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Method for determining composition and content of residual mineral powder in extraction process of asphalt mixture

A technology of asphalt mixture and extraction process, which is applied in the direction of measuring devices, particle size analysis, scientific instruments, etc., can solve the problem that the mineral powder content of asphalt mixture is lower than the real value, and the composition of mineral powder particles cannot be directly tested, which affects the performance evaluation of asphalt Accuracy and other issues, to achieve fast and efficient measurement process, intuitive and reliable detection results, easy to grasp the effect of application and promotion

Inactive Publication Date: 2018-06-01
JIANGSU SINOROAD ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the extraction process of asphalt mixture, the ore powder is separated from the asphalt-trichlorethylene mixed solution by centrifugation, and there will be fine particles of ore powder permanently remaining in the asphalt-trichlorethylene mixed solution, which cannot be obtained, resulting in inability to Direct measurement of particle composition of residual mineral fines
The existence of residual slag, on the one hand, will cause the slag content of the asphalt mixture obtained in the test to be lower than the real value; on the other hand, the residual slag will affect the accuracy of the later evaluation of asphalt performance

Method used

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  • Method for determining composition and content of residual mineral powder in extraction process of asphalt mixture
  • Method for determining composition and content of residual mineral powder in extraction process of asphalt mixture
  • Method for determining composition and content of residual mineral powder in extraction process of asphalt mixture

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Embodiment 1

[0037] The present invention is a method for measuring the composition and content of residual mineral powder in the extraction process of asphalt mixture, comprising the following steps:

[0038] (1) Use a laser particle size analyzer to measure the particle composition and distribution of the original mineral powder. The test results are shown in figure 1 . The laser particle size analyzer is MS2000 Malvern laser particle size analyzer.

[0039] (2) Mix the raw ore powder in (1) with asphalt and aggregates to form an asphalt mixture, and disperse and cool at room temperature. The original slag powder is limestone slag powder, and the asphalt is SBS modified asphalt. The performance index test results are shown in Table 1.

[0040] Table 1 Test results of performance indicators of SBS modified asphalt

[0041]

[0042]

[0043] Limestone is used as the aggregate, and the test results of its relative density are shown in Table 2.

[0044] Table 2 Aggregate Relative D...

Embodiment 2

[0055] The present invention is a method for measuring the composition and content of residual mineral powder in the extraction process of asphalt mixture, comprising the following steps:

[0056] (1) Use a laser particle size analyzer to measure the particle composition and distribution of the original mineral powder. The test results are shown in Figure 4 . The laser particle size analyzer is MS2000 Malvern laser particle size analyzer.

[0057] (2) Mix the raw ore powder in (1) with asphalt and aggregates to form an asphalt mixture, and disperse and cool at room temperature. The original slag powder is limestone slag powder, and the asphalt is SBS modified asphalt. The performance index test results are shown in Table 4.

[0058] Table 4 SBS modified asphalt performance index test results

[0059] Penetration 25°C (0.1mm)

Softening point (℃)

Ductility 5℃(cm)

46.7

81.6

31.0

[0060] Limestone is used as the aggregate, and the test resul...

Embodiment 3

[0072] The present invention is a method for measuring the composition and content of residual mineral powder in the extraction process of asphalt mixture, comprising the following steps:

[0073] (1) Use a laser particle size analyzer to measure the particle composition and distribution of the original mineral powder. The test results are shown in Figure 7 . The laser particle size analyzer is MS2000 Malvern laser particle size analyzer.

[0074] (2) Mix the raw ore powder in (1) with asphalt and aggregates to form an asphalt mixture, and disperse and cool at room temperature. The original slag powder is limestone slag powder, and the asphalt is SBS modified asphalt. The performance index test results are shown in Table 7.

[0075] Table 7 SBS modified asphalt performance index test results

[0076] Penetration 25°C (0.1mm)

Softening point (℃)

Ductility 5℃(cm)

46.7

81.6

31.0

[0077] Limestone is used as the aggregate, and the test resul...

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Abstract

The invention provides a method for determining composition and content of residual mineral powder in an extraction process of an asphalt mixture. The method comprises the following steps: (1) determining the particle composition and distribution of original mineral powder by a laser particle size analyzer; (2) blending the original mineral powder in (1) with asphalt and aggregate to form the asphalt mixture, and dispersing and cooling the asphalt mixture; (3) extracting the asphalt mixture in (2) by extraction equipment; (4) collecting non-residual mineral powder after extraction, and determining the particle composition and distribution of the non-residual mineral powder by the laser particle size analyzer; (5) comparing the particle composition and distribution of the original mineral powder in (1) and the non-residual mineral powder in (4), determining the composition of the residual mineral powder on the basis of the difference between the two kinds of particle composition, and calculating the content of the residual mineral powder on the basis of integral of the difference between the particle distribution of the two kinds of mineral powder. The method has the advantages of being simple to operate, rapid, efficient, easy to realize, easy to master, apply and popularize and high in data result stability and accuracy, and a measurement result is visual, real and reliable.

Description

technical field [0001] The invention relates to road engineering materials, in particular to a method for determining the composition and content of residual mineral powder in the extraction process of asphalt mixture. Background technique [0002] The purpose of asphalt mixture extraction is to separate the mineral powder from the asphalt-trichlorethylene mixed solution. When the centrifuge rotates at high speed, it drives the extraction solution to rotate, and the mineral powder particles with a particle size larger than the filter paper pores stay on the filter paper, while the fine mineral powder particles with a particle size smaller than the filter paper pores will pass through the filter paper with the extraction solution and remain in the asphalt. - In a mixed solution of trichlorethylene. [0003] During the extraction process of asphalt mixture, the ore powder is separated from the asphalt-trichlorethylene mixed solution by centrifugation, and there will be fine p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 邵慧君张万磊陈广辉何文政
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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