CN113860799A - Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof - Google Patents
Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof Download PDFInfo
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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
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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
- 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
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
Abstract
The invention relates to a solidifying cold-patch material suitable for a low-temperature humid environment and a preparation method thereof, wherein the solidifying cold-patch material comprises the following components in parts by weight: 64-78 parts of RAP material, 16-31 parts of new aggregate, 0.9-1.1 parts of regenerant and 3-5 parts of cold patch asphalt. The cold patch asphalt comprises the following components in parts by weight: 45-56 parts of modified asphalt, 28 parts of soap solution and 20-26 parts of low-temperature curing epoxy glue (latent epoxy resin). The preparation method comprises the following steps: slowly adding the regenerant into the preheated RAP material at a constant speed, uniformly mixing, adding the cold patch asphalt and the preheated new aggregate, uniformly mixing, and discharging when the temperature is less than or equal to 80 ℃. Compared with the prior art, the cold patch disclosed by the invention has the advantage of being quickly combined with a damaged pavement in a low-temperature humid environment, and has a wide prospect in the fields of road maintenance and emergency maintenance.
Description
The technical field is as follows:
the invention belongs to the field of road maintenance and emergency maintenance, and particularly relates to a curing cold-patch material suitable for a low-temperature humid environment such as rainy and snowy seasons and a preparation method thereof.
Background art:
road repair is an important working link and is usually carried out in a season with proper weather temperature, on one hand, the performance of the current common asphalt pavement repair material is difficult to give full play in a humid environment, on the other hand, the road repair is limited by technical reasons, and the research on asphalt pavement repair in China is mainly focused on regions with mild climate. Therefore, for some high and cold areas in China, which are in snowing and raining seasons for more than half a year, road repairing work cannot be timely carried out, the damaged road can continuously bear the effects of driving and natural environment, the damage degree is further increased, the repairing cost is increased, and the driving safety is seriously endangered. Therefore, it is important to develop a road patching material that can be used in rainy and snowy seasons.
In the traditional road, the mode of milling and re-paving the hot-mixed asphalt mixture is adopted for repairing the area with concentrated diseases and large damaged area, but the heat preservation of the hot-mixed asphalt and the allocation of construction machinery are difficult to control for the local area with dispersed pits and small engineering quantity. In order to save cost and ensure construction quality, a cold-patch method is mainly adopted for small-area pits. However, the current common cold patching material cannot be constructed in a humid environment, and a pit repaired in a rainwater season is easy to loose and peel off, and is seriously caked at a low temperature, so that a secondary repairing phenomenon of patching and rotting occurs. In view of the above disadvantages, many researchers have tried to add cement as an aggregate to a cold-patch material in recent years, and by using hydration reaction of cement, not only can water in the mixture be consumed to promote early solidification, but also the overall strength can be improved. However, the cement has large shrinkage deformation in winter, and is easy to crack, pump mud and other diseases. Patent CN 110171942B applied for a moisture curing reaction type cold patch, which utilizes single-component moisture curing polyurethane to perform a curing reaction with water vapor in the air to improve the early strength of the cold patch, and provides reference for solving the performance problem of the cold patch in rainy and snowy seasons, but the polyurethane still cannot be constructed in a humid environment. Aiming at the difficulty in maintenance and repair of roads in the rainy and snowy seasons in severe cold areas, the epoxy adhesive is used as a wet-solid material for preparing the cold-patch material, so that the polyurethane has the same advantages as polyurethane, and can be cured in a wet state. At present, the epoxy glue is widely applied to repairing of bridge underwater pile foundations, has good repairing effect in a humid environment, and is expected to solve the problem of solidification in rainy and snowy seasons when being applied to cold patching materials.
Emulsified asphalt is a low-viscosity material which can show better rheological property at normal temperature, and the good waterproof capability makes the emulsified asphalt one of the most commonly used asphalt in cold-patch materials. Patent application document with application number CN202110244807.X discloses a slow-release type anti-freezing ice fog sealing layer material, which consists of a slow-release type anti-freezing ice material, emulsified asphalt, waterborne epoxy resin, a curing agent and a penetrating agent, wherein the modified emulsified asphalt material doped with the slow-release type anti-freezing ice material is sprayed on an old asphalt pavement, so that the slow-release type anti-freezing ice fog sealing layer material not only can seal micro cracks of the pavement and avoid the water loss of the pavement structure; repairing the bonding effect of the asphalt cement and prolonging the service life of the road surface material. Meanwhile, the anti-icing material is added into the fog sealing layer, so that the freezing point can be inhibited, the ice and snow can be actively melted, and the driving safety in winter is improved. The invention patent application with the application number of CN202110168588.1 discloses a freeze-thaw resistant soil stabilizer, which comprises the following raw materials in 100 parts by weight: 35-65 parts of waterborne epoxy modified emulsified asphalt; 10-40 parts of anionic surfactant; 2-5 parts of a curing agent; 3-10 parts of water glass; 1-10 parts of inorganic salt; 2-10 parts of polyol; 0.5-2 parts of pore sealing agent; 10-30 parts of water. The freeze-thaw resistant soil stabilizer can improve the water resistance stability and freeze-thaw resistance of a soil condensate, and has the characteristics of simple processing technology, convenient application, quick setting time, good water resistance, high bonding strength, excellent universality on different soils and the like. The subject group of the inventor is CN202010051544.6 of 2020.01.17 application, and discloses modified emulsified asphalt for stabilizing a ballast track bed, which comprises the following components in percentage by weight: 45-56% of reclaimed rubber modified asphalt, 28% of soap solution, 13-23% of water-based epoxy resin and 3-4% of accelerator. The soap solution is prepared from a silane coupling agent, a building stone, a water-soluble polymer and a water-soluble polymer, wherein the soap solution contains an emulsifier and distilled water which are necessary in common soap solutions in the market, and the silane coupling agent is specially added in the soap solution in order to improve the cohesiveness of the composite modified emulsified asphalt and the building stone and improve the water loss resistance effect of the composite modified asphalt. The modified emulsified asphalt improves the stability and durability of the ballast track, reduces the construction cost, and is suitable for paving the whole high-speed rail. Therefore, the epoxy resin is compounded with the emulsified asphalt, and a condensate generated by the epoxy resin in a humid environment is subjected to high-density blending with an evaporation residue of the asphalt at a molecular level, so that the interfacial bonding property of the emulsified asphalt and the aggregate can be greatly improved, and the cold repair property of the emulsified asphalt is further improved.
In a word, most of the current researches on the cold-patch asphalt mixture relate to the repair application of asphalt pavement pits in a normal-temperature and rainy environment, and the research on cold-patch materials in a low-temperature and humid environment is still lacked.
The invention content is as follows:
in order to overcome the defects of the prior art, the invention provides a curing cold patch suitable for a low-temperature humid environment and a preparation method thereof. The prepared cold patch has the advantage of being quickly combined with a damaged pavement in a low-temperature and humid environment, and is applied to the aspects of daily maintenance of asphalt pavements and emergency maintenance under special climatic conditions.
In order to achieve the purpose, the invention adopts the following technical scheme:
the solidifying cold-patch material suitable for the low-temperature humid environment comprises an RAP material, a new aggregate, a regenerant and cold-patch asphalt, and the mass ratio of the RAP material to the new aggregate to the regenerant is 64-78: 16-31: 0.9-1.1: 3-5.
The RAP material is a milling material generated in the process of repairing a large area of a road along the way, and after the RAP material is fully crushed, the maximum particle size of the RAP material is controlled to be below 16 mm. The content of the aged asphalt in the RAP material is determined by adopting a centrifugal extraction method or a combustion method, and the content of the aged asphalt is controlled to be not less than 4%.
Hydrophobic stones such as limestone and basalt are preferably selected as the new aggregate, so that the adhesion of the cold-patch asphalt and the cold-patch aggregate is improved, and the technical performance of the cold-patch is ensured.
The cold-patch aggregate prepared from the RAP material and the new aggregate meets the grading range of LB-13 type cold-patch aggregate:
the sieve plate with the thickness of the sieve plate is characterized by comprising the following components, by weight, 100% of 16mm sieve holes, 90-100% of 13.2mm sieve holes, 70-85% of 9.5mm sieve holes, 35-50% of 4.75mm sieve holes, 18-35% of 2.36mm sieve holes, 12-25% of 1.18mm sieve holes, 8-18% of 0.6mm sieve holes, 5-12% of 0.3mm sieve holes, 3-8% of 0.15mm sieve holes and 2-5% of 0.075mm sieve holes.
The regenerant is a high-permeability regenerant (the wet strength provided by Jiangsu Subo New Material Co., Ltd.)
High-performance asphalt regenerant), the aromatic hydrocarbon component of which is required to be not less than 50 percent, not only can adjust the light component content in the aged asphalt in the RAP material, but also can fully permeate into the condensed asphaltene, thereby more effectively recovering the colloid structure of the aged asphalt and improving the regeneration effect.
The cold patch asphalt comprises the following components in parts by weight: 45-56 parts of modified asphalt, 28 parts of soap solution and 20-26 parts of low-temperature curing epoxy glue.
The specific addition of the raw materials is determined according to actual construction and environmental temperature.
The preparation method of the cold patch asphalt comprises the following steps:
(1) heating the modified asphalt to 180 ℃, slowly injecting the soap solution, and shearing at a high speed of 4500r/min for 15min to prepare the composite modified emulsified asphalt.
(2) And adding the low-temperature curing epoxy glue into the composite modified emulsified asphalt according to the proportion, and uniformly mixing at normal temperature to obtain the cold patch asphalt.
The modified asphalt is preferably one or composite modified asphalt of high-rubber asphalt and SBR modified asphalt so as to improve the caking property of the cold-patch asphalt and improve the low-temperature performance, water damage resistance and ageing resistance of the cold-patch asphalt.
The soap solution is prepared from an emulsifier, a silane coupling agent and distilled water according to the mass ratio of 1.1:0.4: 26.5. The emulsifier is a nonionic emulsifier, and the solid content is controlled to be 55-65% so as to ensure that the demulsified asphalt has good adhesion.
The low-temperature curing epoxy adhesive is latent epoxy resin, and has the advantages of long working life in a closed environment and rapid curing under the action of low temperature and moisture.
The preparation method of the curing cold patch suitable for the low-temperature humid environment comprises the following steps:
(1) preheating the new aggregate at 180 +/-5 ℃ for 6 h.
(2) Preheating RAP material at 120 + -2 deg.C for 2 hr, and mixing in a mixing pot for 1.5 min.
(3) Slowly adding the regenerant into the mixing pot at a constant speed, and mixing for 2 min.
(4) Adding the cold patch asphalt and the preheated new aggregate into a mixing pot in proportion, mixing for 2min, and discharging when the temperature is less than or equal to 80 ℃.
Has the advantages that:
1. the method provided by the invention is made of local materials, and the processed waste asphalt pavement material (RAP material) generated by milling during repair along the way is used as one of the raw materials of the cold patch, so that the problem of difficulty in conveying construction raw materials in rainy and high-cold areas is solved, and meanwhile, the method is used as a new RAP material processing mode, and the utilization rate of the RAP material can be effectively improved.
2. The low-temperature curing cold patch designed in the rainy and snowy seasons fully investigates the pavement structure form of the traditional high and cold areas, adopts a suspension compact structure formed by continuous dense grading, has larger cohesive force and smaller water permeability, can effectively block rain and snow from seeping when being applied to the high and cold areas, and has stronger adaptability with the old pavement structure.
3. The invention improves the method that the traditional cold-patch material consumes water to improve the initial strength by using cement, and the cold-patch material prepared by adopting the low-temperature curing epoxy glue can be cured in a low-temperature humid environment, thereby solving the problem of road rush repair under the severe weather conditions of rain, snow and the like; on the other hand, the bonding body of the prepared cold-patch material is a coupling body of rubber and epoxy materials, has high elasticity, can enhance the elastic response of the pavement, not only can solve the problem that the cold-patch material doped with cement cannot adapt to low-temperature cracking in alpine regions, but also can inhibit road icing by utilizing the deformation of the cold-patch material under the action of stress and improve the safety of the pavement.
4. The cold patch disclosed by the invention solves the problem of poor durability of asphalt pavement repair by adopting the cold patch under a low-temperature humid environment, the cold patch disclosed by the invention can be cured under the low-temperature humid environment, and a cross-linked network formed after a cold patch asphalt curing reaction has excellent barrier property, cohesive force and water loss resistance, so that secondary repair can be effectively avoided.
Drawings
FIG. 1 is a graph of Kentuckberg fly-off test results obtained in an example of the present invention;
FIG. 2 shows the results of Marshall stability tests conducted at different times in accordance with the present invention;
FIG. 3 is a water-soaked rut test obtained in accordance with an embodiment of the present invention.
The specific implementation mode is as follows:
the following description is given to illustrate the present invention without limiting the scope of the present invention.
The cold patch material consists of an RAP material, a new aggregate, a regenerant and cold patch asphalt; hydrophobic stones are preferably selected as the new aggregates in the aggregates, and the content of aged asphalt in the RAP materials is not lower than 4%.
The cold-patch aggregate grading prepared from the RAP material and the new aggregate meets the grading requirement of LB-13 type cold-patch, and is shown in Table 1 (wherein the unit of mass fraction is%):
TABLE 1 aggregate grading (mass percentage through mesh mm/%)
| Mesh/mm | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| By mass fraction | 100 | 90～100 | 70～85 | 35～50 | 18～35 | 12～25 | 8～18 | 5～12 | 3～8 | 2～5 |
The raw materials with different proportions adopted in the examples 1-3 are shown in the table 2, wherein the new aggregates adopted in the examples 1-3 are respectively limestone, basalt and basalt.
TABLE 2
The preparation method comprises the following steps:
(1) the new aggregate was preheated at 185 ℃ for 6 h.
(2) Preheating RAP material at 120 deg.C for 2 hr, pouring into a mixing pot, and mixing for 1.5 min.
(3) Slowly adding the regenerant into the mixing pot at a constant speed, and mixing for 2 min.
(4) Adding preheated new aggregate and cold patch asphalt into a mixing pot in proportion, mixing for 2min, and discharging when the temperature is less than or equal to 80 ℃.
The preparation method of the cold patch asphalt comprises the following steps:
(1) heating the modified asphalt to 180 ℃, slowly injecting the soap solution, and shearing at a high speed of 4500r/min for 15min to prepare the composite modified emulsified asphalt.
(2) And adding the low-temperature curing epoxy glue into the composite modified emulsified asphalt according to the proportion, and uniformly mixing at normal temperature to obtain the cold patch asphalt.
Example 4 different cold-feed performance tests:
in order to reflect the cohesive force of the cold patch in the presence of moisture, the present inventors designed the following tests to evaluate the initial stability and durability of a cured cold patch suitable for use in a low temperature and moisture environment.
(1) Kentucky fly test
The prepared cold-patch materials are stirred at normal temperature and are compacted to form (50 times per surface) Marshall test pieces, each cold-patch material is formed into 4 test pieces, the test pieces are cured for 24 hours in an environment of 5 ℃, and then a Kentusburg flying test is carried out in an environment box of 5 ℃. The initial anti-flying capability of each cold-patch material is shown in figure 1, and the result shows that the more the asphalt is used in a certain range, the less the RAP material is mixed, the better the bonding property of the cold-patch material is, and the cold-patch material can adapt to low-temperature humid environment.
(2) Marshall stability
After the Marshall test piece is prepared by the same method, the Marshall test piece is respectively maintained for 1 day and 7 days in the environment of 20 ℃, and then the Marshall stability test is carried out at normal temperature. The initial strength of each cold-fed batch is shown in FIG. 2.
(3) Submerged rut test
Preparing a dense-graded (AC-13) rut plate, reserving a cylindrical (diameter of 30cm and depth of 3cm) pit at the center of the surface of the rut plate, injecting 2/3 purified water into the pit, pouring cold-fed material, and tamping the cold-fed material according to a four-middle-four-periphery hammering mode. The cold patch was evaluated for cohesion in a humid environment by performing a rutting test after slightly watering the surface of the rutting plate to generate a deformation of 10mm for a number of times corresponding to the deformation, and the test results are shown in fig. 3.
Tests show that the results of Kentunberg loss rate, Marshall stability and water immersion rut tests of example 3 are the best, and the mixing amount of the RAP material and the new aggregate of the cold patch in example 3 is the minimum and the mixing amount of the cold patch asphalt is the maximum, which shows that the cold patch asphalt provides a larger cohesive force to resist the vehicle load and the climate environment in the early stage of cold patch forming.
In conclusion, the low-temperature curing cold-patch material prepared by the invention can be effectively cured in a low-temperature humid environment, and the formed cured material can effectively improve the adhesion among aggregates, improve the early strength of the cold-patch material, and has a wide prospect of being applied to pavement repair in rainy and snowy seasons.
The technical means disclosed by the invention are not limited to the technical means disclosed by the above embodiments, and also comprise technical solutions formed by any combination of the above technical features. Accordingly, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention.
Claims (5)
1. The solidifying cold patch suitable for the low-temperature humid environment is characterized by comprising an RAP material, a new aggregate, a regenerant and cold patch asphalt in a mass ratio of 64-78: 16-31: 0.9-1.1: 3-5;
the RAP material is a milling material generated in the process of repairing a large area of a road along the way, and after the RAP material is fully crushed, the maximum particle size of the RAP material is controlled to be below 16 mm; measuring the content of the aged asphalt in the RAP material by adopting a centrifugal extraction method or a combustion method, and controlling the content of the aged asphalt to be not less than 4%;
the maximum particle size of the cold-patch aggregate prepared from the RAP material and the new aggregate is not more than 16mm, and the grading range meets the grading requirement of LB-13 type cold-patch aggregate;
hydrophobic stones are selected as the new aggregates;
the regenerant is a high-permeability regenerant, and the aromatic hydrocarbon component of the regenerant is required to be not less than 50%.
2. The curing cold patch suitable for the low-temperature humid environment according to claim 1, wherein the prepared cold patch asphalt comprises the following components in parts by weight: 45-56 parts of modified asphalt, 28 parts of soap solution and 20-26 parts of low-temperature curing epoxy glue.
3. The curing cold-patch material suitable for the low-temperature humid environment as claimed in claim 2, wherein the modified asphalt is high-gum asphalt or SBR modified asphalt, and the soap solution is prepared from a non-ionic emulsion emulsifier, a silane coupling agent and distilled water according to a mass ratio of 1.1:0.4: 26.5; the low-temperature curing epoxy glue is latent epoxy resin.
4. The method for preparing the curing cold feed material suitable for the low-temperature humid environment as claimed in any one of claims 1-2, characterized by comprising the following steps:
(1) preparing cold patch asphalt;
(2) preheating new aggregate;
(3) preheating RAP material, pouring into a mixing pot, slowly adding the regenerant into the mixing pot at a constant speed, and uniformly mixing;
(4) and (3) adding the cold patch asphalt prepared in the step (1) and the preheated new aggregate in the step (2) into a mixing pot in proportion, uniformly mixing, and discharging when the temperature is less than or equal to 80 ℃.
5. The curing cold patch suitable for low-temperature humid environment according to claim 4, wherein the cold patch asphalt is prepared by the following steps:
(1) heating the modified asphalt to 180 ℃, slowly injecting soap solution, and uniformly shearing and mixing at a high speed to obtain the composite modified emulsified asphalt;
(2) and adding the low-temperature curing epoxy glue into the composite modified emulsified asphalt according to the proportion, and uniformly mixing at normal temperature to obtain the cold patch asphalt.
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| CN202111197495.8A CN113860799A (en) | 2021-10-14 | 2021-10-14 | Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof |
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| CN202111197495.8A Pending CN113860799A (en) | 2021-10-14 | 2021-10-14 | Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403307A (en) * | 2022-09-29 | 2022-11-29 | 上海龙孚道路养护工程有限公司 | Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101491105B1 (en) * | 2014-09-29 | 2015-02-13 | 주식회사 다현산업 | Cold-mix asphalt compound for repairing road and repairing method using the same |
| CN106082792A (en) * | 2016-06-26 | 2016-11-09 | 重庆诚邦路面材料有限公司 | A kind of composite asphalt cold-repairing material and preparation method |
| CN107586064A (en) * | 2016-07-07 | 2018-01-16 | 交通运输部公路科学研究所 | A kind of porous asphalt pavement cold-repairing material and preparation method thereof |
| CN110171942A (en) * | 2019-07-01 | 2019-08-27 | 沈阳建筑大学 | A kind of moisturecuring response type Bituminous Pavement Cold feed supplement and preparation method thereof |
| CN111116102A (en) * | 2019-12-27 | 2020-05-08 | 广州市市维新材料科技有限公司 | Quick-setting emulsified asphalt cold-patch material and preparation method thereof |
| CN111117271A (en) * | 2020-01-17 | 2020-05-08 | 东南大学 | Modified emulsified asphalt for stabilizing ballast track bed and preparation method thereof |
| CN111606605A (en) * | 2020-06-11 | 2020-09-01 | 郭炎伟 | Water-based epoxy resin modified emulsified asphalt cold-patch material for rapid road repair and preparation method thereof |
| CN111732370A (en) * | 2020-06-28 | 2020-10-02 | 江苏天诺环境工程技术开发有限公司 | High-performance cold-patch material based on old asphalt pavement milling material and preparation method thereof |
-
2021
- 2021-10-14 CN CN202111197495.8A patent/CN113860799A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101491105B1 (en) * | 2014-09-29 | 2015-02-13 | 주식회사 다현산업 | Cold-mix asphalt compound for repairing road and repairing method using the same |
| CN106082792A (en) * | 2016-06-26 | 2016-11-09 | 重庆诚邦路面材料有限公司 | A kind of composite asphalt cold-repairing material and preparation method |
| CN107586064A (en) * | 2016-07-07 | 2018-01-16 | 交通运输部公路科学研究所 | A kind of porous asphalt pavement cold-repairing material and preparation method thereof |
| CN110171942A (en) * | 2019-07-01 | 2019-08-27 | 沈阳建筑大学 | A kind of moisturecuring response type Bituminous Pavement Cold feed supplement and preparation method thereof |
| CN111116102A (en) * | 2019-12-27 | 2020-05-08 | 广州市市维新材料科技有限公司 | Quick-setting emulsified asphalt cold-patch material and preparation method thereof |
| CN111117271A (en) * | 2020-01-17 | 2020-05-08 | 东南大学 | Modified emulsified asphalt for stabilizing ballast track bed and preparation method thereof |
| CN111606605A (en) * | 2020-06-11 | 2020-09-01 | 郭炎伟 | Water-based epoxy resin modified emulsified asphalt cold-patch material for rapid road repair and preparation method thereof |
| CN111732370A (en) * | 2020-06-28 | 2020-10-02 | 江苏天诺环境工程技术开发有限公司 | High-performance cold-patch material based on old asphalt pavement milling material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴潮玮等, 北京理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403307A (en) * | 2022-09-29 | 2022-11-29 | 上海龙孚道路养护工程有限公司 | Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof |
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Application publication date: 20211231 |