HDPE · PP · Cellular Confinement — Sourced From China
Geocell For Slopes,
Channels & Soft Ground.
A geocell is one weld, repeated ten thousand times. Strip thickness, resin density and seam strength decide whether the honeycomb holds its fill on a slope for decades or unzips in the first wet season — and none of the three is on a price-per-metre quote. We source HDPE and PP geocell from audited Chinese mills, quote it against the standard your engineer wrote — GB/T 19274 or GRI-GS15 — and pull-test the welds on your batch before it ships.
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What A Cheap Quote Leaves Out
Three Numbers Make Or Break A Cell
Every geocell quote names a cell height and a polymer. Almost none name the three properties that decide what happens after the infill goes in: wall thickness — the strip that takes the hoop stress when a cell fills; resin density — virgin HDPE holds its shape and its carbon black, regrind doesn't; and seam strength — the ultrasonic weld between strips, the joint that fails first when a panel hangs from a slope crest.
Here's the trap: a cheap panel is quoted by the square metre with a "nominal" wall that is already at the −10 % allowance before it leaves the mill, and welds nobody has pulled. On the pallet it looks identical to the real thing. On a slope with wet gravel in it, it isn't.
We quote the standard by name — GB/T 19274-2003 or GRI-GS15 — the mill certifies every batch on wall thickness, tensile yield and weld strength, and we pull-test the seam ourselves before loading. A mill that can't produce the weld numbers has answered the question.
Anatomy of a cell · the three properties we test
Density ≥ 0.940 g/cc, carbon black 2 – 3 %. Thinner or lighter is a different product wearing the same name — it buckles under the compactor and chalks in the sun.
The weld must be as strong as the strip; GB/T 19274 separately asks ≥ 100 N/cm on the weld itself. This is the number we pull on your batch.
The joint that carries a panel's own weight when it hangs from a crest anchor — pulled at both positions, because the edge and the centre fail differently.
Required values of the standards — not one mill's marketing sheet. Full tables, both standards, further down this page.
Cell To Structure
One Honeycomb, Four Different Jobs
Geocell is one product doing four jobs, and each job loads the cell differently. Match the structure first; cell geometry follows from it, and the model number comes last.
Swipe sideways for all four columns →
| Structure | What the cell does | Wall & infill | What to check |
|---|---|---|---|
| Slope-face protection | Holds topsoil or aggregate on the face. The panel hangs from the crest, so its own weight runs through the welds. | Perforated wall soil or aggregate infill — drains, lets roots lock cells together | Weld strength · anchoring & tendon plan |
| Riverbank & channel lining | Cells full of concrete or rock stay put under flow instead of washing out as a loose layer. | Solid or perforated, by design concrete or rock infill | Cell-to-cell connection · OIT (years of sun and water) |
| Load-bearing layer over soft subgrade | Confines the aggregate so wheel loads spread instead of punching through — a stiffer layer from the same stone. | Perforated wall well-graded aggregate | Wall thickness · yield strength (hoop stress) |
| Car-park & access-road base | Same confinement under traffic; gravel or grass surface that doesn't rut. | Perforated wall gravel or topsoil | Wall thickness · seam efficiency |
Cell height, weld spacing and wall thickness are made to your drawing — the mill lists no fixed series, so send the cross-section.
Describe the structure — we'll spec the cellGrades & Specifications
HDPE & PP Geocell: Every Requirement, Both Standards
Two tables, two standards. GB/T 19274-2003 is what the Chinese mill's factory certificate is issued against, for PP and PE geocell — it tests the finished sheet (strip, weld, cell-to-cell connection) and the resin behind it (stress cracking, low-temperature brittleness, softening point, antioxidant reserve). GRI-GS15 is the Geosynthetic Institute's specification for HDPE-strip geocell — the sheet North American and Middle-East engineers ask for — with S.I. and US units side by side.
Cell height, weld spacing and wall thickness are made to order — the mill lists no fixed series, so we quote against your drawing. If your tender specifies one standard, say which; every quote names it, and every order ships with the mill's batch certificate against it.
Download the geocell TDS (PDF, 2 pages)
PP & PE geocell · GB/T 19274-2003
Geosynthetics — Plastic geocell · required values for the finished sheet and for the raw strip
Swipe sideways for both columns →
| Property | Unit | PP geocell | PE geocell |
|---|---|---|---|
| Geocell sheet (cell wall and welds) | |||
| Appearance | – | Cell walls smooth, without bubbles, without grooves | |
| Tensile yield strength of cell wall | MPa | ≥ 23 | ≥ 20 |
| Tensile strength of weld | N/cm | ≥ 100 | ≥ 100 |
| Tensile strength of cell-to-cell connection — at sheet edge | N/cm | ≥ 200 | ≥ 200 |
| Tensile strength of cell-to-cell connection — at sheet centre | N/cm | ≥ 120 | ≥ 120 |
| Raw material of the strip | |||
| Environmental stress cracking (ESC), F50 | h | – | ≥ 800 |
| Low-temperature brittleness temperature | °C | ≤ −23 | ≤ −50 |
| Vicat softening temperature | °C | ≥ 142 | ≥ 112 |
| Oxidative induction time (OIT) | min | ≥ 20 | ≥ 20 |
| Sizes | |||
| Cell height × weld spacing × wall thickness | – | To order — quoted against your drawing | |
HDPE-strip geocell · GRI-GS15
Geosynthetic Institute · minimum average values unless marked as a range · S.I. and US units
Swipe sideways for both units →
| Property | Test method | S.I. units | US units |
|---|---|---|---|
| Wall thickness (nominal −10 %) | GRI-GS14 | 1.25 mm | 50 mils |
| Density (min. ave.) | ASTM D1505 / D792 | 0.940 g/cc | 0.940 g/cc |
| Seam efficiency (min. ave.) | GRI-GS13 | 100 % | 100 % |
| Tensile properties (min. ave.) | ASTM D6693 Type IV | ||
| Yield strength | 18 kN/m | 105 lb/in | |
| Break strength | 13 kN/m | 75 lb/in | |
| Yield elongation | 12 % | 12 % | |
| Break elongation | 100 % | 100 % | |
| Tear resistance (min. ave.) | ASTM D1004 | 155 N | 35 lb |
| Puncture resistance (min. ave.) | ASTM D4833 | 330 N | 75 lb |
| Direct shear friction angle | ASTM D5321 | 30° | 30° |
| Carbon black content (range) | ASTM D4218 | 2 – 3 % | 2 – 3 % |
| Carbon black dispersion | ASTM D5596 | see note | see note |
| Oxidative induction time, OIT (min. ave.) | |||
| Standard OIT | ASTM D3895 | 100 min | 100 min |
| High-pressure OIT | ASTM D5885 | 400 min | 400 min |
| Oven aging at 85 °C — % retained after 90 days | ASTM D5721 | ||
| Standard OIT (min. ave.) | ASTM D3895 | 55 % | 55 % |
| High-pressure OIT (min. ave.) | ASTM D5885 | 80 % | 80 % |
| UV resistance — % retained after 1,600 h | ASTM D7238 | ||
| Standard OIT (min. ave.) | ASTM D3895 | N.R. | N.R. |
| High-pressure OIT (min. ave.) | ASTM D5885 | 50 % | 50 % |
Required values of the standards, not one mill's test results. GRI-GS15: wall thickness is nominal with a −10 % allowance; tensile on ASTM D6693 Type IV specimens; OIT, oven aging and UV are tested once per resin formulation, the rest per production lot — ask for the formulation sheet with the batch certificate; carbon black dispersion is reported by category under ASTM D5596; N.R. = not required. GB/T 19274-2003: ESC is not specified for PP.
Before It Ships
Wall, Weld, Perforation — Checked On Your Batch
The mill's batch certificate covers wall thickness, tensile yield and weld strength against GB/T 19274-2003 or GRI-GS15 — whichever your order names. Then our pre-shipment inspection measures the panel itself: cell height, weld spacing and wall thickness against your drawing, the perforation pattern present and clean, and the pallet count — all photographed.
The seam is the one test we never leave to the certificate: weld strength is pulled on your batch. When a tender needs an independent sheet, we arrange a third-party lab test (Intertek / SGS) on the same batch.
Lab sheets and inspection photos reach you before the balance payment — leverage, then payment, in that order.
Sizes & packing · what goes on the quote
Loading reference from our own container tables. Price is quoted to specification — geometry, polymer, standard, m² and destination port — not from a list. Full container loading guide.
Price my quantity, landedStraight Answers
Geocell Sourcing FAQ
HDPE or PP geocell — which one should I specify?
Most tenders outside China specify HDPE, because GRI-GS15 — the specification engineers reference — is written for HDPE strip. Under GB/T 19274-2003 the two resins are tested differently: PE must survive 800 h of environmental stress cracking and stay ductile to −50 °C; PP has the higher softening point (≥ 142 °C) and no ESC requirement. Tell us which standard your drawing names and we quote that resin against it.
What does "seam efficiency 100 %" actually mean?
That the ultrasonic weld between two strips is as strong as the strip itself — the joint doesn't become the weak point. GRI-GS15 sets it at 100 % under GRI-GS13; GB/T 19274 separately requires ≥ 100 N/cm on the weld. It's the value we pull-test on your batch, because a panel that fails does so at the seam, not in the middle of a strip.
Perforated or solid cell walls?
Perforated for slopes, subgrades and car parks: the holes drain the cell, let roots grow through, and give the infill something to grip. Solid where you want the cell to hold what's in it — concrete-filled channel linings, for instance — though many channel designs still use perforated wall by choice. The perforation pattern is on our inspection sheet either way.
What cell heights and sizes are available?
Cell height, weld spacing and wall thickness are made to order — the mill's sheet lists no fixed series. Send the cross-section or the spec line from your tender and we quote exactly that geometry, with the standard named. Taller cells and closer welds cost more per square metre; the structure decides whether you need them.
How much geocell fits in a container?
Sections ship folded flat and palletised, so geocell packs well: our loading tables put palletised 50-400 geocell at roughly 43,000 m² per 40'HQ. Taller cells and thicker walls take more space per square metre. We run the container plan from the real panel dimensions before quoting, so the landed per-m² price is a fact, not a hope.
What do you actually test before it ships?
The mill certifies each batch on wall thickness, tensile yield and weld strength against the named standard. Our pre-shipment inspection measures cell height, weld spacing, wall thickness and perforation against your spec, counts pallets, and photographs it all. Weld strength is pulled on your batch. A third-party lab test is arranged on request. Everything reaches you before the balance payment.
Spec-Matched Quote
Your Drawing,
Our Weld Test
Tell us the structure — slope, channel, subgrade or car park — the cell height and wall your drawing calls for, and the square metres. We come back with the standard named, the cell geometry confirmed, and a landed price. Usually within one business day.
Standard named on every quote line
Seam strength pulled on your batch
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