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LQH-10 Full-Graded Concrete Permeability Coefficient Tester

Name: LQH-10 Full-Graded Concrete Permeability Coefficient Tester
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

This instrument was developed and designed in accordance with the national standard SL 352-2006, “Test Procedures for Hydraulic Concrete,” specifically for determining the permeability coefficient of concrete. It features stable performance, user-friendly operation, an automatic water‑supply system powered by a pressure pump, and automated calculation of test data.

Category:

Asphalt Concrete Testing Equipment

Keywords:

E-mail:

lbt@lbt.ltd

WhatsApp:

+86-15102211717

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LQH-10 Full-Graded Concrete Permeability Coefficient Tester

Description

Product Introduction:

Technical Specifications:

Parameter item	Parameter Description
Accuracy	0.5%
Pressure range	0.1-10MPa
Specimen dimensions	Standard configuration includes a φ300×300 mm mold for 3 stations (a φ450×450 mm mold is available upon request).
External dimensions	970×620×1000mm 850×600×1180mm
Voltage	380V
Overall machine weight	150Kg

Procedure:

Fabricate and cure specimens in accordance with the specifications for fully graded concrete.

1. Place the specimen in the test container lined with a permeable plate, and fill the space between the specimen and the mold wall with an impermeable material (for low-temperature tests, the steel mold should be preheated). Fill the lower two-thirds with hot asphalt at a temperature exceeding 80°C, and the upper one-third with a highly flexible joint‑filling material. It is advisable to add 5%–10% diesel fuel to the asphalt to reduce its hardness.

2. After the sealing material has cooled, place the test specimen and the container into the steel support frame, position the sealing ring on the top surface of the container, and tighten the lid bolts.

3. Connect the water supply and pressure source hoses to the specimen chamber, open the inlet valve to fill the upper portion of the specimen chamber with water, and close the vent valve after all air has been expelled. Then, turn on the pressure source, adjust the pressure to maintain a constant value, ensuring that the pressure fluctuation remains within ±0.1 MPa.

4. When the concrete compressive strength is below 30 MPa, the test pressure may be initiated at 0.2 MPa. Under constant pressure, increment the pressure by 0.1 MPa every 8 hours until all three specimens exhibit water leakage at their bases. Maintain the final pressure level and proceed with the permeability coefficient test: install the lower sealing cap, connect the collection bottle, and record the water volume in the bottle every 8 hours until the measured seepage volumes over successive intervals become essentially consistent.

5. When the compressive strength of concrete exceeds 30 MPa, the test pressure may be initiated at 0.5–1.0 MPa. Under constant pressure, increase the pressure by 0.4 MPa every 8 hours until water leakage occurs in three specimens.

Record the volume of water discharged, and plot the cumulative discharge versus time on a Cartesian graph. When the curve becomes a straight line, it indicates that the flow rate has stabilized, and the experiment may be terminated.

6. After the test is completed, remove the specimen container from the test unit, heat to soften the asphalt sealing material, and extract the specimen.

The permeability coefficient test for fully graded concrete has been completed. Open the pressure‑relief valve of the high-pressure chamber, clean the instrument’s exterior, close the lid of the standard test chamber, and thoroughly dry and lubricate the base of the high-pressure chamber with anti‑rust grease. If the equipment will remain idle for an extended period, open the drain valve located at the lower right side of the main unit to completely empty the system, thereby preventing freeze‑induced cracking.

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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

Which materials can be measured by your Vicat softening point tester?

It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

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.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

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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.”

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

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“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.”

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

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.”

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