What are the dangers of sprinkling too much salt on the road

When it snows, the salt sprinkled on the road is called "snow melting agent", and the main raw material is industrial salt, which has many impurities and toxins and cannot be eaten. The main hazard is the pollution of the environment. There are two main aspects to this pollution:

1. Pollution of soil will cause soil salinization; 2. Pollution of plants will cause plants to die due to excessive water loss. Therefore, there are strict requirements for the use of snow melting agent, unless necessary, do not use it during the day; Before use, it must be reviewed and approved by the supervisor. In most cases, snow removal should be done manually or mechanically.

Polluting the soil environment and damaging the asphalt road surface.

Reasons why the cement pavement cannot be sprinkled with salt:

1. Accelerate the corrosion and aging of steel bars. Table salt is not allowed to be added to concrete, and chloride ions in table salt.

It can corrode the passivation film on the surface of the steel bar, which in turn leads to the corrosion of the steel bar.

2. Initiate alkali aggregate (ASR) reaction. Even plain concrete.

Even if there is no steel bar), it is difficult to escape the "magic hand" of salt. Table salt is also a sodium salt, which has the ability to cause alkali aggregate reaction.

The alkali aggregate reaction generally occurs gradually after a few years after the concrete is formed, resulting in a decrease in the durability of the concrete, and in severe cases, it will undergo destructive expansion, which will lead to the loss of the use value of the building.

How can salt be prevented from invading concrete

Multi-point anchoring PE board, which is a very effective anti-corrosion material, whether it is cathodic protection, concrete admixture.

It can be said that these anti-corrosion methods have their own advantages, but the shortcomings are more prominent, and the multi-point anchoring PE board is to make up for the shortcomings of these methods, whether it is cracking, falling off, and the life is very good, there is only one reason for the serious problem of multi-point anchoring PE board, that is, the overall destruction of the concrete structure, otherwise it will run very well, at least for 50 years, It can even become a material for a centennial project.

Yes。However, in general, the damage to the car body is very low when the paint protection is intact. The salt composition of snowmelt is mainly potassium acetate and chloride salt, which can easily rust the metal when in direct contact with the metal without a protective layer.

The main component of salt is sodium oxide, which is very soluble in water and can reduce its freezing point, so as to prevent the road surface from freezing, but the number of salt sprinkling is too much, which may affect the surrounding environment.

The cement road will rot when sprinkled with salt because:1.In the northern region, there are many cities after the winter snow.

A large amount of NaC1 crystals are sprinkled on the cement concrete pavement, and because the NaC1 crystals are able to absorb a part of the water and remain liquid at very low temperatures, it is able to melt the snow and ice (salt can reduce the freezing temperature of the water).Under the load of the vehicle, the crack gradually extends. until the entire panel is crushed.

This seriously damages the service life of the road.

2.Cement pavement: Brine from snow remover penetrates into the cement concrete. The erosion of salt water causes the cement mortar to form a powder, which is mixed with water to form a white slurry and floats, and the overall compressive strength of the concrete is attenuated.

3.Asphalt pavement: The asphalt surface layer falls off, potholes and congestion in the pavement pavement of the highway aggravated, which gradually leads to large-scale damage to the pavement.

As a result, after the pavement passes through winter, white skin appears locally. Where white skin appears, the strength, stability, and interlayer connections of the layers are reduced.

When it snows, the salt sprinkled on the core surface of the road is called "snow melting agent", the main raw material is industrial salt, there are many impurities and toxins, and it is inedible, and the main hazards are:

1. Polluting the environment is mainly divided into two aspects: pollution of the soil, which will make the soil salinized; Pollution of plants will cause plants to die due to excessive water loss;

2. Corroded pavement, long-term use will destroy the large surface of road reform;

3. Pollute the soil and salinize the soil;

4. Pollute plants, so that plants die due to excessive water loss.

The main chemical component of table salt is sodium chloride, and some also have small amounts of potassium iodate and sodium carbonate. After sprinkling sodium chloride on the snow, the surface of the snow has a layer of sodium chloride solution because the sodium chloride is extremely soluble in water and lead. The freezing point of water is zero degrees, and when sodium oxide is dissolved in water, the freezing point of the solution is greatly reduced.

1. Macro perspective: The main chemical component of table salt is sodium chloride, and some have a small amount of potassium iodate and sodium carbonate. After sprinkling sodium chloride on the snow, the surface of the snow has a layer of sodium chloride solution because the sodium chloride is highly soluble in water.

The freezing point of water is zero degrees, and when sodium oxide is dissolved in water, the freezing point of the solution is greatly reduced.

2. Microscopic perspective: when sodium chloride is dissolved in water, when the ionization into sodium ions and Shouxiang chloride ion water is to freeze, when chloride ions and sodium ions exist, chloride ions and sodium ions will destroy the network structure of water crystals, so that the water cannot freeze.

The main component of salt is sodium oxide, which is easily soluble in water and can reduce its freezing point, so as to prevent the road surface from freezing, but the number of salt sprinkling is too much, which may affect the surrounding environment.

1. Reduce the freezing point

Salt spraying on the road surface can reduce the freezing point of the solution, because the main component of salt is sodium oxide round hall, which will quickly dissolve into it after contact with ice and snow, and can reduce the freezing point of ice and snow, and the icing difficulty of ice and snow can be increased after the icing temperature of ice and snow is reduced, which can prevent the road surface from icing.

2. Environmental hazards

The salt particles on the road surface will penetrate into the ground with the snow water, which may cause pollution to the groundwater, and there are generally pipes laid on the road, and the pipes are easy to be corroded after a long time, and at the same time will lead to salinization of the land.

3. Spray snow melting agent

The main component of the snow melting agent is also sodium oxide, but the content is relatively low, and the pollution to the environment is small.