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The composite waterproof and drainage board is composed of one or two layers of non-woven geotextile and a layer of three-dimensional synthetic geonet core. It has the comprehensive performance of "reverse filtration-drainage-breathability-protection". This structure makes the composite waterproof and drainage board perform well in various projects, especially in drainage projects such as railways, highways, tunnels, municipal projects, reservoirs, and slope protection.
Composite waterproof and drainage boards are widely used in a variety of engineering fields:
| Project | Index | |
|---|---|---|
| Tensile force at 10% elongation (N/100mm) | ≥350 | |
| Maximum tensile force (N/100mm) | ≥600 | |
| Elongation at break (%) | ≥25 | |
| Tearing property (N) | ≥100 | |
| Compression performance | Compression rate of 20% when the maximum strength (kpa) | ≥150 |
| limit compression phenomenon | No rupture | |
| Low temperature flexibility | -10℃ no rupture | |
| Heat aging (80℃ 168h) | Maximum tension retention rate (%) | ≥80 |
| Maximum tensile retention (%) | ≥90 | |
| breaking elongation retention (%) | ≥70 | |
| Maximum strength retention when compression ratio is 20% (%) | ≥90 | |
| limit compression phenomenon | No rupture | |
| Low temperature flexibility | -10℃ no rupture | |
| Longitudinal water permeability (pressure 150kpa) (cm3) | ≥10 | |
| Non-woven fabric | Quality per unit area (g/m2) | ≥200 |
| Transverse Tensile Strength (kN/m) | ≥6.0 | |
| Normal permeability coefficient (MPa) | ≥0.3 | |
