CN114956673A - Asphalt pavement steel slag cold-patch material and preparation method thereof - Google Patents
Asphalt pavement steel slag cold-patch material and preparation method thereof Download PDFInfo
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- CN114956673A CN114956673A CN202210802177.8A CN202210802177A CN114956673A CN 114956673 A CN114956673 A CN 114956673A CN 202210802177 A CN202210802177 A CN 202210802177A CN 114956673 A CN114956673 A CN 114956673A
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- cold
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- aggregate
- asphalt
- steel slag
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- 239000010426 asphalt Substances 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 239000000463 material Substances 0.000 title claims abstract description 61
- 239000002893 slag Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 49
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229920000180 alkyd Polymers 0.000 claims abstract description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 21
- 210000002268 wool Anatomy 0.000 claims description 20
- 238000010008 shearing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000008096 xylene Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000002637 fluid replacement therapy Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000010438 granite Substances 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 230000008439 repair process Effects 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 19
- 239000000203 mixture Substances 0.000 description 19
- 238000012360 testing method Methods 0.000 description 11
- 238000010998 test method Methods 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004342 Benzoyl peroxide Substances 0.000 description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- DFYKHEXCUQCPEB-UHFFFAOYSA-N butyl 2-methylprop-2-enoate;styrene Chemical compound C=CC1=CC=CC=C1.CCCCOC(=O)C(C)=C DFYKHEXCUQCPEB-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- -1 early strength Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a steel slag cold-patch material for an asphalt pavement and a preparation method thereof. The cold-patch material consists of aggregate and cold-patch liquid, wherein the aggregate accounts for 85-92 parts, and the cold-patch liquid accounts for 8-15 parts, and the cold-patch liquid consists of 71-84 wt% of asphalt, 10-20 wt% of dimethylbenzene, 3-6 wt% of acrylic acid modified alkyd resin, 2 wt% of polystyrene-butyl methacrylate and 1 wt% of polystyrene-butyl acrylate. The invention overcomes the defects of low initial strength and insufficient water damage resistance of the existing cold-patch material, and realizes effective extension of the service time of the cold-patch material through rapid repair of self cracks when the service performance of the cold-patch material is reduced.
Description
Technical Field
The invention belongs to the technical field of road repair, and particularly relates to a steel slag cold-patch material for an asphalt pavement and a preparation method thereof.
Background
In the technical field of road repair, a direct mat facing method, a milling and polishing new material spreading method and a patching method are used as traditional asphalt pavement repairing methods to solve the problem of damage of pavement diseases, but the three repairing methods have high repairing cost and long construction period, and the repairing result may change the original pavement structure. The front end of the prior pavement repairing technology, such as a micro surfacing technology and an on-site hot recycling repairing technology of asphalt mixture, has short construction period, and can further optimize the pavement performance on the basis of not changing the original pavement structure. However, the two road surface repairing technologies have high maintenance cost and complex process, which limits the application of the technology on ordinary roads.
The repairing technology is a hot repairing method, and is simple, mature in construction process and good in pit repairing effect. However, in the case of a road surface having a small repair amount and scattered pits, the repair method is difficult to repair and high in cost. The cold-patch material is used as a storable asphalt mixture, has the characteristic of normal and low temperature use and a rapid and convenient repairing process, and provides an effective solution for the defects in the aspect of repairing the hot-mix asphalt mixture.
At present, the cold-patch asphalt mixture is not well researched at home and abroad, and the performance characteristics of the cold-patch asphalt mixture, such as early strength, water stability and durability after cold patch repair, have larger differences from those of a hot-mix asphalt mixture. In addition, after the cold patching material is repaired, if cracks occur in the cold patching material, the repairing effect is greatly reduced, and the damaged part needs to be repaired again after milling, so that the consumption of manpower and material resources is caused.
Disclosure of Invention
The invention provides a bituminous pavement steel slag cold-patch material and a preparation method thereof for solving the technical problems. The cold-patch material can overcome the defects of low initial strength and insufficient water damage resistance of the existing cold-patch material.
In order to achieve the purpose, the invention adopts the technical scheme that:
the cold-patch material for the asphalt pavement steel slag comprises 85-92 parts of aggregate and 8-15 parts of cold-patch liquid, wherein the cold-patch liquid comprises 71-84 wt% of asphalt, 10-20 wt% of xylene, 3-6 wt% of acrylic acid modified alkyd resin, 2 wt% of polystyrene-butyl methacrylate and 1 wt% of polystyrene-butyl acrylate.
Preferably, the acid value of the acrylic modified alkyd resin is not greater than 10mg KOH/g.
Preferably, the asphalt pavement steel slag cold-patch further comprises steel wool fibers, and the mass of the steel wool fibers is 1% -2% of the sum of the mass of the aggregate and the mass of the cold-patch liquid.
Preferably, the aggregate comprises limestone aggregate, basalt aggregate, granite aggregate, diabase aggregate or steel slag aggregate.
Preferably, the aggregate may have a maximum nominal particle size of 9.5mm, 13.2mm, 16mm or 19mm, the aggregate being a graded aggregate.
Preferably, the diameter of the steel wool fiber is 0.1mm, and the length of the steel wool fiber is not more than 2 mm.
The preparation method of the asphalt pavement steel slag cold-patch material comprises the following steps:
1) preheating asphalt, placing the preheated asphalt in an iron shearing cup, and placing the shearing cup in an oil bath device to heat and preserve heat in a high-speed shearing instrument at the temperature of 115-130 ℃;
2) after the constant temperature is preset for a preset time, removing the heating device, setting the rotating speed of the shearing instrument at 300-;
3) the aggregate, steel wool fiber and asphalt cold-patch liquid which are designed according to the grading are mixed evenly and then are mixed to obtain the steel slag cold-patch material.
Preferably, the pitch is preheated in an oven at 115 ℃ to 130 ℃ for 1.8 to 2.5 hours in step 1).
Preferably, the temperature is kept for 3-7min in the step 2), and the shearing is carried out for 1-3 min.
Preferably, the step 3) is performed for 1-2 min.
The xylene of the invention is used as a diluent and a solvent, can simultaneously dilute the asphalt, reduce the viscosity of the asphalt and simultaneously dissolve the acrylic acid modified alkyd resin. When the cold-patch material is used, the cold-patch material is filled into a corresponding pit slot, xylene volatilizes, asphalt thickens, and meanwhile, the characteristics of quick drying and high adhesiveness of the acrylic acid modified alkyd resin are utilized, so that the strength of the cold-patch material is rapidly improved, and meanwhile, the cold-patch material is tightly combined with the original asphalt pavement, and the purposes of rapid and convenient repair are achieved. Moreover, the polystyrene-butyl methacrylate and the polystyrene-butyl acrylate are used as a dispersing agent and a bonding agent, so that the fusion speed of the additive and the cold patch asphalt can be further accelerated, the adhesion of the asphalt and the aggregate can be enhanced, and the strength and the water damage resistance of the cold patch liquid can be improved. Meanwhile, the cold-patch material can realize that the strength reaches the maximum value within 1 h. When the crack is repaired, a coil which is electrified with 150kHz alternating current is arranged at a position 10mm above the crack, and the steel wool fiber generates eddy current by the alternating magnetic field generated by the coil, so that the fiber generates heat, the asphalt is heated, and the crack is healed.
Compared with the prior art, the invention has the beneficial effects that: the invention overcomes the defects of low initial strength and insufficient water damage resistance of the existing cold-patch material, and realizes effective extension of the service time of the cold-patch material by quickly repairing the crack of the cold-patch material when the service performance of the cold-patch material is reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following examples, the acrylic modified alkyd resin was selected from the Laiyang Hongan chemical, under the designation HD 108.
The preparation method of polystyrene-butyl acrylate selected in the following examples is as follows:
butyl acrylate and styrene are used as reaction monomers, and water is used as a dispersion medium to carry out polymerization reaction in the presence of zinc stearate and benzoyl peroxide. The total weight of all materials added in the reaction is 100 percent, and the weight percentages of all the materials added are respectively as follows: 35-45% of butyl acrylate, 2.5-5% of styrene, 1-2% of zinc stearate, 0.5-1% of benzoyl peroxide and 50-60% of water. The reaction temperature of the polymerization reaction is 80 ℃ to 90 ℃. The reaction time of the polymerization reaction is 8-10 h. The specific process comprises the steps of firstly dissolving zinc stearate in water, adding a mixed solution of butyl acrylate, styrene and benzoyl peroxide, and reacting after the addition is finished to obtain the polystyrene butyl acrylate.
The preparation method of polystyrene-butyl methacrylate selected in the following examples is as follows:
mixing methacrylic acid and n-butanol according to a mass ratio of 72: 74 under the catalysis of sulfuric acid, salting out and rectifying to obtain the butyl methacrylate finished product. Then polymerizing the styrene and the butyl methacrylate in the triangular flask, carrying out oil bath at the temperature of 120-130 ℃, and removing residual monomers under reduced pressure to obtain the polystyrene-butyl methacrylate.
Example 1
The embodiment provides an asphalt pavement cold-patch material, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades (4.5% of oilstone ratio), and the cold-patch liquid consists of 85 parts of the steel slag aggregate and 15 parts of the cold-patch liquid. The cold-patch liquid consists of 73 percent of asphalt, 20 percent of dimethylbenzene, 4 percent of acrylic acid modified alkyd resin, 2 percent of polystyrene-butyl methacrylate and 1 percent of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent (namely 1 part) of the cold-patch material is also included. The cold-patch was then prepared using the following steps:
1) preheating asphalt in a 120 ℃ oven for 2h, placing the asphalt in an iron shearing cup, and placing the shearing cup in an oil bath device to heat and preserve heat in a high-speed shearing instrument at 120 ℃.
2) And (3) after keeping the temperature for 5min, removing the heating device, setting the rotating speed of the shearing instrument at 500r/min, sequentially adding xylene and acrylic acid modified alkyd resin according to the proportion, and shearing for 1-3min to obtain the asphalt cold fluid replacement.
3) Uniformly mixing the aggregate, the steel wool fiber and the asphalt cold-patch liquid which are designed according to the gradation, and stirring for 1-2min to obtain the cold-patch liquid.
In order to test the crack repairing capability of the test piece, the cold-patch material is subjected to double-face compaction for 50 times, then is cured in a 110-DEG oven for 24 hours, is taken out and then is subjected to double-face compaction for 25 times, and is placed at room temperature for 24 hours. And then carrying out an indirect tensile strength test at a test temperature of 5 ℃ to break the test piece, arranging a coil which is electrified with 150kHz alternating current at a position 10mm above the test piece to increase the temperature of the test piece to 90 ℃, carrying out an indirect tensile strength test at the test temperature of 5 ℃, and testing and calculating the strength ratio of the heated and the heated strength, namely the strength recovery rate.
Example 2
The embodiment provides an asphalt pavement cold-patch material, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades (4.5% of oilstone ratio), and the cold-patch liquid consists of 85 parts of the steel slag aggregate and 15 parts of the cold-patch liquid. The cold-patch liquid consists of 71 percent of xylene, 20 percent of acrylic acid modified alkyd resin, 2 percent of polystyrene-butyl methacrylate and 1 percent of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent of cold-feeding material (namely 1 part) is also included. The preparation and test procedure were the same as in example 1.
Example 3
The embodiment provides an asphalt pavement cold-patch material, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades (4.5% of oilstone ratio), and the cold-patch liquid consists of 90 parts of the steel slag aggregate and 10 parts of the cold-patch liquid. The cold-patch liquid consists of 76% of asphalt, 17% of dimethylbenzene, 4% of acrylic acid modified alkyd resin, 2% of polystyrene-butyl methacrylate and 1% of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent (namely 1 part) of the cold-patch material is also included. The preparation and test procedure were the same as in example 1.
Example 4
The embodiment provides an asphalt pavement cold-patch material, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades (4.5% of oilstone ratio), and the cold-patch liquid consists of 92 parts of the steel slag aggregate and 8 parts of the cold-patch liquid. The cold-patch liquid consists of 84% of asphalt, 18% of dimethylbenzene, 5% of acrylic acid modified alkyd resin, 2% of polystyrene-butyl methacrylate and 1% of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent (namely 1 part) of the cold-patch material is also included. The preparation and test procedure were the same as in example 1.
Example 5
The embodiment provides an asphalt pavement cold-patch material, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades (4.5% of oilstone ratio), and the steel slag aggregate and the cold-patch liquid respectively consist of 88 parts of the steel slag aggregate and 12 parts of the cold-patch liquid. The cold-patch liquid consists of 84% of asphalt, 10% of dimethylbenzene, 3% of acrylic acid modified alkyd resin, 2% of polystyrene-butyl methacrylate and 1% of polystyrene-butyl acrylate. In addition, steel wool fiber with 2 percent (namely 2 parts) of the weight of the cold-patch material is also included. The preparation and test procedure were the same as in example 1.
Comparative example 1
The comparative example provides a cold-patch material for an asphalt pavement, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades, and each component comprises 85 parts of the steel slag aggregate and 15 parts of the cold-patch liquid. The cold-patch liquid consists of 73% of asphalt, 20% of xylene and 7% of acrylic acid modified alkyd resin. In addition, steel wool fiber with the weight of 1% of cold-patch material is also included. The preparation and test procedure were the same as in example 1.
Comparative example 2
The comparative example provides a cold-patch material for an asphalt pavement, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades, and each component comprises 90 parts of the steel slag aggregate and 10 parts of the cold-patch liquid. The cold-patch liquid consists of 76% of asphalt, 17% of dimethylbenzene and 7% of waterborne alkyd resin. The preparation and test procedure were the same as in example 1.
Comparative example 3
The comparative example provides a bituminous pavement cold patching material, which comprises a steel slag aggregate and a cold patching liquid, wherein the steel slag aggregate consists of LB-13 grades, and each component comprises 85 parts of the steel slag aggregate and 15 parts of the cold patching liquid. The cold-patch liquid consists of 73% of asphalt, 20% of dimethylbenzene, 4% of waterborne alkyd resin, 2% of polystyrene-butyl methacrylate and 1% of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent (namely 1 part) of the cold-patch material is also included. The preparation and test procedure were the same as in example 1.
Comparative example 4
The comparative example provides a cold-patch material for an asphalt pavement, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades, and each component comprises 85 parts of the steel slag aggregate and 15 parts of the cold-patch liquid. The cold-patch liquid consists of 73% of asphalt, 20% of dimethylbenzene, 4% of waterborne alkyd resin and 3% of polystyrene-butyl methacrylate. In addition, steel wool fiber with the weight of 1 percent of cold-feeding material (namely 1 part) is also included. The preparation and test procedure were the same as in example 1.
Comparative example 5
The comparative example provides a cold-patch material for an asphalt pavement, which comprises a steel slag aggregate and a cold-patch liquid, wherein the steel slag aggregate consists of LB-13 grades, and each component comprises 85 parts of the steel slag aggregate and 15 parts of the cold-patch liquid. The cold-patch liquid consists of 73% of asphalt, 20% of dimethylbenzene, 4% of waterborne alkyd resin and 3% of polystyrene-butyl acrylate. In addition, steel wool fiber with the weight of 1 percent (namely 1 part) of the cold-patch material is also included. The preparation and test procedure were the same as in example 1.
TABLE 1 index of performance of steel slag cold-patch material
TABLE 2 comparative example steel slag cold-patch performance index
From the test results in Table 1, it can be seen that the residual stability and the freeze-thaw split tensile strength ratio of the 5 cold patch materials are maintained at higher levels, and that the residual stability and the freeze-thaw split tensile strength ratio of the cold patch materials without addition polymerization of styrene-butyl methacrylate and polystyrene-butyl acrylate are poorer than the performance of the steel slag asphalt cold patch material of the invention. This shows that the steel slag cold-patch of the invention has better water damage resistance. Particularly, the initial stability after mixing was 75% or more of the stability after curing, while the early strength of the comparative example was far from that of the examples. The cold-patch material has the characteristics of quick drying, high early strength, high viscosity and the like.
The strength recovery rates of the cold-patch materials of the five examples exceed 80 percent, and the strength recovery rates of the comparative examples are about 70 percent basically, which shows that the steel slag asphalt cold-patch material of the invention has good capability of repairing cracks and can effectively prolong the service time of the cold-patch material. Comparative example 1 the composition of the conventional asphalt pavement cold patch does not contain polystyrene-butyl methacrylate and polystyrene-butyl acrylate, so that the strength and water damage resistance of the asphalt mixture are not high. This therefore results in poor performance of the comparative example.
The comparative example 2 is the asphalt cold patch asphalt mixture of the water-based alkyd resin, and it can be seen that the water damage resistance, the water resistance and the cohesiveness of the asphalt cold patch asphalt mixture of the invention are higher than those of the asphalt cold patch asphalt mixture of the water-based alkyd resin, and the polystyrene-butyl methacrylate and the polystyrene-butyl acrylate are used as a dispersant and a binder to further accelerate the fusion speed of the additive and the cold patch asphalt, strengthen the adhesion of the asphalt and the aggregate, and simultaneously improve the strength of the cold patch and the water damage resistance.
Comparative example 3 is the asphalt cold patch mixture blended with water-based alkyd resin, and it can be seen that the performance of the asphalt mixture is improved after the addition of polystyrene-butyl methacrylate and polystyrene-butyl acrylate, but the synergistic effect of the water-based alkyd resin with polystyrene-butyl methacrylate and polystyrene-butyl acrylate is slightly inferior to that of the acrylic acid modified alkyd resin, which also results in the asphalt cold patch of comparative example 3 having inferior water stability or durability, cohesiveness, etc. compared with example 1.
Comparative examples 4 to 5, in which only polystyrene-butyl methacrylate and only polystyrene-butyl acrylate were added, respectively, show that the improvement of the water stability and the water resistance of the mixture in the asphalt cold patch containing only polystyrene-butyl methacrylate was not large, and only the cohesiveness was greatly improved. The water stability and the water resistance of the mixture in the asphalt cold fluid replacement only containing polystyrene-butyl acrylate have larger improvement range, but the improvement range of cohesiveness is not large, and the performance improvement range of the asphalt mixture in the asphalt cold fluid replacement only containing polystyrene-butyl methacrylate or only containing polystyrene-butyl acrylate is far less than that when the polystyrene-butyl methacrylate and the polystyrene-butyl acrylate are simultaneously combined. Therefore, the synergistic effect of the two can be seen to have greater influence on the performance of the cold-patch asphalt mixture.
The above embodiments are merely examples for clearly illustrating the present invention and do not limit the present invention. Other variants and modifications of the invention, which are obvious to those skilled in the art and can be made on the basis of the above description, are not necessary or exhaustive for all embodiments, and are therefore within the scope of the invention.
Claims (10)
1. The asphalt pavement steel slag cold-patch material is characterized by comprising 85-92 parts of aggregate and 8-15 parts of cold-patch liquid, wherein the cold-patch liquid comprises 71-84 wt% of asphalt, 10-20 wt% of xylene, 3-6 wt% of acrylic acid modified alkyd resin, 2 wt% of polystyrene-butyl methacrylate and 1 wt% of polystyrene-butyl acrylate.
2. The asphalt pavement steel slag cold patch according to claim 1, wherein the acid value of the acrylic acid modified alkyd resin is not greater than 10mg KOH/g.
3. The asphalt pavement steel slag cold-patch as claimed in claim 1, wherein the asphalt pavement steel slag cold-patch further comprises steel wool fiber, and the mass of the steel wool fiber is 1-2% of the sum of the mass of the aggregate and the mass of the cold-patch liquid.
4. The asphalt pavement steel slag cold patch of claim 1, wherein the aggregate comprises limestone aggregate, basalt aggregate, granite aggregate, diabase aggregate, or steel slag aggregate.
5. The asphalt pavement steel slag cold-patch according to claim 1, wherein the aggregate has a maximum nominal particle size of 9.5mm, 13.2mm, 16mm or 19mm, and is a graded aggregate.
6. The asphalt pavement steel slag cold-patch according to claim 1, wherein the steel wool fiber has a diameter of 0.1mm and a length of not more than 2 mm.
7. The preparation method of the asphalt pavement steel slag cold-patch material as claimed in claim 1, characterized by comprising the following steps:
1) preheating asphalt, placing the preheated asphalt in an iron shearing cup, and placing the shearing cup in an oil bath device to heat and preserve heat in a high-speed shearing instrument at the temperature of 115-130 ℃;
2) after the constant temperature is preset for time, removing the heating device, setting the rotating speed of the shearing instrument at 300-500r/min, sequentially adding dimethylbenzene and acrylic acid modified alkyd resin, polystyrene-butyl methacrylate and polystyrene-butyl acrylate according to the proportion, and shearing to obtain the asphalt cold fluid replacement;
3) the aggregate, steel wool fiber and asphalt cold-patch liquid which are designed according to the grading are mixed evenly and then are mixed to obtain the steel slag cold-patch material.
8. The method of claim 7, wherein the pitch in step 1) is preheated in an oven at 115 ℃ to 130 ℃ for 1.8 to 2.5 hours.
9. The method according to claim 7, wherein the temperature is maintained for 3-7min and the shearing is performed for 1-3min in step 2).
10. The method according to claim 7, wherein the mixing in step 3) is performed for 1 to 2 min.
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| CN102660005A (en) * | 2012-05-08 | 2012-09-12 | 新疆红山涂料有限公司 | Preparation method of acrylic modified alkyd resin |
| KR101488799B1 (en) * | 2013-09-12 | 2015-02-04 | 도경건설 주식회사 | A high early strength concrete compositions using modified emulsified asphalt and method of bridge deck pavement using the same |
| CN107721262A (en) * | 2017-10-31 | 2018-02-23 | 李建州 | A kind of road cold repairing asphalt mixture and preparation method thereof |
| CN110330270A (en) * | 2019-07-05 | 2019-10-15 | 武汉理工大学 | A kind of steel slag cold-repairing material and preparation method thereof |
| CN113264716A (en) * | 2021-06-07 | 2021-08-17 | 泉州永盛工程质量检测有限公司 | Road repairing asphalt mixture and construction method thereof |
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2022
- 2022-07-08 CN CN202210802177.8A patent/CN114956673A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660005A (en) * | 2012-05-08 | 2012-09-12 | 新疆红山涂料有限公司 | Preparation method of acrylic modified alkyd resin |
| KR101488799B1 (en) * | 2013-09-12 | 2015-02-04 | 도경건설 주식회사 | A high early strength concrete compositions using modified emulsified asphalt and method of bridge deck pavement using the same |
| CN107721262A (en) * | 2017-10-31 | 2018-02-23 | 李建州 | A kind of road cold repairing asphalt mixture and preparation method thereof |
| CN110330270A (en) * | 2019-07-05 | 2019-10-15 | 武汉理工大学 | A kind of steel slag cold-repairing material and preparation method thereof |
| CN113264716A (en) * | 2021-06-07 | 2021-08-17 | 泉州永盛工程质量检测有限公司 | Road repairing asphalt mixture and construction method thereof |
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