CN115073064A - Hot mixing agent for repairing pit and groove - Google Patents
Hot mixing agent for repairing pit and groove Download PDFInfo
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- CN115073064A CN115073064A CN202210860254.5A CN202210860254A CN115073064A CN 115073064 A CN115073064 A CN 115073064A CN 202210860254 A CN202210860254 A CN 202210860254A CN 115073064 A CN115073064 A CN 115073064A
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- 238000002156 mixing Methods 0.000 title claims abstract description 63
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 72
- 239000010426 asphalt Substances 0.000 claims abstract description 40
- 239000003085 diluting agent Substances 0.000 claims abstract description 24
- 239000002904 solvent Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 21
- 239000004575 stone Substances 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims abstract description 3
- 239000002562 thickening agent Substances 0.000 claims abstract description 3
- 101000638161 Homo sapiens Tumor necrosis factor ligand superfamily member 6 Proteins 0.000 claims description 10
- 102100031988 Tumor necrosis factor ligand superfamily member 6 Human genes 0.000 claims description 10
- 230000008439 repair process Effects 0.000 claims description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a hot mixing agent for repairing a pit and a groove, belonging to the technical field of building paving materials; the hot-mixing agent is an asphalt mixture, is prepared by mixing a matrix, a warm-mixing agent, a solvent, a diluent and an anti-stripping agent, and comprises the following components in parts by weight: 50-90 parts of a matrix; 4-6 parts of a warm mixing agent; 5-40 parts of a solvent; 2-8 parts of a diluent; 1-5 parts of an anti-stripping agent; the matrix is a mixture of asphalt and stone, and the mass addition ratio of the asphalt to the stone in the matrix is 1: 20; the diluent is an inactive diluent and is prepared by mainly taking chloroprene rubber as a matrix and adding resin, a thickening agent and a filler. The raw material cost of the invention is lower, the hot-mixing agent prepared has high strength, compared with the existing hot-mixing agent, the hot-mixing agent of the invention has the advantages of uniform mixing, faster curing speed after paving and high strength and good anti-stripping performance after hardening; the material has better strength performance and water resistance, and is simple to manufacture and low in cost.
Description
Technical Field
The invention relates to a repairing agent for a pit of an asphalt pavement, in particular to a hot-mixing agent for repairing the pit, and belongs to the technical field of building paving materials.
Background
With the construction and development of high-grade roads, the requirements on modern road traffic are not limited to all-weather passing, and higher requirements are provided on the aspects of ensuring the safety and stable running of vehicles, the service performance of pavements and the like. As the most widely used type of pavement at present, asphalt pavement plays an important role therein; as a seamless continuous pavement, the asphalt pavement has sufficient mechanical strength, can adapt to various driving loads, has the characteristics of stable and comfortable driving, low noise, convenient maintenance and the like, and gradually becomes the main structural type of the highway pavement. However, under the repeated coupling action of the driving load and factors such as temperature, humidity and ultraviolet illumination, the asphalt and the mineral aggregate are continuously subjected to physical and chemical changes, the capability of the asphalt for adapting to climate change is gradually reduced, and the asphalt shows disease damage phenomena such as looseness, potholes and peeling, so that the driving comfort and safety of the vehicle are influenced. In addition, in the driving process of the vehicle, in order to avoid a road surface pit, confluence and diversion have to be carried out, so that the probability of lane change is increased, traffic conflict points are increased, and particularly under the conditions of dense traffic roads, bridges, night operation and the like, the accident rate is increased, and the traffic capacity of the roads is reduced. Therefore, how to repair the pavement pit damage quickly, efficiently and economically becomes the leading edge and the hot spot of the current asphalt pavement maintenance technology research at home and abroad.
At present, pavement repair mainly comprises cold patch and hot patch, a solvent-based cold patch asphalt method is adopted, the technical performance and the durability of a repair material are difficult to meet the requirement of rapid repair of a highway, and the performance needs to be further improved; by adopting the method for heating and repairing the modified asphalt mixture, the mixing temperature during preparing the asphalt mixture is 140-200 ℃, and the hot-mixed asphalt mixture needs to be subjected to special coating treatment of the isolating agent during cooling, so that the material cost is increased, and the performance of the material is influenced.
Disclosure of Invention
The purpose of the invention is: the hot-mixing agent for repairing the pits of the highway pavement solves the problem of defects of the pit repairing material in the prior art, and has the advantages of good material strength performance, good water resistance, simple manufacture and low cost.
In order to achieve the purpose, the invention adopts the following technical scheme: the hot-mixing agent for repairing the pit and the groove is an asphalt mixture, is prepared by mixing a matrix, a warm-mixing agent, a solvent, a diluent and an anti-stripping agent, and comprises the following components in parts by weight: 50-90 parts of a matrix; 1-6 parts of a warm mixing agent; 5-40 parts of a solvent; 2-8 parts of a diluent; 1-5 parts of an anti-stripping agent.
Preferably, the substrate is a mixture of asphalt and stone.
Preferably, the mass adding ratio of the asphalt to the stone in the matrix is 1: 20.
Preferably, the warm-mixing agent is APTL/01 warm-mixing agent.
Preferably, the diluent is an inactive diluent, and is prepared by mainly taking chloroprene rubber as a matrix and adding resin, a thickening agent and a filler.
Preferably, the solvent is a solvent with a boiling point of 60-90 ℃, and comprises one or more of dimethyl carbonate (DMC), chloroform, tetrahydrofuran, carbon tetrachloride, cyclohexane and benzene.
The invention has the beneficial effects that:
1) the raw material cost of the invention is lower, the hot-mixing agent prepared has high strength, compared with the existing hot-mixing agent, the hot-mixing agent of the invention has the advantages of uniform mixing, faster curing speed after paving and high strength and good anti-stripping performance after hardening.
2) The hot-mixing agent can be prepared by using conventional equipment, can adapt to colder weather, has excellent cold resistance, and is widely applicable to pavement repair in different environments.
Detailed Description
The invention is described in detail in the following examples, which are intended to be illustrative only and not limiting as to the application of the invention.
Example 1: a hot mixing agent for repairing a pit and a groove is prepared by taking 20 parts of asphalt, 60 parts of stone, 4 parts of APTL/01 warm mixing agent, 10 parts of solvent, 4 parts of diluent and 2 parts of anti-stripping agent according to the mass ratio; mixing asphalt and stone under stirring to prepare a mixing agent matrix, then sequentially adding a solvent, a diluent and an anti-stripping agent, keeping the temperature between 120 and 140 ℃ during stirring, and adding an APTL/01 warm mixing agent by spraying and stirring; during the mixing process of the mixture, the APTL/01 warm mixing agent and the asphalt are synchronously sprayed into a mixing pot. Under the mechanical stirring, a large amount of surfactant micelles are contacted with hot asphalt, water molecules on the peripheries of the micelles are rapidly evaporated and dissipated, and the lipophilic group is contacted with the asphalt; the residual water molecules which are not lost are combined with the hydrophilic groups of the surfactant, so that a large number of structural water films with lubricating function are formed among the asphalt coated with the aggregate; through the lubricating action of the structure water film, the mixing workability of the mixture is increased, and the asphalt cement is prevented from agglomerating to a certain extent.
In the process of spreading and compacting the mixture, the structural water film plays a role in lubrication, so that the spreading speed is increased, the mixture is easy to compact, and the mixture is cooled, mixed, spread and compacted. After compaction, under the action of mechanical tearing force and environmental factors, water molecules gradually dissipate, structural water films disappear, surface active substances are quickly transferred to a boundary interface between asphalt and aggregates, and the surface active substances are alkaline and have the effect similar to an asphalt anti-stripping agent, so that the bonding property between the aggregates and the asphalt cement is enhanced.
Example 2: a hot mixing agent for repairing a pit and a groove is prepared by taking 10 parts of asphalt, 80 parts of stone, 2 parts of APTL/01 warm mixing agent, 5 parts of solvent, 2 parts of diluent and 1 part of anti-stripping agent according to the mass ratio; mixing asphalt and stone while stirring to prepare a mixing agent matrix, and then sequentially adding a solvent, a diluent and an anti-stripping agent, wherein the temperature is kept between 120 ℃ and 140 ℃ during stirring.
Example 3: a hot mixing agent for repairing a pit and a groove is prepared by taking 10 parts of asphalt, 40 parts of stone, 4 parts of APTL/01 warm mixing agent, 40 parts of solvent, 3 parts of diluent and 3 parts of anti-stripping agent according to the mass ratio; mixing asphalt and stone under stirring to obtain a mixing agent matrix, sequentially adding solvent, diluent and antistripping agent, and stirring while maintaining the temperature at 120-140 deg.C.
Example 4: a hot mixing agent for repairing a pit and a groove is prepared by taking 20 parts of asphalt, 30 parts of stone, 6 parts of APTL/01 warm mixing agent, 31 parts of solvent, 8 parts of diluent and 5 parts of anti-stripping agent according to the mass ratio; mixing asphalt and stone under stirring to obtain a mixing agent matrix, sequentially adding solvent, diluent and antistripping agent, and stirring while maintaining the temperature at 120-140 deg.C.
Example 5: a hot mixing agent for repairing a pit and a groove is prepared by taking 30 parts of asphalt, 50 parts of stone, 3 parts of APTL/01 warm mixing agent, 10 parts of solvent, 4 parts of diluent and 3 parts of anti-stripping agent according to the mass ratio; mixing asphalt and stone while stirring to prepare a mixing agent matrix, and then sequentially adding a solvent, a diluent and an anti-stripping agent, wherein the temperature is kept between 120 ℃ and 140 ℃ during stirring.
Example 6: a hot mixing agent for repairing a pit and a groove is prepared by taking 20 parts of asphalt, 50 parts of stone, 4 parts of APTL/01 warm mixing agent, 20 parts of solvent, 2 parts of diluent and 4 parts of anti-stripping agent according to the mass ratio; mixing asphalt and stone under stirring to obtain a mixing agent matrix, sequentially adding solvent, diluent and antistripping agent, and stirring while maintaining the temperature at 120-140 deg.C.
The hot-mix agents of examples 1-6 were tested for elongation at break, adhesion peel resistance, and low temperature crack resistance, respectively, wherein the elongation at break was tested at 5 ° by selecting 50mm by 40mm blocks of the admixture, and tensile testing was performed to determine the elastic recovery, and the 90% recovery was acceptable; the adhesion and the falling resistance are tested by adopting the same size of the mixing agent block to press down the mixing agent block under the environment of 25 ℃ by using a conical needle without puncturing the surface, and the maximum penetration distance is qualified by 3-5 mm; the low-temperature crack resistance is tested by the same blending agent block under the environment of 12 ℃ below zero, and the bending pressure is qualified to be not more than 300 MPA.
The test results for examples 1-6 are as follows:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Elongation resistance to crack | 92.8% | 91.3% | 96.7% | 95.6% | 93.5% | 94.2% |
| Adhesion and detachment resistance | 4.2mm | 3.7mm | 4.6mm | 4.9mm | 3.8mm | 4.4mm |
| Low temperature crack resistance | 207MPA | 201MPA | 226MPA | 289MPA | 218MPA | 243MPA |
From the comparative data, the overall performance of example 4 is better than that of other examples, and it can be seen that when the number of the matrix is fixed, the larger the number of the warm-mix agent, the thinner and the anti-stripping agent is, the better the elongation performance of the hot-mix agent is, the stronger the anti-cracking performance is, and the larger the solvent ratio is, the better the adhesion and the anti-stripping performance is.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The hot-mixing agent for repairing the pit and the groove is characterized by being an asphalt mixture, prepared by mixing a matrix, a warm-mixing agent, a solvent, a diluent and an anti-stripping agent, and comprising the following components in parts by weight: 50-90 parts of a matrix; 4-6 parts of a warm mixing agent; 5-40 parts of a solvent; 2-8 parts of a diluent; 1-5 parts of an anti-stripping agent.
2. The hot mix for pit repair according to claim 1, wherein: the matrix is a mixture of asphalt and stone.
3. The hot mix for pit and pit repair of claim 2, wherein: the mass addition ratio of the asphalt to the stone in the matrix is 1: 20.
4. The hot mix for pit repair according to claim 1, wherein: the warm mixing agent is APTL/01 warm mixing agent.
5. The hot mix for pit repair according to claim 1, wherein: the diluent is an inactive diluent and is prepared by mainly taking chloroprene rubber as a matrix and adding resin, a thickening agent and a filler.
6. The hot mix for pit repair according to claim 1, wherein: the solvent is a solvent with a boiling point of 60-90 ℃, and comprises one or more of dimethyl carbonate, chloroform, tetrahydrofuran, carbon tetrachloride, cyclohexane and benzene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210860254.5A CN115073064A (en) | 2022-07-22 | 2022-07-22 | Hot mixing agent for repairing pit and groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210860254.5A CN115073064A (en) | 2022-07-22 | 2022-07-22 | Hot mixing agent for repairing pit and groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115073064A true CN115073064A (en) | 2022-09-20 |
Family
ID=83243772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210860254.5A Pending CN115073064A (en) | 2022-07-22 | 2022-07-22 | Hot mixing agent for repairing pit and groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115073064A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104559266A (en) * | 2015-01-29 | 2015-04-29 | 常州信拓路面改性材料有限公司 | Warm mixing agent and preparation method thereof |
| CN106746925A (en) * | 2016-11-28 | 2017-05-31 | 长沙理工大学 | A kind of warm mix temperature compensation type highway pavement pit repairing material and its preparation method and application |
| KR20180117849A (en) * | 2017-04-20 | 2018-10-30 | 남영희 | Liquid composition for repairing road cracks and manufacturing method thereof |
| CN109053032A (en) * | 2018-07-04 | 2018-12-21 | 辽宁省交通科学研究院有限责任公司 | A kind of storage type asphalt pavement pit repairing material and preparation method thereof |
| CN109574550A (en) * | 2018-12-29 | 2019-04-05 | 苏州科技大学 | Asphalt concrete pavement pit repairing material and preparation method |
-
2022
- 2022-07-22 CN CN202210860254.5A patent/CN115073064A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104559266A (en) * | 2015-01-29 | 2015-04-29 | 常州信拓路面改性材料有限公司 | Warm mixing agent and preparation method thereof |
| CN106746925A (en) * | 2016-11-28 | 2017-05-31 | 长沙理工大学 | A kind of warm mix temperature compensation type highway pavement pit repairing material and its preparation method and application |
| KR20180117849A (en) * | 2017-04-20 | 2018-10-30 | 남영희 | Liquid composition for repairing road cracks and manufacturing method thereof |
| CN109053032A (en) * | 2018-07-04 | 2018-12-21 | 辽宁省交通科学研究院有限责任公司 | A kind of storage type asphalt pavement pit repairing material and preparation method thereof |
| CN109574550A (en) * | 2018-12-29 | 2019-04-05 | 苏州科技大学 | Asphalt concrete pavement pit repairing material and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 王友奎等: "表面活性型温拌剂的应用研究", 《石油沥青》 * |
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| PB01 | Publication | ||
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Application publication date: 20220920 |