Overview
HZAOC DR-16A concrete quick freeze-thaw machine is a special equipment used to measure the frost resistance performance of concrete specimens under water freezing and thawing conditions. The equipment evaluates the frost resistance durability of concrete specimens by recording the number of rapid freeze-thaw cycles or calculating the frost resistance durability coefficient.
Features
1. The test chamber shell and Tank are made of stainless steel plate, and the insulation layer is polyurethane foam foamed as a whole, with strong structure and good thermal insulation performance.
2. Adopt imported fully enclosed refrigeration Compressors and high-quality refrigeration control components, valves and electrical components to ensure the stability and reliability of the system.
3. Equipped with a brand computer to run the freeze-thaw box Control system, you can arbitrarily set the number of cycles, core temperature alarm value and other parameters, automatically display the number of cycles completed, and view the historical Linear dispersion and reports.
4. Safety protection with multiple functions, including phase loss, short circuit, overload, overtemperature, overpressure, low refrigerant level or cut off, chilled down cycle water shortage, etc., to ensure the safe operation of equipment.
5. Adopt special pipe type stainless steel electric heating tube for direct heating, with high heating efficiency.
Principle
The equipment reduces the temperature of the refrigerant (-35 ° C antifreeze) through the refrigeration system, and drives the refrigerant in the domestic circulation of the specimen tank by the circulation pump, and periodically freezes and melts the concrete specimen soaked in it. The temperature measurement system monitors the center temperature of the specimen and the temperature of the refrigerant in real time. The Control system automatically controls the start and stop of the refrigeration and heating system according to the set temperature and time parameters, completes the freeze-thaw cycle process, and records the number of cycles.
Applications
Concrete frost resistance performance test
Standards
GB/T50082-2009、GB/T2542-2012、GB28635-2012、GB/T4111-2003、GB/T11968-2006、GB/T11973-2006、GB/T3810.12-2006、GB/T11969-2008、GB/T7019-2014
Steps
1. Put the concrete specimen into the specimen barrel and inject the specified amount of -45 ° C antifreeze.
2. Turn on the power supply and start the device.
3. Set the required number of freeze-thaw cycles, the upper and lower limit alarm values of the center temperature of the test piece and other parameters in the computer Control system.
4. Start the freeze-thaw cycle program, and the device will automatically perform the freezing and thawing process.
5. Monitor the running process, and the device will automatically record and display the number of cycles completed.
6. After the test reaches the set number of times or meets the termination conditions, stop the equipment and remove the specimen for subsequent evaluation.
Notice
• The power supply of the equipment is 3N380V 50HZ, and it is necessary to ensure that the power supply meets the requirements.
• Check the water circulation system and refrigerant level before operation to ensure normal operation.
• Pay attention to the operation status of the equipment, and if there is an alarm, it needs to be checked and dealt with in time.
• Regular maintenance to ensure the normal operation of refrigeration systems, circulating pumps and other components.
Operators should be familiar with the Equipment Control system and Safety protection functions.
