Method for testing dynamic surface energy parameters of asphalt material

An asphalt material and asphalt technology, which is applied in the field of testing the dynamic surface energy parameters of asphalt materials, can solve problems affecting the accuracy of test results and calculation errors, and achieve the effects of preventing hysteresis effects, improving accuracy, and reducing conversion errors

Active Publication Date: 2017-05-31
WUHAN UNIV OF TECH +1
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Problems solved by technology

[0005] (2) The width and thickness of the asphalt-coated glass slides need to be manually tested during the testing process of the inserting board method. This step is easily affected by factors such as naked eye observation and subjective judgment to affect the accuracy of the test resu

Method used

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  • Method for testing dynamic surface energy parameters of asphalt material
  • Method for testing dynamic surface energy parameters of asphalt material
  • Method for testing dynamic surface energy parameters of asphalt material

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Embodiment approach

[0025] (1) Prepare asphalt material samples and chemical reagents

[0026] Five kinds of asphalt from different sources were selected as asphalt material samples, and they were numbered and stored in a refrigerator. Select distilled water, formamide, glycerol (glycerol) and ethylene glycol as liquid chemical reagents, store them in small aluminum boxes respectively, and then store them in cold storage. The surface energy parameters of the four reagents at 20 °C are shown in Table 1 .

[0027] Table 1 Surface energy parameters of liquid chemical reagents (20°C)

[0028]

[0029] (2) Preparation of asphalt-coated glass slides

[0030] Set the heating temperature of the oven (the base asphalt temperature is set to 145°C, the SBS modified asphalt temperature is set to 155°C), put the asphalt sample in the oven, and stir the asphalt with a stirring rod every 20 minutes to ensure that the asphalt is heated evenly . When the asphalt becomes fluid, the sample is taken out of th...

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Abstract

The invention discloses a method for testing dynamic surface energy parameters of an asphalt material. The method comprises the following steps: selecting four chemical reagent with known surface energy parameters, and respectively dropwise adding the four chemical reagents on the surface of an asphalt membrane; recording an advancing contact angle and a receding contact angle at the moment nearby a limit which tends to slide but is in a static state; solving cohesive energy of the asphalt in an advancing and receding process, and solving adhesional energy of the asphalt and aggregates in the advancing and receding process by combining with surface energy parameters of the aggregates; evaluating the healing performance and the water stability of an asphalt mixture by using the surface energy in the advancing process, evaluating the cracking performance of the asphalt mixture by using the surface energy in the receding process, quantizing the adhesion performance, and preferring a road material. The dynamic surface energy parameters of the asphalt are tested by adopting a static drop tilting method provided by the invention, and are enabled to correspond to healing and cracking performances and the water stability of the asphalt mixture; the method disclosed by the invention has certain advantages compared with an existing test method in aspects of reasonability and error control of a testing method and test operations.

Description

technical field [0001] The invention belongs to the field of road engineering, and specifically relates to a method for testing dynamic surface energy parameters of asphalt materials. Background technique [0002] In the field of road engineering, the dynamic surface energy parameters of asphalt materials are of great significance to accurately quantify the adhesion performance of asphalt-aggregate interface and study the cracking mechanism of asphalt mixture. Through the surface energy test to test the dynamic surface energy parameters of asphalt materials, the cohesive energy of asphalt itself and the adhesion energy between it and the aggregate can be calculated, and further comparative analysis can measure and evaluate the healing, cracking and water stability of asphalt mixture performance etc. [0003] The dynamic surface energy parameters of asphalt materials are divided into two categories: (1) surface energy parameters corresponding to the advancing process; (2) su...

Claims

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Application Information

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IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 罗蓉曾哲张德润张世飚李磊冯光乐董华均金露阳正茂王丽静丁春燕
Owner WUHAN UNIV OF TECH
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