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LSY-25 Concrete Specimen Internal and External Stainless Steel Rapid Freeze–Thaw Testing Machine

The frost resistance of concrete specimens is determined under water–freeze–thaw conditions and expressed in terms of the number of rapid freeze–thaw cycles they can withstand.

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Concrete Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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LSY-25 Concrete Specimen Internal and External Stainless Steel Rapid Freeze–Thaw Testing Machine

Description

Product Introduction:

The frost resistance of concrete specimens is determined under water‑freeze–water‑thaw conditions and expressed in terms of the number of rapid freeze–thaw cycles they can withstand. This parameter is used to classify the concrete’s frost resistance grade and to calculate its durability coefficient.

Product Features:

1. This freeze–thaw apparatus features a split‑type design, with both the indoor and outdoor units connected via piping and electrical wiring, all utilizing quick‑connect fittings to facilitate assembly, relocation, and transportation.

2. The equipment’s refrigeration, heating, and circulation pumps are all housed in the outdoor unit, ensuring quiet operation indoors.

3. The equipment control system supports remote upgrades.

4. The equipment control system features phase-sequence protection, overpressure protection, overload protection, automatic alarm for refrigeration abnormalities, and automatic alarm for heating abnormalities.

5. The equipment is controlled via a touch screen and features animated visualizations, enabling customers to easily monitor its operating status.

6. Equipped with an automatic filtration system to prevent impurities from entering the circulation system and compromising equipment performance.

7. The refrigeration system uses exclusively imported components.

8. Both the indoor and outdoor units are made of high-quality stainless steel.

Technical Specifications:

Project	Details
Condenser cooling method	Air-cooled
Specimen dimensions	100×100×400; the dimensions of the test specimens are identical, and a temperature-measurement hole is provided in the central specimen.
Freeze-thaw cycle period	2.5–4 hours; the melting time shall be no less than one-quarter of a freeze–thaw cycle.
Specimen Cooling Requirements	The time required to cool from 3°C to -16°C shall be no less than half of the freezing time.
Specimen Heating Requirements	The time required to raise the temperature from −16°C to 3°C shall be no less than one-half of the total melting time.
Freezing Time/Temperature	1.5–2.5 hours / -18±2℃ (adjustable)
Melting time/temperature	1.0–1.5 hours / 5 ± 2°C
Core temperature sensor control	The specimen’s core temperature is maintained at 5 to –18 ± 2°C.
Box temperature sensor control	The cooling and heating capacities are dynamically adjusted in stages according to the freeze–thaw status and the circulating fluid temperature, enabling smooth, energy-efficient operation.
Diagonal temperature control	The temperature variation within the monitoring enclosure shall not exceed 2°C.
Secondary protection temperature control	50℃~-30℃
Temperature difference between the specimen center and surface	Less than 28°C
Refrigeration compressor	Danfoss Fully Enclosed 6P
Temperature sensor	Japan’s Omron high-precision sensor, with an accuracy of 0.05°C.
Control system	Taiwan FATEK Programmable Controller
Heating power	7kw
Maximum operating power	7.7kw
Studio dimensions (length × width × height)	1150×800×600mm
External Dimensions – Indoor Unit	1600x900x800mm
External Dimensions – Outdoor Unit	1100x900x800mm
Overall machine weight	700kg
Power supply	380V

Related Product

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The HC-40 concrete multi-functional strength tester is a high-performance testing device integrating multiple advanced technologies, specifically designed for evaluating the strength and quality of concrete.

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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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.

Customer Reviews

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.”

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.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

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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LSY-25 Concrete Specimen Internal and External Stainless Steel Rapid Freeze–Thaw Testing Machine

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