How to prevent road freezing?

1. Freezing can be prevented by using antifreeze

Antifreeze is a kind of coolant containing special additives, which is mainly used in the cooling system of liquid-cooled engines. Antifreeze has excellent properties such as antifreeze in winter, anti-boiling in summer, anti-fouling and anti-corrosion all year round.

the freezing point of water is ℃, and ordinary antifreeze can reach -4℃, while high-quality antifreeze should reach about -6℃, which is an important index to calibrate the quality of antifreeze.

2. Installation of anti-freezing pump can prevent water from freezing

Two anti-freezing pump devices are installed at the bottom of Daning Management Office, the first station of the middle route of South-to-North Water Transfer Project, which can stir the water surface to prevent freezing. Even though it was MINUS 5 degrees Celsius, the water in Daning surge tank rippled without freezing.

3. The use of kaempferol -7-O- glucoside can prevent water from freezing

When the temperature drops below zero degrees Celsius, water will condense tiny ice cores. With the ice cores, water molecules can be arranged on its surface according to certain rules to form ice crystals.

The research team of Professor Fujikawa Kizo of Hokkaido University found that the tissues of trees growing in cold areas will not freeze even in low temperature. The tissue components of these trees were extracted and analyzed, and it was found that kaempferol -7-O- glucoside could prevent the formation of ice nucleation. As long as .1% kaempferol -7-O- glucoside is added to the water, the water temperature will not freeze when it drops to MINUS 1 degrees Celsius.

4. Sprinkling salt on wet pavement can prevent icing

In order to prevent dangerous situations and accidents caused by road icing, highway management and maintenance personnel will sprinkle snow melting agent and industrial salt on the road.

5, the use of anti-icing paint can prevent icing

In addition to the important factor of temperature, the surface characteristics of the icing surface, especially the surface energy, the adhesion of the surface to ice and the hydrophobicity of the surface have great influence on the icing phenomenon.

Anti-ice and snow coating, after being coated on the solid surface, forms a thin hydrophobic molecular layer with special orientation on the surface of the material to be protected, which is essentially equivalent to building a separation membrane between the protected surface and the ice crystals, which can prevent the icing phenomenon.

6. Heating and heat preservation can prevent water from freezing

The freezing point of water is ℃ at standard atmospheric pressure, so water freezing can be prevented by heating and heat preservation of feed water to make its temperature higher than freezing point.

In addition, the freezing point of seawater is lower than that of fresh water. The freezing point of seawater is closely related to the salinity of seawater. When the salinity reaches 24.695, the freezing point of seawater is only-1.332℃. Therefore, adding salt to water can also prevent icing to some extent.

Baidu Encyclopedia-antifreeze

People's Daily Online-Nanshui's first stop in Beijing: an antifreeze pump installed at the bottom of the pool? Stir the water surface to prevent icing

People's Daily Online-Japanese scientists discover substances that reduce the freezing point of water

People's Daily Online-Fujian Transportation Department launches anti-icing plan

Baidu Encyclopedia-Anti-icing coating

Baidu Encyclopedia-Freezing point