CN116496028A - Asphalt mixture for repairing pavement pits in safe and environment-friendly severe cold region and preparation method thereof - Google Patents
Asphalt mixture for repairing pavement pits in safe and environment-friendly severe cold region and preparation method thereof Download PDFInfo
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- CN116496028A CN116496028A CN202210062988.9A CN202210062988A CN116496028A CN 116496028 A CN116496028 A CN 116496028A CN 202210062988 A CN202210062988 A CN 202210062988A CN 116496028 A CN116496028 A CN 116496028A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 122
- 239000000203 mixture Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000003208 petroleum Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 55
- 239000004575 stone Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 24
- 239000011707 mineral Substances 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000008439 repair process Effects 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims 1
- 239000002283 diesel fuel Substances 0.000 abstract description 9
- 238000000016 photochemical curing Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 10
- 238000009775 high-speed stirring Methods 0.000 description 7
- 239000003999 initiator Substances 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000010257 thawing Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
-
- 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
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/766—Low temperatures, but above zero
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a safe and environment-friendly asphalt mixture for repairing pavement pits in severe cold areas and a preparation method thereof, wherein the asphalt mixture comprises cold patch asphalt and aggregate, and the mass ratio of the cold patch asphalt to the aggregate is 4.4-4.9%. The cold patch asphalt comprises the following components in parts by weight: 2 to 2.5 parts of road petroleum asphalt, 2 to 2.5 parts of low-volatility low-pour point rubber oil, 0.3 to 0.6 part of TPO thermoplastic elastomer, 0.1 to 0.3 part of photo-curing resin and 0.001 to 0.01 part of photoinitiator. The asphalt mixture for repairing the pavement pits in the safe and environment-friendly severe cold region has good construction workability and high strength after solidification, can fully meet the requirements of treating the pavement pits in the cold region, does not contain diesel oil, greatly reduces the safety risk in the production, storage and transportation processes, has good comprehensive performance and has good market prospect.
Description
Technical Field
The invention belongs to the technical field of pavement maintenance, and particularly relates to a safe and environment-friendly asphalt mixture for repairing pavement pits in severe cold areas and a preparation method thereof.
Background
In road maintenance engineering, pit repair is an important working content. The repair of the pit on the road surface can be divided into a hot repair method and a cold repair method. Compared with the traditional hot patching method of hot and high temperature patching, the method of patching by adopting cold state materials at normal temperature or low temperature is cold patching, and the patching material used by the method is cold patching asphalt mixture, which is called cold patching material for short, and English is Cold Patch Asphalt Mixture.
At present, a plurality of cold feed production suppliers exist in China, and products are imported and produced in China. In general, the use effect of imported products is relatively good, but the price is relatively high, and the quality is not stable enough. In general, the contradiction between construction workability and durability for road use has not been solved. The produced cold patch material is hard, cannot be normally constructed under the low-temperature and normal-temperature climatic conditions, and is difficult to compact; or the service life of the repairing pit is too short, and the repairing pit can only be maintained for 2 and 3 months or even shorter after the repairing pit is not tested by rainwater. Especially for northern areas of China, the highest temperature in the daytime can reach 20 ℃ below zero in winter, but the current industry is lack of durable pit repairing materials which can be applied under the severe cold condition, and in order to realize the application under the severe cold condition, a part of enterprise products are added with a large amount of diesel oil in pit cold repairing materials, the diesel oil consumption can reach about 2% of the cold repairing materials, and although the workability of the materials under the severe cold low temperature condition is improved, the durability of the cold repairing materials is greatly reduced due to serious damage of the diesel oil to asphalt performance, and the pit is loosely damaged in a large area during the freezing and thawing period in spring. Meanwhile, the diesel oil has serious volatility, the mixing amount is good when the mixing amount is low, and when the mixing amount is high, the serious safety risk exists in the production process, so that the fire disaster is very easy to occur.
Disclosure of Invention
Aiming at the defects, the invention aims to provide the safe and environment-friendly asphalt mixture for repairing the pavement pits in the severe cold region, which is suitable for being used in the severe cold region and has good durability and does not need diesel oil, and the preparation method thereof.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: the asphalt mixture for repairing the pavement pit in the safe and environment-friendly severe cold region comprises cold patch asphalt and aggregate, wherein the mass ratio of the cold patch asphalt to the aggregate is 4.4-4.9%. The cold patch asphalt comprises the following components in parts by weight: 2 to 2.5 parts of road petroleum asphalt, 2 to 2.5 parts of low-volatility low-pour point rubber oil, 0.3 to 0.6 part of TPO thermoplastic elastomer, 0.1 to 0.3 part of photo-curing resin and 0.001 to 0.1 part of photoinitiator. The aggregate is a mixture of broken stone and mineral powder. The mixture of crushed stone and mineral powder meets the grading requirements of table 1 below.
TABLE 1
| Screen mesh, mm | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Upper limit, percent | 100 | 100 | 45 | 35 | 25 | 22 | 18 | 12 | 10 |
| Lower limit, percent | 100 | 85 | 25 | 20 | 15 | 12 | 8 | 6 | 4 |
As a preferable scheme of the invention, the road petroleum asphalt is preferably 110# heavy road petroleum asphalt as matrix asphalt, and the technical indexes are shown in the following table 2.
TABLE 2
As a preferable scheme of the invention, the pour point of the low-volatility low-pour point rubber oil is below-25 ℃ so as to ensure that the cold patch asphalt mixture can be normally constructed under severe cold conditions, and the technical indexes are shown in the following table 3:
TABLE 3 Table 3
As a preferable scheme of the invention, the TPO thermoplastic elastomer is a thermoplastic elastomer material with high oil filling rate and taking SEBS as a main material, can greatly improve the bonding strength of cold patch asphalt and crushed stone, improves the rain, snow and freeze thawing resistance of pit cold patch materials, and has very good low-temperature weather resistance, and the technical indexes are shown in the following table 4.
TABLE 4 Table 4
As a preferable embodiment of the present invention, the photocurable resin is preferably an acrylic photocurable resin such as 6104, SM6201, etc.
The photocuring resin has the main effects of ensuring good workability of pit cold-patch materials, having certain initial strength and avoiding the phenomenon that the cold-patch materials are pushed out of pit under the action of traffic load to influence the use effect.
The technical index of the photocurable resin is shown in table 5 below.
TABLE 5
As a preferred embodiment of the present invention, the photoinitiator is preferably a photoinitiator 1173 or a photoinitiator BP.
The photoinitiator has the main function of generating free radicals under the action of illumination to initiate polymerization of the reactive diluent and the light-cured resin and rapidly form strength.
As a preferable scheme of the invention, basalt or limestone macadam with good particle shape (round or square) and more edges and corners is preferably adopted, and the technical indexes are as shown in the following table 6:
TABLE 6
| Detecting items | Unit (B) | Technical requirements | Test method |
| Crushing value of stone | ％ | ≤20 | T 0316 |
| Polishing value | - | ≥42 | T 0321 |
| Los Angeles abrasion loss | ％ | ≤28 | T 0317 |
| Apparent relative density | - | ≥2.60 | T 0304 |
| Water absorption rate | ％ | ≤2.0 | T 0304 |
| Robustness of the product | ％ | ≤12 | T 0314 |
| Needle sheetShape content (mixture) | ％ | ≤12 | T 0312 |
| Water washing method<Particle content of 0.075mm | ％ | ≤0.8 | T 0310 |
| Soft stone content | ％ | ≤3 | T 0320 |
As a preferable scheme of the invention, the mineral powder is preferably ground by limestone, and meanwhile, certain particle size grading requirements are required, and the technical indexes are shown in the following table 7:
TABLE 7
The preparation method of the safe and environment-friendly pavement pit repairing asphalt mixture in severe cold areas comprises the following steps:
(1) Preparing cold patch asphalt: heating the road petroleum asphalt to 140-150 ℃, adding TPO thermoplastic elastomer material, starting a high-speed stirring device, stirring at a speed of more than 3000rpm for 5-20 minutes, so that the TPO thermoplastic elastomer can be fully melted and dispersed in the road petroleum asphalt; then stopping heating, adding low-volatility low-pour point rubber oil, reducing the temperature to 80-100 ℃, adding light-cured resin, continuously stirring and reducing the temperature, adding a photoinitiator and uniformly stirring when the temperature is reduced to be lower than 40 ℃, and obtaining cold-patch asphalt, wherein the cold-patch asphalt is preferably preserved in a dark place;
(2) Preheating crushed stone to 30-70 ℃, preheating cold patch asphalt to 60-90 ℃, sequentially adding the weighed crushed stone and the cold patch asphalt into a stirring pot, stirring for 5-30 seconds, then adding mineral powder, and stirring for 20-60 seconds to prepare the safe and environment-friendly pavement pit repairing asphalt mixture in severe cold areas. The asphalt mixture for repairing the pavement pits in the safe and environment-friendly severe cold region is preferably packaged and stored by adopting a sealed and light-tight outer package.
The beneficial effects of the invention are as follows: the pavement pit repairing asphalt mixture provided by the invention has the advantages that the formula meter is reasonable, the construction workability is good, the strength after solidification is high, the requirements of pavement pit disease treatment in cold areas can be fully met, the cold repairing asphalt does not contain diesel oil, the safety risk in the production, storage and transportation processes is greatly reduced, the market prospect is good, and the concrete advantages are as follows:
1. the asphalt mixture for repairing the pavement pits in the safe and environment-friendly severe cold region uses the rubber oil with low pour point and high flash point to replace the traditional diesel oil, so that the safety of each link of production, storage and transportation is greatly improved;
2. the safe and environment-friendly asphalt mixture for repairing the pavement pits in the severe cold region can be used under severe cold conditions, and has good construction operation performance at the temperature of more than 18 ℃ below zero in consideration of the fact that the average minimum temperature in the daytime in winter in the severe cold region of China is not lower than-15 ℃;
3. the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region has strong water loss resistance, fully considers the risk of freeze thawing in winter and spring alternation in the severe cold region of China, and greatly improves the freeze thawing resistance of the material;
4. the pavement pit repairing asphalt mixture for the safe and environment-friendly severe cold region has reasonable strength. The workability and strength of the cold feed are contradictory and must be compatible. The safe and environment-friendly severe cold region pavement pit repairing asphalt mixture is stored in the airtight and opaque package, when the safe and environment-friendly severe cold region pavement pit repairing asphalt mixture is used, the package is opened, and the safe and environment-friendly severe cold region pavement pit repairing asphalt mixture is immediately poured into the pit, so that the safe and environment-friendly severe cold region pavement pit repairing asphalt mixture has good workability, only needs manual simple rolling, the light-cured resin gradually plays a curing role, the surface layer cold-patch strength is gradually formed, and the deep cold-patch is slow in strength formation due to no light effect, so that the cold-patch is better combined with the bottom of the pit. After aging and curing for about ten days, the asphalt mixture for repairing the pavement pits in the safe and environment-friendly severe cold region is finally stable, and the strength equivalent to that of the original pavement is realized. The invention adopts photo-curing resin, has small dosage, low reaction speed and low strength, avoids too fast formation and too high strength of cold patch produced by adopting reaction curing technical routes in the current market, forms huge strength difference with asphalt pavement around pits, leads to premature breakage of materials at contact positions, and prolongs the service life.
The invention will be further illustrated with reference to examples.
Detailed Description
Example 1: in other embodiments, 90# heavy road petroleum asphalt, 130# heavy road petroleum asphalt or 160# heavy road petroleum asphalt can be used. Heating 400g of petroleum asphalt for a 110# heavy traffic road to 140 ℃, adding 120g of TPO, starting a high-speed stirring device, stirring at 3000rpm for 10min, keeping the temperature between 140+/-5 ℃, adding 500g of rubber oil into the mixture, stirring uniformly, adding 6104-10 g of photo-curing resin when the temperature is reduced to 80-100 ℃, stirring uniformly, adding 11730.2g of photo-initiator when the temperature is reduced to below 40 ℃, stirring uniformly, sealing and shading, and preserving to obtain the 1# cold-patch asphalt.
And weighing the cold patch asphalt 1# and the aggregate according to the mass ratio of the cold patch asphalt 1# to the aggregate of 4.5%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone and cold patch asphalt No. 1 in aggregate to 60 ℃, sequentially adding the broken stone and the cold patch asphalt No. 1 into a stirring pot, stirring for 10s, adding mineral powder in aggregate, stirring until the mixture is uniform and free of patterns, and sealing and keeping the mixture away from light to obtain the cold patch material No. 1, namely the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
Example 2. Heating 400g of 110# heavy road petroleum asphalt to 150 ℃, adding 50g of TPO, starting a high-speed stirring device, stirring at 4000rpm for 15min, keeping the temperature between 150+/-5 ℃, adding 500g of rubber oil, stirring uniformly, cooling to 80-100 ℃, adding 610420g of photo-curing resin, stirring uniformly, cooling to below 40 ℃, adding 1.8g of photo-initiator BP, stirring uniformly, sealing and shading, and preserving to obtain the cold-patch asphalt No. 2.
And weighing the cold-patch asphalt 2# and the aggregate according to the mass ratio of the cold-patch asphalt 2# to the aggregate of 4.4%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone in aggregate to 50 ℃, heating cold patch asphalt No. 2 to 70 ℃, sequentially adding the broken stone and the cold patch asphalt into a stirring pot, stirring for 10s, adding mineral powder in aggregate, stirring until the mixture is uniform and free of the mineral powder, and sealing and keeping the mixture in a dark place to obtain cold patch material 2, namely the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
Example 3. Heating 500g of 110# heavy traffic road petroleum asphalt to 160 ℃, adding 100g of TPO, starting a high-speed stirring device, stirring at 6000rpm for 15min, keeping the temperature between 160+/-5 ℃, adding 500g of rubber oil, stirring uniformly, cooling to 80-100 ℃, adding 6103 60g of photo-curing resin, stirring uniformly, cooling to below 40 ℃, adding 1173.8 g of photo-initiator, stirring uniformly, sealing and shading, and preserving to obtain 3# cold patch asphalt.
And weighing the cold patch asphalt 3# and aggregate according to the mass ratio of the cold patch asphalt 3# to the aggregate of 4.4%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone in aggregate to 40 ℃, heating cold patch asphalt 3# to 80 ℃, sequentially adding the broken stone and the cold patch asphalt into a stirring pot, stirring for 10s, adding mineral powder in aggregate, stirring until the mixture is uniform and free of the mineral powder, and sealing and keeping the mixture in a dark place to obtain cold patch material 3, namely the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
Example 4. Heating 500g of 110# heavy road petroleum asphalt to 170 ℃, adding 20g of TPO, starting a high-speed stirring device, stirring at 7000rpm for 10min, keeping the temperature between 170+/-5 ℃, adding 400g of rubber oil, stirring uniformly, cooling to 80-100 ℃, adding 610410g of photo-curing resin, stirring uniformly, cooling to below 40 ℃, adding 1173.2 g of photo-initiator, stirring uniformly, sealing and shading, and preserving to obtain 4# cold patch asphalt.
And weighing the cold patch asphalt 4# and aggregate according to the mass ratio of the cold patch asphalt 4# to the aggregate of 4.6%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone in aggregate to 40 ℃, heating cold patch asphalt No. 4 to 80 ℃, sequentially adding the broken stone and the cold patch asphalt into a stirring pot, stirring for 10 seconds, adding mineral powder in aggregate, stirring until the mixture is uniform and free of the mineral powder, and sealing and keeping the mixture in a dark place to obtain the cold patch asphalt No. 4, namely the road pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
Example 5. Heating 500g of 110# heavy road petroleum asphalt to 150 ℃, adding 60g of TPO, starting a high-speed stirring device, stirring at 3000rpm for 10min, keeping the temperature between 150+/-5 ℃, adding 400g of rubber oil, stirring uniformly, cooling to 80-100 ℃, adding 6201 50g of light-cured resin SM, stirring uniformly, cooling to below 40 ℃, adding 184 g of photoinitiator, stirring uniformly, sealing, shading and preserving to obtain the cold-patch asphalt No. 5.
And weighing the cold patch asphalt 5# and aggregate according to the mass ratio of the cold patch asphalt 5# to the aggregate of 4.6%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone in aggregate to 40 ℃, heating cold patch asphalt No. 4 to 80 ℃, sequentially adding the broken stone and the cold patch asphalt into a stirring pot, stirring for 10s, adding mineral powder in aggregate, stirring until the mixture is uniform and free of the mineral powder, and sealing and keeping the mixture in a dark place to obtain the cold patch material 5, namely the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
Example 6. Heating 400g of 110# heavy road petroleum asphalt to 150 ℃, adding 20g of TPO, starting a high-speed stirring device, stirring at 3000rpm for 10min, keeping the temperature between 150+/-5 ℃, adding 500g of rubber oil, stirring uniformly, cooling to 80-100 ℃, adding 611930g of photo-curing resin, stirring uniformly, cooling to below 40 ℃, adding 1173.3 g of photo-initiator, stirring uniformly, sealing and shading, and preserving to obtain the cold-patch asphalt No. 6.
Taking the cold patch asphalt 6# and aggregate according to the mass ratio of the cold patch asphalt 6# to the aggregate of 4.9%, and placing broken stone and mineral powder in the aggregate separately. Heating broken stone in aggregate to 70 ℃, heating cold patch asphalt No. 4 to 90 ℃, sequentially adding the broken stone and the cold patch asphalt into a stirring pot, stirring for 10s, adding mineral powder in aggregate, stirring until the mixture is uniform and free of the mineral powder, and sealing and keeping the mixture in a dark place to obtain cold patch material 6, namely the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
The cold patch asphalt and cold patch materials obtained in the above examples were tested and the indexes are shown in table 8 below:
from the results, the cold-patch asphalt provided by the invention has the advantages of good workability in construction and high strength after solidification, can fully meet the requirements of cold-zone pavement pit disease treatment, does not contain diesel oil, greatly reduces the safety risk in the production, storage and transportation processes, has good comprehensive performance and has good market prospect. The present invention is not limited to the embodiments, but can be implemented by any of the above embodiments, or by any equivalent modifications according to the above embodiments.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way. As described in the above embodiments of the present invention, other mixtures obtained by the same or similar methods and components and methods for preparing the same are within the scope of the present invention.
Claims (10)
1. The asphalt mixture for repairing the pavement pit in the safe and environment-friendly severe cold region is characterized by comprising cold patch asphalt and aggregate, wherein the mass ratio of the cold patch asphalt to the aggregate is 4.4-4.9%, and the cold patch asphalt comprises the following components in parts by mass:
2. the asphalt mixture for repairing pavement pits in a severe cold region, which is safe and environment-friendly according to claim 1, wherein the aggregate is a mixture of gravels and mineral powder.
3. The safe and environment-friendly pavement pit repair asphalt mixture for severe cold regions according to claim 1, wherein the road petroleum asphalt is 90# road petroleum asphalt, 110# road petroleum asphalt, 130# road petroleum asphalt and 160# road petroleum asphalt for severe cold regions.
4. The asphalt mixture for repairing pavement pits in a safe and environment-friendly severe cold region according to claim 1, wherein the light-cured resin is acrylate light-cured resin.
5. The safe and environment-friendly asphalt mixture for repairing pavement pits in severe cold areas according to claim 1, wherein the photoinitiator is a photoinitiator 1173 or a photoinitiator BP.
6. A method for preparing the safe and environment-friendly pavement pit repairing asphalt mixture in severe cold areas according to any one of claims 1-5, which is characterized by comprising the following steps:
(1) Preparing cold patch asphalt: heating road petroleum asphalt to 140-150 ℃, and adding TPO thermoplastic elastomer material to enable TPO thermoplastic elastomer to be fully melted and dispersed in the road petroleum asphalt; then stopping heating, adding low-volatility low-pour point rubber oil, reducing the temperature to 80-100 ℃, adding light-cured resin, continuously stirring and reducing the temperature, adding a photoinitiator and uniformly stirring when the temperature is reduced to be lower than 40 ℃, and preparing cold patch asphalt;
(2) Preheating crushed stone to 30-70 ℃, preheating cold patch asphalt to 60-90 ℃, sequentially adding the crushed stone and the cold patch asphalt into a stirring pot, stirring, and then adding mineral powder for stirring to obtain the pavement pit repairing asphalt mixture in the safe and environment-friendly severe cold region.
7. The method for preparing the asphalt mixture for repairing the pavement pits in the severe cold region, which is safe and environment-friendly, according to claim 6, wherein in the step (1), after the TPO thermoplastic elastomer material is added, the stirring speed is more than 3000rpm, and the stirring time is 5-20 minutes.
8. The method for preparing the asphalt mixture for repairing the pavement pits in the severe cold region, which is safe and environment-friendly, according to claim 6, wherein in the step (2), the crushed stone is stirred for 5-30 seconds after the cold patch asphalt is added.
9. The method for preparing the asphalt mixture for repairing the pavement pits in the severe cold region, which is safe and environment-friendly, according to claim 6, wherein the step (2) is characterized in that the mineral powder is stirred for 20-60 seconds after adding cold patch asphalt.
10. The method for preparing the safe and environment-friendly severe cold region pavement pit repairing asphalt mixture according to claim 6, wherein the safe and environment-friendly severe cold region pavement pit repairing asphalt mixture is packaged and stored by adopting a sealed and light-proof outer package.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210062988.9A CN116496028A (en) | 2022-01-19 | 2022-01-19 | Asphalt mixture for repairing pavement pits in safe and environment-friendly severe cold region and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210062988.9A CN116496028A (en) | 2022-01-19 | 2022-01-19 | Asphalt mixture for repairing pavement pits in safe and environment-friendly severe cold region and preparation method thereof |
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| CN116496028A true CN116496028A (en) | 2023-07-28 |
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| CN (1) | CN116496028A (en) |
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