Water permeability substrate material specifications
The material of the water-permeable base layer is mainly gravel, which is selected by the conditions of the angularity, interpenetration, and hardness of the gravel.
Crushed stone materials should be made of tough, wear-resistant broken granite or limestone; do not mix different soft and hard stones.
The gravel material should be a multi-cornered block, clean and soil-free, stone-free and weathering-free stone.
Gravel material should meet the following conditions.
The compressive strength should not be less than 80MPa;
The content of soft particles should be less than 5%;
Mud content should be less than 2%;
Flat and slender (1:2) gravel content should be less than 20%;
Gravel rules are 30~70mm and caulking material specifications are 15~25mm. The amount of gravel used is shown in Table 1 below. The composition of gravel particles is shown in Table II.
Crushed stone specifications and consumption table 1
Gravel thickness (cm) | Crushed stone specifications (cm) | Caulking amount (m3/100m2) | |
1.5~2.5cm | 1.0~1.5cm | ||
8 | 3~6 | 1.6 | 1.2 |
10 | 4~7 | 2.5 | 1.6 |
Crushed stone composition table 2
Standard size (mm) | Percentage of mass passing through the following mesh (%) | |||||||
100 | 80 | 60 | 40 | 30 | 25 | 20 | 10 | |
40~80 | 100 | 90~100 | 25~60 | 0~15 | - | 0~5 | - | - |
30~60 | 100 | 90~100 | 25~50 | 0~15 | - | 0~5 | - | |
Cat Feather Toys,Feathers Cat Teaser Toy,Electric Cat Feather Toy,Pet Cat Toys
Ningbo Movepeak Pet Supplies Co.,LTD. , https://www.pet-supplies-factory.com