The KDR-V3, KDR-V5, and KDR-V9 concrete rapid freeze-thaw test machines are designed to meet the rigorous requirements of various national and international standards, including DL/T5150-2001, GBJ82-85, ASTM/C666, GB/T50082-2009, JGJ/T193-2009, and JTJ53-94. These machines are specifically developed for testing the frost resistance of concrete specimens with dimensions of 100×100×400 mm. They utilize a water-freezing and water-melting method, ensuring accurate and consistent results throughout the freeze-thaw cycle.
Each model offers different sample capacities, with the KDR-V3 supporting up to 10 pieces, the KDR-V5 up to 16 pieces, and the KDR-V9 up to 28 pieces. The KDR-V9 is particularly suitable for larger-scale testing, allowing one central specimen along with multiple others in a single test run. The machines are equipped with intelligent thermal storage technology, which enhances energy efficiency, reduces noise levels (below 60 dB), and ensures stable operation even under varying ambient conditions.
Key technical parameters include a temperature range from -25°C to 25°C, with a uniformity of less than 2°C between points. The measurement accuracy is ±0.5°C, and the display resolution is 0.06°C. The freezing and thawing cycles can be adjusted, with freezing times ranging from 2.5 to 4 hours, and melting times not less than 1/4 of the total cycle. The test piece reaches -17±2°C at the end of freezing and 8±2°C at the end of melting. The temperature difference between the center and surface of the specimen remains below 28°C, and the machine can perform over 300 cycles.
These machines are ideal for small testing laboratories, research institutions, and on-site inspections due to their compact design, ease of use, and high performance. The KDR-V9 model features a fully automated system, which allows for unattended operation, automatic stopping after the set number of cycles, and real-time alerts when the test is complete.
Equipped with a microcomputer control system, these machines offer advanced data management, including large-capacity storage, real-time data visualization, and the ability to export reports in Excel format. A comprehensive protection system ensures safety during operation, covering power phase loss, voltage fluctuations, and refrigerant pressure issues.
In addition to the core components, the KDR-V9 includes optional accessories such as a waterproof outdoor unit, an indoor test chamber, a control box, temperature sensors, and antifreeze. These features make the machines highly versatile and adaptable to different testing environments.
Overall, the KDR series of concrete rapid freeze-thaw test machines are reliable, efficient, and compliant with the latest industry standards, making them an essential tool for any concrete testing facility.
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