The way to prevent slippery road surfaces, the raw mixture to obtain deicing to prevent slipperiness of road surface and method thereof

 

The invention relates to road maintenance production, in particular to methods of combating ice slick on the roads, bridges, roads, and airfields. The way to prevent slipperiness of road surfaces is to apply a coating of anti-icing reagent on the basis of salts of acetic acid. De-icing reagent is applied in the form of a granular material with a particle size of 0.1 to 12 mm as specified deicing use reagent on the basis of calcium-magnesium if acetic acid is obtained from a raw material mixture comprising by weight.h.: dolomite content of silicon inclusions of 0.2 and 16 wt.% or dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.% 180-200, acetic acid 50-150, an aqueous solution of potassium carbonate or 25% ammonia water 0,5-2, polyethylene glycol or polypropyleneglycol or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days 0-1. Acetic acid use ice and concentrated. A method of obtaining a de-icing reagent is a mixture of dolomite or dolomitic limestone with water and acetic acid, prigotovlenn is,5:3 or 25% ammonia water, or a mixture of an aqueous solution of potassium carbonate or 25% ammonia water with glycol or polypropyleneglycol or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days. Technical result: high environmental safety, the almost complete absence of residual acetic acid in the reagent, high anti-icing quality. 3 s and 5 C.p. f-crystals, 1 Il., table 2.

The invention relates to road maintenance production, in particular to methods of combating ice slick on the roads, bridges, roads, and airfields.

Known way to prevent slippery road surfaces by applying to the surface coating of sodium chloride (see Bialobrzeski Century, and others Struggle with winter slipperiness on roads. - M.: Transport, 1975, S. 26).

The disadvantage of this method is the acceleration of the destruction of pavements and concrete structures, high corrosion of metal parts of vehicles, salinity roadside soil.

Closest to the proposed method is a method of preventing slipperiness of road coating is odstv of polytetramethylene based on sodium acetate. This substance is used as a solid in a mixture of sand and liquid form - with the help of special machines. The solid mixture flow is 300 kg per 1000 m2. The liquid form is used in an amount of 0.2-0.3 l/m2(see EN 2178035 C1 IPC E 01 11/24, publ. 10.01.2002).

The known method is not safe because of the presence in the composition of the reagent of sodium chloride, and insufficient technology because of the need for its use in solid form mixed with sand.

Well-known raw material mixture to obtain deicing, including gidratirovannuyu dolomitic lime, glacial acetic acid, water and potassium acetate. The method of obtaining the reagent is pre-mixed dolomitic lime, glacial acetic acid and water with subsequent introduction of the mixture of potassium acetate (see U.S. Pat. US 5219483, publ. 15.06.1993).

Closest to the invention is a raw material mixture to obtain deicing to prevent slipperiness of road surfaces, including dolomite or dolomitic limestone, acetic acid and water. The content in dolomite Mg CO3up to 50%. Content of the suspension dolomite in water and acetic acid in the method of receiving deicing, includes mixing dolomite or dolomitic limestone with water and then with acetic acid. Unreacted acetic acid is rinsed with water. This method is the closest analogue to the method according to the invention.

The disadvantage of the reagent and method of its production is the availability of free acetic acid, reducing the environmental and corrosion safety.

The objective of the invention is to increase the environmental safety of the method and reagent, reducing the content of free acetic acid, as well as increasing the efficiency of use of the reagent.

The problem is solved in that way prevent slippery road surfaces by spraying on a coating of anti-icing reagent on the basis of salts of acetic acid as a deicing use reagent on the basis of calcium-magnesium salt of acetic acid, obtained from a raw material mixture comprising by weight.h.:

Dolomite content

silicon inclusions

0.2 to 16 wt.% or dolomi-

Tserovani limestone

with a silicon content

inclusions of 0.2-5 wt.% 180-200

Acetic acid 50-150

An aqueous solution of carbonate

potassium or 25%

ammonia is

not more than 30 days or

polyvinyl alcohol

with the Biodegradability

not more than 60 days 0-1

While acetic acid use ice and concentrated. Also de-icing reagent is applied in the form of a granular material with a particle size of 0.1 to 12 mm in Addition, de-icing reagent is applied in liquid form. Also the problem is solved in that the raw material mixture to obtain deicing to prevent slipperiness of road surfaces, including dolomite or dolomitic limestone, acetic acid and water, contains dolomite content of silicon inclusions of 0.2 and 16 wt.%, dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.% and further comprises an aqueous solution of potassium carbonate at sootnoshenii potassium carbonate : water 1:1-0,5:3 or 25% ammonia water and glycol or polypropyleneglycol or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days in the following ratio, wt.h.:

Dolomite content

silicon inclusions

0.2 to 16 wt.% or dolomi-

Tserovani limestone

with a silicon content

inclusions of 0.2-5 wt.% 180-200

glycol or

polypropylenglycol or

derivative

with the Biodegradability

not more than 30 days or

polyvinyl alcohol

with the Biodegradability

not more than 60 days 0-1

While acetic acid use ice and concentrated.

In addition, the problem is solved in that in the production method of deicing to prevent slippery road surfaces, comprising preparing a mixture of dolomite or dolomitic limestone with water and acetic acid, for the preparation of a mixture of dolomite use with a content of silicon inclusions of 0.2 and 16 wt.% or dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.%, the mixture in a thin layer treated with an aqueous solution of potassium carbonate at a ratio of potassium carbonate : water 1:1-0,5:3 or 25% ammonia water, or a mixture of an aqueous solution of potassium carbonate or 25% ammonia water with poliatilenglikola or polypropyleneglycol or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days, and the components are taken in the following ratio, wt.h.:

Dolomite content

silicon inclusions

0.2 to 16 wt.% or

D. the PTA 50-150

An aqueous solution of carbonate

potassium or 25%

ammonia water of 0.5-2

The glycol or

polypropylenglycol

or their derivatives

with the Biodegradability

not more than 30 days

or polyvinyl

alcohol with Biodegradability

not more than 60 days 0-1.

While acetic acid use ice and concentrated.

The invention is carried out as follows. First prepare the reagent. To prepare to use the following components.

Dolomite composition, wt.%:

CaO 30-42, MgO 15-23, SiO20,2-16, R2About30.003 to 0.7 and Fe2About30,005-0,65, H2O no more than 5, loss on ignition (p. p. p.) - the rest. Politizirovanny limestone composition, wt.%: CaO 34-35; MgO 14-18; SiO20.2 to 5; R2O3of 0.003 to 0.8; Fe2About30,005-0,64; N2Of not more than 8, p. p. p. - the rest.

Acetic acid, satisfying the following requirements on the content of components in wt.%:

acetic acid not less than 99,5, acetic anhydride't 0.004, sulphates not more than 0.05, chlorides not more than 0,0003,

heavy metals, deposited hydrogen sulfide, no more than 0,0004, the residue after evaporation of 0.0004.

The potassium carbonate in aqueous solution at a ratio of potassium carbonate : water 1:1-0,5:3. Ammonia water is not more than 30 days, use the following connections: the ethoxylated cocoat of polyethylene glycol, polypropylenglycol containing sodium hyaluronate, carboxypropanoyl polypropylenglycol rapeseed oil.

Polyvinyl alcohol with Biodegradability not more than 60 days, for example, mark A.

Example.

The method of producing reagent is as follows. Ground dolomite content of siliceous inclusions 8 wt.% mixed with water, the resulting suspension is injected concentrated acetic acid. Then the mixture in a thin layer process on a conveyor belt with a mixture of aqueous potassium carbonate solution with polyvinyl alcohol and dried at a temperature of 80°C.

Processing the prepared mixture can also be suspended in the layer.

The resulting reagent calcium magnesium acetate is a crystalline non-caking granular material with a 100% friability with a particle size of 0.1 to 12 mm, which allows you to carry it in bulk.

The presence of the original dolomite and dolomitic limestone of silicon inclusions provides abrasive properties of the reagent, which also improves the anti-icing properties and reduce the slipperiness of the road surface. This eliminates the necessity of using the dry reagent to mix it with sand. Preparing the following mixture is E. potassium carbonate : water 1:1, in examples 3, 4, 6 the ratio of potassium carbonate : water 0.5 to 3. When using other glycols similar results were obtained.

Obtained reagents were tested for their content of residual acetic acid. The results are given in table 2.

Also were tested for Biodegradability, aquatic toxicity, corrosion of metals and durability of the asphalt. The durability of asphalt concrete were tested in a cyclic mode freeze for 3-4 hours at -20°C and thawing in a 5% aqueous solution of the reagent. The results are shown in table 2.

The obtained data testify to the high quality of the reagent. The reagent decomposes at positive temperatures within 14 days and has no toxic effect on roadside vegetation, but on the contrary, the decomposition provides access of oxygen to the plant roots, acting as a cultivator of the soil.

The reagent does not contaminate ponds, because not exceed the MPC (maximum permissible concentration).

The reagent is not corrosive to steel and magnesium alloys, but hampers its corrosion over time. The drawing shows the effect of reagents on the corrosion of steel body. As can be seen from the above data, the corrosion body 2D/img_data/84/845648-s.gif" border="0">

This reagent is used to prevent slipperiness of the road surface.

On roads with ice formation using known mechanical devices inflicted bulk reagent calcium magnesium acetate with a particle size of 0.1 to 0.3 mm, the reagent Consumption was 30 g/m2.

You can also apply the reagent in liquid form in aqueous solution.

In the coating compositions of examples 1-6 were determined temperature effective use of the reagent. When using the reagent according to example 2, it was -30°C and examples 1, 3-6 increases to -45°C, due to a synergistic effect of glycols. The reagent is also useful for preventing slipperiness airfield pavements, because in addition to the prevention of ice formation is prevented, and significantly reduces the corrosion of metals used in aircraft construction.

Claims

1. The way to prevent slippery road surfaces by spraying on a coating of anti-icing reagent on the basis of salts of acetic acid, characterized in that, as specified deicing use reagent on the basis of calcium-magnesium salt of the Affairs of 0.2 and 16 wt.% or dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.% 180-200

Acetic acid 50-150

An aqueous solution of potassium carbonate or 25% ammonia water of 0.5-2

Polyethylene glycol, or polypropyleneglycol, or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days 0-1

2. The method according to p. 1, characterized in that the acetic acid used ice and concentrated.

3. The method according to p. 1, characterized in that the de-icing reagent is applied in the form of a granular material with a particle size of 0.1 to 12 mm

4. The method according to p. 1, characterized in that the de-icing reagent is applied in liquid form.

5. The raw material mixture to obtain deicing to prevent slipperiness of road surfaces, including dolomite or dolomitic limestone, acetic acid and water, characterized in that use dolomite content of silicon inclusions of 0.2 and 16 wt.% or dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.% and further comprises an aqueous solution of potassium carbonate at a ratio of potassium carbonate:water 1:1-0,5:3 or 25% ammonia water and glycol, or polypropyleneglycol, or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with biurowych inclusions of 0.2 and 16 wt.% or dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.% 180-200

Acetic acid 50-150

An aqueous solution of potassium carbonate or 25% ammonia water of 0.5-2

Polyethylene glycol, or polypropyleneglycol, or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days 0-1

6. Feed mixture according to p. 6, characterized in that the acetic acid used ice and concentrated.

7. The method of obtaining deicing to prevent slippery road surfaces, comprising preparing a mixture of dolomite or dolomitic limestone with water and acetic acid, wherein the mixture used dolomite content of silicon inclusions of 0.2 and 16 wt.%, dolomitic limestone with the content of silicon inclusions of 0.2-5 wt.%, the mixture in a thin layer treated with an aqueous solution of potassium carbonate at a ratio of potassium carbonate:water 1:1-0,5:3, or 25% ammonia water, or a mixture of an aqueous solution of potassium carbonate or 25% ammonia water with glycol, or polypropyleneglycol, or their derivatives with the Biodegradability not more than 30 days or polyvinyl alcohol with Biodegradability not more than 60 days, and the components are taken in the following souterrain silicon inclusions of 0.2-5 wt.% 180-200

Acetic acid 50-150

An aqueous solution of potassium carbonate or 25% ammonia water of 0.5-2

Polyethylene glycol, or polypropyleneglycol, or their derivatives with the Biodegradability not more than 30 days, or polyvinyl alcohol with Biodegradability not more than 60 days 0-1

8. The method according to p. 7, characterized in that the acetic acid used ice and concentrated.



 

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FIELD: road servicing industry.

SUBSTANCE: the invention is dealt with the road servicing industry, in particular with the methods of extirpation of ice covering on motorways, bridges, flyovers, and also aerodromes. The method of the roadway covering slipperiness prevention provides for application of a roadway ice covering suppressing reactant based on acetate, in the capacity of which use a solution with pH=7-9.5, containing components in the following ratio (in mass %): magnesium acetate 13-17, potassium acetate 8-16, potassium hydrocarbonate 5-8, potassium carbonate 2-6, water-insoluble impurities 0-6, water - the rest. The roadway ice covering suppressing reactant may additionally contain a fired limestone in amount of 3-5 mass % in terms of calcium oxide. The method of production a roadway ice cover suppressing reactant for a roadway covering slipperiness prevention provides for mixing of a component containing a magnesium compound, iced acetic acid and water, in the capacity of the component containing the magnesium compound is used brucite, the stirring is exercised in two stages: first they continuously agitate brucite with water and a part of iced acetic acid in a stoichiometric ratio at the temperature of 50-70°C within 50-80 minutes, then, not terminating mixing at the same temperature in the produced mix with pH=5-6 add the rest of ice acetic acid and then add potash in amount exceeding by 0.1 - 6 % the stoichiometric ratio and continue agitation till production of the roadway ice cover suppressing reactant - a solution with pH = 7-9.5 with the above indicated composition. The used roadway ice cover suppressing reactant has composition mentioned above. The technical result consists in - maintenance of the low temperature at the reactant usage, ensuring the passing ice covered roadways motor vehicles metal corrosion protection and at use as the airfield runways coatings - the corrosion protection of metals used in aircraft designs as well. The roadway coating treated with the reactant has a high coefficient of adhesion, that reduces the accident rate on the roadways.

EFFECT: the invention ensures, that the roadway coating treated with the reactant decreases the accident rate on the roadways.

6 cl, 2 tbl, 4 ex

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