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Distribution uniformity evaluation method of basalt fibers in asphalt mortar

A technology of basalt fiber and distribution uniformity, which is applied to the analysis of materials, material excitation analysis, preparation of test samples, etc. It can solve the problems of large dispersion of uniformity indicators, inability to evaluate fiber distribution, and difficulty in asphalt stripping.

Active Publication Date: 2021-06-22
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a method cannot evaluate the fiber distribution in the cut part, and it is difficult to completely peel off the asphalt from the fiber surface, resulting in a large dispersion of the uniformity index

Method used

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  • Distribution uniformity evaluation method of basalt fibers in asphalt mortar
  • Distribution uniformity evaluation method of basalt fibers in asphalt mortar
  • Distribution uniformity evaluation method of basalt fibers in asphalt mortar

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Experimental program
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Embodiment 1

[0042] refer to Figure 1 ~ Figure 3 , is the first embodiment of the present invention, and this embodiment provides a kind of distribution uniformity evaluation method of basalt fiber in asphalt mortar, comprises:

[0043] S1: Place the basalt fiber in a vacuum tank of a vacuum press, pour in the naphthalimide fluorescent agent until the naphthalimide fluorescent agent completely submerges the basalt fiber, and obtain the fluorescent fiber.

[0044] According to the fiber dyeing process, the air pressure of the vacuum press is set to 0.4MPa, and the pressurization time is 10min, so that the naphthalimide fluorescent agent can completely immerse the basalt fiber.

[0045] S2: Calculate the mix ratio of asphalt mortar according to the gradation type of asphalt mixture and the optimal asphalt ratio, and prepare basalt fiber asphalt mortar specimens by gyratory compactor according to the mix ratio of asphalt mortar and fluorescent fibers.

[0046] It should be noted that the gr...

Embodiment 2

[0078] In order to verify and explain the technical effect adopted in this method, this embodiment chooses the traditional technical scheme and adopts this method to conduct a comparative test, and compares the test results by means of scientific demonstration to verify the real effect of this method.

[0079] The traditional technical solution generally adopts to cut the test piece into small pieces, then wash off the asphalt with trichlorethylene, and then sieve to obtain fibers. This will bring two problems. One is that the asphalt cannot be completely washed away, resulting in quality errors. Second, the screening process will also cause quality loss.

[0080]In order to verify that the data obtained by this method is more accurate than the traditional technical solution, in this embodiment, the traditional technical solution and this method will be used to measure and compare the quality of the fiber of the test piece.

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Abstract

The invention discloses a distribution uniformity evaluation method of basalt fibers in asphalt mortar, which comprises the following steps: placing basalt fibers in a vacuum tank, and pouring a fluorescent agent to obtain fluorescent fibers; calculating the mix proportion of the asphalt mortar, and preparing a basalt fiber asphalt mortar test piece through a rotary compaction instrument; dividing the test piece, marking the position of a cross section, and cutting along the marked position by adopting a cutting machine to obtain a two-dimensional cross section; irradiating the two-dimensional cross section by utilizing ultraviolet rays, and respectively carrying out observation and image digital processing on the two-dimensional cross section by utilizing a fluorescence microscope and a fluorescence microscope CCD (Charge Coupled Device); processing the cross-section image obtained through image digital processing, obtaining the number of cross-section fibers and the two-dimensional distribution condition, performing two-dimensional distribution uniformity evaluation, and then evaluating the three-dimensional distribution uniformity of the test piece; according to the method, the distribution condition of the fibers can be accurately obtained, and the method has guiding significance for preparation and performance evaluation of fiber asphalt mortar and a fiber asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a method for evaluating the distribution uniformity of basalt fibers in asphalt mortar. Background technique [0002] Nowadays, pavement engineering in our country is in the stage of rapid development, and asphalt pavement has gradually replaced cement pavement because of its superior performance. However, asphalt pavement still has problems such as insufficient durability, low crack resistance, and serious rutting. In recent years, many studies have found that basalt fiber, as a stable and reinforced inorganic material, can greatly improve multiple performance indicators of asphalt mixture, prolong the service life of asphalt pavement, meet the construction quality requirements of high-performance pavement, and meet the sustainable development strategy . [0003] However, the performance of basalt fiber asphalt mixture is greatly affected by the uniformity of fiber di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N1/28G01N1/38
CPCG01N1/286G01N1/38G01N21/6458
Inventor 张垚王业康爱红吴浩辰陈虎肖鹏
Owner YANGZHOU UNIV