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LSY-21 Three-Group, Ten-Unit Concrete Rapid Freeze–Thaw Testing Machine (English Version)

This product employs the air-freezing–water‑thawing method. Before powering on the instrument, fill the water reservoir completely, place the test specimen in the chamber, and then switch on the unit and press the start button. The freeze–thaw machine automatically freezes the specimen in the chamber to the set temperature in ambient air, maintains it for a user‑adjustable duration, and subsequently injects water at the set temperature, holding it at that temperature for another adjustable period. Once the prescribed thawing time has elapsed, the machine automatically drains the water back into the reservoir, increments the cycle count by one, and automatically initiates the next freeze–thaw cycle.

Category:

Concrete Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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LSY-21 Three-Group, Ten-Unit Concrete Rapid Freeze–Thaw Testing Machine (English Version)

Description

Product Introduction:

This product employs the air-freezing–water-thawing method. Before powering on the instrument, fill the water reservoir completely, place the test specimen in the chamber, and then switch on the device and press the start button. The freeze–thaw machine automatically freezes the specimen in the chamber to the set temperature in ambient air, maintains it for a user‑adjustable duration, and subsequently injects water at the set temperature, holding it at that temperature for another adjustable period. Once the prescribed thawing time has elapsed, the machine automatically drains the water back into the reservoir, increments the cycle count by one, and automatically initiates the next freeze–thaw cycle.

Implementation Standard:

“Test Procedures for Hydraulic Concrete” SL/T 352, “Standard Test Methods for Long-Term Performance and Durability of Ordinary Concrete” GB/T 50082, “Standard Test Method for Rapid Freeze–Thaw Resistance of Concrete,” ASTM C666; moreover, this testing machine also complies with the requirements of the JTJ 53-94 standard.

Test Objective:

1. The experiment confirms the frost resistance grade of concrete.

2. Calculate and verify the concrete’s durability coefficient.

Technical Specifications:

Model:	LSY-21
Condenser cooling method	Air-cooled
Number of specimens	10 specimens (3 sets of test specimens, plus one additional central specimen)
Specimen dimensions	100×100×400; the temperature-sensing component has the same dimensions.
Freeze-thaw cycle period	2–4 hours; the melting time shall be no less than one-quarter of a freeze–thaw cycle.
End of freeze–thaw cycle: Time / Temperature at the specimen’s center	1.5–2.5 hours / −18±2℃ (adjustable)
Completion of melting: Time / Temperature at the specimen’s center	1.0–1.5 hours / 5±2℃ (adjustable)
Temperature measurement accuracy	0.1℃
Temperature-measuring test specimen	Temperature‑measurement test specimen standard sample (sold separately)
One core temperature sensor	Center temperature control: 5 to -18 ± 2°C
Antifreeze 5‑channel sensor	Antifreeze temperature control: -25 to 20°C Temperature control at the center of the freeze–thaw chamber and along any diagonal: the temperature difference within the chamber shall not exceed 2°C. Secondary over-temperature protection to prevent the coolant from overheating. The temperature difference between the center and the surface of the test specimen shall be less than 28°C.
Control method	Touchscreen controller control
Number of iterations	The standard is 300 cycles (configurable).
Specimen bucket dimensions	115115500
External dimensions (length × width × height)	1650×900×950
Freeze–thaw cycling medium	Antifreeze at -45°C
Freeze–thaw cycle medium charge amount	The liquid level is 5 mm above the test block.
Refrigeration compressor	Fully enclosed 3HP
Heating power	6kw
Maximum operating power	7.3kw
Power supply	Three-phase four-wire, 380 V, 50 Hz
Weight	Approximately 350 kg

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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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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-21 Three-Group, Ten-Unit Concrete Rapid Freeze–Thaw Testing Machine (English Version)

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