As a result, most construction specifications outline these geocell systems have a service life exceeding 20 years, and many applications yield even better results.
That said, geocell life expectations should be brought down to earth accordingly with respect to the pricing of the given system being delivered.
What Affects the Service Life of Geocell
The actual life of geocell systems can be dependent upon:
- What the original seeding materials were
- Environment, for example UV, chemicals and temperature
- How they were installed – correct fill placement
- What they are used for – slope stabilization, road foundation etc which may be subject to different levels of strain
- What the fill or surface loads placed on them will be in service
- The history of the site – compacted grade etc
Maximizing the Service Life of Geocell
One can maximize the service life of geocell as a system by utilizing quality raw materials, building accurately to spec, placing and compacting fill correctly.
Correct Service Life for HDPE Geocell Systems
Continued high-quality geocell lifespan in practice yields levels of service way above 20 yrs.
The majority of well-built HDPE geocells can expect lives between 30-50 years in most applications, installed correctly.
Do Geocells Degrade?
Where geocells sit close to or at the top of the ground, one may ask:
Does the product last that long?
Does geocell itself not degrade in the sun — how can I expect 20 years or more of use?
Your HDPE geocell may not degrade on terms of time-in-place usability, or load placement, for 20 years or more. HDPE 3010 makes for excellent use across life cycles, and the nature of geocell design tends to favour the quantity and range of backfill, and range of general application.
Most HDPE geocells are products are heat, and they may be deployed using a degree of UV stabilisation in order to help the system maximise performance. Professionally manufactured products are UV resistant, and include many controlled raw materials often according to specification requirements.
About the long term, HDPE may become more brittle, may lose some ductile properties on a longer time period delivery, continuously under flashing UV, and environmental actions such as freeze thaw.
Typical Expectations
- If buried below the surface: 30-50 years
- If taken by utilise under UV: 15-25 years
- Heavy duty uses: 20-40 years
The actual service life of the geocell is greatly dependent on intimate treatment from harsh sunlight, chemic action, freeze/thaw effects, heavy-duty loading cycles.
Projects that are built using virgin HDPE material, without less that ideally proportioned, properly protected with carbon black for UV protection, better guarantee service life than those composed in recycled plastic.
What Delivers the Lifespan of Your Geocell?
The Materials Used
The biggest single source of variance in the service life of geocells is what they are made from.
A quality HDPE material will give you:
- Better tensile properties
- Better environmental stress crack resistance
- UV Resistance
- Oxidation Resistance
- Excellent Long-term Stability
- Longer Service Life
Using cheap recycled material may allow us to lower the initial pricing, but it will often be at the cost of a drastically reduced service life, especially in regions with ambient high temperatures or where moderate to heavy loading cycles are expected.
For long-term infrastructure projects, virgin HDPE material geocell is generally specified.
Sunshine and UV Exposure
Ultraviolet radiation from the sun is one of the main culprits in polymer aging.
If your geocells are left exposed for long periods of time, UV rays will gradually ‘cook’ the material surface.
Manufacturers are increasing UV performance by including:
- Carbon black
- Anti-aging additives
- UV stabilizers
Textured and perforated geocells used in slope protection applications are often directly exposed to sunlight, so UV protection is especially necessary.
To help prolong service life:
- Store geocells undercover prior to installation
- Fill cells as soon as practicable post-deployment
- Cover exposed sections with soil, vegetative overgrowth or aggregate whenever practical
Installation
Even high-quality HDPE geocells will fail early if installation is incorrect.
Common problems with installing geocells:
- Poor anchoring
- Uneven subgrade preparation
- Over-stretching the panels
- Weak weld points
- Inadequate infill compaction
Correct geocell installation helps evenly distribute loads and reduce stress concentrations within the cellular confinement system.
Professional installation greatly improves the design life.
Environmental Conditions
Different environments affect durability differently.
Harsh Conditions That Promote Accelerated Aging
- Desert heat
- Freeze thaw cycles
- Acidic soil
- Saltwater environments
- Mining chemicals
- Heavy rain erosion
For aggressive environments thicker and higher strength geocells are normally specified.
Traffic Load & Application Type
Applications with heavy traffic naturally place a larger demand on geocell systems.
Applications with high loading include:
- Mining haul roads
- Container yards
- Airport pavements
- Industrial access roads
These projects frequently demand:
- Greater geocell height
- Greater thickness of sheet material
- Stronger weld spacing
- More suitable infill material
A properly designed load support system can maintain serviceability under long-term traffic loading.
Does Geocell Degrade Underground?
One of the primary advantages of geocells is that most systems remain buried beneath aggregates or soil.
Being underground shields the material from:
- UV radiation
- Fluctuations in temperature
- Mechanical abrasion
- Exposure to the weather
Due to this, buried geocell systems will frequently outlast exposed geomaterials by many years.
In many road stabilization projects, geocells are still sound decades later.
How Can I Maximize the Service Life of the Geocell?
Specify Virgin HDPE Material
Design life has a lot to do with material performance. “Virgin” HDPE generally has greater longevity than in-service recovery (recyclable) plastic.
Always request:
- Material test reports
- Tensile strength information
- Carbon black content
- Environmental stress crack resistance testing
Specify the Correct Geocell Specification
The correct “specification” is very important in determining the potential service life of the project.
Key parameters are:
- Geocell height
- Thickness of sheet material
- Weld spacing / frequency
- Perforated / non perforated structure
- Surface texture
Heavy duty projects will need to be contained by a stronger system.
Specify Quality Infill Material
The infill works hand in hand with the geocell structure.
Quality aggregate or compacted earth infill helps reduce movement within the cells and guards against undue loading to the cell walls.
Poor infill selection can reduce the lifespan of the entire system.
Ensure Proper Drainage
Poor drainage can cause the subgrade to soften, increasing pressure on the confinement system.
Duties for proper drainage design:
- Slope protection
- Channel protection
- Retaining wall systems
- Erosion control projects
Is Geocell Stabilization Better Than Traditional?
In many instances, yes.
Compared with conventional stabilization where aggregate fills a thick layer or constructing concrete barriers, geocells provide:
- Longer-term confinement of the soil
- Lower maintenance
- Less aggregate used overall
- Faster installation
- Greater resistance to erosion
- Greater adaptability as the ground moves
Due to the honeycomb type of confinement exhibited by these systems, geocell develops a better tolerance to settlement and minor movement of the ground in the place of premature cracking.
Typical life expectancy: 20-40 years.
Why Should Geocell Quality Matter to the Project Lifespan?
Low-cost geocells for international infrastructure projects may seem an attractive option in terms of price paid per square meter.
But a poor quality geocell will only lead on to:
- Premature deformation
- Welds delaminating
- Cracking caused by UV rays
- The loss of confinement strength
- Costly repairs
Medium geocell manufacturers will normally provide:
- Results based on ASTM or ISO standards
- Inspection report on the materials
- Verification of welds
- Assistance with design of high-caliber specifications
- Custom specifications for specific requirements
For distributors or contractors, long-term lifespan effectively amounts to “better” than just getting the ‘best’ price paid per geocell.
FAQ
How long does a HDPE geocell last underground?
A high-quality HDPE geocell can typically last 30-50 years underground because it is protected from sunlight and weather exposure.
Does sunlight damage geocell?
Yes, sunlight gradually deteriorates geocell. Long exposure can weaken the structure of the system. Carbon black and additives improve the geocell’s UV resistance.
What is the best material for geocell?
Generally, large quantities of virgin HDPE make for materials that are considered the best for producing geocells with long-term durability.
Can geocell crack over time?
Low-quality geocells may crack. Proper material choice and installation reduce this risk.
Does geocell require maintenance?
Carefully placed geocell underground needs no maintenance. Of course, surface applications require occasional inspections for liability and performance.
Is thicker geocell always better?
Not necessarily; the geocell’s height varies based on loading conditions, soil type and project specifications.
Conclusion
Some even call geocell systems “long-term” stabilizations.
When manufactured with high-quality HDPE materials and correctly installed, geocell can last for many years. Actual lifetime depends on exposure to elements, loading conditions, the quality of the geocell used and how well designed/installed they are.
But one of the biggest factors in ensuring reliability for years down the line is that clients find a reliable manufacturer to begin with maintaining quality control and good engineering practices.