Quantitative evaluation method for water-resistant stripping performance of asphalt and aggregate
A water-stripping, asphalt mixture technology, applied in the direction of removing certain components such as weighing, measuring devices, analyzing materials, etc., can solve the problem that the comprehensive stripping of asphalt aggregates cannot be fully reflected.
Inactive Publication Date: 2018-12-28
CHINA GEZHOUBA GRP HIGHWAY OPERATION CO LTD
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Problems solved by technology
In the process of asphalt stripping, peeling will occur between the asphalt and the asphalt and between the asphalt and the aggregate interface. The method of visually measuring the exposed area of the aggregate can only reflect the peeling of the asphalt-aggregate interface, and there is a large error , cannot fully reflect the comprehensive stripping of asphalt aggregates in the boiling process
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[0060] Implementation case: Select five common aggregates (basalt, limestone, diabase, hornshanite, broken gravel) and two kinds of matrix asphalt in road engineering, which are recorded as A and B respectively, and carry out the test according to the above steps.
[0061] Table 1 A bitumen test results (%)
[0062]
[0063] Table 2 B asphalt test results (%)
[0064]
[0065]
[0066] It can be seen from the test results that no matter it is A or B asphalt, the ranking of the comprehensive stripping rates of the five aggregates is: basalt
[0067] In the test results of asphalt B, the bare areas of basalt, limestone, and granite surfaces are all close to 0%, and it is difficult to evaluate the performance of water stripping by observing th...
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The invention discloses a quantitative evaluation method for water-resistant stripping performance of asphalt and aggregate. The quantitative evaluation method comprises the steps of acquiring aggregate with grain sizes being 13.2-19 millimeters, and marking mass as m0; uniformly stirring the aggregate and hot asphalt to form an asphalt mixed material, marking mass as m1; performing water bath one asphalt mixed material, and weighing and marking mass as m2 after drying; acquiring asphalt mass loss rate T1 according to a formula: T1=(m1-m2)/(m1-m0)*100%, wherein the T1 is used for representingstripping condition between asphalt membranes; determining surface exposure rate T2 of the aggregate, wherein the T2 represents stripping condition between the asphalt membranes and aggregate pastinginterface; and obtaining integral stripping rate T according to a formula: T=(T1+T2)/2. According to the method, the water-resistant stripping capability is evaluated in a quantitative form, and personal error is reduced to the greatest extent; and therefore, the stripping conditions between the asphalt membranes and between the asphalt membranes and the aggregate surface are comprehensively considered, and the evaluation result is more comprehensive and objective.
Description
technical field [0001] The application relates to the technical field of highway engineering tests, in particular to a method for quantitatively evaluating the water-stripping resistance of asphalt and aggregates. Background technique [0002] Most of the highways in our country are asphalt pavement. The water-stripping performance of asphalt and aggregates directly affects the water damage resistance of asphalt mixture. How to accurately evaluate the water-stripping ability of asphalt and aggregates is the raw material of road engineering. An important question in the experiment. [0003] The current "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" stipulates that the evaluation can be carried out by boiling or water immersion, and the adhesion can be reflected by observing the peeling degree of the asphalt film. Although this method is simple and easy to implement, it has large human errors. In the process of asphalt stripping, peeling will occu...
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IPC IPC(8): G01N5/04G01N21/84
CPCG01N5/04G01N21/84
Inventor 郑松松屈庆余李振珂郭璞
Owner CHINA GEZHOUBA GRP HIGHWAY OPERATION CO LTD
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