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Waterproof drainage board | ||||||||
Item | Index | |||||||
Tensile force at 10% elongation (N/100 mm) | 350 | |||||||
Maximum tensile force (N/100 mm) | 600 | |||||||
Medium elongation at break % | 25 | |||||||
Tearing performance N | 100 | |||||||
Compression | Maximum strength at 20% compression k/Pa | 150 | ||||||
Extreme compression | No cracking | |||||||
Low tenderness | -10°C No cracking | |||||||
Heat aging | Tensile strength retention at 10% elongation % ≥ | 80 | ||||||
Maximum tensile strength retention % ≥ | 90 | |||||||
Retention rate at break % ≥ | 70 | |||||||
Maximum strength retention at 20% compression rate % ≥ | 90 | |||||||
Extreme compression phenomenon | No cracking | |||||||
Low tenderness | -10°C No cracking | |||||||
Longitudinal flux (lateral pressure150 kPa)(cm³/s) ≥ | 10 | |||||||
Resist long-term high pressure
1.The construction of the roof or garage roof should be carried out on the basis of a waterproof layer, with a slope of 2 ‰ -5% ‰, and the entire area should be kept free from water accumulation and flow. | ||
2.The drainage board should be laid along the edge of the top plate along the slope, with a uniform laying direction. The edges of the drainage board should be overlapped by 2-4cm and welded together. The drainage board should be covered with a layer of geotextile, and the geotextile should be covered with another layer of geotextile. The geotextile should overlap with the edge of the geotextile by 10cm to prevent soil from flowing into the gaps of the drainage board and maintain smooth drainage. | ||
3.A fully loaded labor vehicle cannot walk directly on the drainage board, and wooden boards can be laid to form a passage to prevent damage to the drainage board. | ||
4. Backfilling soil should be done in a timely manner to avoid damage to drainage boards and geotextiles caused by other types of work on site. It is best to fill the soil as it is laid. | ||
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