Concrete unilateral freeze thawing tester

Abstract

The invention discloses a concrete unilateral freeze thawing tester, comprising a test block tank, a radiating system, a control cabinet and insulating layers, wherein the insulating layers are arranged on peripheral wall of the test block tank and below the test block tank, foaming cotton is filled in the insulating layer, a refrigeration slot is horizontally arranged in the middle of the insulating layer below the test block tank; the bottom of one end of the refrigeration slot is connected with an input pipe, and the side of the other end is further connected with an output pipe, the input pipe is connected with the output pipe through a water pump; the bottom of the radiating system is provided with an electromagnetic valve group, the electromagnetic valve group comprises three parallel electromagnetic valves, the first end socket of the electromagnetic valve group is connected with the test block tank, and the second end socket is connected with the refrigeration slot; the test block tank can be pre-cooled through the refrigeration slot so as to reduce the temperature of the test block tank, and the cooling water in the refrigeration slot can be supplemented to the test block tank through the electromagnetic valve so as to balance the deviation between the target temperature and the actual temperature in the test block tank, and the temperature precision in the test block tank can be greatly improved.

Description

technical field [0001] The invention relates to a concrete unilateral freeze-thaw test machine. Background technique [0002] In order to test the anti-freeze performance of concrete specimens, it is necessary to simulate the temperature change of the natural environment and test the concrete specimens, which is called freeze-thaw test. If during the test, only one side of the concrete specimen is in contact with the freezing liquid, it is called a concrete unilateral freeze-thaw test. The freeze-thaw test consists of multiple freeze-thaw cycles. Freeze-thaw cycles are divided into various types according to different test requirements. A more typical one is to control the freeze-thaw cycle at 12 hours, which consists of a cooling phase (4 hours), a maintenance phase (3 hours), a heating phase (4 hours), and a maintenance phase (1 hour). The cooling stage requires time and temperature to change in a linear relationship, that is, within 4 hours, the temperature is uniforml...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a concrete unilateral freeze-thaw test machine, the purpose of which is mainly to solve the problem in the prior art that the difference between the target temperature in the test piece box and its actual temperature is relatively large, that is, the temperature accuracy in the test piece box is not high

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