The tester determines the water permeability of geotextiles by measuring the volume of water passing vertically through the specimen under a specified constant hydraulic head. During the test, water is continuously supplied to maintain a stable hydraulic head difference across the specimen. The amount of water passing through the specimen within a specified period is measured and used to evaluate its water permeability characteristics.

Geosynthetic Horizontal Water Permeability Tester  

Model:TD1141-2

I. Product Introduction

The Geotextile Vertical Water Permeability Tester is designed to determine the vertical water permeability of various water-permeable geotextiles and composite geotextiles under a constant hydraulic head. The tester is designed and manufactured in accordance with JTG E50-2006, Test Methods of Geosynthetics for Highway Engineering, with reference to ISO 11058 and ASTM D4491/D4491M. It adopts a horizontal constant-head test configuration for accurate and reliable permeability testing.

II. Technical Specifications

1. Maximum Hydraulic Head Difference: 250 mmH₂O (2450 Pa)

2. Inner Diameter of Specimen Holder: Φ50 ± 0.5 mm

3. Maximum Specimen Thickness: 20 mm

4. Timer: 0–99.99 s

5. Thermometer Range: 0–50°C (Accuracy: 0.1°C)

6. Graduated Cylinder: 1000 mL (Accuracy: 10 mL)

7. Power Supply: AC 220 V ± 10%, 50 Hz

8. Overall Dimensions: 830 × 730 × 1830 mm

9. Weight: 95 kg

III. Instrument Features

1. Transparent Design: Allows easy observation of the testing process.

2. Wide Standard Compatibility: Complies with major domestic and international testing standards.

3. Box-Type Structure: Minimizes hydraulic head loss during testing.

4. Water Recycling System: Equipped with a water circulation system and a variable-frequency flow control system.

5. Two Specimen Holder Diameters: Available with 52 mm and 100 mm diameter specimen holders to better reduce specimen variability and ensure comparability with earlier testing equipment.

6. Customizable Specimen Holders: Specimen holders can be customized according to customer requirements.

IV. Applications

The Geosynthetic Horizontal Water Permeability Tester is suitable for testing various types of water-permeable geotextiles, composite geotextiles, and other geosynthetic materials. It can be widely used in:

Geotechnical engineering laboratories;

Highway and railway construction;

Landfill and drainage projects;

Water conservancy and hydraulic engineering;

Environmental engineering;

Scientific research institutes;

Quality inspection and material manufacturers.

V. Testing Advantages

1. Stable Hydraulic Head Control: The system helps maintain a relatively stable hydraulic head during testing, improving measurement consistency.

2. Easy Operation: The transparent structure makes it convenient for operators to monitor water flow and specimen conditions throughout the test.

3. Efficient Water Circulation: The built-in water recycling system reduces water consumption and facilitates continuous testing.

4. Reliable Test Results: The rigid test structure and controlled water flow help improve the repeatability and reliability of test results.

5. Flexible Configuration: Different specimen holders can be provided according to specimen dimensions and customer testing requirements.