Asphalt material dynamic shear modulus low temperature test method

Abstract

The present invention discloses an asphalt material dynamic shear modulus low temperature test method, comprising following steps: a test mold is placed on a dynamic shear rheometer; S2. a liquid asphalt material is injected into a cavity of the test mold, and the test mold is removed after the liquid asphalt material solidifies; S3. dynamic shear modulus data is collected from the solidified asphalt material, and the dynamic shear modulus data includes a complex shear modulus, a phase angle, a storage shear modulus, and a loss shear modulus; S4. the dynamic shear modulus data is fitted to form a relational graph between the complex shear modulus and the phase angle, a relational graph between the storage shear modulus and the loss shear modulus, a complex shear modulus main curve, and a phase angle main curve. The asphalt material dynamic shear modulus low temperature test method can set a larger sample height to better measure rheological properties of different kinds of asphaltene materials under low temperature conditions while standardizing a sample preparation process.

Description

technical field [0001] The invention relates to the field of scientific experiments on road materials, in particular to a low-temperature test method for dynamic shear modulus of asphalt materials. Background technique [0002] Asphalt binder is one of the important factors affecting the performance of asphalt pavement, so accurate and comprehensive test results of asphalt binder performance are an important basis for the design and construction of asphalt pavement. In the current domestic and foreign standards, the evaluation of asphalt binder generally starts from three levels of high-temperature anti-rutting, medium-temperature anti-fatigue and low-temperature crack resistance, and is equipped with corresponding test instruments, calculation methods and evaluation indicators. At present, the two widely used test instruments are dynamic shear rheometer (DSR) and trabecular bending test (BBR), which can respectively measure the high temperature, medium and low temperature p...

AI Technical Summary

Problems solved by technology

Although the improved dynamic shear rheometer (DSR) can accurately measure the rheological properties of asphalt binder under low temperature conditions, and partially replace the beam bending test (BBR), the improved dynamic shear rheometer (DSR ), there are still the following deficiencies: in the existing technology, the specifications that can be tested for larger-sized asphalt material sample

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