Asphalt mixture viscoelastic property test method based on wheel load instrument

Abstract

The invention relates to an asphalt mixture viscoelastic property test method based on a wheel load instrument. In the method, the wheel load instrument, a test piece, a dynamic modulus test and a creep test are provided. The method comprises the following steps: a, before the test, assembling a strain sensor at the bottom of an asphalt mixture test piece and calculating by a mechanical method or a finite element analysis method to obtain the stress distribution condition of the test piece under the action of moveable load according to moving wheel load features and the test piece size; b, during the test, employing the modulus test and the creep test: measuring the tensile deformation strain capacity of the test piece by using the strain sensor, and measuring the tensile deformation strain capacity of the test piece through the strain sensor; and c, after the test, obtaining the stress and the strain capacity of the test piece and the action time of the wheel load by the wheel load instrument and the strain sensor. The method has the characteristics of simplicity, practicability, high operability and high applicability. According to the method, the stress characteristic of the test piece during the test is similar to the actual asphalt concrete road surface, and the viscoelastic property obtained by the test is accurate and reliable.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a test method for the viscoelasticity performance of asphalt mixture based on a wheel load meter, which is used for testing the viscoelasticity performance of asphalt mixture. Background technique [0002] In recent years, the vigorous development of highway traffic, especially the construction of high-grade highways, has put forward higher requirements for the quality and function of road materials. The performance, quality and composition design of road materials play a vital role in its development, and testing and understanding the performance of road materials through reasonable test methods is the premise and basis for the correct and effective use of road materials. Due to its many advantages, asphalt concrete pavement has been widely used in road engineering construction. The current high-grade roads in our country basically use asphalt concrete pavement. [0...

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