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Sample preparation method of scanning electron microscope of basalt fiber and asphalt mixed material fracture

An asphalt mixture and basalt fiber technology, which is applied in the preparation of test samples and material analysis using measurement of secondary emissions, can solve the problem that the distribution of basalt fibers cannot comprehensively reflect the microstructural characteristics of the fracture surface, and the unfavorable scanning Surface electron microscope observation and comparative analysis, different sample sizes and shapes, etc., to achieve the effect of uniform size, regular shape and convenient operation

Inactive Publication Date: 2014-05-21
YANGZHOU UNIV
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Problems solved by technology

The samples selected by this method are not representative, and cannot fully reflect the microstructure characteristics of the entire fracture surface and the distribution of basalt fibers on the failure surface. At the same time, due to the randomness of sample selection, the size and shape of the sample Different, not conducive to the observation and comparative analysis of SEM

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  • Sample preparation method of scanning electron microscope of basalt fiber and asphalt mixed material fracture
  • Sample preparation method of scanning electron microscope of basalt fiber and asphalt mixed material fracture
  • Sample preparation method of scanning electron microscope of basalt fiber and asphalt mixed material fracture

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Embodiment Construction

[0028] (1) Marshall specimens of asphalt mixture mixed with basalt fiber were prepared by Marshall standard compaction method. The specimen was cylindrical, with a diameter of 101.6mm and a height of 63.5mm.

[0029] (2) Due to the large size of the Marshall specimen and the small size of the scanning electron microscope sample chamber, it is necessary to obtain a small-sized basalt fiber asphalt mixture sample first, and use a high-precision cutting instrument to cut the Marshall specimen into 5mm thick round flakes, such as figure 1 shown.

[0030] (3) Fine cutting: use a high-precision cutting instrument along the figure 1 Cut the asphalt mixture circular thin slice equidistantly in the direction of the middle dotted line, and then cut off the arc parts at both ends of the strip sample to obtain a basalt fiber asphalt mixture strip sample with a length of 30mm, a width of 12mm, and a height of 5mm. like figure 2 shown.

[0031] (4) Use a high-precision cutting instru...

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Abstract

The invention relates to a sample preparation method of a scanning electron microscope of a basalt fiber and asphalt mixed material fracture, which relates to the technical field of sample preparation of a material for testing of a scanning electron microscope. The method comprises the steps of first preparing an asphalt mixed material Marshall cylindrical test piece doped with basalt fibers by a Marshall standard compaction method, then cutting the cylindrical test piece to obtain bar-shaped test pieces, and cutting each of two opposite edges of each bar-shaped test piece of the mixed material along the height direction to form a small incision; performing water bath on the test pieces to achieve heat balance; and clamping two sides of the incisions of each test piece, fracturing the bar-shaped test piece of the mixed material and air-drying the fractured test piece. The obtained test piece fracture is relatively smooth, thus being favorable for the micro-observation on basalt fibers of the scanning electron microscope, so that the bonding situation between the basalt fibers and the asphalt mixed material and the reinforcement effect of the fibers during fracturing of the asphalt mixed material can be accurately mastered.

Description

technical field [0001] The invention relates to a sample preparation technology for materials used in scanning electron microscope tests, in particular to a sample preparation method for scanning electron microscope tests on fractures of basalt fiber asphalt mixtures. Background technique [0002] Basalt fiber is made of natural basalt formed by volcanic eruption as raw material, which is crushed and put into the melting furnace. After melting at 1450℃~1500℃, it is a continuous fiber formed by rapid drawing through a platinum-rhodium alloy wire drawing bushing. During the whole production process, there is no industrial waste water, waste gas and other industrial waste, and it is known as "the new material of the 21st century". Basalt fiber was developed by the Moscow Institute of Glass and Plastics in 1954, and industrialized production was realized in Ukraine in 1985. In 2002, basalt fiber technology was included in my country's 863 high-tech projects. In asphalt mixture,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N23/22
Inventor 肖鹏吴正光蒋德安吕阳
Owner YANGZHOU UNIV
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