‘Structural soil’ is an engineered planting medium which can meet or exceed pavement design and installation requirements while remaining root penetrable and supportive of tree growth.
CU Structural soil was researched and developed in the 90’s by Cornell University’s Urban Horticulture Institute. In 1999, AMEREQ signed a licensing agreement with Cornell University and currently holds the patent rights to Cornell’s CU-Structural Soil™ Urban Tree Planting Mix. It is marketed as CU-Structural Soil™ for quality control and is produced by a network of qualified AMEREQ-licensed companies.
CU- Structural Soil is made up of crushed stone, clay loam, and a hydrogel stabilizing agent. The materials can be compacted to meet all relevant pavement design requirements yet allow for sustainable root growth. This soil essentially forms a rigid, load-bearing stone lattice and partially fills the lattice voids with soil. Structural soil provides a continuous base course under pavements while providing a material for tree root growth. This shifts designing away from individual tree pits to an integrated, root penetrable, high strength pavement system.
Read Custom Soils is licensed by Amereq, Inc. to manufacture CU Structural Soil and has dozens of successful installations throughout New England.