Unpowered cooling coating for ballastless track concrete and preparation method thereof

Abstract

The application discloses a ballastless track concrete non-powered cooling coating and a preparation method thereof, and belongs to the field of building materials.The application aims at solving the problem that the existing radiation cooling coating cannot be effectively applied to the surface of concrete.The ballastless track concrete non-powered cooling coating is composed of a mixture of water-based silane resin, titanium white powder, ceramic powder, glass chopped fiber and glass powder, hollow glass microbeads, silicate, phosphorus-doped silicon, activated carbon powder, an additive and deionized water; and the method comprises the following steps: I, weighing; II, dispersing the titanium white powder, the ceramic powder, the silicate, the phosphorus-doped silicon, the activated carbon powder and the deionized water; III, grinding and dispersing; IV, continuously dispersing after adding the additive; and V, continuously dispersing after adding the mixture of the water-based silane resin, the glass chopped fiber and the glass powder and the hollow glass microbeads.The application is used for the ballastless track concrete non-powered cooling coating and the preparation thereof.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building materials. BACKGROUND

[0002] At present, the maintenance work of ballastless track concrete is mainly to coat the surface of the concrete with concrete waterproof paint to avoid water vapor entering the interior of the concrete and destroying its structure. However, the traditional waterproof paint has a single performance and excessively focuses on the waterproof effect without cooling capacity. In view of the problem of excessively high temperature of the surface of the concrete, the current main method is to spray water or cover wet cloth on the surface of the concrete. However, this method consumes a lot of labor and cost, and cannot be realized in the southern tropical and subtropical regions with long high-temperature duration.

[0003] The existing radiation cooling paint is mainly applied to electric appliances, cabinets, electric wires and cables, heat pipes, textiles, industrial equipment, buildings, vehicles and the like, and there is no relevant report on the application of the radiation cooling paint to ballastless track concrete. As a concrete structure exposed to the natural environment, the ballastless track needs to bear not only the train load but also the temperature load. With the continuous intensification of the greenhouse effect, the surface temperature of the outdoor building gradually increases. Especially, the surface temperature of the ballastless track concrete reaches 70 DEG C in the high-temperature weather in summer. The excessively large temperature gradient between the surface and the interior of the concrete causes the shrinkage stress to exceed the bearing capacity of the concrete, which easily causes the problems of separation between the concrete layers, damage at the wide and narrow joints and uneven settlement and the like. Moreover, the temperature difference between day and night in the natural environment is large, and it is difficult to control the temperature gradient of the concrete during the day and at night, which causes an immeasurable loss to the maintenance work of the concrete, thereby limiting the application of the radiation cooling paint to the surface of the ballastless track concrete. SUMMARY

[0004] The present application aims to solve the problem that the existing radiation cooling paint cannot be effectively applied to the surface of the concrete, and further provides a ballastless track concrete unpowered cooling paint and a preparation method thereof.

[0005] A ballastless track concrete unpowered cooling paint, which is composed of 30-40 parts of water-based silane resin, 6-10 parts of titanium white powder, 5-10 parts of ceramic powder, 5-10 parts of a mixture of glass short-cut fiber and glass powder, 5-10 parts of hollow glass microbeads, 5-10 parts of silicate, 3-6 parts of phosphorus-doped silicon, 2-5 parts of activated carbon powder, 1-5 parts of an additive and 10-20 parts of deionized water.

[0006] A preparation method of a ballastless track concrete unpowered cooling paint, which is carried out according to the following steps:

[0007] I. The mixture of 30-40 parts of water-based silane resin, 6-10 parts of titanium dioxide, 5-10 parts of ceramic powder, 5-10 parts of glass short fiber and glass powder, 5-10 parts of hollow glass microbeads, 5-10 parts of silicate, 3-6 parts of phosphorus-doped silicon, 2-5 parts of activated carbon powder, 1-5 parts of auxiliary agent and 10-20 parts of deionized water is weighed;

[0008] II. The weighed titanium dioxide, ceramic powder, silicate, phosphorus-doped silicon, activated carbon powder and deionized water are sequentially added to the dispersion tank, and uniformly dispersed at a speed of 800-1000 r / min for 30-60 min;

[0009] III. The dispersion liquid after step II is placed in a high-speed oscillation grinder, and ground at a speed of 3000-4000 r / min for 60-80 min, and then placed in the dispersion tank again, and continuously dispersed at a speed of 800-1000 r / min for 30-60 min;

[0010] IV. The auxiliary agent is added to the dispersion tank, and continuously dispersed at a speed of 1000-3000 r / min for 30-80 min;

[0011] V. The mixture of water-based silane resin, glass short fiber and glass powder, and hollow glass microbeads are added to the dispersion tank, and continuously dispersed at a speed of 800-1000 r / min for 30-60 min to obtain the non-ballasted track concrete non-power cooling coating.

[0012] The beneficial effects of the present application are:

[0013] (1) The non-ballasted track concrete non-power cooling coating prepared by the present application can emit the heat on the coating surface to outer space in the form of infrared through the atmospheric window (8-13 μm), and has high solar reflectance, so that the coating on the concrete surface can reduce the temperature of the concrete surface.

[0014] (2) The non-ballasted track concrete non-power cooling coating prepared by the present application can simultaneously adjust the daytime and nighttime temperature gradient, control the maximum positive temperature gradient in daytime within 66℃ / m, and control the maximum negative temperature gradient in nighttime within -22℃ / m, so as to prevent cracks and settlement caused by excessive internal temperature gradient and shrinkage stress.

[0015] (3) The non-ballasted track concrete non-power cooling coating prepared by the present application has excellent waterproof performance and hydrophobic effect, and the water contact angle is more than 140°.

[0016] (4) The ballastless track concrete non-powered cooling coating prepared by the present invention has super weather resistance and can withstand artificial aging for more than 4000 hours. Detailed Implementation

[0017] Specific Implementation Method 1: This implementation method is a non-powered cooling coating for ballastless track concrete, which is composed of 30-40 parts by weight of water-based silane resin, 6-10 parts of titanium dioxide, 5-10 parts of ceramic powder, 5-10 parts of a mixture of chopped glass fibers and glass powder, 5-10 parts of hollow glass microspheres, 5-10 parts of silicate, 3-6 parts of phosphorus-doped silicon, 2-5 parts of activated carbon powder, 1-5 parts of additives, and 10-20 parts of deionized water.

[0018] The beneficial effects of this embodiment are:

[0019] (1) The ballastless track concrete non-powered cooling coating prepared in this embodiment can emit the heat on the coating surface into outer space in the form of infrared rays through the atmospheric window (8μm~13μm), and has a high solar reflectivity. When applied to the concrete surface, it can reduce the concrete surface temperature.

[0020] (2) The non-powered cooling coating for ballastless track concrete prepared in this embodiment can simultaneously regulate the daytime and nighttime temperature gradients, controlling the maximum positive temperature gradient during the daytime to within 66℃ / m and the maximum negative temperature gradient at nighttime to within -22℃ / m, preventing cracks, settlement and other problems caused by the shrinkage stress due to the excessive internal temperature gradient.

[0021] (3) The ballastless track concrete non-powered cooling coating prepared in this embodiment has excellent waterproof performance and hydrophobic effect, with a water contact angle of more than 140°.

[0022] (4) The ballastless track concrete non-powered cooling coating prepared in this embodiment has super weather resistance and can withstand artificial aging for more than 4000 hours.

[0023] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the aqueous silane resin is a mixture of DOWSIL 8016 and BS-43N, and the mass ratio of DOWSIL 8016 to BS-43N is (1-5):1. Everything else is the same as in Specific Implementation Method One.

[0024] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that the ceramic powder is one or a mixture of several of Al2O3, MgO, ZnO, SiO2, and ZrO2. Everything else is the same as in Specific Implementation Method One or Two.

[0025] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that: the mass ratio of chopped glass fibers to glass powder in the mixture of chopped glass fibers and glass powder is 1:(3-4); the aspect ratio of the chopped glass fibers is 7-15; and the particle size of the quartz powder is 3μm-5μm. Everything else is the same as in Specific Implementation Methods One to Three.

[0026] Specific Implementation Method Five: This implementation method differs from Specific Implementation Methods One to Four in that the silicate is one or a mixture of several of the following: iron silicate, potassium silicate, magnesium silicate, and aluminum silicate. Everything else is the same as in Specific Implementation Methods One to Four.

[0027] Specific Implementation Method Six: This implementation method differs from Specific Implementation Methods One to Five in that: in the phosphorus-doped silicon, P accounts for 2% to 4% of the total number of P and Si atoms. Everything else is the same as in Specific Implementation Methods One to Five.

[0028] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Methods One to Six in that the auxiliary agent is one or a mixture of several of the following: dispersant, defoamer, wetting agent, activator, leveling agent, and thickener. Everything else is the same as in Specific Implementation Methods One to Six.

[0029] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Methods One to Seven in that: the particle size of the titanium dioxide and ceramic powder is 20μm to 30μm; the particle size of the activated carbon powder is 100nm to 500nm; and the particle diameter of the hollow glass microspheres is 40μm to 60μm. Everything else is the same as in Specific Implementation Methods One to Seven.

[0030] Specific Implementation Method Nine: A method for preparing a non-powered cooling coating for ballastless track concrete, comprising the following steps:

[0031] 1. Weigh out 30-40 parts by weight of waterborne silane resin, 6-10 parts of titanium dioxide, 5-10 parts of ceramic powder, 5-10 parts of a mixture of chopped glass fibers and glass powder, 5-10 parts of hollow glass microspheres, 5-10 parts of silicate, 3-6 parts of phosphorus-doped silicon, 2-5 parts of activated carbon powder, 1-5 parts of additives, and 10-20 parts of deionized water.

[0032] 2. Weigh out titanium dioxide, ceramic powder, silicate, phosphorus-doped silicon, activated carbon powder, and deionized water and put them into a dispersion tank in sequence. Disperse them at a constant speed of 800 r / min to 1000 r / min for 30 min to 60 min.

[0033] 3. Place the dispersion obtained in step 2 into a high-speed vibrating mill and grind it for 60 min to 80 min at a speed of 3000 r / min to 4000 r / min. Then place it back into a dispersion tank and continue to disperse it for 30 min to 60 min at a speed of 800 r / min to 1000 r / min.

[0034] 4. Add the additive to the dispersion tank and continue to disperse for 30 min to 80 min at a rotation speed of 1000 r / min to 3000 r / min.

[0035] 5. Add the mixture of water-based silane resin, chopped glass fibers and glass powder and hollow glass microspheres into a dispersion tank, and continue to disperse for 30 min to 60 min at a rotation speed of 800 r / min to 1000 r / min to obtain a non-powered cooling coating for ballastless track concrete.

[0036] Specific Implementation Method Ten: This implementation method differs from Specific Implementation Method Nine in that the fineness after grinding in step three does not exceed 20μm. Everything else is the same as in Specific Implementation Method Nine.

[0037] The beneficial effects of the present invention are verified using the following embodiments:

[0038] Example 1:

[0039] A non-powered cooling coating for ballastless track concrete is composed of 40 parts by weight of water-based silane resin, 10 parts of titanium dioxide, 7 parts of ceramic powder, 5 parts of a mixture of chopped glass fibers and glass powder, 6 parts of hollow glass microspheres, 7 parts of silicate, 6 parts of phosphorus-doped silicon, 3 parts of activated carbon powder, 2.8 parts of additives and 14 parts of deionized water.

[0040] The aqueous silane resin is a mixture of DOWSIL 8016 and BS-43N, and the mass ratio of DOWSIL 8016 to BS-43N is 4:1.

[0041] The ceramic powder mentioned is MgO.

[0042] The mass ratio of chopped glass fibers to glass powder in the mixture of chopped glass fibers and glass powder is 1:3; the aspect ratio of the chopped glass fibers is 12; and the average particle size of the quartz powder is 3 μm.

[0043] The silicate mentioned is aluminum silicate.

[0044] In the phosphorus-doped silicon, P accounts for 3% of the total number of P and Si atoms.

[0045] The additives are a mixture of BYK-190 dispersant, BYK088 defoamer, TEGO-245 wetting agent, BYK333 leveling agent and 601 thickener.

[0046] The titanium dioxide and ceramic powder have an average particle size of 25 μm; the activated carbon powder has a particle size of 200 nm to 400 nm; and the hollow glass microspheres have an average particle diameter of 40 μm.

[0047] The preparation method of the above-mentioned non-powered cooling coating for ballastless track concrete is carried out according to the following steps:

[0048] 1. Weigh out 40 parts by weight of waterborne silane resin, 10 parts of titanium dioxide, 7 parts of ceramic powder, 5 parts of a mixture of chopped glass fibers and glass powder, 6 parts of hollow glass microspheres, 7 parts of silicate, 6 parts of phosphorus-doped silicon, 3 parts of activated carbon powder, 2.8 parts of additives and 14 parts of deionized water.

[0049] 2. Weigh out titanium dioxide, ceramic powder, silicate, phosphorus-doped silicon, activated carbon powder, and deionized water and put them into a dispersion tank in sequence. Disperse them at a constant speed for 45 minutes at a speed of 1000 r / min.

[0050] 3. Place the dispersion obtained in step 2 into a high-speed vibrating mill and grind it for 60 minutes at a speed of 4000 r / min. Then place it back into a dispersion tank and continue to disperse it for 30 minutes at a speed of 1000 r / min.

[0051] 4. Add BYK-190 dispersant, BYK088 defoamer, TEGO-245 wetting agent, and BYK333 leveling agent to the dispersion tank. Continue to disperse for 20 minutes at a speed of 2000 r / min. Then add 601 thickener and continue to disperse for 60 minutes at a speed of 3000 r / min.

[0052] 5. Add the mixture of water-based silane resin, chopped glass fibers and glass powder and hollow glass microspheres into a dispersion tank, and continue to disperse for 30 minutes at a speed of 1000 r / min to obtain a non-powered cooling coating for ballastless track concrete.

[0053] The fineness after grinding in step three should not exceed 20μm.

[0054] Example 1: The coating thickness of the non-powered cooling coating for ballastless track concrete is 150 μm.

[0055] Comparative Experiment 1: This comparative experiment differs from Example 1 in that the mixture of 6 parts phosphorus-doped silicon and 5 parts glass chopped fibers and glass powder is omitted. Everything else is the same as in Example 1.

[0056] Comparative Experiment 2: This comparative experiment differs from Example 1 in that 6 parts of phosphorus-doped silicon are omitted. Everything else is the same as in Example 1.

[0057] Comparative Experiment 3: This comparative experiment differs from Example 1 in that 10 parts of titanium dioxide, 7 parts of ceramic powder, 6 parts of hollow glass microspheres, and 7 parts of silicate are omitted. Everything else is the same as in Example 1.

[0058] Table 1

[0059]

[0060] Table 2

[0061]

Claims

1. A non-powered cooling coating for ballastless track concrete, characterized in that... It is composed of 30-40 parts by weight of waterborne silane resin, 6-10 parts of titanium dioxide, 5-10 parts of ceramic powder, 5-10 parts of a mixture of chopped glass fibers and glass powder, 5-10 parts of hollow glass microspheres, 5-10 parts of silicate, 3-6 parts of phosphorus-doped silicon, 2-5 parts of activated carbon powder, 1-5 parts of additives, and 10-20 parts of deionized water.

2. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The aqueous silane resin is a mixture of DOWSIL 8016 and BS-43N, and the mass ratio of DOWSIL 8016 to BS-43N is (1~5):

1.

3. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The ceramic powder is one or a mixture of several of Al2O3, MgO, ZnO, SiO2 and ZrO2.

4. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The mass ratio of chopped glass fibers to glass powder in the mixture of chopped glass fibers and glass powder is 1:(3~4); the aspect ratio of the chopped glass fibers is 7~15.

5. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The silicate is one or a mixture of several of the following: iron silicate, potassium silicate, magnesium silicate, and aluminum silicate.

6. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... In the phosphorus-doped silicon, P accounts for 2% to 4% of the total number of P and Si atoms.

7. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The additives are one or a mixture of several of the following: dispersants, defoamers, wetting agents, activators, leveling agents, and thickeners.

8. The non-powered cooling coating for ballastless track concrete according to claim 1, characterized in that... The titanium dioxide and ceramic powder have a particle size of 20μm to 30μm; the activated carbon powder has a particle size of 100nm to 500nm; and the hollow glass microspheres have a particle diameter of 40μm to 60μm.

9. The preparation method of the non-powered cooling coating for ballastless track concrete as described in claim 1, characterized in that... It is done in the following steps:

1. Weigh out 30-40 parts by weight of waterborne silane resin, 6-10 parts by weight of titanium dioxide, 5-10 parts by weight of ceramic powder, 5-10 parts by weight of a mixture of chopped glass fibers and glass powder, 5-10 parts by weight of hollow glass microspheres, 5-10 parts by weight of silicate, 3-6 parts by weight of phosphorus-doped silicon, 2-5 parts by weight of activated carbon powder, 1-5 parts by weight of additives and 10-20 parts by weight of deionized water; 2. Weigh out the titanium dioxide, ceramic powder, silicate, phosphorus-doped silicon, activated carbon powder, and deionized water and put them into a dispersion tank in sequence. Disperse them at a constant speed of 800 r / min to 1000 r / min for 30 min to 60 min.

3. Place the dispersion obtained in step 2 into a high-speed vibrating mill and grind it for 60 min to 80 min at a speed of 3000 r / min to 4000 r / min. Then place it back into a dispersion tank and continue to disperse it for 30 min to 60 min at a speed of 800 r / min to 1000 r / min.

4. Add the additive to the dispersion tank and continue to disperse for 30 min to 80 min at a rotation speed of 1000 r / min to 3000 r / min.

5. Add the mixture of water-based silane resin, chopped glass fibers and glass powder and hollow glass microspheres into a dispersion tank, and continue to disperse for 30 min to 60 min at a rotation speed of 800 r / min to 1000 r / min to obtain a non-powered cooling coating for ballastless track concrete.

10. The method for preparing a non-powered cooling coating for ballastless track concrete according to claim 9, characterized in that... The fineness after grinding in step three should not exceed 20μm.

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