RU2732751C2 - Mineral-organic composite for protection of road surfaces and method for production thereof - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to technology of protecting road surfaces from climatic and technological effects and can be used in construction and repair of road pavements of various types. Method of producing mineral-organic composite consists in the fact that sulfur-bitumen binder containing, wt %: bitumen 50–80, technical sulfur 20–50, is loaded into a reactor, heated to 140 °C, sulfur-bitumen binder makes 45–55 wt % mineral-organic composite, after which the mixer is turned on and, with constant stirring, a KAP adhesive additive of 1.5–4 wt % is added to the reactor, further mixing for 10–15 minutes, then heated, uniformly mixed mineral-organic composite metering pump is fed to input of colloid mill, to which a curing modifier acetone—4–6 wt % is pre-mixed in the declared ratio by dosing pump from the supply bunker. and solvent—aromatic hydrocarbons or their mixtures—balance up to 100 %. Mineral-organic composite for protection of road surfaces, containing, wt %: said sulfur bitumen binder 45–55, adhesive additive KAP 1.5–4, hardening modifier acetone 4–6, solvent—aromatic hydrocarbons or their mixture—the rest. Invention is developed in subclaims.

EFFECT: technical result is improved performance of composite for protecting road surfaces in a wide range of climatic and industrial impacts.

4 cl, 2 tbl, 1 ex

Description

The invention relates to technologies for protecting road surfaces from climatic and man-made influences and preventing slipperiness on them at zero and negative ambient temperatures and can be used in the construction and repair of road surfaces of various types.

Known material for the restoration of asphalt concrete pavements (patent RU 2290419, publ. 27.12.2006), including bitumen, solvent and organic additives. The disadvantage of this material is its increased viscosity, which reduces its penetrating ability.

A known method of producing a mixture for the device of road surfaces (patent RU 2057733, publ. 10.04.1996), including mixing a heated aggregate with a mineral powder and a modifying additive, followed by mixing with a heated black organic binder. The disadvantage of this method is the high temperatures required for the introduction of a modifying additive into the mixture.

A known method of producing a mixture for the device of road surfaces (patent RU 2538251, publ. 27.10.2014), which offers a mixture for the protection of road surfaces, including a black organic binder, a curing modifier, solvent and mineral modifying additives. The disadvantage of the obtained material is a lot of technological improvements during its production.

The objective of the present invention is to create a mineral-organic composite for the protection of road surfaces, possessing high adhesion properties to asphalt concrete and cement concrete, allowing it to be used at temperatures close to zero degrees Celsius, ensuring the resistance of road surfaces to climatic and technogenic influences, as well as increasing coefficient of adhesion and prevention of slipperiness at zero and negative ambient temperatures.

The technical result is improved performance of the composite for the protection of road surfaces in a wide range of climatic and man-made influences.

The technical result is achieved due to the fact that the mineral-organic composite for the protection of road surfaces includes a sulfur-bitumen binder, a solvent, a curing modifier, adhesive in the ratio, wt%:

Bituminous binder, 45 - 55;

Curing modifier acetone, 4 - 6;

Adhesive additive KAP, 1, 5 - 4;

Solvent (aromatic hydrocarbons or mixtures thereof) - the rest.

And additionally contains anti-icing additive Grikol, 4-8 over 100%.

Also, the technical result is achieved due to the fact that in the method of obtaining a mineral-organic composite bitumen 50-80 wt.%, Technical sulfur 20-50 wt.% (All of the mass of the sulfur-bitumen binder) is loaded into the reactor, heated to 140 ° C, after which includes a stirrer and, with constant stirring, an adhesion additive KAP is added to the reactor, then it is stirred for 10-15 minutes, then a heated, uniformly mixed mineral-organic composite is fed by a metering pump to the input of a colloid mill, to which pre-mixed in the declared the ratio of solvent (aromatic hydrocarbons or mixtures thereof) and the curing modifier acetone. In this case, after turning on the mixer, with constant stirring, an anti-icing additive Grikol is added to the reactor.

The method of obtaining a mineral-organic composite is carried out as follows.

All ratios wt.% And operating characteristics are established experimentally and ensure the achievement of the technical result.

Example.

Bitumen 50-80 wt.% And technical sulfur 20-50 wt.% (All of the weight of the sulfur-bitumen binder) are loaded into the reactor and heated to 140 ° C. After that, the mixer is turned on, with constant stirring, the cationic-adhesive additive KAP and the anti-ice additive Grikol are added to the reactor, then the components are mixed for 10-15 minutes. The temperature range was established experimentally. Then the heated, uniformly mixed mineral-organic composite is fed by a metering pump to the inlet of the colloid mill. The solvent (aromatic hydrocarbons or their mixtures) and the curing modifier acetone, which are pre-mixed in the stated ratio, are also fed to the input of the colloid mill with a metering pump from the feed hopper. The finished mineral-organic composite is pumped into the finished product storage tank.

The proposed mineral-organic composite for the protection of road surfaces, made according to the presented method, provides:

1. High adhesion to the treated coating;

2. Highly resistant to all weather conditions, including UV rays.

3. Manufacturability of laying the mineral-organic composite by minimizing the time of its curing on the coating up to 30-90 minutes, a wide range of air temperatures during laying from 0 ^p C to +40 ^p C.

4. Easy distribution of the mineral-organic composite on the road surface.

5. Obtaining a road surface with anti-icing properties, on which ice does not form, with a temperature fluctuation of about 0 ^p C to -70 ^p C.

The test results of protective compositions for the main quality indicators on cement concrete and asphalt concrete are shown, respectively, in Tables 1 and 2.

Table 1. Test results of protective compositions for the main quality indicators on cement concrete.

Indicator name NTD for testing Control Processed Adhesion to concrete surface, MPa
before the MRZ test / after the MRZ test GOST 28574-90 - 3.5 / 2.0 Water absorption,% by weight: after 1 day / after 15 days. GOST 12730.3-78 0.95 / 4.6 0.31 / 1.73 Moisture suction, on the 15th day,% by weight - 0.69 0.20 Frost resistance: weight loss,% GOST 10060.2-2012 200 cycles
3.31 200 cycles
0.20 Coefficient of adhesion of the treated dry / wet surface Benefit to SNiP 3.06.03-85
Appendix 6 0.520 /
0.443 0.540 /
0.451 Sorption moisture,% by weight GOST 12852.6-77 1,2 0.75 Continuity of protective film after 200 MRZ cycles
+ there is boiling
- no effervescence _ + _

Table 2. Test results of protective compositions for the main quality indicators on asphalt concrete.

Indicator name NTD for testing Control Processed Adhesion to a / concrete surface at 0 ⁰ С, MPa GOST 28574 - Gap on a / b 3.2 Water saturation in
% by volume, cuttings from the finished coating, no more GOST 12801-98 3.0 2.1 Coefficient of adhesion of a / b surface treated with a protective composition (wet surface) Benefit to SNiP 3.06.03-85
Appendix 6 0.40 0.44 Continuity of protective film after 50 MRZ cycles
+ there is boiling
- no effervescence _ + _

Claims (5)

1. The method of obtaining a mineral-organic composite consists in the fact that a sulfur-bitumen binder: bitumen 50-80 wt. %, technical sulfur 20-50 wt. % - all of the mass of the sulfur-bitumen binder, loaded into the reactor, heated to 140 ° C, the sulfur-bitumen binder is 45-55 wt. % of the mineral-organic composite, after which the stirrer is turned on and, with constant stirring, an adhesion additive KAP 1.5-4 wt. %, then stirred for 10-15 minutes, then a heated, uniformly mixed mineral-organic composite is fed by a metering pump to the input of a colloid mill, to which a curing modifier acetone - 4-6 wt. % and solvent - aromatic hydrocarbons or their mixtures - the rest is up to 100%. 2. The method according to p. 1, characterized in that after turning on the mixer with constant stirring, add anti-icing additive Grikol - 4-8 wt. % over 100%. 3. Mineral-organic composite for road surface protection device, including the specified sulfur-bitumen binder, solvent, curing modifier, adhesive additive in the ratio, wt. %: bituminous binder 45-55 adhesive additive KAP 1.5-4 curing modifier acetone 4-6 solvent - aromatic hydrocarbons or mixtures thereof rest 4. Mineral-organic composite according to claim 3, characterized in that it additionally contains anti-icing additive Grikol - 4-8 wt. % over 100%.