Vertical loading wheel tester for asphlat pavement

Abstract

The invention relates to a tester with annular track and loading wheel installed vertically for testing asphalt pavement. The tester includes cover plate installed on a bracket, panel, movement mechanism, stressing mechanism and constant temperature mechanism. Annular track wheel is adopted in the movement mechanism, and mixture sample of asphalt pavement is placed on the inner ring of the wheel that is positioned at plane perpendicular to the horizontal plane. The loading wheel is located on the lower half ring of the annular track wheel, being able to be rotated to the annular track wheel relatively. The loading wheel can be moved up and down for unloading or loading. When the testing carries on, the loading wheel, the annular track wheel and the mixture sample are in the constant temperature mechanism. The tester can do three tests: asphalt residual amount of asphalt pavement, tracking test and wear resistant property.

Description

technical field [0001] The invention belongs to the technical field of measuring force, stress and measuring by means of capacity, and in particular relates to the general measurement of force or stress through the permanent deformation of the measuring gauge, and a device requiring external operation in a repeated same operation. It is used to measure, separate and deliver a predetermined volume of fluid or flowing solid material from a source or container without weighing it. Background technique [0002] At present, the instrument used in domestic load wheel tests on asphalt pavements is the FLS-55 load wheel tester. After the motor is decelerated by the reducer, the rotary motion of the reducer is converted into a connecting rod through the crank linkage mechanism. It moves in a straight line, connected with the connecting rod is the test frame, rubber wheels are installed under the test frame, a load box is installed on the test frame, and load weights are installed in ...

AI Technical Summary

Problems solved by technology

The machine also has some shortcomings such as the test conditions at both ends and the middle are different, and the test data is inaccurate within a certain stroke of the test.

Another kind of asphalt pavement rutting test machine is a balance wheel structure with a constant temperature mechanism attached. When the wheel is loaded, it swings at a certain frequency and contacts with the asphalt mixture test sample. The pressure at the contact point is about 0.7MPa. The ruts are circular, which does not correspond to reality on the road

[0004] There is a circular runway rutting test machine in foreign countries without a temperature control mechanism. Under the condition of loading, the test machine performs uniform circular motion on a circular runway with a large radius. Due to the centrifugal force, the depth of ruts with different radii Not the same, this instrument can only do the turning rutting test of asphalt pavement mixture, not the rutting test of straight line motion

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