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Asphalt and ore material adhesion evaluation method based on wetting theory

An evaluation method, asphalt technology, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems that there is no uniform standard for the surface roughness of mineral materials, affecting asphalt spreading, and the stability of test temperature cannot be guaranteed.

Inactive Publication Date: 2016-05-11
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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Problems solved by technology

[0004] Limited by the test conditions, there is no unified standard for evaluating the adhesion of asphalt and mineral aggregates under high temperature using the wetting theory: the test methods are confusing, and different researchers have adopted different methods and different test standards. Some research results have also been obtained, but the experimental conclusions drawn by different test methods are difficult to unify; the measurement of the contact angle between asphalt and mineral aggregates at high temperatures is greatly affected by temperature, and the experimenters are more arbitrary in temperature control, so the experimental process cannot be guaranteed. The stability of the test temperature in the middle; the surface roughness of the mineral aggregate will also affect the spreading of asphalt on the surface of the mineral aggregate, but the same standard for the surface roughness of the aggregate is not proposed in the current research

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  • Asphalt and ore material adhesion evaluation method based on wetting theory
  • Asphalt and ore material adhesion evaluation method based on wetting theory
  • Asphalt and ore material adhesion evaluation method based on wetting theory

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the examples.

[0026] According to content of the present invention, concrete implementation steps are as follows:

[0027] Step 1: Select raw materials

[0028] Qinhuangdao 70# matrix asphalt is selected as the asphalt, and the performance indicators of the asphalt are shown in Table 1; Yunluo limestone is selected as the mineral material, and its performance indicators meet the requirements of the physical project used or follow the "Technical Specifications for Highway Asphalt Pavement Construction" (JTGF40-2004) requirements.

[0029] Table 1: Asphalt Performance Index

[0030]

[0031] Step 2: Specimen Preparation

[0032] The lying drop method requires the surface of the sample to be smooth and clean. For the mineral material, this test is to cut the mineral material with a particle size greater than 36mm into thin slices about 3mm thick with a precision cutter, and then use...

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Abstract

The invention relates to an asphalt and ore material adhesion evaluation method based on the wetting theory and belongs to the technical field of highway performance measurement. The method is used for evaluating asphalt and ore material adhesion under a condition of high temperature. The method comprises the following steps: measuring the surface tension of high-temperature liquid asphalt by virtue of a pendant-drop method, and measuring the contact angle of the asphalt with the surface of an ore material at the same temperature by virtue of a sessile drop method; and calculating the adhesion work of the asphalt and the ore material so as to evaluate the asphalt and ore material adhesion. Through utilizing the method to evaluate the asphalt and ore material adhesion under the condition of high temperature, the influence of the high-temperature liquid asphalt on the wetting capability of the ore material and the stability of an asphalt mixture can be reflected.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the adhesion between asphalt and mineral material based on the wetting theory under high temperature conditions, that is, by measuring the surface tension of asphalt and the contact angle of asphalt on the surface of mineral material at the same high temperature and the same set temperature, Furthermore, the adhesion work of asphalt and mineral aggregate is obtained to quantitatively evaluate the adhesion performance of asphalt and mineral aggregate, so as to reflect the influence of asphalt on the wettability of aggregate and the stability of asphalt mixture when it is liquid at high temperature. Background technique [0002] In recent years, the water damage of asphalt pavement has attracted more and more attention. Water damage has greatly reduced the performance and service life of the pavement. The asphalt mixture molding process involves multiple stages of adhesion process, and the a...

Claims

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Application Information

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IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 王筵铸王旭东张玉贞张蕾周兴业杨光张岩
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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