Composition of the anti-icing water solution for roads surface treatment

FIELD: Composition of an anti-icing water solution for roads surface treatment.

SUBSTANCE: the invention is pertaining to production of composition of an anti-icing water solution for roads surface treatment against a winter slipperiness (snow rolling-ups, a glaze ice, black ice) n the roads and streets in cities and settlements. The composition contains, in mass %: 20-27 calcium chloride, 5-30 ethyl alcohol, 0.3-5 corrosion inhibitors (borax or sodium nitrite or their mixture), the rest - water. The technical result is - an increase of effectiveness of the composition application, an increase of friction coefficient due to a decrease of the ice density, a raise of the composition ice melting capacity.

EFFECT: the invention ensures an increase of effectiveness of the composition application, an increased friction coefficient and a decreased ice density, a raise of the composition ice melting capacity.

1 cl, 1 ex, 2 tbl

 

The invention relates to the production of anti-icing composition of an aqueous solution for surface treatment of roads from winter slipperiness (snow forward, ice, ice slick on the roads and streets in cities and towns.

Climatic features of the middle band cause high relevance against winter slipperiness on roads, bridges, sidewalks, etc.

Along with the traditional mechanical, thermal, friction means gaining strength chemical method of removing snow and ice formations from the surface of roads. For this purpose are inorganic, at least - organic compounds; also known mixed composition. As the main melting inorganic component known chlorides of calcium, sodium and magnesium, phosphate, potassium and sodium acetates, ammonium and magnesium, alkaline earth metal nitrates, sulfates of alkali metals and other organic additives used carbamide (urea), one-, two - and trivalent alcohols, surfactants.

A well-known drug for the removal of ice, containing 5-15% urea, 1-5% monohydroxy aliphatic alcohol and 60-70% of polyglycol (UK application No. 2027046, C 09 K 3/18, 1980).

Also known is a method of obtaining the composition of the deicing material, which is a mixture of salt (chloride ka is ice) with glycols (ethylene glycol) and anticorrosive additives (RF patent No. 2196796, published 20.01.2003,).

However, as one of the components of these drugs acts glycol, which is poisonous and expensive component.

Closest to the present invention is the anti-icing composition of an aqueous solution for surface treatment of roads containing calcium chloride, urea, corrosion inhibitor, and water (patent RF №2169751, C 09 K 3/18 published 27.06.2001).

The disadvantages of this structure should include not high enough coefficient of friction melkosherohovatuyu and srednestogovaya coatings due to insufficiently low density reagent, a sharp decline in the fusing ability at low temperature, loss of use during heavy snowfall.

The invention solves the problem of the expansion of the Arsenal liquid deicing compounds with high melting capacity and multifunctional range of applications to work with both thick and thin layers of ice and snow, increasing friction and road safety on melkosherohovatuyu and srednestogovaya coatings by reducing the density of the substance.

To achieve the mentioned technical result of the proposed composition containing calcium chloride and corrosion inhibitor, optionally enter ethyl alcohol, and the inhibitor is Orosei borax or sodium nitrite or a mixture with the following components, wt.%:

Calcium chloride20-27
Ethyl alcohol5-30
Corrosion inhibitor0,3-5
Waterrest

Distinctive features of the structure are the presence of ethyl alcohol and used as a corrosion inhibitor borax, or sodium nitrite, or mixtures thereof. This reduces the density of the composition, to increase the grip on melkosherohovatuyu and krupnozernovaya coatings, to increase the melting capacity. The decrease in the amount of ethanol in the composition does not result in a sufficient decrease in density and increase the fusing ability and duration of efficiency. Increasing the amount of ethanol is impractical because of the difficulty Miscibility with calcium chloride and the emergence of an alcohol smell, in addition, this leads to higher reagent.

Reducing corrosion inhibitor leads to insufficient corrosion effects on metals and concrete. The increase in the mass fraction of inhibitor is impractical due to the appreciation of composition.

When the content of calcium chloride less than 20% worsen the fusing properties of the composition, when the content is more than 27% of the melting capacity is not increased, moreover, is niela the considerable increase in the density, therefore, the increase of mass fraction of calcium chloride is also not meaningful.

All of the components included in the composition, are environmentally sound and provide sufficient corrosion resistance of the components and assemblies of vehicles, materials used in the construction of artificial structures, which is a significant advantage over known compositions.

The composition is prepared as follows. In the reactor pour water, add borax, sodium nitrite or mixtures thereof, calcium chloride, stirred at a temperature of 40°With, then add ethyl alcohol and again mix.

Example. To prepare 100 kg (100%) of the composition using 70 kg (70%) of water, 20 kg (20%) of calcium chloride (GOST 450-77), add 5 kg (5%) of sodium nitrite (GOST 19906-74) or borax (GOST 8429-77) or their mixture, mix, add 5kg (5%) of ethyl technical denatured (GOST R 51999-2002) and again mix. The resulting tool has the following characteristics:

The density of the solution at 20°1.24 g/m3

Freezing point -50°

pH of 6.7-7

The finished composition is distributed evenly by spraying on the surface of the snow-ice formation and subsequent removal of loose mass by mechanical means. The tests were carried out in the presence of ice formation thickness of 15-40 mm on the road and with phalcoboenus coating when the temperature is -15° With conditional consumption 0.2-0.3 l/m2.

Within 20 minutes the reagent interacted with ice, turning it into a partially thawed loosened snow mass, which is easily removed by mechanical means. In addition, reagent, propleurae cracks penetrated through the ice to the asphalt base, destroying the bond between the ice and the floor. In areas with ice thickness 15 mm ice deposits were fully converted into a mushy mass. In areas where ice thickness was greater their number has significantly decreased, and decreased adhesion of ice to the road surface, and the remaining chunks of ice were easily removed.

Tests, corrosion were carried out using metal plates (steel ST -3) within 30 days.

The first test consisted of immersing the plates in the lineup for 6 hours with subsequent drying in air for 18 hours a day.

The second mode of testing was wetting plates composition for 30 seconds, followed by drying for 1 hour at eight cycles per day.

The results are given in table 1.

To determine the coefficient of coupling with different types of road surfaces were tested the claimed composition and the prototype. Test reagents was performed using the portable device CPD-MADI-research Institute database of the Ministry of interior, the pre is assigned for the rapid measurement of friction road surfaces of different roughness, according to paragraph 6.4 "Technical guidance for construction of the road coating with a rough surface" VSN 38-90 and p. GOST R 50597-93. When the slip rubber simulator on the model of the road surface as the tire surface, the first contact zone rubber interacts with the layer composition, which under the action of vertical pressure leaves the contact. In the absence of significant mikroheranhvatho the time of extrusion of the layer composition is largely determined by its viscosity, the higher the viscosity, the greater the time required for its expression, and the lower the friction.

Determination of the coefficient of adhesion was carried out in the presence on the surface of snow and ice masses containing reagent, since the distribution of de-icing materials is especially important before the snowfall and snow. If the air temperature is -4°With snow mixed in the tank with the composition of the mass ratio: 34% snow, 66% of the reagent, then the resulting snow-water mixture with a spatula was applied on the surface of the sample 7-10 mm, and then measured. Average values calculated from the results of five measurements are shown in table 1.

As can be seen from tables 1 and 2, the density of the proposed composition decreases by 3.1%, grip is increased when the temperature -4°22.8% on m is Kosenkova coverage and 12% on srednecenovom the floor, and krupnozernovaya the coating remains similar to the prototype. Melting capacity increases at temperatures of -4, -8, and -16°and at -20°With the fusing ability of the same prototype. In addition, after processing the offer composition when drying coating fully restore their coupling.

The deicing composition of an aqueous solution for surface treatment of roads containing calcium chloride, corrosion inhibitor, characterized in that it further contains ethyl alcohol, and as a corrosion inhibitor contains borax, or sodium nitrite, or mixtures thereof in the following ratio, wt. %:

Calcium chloride20-27
Ethyl alcohol5-30
Corrosion inhibitor0,3-5
WaterRest



 

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