Observation method and test piece of basalt fiber in asphalt mixture

Abstract

The invention discloses an asphalt mixture basalt fiber observation method and a test piece, which can directly and accurately observe the dispersion and distribution state of the basalt fiber in the asphalt mixture. The method comprises the following steps: (10) preparation of a transparent mixture test piece: using transparent plastic material as an aggregate, replacing pitch with a transparent cementitious material, adding basalt fiber, and molding to obtain a standard Marshall test piece; (20) cutting the test piece : multiple parallel cuts perpendicular to the axial direction of the standard Marshall test piece, grinding and polishing the cut section to obtain a clear section image; (30) section analysis: establish a coordinate axis on the section image, and observe the basalt fiber on the section image Quantity, position, shape to analyze the distribution and orientation of basalt fibers. The observation test piece is formed by mixing and mixing artificial aggregate, transparent cementitious material and basalt fiber, forming, curing and demolding with a Marshall test piece model.

Description

technical field [0001] The invention belongs to the field of asphalt pavement materials, and in particular relates to a model design and preparation method of a transparent basalt fiber asphalt mixture. Background technique [0002] Basalt fiber has been generally recognized by the engineering community in improving the road performance of asphalt mixture and improving the quality of asphalt pavement. However, as a new fiber product, basalt fiber is still in the development and verification stage in the field of road engineering in my country. The technical standards of basalt fiber products for materials are not yet mature. In particular, there are few studies on the dispersion state and distribution morphology of fibers in asphalt mixtures, and there are no domestic research reports on evaluating the dispersion uniformity of basalt fibers. [0003] The dispersion of basalt fiber in asphalt mixture directly determines the road performance and pavement quality of basalt fibe...

AI Technical Summary

Problems solved by technology

Since the components of asphalt mixture, including aggregate and asphalt, are opaque materials, it is difficult to directly observe the dispersion state and distribution of dark brown basalt fibers in the mixture through existing means

[0004] Therefore, the problem existing in the prior art is: in the natural asphalt mixture, the dispersion state and distribution morphology of the basalt fiber are difficult to observe

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