GEOCELLS
Geosynthetic technology uniquely suited to the African environment
Geocells are an example of geosynthetic technology uniquely suited to the African environment. Geocells are a 3D mechanical soil stabilization and road reinforcement method. The honeycombed cells create a new composite entity when filled with soil materials due to the unique interaction of geometry, soil and the cell-wall material. The stiff 3D mattress restrains the lateral movement of soil particles and maximizes the distribution of lateral and vertical stresses. The main advantage of geocells is the creation of a layer with significantly increased compressive, shear and bending stiffness (slab effect). This results in higher bearing capacity, lower stress/strain fields, resulting in lower deformations and extended service life. However, as Zeev Strahl of PRS – the veteran Israeli manufacturer of geocells – states, this is where Neoloy, a nano-polymeric alloy comes into play. “In the end, it is the stiffness and durability properties of material (beside the cell geometry) that the geocell is manufactured from that determines the
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CR | May-June 2020
level of engineering performance. Neoloy is an innovative alloy developed by PRS specifically for geocells. Studies and field trials by leading civil engineering faculties and engineering companies around the world have validated that geocells made from Neoloy show significantly better ultimate bearing capacity, stiffness, and reinforcement relative to geocells made from conventional HDPE geocells, particularly for the entire life span of the roads pavements,” he adds. The Neoloy Geocells’ stiffness, resistance to deformation (creep)and long-term design strength make geocells more suitable for the demanding requirements of infrastructure projects. Projects undertaken in Africa for the Neoloy Geocell include: weak subgrade stabilization and reinforcement for paved and gravel roads, railroad embankments, terminal storage, container yards, airfields and landfills from Northern to Southern Africa and from the Gold Coast to the Horn of Africa. Clients include UNOPS, mine owners , energy companies, railway authorities , port authorities, and government agencies and municipalities.
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