Pavement semi-rigid base material freeze thawing test machine

Abstract

The invention discloses a pavement semi-rigid base material freeze thawing test machine. The test machine comprises a test piece box, a water circulation system, a controller, a refrigeration system and a computer; an evaporator is arranged on the sidewall of the test piece box; a condenser, a compressor and the evaporator are connected through a pipeline; a water inlet is arranged on the sidewall of the test piece box, and a water outlet is arranged at the bottom of the test piece box; a water tank is arranged under the test piece box; a heating pipe and a water tank temperature sensor are arranged on the water tank apart; the water inlet is connected with a tap water pipe, a water discharging valve and a water overflow opening are connected with a floor drain, and the evaporator refrigerates the test piece box in the refrigeration working process; circulation fans realize air convection in the box; water in the water tank is heated by the heating pipe after the refrigeration ends to form constant temperature water circulation; and a test piece is thawed in water. The test machine realizes full automation of pavement semi-rigid base material freeze thawing cycle test; freeze thawing parameters are autonomously set according to test needs, so the test machine is convenient and flexible; the test machine reduces labor and has high efficiency; the circulation fans are arranged to enhance air convection in order to make the temperature in the box rapidly and uniformly reach a preset temperature, so the test precision is high; and the freezing resistance data of a semi-rigid base material can be timely and accurately obtained, and the construction quality of a semi-rigid base in the northern region is improved.

Description

technical field [0001] The invention belongs to the technical field of pavement engineering and test measurement, and relates to a freeze-thaw test machine for pavement semi-rigid base material, which is especially suitable for anti-freeze test of pavement engineering semi-rigid base. Background technique [0002] Semi-rigid base materials are widely used in highway pavement engineering because of their strong integrity and high bearing capacity. However, the semi-rigid base also has the disadvantage of poor frost resistance, which is easy to be damaged by freezing and thawing. Therefore, for highway projects in cold regions, the frost resistance of semi-rigid base is an important performance index. [0003] The conventional antifreeze test method is to use a refrigerator or a freezer for the test, so that the freezing temperature specified in the test is often not reached or not stable, and even the specimen cannot be frozen through, and the accuracy of the test results is...

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a freeze-thaw test machine for pavement semi-rigid base material to solve the problems in the prior art that the freezing temperature cannot be reached or cannot be stabilized, the test piece cannot be frozen through, the test accuracy is low, time-consuming and labor-intensive, etc.

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