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KDR-V5 Concrete Rapid Freeze–Thaw Testing Machine

Name: KDR-V5 Concrete Rapid Freeze–Thaw Testing Machine
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

The KDR‑V5 concrete rapid freeze–thaw testing machine employs the water‑freeze/water‑thaw method and is designed to meet the dimensional requirements for 100×100×400 mm concrete specimens in freeze–thaw resistance tests. It can accommodate five test groups (16 specimens, including one central specimen) per cycle.

Category:

Concrete Testing Equipment

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E-mail:

lbt@lbt.ltd

WhatsApp:

+86-15102211717

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KDR-V5 Concrete Rapid Freeze–Thaw Testing Machine

Description

Product Introduction

The KDR‑V5 concrete rapid freeze–thaw testing machine employs the water‑freeze–water‑thaw method and is designed to conduct freeze–thaw resistance tests on concrete specimens measuring 100 × 100 × 400 mm. It can accommodate five sets of specimens (16 pieces, including one central specimen) per test cycle. During testing, the specimens are placed inside rubber sleeves filled with water, which are then positioned within a specimen chamber containing antifreeze solution. The unit’s refrigeration or heating system controls the temperature of the antifreeze, causing the specimens in the rubber sleeves to freeze and thaw, thereby completing the freeze–thaw cycle.

The equipment operates fully automatically throughout the entire cycle, requiring no manual intervention. Once the test reaches the preset number of cycles (default: 50), it shuts down automatically and emits an audible signal to indicate completion. If further testing is desired, the cycle count can be incremented and the operation resumed. The freeze–thaw cycle lasts 2.5 to 4 hours, with a thawing period of at least one quarter of the cycle. At the end of the freezing phase, the specimen’s core temperature is –18 ± 2°C; at the end of the thawing phase, the core temperature is 5 ± 2°C. The cooling time is 1.5 to 2.5 hours, and the heating time is 1.0 to 1.5 hours. The temperature difference between the specimen’s core and surface must be less than 28°C. The standard for the number of cycles is more than 300.

Implementation Standard:

GB/T 50081 “Standard for Test Methods of Mechanical Properties of Ordinary Concrete”

GB/T 50082 “Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete”

JGJ 55 “Code for Mix Proportion Design of Ordinary Concrete”

JTJ053 “Test Procedures for Cement Concrete in Highway Engineering”

JTGE 30 “Test Procedures for Cement and Cement Concrete in Highway Engineering”

National Electric Power Industry Standard DL/T 5150, “Test Procedures for Hydraulic Concrete”

SL352 “Test Procedures for Hydraulic Concrete”

JG/243 “Equipment for Freeze–Thaw Resistance Testing of Concrete”

JGJ/T 193 “Standard for Inspection and Evaluation of Concrete Durability”

ASTM C666, “Standard Test Method for Rapid Freeze–Thaw Resistance of Concrete”

Features:

1. The compressor has a low power rating and uses an imported 3‑phase refrigeration compressor. Whether installed indoors or outdoors, it operates quietly.

2. Heating is achieved without heating tubes, resulting in lower power consumption. Prolonged immersion of heating tubes in antifreeze can lead to electrical conductivity and other issues, thereby reducing the heater’s service life.

3. All-in-one unit; easy to move around the laboratory.

4. Environmentally friendly: low noise and energy-efficient. Compact design saves space.

Technical Specifications:

Parameter item	Value / Description
Device model	KDR-V5
Rated voltage	AC 380 V / 20 A, three-phase four-wire
Total machine power	3KW
Heating power	3KW
Refrigeration capacity	3KW
Measurement accuracy	±0.5℃
Display resolution	0.06℃
Maximum specimen capacity	5 groups + 1 central specimen (total of 16 specimens)
Temperature range	-25℃~25℃ (user-definable)
Temperature uniformity	Less than 2℃ between each point
Concrete specimen dimensions	100100400 mm
Rubber bucket dimensions	120120500 mm
Working dimensions	545545650（mm）
External dimensions	17008001000mm
Instrument weight	Approximately 200 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

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.

Customer Reviews

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.”

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.”

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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