While the basic confinement principles of geocells were readily understood, the influencing factors of the reinforcement were only investigated, tested and qualified by worldwide researchers. The research included plate loading box tests, full-scale moving wheel tests, and field demonstrations on Neoloy®-based PRS-Neoloy™ geocells, as well as geocells made from HDPE.
The results demonstrated that geocell performance depends on the geocell material; specifically that the performance of geocell-reinforced bases depends on the elastic modulus of the geocell. The geocell with a higher elastic modulus had a higher bearing capacity and stiffness of the reinforced base. Geocells made from Neoloy were found significantly better in ultimate bearing capacity, stiffness, and reinforcement relative to geocells made from HDPE.
Neoloy based geocells showed better creep resistance and better retention of stiffness and creep resistance particularly at elevated temperatures, verified by plate load testing, numerical modeling, and full-scale trafficking tests. The research also demonstrated that Neoloy-based PRS-Neoloy has a lower thermal expansion coefficient and creep reduction factor and higher tensile stiffness and strength than HDPE geocells.