Device and method for evaluating diffusivity of regenerant in aged asphalt

Abstract

The invention belongs to the technical field of environmental protection, and relates to a thermal regeneration technology of an asphalt material, in particular to a device and a method for evaluatingdiffusivity of a regenerant in aged asphalt by eliminating interface influence. In the prior art, after a regenerant and aged asphalt are naturally mixed and dissolved, an asphalt sample is sampled,the regenerant left on the interface of the asphalt and regenerant will influence the testing result severely. According to the technical scheme, the method sequentially comprises the following stepsthat a gasket is arranged on the upper portion of an asphalt sample containing device, and aged asphalt is poured into the asphalt sample containing device till the aged asphalt is flush with the upper surface of the gasket; a regenerant sample containing device is arranged at the upper part of the gasket, and a regenerant is added; high-temperature regeneration treatment is carried out on the aged asphalt added with the regenerant; after the regeneration treatment is finished, the regenerant is removed, and then the miscible substance of the asphalt and the regenerant at the corresponding part of the gasket is removed; an asphalt sample in the asphalt sample containing device is collected for performance test, so that the diffusivity of the regenerant in the aged asphalt is evaluated.

Description

technical field [0001] The invention belongs to the technical field of green environmental protection, and relates to a thermal regeneration technology of asphalt materials, in particular to a device and method for evaluating the diffusion ability of a regenerant in aged asphalt by eliminating the interface influence. Background technique [0002] By the end of 2018, my country's highway mileage has exceeded 4.8 million kilometers, and the total mileage of expressways has exceeded 140,000 kilometers. More than 90% of expressways use asphalt pavement. After a period of operation, the asphalt pavement will have cracks, cracks, potholes and other diseases. It needs to invest a huge amount of money in maintenance every year, and faces a heavy maintenance task. The traditional maintenance method is to mill the old pavement and then restore it with new asphalt mixture, which will produce a huge amount of old pavement material, and new stone and crude oil must be extracted at the s...

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Problems solved by technology

[0004] In view of the lack of test equipment and methods for evaluating the diffusion ability of regenerant in aged asphalt in the prior art, and when the asphalt sample is sampled after natural miscibility of regenerant and aged asphalt, the residual regeneration on the interface between asphalt and regenerant The problem that the regenerant will significantly affect the test results, the present invention provides a device and method for evaluating the diffusion ability of the regenerant in aged asphalt that can eliminate the influence of the interface. The diffusion ability of the regenerant in the aged asphalt, and at the same time eliminate the influence of the residual regenerated agent on the interface, and reflect the ability of the regenerated agent to restore the performance of the aged asphalt

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