CN116589228A - Asphalt cold-patch production process - Google Patents
Asphalt cold-patch production process Download PDFInfo
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- CN116589228A CN116589228A CN202310614367.1A CN202310614367A CN116589228A CN 116589228 A CN116589228 A CN 116589228A CN 202310614367 A CN202310614367 A CN 202310614367A CN 116589228 A CN116589228 A CN 116589228A
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- asphalt
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- heating
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- 239000010426 asphalt Substances 0.000 title claims abstract description 236
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 69
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 239000002131 composite material Substances 0.000 claims abstract description 53
- 239000011159 matrix material Substances 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 239000003085 diluting agent Substances 0.000 claims abstract description 23
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000004048 modification Effects 0.000 claims abstract description 11
- 238000012986 modification Methods 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims description 43
- 229920005989 resin Polymers 0.000 claims description 43
- 239000003208 petroleum Substances 0.000 claims description 29
- 238000011049 filling Methods 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 16
- 229920000728 polyester Polymers 0.000 claims description 16
- 229920002748 Basalt fiber Polymers 0.000 claims description 15
- 239000004816 latex Substances 0.000 claims description 15
- 229920000126 latex Polymers 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 238000010008 shearing Methods 0.000 claims description 14
- 150000001412 amines Chemical class 0.000 claims description 12
- 239000003225 biodiesel Substances 0.000 claims description 12
- 235000007586 terpenes Nutrition 0.000 claims description 12
- 125000002298 terpene group Chemical group 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 150000003505 terpenes Chemical class 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000008439 repair process Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 235000019737 Animal fat Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000019387 fatty acid methyl ester Nutrition 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application discloses a production process of asphalt cold patch materials, and relates to the technical field of road maintenance materials. The asphalt cold-patch production process comprises the following steps: carrying out composite modification on the matrix asphalt to obtain composite modified asphalt; adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating and stirring, adding the diluent, uniformly stirring, and cooling to obtain asphalt cold-replenishing liquid; heating aggregate and reinforcing fiber together, and stirring uniformly to obtain a mixture; adding the asphalt cold-patch liquid into the mixture, and stirring to obtain the asphalt cold-patch material. The asphalt cold-patch material prepared by the application not only can give consideration to high-temperature stability and low-temperature crack resistance, but also can enhance the stability and strength of the asphalt cold-patch material, and can meet the requirement of quick traffic.
Description
Technical Field
The application relates to the technical field of road maintenance materials, in particular to a production process of asphalt cold-patch materials.
Background
In road maintenance engineering, pit repair is an important working content. At present, the repair methods commonly adopted for asphalt pavement damage are hot-mix asphalt mixture repair and asphalt cold-patch repair. The hot-mix asphalt mixture repairing technology is mature, but needs to be mixed and used, and a large-scale construction device is usually required on a construction site, so that the hot-mix asphalt mixture repairing technology is suitable for repairing the pavement with concentrated damage sites and large engineering quantity, is influenced by construction environments, and is not suitable for construction in low temperature and rainy and snowy weather. The asphalt cold patch can be pre-stirred and stored for a long time, is convenient to construct and is not constrained by construction equipment and environmental climate, local damage of an asphalt pavement can be timely and efficiently repaired, and the asphalt cold patch is highly accepted by road maintenance departments at home and abroad.
However, the existing asphalt cold-patch material has poor high-low temperature stability, is easy to generate segregation phenomenon, has slow strength formation, long road finishing period, poor water stability and poor water damage resistance, and greatly influences the long-term repair quality of the local damage of the asphalt pavement.
Disclosure of Invention
The application mainly aims to provide an asphalt cold-patch production process, and aims to solve the technical problem that the asphalt cold-patch prepared by the existing production process is poor in stability.
In order to achieve the above purpose, the application provides an asphalt cold-patch production process, which comprises the following steps:
carrying out composite modification on the matrix asphalt to obtain composite modified asphalt;
adding an adhesion promoter and an anti-stripping agent into the composite modified asphalt, heating and stirring, adding a diluent, uniformly stirring, and cooling to obtain asphalt cold-replenishing liquid;
heating aggregate and reinforcing fiber together, and stirring uniformly to obtain a mixture;
and adding the asphalt cold-replenishing liquid into the mixture, and stirring to obtain the asphalt cold-replenishing material.
Optionally, the step of performing composite modification on the matrix asphalt includes:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain the composite modified asphalt.
Optionally, the diluent is biodiesel, and the blending amount of the diluent is 18-24% of the mass of the matrix asphalt.
Optionally, the adhesion promoter is terpene resin, and the doping amount of the adhesion promoter is 6-12% of the mass of the matrix asphalt.
Optionally, the anti-stripping agent is a non-amine anti-stripping agent, and the blending amount of the anti-stripping agent is 0.3-0.6% of the mass of the matrix asphalt.
Optionally, the step of adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating and stirring, adding the diluent, uniformly stirring, and cooling to obtain the asphalt cold-replenishing liquid comprises the following steps: adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding the diluent when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature.
Optionally, the reinforcing fiber is a mixture of basalt fiber and polyester fiber, wherein the mass ratio of basalt fiber to polyester fiber is 2:3.
optionally, the aggregate comprises coarse aggregate, fine aggregate and filler, wherein the aggregate is prepared according to LB-13 grading, and the particle size of the coarse aggregate is more than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is less than 0.075mm.
Optionally, the step of heating the aggregate and the reinforcing fiber together and stirring uniformly to obtain the mixture comprises the following steps: heating the aggregate and the reinforcing fiber at 75 ℃ for 3-4 hours, and stirring for 180 times at 75 ℃ to obtain the mixture.
Optionally, the step of adding the asphalt cold-replenishing liquid into the mixture and stirring includes: heating the asphalt cold-replenishing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-replenishing liquid into the mixture, and stirring for 90 times.
According to the application, the matrix asphalt is subjected to composite modification, the high-low temperature performance and strength of the matrix asphalt are improved and enhanced, the asphalt cold-filling liquid is diluted by the diluent, a small amount of tackifier and anti-stripping agent are doped, and the asphalt cold-filling liquid is dissolved by the solvent due to the existence of the diluent, so that the viscosity of the composite modified asphalt and the adhesiveness between the composite modified asphalt and aggregate are greatly reduced, and the strength and the water stability performance of an asphalt mixture are further influenced, so that the viscosity of the composite modified asphalt is improved by the tackifier, the adhesiveness between the asphalt cold-filling liquid and the aggregate is improved by the anti-stripping agent, and the road performance of the asphalt cold-filling material is further improved. The reinforcing fibers are doped into the aggregate, so that the reinforcing fibers are distributed in gaps of the aggregate and crosslinked into a whole, a reinforcement effect is achieved on the cold-patch material, when the cold-patch material is deformed under load, stress is transferred to the reinforcing fibers through fiber ends of the aggregate, which are in contact with the aggregate, the stress born on the cold-patch material is reduced, and the deformation of the cold-patch material is reduced, so that the service performance of the cold-patch material, such as high-temperature stability, low-temperature crack resistance, fatigue resistance and the like, is improved, the service life of the cold-patch material is prolonged, and the asphalt cold-patch material with excellent high-low temperature performance, high stability and strength and meeting the requirements of quick traffic is prepared.
According to the application, the matrix asphalt is subjected to composite modification by using the SBR latex and the petroleum resin, the low-temperature ductility of the asphalt can be obviously improved by using the SBR latex, the high-temperature stability and strength of the asphalt can be improved by using the petroleum resin, the petroleum resin is completely solidified in the later period of asphalt cold-patch, and the petroleum resin can be intertwined with an SBR chain structure to form a stable space network structure, so that the stability and strength of the asphalt cold-patch are enhanced, the space network structure is more compact as the petroleum resin blending amount is larger, but the low-temperature ductility of a modified asphalt system is easily influenced because the resin material contains a benzene ring rigid side chain structure, and the brittleness characteristic is obvious. Therefore, the blending amount of the petroleum resin is preferably 4-6%, and the high-low temperature performance of the composite modified asphalt system can be considered, the stability of asphalt cold-patch materials can be enhanced, and the complementary advantage of SBR latex and petroleum resin on the improvement of the matrix asphalt performance can be fully exerted.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of initial stability of asphalt cold feed according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the molding stability of the asphalt cold feed according to the embodiment of the present application;
FIG. 3 is a schematic diagram of dynamic stability of asphalt cold feed according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The existing asphalt cold-patch material has poor high-low temperature stability, is easy to generate segregation phenomenon, has slow strength formation, long road finishing period, poor water stability and poor water damage resistance, and greatly influences the long-term repair quality of local damage of asphalt pavement.
Aiming at the existing technical problems, the embodiment of the application provides an asphalt cold-patch production process, which comprises the following steps:
carrying out composite modification on the matrix asphalt to obtain composite modified asphalt;
adding an adhesion promoter and an anti-stripping agent into the composite modified asphalt, heating and stirring, adding a diluent, uniformly stirring, and cooling to obtain asphalt cold-replenishing liquid;
heating aggregate and reinforcing fiber together, and stirring uniformly to obtain a mixture;
and adding the asphalt cold-replenishing liquid into the mixture, and stirring to obtain the asphalt cold-replenishing material.
According to the application, the matrix asphalt is subjected to composite modification, the high-low temperature performance and strength of the matrix asphalt are improved and enhanced, the asphalt cold-filling liquid is diluted by the diluent, a small amount of tackifier and anti-stripping agent are doped, and the asphalt cold-filling liquid is dissolved by the solvent due to the existence of the diluent, so that the viscosity of the composite modified asphalt and the adhesiveness between the composite modified asphalt and aggregate are greatly reduced, and the strength and the water stability performance of an asphalt mixture are further influenced, so that the viscosity of the composite modified asphalt is improved by the tackifier, the adhesiveness between the asphalt cold-filling liquid and the aggregate is improved by the anti-stripping agent, and the road performance of the asphalt cold-filling material is further improved. The reinforcing fibers are doped into the aggregate, so that the reinforcing fibers are distributed in gaps of the aggregate and crosslinked into a whole, a reinforcement effect is achieved on the cold-patch material, when the cold-patch material is deformed under load, stress is transferred to the reinforcing fibers through fiber ends of the aggregate, which are in contact with the aggregate, the stress born on the cold-patch material is reduced, and the deformation of the cold-patch material is reduced, so that the service performance of the cold-patch material, such as high-temperature stability, low-temperature crack resistance, fatigue resistance and the like, is improved, the service life of the cold-patch material is prolonged, and the asphalt cold-patch material with excellent high-low temperature performance, high stability and strength and meeting the requirements of quick traffic is prepared.
As an embodiment of the present application, the above-mentioned composite modification step for the matrix asphalt includes:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain the composite modified asphalt.
According to the application, the matrix asphalt is subjected to composite modification by using the SBR latex and the petroleum resin, the low-temperature ductility of the asphalt can be obviously improved by using the SBR latex, the high-temperature stability and strength of the asphalt can be improved by using the petroleum resin, the petroleum resin is completely solidified in the later period of asphalt cold-patch, and the petroleum resin can be intertwined with an SBR chain structure to form a stable space network structure, so that the stability and strength of the asphalt cold-patch are enhanced, the space network structure is more compact as the petroleum resin blending amount is larger, but the low-temperature ductility of a modified asphalt system is easily influenced because the resin material contains a benzene ring rigid side chain structure, and the brittleness characteristic is obvious. Therefore, the blending amount of the petroleum resin is preferably 4-6%, and the high-low temperature performance of the composite modified asphalt system can be considered, the stability of asphalt cold-patch materials can be enhanced, and the complementary advantage of SBR latex and petroleum resin on the improvement of the matrix asphalt performance can be fully exerted.
As an embodiment of the application, the diluent is biodiesel, and the blending amount of the diluent is 18-24% of the mass of the matrix asphalt. The application adopts biodiesel, the main component of which is fatty acid methyl ester, is prepared from used or natural vegetable oil and animal fat (such as vegetable oil, soybean oil, rapeseed oil and the like) through a special process, and is an environment-friendly biofuel.
As one embodiment of the present application, the adhesion promoter is terpene resin, and the adhesion promoter is incorporated in an amount of 6-12% by mass of the base asphalt. The terpene resin is a normal temperature tackifier, and is suitable for improving the viscosity of warm-mix asphalt and cold-mix asphalt.
As one embodiment of the present application, the anti-stripping agent is a non-amine anti-stripping agent, and the blending amount of the anti-stripping agent is 0.3 to 0.6% of the mass of the base asphalt. The non-amine anti-stripping agent is environment-friendly, and can effectively improve the adhesiveness between the cold fluid replacement and the aggregate.
As an implementation mode of the application, the steps of adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating and stirring, adding the diluent, stirring uniformly, and cooling to obtain the asphalt cold-replenishing liquid include: adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding the diluent when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature.
As an embodiment of the present application, the reinforcing fiber is a mixture of basalt fiber and polyester fiber, wherein the mass ratio of basalt fiber to polyester fiber is 2:3. because of the existence of the diluent in the asphalt cold-filling liquid, the cold-filling liquid has good fluidity at normal temperature, ensures that the asphalt cold-filling material is mixed and paved at normal temperature or low temperature, but also has the problems of low strength, poor water stability, weak permanent deformation resistance at high temperature and the like of the mixture, which cannot meet the road performance requirements, so reinforcing fibers play a role in reinforcing the cold-filling material, thereby improving the service performance of the cold-filling material such as high-temperature stability, low-temperature crack resistance, fatigue resistance and the like, and prolonging the service life of the cold-filling material. The basalt fiber has the advantages of high strength, high temperature resistance, alkali resistance and the like, can improve the tensile strength and high temperature performance of asphalt cold-patch materials, and can still keep good working performance under alkaline conditions; the polyester fiber has higher elastic modulus and elongation at break, has good flexibility and tensile strength at the low temperature of 40 ℃ below zero, and can greatly improve the elastic recovery capability and the crack resistance of the cold patch material at the low temperature. In addition, due to the adsorption of the polyester fiber on asphalt and water, the viscosity of the cold-filling liquid can be increased, and the penetration of water into the cold-filling material is reduced, so that the water stability of the mixture is improved.
As an embodiment of the present application, the aggregate includes coarse aggregate, fine aggregate and filler, the aggregate is prepared according to LB-13 gradation, and the particle size of the coarse aggregate is greater than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is less than 0.075mm. The coarse aggregate forms a framework structure of asphalt cold-patch, the fine aggregate is used for filling gaps brought by the coarse aggregate when forming a framework, the filler is used for filling gaps of mineral aggregate, preferably, the filler adopts powdery mineral obtained by grinding limestone, so that the gaps of the mineral aggregate can be filled, and a certain alkaline environment can be provided for the aggregate, thereby improving the adhesiveness between cold-patch and the aggregate.
As an embodiment of the present application, the step of heating the aggregate and the reinforcing fiber together and stirring the mixture uniformly to obtain a mixture includes: heating the aggregate and the reinforcing fiber at 75 ℃ for 3-4 hours, and stirring for 180 times at 75 ℃ to obtain the mixture. When the heating temperature of the aggregate is 75 ℃, the asphalt cold patch can be mixed and constructed.
As an embodiment of the present application, the step of adding the asphalt cold-make-up liquid to the mixture and stirring includes: heating the asphalt cold-replenishing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-replenishing liquid into the mixture, and stirring for 90 times. When the heating temperature is too high, volatilization of the diluent can be caused, and the asphalt cold-filling liquid is easy to age, and when the temperature is too low, the asphalt cold-filling liquid cannot reach the flowing liquid state rapidly, and the heating temperature is preferably 65 ℃.
The above technical scheme of the present application will be described in detail with reference to specific embodiments.
Example 1
The asphalt cold-patch production process comprises the following steps:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain composite modified asphalt;
adding terpene resin and non-amine anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding biodiesel when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature to obtain asphalt cold-replenishing liquid, wherein the blending amount of the terpene resin is 6-12% of the mass of matrix asphalt; the blending amount of the non-amine anti-stripping agent is 0.3-0.6% of the mass of the matrix asphalt; the doping amount of the biodiesel is 18-24% of the mass of the matrix asphalt;
heating aggregate and reinforcing fiber for 3-4h at 75 ℃, and stirring for 180 times at 75 ℃ to obtain a mixture, wherein the reinforcing fiber is a mixture of basalt fiber and polyester fiber, and the mass ratio of the basalt fiber to the polyester fiber is 2:3, a step of; the aggregate comprises coarse aggregate, fine aggregate and filler, wherein the aggregate is prepared according to LB-13 grading, and the particle size of the coarse aggregate is more than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is smaller than 0.075mm;
heating the asphalt cold-repairing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-repairing liquid into the mixture, and stirring for 90 times to obtain the asphalt cold-repairing material.
Example 2
The asphalt cold-patch production process comprises the following steps:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain composite modified asphalt;
adding terpene resin and non-amine anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding biodiesel when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature to obtain asphalt cold-replenishing liquid, wherein the blending amount of the terpene resin is 6-12% of the mass of matrix asphalt; the blending amount of the non-amine anti-stripping agent is 0.3-0.6% of the mass of the matrix asphalt; the doping amount of the biodiesel is 18-24% of the mass of the matrix asphalt;
heating aggregate and reinforcing fiber for 3-4h at 75 ℃, and stirring for 180 times at 75 ℃ to obtain a mixture, wherein the reinforcing fiber is a mixture of basalt fiber and polyester fiber, and the mass ratio of the basalt fiber to the polyester fiber is 2:3, a step of; the aggregate comprises coarse aggregate, fine aggregate and filler, wherein the aggregate is prepared according to LB-13 grading, and the particle size of the coarse aggregate is more than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is smaller than 0.075mm;
heating the asphalt cold-repairing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-repairing liquid into the mixture, and stirring for 90 times to obtain the asphalt cold-repairing material.
Example 3
The asphalt cold-patch production process comprises the following steps:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain composite modified asphalt;
adding terpene resin and non-amine anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding biodiesel when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature to obtain asphalt cold-replenishing liquid, wherein the blending amount of the terpene resin is 6-12% of the mass of matrix asphalt; the blending amount of the non-amine anti-stripping agent is 0.3-0.6% of the mass of the matrix asphalt; the doping amount of the biodiesel is 18-24% of the mass of the matrix asphalt;
heating aggregate and reinforcing fiber for 3-4h at 75 ℃, and stirring for 180 times at 75 ℃ to obtain a mixture, wherein the reinforcing fiber is a mixture of basalt fiber and polyester fiber, and the mass ratio of the basalt fiber to the polyester fiber is 2:3, a step of; the aggregate comprises coarse aggregate, fine aggregate and filler, wherein the aggregate is prepared according to LB-13 grading, and the particle size of the coarse aggregate is more than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is smaller than 0.075mm;
heating the asphalt cold-repairing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-repairing liquid into the mixture, and stirring for 90 times to obtain the asphalt cold-repairing material.
Example 4
The asphalt cold-patch production process comprises the following steps:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain composite modified asphalt;
adding terpene resin and non-amine anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding biodiesel when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature to obtain asphalt cold-replenishing liquid, wherein the blending amount of the terpene resin is 6-12% of the mass of matrix asphalt; the blending amount of the non-amine anti-stripping agent is 0.3-0.6% of the mass of the matrix asphalt; the doping amount of the biodiesel is 18-24% of the mass of the matrix asphalt;
heating aggregate and reinforcing fiber for 3-4h at 75 ℃, and stirring for 180 times at 75 ℃ to obtain a mixture, wherein the reinforcing fiber is a mixture of basalt fiber and polyester fiber, and the mass ratio of the basalt fiber to the polyester fiber is 2:3, a step of; the aggregate comprises coarse aggregate, fine aggregate and filler, wherein the aggregate is prepared according to LB-13 grading, and the particle size of the coarse aggregate is more than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is smaller than 0.075mm;
heating the asphalt cold-repairing liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-repairing liquid into the mixture, and stirring for 90 times to obtain the asphalt cold-repairing material.
Comparative example 1
In comparison with example 1, in the step of preparing the composite modified asphalt, no petroleum resin was incorporated, and the other steps were the same.
Comparative example 2
In comparison with example 1, in the step of preparing the composite modified asphalt, SBR latex was not incorporated, and the remaining steps were the same.
Comparative example 3
In comparison with example 1, no reinforcing fiber was added, and the rest of the procedure was the same.
Experimental example
Testing Marshall stability of asphalt Cold feed
The stability of the asphalt cold patch includes initial stability and forming stability. The asphalt cold-patch material is required to reach the effect of paving and passing, so that the asphalt cold-patch material has certain initial stability to meet the requirement of quick traffic after the repair work is completed; with the increase of time, the diluent in the asphalt cold-filling liquid is volatilized slowly, the asphalt cold-filling material starts to be gradually formed, and at the moment, the asphalt cold-filling material has enough capability of resisting permanent deformation generated under the load and the atmospheric factors, namely the forming stability of the cold-filling material.
1. Initial stability
Respectively taking quantitative cold patch materials in experimental examples and comparative examples, and filling the quantitative cold patch materials into a Marshall test mold, and compacting the surfaces of the test pieces for 50 times in turn, wherein the height range of the test pieces is 63.5mm plus or minus 1.3mm; test pieces were tested for Marshall stability immediately after demolding. The test results are shown in FIG. 1.
As can be seen from fig. 1, the initial stability of each group of cold-fill materials is greater than 2KN, and the initial stability value is generally not less than 2KN for the requirement of quick traffic of the cold-fill materials, otherwise, the load of the vehicle borne by open traffic cannot be borne, so each group of cold-fill materials meets the requirement of the initial stability of the cold-fill materials. In contrast, in comparative example 3, no reinforcing fiber was added, which had an initial stability significantly lower than that of the other groups, and since the reinforcing fiber had a reinforcing effect on the cold-patch, no reinforcing fiber was added, which had a large influence on the initial stability of the cold-patch.
2. Stability of molding
Respectively taking quantitative cold patch materials in experimental examples and comparative examples, and filling the quantitative cold patch materials into a Marshall test mold, and compacting the surfaces of the test pieces for 50 times in turn, wherein the height range of the test pieces is 63.5mm plus or minus 1.3mm; placing the side of the test piece in an oven preheated to 110 ℃ for 24 hours, taking out the double-sided alternate compaction of the test piece for 25 times, and standing the test piece on the ground at room temperature for 6-8 hours; after demoulding, the test piece is placed in a constant temperature water tank at 60 ℃ for 30min, wet cloth is used for wiping the moisture on the surface of the test piece, and the Marshall stability is tested. The test results are shown in fig. 2.
As can be seen from fig. 2, the molding stability of each group of cold-patch materials is greater than 4KN, and the molding stability of the cold-patch materials is generally required to be greater than 4KN, so that each group of cold-patch materials meets the requirement for the molding stability of the cold-patch materials. In comparative example 3, no reinforcing fiber was added, which had a certain effect on the molding stability of the cold patch. The comparative example 1, in which no petroleum resin was added, had a large influence on the molding stability of the cold-patch, since the liquid petroleum resin was not completely cured at the initial stage of test piece preparation and the strength effect could not be fully exerted, had little influence on the initial stability of the cold-patch, whereas the petroleum resin was gradually cured with volatilization of the solvent inside the system and intertwined with the SBR chain structure to form a stable space network structure, and therefore, the molding stability in the comparative example 1 was significantly lower than that in the example 1.
(II) testing high temperature stability of asphalt Cold feed
The dynamic stability of the cold patch was measured by a rutting test to evaluate its high temperature performance. The dynamic stability DS of the cold feed is required to be more than or equal to 600. The test results are shown in FIG. 3.
As can be seen from fig. 3, the dynamic stability of each group of rutting samples is greater than 600 times/mm, and the requirements for the dynamic stability of cold-patch materials are satisfied. The dynamic stability of the petroleum resin not added in the comparative example 1 is obviously lower than that of the example 1, and the dynamic stability of the petroleum resin and the reinforcing fiber not added in the comparative example 3 also has a great influence, which proves that the addition of the petroleum resin and the reinforcing fiber can obviously improve and improve the high-temperature stability of the cold-patch.
(III) testing the low-temperature cracking resistance of the asphalt cold-patch material
The method comprises the steps of adopting a mixture bending test to test, simulating a low-temperature condition at the test temperature of minus 10 ℃, loading a trabecular test piece, and measuring the bending tensile strength and the maximum bending tensile strain of the cold patch material, thereby evaluating the cracking resistance of the cold patch material at the low temperature. The maximum tensile bending strain of the cold feed should be greater than 2500 mu epsilon. The test results are shown in Table 1.
TABLE 1
| Group of | Flexural tensile Strength (MPa) | Maximum flexural tensile strain (mu epsilon) | Stiffness modulus (MPa) |
| Example 1 | 8.93 | 4785.24 | 2865.55 |
| Example 3 | 9.14 | 4702.43 | 2685.39 |
| Comparative example 1 | 7.01 | 3453.36 | 2179.54 |
| Comparative example 2 | 6.45 | 2476.74 | 1749.56 |
| Comparative example 3 | 7.37 | 3632.66 | 1965.78 |
As can be seen from Table 1, the maximum tensile strain of the cold feed in comparative example 2 is less than 2500. Mu.. Epsilon. And the other groups meet the requirements; the petroleum resin is not added in the comparative example 1, so that the high-low temperature performance of the cold feed cannot be improved in a coordinated manner; the SBR latex is not mixed in the comparative example 2, and the low-temperature ductility of the cold-patch material can be obviously improved, so that the prepared cold-patch material has poor low-temperature cracking resistance; the comparative example 3 is not added with reinforcing fiber, the flexural tensile strength and the maximum flexural tensile strain are obviously lower than those of the example 1, and the reinforcing fiber can be added to enable the internal structure of the cold patch material to be gradually filled with uniformly dispersed fibers, so that the flexibility of the cold patch material at low temperature is improved and the low-temperature performance is improved under the reinforcement effect of the fibers on the cold patch material and the adsorption effect on the cold patch liquid.
The foregoing description is only of the optional embodiments of the present application, and is not intended to limit the scope of the application, and all the equivalent structural changes made by the description of the present application and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the application.
Claims (10)
1. The asphalt cold-patch production process is characterized by comprising the following steps of:
carrying out composite modification on the matrix asphalt to obtain composite modified asphalt;
adding an adhesion promoter and an anti-stripping agent into the composite modified asphalt, heating and stirring, adding a diluent, uniformly stirring, and cooling to obtain asphalt cold-replenishing liquid;
heating aggregate and reinforcing fiber together, and stirring uniformly to obtain a mixture;
and adding the asphalt cold-patch liquid into the mixture, and stirring to obtain the asphalt cold-patch material.
2. The asphalt cold patch production process according to claim 1, wherein the step of performing composite modification on the matrix asphalt comprises:
heating the matrix asphalt to 120-130 ℃, mixing SBR latex accounting for 3% of the mass of the matrix asphalt, and shearing for 30min at a shearing rate to obtain SBR modified asphalt;
stopping heating, keeping the temperature of the SBR modified asphalt at 90 ℃, doping petroleum resin accounting for 4-6% of the mass of the matrix asphalt, uniformly stirring, and preserving heat and developing for 30-40min at 90 ℃ to obtain the composite modified asphalt.
3. The asphalt cold patch production process according to claim 1, wherein the diluent is biodiesel, and the amount of the diluent added is 18-24% of the mass of the matrix asphalt.
4. The asphalt cold patch production process according to claim 1, wherein the adhesion promoter is a terpene resin, and the adhesion promoter is incorporated in an amount of 6 to 12% by mass of the base asphalt.
5. The asphalt cold patch production process according to claim 1, wherein the anti-stripping agent is a non-amine anti-stripping agent, and the anti-stripping agent is incorporated in an amount of 0.3 to 0.6% by mass of the base asphalt.
6. The asphalt cold-patch production process according to claim 1, wherein the step of adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating and stirring, adding the diluent, stirring uniformly, and cooling to obtain the asphalt cold-patch comprises the following steps: adding the adhesion promoter and the anti-stripping agent into the composite modified asphalt, heating to 80 ℃, stirring for 1-1.5h, stopping heating, adding the diluent when the composite modified asphalt is cooled to 60 ℃, stirring for 1-1.5h, and cooling to room temperature.
7. The asphalt cold feed production process according to claim 1, wherein the reinforcing fiber is a mixture of basalt fiber and polyester fiber, wherein the mass ratio of basalt fiber to polyester fiber is 2:3.
8. the asphalt cold feed production process according to claim 1, wherein the aggregate comprises coarse aggregate, fine aggregate and filler, the aggregate is formulated according to LB-13 grade, the coarse aggregate has a particle size of greater than 2.36mm; the grain diameter of the fine aggregate is 0.075-2.36mm; the particle size of the filler is less than 0.075mm.
9. The asphalt cold patch production process according to claim 1, wherein the step of heating the aggregate and the reinforcing fiber together and stirring the mixture uniformly to obtain a mixture comprises the steps of: heating the aggregate and the reinforcing fiber at 75 ℃ for 3-4 hours, and stirring for 180 times at 75 ℃ to obtain the mixture.
10. The asphalt cold feed production process according to claim 1, wherein the step of adding the asphalt cold feed liquid to the mixture and stirring comprises: heating the asphalt cold-filling liquid at 65 ℃ for 1-1.2h, stirring for 3min, adding the asphalt cold-filling liquid into the mixture, and stirring for 90 times.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117089137A (en) * | 2023-09-11 | 2023-11-21 | 眉山天投新材料有限公司 | Modified asphalt direct-injection agent and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117089137A (en) * | 2023-09-11 | 2023-11-21 | 眉山天投新材料有限公司 | Modified asphalt direct-injection agent and preparation method and application thereof |
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