Comparison of PRS-Neoweb with HDPE Geocell Material - Video
Geocells are commonly manufactured from HDPE due to its low cost and good chemical resistance. However, PE has low stiffness, low strength, high creep, and high coefficient of thermal expansion. PE stiffness can degrade over time by 75% (particularly under elevated temperatures) rendering HDPE geocells unsuitable for long-term use.
Neoloy polymeric alloys from PRS on the other hand, maintain their engineering properties over time and in high temperatures. This predictable durability makes Neoloy-based PRS-Neoweb suitable for the long-term confinement required in earth retention and road and rail pavements applications.
The Stepped Isothermal Method (SIM) was developed to predict the accelerated creep of polymers for a lifespan of 50-100 years (ASTM D6992). SIM measures the cumulative plastic deformation of the polymer product by subjecting it to a constant load at different temperatures for a specified time. The SIM method enables calculation of the allowed strength for long term design.