Method, system and storage medium for evaluating medium temperature crack resistance performance of asphalt mixture

Abstract

The invention discloses a method, system and storage medium for evaluating the medium-temperature crack resistance performance of asphalt mixture, and relates to the technical field of road engineering. The specific steps of the present invention are as follows: the medium temperature splitting test is carried out on the test piece, and the splitting force, the vertical displacement of the loading indenter and the lateral deformation value of the test piece are synchronously recorded during the test; according to the splitting force, the loading indenter The vertical displacement of the test piece and the lateral deformation value of the test piece are used to calculate the splitting stiffness; in combination with the splitting stiffness, the dynamic curve of the splitting stiffness changing with time is obtained; the peak value of the dynamic curve is used as an index to evaluate the resistance of the test piece crack performance. The invention simultaneously considers the splitting force and lateral deformation characteristics in the material splitting test through the splitting stiffness index, and can more accurately evaluate the cracking resistance of the material at medium temperature.

Description

technical field [0001] The invention relates to the technical field of road engineering, and more particularly to a method, a system and a storage medium for evaluating the medium-temperature crack resistance performance of an asphalt mixture. Background technique [0002] The medium temperature crack resistance is one of the important performance indicators of asphalt mixture, which is of great significance for delaying the fatigue cracking of asphalt pavement and improving the service life of the pavement. In the process of asphalt mixture design or optimization, it is necessary to accurately evaluate the medium-temperature crack resistance performance to ensure that the designed and optimized mixture has good road service performance. [0003] The split test is a commonly used test method to evaluate the medium temperature crack resistance of asphalt mixtures. At this stage, there are many indicators to characterize the mid-temperature cracking performance of asphalt mix...

AI Technical Summary

Problems solved by technology

If the crack resistance of asphalt mixture is only evaluated by splitting strength or deformation parameters after strength failure, the influence of deformation characteristics of asphalt mixture before cracking is ignored, resulting in incomplete and objective evaluation results of crack resistance of the material.

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