Device for testing cohesiveness of asphalt binder

Abstract

The invention discloses a device for testing the cohesiveness of an asphalt binder. The device can test the cohesiveness exhibited by the tension and torsion damages of the asphalt binder at differenttemperatures, and includes a tension test part, an anti-torsion test part, an asphalt mold, a control area part and a structure supporting part. The tension test part is used to test the maximum tensile stress and the damage displacement of a test sample damaged by the tensile stress; the anti-torsion test part is used to fix the end portion of the asphalt mold, provide torsion mechanics and testthe maximum torque and the relative angular displacement of the asphalt sample when the sample is damaged by the torque; the asphalt mold is used to pour asphalt or the asphalt binder to obtain the mold shape and size cooling-molded sample; and the control area part is used to control and display the torque, the tensile stress, the relative displacement value and the change curve of correspondingindexes of the sample at the final damage; and the structure supporting part is used to provide a mechanical support for each structure part to ensure the integral stability.

Description

technical field [0001] The invention belongs to the technical field of asphalt detection equipment, and in particular relates to an asphalt binder cohesion performance test device, which can be used for selection of raw materials in design and construction, performance research and inspection, and verification and detection of asphalt mixture performance. Background technique [0002] In road engineering, the reasonable selection of raw materials and the quality of their performance are important parts to ensure the quality of the road. If the quality of the raw materials themselves is low, it will directly cause the performance of the asphalt mixture to fail to meet the requirements and cause road diseases. Asphalt pavement is an overall structure with a certain strength formed by asphalt mixture after rolling, and asphalt mixture is obtained by mixing asphalt and aggregate in a certain proportion, among which asphalt or asphalt and mineral powder are mixed. It plays the ro...

AI Technical Summary

Problems solved by technology

[0004] At present, the test and reflection of the cohesion performance of asphalt and asphalt binder usually adopts the measurement of force ductility, etc., but the test results are greatly affected by external conditions, and the failure form is complicated, which is quite different from the actual mixture failure form.

The indicators tested and evaluated through experiments cannot accurately reflect the actual performance status, which will affect the road quality and disease control

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