geosynthetic clay liner (5000g /m2, 4000g /m2) - GCL 25

1. Environment friendly

It is raw and natural materials,;aging and corrosion seldom happen. It can keep its quality and then it does not cause any injuries and pollution for human and the environment. It is not only waterproof, but also has good ventilation performance. It can stick up for the exchange of the ecological environment. It is a pure natural, new, green waterproof material.

2. Permanent waterproof, excellent performance

Its waterproof properties are much more durable than that of the buildings. Sodium bentonite would transform to high density septum under hydro pressure. When The thickness is 3mm, the permeability is below a*10-11/sec(a=1~9), which equals to the density of 100 times of the clay with 30 mm thickness. Water retention performance is evident.

3. Easy to construct

Bentonite powder, nails and washers are enough for connection and fixation. Construction is not constrained by weather conditions and it could be taken under cold or wet conditions. Bentonite powder is spread on overlap point. When water comes, GCL would be overlapped automatically. It is so far the only material that starts the waterproof effect by water in the world. It is not necessary to take additional examination when the construction is completed. The repair works are easy in case of waterproof defects. Among the existing waterproof materials, GCLs construction period is the shortest and its operation is the easiest. It has an eminent effect on shortening the construction period as well as saving the cost.

4. Strong Self-Restore Capacity

The integration between waterproof material and its target enables GCL a 20~28 times swelling volume. Even if concrete structure trembles or subsides, the bentonite in GCL would restore the crack of 2mm or below on the concrete structure immediately. Even if the diameter of perforation reaches 30 mm, the restoration will be finished within 15 days completely.

Main item: 6000g/m2, 5500g/m2, 5000g/m2, 4000g/m2, 3500g/m2, 3000g/m2

Installation Methods:

Disposal of subgrades:

1.the subgrades must be tamped before paving the GCLs, the surface should be smooth. And it should not have the obvious hollow space.

2.the surface should be dry.

3.the minimum angle of land surface exposed to the sun should be more than 30cm.

4.the construction of GCLs should be begin until checking out the foundation

Preparation before paving the GCLs:

1.drawing the GCLs paving order

2.examining the GCLs appearance quality

3.the construction of GCLs should be processed under the weather with no rain and snow

GCLs paving :

1.when paving the GCLs, it can use the machine and also the manpower.

2.paving the GCLs according to the stated order and way.

3.paving the GCLs, seaming overlapping between mat and mat should be staggered.

4.there should not be sand and soil, hydrocele and so on impurity, to avoid affecting on the

overlappingquality.

5.to avoid the GCLs gliding, had best to fix it with nails when installing in vertical and

bevel. Such asdrawing

6.both sides of the GCLs are geotextile and woven geotextile, when paving, the geotextile

should be nextto the water

7.when paving, examine the GCLs appearance at any moment

Backfill :

1.GCLs(bentonite clay liner )paved must be backfilled on the day.

2.the sand or the sifted soil is the best choice, and the soil should not have impurity with

more than10mm.

3.the soil must be tamped every backfilling 50cm, and the degree of density should be more than

85%.

4.pay attention to the GCLs when tamping, it can not be damaged.

5.when backfilling in the planar surface, the thickness should be 30cm at least.