A kind of asphalt aging simulation device

Abstract

The invention discloses an asphalt ageing simulation device. The asphalt ageing simulation device comprises a constant temperature cabinet, a bracket fixed on the bottom surface of the constant temperature cabinet, and a container fixed on the bracket and used for containing a cylindrical rock core, wherein the rock core is made of aggregate; asphalt is disposed between the container and the rock core; and the side surface of the constant temperature cabinet is provided with a rotation motor which is used for driving the cylindrical rock core to rotate around the own generatrix and thus to continuously contact the asphalt. Through the continuous contact reaction with the asphalt in the rotation process of the cylindrical rock core, the device disclosed by the invention can favorably simulate the adhesion between the asphalt and a mixture and the ageing effect of the asphalt, and can conveniently determine and evaluate performance indices of the aged asphalt; and the device is particularly suitable for evaluating the influences of various aggregate mineralogical characteristics on different asphalt ageing properties.

Description

technical field [0001] The invention belongs to the technical field of test instruments for asphalt samples, in particular to an asphalt aging simulation device. Background technique [0002] As the main cementing material of modern pavement, asphalt material can improve various performances of pavement. But its performance is affected by many factors, especially the aging of asphalt. Factors affecting asphalt aging include air oxidation, light oil volatilization, aggregate absorption and adsorption, etc. Aggregate is another important component of asphalt mixture, and its mineral properties are one of the key factors affecting asphalt aging. [0003] However, the existing indoor simulation method of asphalt aging considering the influence of aggregates (i.e. the mixture aging method) has great uncertainty, mainly because the influence of different aggregate gradation, porosity and other factors on the aging results cannot be eliminated. . In addition, when it is necessar...

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Problems solved by technology

[0003] However, the existing indoor simulation method of asphalt aging considering the influence of aggregates (i.e. the mixture aging method) has great uncertainty, mainly because the influence of different aggregate gradation, porosity and other factors on the aging results cannot be eliminated.

In addition, when it is necessary to test the road performance of the asphalt contained in the aged mixture, asphalt recycling is required, and the chemical extraction process in recycling not only destroys the original shape of the asphalt, but also causes secondary aging of the asphalt. The experimental results have a great influence, which is very easy to mislead the comparison of materials and subsequent engineering design

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