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TSY-11 Geosynthetic Clogging Tester (Gradient Ratio Determiner)

This equipment is suitable for testing geosynthetic filter layers and has been developed and manufactured in accordance with standards such as JTG 3460‑2026 “Test Procedures for Geosynthetics in Highway Engineering,” SL 235, DL/T 5886, and others. It measures the hydraulic conductivity and permeability ratio of soil–geotextile systems and their interfaces under specified flow conditions, as well as determines the silt content of geotextiles, thereby assessing whether a geosynthetic used as a filter layer for a particular soil will cause unacceptable clogging.

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Geosynthetic Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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Description

TSY-11 Geosynthetic Clogging Tester (Gradient Ratio Determiner)

LBT-1145 Geosynthetic Clogging Tester (New Standard Gradient Ratio Measuring Instrument)

Product Introduction:

This equipment is suitable for testing geosynthetic filter layers and has been developed and manufactured in accordance with standards such as JTG 3460‑2026 “Test Procedures for Geosynthetics in Highway Engineering,” SL 235, DL/T 5886, and others. It measures the hydraulic conductivity and permeability ratio of soil–geotextile systems and their interfaces under specified flow conditions, as well as the silt content of geotextiles, thereby determining whether a geosynthetic used as a filter layer for a particular soil will cause unacceptable clogging. The permeability fixture features alloy components on both sides and an organic material in the center, providing excellent sealing performance and enabling quick and convenient sample installation and removal.

Technical Specifications:

Parameter Category	Parameter content
Inner diameter of the test cylinder	Φ100mm
Soil sample thickness	100mm
Screen mesh aperture	6mm
Piezometer scale division value	1mm
Temperature measurement range	5℃~50℃
Power supply	AC 220V 50Hz
External dimensions	800×700×2070(mm)
Overall machine weight	125kg

Test Procedure

1. Place the fabric specimen and the mesh screen together in the clamping device, and seal it securely.

2. Load the soil sample, ensuring a height of 100 mm. For loose soils, use a funnel to pour the air-dried soil into the permeameter and level it; for compacted soils, compact the sample in layers to achieve the specified density. During sampling, take care to prevent blockage of the pressure‑tube inlet.

3. Saturated soil sample: Water is introduced through the drainage tube, allowing it to flow slowly into the specimen from the bottom. The hydraulic head can be maintained at less than 25 mm until the water level rises to a specified height above the top of the soil sample. At that point, water may be added via the inlet pipe, and the entire container should be filled with water. To accelerate saturation, a vacuum pump or CO₂‑injection method may be employed.

4. Adjust the water level so that the hydraulic gradient i equals 1.0, and observe the changes in the water levels within the piezometers.

5. Once all piezometer readings have stabilized, maintain a constant head in the upstream inflow tank, open the outlet valve, and allow water to flow through the specimen under seepage conditions.

6. Measure and record the piezometer water level and seepage rate once per hour, while also noting the seepage duration and water temperature; continue measurements for 24 consecutive hours. If the readings have not yet reached full stability, extend the measurement period as needed until stability is achieved.

7. After completing the test at i = 1.0, adjust the hydraulic gradient i and conduct tests on the same specimen at i = 2.5, i = 4.0, and i = 10.0. Following each increase in i, allow the piezometer readings to stabilize, and maintain seepage under that gradient for at least 1.5 hours. Once i reaches 10.0 and the piezometer readings have stabilized, repeat steps 4.5–4.6.

8. Upon completion of the test, remove the geotextile specimen, brush off any surface soil, and after drying, weigh the geotextile together with the soil contained within, to an accuracy of 0.01 g.

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

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Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

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Customer Reviews

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From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

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From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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TSY-11 Geosynthetic Clogging Tester (Gradient Ratio Determiner)

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