Mastic asphalt tensile test platform capable of eliminating eccentric bending moment and test method thereof

Abstract

The invention relates to a mastic asphalt tensile test platform capable of eliminating eccentric bending moment and a test method thereof. The test platform comprises a test support, an electromagnetic type dynamic mechanical test system and a stretching apparatus; the stretching apparatus comprises a first universal joint, a second universal joint as well as an upper puller and a lower puller for connecting a test piece, and the upper end of the upper puller and the lower end of the first universal joint are connected, and the upper end of the first universal joint and a first holder are connected; the lower end of the lower puller and the upper end of a second universal joint are connected, and the lower end of the second universal joint and a second holder are connected. The characteristic that rotation at three freedom degrees of the universal joints is allowed is utilized, all eccentric bending moments in three dimensions due to misalignment of an axis of the mastic asphalt test piece as well as an axis between the upper puller and the lower puller in the bonding process of the mastic asphalt test piece are effectively eliminated, and success rate of tests as well as precision and reliability of test results are furthermore improved.

Description

technical field [0001] The invention relates to the field of tensile tests of asphalt mastic, in particular to an asphalt mastic tensile test platform capable of eliminating eccentric bending moments and a test method thereof. Background technique [0002] Asphalt mixture is a typical multi-phase heterogeneous body. In mesomechanical analysis, asphalt mixture is often simplified into three parts: void, asphalt mastic and aggregate. Among them, asphalt mastic is a typical viscoelastic material, which greatly affects the mechanical properties of the asphalt mixture. The viscoelastic properties of asphalt mastic are the basis of the material performance analysis of asphalt mixture, and the study of viscoelastic properties of asphalt mastic is one of the important ways to analyze the asphalt mixture under the action of traffic load and natural factors. During long-term use, asphalt pavement receives a relatively stable load, and its deformation form is similar to the creep beha...

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Problems solved by technology

[0005] Aiming at the technical problem in the prior art that the eccentric bending moment of the asphalt mastic specimen cannot be eliminated when performing a tensile test on the asphalt mastic specimen, the present invention provides a method for performing a tensile test on the asphalt mastic specimen Test platform and its test method that can eliminate all eccentric bending moments in the three-dimensional space of asphalt mortar specimens

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