The Challenge of Rutting & Pavement Deformation Under Heavy Traffic

Road rutting, deformation and premature pavement failure arising from heavy traffic load roads, repeated traffic cycles and weak subgrades are a global problem.

Even Singapore, rated as having the best roads on the planet by the World Population Review, is not exempt from these phenomena.

However, a modern solution in the form of Neoloy soil stabilization (Tough cells geocells) is emerging as a highly-effective countermeasure.

Installation of this technology is proven to vastly improve load distribution, extending road life by a significant number of years.

Who Benefits Most from Geocell-Based Road Reinforcement?

Civil engineers, highway designers, road infrastructure contractors and municipal and transport planners have struggled for decades with heavy traffic load roads.

While traditional fixes like thicker bases and more asphalt do work to an extent, they are costly and don’t fully address subgrade stress-transmission issues.

This is especially true over weak soils.

What infrastructure professionals ultimately seek are road surface durability, reliable subgrade performance, reduced maintenance and cost-effective reinforcement.

What Causes Road Rutting and Deformation?

The root causes of road rutting and deformation are numerous.

There are frequently issues in rolling out subgrade stabilization measures while inadequate compaction can often leave a project teetering.

Insufficient base thickness, heavy or repeated wheel loads and poor load distribution further contribute to road degradation.

How Geocells Work: The Mechanics of Load Distribution and Soil Confinement

Geocells for weak soils help tackle these issues.

The principle behind them is simple.

Geocells, often filled with aggregate or soil, form a 3D cellular confinement layer that spreads laterally and reduces vertical stress on subgrade.

This process reduces deformation and rutting risk.

Studies also show that Neoloy 3D reinforcement performs significantly better than 2D geosynthetics under cyclic and dynamic loading.

What Research Shows for Geocell Reinforced Pavements

Pavement reinforcement methods have also benefited from the rise of geocell technology.

A study on geocell reinforced sand embankments under static loading is telling.

This revealed that the limit bearing capacity increased by 12.7% to 44.4%, depending on the number of reinforcement layers and geocell configuration.

Further research has proven that geocell reinforcement improves stiffness and bearing capacity by up to 2.5 times compared to unreinforced base courses.

It also shows that geocells for road reinforcement can reduce permanent deformation by as much as 70% compared to unreinforced sections under cyclic loading.

As further evidence of the power of geocell installation for infrastructure, another study shows that using the technology decreases vertical stress transferred to subgrade by around 30% under vehicle crossing.

Protection of subgrade integrity and prolonged pavement life are thereby improved.

These findings demonstrate that geocells are not only a theoretical fix but a measurable solution with realworld benefits.

Neoloy Tough-Cells for Road Reinforcement

PRS Geo-Technologies has developed Neoloy Tough Cells, an industry leader in geocell reinforced foundations and related geocell functionality.

This technology has been used in more than 10,000 project worldwide as a trusted solution for load distribution, confinement, improved bearing capacity and stiffness and deformation reduction.

Clients revere Neoloy Tough Cells for their ability to reduce base course thickness or aggregate volume while still achieving of exceeding performance standards.

How to Implement Neoloy Tough-Cells -Based Reinforcement for Heavy-Traffic Roads

PRS recommends infrastructure professionals take the following steps when implanting geocell technology:

Understand soil types, load frequency and vehicle types using the road.

Select the appropriate height, cell size and infill material appropriate to geocell configuration.

Install the geocell layer at the correct depth (base/subbase), fill with suitable aggregate or soil, and compact properly.

Build the base and surface courses over the geocell reinforced layer.

Monitor performance over time, checking for settlement, rutting and surface deformation, and evaluate the need for maintenance.

When to Choose Neoloy Tough-Cells Reinforcement vs Unreinforced Pavement Methods

Geocells for weak soils should be selected when subgrade soils are fragile or variable and likely to deform under load.

They should also be preferred when deformation risk is high to the constant presence of trucks, buses and other vehicles.

Engineers, contractors and planners on a budget will also want to take this option due to its proven cost-efficiency.

Having thinner base layers and not requiring as much aggregate is a guaranteed money-saver.

Neoloy® Tough-Cells provide the strongest stabilization on weak subgrades, regardless of the severity of soil weakness or the magnitude of applied loads.

Thanks to Neoloy’s exceptionally low permanent deformation, validated by ASTM D6992, Neoloy® delivers the lowest settlements under heavy, repeated traffic loads, ensuring long-term pavement performance even under extreme conditions.

As demonstrated above, Neoloy® enables the use of local, marginal, or recycled infill materials, transforming them through its unique 3D confinement mechanism into a high-performance, stiff, and durable structural layer. This capability is unmatched by soft HDPE geocells or other low-modulus alternatives.

These combined unique advantages make Neoloy® the most economical, efficient, and rapid-to-install reinforcement solution for modern road construction.
It is therefore no surprise that engineers, contractors, and road designers repeatedly choose Neoloy® for projects requiring long-term durability, cost reduction, and reliable performance on weak subgrades.

Build Strong, Long-Lived Roads with Geocells

Geocell reinforcement has been scientifically proven to significantly improve bearing capacity, reduce deformation, distribute load and prolong pavement life.

Given their cost-effectiveness and success in creating durable roads under heavy loads, infrastructure professionals would do well to consider solutions like NeoAlloy Tough Cells.