Clay Geosynthetic Barriers
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Clay Geosynthetic Barriers
We, Shanghai Yingfan Environmental Engineering Co., Ltd., is a clay geosynthetic barriers manufacturer in China. This product is also called “geosynthetic clay liner” (GCL), “clay blankets”, “bentonite blankets”, “bentonite mats”, “prefabricated bentonite clay blankets” , "geocomposite clay liner" and “clay geosynthetic barriers”, the final one currently favored by the International Organization for Standardization (ISO).
It is bentonite geo-synthetic waterproofing barrier that often replaces thick layers of expensive compacted clay.
It is sandwich-made of a non-woven geotextile, a natural sodic bentonite layer and a polypropylene woven sheet.
Due to the hydro-expansive characteristic of bentonite (Bentonite composed predominantly (>70%) of montmorillonite or other expansive clays) and the needle punching method of manufacture which gives the resulting composite material shear strength, a critical feature for installation on slopes, our clay geosynthetic barriers can be used in many erosion control requested civil engineering.
Its performance can meet or exceed GRI-GCL3 and our national standard JG/T193-2006.
| Differences between clay geosynthetic barriers and compacted clay liners (CCL) | ||
| Characteristic | Clay Geosynthetic Barriers | Compacted Clay Liners (CCL) |
| Material | Bentonite clay, adhesives, geotextiles | Native soils or blends of soil and bentonite clay |
| Construction | Factory manufactured and then installed in the field | Construction and/or amended in the field |
| Thickness | ~ 6 mm | 300 to 900 mm |
| Hydraulic conductivity of clay | 10−10 to 10−12 m/s | 10−9 to 10−10 m/s |
| Speed and ease of construction | Rapid, simple installation | Slow, delicate and complicated compaction works |
| Installed cost | $0.05 to $0.10 per m2 | Highly variable (estimated range $0.07 to $0.30 per m2) |
| Experience | Construction quality assurance and quality control are critical | Highly workforce dependent |
Application
Canals, storm water impoundments and wetlands
Secondary containment
Highway and civil
Landfill liners
Landfill caps
Mining
Ponds
The below is a tailing waste dam application example for our clay geosynthetic barrier products:
FAQ
Granular bentonite is a vital part of this geocomposite clay liner. Whether it is good quality will directly and greatly influence the usage effect of gcl. So our Yingfan company always carefully select the reliable supplier and control each batch of this goods. We warmly welcome you to contact us for more details for this product.
| Test Item | Test Methods | Criteria |
| Bentonite swell index | ASTM D 5890 | ≥24ml/2g |
| Bentonite Fluid loss | ASTM D 5891 | ≤18ml |
| Bentonite Mass /unit area | ASTM D 5993 | ≥3.7kg/㎡ |
| Geotextiles-cap fabric nonwoven, mass/unit area | ASTM D5261 | ≥220g/m2 |
| Geotextiles-carrier fabric woven, mass/unit area, mass/unit area | ASTM D5261 | ≥110g/m2 |
| GCL tensile strength | ASTM D 6768 | ≥4.0KN/m |
| Mass of GCL | ASTM D5993 | ≥4000g/m2 |
| Peel strength | ASTM D 6496 | ≥360N/m |
| Index flux | ASTM D 5887 | ≤1×10-8m3/ sec-㎡ |
| Permeability | ASTM D 5887 | ≤5×10-11cm/sec |
| Geotextile and reinforcing yarns (% strength retained) |
ASTM D 5721 ASTM D6768 |
65 |
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