A test device and method for torsion and shear performance of asphalt mixture

Abstract

The invention discloses a device and a method for testing the torsion resistance and the shear performance of a bituminous mixture. The device comprises a base, wherein a supporting frame is perpendicularly arranged on the base; a top plate parallel to the base is arranged on the supporting frame and can slide on the supporting frame; a force measurement device is arranged at the bottom of the top plate; a torsion measurement device is mounted at the bottom of the force measurement device; a horizontal connection rod is mounted at the bottom of the torsion measurement device through a torsion rotating shaft; a first control die is arranged on the horizontal connection rod; a second control die is arranged on the base below the horizontal connection rod; the first control die and the second control die are jointly used for fixing a test piece. A test performed by the device and the method shows that data results obtained by the test and a rule obtained by analysis both provide a strong basis for inspecting the performance of the mixture during design and construction of the mixture.

Description

technical field [0001] The invention relates to the technical field of performance research and inspection, structure verification and detection in the design and construction of asphalt mixture for road engineering, in particular to a device and method for testing the anti-torsion and shear performance of asphalt mixture. Background technique [0002] When designing asphalt pavement, the performance of the mixture is an important part of ensuring the quality of the road. Inaccurate mineral material grading, improper asphalt dosage, and low material quality will cause the performance of the asphalt mixture to fail to meet the requirements, which will directly lead to road failure. disease. In the actual design and construction testing, the evaluation of the performance of the mixture is not comprehensive, especially the test of the shear strength of the mixture does not match the actual working state of the road. In this case, the high-temperature performance, low-temperatu...

AI Technical Summary

Problems solved by technology

The triaxial compression test has the problem that the test equipment and operation are relatively complicated, and it is difficult to ensure that the stress state of the mixture is consistent with the actual stress state.

Even sometimes, it is obvious that the various properties of asphalt mixture meet the requirements of design and construction specifications, but the test of shear strength may not match the actual situation, resulting in early disease of the pavement

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