Geotextile PP
1.Resistant to chemical corrosion (resistant to acids, alkalis, and salt solutions), and adaptable to complex geological and water quality environments.
2.Resistant to ultraviolet rays and aging, it has strong durability for outdoor use and a relatively long lifespan.
3.It has high tensile strength and good toughness, can withstand soil pressure and deformation, and is not easy to break.
4.It is lightweight but has high strength, facilitating transportation and construction laying.
5.It has a strong drainage and seepage - guiding capacity and is suitable for the anti - filtration and drainage systems of projects such as dams and roadbeds.
6.It has a thin thickness and takes up little space, saving material usage, and its comprehensive cost is lower than that of traditional sand and gravel filter layers.
Product Introduction:
Geotextile PP is a geosynthetic material made from polypropylene (PP). It is widely used in the engineering field due to its excellent properties.
Core Materials and Technology
Raw Materials: Polypropylene polymer is used, which has a low density (about 0.91g/cm³), strong chemical stability, and is resistant to corrosion by acids, alkalis, and salts.
Production Technology: It is made through processes such as needling, weaving, and hot rolling to form a sheet material with a porous structure. The pore size and porosity can be adjusted according to requirements.
Main Performance Advantages
Physical and Mechanical Properties
High tensile strength (up to 10 - 30kN/m), good flexibility, can adapt to soil deformation without damage; resistant to abrasion and tear, not easy to age after long - term use.
Lightweight (the mass per unit area is usually 100 - 800g/m²), convenient for transportation and construction laying.
Filtration and Drainage Functions
The porous structure can prevent the loss of soil particles while allowing water to penetrate, achieving the "filtration" effect (such as erosion protection of dams and roadbeds). It has a high drainage and seepage efficiency, accelerating the discharge of water in the soil mass.
Chemical and Environmental Adaptability
Anti-ultraviolet (after adding anti-aging additives), resistant to high and low temperatures (stable performance in the range of -30°C to 110°C), can be used in open-air or underground projects; resistant to microbial erosion, adaptable to complex environments such as swamps and landfills.
Product Parameters:
project | metric | |||||||||||||
| Nominal strength/(kN/m) | ||||||||||||||
| 35 | 50 | 65 | 80 | 100 | 120 | 140 | 160 | 180 | 200 | 250 | ||||
| 1 Tensile strength per (kN/m) ≥ | 35 | 50 | 65 | 80 | 100 | 120 | 140 | 160 | 180 | 200 | 250 | |||
| 2. Weft tensile strength / (kN/m) ≥ | After tensile strength is multiplied by 0.7 | |||||||||||||
| 3 | Maximum elongation at maximum load/% | warp direction ≤ | 35 | |||||||||||
| broadwise ≤ | 30 | |||||||||||||
| 4 | Top penetration force /kN is greater than or equal to | 2 | 4 | 6 | 8 | 10.5 | 13 | 15.5 | 18 | 20.5 | 23 | 28 | ||
| 5 | Equivalent aperture O90 (O95)/mm | 0.05~0.50 | ||||||||||||
| 6 | Vertical permeability coefficient/(cm/s) | K× (10⁵~102) where: K=1.0~9.9 | ||||||||||||
| 7 | Width deviation rate /% ≥ | -1 | ||||||||||||
| 8 | Tear strength in both directions /kN ≥ | 0.4 | 0.7 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 1.9 | 2.1 | 2.3 | 2.7 | ||
| 9 | Unit area mass deviation rate /% ≥ | -5 | ||||||||||||
| 10 | Length and width deviation rate/% | ±2 | ||||||||||||
| 11 | Joint/seam strength a/(kN/m) ≥ | Nominal strength x 0.5 | ||||||||||||
| 12 | Anti-acid and alkali properties (strong retention of warp and weft Rate) a /% ≥ | Polypropylene: 90; other fibers: 80 | ||||||||||||
| 13 | Ultraviolet resistance (Xenon arc lamp method) b | The strength retention rate in both directions is /%≥ | 90 | |||||||||||
| 14 | Ultraviolet resistance (fluorescencePhotometric ultraviolet lamp method) | The strength retention rate in both directions is /%≥ | 90 | |||||||||||
Product Applications:
Hydraulic Engineering
Dams and Cofferdams: Laid as an anti - filter layer on the water - facing side or the back - water slope of the dam to block the loss of soil particles and prevent seepage failures such as piping and soil - flowing; used for slope protection during cofferdam construction to accelerate drainage.
Reservoirs and Channels: Drain and conduct seepage for the reservoir dam foundation, prevent the scouring of the channel slopes (reduce soil erosion), and filter the bottom of the drainage ditch (avoid sediment blockage).
River Regulation: Laid on the riverbank slope for protection, fixing the soil and promoting vegetation growth. At the same time, it filters the impurities in the water flow to protect the river ecosystem.
Traffic Engineering
Roads and Railways: Laying at the bottom of the subgrade, separating the soil layer from the crushed stone base, preventing soil from surging up and causing road surface settlement;Filtering and draining under the railway ballast to avoid rainwater seeping in and softening the subgrade; Fixing the soil in slope greening, cooperating with grass seed sowing to prevent landslides.
Tunnels and Airports: Guiding and seeping water in the tunnel lining drainage system, strengthening and draining the foundation of the airport runway to improve the foundation stability.
Environmental Protection Engineering
Landfill: Laid at the bottom of the landfill area or the leachate collection layer, it filters the suspended solids in the leachate to prevent pipeline blockage; at the same time, it separates the garbage from the soil layer to reduce the spread of pollutants.
Sewage Treatment: In the sludge dewatering process, it serves as a filtration medium to assist in the discharge of water and improve the sludge drying efficiency; it is also used as the anti-seepage isolation layer of the sewage treatment tank (used in combination with geomembrane).
Industrial Waste Treatment: Laid at the bottom of the industrial waste slag yard, it filters the leaching water and prevents pollutants such as heavy metals from seeping into the ground, protecting the soil and groundwater.
Geotechnical Engineering
Foundation Treatment: When reinforcing soft soil foundations, it is laid in combination with geogrids to enhance the bearing capacity of the foundation and reduce settlement; for temporary drainage and protection of slopes during foundation pit excavation.
Retaining Walls and Slopes: Laid on the back of retaining walls to accelerate the drainage of soil behind the wall and reduce water pressure; in slope support, it fixes the topsoil to prevent landslides caused by rainwater erosion (especially suitable for the greening of rock slopes).
Mining Engineering: As an anti - filter layer in tailings dams (to prevent the loss of fine - grained tailings), for the filtration of the mine pit drainage system to reduce environmental pollution.
Agriculture and Ecological Engineering
Irrigated and Drainage Engineering: Laying of underground drainage ditches in farmland to remove excess water, prevent waterlogging; Salt drainage and filtration in the improvement of saline - alkali land to reduce soil salt content.
Soil and Water Conservation: Laying on terraced fields and orchard slopes to fix the soil and reduce rainwater scouring. Combining with vegetation planting to enhance the ecological restoration effect; Moisture - proof and drainage of greenhouse foundations.
Ecological Restoration: In river ecological revetment and wetland restoration projects, it serves as the vegetation growth base, promoting the soil - fixing of aquatic plant roots and filtering water impurities at the same time.
Applications in Special
Scenarios Military Engineering: Reinforcement and drainage of temporary roads and field airport foundations, with rapid construction to meet emergency needs.
Artificial Lake and Landscape Engineering: Drainage and filtration at the bottom of artificial lakes to prevent soil loss at the lake bottom; fixing soil in landscape slope greening to enhance aesthetics and safety.
Engineering in Frozen Ground Zones: Laid under the roadbed in cold regions to block water migration and reduce frost heave damage (models resistant to low temperatures need to be selected).
Polypropylene geotextiles, with the characteristics of "balanced performance, controllable cost, and efficient construction", have become one of the core materials for solving problems such as filtration, drainage, and reinforcement in modern civil engineering.
