Preparation method of asphalt mixture sample ultrathin slice for microscopic observation

Abstract

The invention discloses a preparation method of an asphalt mixture ultrathin slice. The preparation method comprises the following steps: 1) an asphalt mixture sample is immersed in an uncured polyester material, and gaps of the asphalt mixture sample are filled with the polyester material under the vacuum negative pressure condition so as to obtain the asphalt mixture sample filled with the polyester material; 2) the polyester material in the asphalt mixture sample filled with the polyester material is cured, and the sample is cut into a slice of less than 8 mm thick, and one side of the slice is polished until thickness deviation is less than 0.05 mm so as to obtain an asphalt mixture slice; and 3) the asphalt mixture slice obtained from the Step 2) is washed and dried and a glass sheet is pasted on the polished surface of the slice by the use of resin, and the slice is cut and polished until thickness is no more than 0.03 mm so as to obtain the asphalt mixture ultrathin slice for optical microscopic observation. The preparation method of the asphalt mixture ultrathin slice can be used for preparation of a sample applicable to microscopic structure observation of an asphalt mixture. According to the invention, research precision is raised.

Description

Technical field [0001] The invention relates to a method for preparing super thin slices of asphalt mixture specimens that can be used for microscopic observation. Background technique [0002] After long-term service, asphalt pavement is prone to pavement diseases caused by material aging. If the asphalt pavement is aging to a certain degree or the early disease appears in the early stage of pre-maintenance treatment, it can effectively inhibit the accelerated development of the disease, protect the entire road surface and extend the service life. However, in the pre-maintenance process, after the regenerant is sprayed on the asphalt pavement, its diffusion, penetration and effect in the aging asphalt mixture are not clear. At present, the research on the diffusion of regenerating agent for pavement pre-maintenance in old asphalt, the commonly used techniques such as hydrogen nuclear magnetic resonance spectrum analysis, dynamic shear performance analysis and FTIR analysis are ...

AI Technical Summary

Problems solved by technology

The asphalt mixture specimen itself has a porous structure, and the objective existence of factors such as hard aggregates inside the mixture makes it possible to obtain only slices with a certain thickness (such as 10mm) by using traditional cutting and grinding methods, and cannot prepare Ultra-thin slices of asphalt mixture that are complete and without microcracks

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