Method and mold for preparing microscopic analysis sample of double-layer asphalt diffusion system

Abstract

The invention discloses a method and mold for preparing a microscopic analysis sample of a double-layer asphalt diffusion system. The method comprises the following steps: S1, respectively heating newasphalt and old asphalt to a flowing state, respectively injecting the processed new asphalt and old asphalt into an upper-layer mold and a lower-layer mold, and performing cooling to obtain an upper-layer sample and a lower-layer sample; S2, superposing and combining the upper-layer mold and the lower-layer mold to enable the upper-layer sample and the lower-layer sample to be in contact, and then performing heating to enable the upper-layer sample and the lower-layer sample to be fully diffused; S3, cooling and demolding the upper-layer mold and the lower-layer mold, placing a double-layeranalysis sample consisting of the upper-layer sample and the lower-layer sample on a glass slide, performing heating, taking out the product, cooling and storing the product; and S4, performing asphalt microscopic test observation on the cooled and stored double-layer analysis sample. With the method, a technical problem that the specification, the shape and the quality of an analysis sample cannot be controlled in the preparation and forming process is effectively solved, the use amount of asphalt can be effectively controlled, and the authenticity of subsequent asphalt and asphalt mixture material and mechanical property evaluation is improved.

Description

technical field [0001] The invention relates to the field of building material detection, in particular to a method and method for preparing a microscopic analysis sample of a double-layer asphalt diffusion system. Background technique [0002] In recent years, with the development of my country's highways, the road network has gradually improved, and a large number of asphalt pavements have greatly shortened their service life due to the problem of overloading and overloading. Due to the environmental benefits, economic benefits and use value produced by waste asphalt pavement (RAP), many scholars began to study the recycling of waste asphalt mixture, and the research and application of recycled asphalt mixture came into being. When recycling waste asphalt mixture, the diffusion of new asphalt in old asphalt cannot be ignored, and the real state of diffusion of new asphalt in old asphalt and the degree of mixing of the two directly affect the actual project. Performance of...

AI Technical Summary

Problems solved by technology

At present, the method of studying the mesoscopic observation of the double-layer asphalt diffusion system is mainly to heat the analysis sample to the molten state and drop it on the slide glass, then heat it until it disperses freely, and then cool it for later use; however, this method cannot fully guarantee the quality of the analysis sample. Evenly spread out, resulting in uneven surface of the analysis sample, and at the same time, it is difficult to control the amount of asphalt and it is easy to cause the difference in the thickness of the analysis sample

In response to this problem, the Chinese patent "CN104502168A" discloses a method for preparing asphalt microscopic analysis samples using silica gel molds. The analysis samples are directly added to the prepared single silica gel molds to ensure the uniformity of the analysis samples; Due to the inability to accurately control the amount of asphalt used in the mold, it will affect the subsequent microstructure analysis

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