctions to the longitudinal ribs at low deformations. Keystone block walls reinforced with Tensar have been used in residential areas to increase the available land for development as well as in road infrastructure projects including bridge abutment walls.