TDR-Ⅱ型混凝土快速冻融试验机-10件

TDR-Ⅱ Concrete rapid freeze-thaw testing machine -10 pieces

Introduction:

This equipment is designed and manufactured in accordance with the requirements of the "Rapid Freezing Method" in the national power industry standard DL/T5150-2001 "Hydraulic Concrete Testing Regulations", the "Rapid Freezing Method" in GBT50082-2009 "Rapid Freezing and Thawing Performance and Durability Test Method for Ordinary Concrete", and the "Standard Test Method for Rapid Freezing and Thawing Ability of Concrete" in the United States ASTM/C666. It can meet the requirements of design, research, and construction departments in various domestic industries for rapid frost resistance testing equipment for concrete.

This device is suitable for concrete frost resistance tests using dynamic elastic modulus, weight loss, and relative durability index as evaluation indicators. The purpose is to determine the frost resistance grade of concrete by measuring its resistance to repeated actions of water and negative temperature, and to conduct a professional rapid freeze-thaw test. The equipment adopts the water freezing and thawing method, where standard concrete specimens are placed in rubber barrels and soaked in water. Then, the rubber barrels containing the specimens and water are arranged in the test box, and the refrigerant is used as the circulating medium to periodically freeze and dissolve the water layer around the specimens.

Main technical indicators and parameters

1. Sample size: 100 × one hundred × four hundred

The size of the temperature measuring specimen is the same, with a temperature measuring hole left in the middle.

2. The central temperature of the specimen at the end of freezing- 18 ° C ± 2 ° C

3. The central temperature of the specimen at the end of melting+ 7 ° C ± 2 ° C

The test temperature can be set according to the user's requirements for the center temperature of the specimen and the temperature of the freeze-thaw medium. The temperature control accuracy is ± 2.0 ° C.

4. Freezing and thawing cycle: Each freezing and thawing cycle lasts for 2-4 hours, and the time used for melting is not less than 1/4 of the entire freezing and thawing cycle.

5. Number of test pieces: 10, one of which is used for temperature measurement

6. Overall dimensions:

1650mm long, 900mm wide, and 880mm high

The main functions of this system include: displaying and recording the central temperature of the specimen and the temperature of the circulating liquid; Conversion of freeze-thaw process and temperature control of circulating liquid; Control the number of freeze-thaw cycles; Compressor exhaust pressure, suction pressure, and motor unit temperature rise protection; Circulating liquid flow protection and overtemperature protection; Motor overload protection, etc. In abnormal situations such as power and water outages, the machine can automatically stop running.

The entire freeze-thaw test process is fully automatic, and in case of a malfunction, a photoelectric alarm is given and corresponding protection measures are taken by oneself.

7. Unit power supply: three-phase four wire system 380V 50HZ

8. Refrigeration power: 2.6KW (3 low-temperature compressors)

9. Heating power: 9KW

10. Circulating pump power: 0.3WK

11. Maximum operating power of the unit: 10KW

12. Freezing and thawing circulation medium: -45 ° C, antifreeze, injection volume: 36 kilograms (2 barrels of antifreeze)