Do you know what material the water storage and drainage board is made of

　Water storage and drainage board Is a high-density polyethylene ( HDPE） Or polypropylene ( PP） The invention is a light board material formed by heating, pressurizing and shaping, which can not only create a drainage channel with a certain plane space supporting rigidity, but also can store water. The board itself has two comprehensive functions of water storage and drainage.

　　The plate has the characteristics of extremely high space stiffness, and its compression resistance is obviously better than similar products (can be tested by field experiments), and can accept 400 Kpa The above high compressive load resistance, and at the same time, it can accept the extreme load conditions of mechanical rolling in the process of planting roof backfill. It has the functions of building drainage in the layer, discharging soaked water in the soil, and storing local soaked water. Compared with the previous generation of drainage products, it has the following advantages and disadvantages.

　　Drought and little rain in the north, storage Drainage plate It can store water and is also conducive to the growth of vegetation; The side wall of the bump point of the storage and drainage board is thick, so the compressive strength is large, which can reach 40 T The above is far larger than plastic tabs (high-density polyethylene drainage board, high-impact polystyrene drainage board), plastic drainage net mat and the same products (which can practice rolling experiments), and can meet the construction requirements and normal operation requirements of backfilling soil.

　　The supporting surface of the water storage and drainage board is relatively large, and the drainage channel will not be blocked due to the subsidence of the overlying non-woven fabric, and the drainage channel will not be blocked due to the entry of soil due to the lack of tearing of the tensile force of the non-woven fabric. The water storage and drainage board can perfectly preserve the drainage space, completely prevent the occurrence of poor drainage caused by the subsidence of the non-woven fabric, and will never cause vegetation to wither or die.