RU2538251C2 - Protective mix of road pavements and method for its obtaining - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: protective mix of road pavements includes a black organic binding substance, a hardening modifier and a solvent in the following ratio, wt %: black organic binding substance - coal tar asphalt 45-55%; hardening modifier - acetone 4-6%; adhesive additive STARDOP 130P 1-3 wt %; solvent is the rest.

EFFECT: resistance to deformations, heat resistance, protection of road pavement against water and temperature difference.

7 cl, 1 tbl

Description

The invention relates to a technology for the protection of road surfaces, providing resistance to deformation, heat resistance, as well as the protection of road surfaces from water and temperature extremes, and can be used in the construction and repair of road surfaces of various types.

Known material for the restoration of asphalt coatings (patent RU 2290419, IPC C08L 95/00, publ. 12/27/2009), including bitumen, solvent and organic additives. The disadvantage of this material is its basis - bitumen - a viscous organic substance, which reduces the penetrating ability of the material as a whole.

A known method of producing a mixture for the paving device (patent RU 2057733, IPC C04R 26/26, publ. 04/10/1996), comprising mixing heated aggregate with mineral powder and a modifying additive, followed by mixing with a heated black organic binder. The disadvantage of this method is the high temperatures necessary for the introduction of modifying additives in the mixture.

The closest technical solution both in the composition of the mixture and in the method for its production is a synthetic asphalt mixture and the method for its production (US patent 4,437,896, IPC C08L 95/00, publ. 20.03.1984). This mixture contains melt oil and / or mealy pitch oil and natural or artificial gilsonite, and the method consists in sequentially mixing gilsonite, mealy oil and / or mealy pitch.

The disadvantage of this mixture is the high ambient temperature necessary for its use (above 25 ° C), and the long formation time of the layer is more than 3 hours.

The disadvantage of the method of manufacturing this mixture is that upon receipt of a two-component mixture, it is impossible to select reagents for specific working conditions.

The objective of the invention is the creation of a mixture for the protection of road surfaces with high adhesive properties to asphalt concrete, concrete, stone materials and steel and allowing its use at temperatures close to zero degrees Celsius, as well as a method for its preparation, allowing to select reagents for specific conditions carrying out work on its application.

To solve this problem, we propose a mixture for the protection of road surfaces, including black organic binder, a curing modifier and a solvent in the ratio, wt.%:

Black Organic Astringent Pitch 45-55

Cure modifier acetone 4-6

Adhesive additive Stardup 130P 1-3

Solvent Solvent - Else.

In addition, the mixture may additionally contain modifying additives:

- acidity regulator, for example dolomite flour 1-3 wt.%;

- carbon black 4-6 wt.%;

- plasticizers, for example tallow and / or oleic acid, 1.5-4.5 wt.%.

It was experimentally established that the above-mentioned additional components make it possible to produce a mixture for a specific type of pavement - asphalt, gravel, gravel, etc.

The method for producing a mixture for the protection of road surfaces includes heating the solvent, adding a black organic binder with stirring, raising the temperature of the reaction mass to 130-180 ° C, introducing modifying additives, cooling the reaction mass and introducing an adhesive additive, further cooling the reaction mixture and introducing, while mixing the curing modifier.

Before the introduction of the curing modifier, the reaction mixture is cooled to a temperature of 20 ° C.

After the introduction of the curing modifier, the mixture is stirred for 40 minutes.

The method of obtaining the mixture is as follows. The solvent is pumped into the reactor by a pump, after which the mixer is switched on. After turning on the mixing device, the electric heater is turned on. After heating the solvent to a temperature of 100 ° C, they begin to add pitch black organic binder (any pitch, for example, oil or coal or others), constantly increasing the temperature of the reaction mass to 160 ° C, with a constantly working stirrer. Then, dolomite flour and / or soot and / or tallow and / or oleic acid are introduced, after obtaining a homogeneous mass, the reaction mass is cooled to 80 ° C and Stardup 130P is introduced. - adhesion promoter (see, for example, Stardope 130P. Liquid cationic additive for pure and modified bitumen based on organic esters and vegetable oils. Typical physicochemical properties on eurokhimdor.ru> production ... stardope130p.html. Stardope 130P is a well-known adhesion promoter, liquid cationic additive for pure and modified bitumen based on organic esters and vegetable oils).

When the reaction mass is ready, it is cooled to 20 ° C and acetone is introduced. Stirring is performed for another 40 minutes.

The ratio of the components of the mixtures and properties are given in table 1.

The proposed mixture for the protection of road surfaces, prepared by the presented method, has the following advantages:

1. Application temperature: from + 5 ° C - which is facilitated by the introduction of a plasticizer.

2. The time of formation of the protective film: not more than 5-10 minutes and is not afraid of freezing due to the introduction of a curing modifier.

3. By varying the modifying additives, the mixture can be prepared for specific working conditions and specific pavements - asphalt, crushed stone or highly porous.

4. Seals and provides both external and internal waterproofing of asphalt concrete pavements.

5. Has high adhesion properties to asphalt concrete, concrete, stone materials of the "main" and "acidic" nature, steel.

6. Resistant to ultraviolet rays, salts, acids and alkalis - due to the introduction of an acidity regulator.

Table 1. Mixture number Composition and properties one 2 3 four 5 6 7 8 The composition of the mixture, wt. % Pitch 45 fifty 55 fifty fifty fifty fifty fifty Dolomite flour - - - 2 - - - - Soot - - - - 5 - - - Tallow oil - - - - - one - - Oleic acid - - - - - - 2 -

Stardup 130P - - - - - - - 2 Acetone four 5 6 5 5 5 5 5 Solvent rest Mixture properties Conditional viscosity on the viscometer like B3-246 (or B3-4) at 20 ± 0,5 ° C 25 28 36 28 37 thirty 32 28 Film resistance to static
water at 20 ± 2 ° С, h, not less 40 42 44 42 48 43 44 40 Film resistance to the static effect of a 3% NaCl solution at 20 ± 2 ° С, h, at least 40 42 44 42 48 43 44 40

Claims (7)

1. A mixture for the protection of road surfaces, including black organic binder, a curing modifier, adhesive additives and a solvent in the ratio, wt. %:
Black Organic Astringent Pitch 45-55
Cure modifier acetone 4-6
Adhesive additive Stardup 130P 1-3
Solvent Solvent - Else 2. The mixture according to claim 1, characterized in that it further comprises dolomite flour 1-3 wt.%. 3. The mixture according to claim 1, characterized in that it further comprises carbon black 4-6 wt.%. 4. The mixture according to claim 1, characterized in that it further comprises tal oil and / or oleic acid 1.5-4.5 wt.%. 5. The method of obtaining a mixture for the protection of road surfaces according to claim 1, comprising heating the solvent, adding a black organic binder with stirring, raising the temperature of the reaction mass to 130-180 ° C, introducing modifying additives, cooling the reaction mass and introducing an adhesion additive, further cooling the reaction mixture; and introducing, while stirring, a curing modifier. 6. The method according to claim 5, characterized in that before the introduction of the curing modifier, the reaction mixture is cooled to a temperature of 20 ° C. 7. The method according to claim 5, characterized in that after the introduction of the curing modifier, the mixture is stirred for 40 minutes.