Ice and snow melting effect test method of snow melting asphalt mixture

A technology for asphalt mixture and effect testing, which is applied in the direction of testing the strength of materials by applying stable shear force, so as to achieve accurate and reliable test data

Active Publication Date: 2015-02-25
BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a test method for quantitatively evaluating the ice and snow melting effect of snow-melting asphalt mixture, which is

Method used

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  • Ice and snow melting effect test method of snow melting asphalt mixture
  • Ice and snow melting effect test method of snow melting asphalt mixture

Examples

Experimental program
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Embodiment Construction

[0031] 1. Prepare frozen parts.

[0032] A group of 6 cylindrical snow-melting asphalt mixture specimens with a height of 50 mm and a diameter of 100 mm were formed by rotary compaction, and a group of 6 ordinary asphalt mixture specimens without snow-melting additives (mixture) were formed by the same method. The ratio and volume indicators refer to the design results of the ratio). After the two groups of test pieces are placed at room temperature, put them in a desiccator for use, and take them out after 24 hours. The specific test steps are as follows:

[0033] Step 1: Place a snow-melting asphalt mixture specimen 5 at the bottom of the test cylinder 1 with a diameter of 105mm±2.0mm and a height of 120mm±5.0mm, and place a cylindrical gasket 4 with a diameter of 5mm±1.0mm and a height of 5mm±1.0mm 'Place it in the center of the snow-melting asphalt mixture specimen 5, place the ordinary asphalt mixture specimen 3 on the gasket 4', inject 150ml of water 2 into the test cyl...

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Abstract

The invention relates to an ice and snow melting effect test method of a snow melting asphalt mixture, and the method comprises the following steps: (1) a snow melting asphalt mixture specimen and a common asphalt mixture specimen are prepared, (2) the two specimens are frozen together to prepare a frozen part, the two specimens are not contacted with each other because a connected ice layer is between the two specimens, and (3) shear test of the frozen part is performed, and the maximum loading force value F0 when the middle ice layer between the two specimens is separated from the specimens is recorded. The snow melting asphalt mixture contains chloride ions, the chlorine ions may slowly precipitate from the specimen surface to form an isolation layer on the specimen surface to make the freezing point greatly reduced, so that bond strength of the ice layer and the specimen surface of the snow melting asphalt mixture is greatly reduced, the ice and snow melting effect can be tested by testing shearing force of the specimen and the ice layer by the test, and a smaller shearing force shows better ice and snow melting capability. The test data for the method is accurate and reliable, and the ice and snow melting effect of the snow melting asphalt mixture can be quantitatively evaluated and determined in door by simulation of actual situations.

Description

technical field [0001] The invention relates to a test method for effectively evaluating the ice and snow melting effect of a snow-melting asphalt mixture, which belongs to the technical field of highway pavement performance testing. Background technique [0002] Snow icing on the road area in winter will cause traffic inconvenience and even cause traffic accidents. Pollution and corrosion damage of road auxiliary structures. In recent years, road researchers have begun to devote themselves to the development of efficient and environmentally friendly active snow and ice removal technologies, and have developed various active snow and ice removal road surface technologies. Active deicing and snow pavement technology refers to the processing of freezing point depressants through different processing techniques and molding them into particles or powders of different particle sizes to replace mineral materials of different particle sizes in the asphalt mixture. Under the action...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 柳浩杨丽英董雨明王建国李根王真李振李恩光王宝新
Owner BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP
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