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

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...

AI Technical Summary

Problems solved by technology

Although it provides a test method for ice and snow melting ability of asphalt mixture, the preparation process of the test piece is complicated, and the measured shear force is affected by multiple factors.

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