Polyester Biaxial Geogrid

PVC coated polyester biaxial geogrid 30-30 to 1200-1200 kN/m, 1-6 m wide, high modulus low elongation reinforcement for roadbeds, slopes and retaining walls.

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SKU: GEO-DC6770 Category: Geosynthetics

Geosynthetics

Product Overview

The polyester biaxial geogrid is warp-knitted from high-tenacity multifilament polyester yarn and coated with PVC or a modified polymer for UV and alkali resistance. Because the same tensile strength is provided in both warp and weft directions, the polyester biaxial geogrid confines granular layers in two directions and raises the bearing capacity of the base course.

With tensile grades from 30 kN/m to 1200 kN/m, the polyester biaxial geogrid covers light landscape reinforcement up to heavy haul road and airport apron construction. Standard roll width is 1 - 6 m and roll length 50 - 200 m, so the polyester biaxial geogrid can be laid with few joints on large sites.

Quick Information

Material: high-tenacity polyester (PET) multifilament yarn, PVC coated
Tensile strength: 30 - 1200 kN/m (warp = weft)
Elongation at break: 10 - 15 %
Grid size: 12.7 x 12.7 to 76.2 x 76.2 mm
Roll width: 1 - 6 m
Roll length: 50 - 200 m
Coating: PVC / modified polymer, UV stabilised

Specification Table

Item	30-30	50-50	60-60	80-80	100-100	120-120	150-150	260-260	400-400	600-600	800-800	1200-1200
Tensile strength warp (kN/m, ≥)	30	50	60	80	100	120	150	260	400	600	800	1200
Tensile strength weft (kN/m, ≥)	30	50	60	80	100	120	150	260	400	600	800	1200
Elongation at break	10 - 15 %
Grid size	12.7x12.7 / 25.4x25.4 / 50.8x50.8 / 76.2x76.2 mm
Roll width	1 - 6 m
Roll length	50 - 200 m
Coating	PVC or modified polymer, UV and alkali resistant

Key Features

Bidirectional reinforcement: equal warp and weft strength lets the polyester biaxial geogrid confine aggregate in both directions.
High modulus, low elongation: the polyester biaxial geogrid mobilises its strength at only 10 - 15 % strain, so settlement is controlled early.
PVC coated for durability: the coating on the polyester biaxial geogrid resists UV, acid and alkali attack in buried service.
Interlock with aggregate: the 12.7 - 76.2 mm aperture of the polyester biaxial geogrid keys into crushed stone and prevents lateral spreading.
Easy installation: flexible rolls of polyester biaxial geogrid are unrolled by hand, cut with a knife and overlapped without special equipment.
Wide tensile range: twelve grades from 30-30 to 1200-1200 allow the polyester biaxial geogrid to be matched precisely to each design load.

Production

Raw Material

The polyester biaxial geogrid starts from high-tenacity multifilament PET yarn with low creep. Yarn tenacity and twist are inspected before knitting because they set the final strength of the polyester biaxial geogrid.

Production Process

Warp knitting builds the grid in one pass, after which the polyester biaxial geogrid is coated with PVC or modified polymer, dried and cured. Coating weight and curing temperature are controlled so the polyester biaxial geogrid keeps its aperture and flexibility.

Quality Control

Each production lot of polyester biaxial geogrid is tested for tensile strength in warp and weft, elongation, grid dimensions and coating adhesion. Rolls are labelled with grade, batch and roll length so the polyester biaxial geogrid can be traced on site.

Applications

Road and highway base reinforcement: the polyester biaxial geogrid reduces base thickness over soft ground.
Railway trackbed: the polyester biaxial geogrid limits ballast penetration and lateral spread.
Retaining wall and steep slope: the polyester biaxial geogrid provides layer-by-layer reinforcement.
Airport apron and parking area: the polyester biaxial geogrid improves load distribution on granular pavement.
Landfill and yard platform: the polyester biaxial geogrid stabilises working platforms over weak subsoil.