Method for testing dynamic surface energy parameters of asphalt material

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...

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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 results;

[0006] (3) The way of testing the asphalt-reagent contact angle by the inserting plate method is indirect, it needs to calculate the contact angle with the help of the force graph of the asphalt film, and there will be calculation errors in the process of converting the contact angle

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