Geotextile for Permeable Pavers
1. Soil retention and permeability: Prevent soil erosion while not affecting water seepage
2. Anti clogging and filtering: Filter out impurities to avoid clogging of permeable holes
3. Enhance strength: Disperse loads, reduce road deformation and damage
4. Weather resistant and durable: Resistant to corrosion and aging, suitable for outdoor environments
Product Introduction
1、 Basic attributes
Material properties: Geotextile for Permeable Pavers materials are mostly non-woven or woven fabrics made of polymer synthetic fibers (such as polypropylene and polyester), which have flexible properties and can fit the terrain of the paving base layer;
Physical properties: It has a porous structure with high porosity and uniform pore size, possessing both tensile strength and tear strength, and can adapt to slight deformation of road surfaces;
Chemical properties: Acid and alkali resistant, anti-aging, not easily eroded by corrosive substances in soil or rain, and strong chemical stability in outdoor environment.
2、 Core functions
Dual protection of permeability and soil retention: Retaining permeable channels to ensure rapid infiltration of rainwater, while intercepting soil particles to prevent the loss of base soil with seepage and avoid road settlement;
Filter and block to maintain permeability: Filter the sediment and debris carried by rainwater, prevent impurities from blocking the pores of permeable paving materials, and maintain long-term permeability efficiency;
Structural reinforcement prolongs service life: Disperses road load, reduces friction loss between permeable materials and base layers, enhances overall road tensile and deformation resistance, and reduces the risk of damage.
3、 Main features
Strong adaptability: Flexible materials can fit different levels of base smoothness, easy to cut and lay, suitable for various permeable paving scenarios (such as sidewalks and parking lots);
High durability: Resistant to UV rays, temperature and humidity changes, not easily degraded or damaged when exposed or buried in the base layer for a long time, with a service life that matches the permeable paving system;
Cost adaptation: It has multiple functions and does not require additional soil protection or filtering components. While ensuring performance, it reduces the overall material and construction costs of the project.
Product Parameters
project | metric | ||||||||||
Nominal strength/(kN/m) | |||||||||||
6 | 9 | 12 | 18 | 24 | 30 | 36 | 48 | 54 | |||
1 | Longitudinal and transverse tensile strength / (kN/m) ≥ | 6 | 9 | 12 | 18 | 24 | 30 | 36 | 48 | 54 | |
2 | Maximum elongation at maximum load in longitudinal and transverse directions/% | 30~80 | |||||||||
3 | CBR top penetration strength /kN ≥ | 0.9 | 1.6 | 1.9 | 2.9 | 3.9 | 5.3 | 6.4 | 7.9 | 8.5 | |
4 | Longitudinal and transverse tearing strength /kN | 0.15 | 0.22 | 0.29 | 0.43 | 0.57 | 0.71 | 0.83 | 1.1 | 1.25 | |
5 | Equivalent aperture O.90(O95)/mm | 0.05~0.30 | |||||||||
6 | Vertical permeability coefficient/(cm/s) | K× (10-¹~10-), where K=1.0~9.9 | |||||||||
7 | Width deviation rate /% ≥ | -0.5 | |||||||||
8 | Unit area mass deviation rate /% ≥ | -5 | |||||||||
9 | Thickness deviation rate /% ≥ | -10 | |||||||||
10 | Thickness coefficient of variation (CV)/% ≤ | 10 | |||||||||
11 | Dynamic perforation | Puncture hole diameter/mm ≤ | 37 | 33 | 27 | 20 | 17 | 14 | 11 | 9 | 7 |
12 | Longitudinal and transverse fracture strength (grab method)/kN ≥ | 0.3 | 0.5 | 0.7 | 1.1 | 1.4 | 1.9 | 2.4 | 3 | 3.5 | |
13 | Ultraviolet resistance (Xenon arc lamp method) | Longitudinal and transverse strength retention rate% ≥ | 70 | ||||||||
14 | Ultraviolet resistance (fluorescence UV lamp method) | Longitudinal and transverse strength retention rate% ≥ | 80 | ||||||||
Product Application
1. Municipal public areas
Pedestrian walkways and pedestrian streets: laid under permeable bricks/permeable concrete to intercept soil particles and prevent them from flowing away with rainwater, avoiding depressions and cracks in the road surface due to voids in the base layer; At the same time, filter out rainwater impurities to prevent pore blockage of permeable materials and ensure that pedestrians do not accumulate water during rainy days.
City squares and park trails: adapted to the light load requirements of leisure areas, they can maintain the long-term effectiveness of the permeable system, enhance the road surface's resistance to deformation, and cope with local pressure caused by pedestrian trampling.
2. Traffic assistance area
Parking lots (especially ecological parking lots): supporting moderate loads for vehicle movement, dispersing the compressive stress of tires on permeable substrates, and reducing road damage; At the same time, by using permeable soil protection, the soil structure below the parking lot is protected, and combined with materials such as grass bricks, the dual function of "parking+greening" is achieved.
Community roads and park branches: Suitable for low speed and low load scenarios in residential areas, solve the problem of water accumulation in rainy days in the community, and have strong weather resistance. Long term use does not require frequent maintenance, reducing property costs.
3. Sponge city related projects
Permeable paving rainwater infiltration system: As the "filtration support layer" of permeable paving, it connects the road surface with the underground infiltration system, ensuring rapid infiltration of rainwater while preventing sediment from entering the underground pipe network or infiltration pool, avoiding pipe network blockage and decreasing infiltration efficiency, and helping to achieve the goal of "infiltration and stagnation" in sponge cities.
4. Other special scenarios
Scenic area trails and camping ground: Suitable for outdoor natural environment needs, flexible materials can adapt to uneven terrain such as mountains and slopes, ensuring that rainwater infiltration does not erode the soil and reducing the damage of road construction to the ecological environment of the scenic area;
Light roads in industrial plant areas: For low-speed vehicles such as forklifts and trucks in the plant area, the anti tensile and anti wear capabilities of the permeable road surface are enhanced, and the water accumulation in the plant area is reduced through the permeable function, reducing the risk of slipping.
In summary, geotextile used for permeable paving materials is not a single functional material, but a key link that connects "pavement permeability efficiency, base structure stability, and long-term durability of the project". Whether it is pedestrian traffic protection in municipal livelihood scenarios, load adaptation in traffic assistance areas, or personalized adaptation for ecological needs and special scenarios in sponge city construction, it can provide bottom support for various types of permeable pavement projects through its core advantages of "permeability without blockage, soil protection without settlement, reinforcement and anti loss". It not only solves the problems of water accumulation and damage in practical use, but also reduces maintenance costs in the later stage. It is one of the important materials to promote the landing of permeable pavement technology and achieve a balance between ecology and practicality.
