Method for evaluating snow and ice melting capacity of anti-freezing asphalt mixture

A technology of asphalt mixture and evaluation method, which is applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of complex preparation process and large shear force deviation, and achieve simple operation steps, accurate bond strength, and accurate data reliable effect

Inactive Publication Date: 2016-07-27
JIANGSU SINOROAD ENG TECH RES INST CO LTD
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Problems solved by technology

Although it provides a test method for ice and snow melting ability of asphalt mixture, the preparation

Method used

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  • Method for evaluating snow and ice melting capacity of anti-freezing asphalt mixture
  • Method for evaluating snow and ice melting capacity of anti-freezing asphalt mixture

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Embodiment 1

[0024] like figure 1 and figure 2 The schematic diagram of the ice and snow melting ability evaluation test piece of the antifreeze asphalt mixture shown, the specific evaluation steps are as follows:

[0025] Step 1: Form a set of (3) cylindrical antifreeze asphalt mixture specimens 2 with a height of 63.5mm and a diameter of 101.6mm by Marshall's method. Apply a layer of paraffin evenly;

[0026] Step 2: Place the test piece 2 in step 1 under the environmental condition of -5°C, spray 4mm thick pre-prepared water at 0°C on the surface of the test piece 2, and put the drawing head 4 on the surface of the test piece 2 at the same time, Freeze together with water, place 3 pulling heads 4 on the surface of each Marshall test piece 2;

[0027] Step 3: Continue to place the specimen 2 in step 2 for a freezing test for 24 hours at -5°C, and then conduct a small pull-out test at -5°C using an adhesion puller with a loading rate of 0.02MPa / s, record the pull-out strength when t...

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Abstract

The invention discloses a method for evaluating snow and ice melting capacity of an anti-freezing asphalt mixture. The method comprises the following steps: preparing a Marshal test piece by adopting an anti-freezing asphalt mixture, simulating the site freezing conditions, and testing the anti-drawing strength of the test piece. Because the adopted anti-freezing asphalt mixture during test piece preparation contains salts, chloride ions in the salts are gradually separated out of the surface of the test piece, and an isolating layer is formed on the surface, so that the ice point of the solution is reduced; and therefore, the cohesive force of the ice layer and the test piece surface of the anti-freezing asphalt mixture is greatly reduced. According to the test method disclosed by the invention, the interfacial adhesion strength of the test piece and the ice layer is tested, the snow and ice melting effect is further evaluated, and the lower the anti-drawing strength is, the higher the snow and ice melting capacity is. The actual conditions can be simulated indoors, and the snow and ice melting effects of different anti-freezing asphalt mixtures can be quantitatively evaluated; and moreover, the method has the advantages that operating steps are simple and data is accurate and reliable.

Description

technical field [0001] The invention relates to a performance testing technology of highway pavement, in particular to a method for evaluating ice and snow melting ability of antifreeze asphalt mixture. Background technique [0002] The climate in northern my country is cold in winter, and many highways and urban roads are often damaged by ice and snow. When the snowfall is heavy, the road surface is basically in the state of ice and snow. About 15% to 30% of traffic accidents in winter are related to the snow on the road area. The direct economic loss caused by the freezing of snow amounts to hundreds of millions of yuan, and it usually requires a lot of manpower and material resources to remove the snow and ice. The traditional method of spreading chloride salt to remove ice and snow takes a long time to melt ice and snow, and requires a large amount of chloride salt, which increases the cost and aggravates environmental pollution. [0003] In recent years, road researcher...

Claims

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Application Information

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IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 关永胜周文耿磊
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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