The Sodium Bentonite GCL Permeability Tester is suitable for testing the hydraulic conductivity and seepage performance of sodium bentonite waterproof blankets and other geosynthetic clay liners. It can be used in laboratories, quality inspection institutions, research institutes, universities, and manufacturers of geosynthetic materials.

Sodium Bentonite GCL Permeability Tester

Model:TD-1208

I. Product Introduction

Designed in accordance with JG/T 193-2006, this tester is used to determine the hydraulic conductivity of sodium bentonite waterproof blankets (Geosynthetic Clay Liners, GCLs) under a specified hydraulic pressure differential. It measures the flow rate passing through the specimen over a specified period and the specimen thickness under the prescribed hydraulic gradient, and calculates the hydraulic conductivity accordingly.

Reference Standards: ASTM D6766-25, ASTM D5887/D5887M

II. Product Features

1. Equipped with a high-precision pressure control gauge for presetting the pressure in the permeation cell and upstream reservoir, with automatic pressure compensation and precise pressure control.

2. Equipped with transparent acrylic reservoirs featuring excellent airtightness for easy observation during testing.

3. Equipped with dedicated control valves to independently control air inlet, water inlet, and drainage for the permeation cell and the upstream and downstream reservoirs.

4. Uses pure copper fittings for durability and long service life.

5. Equipped with corresponding pressure control valves for convenient manual pressure adjustment for each specimen set.

6. Automatic water supply.

III. Technical Parameters

1. Sample Size: Ф70mm

2. Maximum Test Force: 100kPa

3. Overall Dimensions: 820x730x1850mm

4. Weight: 100kg

5. Inner Diameter of Upstream and Downstream Storage Tanks: 60mm

IV. Test Principle

The sodium bentonite GCL specimen is installed in the permeation cell and subjected to a specified hydraulic pressure differential. Water is allowed to flow through the specimen under controlled pressure conditions. The flow rate and specimen thickness are measured, and the hydraulic conductivity is calculated based on the measured data and the test conditions.

V. Testing Items

Hydraulic Conductivity of GCL;

Permeation Flow Rate;

Specimen Thickness;

Seepage Performance;

Water Permeability of Sodium Bentonite Waterproof Blankets.

VI. Key Advantages

1. Precise Pressure Control: High-precision pressure control components ensure stable and accurate test pressure.

2. Visual Observation: Transparent reservoirs allow convenient observation of water levels and test conditions.

3. Independent Control: Air inlet, water supply, and drainage can be controlled independently for flexible operation.

4. Automatic Water Supply: The automatic water supply system simplifies operation and improves testing efficiency.

5. Durable Construction: High-quality copper fittings and reliable control components provide long-term service life.

6. Laboratory Testing: Compact and practical design makes it suitable for routine laboratory testing and quality control.