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Method for measuring fiber density

A method of measuring fiber density, which is applied in the field of fiber density measurement, can solve the problems that distilled water is difficult to completely infiltrate the fiber, affects the fiber's full immersion, and the addition of distilled water is limited, so as to achieve accurate and reliable measurement, accurate and stable test results, and high density. small effect

Inactive Publication Date: 2015-04-08
XIAN HIGHWAY INST
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Problems solved by technology

The disadvantages of this method are: (1) The sample volume often occupies a large part of the volume of the pycnometer, resulting in limited addition of distilled water, which affects the full immersion of the fiber
(2) It is difficult for distilled water to completely infiltrate the fibers, and more fibers are suspended above the distilled water, which affects the accuracy of liquid level readings
(3) Due to the small quality of the sample used, the test operation process must be strictly controlled, which puts forward extremely high requirements for the test environment, equipment and operators

Method used

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  • Method for measuring fiber density
  • Method for measuring fiber density

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with specific examples, but the present invention is not limited to these examples.

[0026] Select A, B two kinds of lignin fibers of different manufacturers, respectively adopt the assay method of the present invention and pycnometer to measure.

[0027] Adopt the measuring method of fiber density of the present invention to measure the density of A, B two kinds of lignin fibers respectively, specifically comprise the following steps:

[0028] Step 1, take a clean and dry volumetric flask, weigh the mass of the volumetric flask, and record it as m 1 .

[0029] Step 2, take A or B lignin fiber, weigh the fiber mass, record it as m 2 ; Put the fiber into the volumetric flask, and then inject kerosene into the volumetric flask until the liquid level of kerosene is close to the scale line of the volumetric flask; soak the fiber in kerosene for 16 hours, then place the volumetric flask in a co...

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Abstract

The invention relates to the field of fiber density detection and in particular discloses a method for measuring fiber density. A volumetric flask serves as a measuring container, kerosene serves as a measuring medium, and the fiber density is detected by utilizing an Archimedes principle. The measurement method disclosed by the invention is easy to operate, high in measurement result accuracy and low in cost and is suitable for fiber density measurement of various occasions such as labs and engineering fields.

Description

technical field [0001] The invention relates to the field of fiber density detection, and specifically discloses a method for measuring fiber density. Background technique [0002] Fibers have been used in asphalt concrete for more than 20 years. Fiber stabilizers must be used in the production of asphalt mastic macadam mixture (SMA). types. The role of fiber in SMA is as follows: 1) Fiber exists as a three-dimensional dispersed phase in the mixture, which can act as a reinforcement; 2) Fiber can properly disperse the asphalt mineral powder micelles to prevent the road from flooding. 3) The fibers can fully absorb asphalt, reduce free asphalt, increase the amount of asphalt, increase the thickness of the asphalt film, and improve the durability of the mixture; 4) The fibers are evenly dispersed in the asphalt mixture, improving the asphalt and aggregate The adhesion between them makes the asphalt film in a relatively stable state and significantly improves the high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/14
Inventor 张娟郭平马庆伟李艳
Owner XIAN HIGHWAY INST
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