CN111675508A - Preparation method of anti-skid and wear-resistant colored asphalt concrete - Google Patents
Preparation method of anti-skid and wear-resistant colored asphalt concrete Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00362—Friction materials, e.g. used as brake linings, anti-skid materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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Abstract
The invention discloses a preparation method of antiskid and wear-resistant colored asphalt concrete, which comprises the following three steps: firstly, putting steel slag, broken stone, asphalt and mineral powder into a mixing pot in sequence and proportion, mixing, compacting and forming to prepare steel slag concrete; secondly, epoxy resin, curing agent, rock asphalt and TiO are mixed2The colorant, the diluent, the water, the dispersant and the emulsifier are uniformly stirred in sequence and proportion to prepare the color spraying; finally, a colored epoxy coatingAnd spraying the mixture on the surface of the asphalt concrete. The color asphalt concrete prepared by the invention obviously improves the performances of skid resistance, wear resistance and color retention, and has good application effect on special road sections such as public transport special roads and the like.
Description
Technical Field
The invention relates to preparation of anti-skid and wear-resistant colored asphalt concrete, and belongs to the field of road engineering.
Background
Colored asphalt pavement is constructed on special road sections such as public transport special roads, road intersections, landscape roads and the like, and the functions of traffic guidance and landscape beautification are achieved. The types of colored asphalt pavement in the domestic market are mainly divided into two types: decolouring (coloured asphalt) and mixing (coloured spray coating.)[1]. Decolorizing processThe color asphalt is a cementing material prepared by blending and modifying chemical materials such as petroleum resin, SBS modifier and the like, and the prepared color asphalt has the advantages of high raw material cost, large consumption, complex processing procedure and high processing cost; the mixing process refers to that the spraying agent is sprayed on the road surface to change the color of the road surface, and the tracking observation of the colored pavement adopting the mixing process finds that: colored pavement has poor performance in slip resistance, abrasion resistance, and color retention. The reason is as follows: first, the color spray coatings currently on the market incorporate carbon black, which is commonly used as a lubricant in coatings that reduces the slip resistance of the colored pavement. Secondly, the sprayed color pigment fills up the open gap of the road surface, reduces the road surface construction depth and further reduces the road surface skid resistance. Finally, the polishing value of the stone is small, the texture structure on the surface of the stone is polished in the road using process, and the color spraying is also worn and lost, so that the color pavement spraying loss is serious, and the color retention is poor. The technical defects of the color asphalt and the color spraying are gradually the scaling problems of the color paving industry[2]。
At present, color asphalt paint in domestic market, such as part of water-based epoxy paint, not only needs to grind part of components, but also needs to filter part of components by a screen, so that the preparation procedures are increased, and the cost is increased.
The invention uses rock asphalt to replace carbon black in the traditional color asphalt and uses steel slag to replace part of coarse aggregate, so as to form the preparation method of the antiskid and wear-resistant color asphalt concrete.
Reference documents:
1. research on Zhangyi Yangxue Wu Li newspaper, Rowangqu Huang Wanli spray quick-setting type colored emulsified asphalt and waterproof paint thereof [ J ] China building waterproof, 2017(10):1-4.
2. Billows, high performance color micro-surfacing development and performance research [ D ] Chongqing traffic university, 2018.
Disclosure of Invention
The invention aims to provide a preparation method of anti-skid and wear-resistant colored asphalt concrete, which aims to solve the problem that the existing colored pavement is insufficient in wear resistance and skid resistance.
In order to solve the problems, the technical scheme of the invention is as follows: the preparation method of the anti-skid and wear-resistant colored asphalt concrete is characterized by comprising the following steps:
A. preparing an asphalt concrete raw material. The asphalt concrete comprises the following raw materials in parts by weight, calculated by 100 parts of the total weight: 5-7 parts of asphalt, 5-63 parts of steel slag, 25-75 parts of crushed stone and 7-11 parts of mineral powder, wherein the content of free calcium oxide in the steel slag is lower than 3%, the water absorption is lower than 3%, and the particle size range is 5-10 mm.
B. And preparing the asphalt concrete. Heating the asphalt to 160-170 ℃, and curing for 4-6 hours; the temperature of the stone material is raised to 170 ℃ and 180 ℃, the temperature of the steel slag is raised to 180 ℃ and 200 ℃, and the maintenance is carried out for 5 to 8 hours; the temperature of the stirring pot is in the range of 175 ℃ and 185 ℃. Placing the crushed stone, the steel slag, the asphalt and the mineral powder in a mixing pot in sequence to prepare a steel slag asphalt mixture, wherein the components are added each time and are stirred for at least 90 s.
C. And (3) preparing the colored coating. The color coating comprises the following raw materials in parts by weight based on 100 parts by weight: 30-40 parts of epoxy resin, 25-30 parts of curing agent, 1-3 parts of rock asphalt and TiO220-30 parts of colorant 2-10 parts of diluent 6-10 parts of water 5-10 parts of dispersant 4-6 parts of emulsifier 0.2-2.0 parts of asphalt, wherein the ash content is not higher than 15%, the fineness is not lower than 200 meshes, and the epoxy resin and the diluent are selected and mixed for 10-15min by a dispersion machine or a stirrer at the speed of 600 revolutions per minute of 200-; adding dispersant, emulsifier, rock asphalt and TiO into water2The colorant is dispersed at a high speed of 1300-1800 rpm for 15-30min, and then the curing agent is dispersed at a speed of 600-800 rpm for 5-10 min.
D. Uniformly smearing and scraping the prepared coating on the well-maintained steel slag asphalt pavement by using a special toothed harrow, wherein the coating amount is 1.1-2.0kg/m2And curing the colored pavement.
Further, adding dispersant, emulsifier, rock asphalt and TiO into water2And when the coloring agent is uniformly stirred, controlling the temperature to be 55-75 ℃.
Further, the steel slag is electric furnace slag or converter slag.
Furthermore, the asphalt adopts modified SBS, and the mixing amount of SBS modifier is not less than 4%.
Furthermore, the crushed stone with the grade of 0-3mm is limestone, the crushed stone with the grade of 3-10mm is basalt or diabase, the crushing value is not higher than 26%, and the needle sheet content is not higher than 15%.
Furthermore, the curing time of the epoxy resin is not more than 2h, and the strength of the cured epoxy resin is not less than 12 MPa.
Further, porosity tests are performed on the prepared composite material after preparation, and the recommended range is 3.0% -4.5%.
The anti-skid and wear-resistant colored asphalt concrete has the following advantages:
1. the anti-skid performance is strong. The steel slag has obvious angularity, and a certain amount of steel slag is mixed into the asphalt concrete, so that the construction depth of the pavement is increased, and the skid resistance of the colored asphalt pavement is improved; the use of rock asphalt instead of carbon black avoids the adverse effect of carbon black on slip resistance.
2. The wear resistance is strong. The steel slag has a burnishing value ranging from 60 to 70, basalt has a burnishing value of about 45 to 60, and limestone has a burnishing value of about 30 to 55. The steel slag with larger polishing value is doped as the coarse aggregate, so that the friction coefficient of the pavement is improved, and the friction coefficient is not obviously attenuated along with the increase of the service life of the pavement, thereby effectively ensuring the anti-skid performance of the pavement within the service life.
3. The color retention capability is strong. There are three main reasons for this: (1) the steel slag surface is porous, the specific surface area is large, the physical adsorption capacity is good, and more spraying pigment is adsorbed in pores on the steel slag surface. (2) The steel slag grinding value is higher than that of common stone, the surface texture structure is not easy to wear, the probability of the fading phenomenon of the pavement caused by stone wear is reduced, and the color retention capability of the colored asphalt pavement is improved. (3) In colour coatings, rock asphalt and TiO2And the colorant is used for toning together. The rock asphalt is an asphalt substance generated by petroleum through deposition and change for hundreds of millions of years under the comprehensive action of heat, pressure, oxidation, catalysts, bacteria and the like, has stable chemical components and does not change color obviously under the action of light and oxygen. Therefore, compared with carbon black, the color retention capability of the rock asphalt is stronger, and the color stability of the coating and the color retention capability of the colored asphalt pavement are improved.
4. The material cost is low. The steel slag is used as an industrial waste, has rich raw materials and low price, can reduce the road construction cost when being applied to road engineering, simultaneously solves the problems of environmental pollution and land occupation caused by the steel slag, and has great social benefit and economic benefit.
5. The equipment required by the invention is simple. The preparation method does not need to adopt new equipment and new technology, and can fully utilize the equipment in the prior art to realize the preparation of the anti-skid and wear-resistant colored asphalt mixture.
Detailed Description
Example 1
To demonstrate the feasibility of the present invention, an embodiment of a slip-resistant, wear-resistant colored asphalt concrete is provided herein.
Step one, preparing a steel slag asphalt mixture. Preparing the following raw materials in parts by weight, based on 100 parts by weight: 5 parts of asphalt, 28 parts of steel slag, 58 parts of crushed stone (20 parts of 0-3mm crushed stone, 10 parts of 3-5mm crushed stone and 28 parts of 5-10mm crushed stone) and 9 parts of mineral powder. Wherein the asphalt is SBS asphalt; screening the electric furnace slag with the particle size of 5-10mm by using a shaking and drying method; the crushed stone of 0-3mm is limestone, and the crushed stone of 3-5mm and the crushed stone of 5-10mm are basalt. Heating the asphalt to 160-170 ℃, and curing for 4-6 hours; the temperature of the stone material is raised to 170 ℃ and 180 ℃, the temperature of the steel slag is raised to 180 ℃ and 200 ℃, and the maintenance is carried out for 5 to 8 hours; and heating the stirring pot to 175-185 ℃, and sequentially adding stone materials, steel slag, asphalt and mineral powder to prepare the steel slag asphalt mixture, wherein the stirring is carried out for 90s after each raw material is added.
And step two, forming the steel slag asphalt mixture. And paving the prepared mixture into a rut plate, and rolling and forming by using a rut plate forming instrument, wherein the positive pressure is carried out for 2 times, the back pressure is carried out for 18 times, and then the mixture is maintained at normal temperature for more than 48 hours.
And step three, preparing the color coating. The color coating is prepared from the following raw materials in parts by weight, based on 100 parts by weight: 30 parts of epoxy resin, 28 parts of epoxy resin curing agent, 2 parts of rock asphalt and 22 parts of TiO25 parts of iron oxide blue, 8 parts of a diluent (butyl glycidyl ether), 5 parts of water, 4 parts of a dispersing agent and 1 part of an emulsifying agent.
Step four, special useUniformly smearing and scraping the prepared coating on a well-maintained steel slag asphalt concrete sample by using a toothed harrow, wherein the coating amount is 1.5kg/m2And curing the colored pavement.
Example 2
In order to verify the anti-skid performance of the anti-skid and wear-resistant colored asphalt concrete, BPN (Business process network) determination is needed, namely, a pendulum instrument is used for evaluating the anti-skid performance of the pavement, wherein the larger the BPN is, the stronger the anti-skid capability of the pavement is, and the smaller the BPN is, the weaker the anti-skid capability of the pavement is. First, referring to example 1, a skid-resistant and wear-resistant colored asphalt concrete and a general colored asphalt concrete were formed, wherein the crushed stones of 5-10mm of the general colored asphalt concrete were basalt crushed stones, and 2% of carbon black was used in the coating without steel slag and rock asphalt being added. And secondly, BPN measurement is carried out according to a pendulum instrument measurement road surface friction coefficient test method in highway subgrade and road surface on-site test regulations (JJG E60), and the difference of the anti-skid capacity is compared. Finally, the difference between the common asphalt concrete and the color asphalt concrete is shown in table 1, and the BPN swing value result is shown in table 2.
TABLE 1 comparison of two colored asphalt concrete compositions
| Color asphalt concrete variety | Difference of asphalt concrete | Difference of coating |
| Antiskid and wear-resistant colored asphalt concrete | The coarse aggregate is steel slag and broken stone | Doped with rock asphalt |
| Common color asphalt concrete | The coarse aggregate is macadam | Incorporating carbon black |
TABLE 2 BPN pendulum test results
| Test number | Antiskid and wear-resistant colored asphalt concrete | Common color asphalt concrete |
| 1 | 63.0 | 51.0 |
| 2 | 64.0 | 50.0 |
| 3 | 63.0 | 51.0 |
| Average | 63.3 | 50.7 |
As shown in Table 2, the BPN of the colored asphalt concrete of the invention is 63.3, which is greater than the BPN of the common colored asphalt concrete of 50.7, and the BPN is improved by about 24.9%. The reason is that the steel slag has obvious edges and corners, and a certain amount of steel slag is mixed into the asphalt concrete, so that the construction depth of the pavement is increased, and the skid resistance of the colored asphalt pavement is improved; the use of rock asphalt instead of carbon black avoids the adverse effect of carbon black on slip resistance.
Example 3
In order to verify the wear resistance of the anti-skid and wear-resistant colored asphalt concrete, the anti-skid and wear-resistant colored asphalt concrete and the common colored asphalt concrete formed in example 2 are used for comparison tests, wherein rutting tests (with the temperature of 20 ℃ and the compaction time of 2h) are carried out by referring to a rutting test method of asphalt mixture in test regulations of road engineering asphalt and asphalt mixture (JTG E20-2011), BPN (point-to-point) tests are carried out by referring to a test method for measuring the friction coefficient of a road surface by a pendulous instrument in test regulations of road subgrade and road surface (JJG E60), and the difference of the anti-skid capacities after the rutting is abraded is compared. The following table shows the test results.
TABLE 3 test results of BPN pendulum values after rut wear
As can be seen from Table 3, the BPN of the anti-skid and wear-resistant colored asphalt concrete of the invention is always higher than that of the common colored asphalt concrete without steel slag; the BPN is in a descending trend along with the increase of the test times, the descending trend is smaller and smaller, and the BPN descending amplitude of the anti-sliding and wear-resistant colored asphalt concrete is lower than that of a common colored asphalt mixture without steel slag. This is because the polishing value of the steel slag is greater than that of general stones. The steel slag is doped as the coarse aggregate, so that the BPN index of the pavement is improved, and the BPN decays slowly along with the increase of the service life of the pavement.
Example 4
In order to verify the color retention capability of the anti-skid and wear-resistant colored asphalt concrete, the anti-skid and wear-resistant colored asphalt concrete and the common colored asphalt concrete formed in example 2 are used for comparison tests, and the rutting tests (with the temperature of 20 ℃ and the compaction time of 2 hours) are carried out by referring to the rutting test method of asphalt mixture in road engineering asphalt and asphalt mixture test regulations (JTG E20-2011), so that the abrasion effect of wheel load on the colored asphalt concrete is simulated. And analyzing the wear rate of the color sprayed asphalt concrete with the skid resistance and the wear resistance and the color sprayed asphalt concrete with the common color after the rut is worn by adopting image processing software Photoshop.
Photoshop characterization of wear rates comprises the following steps
Step one, shooting a wheel pressure trace area. And taking out the test piece, placing the test piece on a flat ground, and clearly shooting the wheel pressure trace of the rut instrument. It should be noted that: when two wheel pressure traces are shot, the positions and light rays shot twice are ensured to be consistent, and pixel reading is prevented from being influenced.
And step two, calculating the pixel by using Photoshop. Guiding the wheel pressure trace photo into Photoshop software, identifying worn pixels and total pixels in the photo, wherein the ratio of the worn pixels to the total pixels is the wear rate
And step three, repeating the step one to the step two to obtain data after 1-3 times of track abrasion, and listing the data in a table 4.
TABLE 4 wear rates of anti-skid, wear-resistant color concrete and ordinary color concrete
As shown in Table 4, the wear rate of the anti-skid and wear-resistant color concrete is within the range of 0.01-0.09%, the wear rate of the common color concrete is within the range of 0.29-0.95%, the wear rate of the anti-skid and wear-resistant color concrete is significantly lower than that of the common color concrete, and the wear rate of the anti-skid and wear-resistant color concrete is only 3.4-9.5% of that of the common color concrete. The steel slag has porous surface, large specific surface area and better physical adsorption capacity, and more spraying pigment is adsorbed in pores on the steel slag surface; the grinding value of the steel slag is higher than that of common stone, the texture structure of the surface is not easy to wear, the probability of the color fading phenomenon of pavement caused by stone wear is reduced, and the color retention capability of the colored asphalt pavement is improved.
Example 5
In order to verify that the cost of raw materials of the anti-slip and wear-resistant colored asphalt concrete of the present invention is low, the anti-slip and wear-resistant colored asphalt concrete formed in example 2 and the common colored asphalt concrete are compared, and the following table shows the prices of the raw materials.
TABLE 5 price list of raw materials
| Raw material | Price (Yuan/t) | Raw material | Price (Yuan/t) |
| Steel slag | 50 | Polyamide 115 | 19000 |
| Crushed stone 0-3mm | 125 | Rock asphalt | 2200 |
| Crushed stone 3-6mm | 150 | Carbon black | 7000 |
| Crushed stone of 5-15mm | 166 | TiO2 | 23500 |
| SBS asphalt | 5104 | Colorant (iron oxide blue) | 3800 |
| Mineral powder | 352 | Butyl glycidyl ether | 20000 |
| E-20 epoxy resin | 32000 | Water (W) | 3.45 |
| Emulsifier | 80000 | Dispersing agent | 84000 |
The raw material proportions of the anti-skid and wear-resistant colored asphalt concrete and the common colored asphalt concrete are shown in example 1 and example 2, and the densities of the anti-skid and wear-resistant colored asphalt concrete and the common colored asphalt concrete are 2.647t/m respectively3And 2.464t/m3. The thickness of the surface layer is 3cm, and the coating amount of the color coating is 1.5kg/m2And calculating and comparing the price difference of the two color asphalt mixture raw materials. Table 6 shows the comparison of the raw material price difference.
TABLE 6 price difference table for raw materials of anti-skid and wear-resistant colored asphalt concrete and common colored asphalt concrete
| Price (Yuan/m)2) | Anti-skid and wear-resistant colored asphaltConcrete and its production method | Common color asphalt concrete | Saving cost |
| Coating material | 38.7 | 38.9 | 0.5％ |
| Mixture material | 24.5 | 30.0 | 18.3％ |
| Total price | 63.2 | 68.9 | 8.3％ |
In conclusion, the price difference of the coating of the anti-skid and wear-resistant colored asphalt concrete and the common colored asphalt concrete is smaller and is 0.5 percent, because the price difference of the carbon black and the rock asphalt is larger, the ratio of the carbon black to the rock asphalt in the two colored asphalt mixtures is too small, and thus, no obvious advantage exists in price; the price difference of the mixture is obvious and is 18.3 percent, because the consumption of the steel slag in the anti-skid and wear-resistant colored asphalt concrete is large, and the steel slag is used as an industrial waste and has low price, so the price difference of the mixture is obvious; in general, compared with the traditional color-sprayed asphalt pavement, the color asphalt mixture pavement saves 8.3 percent, and the cost is obviously saved.
The anti-skid and wear-resistant colored asphalt concrete provided by the invention has the advantages that the anti-skid performance, the wear resistance and the color retention performance are obviously improved, and the application value is very good.
Claims (9)
1. The preparation method of the anti-skid and wear-resistant colored asphalt concrete is characterized by comprising the following steps:
A. preparing an asphalt concrete raw material: the asphalt concrete comprises the following raw materials in parts by weight, calculated by 100 parts of the total weight: 5-7 parts of asphalt, 5-63 parts of steel slag, 25-75 parts of crushed stone and 7-11 parts of mineral powder, wherein the content of free calcium oxide in the steel slag is lower than 3%, the water absorption is lower than 3%, and the particle size range is 5-10 mm;
B. placing the crushed stone, the steel slag, the asphalt and the mineral powder in a mixing pot in sequence to prepare a steel slag asphalt mixture;
C. spreading and rolling the prepared mixture;
D. and (3) preparing the colored coating. The color coating comprises the following raw materials in parts by weight based on 100 parts by weight: 30-40 parts of epoxy resin, 25-30 parts of curing agent and TiO220-30 parts of rock asphalt, 1-3 parts of rock asphalt, 2-10 parts of a colorant, 6-10 parts of a diluent, 5-10 parts of water, 4-6 parts of a dispersant and 0.2-2.0 parts of an emulsifier, wherein the ash content of the rock asphalt is not higher than 15%, the fineness of the rock asphalt is not lower than 200 meshes, and firstly, the epoxy resin and the diluent are selected and uniformly stirred for later use; secondly, adding a dispersant, an emulsifier, rock asphalt and TiO into water2Stirring the coloring agent uniformly; thirdly, adding a curing agent into the aqueous solution to be uniformly dispersed; finally, uniformly mixing the aqueous solution with epoxy resin and a diluent;
E. uniformly coating and scraping the prepared paint on the well-maintained steel slag asphalt pavement by using a special toothed harrow, wherein the coating amount of the color paint is 1.5-2.0kg/m2And curing the colored pavement.
2. The anti-slip and wear-resistant colored asphalt concrete according to claim 1, wherein before the preparation of the asphalt mixture, the temperature of the asphalt is raised to 160-170 ℃, and the asphalt is cured for 4-6 hours; the temperature of the stone material is raised to 170 ℃ and 180 ℃, the temperature of the steel slag is raised to 180 ℃ and 200 ℃, and the maintenance is carried out for 5 to 8 hours; the temperature of the stirring pot is in the range of 175 ℃ and 185 ℃.
3. The slip-resistant, wear-resistant colored asphalt concrete according to claim 1, wherein the color is selected from the group consisting ofIn the epoxy coating, epoxy resin and diluent are mixed for 10-15min by a dispersion machine or a stirrer at the speed of 200-600 r/min, and water, a dispersing agent, an emulsifying agent, rock asphalt, TiO and the like are added2The colorant is dispersed at a high speed of 1300-1800 rpm for 15-30min, and then the curing agent is added to be dispersed at a speed of 600-800 rpm for 5-10 min.
4. The slip-resistant, abrasion-resistant colored asphalt concrete according to claim 1, wherein said colored epoxy coating is prepared by adding a dispersant, an emulsifier, rock asphalt, TiO, etc. to water2And when the coloring agent is uniformly stirred, controlling the temperature to be 55-75 ℃.
5. The slip-resistant wear-resistant colored asphalt concrete according to claim 1, wherein the steel slag is electric furnace slag or converter slag.
6. The method of claim 1, wherein the asphalt concrete has a porosity in the range of 3.0% to 4.5%.
7. The slip-resistant wear-resistant colored asphalt concrete according to claim 1, wherein the asphalt is modified SBS, and the mixing amount of SBS modifier is not less than 4%.
8. The skid and wear resistant colored asphalt concrete according to claim 1, wherein the crushed stone is limestone in the 0-3mm grade and basalt or diabase in the 3-10mm grade, and the crushing value is not more than 26% and the needle chip content is not more than 15%.
9. The slip-resistant wear-resistant colored asphalt concrete according to claim 1, wherein the epoxy resin has a curing time of not more than 2 hours and a cured strength of not less than 12 MPa.
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