Anti-freezing asphalt mixture and preparation method thereof

Abstract

The invention relates to the field of road materials, and particularly discloses an anti-freezing asphalt mixture and a preparation method thereof. The anti-freezing asphalt mixture is prepared from the following raw materials in parts by weight: 170-280 parts of aggregate, 40-70 parts of mineral powder, 150-250 parts of asphalt and 30-60 parts of an anti-freezing agent, The anti-freezing agent is prepared from the following raw materials in parts by weight: 10-26 parts of organic salt, 5-15 parts of volcanic rock particles, 25-75 parts of a slow release agent and 1-5 parts of a coating agent. The preparation method comprises the following steps of: well mixing the aggregate, the mineral powder and the anti-freezing agent, adding the mixture into molten asphalt, and mixing well to obtain the anti-freezing asphalt mixture. The anti-freezing asphalt mixture disclosed by the invention has the advantage of good anti-freezing effect.

Description

technical field [0001] The application relates to the field of road materials, more specifically, it relates to an anti-icing asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixture is a kind of composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder. Paving roads with asphalt mixture is a commonly used road surface form in my country. [0003] In the early winter or the end of winter, the temperature alternates between cold and warm, and the snowfall on the road surface gradually melts under the action of driving load. Under the action of negative temperature, it is easy to form thin ice, and the anti-skid performance of the road surface drops sharply. Ice and snow greatly reduce the adhesion coefficient of vehicle tires, which seriously affects the operational stability and safety of vehicles. Therefore, it is necessary to carry out anti-icing treatment on the road surface. [0004] At p...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly two methods for road deicing. One is to remove the road ice by mechanical removal and spraying deicing agent after the snow on the road is frozen. However, these methods have low efficiency, high cost and environmental impact. Pollution and other disadvantages; the other is to add anti-icing agent to the pavement material to reduce the freezing point of the pavement material, so as to suppress the icing of the road surface, which can greatly reduce the cost of deicing in the later stage, so it has been more and more widely used

[0005] Most of the anti-icing agents are salt-storing anti-icing agents. Under the vehicle load, the salt in the admixture is released from the capillary space of the mixture to lower the freezing point of ice and play an anti-icing effect. found that the anti-icing effect of existing anti-icing agents is not particularly ideal