CN117658530A - Processing technology of environment-friendly anti-cracking color recycled asphalt concrete - Google Patents
Processing technology of environment-friendly anti-cracking color recycled asphalt concrete Download PDFInfo
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- CN117658530A CN117658530A CN202311664478.XA CN202311664478A CN117658530A CN 117658530 A CN117658530 A CN 117658530A CN 202311664478 A CN202311664478 A CN 202311664478A CN 117658530 A CN117658530 A CN 117658530A
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- China
- Prior art keywords
- recycled
- asphalt concrete
- stirring
- asphalt
- coarse aggregate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 69
- 238000012545 processing Methods 0.000 title claims abstract description 17
- 238000005336 cracking Methods 0.000 title claims abstract description 14
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 239000010426 asphalt Substances 0.000 claims abstract description 79
- 239000002699 waste material Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 10
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- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 26
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- 239000003651 drinking water Substances 0.000 claims description 22
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 20
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- 238000002156 mixing Methods 0.000 claims description 19
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
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- QWXYZCJEXYQNEI-OSZHWHEXSA-N intermediate I Chemical compound COC(=O)[C@@]1(C=O)[C@H]2CC=[N+](C\C2=C\C)CCc2c1[nH]c1ccccc21 QWXYZCJEXYQNEI-OSZHWHEXSA-N 0.000 claims description 18
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- SXYFKXOFMCIXQW-UHFFFAOYSA-N propanedioyl dichloride Chemical compound ClC(=O)CC(Cl)=O SXYFKXOFMCIXQW-UHFFFAOYSA-N 0.000 claims description 10
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- KJJPLEZQSCZCKE-UHFFFAOYSA-N 2-aminopropane-1,3-diol Chemical compound OCC(N)CO KJJPLEZQSCZCKE-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 235000019733 Fish meal Nutrition 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- -1 dodecyl-1, 11-dihydroxyl hexasiloxane Chemical compound 0.000 claims description 7
- 239000004467 fishmeal Substances 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 6
- RHNNQENFSNOGAM-UHFFFAOYSA-N 1,8-diisocyanato-4-(isocyanatomethyl)octane Chemical compound O=C=NCCCCC(CN=C=O)CCCN=C=O RHNNQENFSNOGAM-UHFFFAOYSA-N 0.000 claims description 5
- NFPNQEAEXIXGNY-UHFFFAOYSA-N 2,2-dioctylpropane-1,3-diol Chemical compound CCCCCCCCC(CO)(CO)CCCCCCCC NFPNQEAEXIXGNY-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 claims description 4
- 235000020661 alpha-linolenic acid Nutrition 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 229960004488 linolenic acid Drugs 0.000 claims description 4
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 238000012958 reprocessing Methods 0.000 claims description 4
- GWBWGPRZOYDADH-UHFFFAOYSA-N [C].[Na] Chemical compound [C].[Na] GWBWGPRZOYDADH-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 238000004064 recycling Methods 0.000 abstract description 3
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- 239000000047 product Substances 0.000 description 26
- 239000008213 purified water Substances 0.000 description 16
- 238000005303 weighing Methods 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000000967 suction filtration Methods 0.000 description 12
- 238000005406 washing Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
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- 239000011148 porous material Substances 0.000 description 6
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- 238000002360 preparation method Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- 229940035437 1,3-propanediol Drugs 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007112 amidation reaction Methods 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- UNZSHUCNBUBSGW-IFNWOZJISA-M sodium;(9z,12z,15z)-octadeca-9,12,15-trienoate Chemical class [Na+].CC\C=C/C\C=C/C\C=C/CCCCCCCC([O-])=O UNZSHUCNBUBSGW-IFNWOZJISA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2111/40—Porous or lightweight 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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured 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
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a processing technology of environment-friendly anti-crack color recycled asphalt concrete, and belongs to the technical field of asphalt concrete recycling. The invention is used for solving the technical problems that the tear resistance, the water stability and the wear resistance of the recycled asphalt concrete in the prior art are to be further improved, and the processing technology of the environment-friendly anti-crack color recycled asphalt concrete comprises the following steps: step one, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles; and secondly, adding the waste asphalt particles and the regeneration liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 4-6h, and performing post-treatment to obtain a regenerated fine aggregate primary product and a regenerated coarse aggregate primary product. The invention not only effectively improves the cracking resistance and the water stability of the color recycled asphalt concrete, but also improves the color fastness and the wear resistance of the color asphalt concrete.
Description
Technical Field
The invention relates to the technical field of asphalt concrete regeneration, in particular to a processing technology of environment-friendly anti-crack color regenerated asphalt concrete.
Background
Along with the rapid development of urbanization, the requirements of road construction on environmental protection, durability and aesthetic property are continuously improved. The traditional asphalt pavement is easy to be puzzled by problems such as cracks and deformation in the using process, so that the maintenance cost is increased, and the driving safety and the driving experience are negatively influenced. Meanwhile, a large amount of waste asphalt concrete is generated during the repair of the waste asphalt pavement, and the waste asphalt concrete becomes a part of the urban garbage problem.
Colored asphalt concrete is a special road material that has a colored appearance unlike conventional black asphalt concrete. The road material uses special pigment and additive to make it capable of presenting various colors such as red, yellow, green, blue, etc., thus increasing the aesthetic and recognition degree of the road, but the pigment lacks chemical crosslinking with the asphalt concrete, and the color fastness and wear resistance of the existing colored asphalt concrete need to be further improved.
In order to reduce the pollution of waste asphalt concrete to the environment, the waste asphalt concrete is generally recycled, the waste asphalt concrete is converted into useful recycled asphalt materials, the recycling of resources is realized, the environment is more friendly, but in the recycling process of the asphalt concrete, the waste asphalt concrete is crushed through strong mechanical crushing force, a large amount of fine aggregate is adhered to the outside of coarse aggregate and is difficult to separate from the coarse aggregate due to strong adhesiveness of asphalt, the composition ratio of the coarse aggregate and the fine aggregate is difficult to control, the appearance and the internal structure of the aggregate of the asphalt concrete are changed due to strong impact force, pores and microcracks are generated on the surface of the recycled aggregate, the bonding strength between the aggregate and the asphalt is weakened, the pores and the cracks can also lead to the increase of the moisture penetration and oxidation degree of the asphalt concrete, and the aging process is accelerated, so that the tear resistance and the water stability of the recycled asphalt concrete are still to be further improved.
In view of the technical drawbacks of this aspect, a solution is now proposed.
Disclosure of Invention
The invention aims to provide a processing technology of environment-friendly anti-cracking colored recycled asphalt concrete, which is used for solving the technical problems that in the prior art, a large amount of fine aggregates are adhered to the surface of recycled coarse aggregates of recycled asphalt concrete and are difficult to separate from the recycled coarse aggregates, the composition ratio of the coarse aggregates and the fine aggregates of the asphalt concrete is difficult to control, the appearance and the internal structure of the recycled asphalt concrete are changed due to strong impact force when the recycled asphalt concrete is recycled, and pores and microcracks are generated on the surface of the recycled aggregate, so that the tearing resistance and the water stability of the recycled asphalt concrete are required to be further improved, and the color fastness and the wear resistance of the conventional colored asphalt concrete are required to be further improved.
The aim of the invention can be achieved by the following technical scheme:
the processing technology of the environment-friendly anti-crack color recycled asphalt concrete comprises the following steps:
step one, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles;
step two, adding the waste asphalt particles and the regeneration liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 4-6h, and performing post-treatment to obtain a regenerated fine aggregate primary product and a regenerated coarse aggregate primary product;
reprocessing the recycled fine aggregate primary product and the recycled coarse aggregate primary product to obtain recycled fine aggregate and recycled coarse aggregate;
step four, adding petroleum asphalt and foam warm mix agent into a stirring kettle, raising the temperature of the stirring kettle to 150-160 ℃, preserving heat and stirring for 30-50min, equally dividing the recycled coarse aggregate and the recycled fine aggregate into a plurality of parts, adding the recycled coarse aggregate and the recycled fine aggregate into the stirring kettle in an alternating manner, adding powder auxiliary agent and reinforcing fiber into the stirring kettle, preserving heat and stirring for 40-60min, adding pigment into the stirring kettle, preserving heat and stirring for 2-3h, and obtaining the color recycled asphalt concrete.
Further, the regeneration liquid in the second step consists of toluene, N-methyl pyrrolidone, chloroform and sodium glacial acetate according to the dosage of 20mL:8mL:4mL:5g, and the post-treatment operation comprises: after ultrasonic dispersion is completed, skimming scum on the upper layer, filtering, washing a filter cake with absolute ethyl alcohol and drinking water for three times respectively, drying the filter cake to remove a solvent, and screening the filter cake by using a 2.5-mesh screen to obtain a regenerated fine aggregate primary product with the particle size of less than 8mm and a regenerated coarse aggregate primary product with the particle size of more than 8 mm.
Further, the reprocessing operation in the third step includes the steps of:
a1, adding sodium silicate and drinking water into a beaker according to the dosage ratio of 1g to 10mL, and uniformly stirring to obtain a sodium silicate solution;
a2, mixing polyvinyl alcohol and drinking water according to the dosage ratio of 1g: adding 5mL into a beaker, and uniformly stirring to obtain a polyvinyl alcohol solution;
a3, adding the recycled coarse aggregate primary product and the sodium silicate solution into a beaker, stirring for 3-5 hours at room temperature, then adding the polyvinyl alcohol solution into the beaker, stirring for 2-3 hours, and performing post-treatment to obtain the recycled coarse aggregate;
and A4, adding the regenerated fine material primary product and the polyvinyl alcohol solution into a beaker, stirring for 3-5h at room temperature, and performing post-treatment to obtain the regenerated coarse aggregate.
Further, in the step A3, the using amount ratio of the recycled coarse aggregate primary product, the sodium silicate solution and the polyvinyl alcohol solution is 1g:8mL:3mL, and the post-treatment operation comprises: after the reaction is finished, carrying out suction filtration, washing a filter cake with drinking water for 3 times, and then transferring the filter cake into a drying oven with the temperature of 70-80 ℃ to be dried to constant weight, thereby obtaining the regenerated coarse aggregate; the dosage ratio of the regenerated fine aggregate primary product to the polyvinyl alcohol solution in the step A4 is 1g to 6mL, and the post-treatment operation comprises: after the reaction is finished, carrying out suction filtration, washing a filter cake with drinking water for 3 times, and then transferring the filter cake into a drying oven with the temperature of 70-80 ℃ to be dried to constant weight, thus obtaining the regenerated fine aggregate.
Further, the reinforcing fiber is prepared by the following steps:
b1, adding dodecyl-1, 11-dihydroxyl hexasiloxane, 2-dioctyl-1, 3-propylene glycol, 2-amino-1, 3-propylene glycol, malonyl chloride, a catalyst and N-methylpyrrolidone into a three-neck flask, stirring, heating the three-neck flask to 140-150 ℃, carrying out heat preservation reaction for 4-6 hours, and carrying out post treatment to obtain an intermediate I;
the synthesis reaction principle of the intermediate I is as follows:
adding an intermediate I, N-methyl pyrrolidone into a three-neck flask protected by nitrogen, stirring until the system is dissolved, raising the temperature of the three-neck flask to 75-85 ℃, dropwise adding a cross-linking agent into the three-neck flask, carrying out heat preservation reaction for 3-5h after the dropwise adding is finished, and carrying out aftertreatment to obtain composite resin;
the synthetic reaction principle of the composite resin is as follows:
and B3, adding the composite resin into a melt spinning machine for melt spinning, and then performing post-treatment on the spinning fiber to obtain the reinforced fiber.
Further, in the step B1, the dosage ratio of the dodecyl-1, 11-dihydroxyl hexasiloxane, the 2, 2-dioctyl-1, 3-propanediol, the 2-amino-1, 3-propanediol and the malonyl chloride is 2M:6M:3M:11M, the dosage of the N-methyl pyrrolidone is 6 times of the weight of the malonyl chloride, the catalyst is 3 times of the weight of the dodecyl-1, 11-dihydroxyl hexasiloxane, the catalyst is one of potassium carbonate and carbon sodium, and the post-treatment operation comprises: after the reaction is finished, the temperature of the three-mouth flask is reduced to room temperature, purified water is added into the three-mouth flask, stirring is carried out for 30-50min, suction filtration is carried out, a filter cake is sequentially washed by the purified water and absolute ethyl alcohol for 3 times and then is dried, the filter cake is transferred into a drying oven with the temperature of 70-80 ℃, and is dried to constant weight, and the intermediate I is obtained after crushing.
Further, in the step B2, the cross-linking agent is composed of 1, 8-diisocyanato-4- (isocyanatomethyl) octane and N-methyl pyrrolidone according to the dosage ratio of 1g to 4g, the dosage ratio of the intermediate I, N-methyl pyrrolidone to the cross-linking agent is 3g to 10mL to 5g, and the post-treatment operation comprises: after the reaction is finished, the temperature of the three-mouth flask is reduced to room temperature, purified water is added into the three-mouth flask, stirring is carried out for 30-50min, suction filtration is carried out, a filter cake is sequentially washed by the purified water and absolute ethyl alcohol for 3 times and then is dried, the filter cake is transferred into a drying oven with the temperature of 70-80 ℃, and is dried to constant weight, and the composite resin is obtained after crushing.
Further, the melt spinning operation in step B3 includes: adding the composite resin into a melt spinning machine, selecting a spinneret plate with the aperture of 0.2mm, setting the melting temperature to be 620-660 ℃, extruding at the extrusion speed of 350cm < 3 >/min, and cooling and forming through a lateral blowing and an air bath, wherein the post-treatment operation comprises the following steps: placing the fiber yarn obtained by melt spinning on a stretcher, setting the temperature to be 110-120 ℃ and the stretching multiple to be 3.5 times, transferring the fiber to an oven with the temperature of 95-105 ℃ after the stretching is completed, drying for 45-55min, reducing the temperature to room temperature, and cutting the fiber into reinforcing fiber with the length of 2-3 cm.
Further, in the fourth step, the petroleum asphalt, the foam warm mix agent, the recycled coarse aggregate, the recycled fine aggregate, the powder auxiliary agent, the reinforcing fiber and the pigment are mixed according to the dosage ratio of 800-1000g to 30-50g to 3000-3500g to 2800-3200g to 800-900g to 200-300g to 300-400g, the foam warm mix agent is composed of 1.5-2.5g of calcium oxide, 2.5-3.5g of sulfonated sodium linolenate and 3.5-4.5g of fish meal according to the dosage ratio, the powder auxiliary agent is composed of diatomite with the particle size of 3-5 mu m and ore powder with the particle size of 10-20 mu m according to the dosage ratio of 3g to 2g, and the pigment is composed of one or more of iron oxide red, iron oxide yellow, iron oxide green and iron oxide orange.
The invention has the following beneficial effects:
1. in the preparation process, the waste asphalt is subjected to impact crushing by a crusher, the agglomerated waste asphalt is crushed into waste asphalt particles with relatively uniform granular structures, the waste asphalt particles are subjected to activation treatment by a regeneration liquid consisting of toluene, N-methylpyrrolidone, chloroform and sodium glacial acetate, asphalt on the surfaces of the waste asphalt particles is softened and dissolved, under the action of ultrasound, aggregates of the waste asphalt particles are separated from the asphalt, and then the waste asphalt particles are screened by a screen, so that a regenerated coarse aggregate primary product and a regenerated fine aggregate crude product are obtained through separation according to the size difference of apertures; the crushed waste asphalt particles are activated by the regenerated liquid, so that aggregates in the waste asphalt particles can be effectively separated from asphalt, structural damage of the regenerated aggregates caused by high-strength crushing of the traditional waste asphalt is avoided, and separation of coarse aggregates and fine aggregates can be promoted by softening and dissolving the asphalt, and the problem that a large amount of fine aggregates adhere to the surface of the coarse aggregates due to strong adhesion of the asphalt is avoided, so that the uniformity of particle size distribution of the coarse aggregates and the fine aggregates is effectively improved; asphalt is softened and dissolved and separated from recycled aggregate, so that the residual quantity of asphalt on the recycled aggregate can be effectively reduced, different compatibility of asphalt with different sources and components in concrete is avoided, the strength and durability of asphalt concrete are reduced, and when the recycled aggregate is recycled, the whole construction process and formula are not needed, so that the recycled aggregate is more convenient to use.
2. In the preparation process of the environment-friendly anti-cracking colored recycled asphalt concrete, the recycled coarse aggregate primary product is treated by the sodium silicate solution and then is treated by the polyvinyl alcohol solution to obtain the recycled coarse aggregate, and the recycled fine aggregate primary product is treated by the polyvinyl alcohol solution to obtain the recycled fine aggregate; when the sodium silicate solution is used for treating the recycled coarse aggregate primary product, some alkaline components contained on the surface of the recycled coarse aggregate, which are used for adding waste asphalt additives or asphalt, react with the sodium silicate solution to form water and silicate, micropores and microcracks on the surface of the recycled coarse aggregate are filled, and irregular surface areas are filled, so that the surface of the recycled coarse aggregate is smoother and denser, the compactness of the recycled coarse aggregate is improved, the possibility that water enters the interior of the recycled coarse aggregate is reduced, and further ageing and degradation processes of the recycled coarse aggregate are slowed down; the method is characterized in that the recycled coarse aggregate is obtained by coating a polyvinyl alcohol layer on the outer part of the recycled coarse aggregate primary product through the treatment of polyvinyl alcohol, so that the cohesiveness between the recycled coarse aggregate and asphalt can be enhanced, the bonding strength of the recycled coarse aggregate and asphalt in asphalt concrete can be improved, the stripping and slipping phenomena between the recycled coarse aggregate and asphalt can be prevented, and the overall performance and durability of the asphalt concrete can be improved; the polyvinyl alcohol coating layers are coated outside the recycled coarse aggregate and the recycled fine aggregate, so that the hydrophilicity of the recycled aggregate can be improved, the possibility that moisture permeates into the recycled aggregate can be reduced, and the water resistance of the recycled aggregate can be improved; the recycled coarse aggregate and the recycled fine aggregate treated by the polyvinyl alcohol have the advantages that the pores, cracks and the like on the surfaces are modified, the self stability of the recycled coarse aggregate and the recycled fine aggregate is improved, and the recycled coarse aggregate and the petroleum asphalt are uniformly dispersed and mixed, so that the stability of the recycled aggregate is improved, and the deformation and crack resistance of the asphalt concrete is facilitated.
3. In the preparation process, the environment-friendly anti-cracking color regenerated asphalt concrete is prepared by generating an intermediate I of a polyethylenimine chain segment through amidation reaction of dodecyl-1, 11-dihydroxyl hexasiloxane, 2-dioctyl-1, 3-propanediol, 2-amino-1, 3-propanediol and malonyl chloride under the condition of a catalyst, and then further treating the intermediate I by taking a1, 8-diisocyanato-4- (isocyanatomethyl) octane/N-methylpyrrolidone solution as a cross-linking agent to improve the cross-linking degree of a molecular chain of the intermediate I; a large amount of siloxane flexible chain segments are introduced into the intermediate I, so that the softness, high and low temperature resistance and ageing resistance of the composite resin are effectively improved, and more stable chemical bonds can be formed in the fibers through the crosslinking of the composite resin, so that the fibers are less prone to decomposition and melting under high temperature conditions, the thermal stability and high temperature resistance of the fibers are improved, the tensile strength and the wear resistance of the reinforced fibers are improved, and the fiber has better durability.
4. In the preparation process, calcium oxide, sodium sulfonate and fish meal are selected to be compounded to prepare the foam warm mix agent, and when the foam warm mix agent is used, calcium oxide reacts with asphalt molecules in petroleum asphalt to reduce the softening point of the asphalt, so that the petroleum asphalt becomes soft and easy to process at a lower temperature, and components such as sodium sulfonate and fish meal can chemically react or physically act in the petroleum asphalt to cause the arrangement of asphalt molecules to be loose, thereby reducing the viscosity of the asphalt. The viscosity is reduced, so that the asphalt is easier to mix and disperse in the warm mixing process, the warm mixing efficiency is improved, microscopic gaps and pores are formed in the asphalt by promoting the formation of foam in the petroleum asphalt, and the contact area of the asphalt and aggregate is increased, so that the cohesiveness is improved; and the foam warm-mix agent ensures that Volatile Organic Compounds (VOCs) and smell generated in the warm-mix process are less, and compared with the traditional hot-mix asphalt process, the foam warm-mix agent reduces the warm-mix temperature of asphalt, reduces energy consumption and greenhouse gas emission related to asphalt production.
5. In the preparation process, after the petroleum asphalt and the foam warm mix agent are mixed, the recycled coarse aggregate and the recycled fine aggregate are added into the asphalt in an alternate adding mode, so that the coarse aggregate and the fine aggregate are uniformly mixed in the petroleum asphalt, the powder auxiliary agent consisting of ore powder and diatomite and the reinforcing fiber are added, microscopic gaps and pores in the asphalt concrete can be filled, the compactness and strength of the asphalt concrete are improved, and the toughness and the crack resistance of the concrete can be improved by introducing the reinforcing fiber, so that the asphalt concrete has better durability; the fine particles of the diatomite and the ore powder can form a micro-net structure in the asphalt concrete, so that the water loss resistance and the water resistance of the asphalt concrete are improved; the surfaces of the diatomite and the ore powder generally have certain roughness and adsorptivity, and the surfaces of the recycled coarse aggregate, the recycled fine aggregate and the ferric oxide pigment all contain a large number of active functional groups, so that covalent bond crosslinking is formed among the recycled coarse aggregate, the recycled fine aggregate, the powder auxiliary agent, the pigment and the petroleum asphalt due to physical and chemical adsorption in the asphalt concrete, and the cohesive force and the crack resistance of the asphalt concrete are improved.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The processing technology of the environment-friendly anti-cracking color recycled asphalt concrete provided by the embodiment comprises the following steps:
s1, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles.
S2, adding toluene, N-methylpyrrolidone, chloroform and sodium glacial acetate into a beaker according to the dosage of 20mL:8mL:4mL:5g, and uniformly mixing to obtain a regeneration liquid;
adding waste asphalt particles and regenerated liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 4h, skimming upper scum after ultrasonic dispersion is completed, filtering, washing a filter cake with absolute ethyl alcohol and drinking water for three times respectively, drying the filter cake to remove a solvent, and screening the filter cake by using a 2.5-mesh screen to obtain a regenerated fine aggregate primary product with the particle size of less than 8mm and a regenerated coarse aggregate primary product with the particle size of more than 8 mm.
S3, adding sodium silicate and 10mL of drinking water into a beaker according to the dosage ratio of 1g to 10mL, and uniformly stirring to obtain a sodium silicate solution;
adding polyvinyl alcohol and drinking water into a beaker according to the dosage ratio of 1g to 5mL, and uniformly stirring to obtain a polyvinyl alcohol solution;
weighing: adding 100g of a regenerated coarse aggregate primary product and 800mL of sodium silicate solution into a beaker, stirring for 3h at room temperature, then adding 300mL of polyvinyl alcohol solution into the beaker, stirring for 2h, after the reaction is completed, carrying out suction filtration, washing a filter cake with drinking water for 3 times, and then transferring the filter cake into a drying oven with the temperature of 70 ℃ for drying to constant weight to obtain regenerated coarse aggregate;
weighing: 100g of the primary regenerated fine material and 600mL of polyvinyl alcohol solution are added into a beaker, stirred for 3 hours at room temperature, filtered by suction, the filter cake is washed for 3 times by drinking water, and then the filter cake is transferred into a drying box with the temperature of 70 ℃ to be dried to constant weight, so that the regenerated fine aggregate is obtained.
S4, weighing: adding 33.2g of dodecyl-1, 11-dihydroxohexasiloxane, 180g of 2, 2-dioctyl-1, 3-propylene glycol, 27.3g of 2-amino-1, 3-propylene glycol, 155g of malonyl chloride, 99.6g of potassium carbonate and 930g of N-methylpyrrolidone into a three-neck flask, stirring, heating the three-neck flask to 140 ℃, preserving the temperature for 4 hours, reducing the temperature of the three-neck flask to room temperature after the reaction is finished, adding 100mL of purified water into the three-neck flask, stirring for 30min, suction-filtering, washing a filter cake with the purified water and absolute ethyl alcohol for 3 times in sequence, suction-drying, transferring the filter cake into a drying box with the temperature of 70 ℃, drying to constant weight, and crushing to obtain an intermediate I;
adding 1, 8-diisocyanato-4- (isocyanatomethyl) octane and N-methyl pyrrolidone into a beaker according to the dosage ratio of 1g to 4g, and uniformly mixing to obtain a cross-linking agent;
weighing: 300g of intermediate I and 1000mL of N-methylpyrrolidone are added into a three-neck flask protected by nitrogen, the three-neck flask is stirred until the system is dissolved, the temperature of the three-neck flask is increased to 75 ℃, 500g of cross-linking agent is dripped into the three-neck flask, the three-neck flask is subjected to heat preservation reaction for 3 hours after the dripping is finished, the temperature of the three-neck flask is reduced to room temperature, 2000mL of purified water is added into the three-neck flask, the three-neck flask is stirred for 30 minutes, suction filtration is performed, a filter cake is sequentially washed for 3 times by the purified water and absolute ethyl alcohol and then is dried, the filter cake is transferred into a drying box with the temperature of 70 ℃ and is dried to constant weight, and the composite resin is obtained after the filter cake is crushed;
adding the composite resin into a melt spinning machine, selecting a spinneret plate with the aperture of 0.2mm, setting the melting temperature to 620 ℃ and setting the melting temperature to 350cm 3 After extrusion at extrusion speed/min, the molding was cooled by means of a side blow and an air bath, and the post-treatment operation included: and (3) placing the fiber yarn obtained by melt spinning on a stretcher, setting the temperature to be 110 ℃, stretching the fiber yarn by 3.5 times, transferring the fiber yarn into a baking oven with the temperature of 95 ℃ after stretching, drying the fiber yarn for 45 minutes, reducing the temperature to room temperature, and cutting the fiber yarn into reinforced fiber with the length of 2-3 cm.
S5, evenly mixing diatomite with the particle size of 3-5 mu m and ore powder with the particle size of 10-20 mu m according to the dosage ratio of 3g to 2g to obtain a powder auxiliary agent;
adding calcium oxide, sodium sulfonate linolenic acid and fish meal into a beaker according to the dosage ratio of 1.5g to 2.5g to 3.5g, and uniformly mixing to obtain a foam warm-mix agent;
weighing: adding 8kg of petroleum asphalt and 300g of foam warm-mixing agent into a stirring kettle, raising the temperature of the stirring kettle to 150 ℃, keeping the temperature and stirring for 30min, equally dividing 30kg of recycled coarse aggregate and 28kg of recycled fine aggregate into a plurality of parts, adding 8kg of powder auxiliary agent and 2kg of reinforcing fiber into the stirring kettle in an alternating manner, keeping the temperature and stirring for 40min, adding 3kg of iron oxide red into the stirring kettle, keeping the temperature and stirring for 2h, and obtaining the color recycled asphalt concrete.
Example 2
The processing technology of the environment-friendly anti-cracking color recycled asphalt concrete provided by the embodiment comprises the following steps:
s1, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles.
S2, adding toluene, N-methylpyrrolidone, chloroform and sodium glacial acetate into a beaker according to the dosage of 20mL:8mL:4mL:5g, and uniformly mixing to obtain a regeneration liquid;
adding waste asphalt particles and regenerated liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 5h, skimming upper scum after ultrasonic dispersion is completed, filtering, washing a filter cake with absolute ethyl alcohol and drinking water for three times respectively, drying the filter cake to remove a solvent, and screening the filter cake by using a 2.5-mesh screen to obtain a regenerated fine aggregate primary product with the particle size of less than 8mm and a regenerated coarse aggregate primary product with the particle size of more than 8 mm.
S3, adding sodium silicate and 10mL of drinking water into a beaker according to the dosage ratio of 1g to 10mL, and uniformly stirring to obtain a sodium silicate solution;
adding polyvinyl alcohol and drinking water into a beaker according to the dosage ratio of 1g to 5mL, and uniformly stirring to obtain a polyvinyl alcohol solution;
weighing: adding 100g of a regenerated coarse aggregate primary product and 800mL of a sodium silicate solution into a beaker, stirring for 4 hours at room temperature, then adding 300mL of a polyvinyl alcohol solution into the beaker, stirring for 2.5 hours, after the reaction is completed, carrying out suction filtration, washing a filter cake with drinking water for 3 times, and then transferring the filter cake into a drying oven with the temperature of 75 ℃ for drying to constant weight to obtain a regenerated coarse aggregate;
weighing: 100g of the primary regenerated fine material and 600mL of polyvinyl alcohol solution are added into a beaker, stirred for 4 hours at room temperature, filtered by suction, the filter cake is washed for 3 times by drinking water, and then the filter cake is transferred into a drying box with the temperature of 75 ℃ to be dried to constant weight, so that the regenerated fine aggregate is obtained.
S4, weighing: adding 33.2g of dodecyl-1, 11-dihydroxohexasiloxane, 180g of 2, 2-dioctyl-1, 3-propylene glycol, 27.3g of 2-amino-1, 3-propylene glycol, 155g of malonyl chloride, 99.6g of carbon sodium and 930g of N-methylpyrrolidone into a three-neck flask, stirring, heating the three-neck flask to 145 ℃, preserving heat for 5 hours, reducing the temperature of the three-neck flask to room temperature after the reaction is finished, adding 100mL of purified water into the three-neck flask, stirring for 40 minutes, carrying out suction filtration, washing a filter cake with the purified water and absolute ethyl alcohol for 3 times in sequence, then carrying out suction drying, transferring the filter cake into a drying box with the temperature of 75 ℃, drying to constant weight, and crushing to obtain an intermediate I;
adding 1, 8-diisocyanato-4- (isocyanatomethyl) octane and N-methyl pyrrolidone into a beaker according to the dosage ratio of 1g to 4g, and uniformly mixing to obtain a cross-linking agent;
weighing: 300g of intermediate I and 1000mL of N-methylpyrrolidone are added into a three-neck flask protected by nitrogen, the three-neck flask is stirred until the system is dissolved, the temperature of the three-neck flask is increased to 80 ℃, 500g of cross-linking agent is dripped into the three-neck flask, the three-neck flask is subjected to heat preservation reaction for 4 hours after the dripping is finished, the temperature of the three-neck flask is reduced to room temperature, 2000mL of purified water is added into the three-neck flask, the three-neck flask is stirred for 40min, suction filtration is performed, a filter cake is sequentially washed for 3 times by the purified water and absolute ethyl alcohol and then is dried, the filter cake is transferred into a drying box with the temperature of 75 ℃ and is dried to constant weight, and the composite resin is obtained after the filter cake is crushed;
adding the composite resin into a melt spinning machine, selecting a spinneret plate with the aperture of 0.2mm, setting the melting temperature to 640 ℃ and setting the melting temperature to 350cm 3 After extrusion at extrusion speed/min, the molding was cooled by means of a side blow and an air bath, and the post-treatment operation included: placing the fiber obtained by melt spinning on a stretcher, setting the temperature to 115 ℃ and the stretching multiple to 3.5 times, transferring the fiber into a baking oven with the temperature of 100 ℃ after stretching, drying for 50min, reducing the temperature to room temperature, and obtaining the fiberCutting into reinforcing fiber with length of 2-3 cm.
S5, evenly mixing diatomite with the particle size of 3-5 mu m and ore powder with the particle size of 10-20 mu m according to the dosage ratio of 3g to 2g to obtain a powder auxiliary agent;
adding calcium oxide, sodium sulfonate linolenic acid and fish meal into a beaker according to the dosage ratio of 2g to 3g to 4g, and uniformly mixing to obtain a foam warm-mix agent;
weighing: adding 9kg of petroleum asphalt and 400g of foam warm-mixing agent into a stirring kettle, raising the temperature of the stirring kettle to 155 ℃, carrying out heat preservation and stirring for 40min, equally dividing 33kg of recycled coarse aggregate and 30kg of recycled fine aggregate into a plurality of parts, adding 8.5kg of powder auxiliary agent and 2.5kg of reinforcing fiber into the stirring kettle in an alternating manner, adding 3.5kg of iron oxide yellow into the stirring kettle after carrying out heat preservation and stirring for 50min, and carrying out heat preservation and stirring for 2.5h to obtain the color regenerated asphalt concrete.
Example 3
The processing technology of the environment-friendly anti-cracking color recycled asphalt concrete provided by the embodiment comprises the following steps:
s1, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles.
S2, adding toluene, N-methylpyrrolidone, chloroform and sodium glacial acetate into a beaker according to the dosage of 20mL:8mL:4mL:5g, and uniformly mixing to obtain a regeneration liquid;
adding waste asphalt particles and regenerated liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 6h, skimming upper scum after ultrasonic dispersion is completed, filtering, washing a filter cake with absolute ethyl alcohol and drinking water for three times respectively, drying the filter cake to remove a solvent, and screening the filter cake by using a 2.5-mesh screen to obtain a regenerated fine aggregate primary product with the particle size of less than 8mm and a regenerated coarse aggregate primary product with the particle size of more than 8 mm.
S3, adding sodium silicate and 10mL of drinking water into a beaker according to the dosage ratio of 1g to 10mL, and uniformly stirring to obtain a sodium silicate solution;
adding polyvinyl alcohol and drinking water into a beaker according to the dosage ratio of 1g to 5mL, and uniformly stirring to obtain a polyvinyl alcohol solution;
weighing: adding 100g of a regenerated coarse aggregate primary product and 800mL of sodium silicate solution into a beaker, stirring for 5h at room temperature, then adding 300mL of polyvinyl alcohol solution into the beaker, stirring for 3h, after the reaction is completed, carrying out suction filtration, washing a filter cake with drinking water for 3 times, and then transferring the filter cake into a drying oven with the temperature of 80 ℃ for drying to constant weight to obtain regenerated coarse aggregate;
weighing: 100g of the primary regenerated fine material and 600mL of polyvinyl alcohol solution are added into a beaker, stirred for 5h at room temperature, pumped and filtered, a filter cake is washed for 3 times by drinking water, and then the filter cake is transferred into a drying box with the temperature of 80 ℃ to be dried to constant weight, so that the regenerated fine aggregate is obtained.
S4, weighing: adding 33.2g of dodecyl-1, 11-dihydroxohexasiloxane, 180g of 2, 2-dioctyl-1, 3-propylene glycol, 27.3g of 2-amino-1, 3-propylene glycol, 155g of malonyl chloride, 99.6g of potassium carbonate and 930g of N-methylpyrrolidone into a three-neck flask, stirring, heating the three-neck flask to 150 ℃, preserving heat for 6 hours, reducing the temperature of the three-neck flask to room temperature after the reaction is finished, adding 100mL of purified water into the three-neck flask, stirring for 50 minutes, carrying out suction filtration, washing a filter cake with the purified water and absolute ethyl alcohol for 3 times in sequence, then carrying out suction drying, transferring the filter cake into a drying box with the temperature of 80 ℃, drying to constant weight, and crushing to obtain an intermediate I;
adding 1, 8-diisocyanato-4- (isocyanatomethyl) octane and N-methyl pyrrolidone into a beaker according to the dosage ratio of 1g to 4g, and uniformly mixing to obtain a cross-linking agent;
weighing: 300g of intermediate I and 1000mL of N-methylpyrrolidone are added into a three-neck flask protected by nitrogen, the three-neck flask is stirred until the system is dissolved, the temperature of the three-neck flask is increased to 85 ℃, 500g of cross-linking agent is dripped into the three-neck flask, the three-neck flask is subjected to heat preservation reaction for 5 hours after the dripping is finished, the temperature of the three-neck flask is reduced to room temperature, 2000mL of purified water is added into the three-neck flask, the three-neck flask is stirred for 50 minutes, suction filtration is carried out, a filter cake is sequentially washed for 3 times by the purified water and absolute ethyl alcohol and then is dried, the filter cake is transferred into a drying box with the temperature of 80 ℃ and is dried to constant weight, and the composite resin is obtained after the filter cake is crushed;
adding the composite resin into a melt spinning machine, selecting a spinneret plate with the aperture of 0.2mm, setting the melting temperature to 660 ℃ so as to350cm 3 After extrusion at extrusion speed/min, the molding was cooled by means of a side blow and an air bath, and the post-treatment operation included: and (3) placing the fiber yarn obtained by melt spinning on a stretcher, setting the temperature to 120 ℃ and the stretching multiple to 3.5 times, transferring the fiber to an oven with the temperature of 105 ℃ after stretching, drying for 55min, reducing the temperature to room temperature, and cutting the fiber into reinforced fiber with the length of 2-3 cm.
S5, evenly mixing diatomite with the particle size of 3-5 mu m and ore powder with the particle size of 10-20 mu m according to the dosage ratio of 3g to 2g to obtain a powder auxiliary agent;
adding calcium oxide, sodium sulfonate linolenic acid and fish meal into a beaker according to the dosage ratio of 2.5g to 3.5g to 4.5g, and uniformly mixing to obtain a foam warm-mix agent;
weighing: adding 10kg of petroleum asphalt and 500g of foam warm-mixing agent into a stirring kettle, raising the temperature of the stirring kettle to 160 ℃, keeping the temperature and stirring for 50min, equally dividing 35kg of recycled coarse aggregate and 32kg of recycled fine aggregate into a plurality of parts, adding 9kg of powder auxiliary agent and 3kg of reinforcing fiber into the stirring kettle in an alternating manner, keeping the temperature and stirring for 60min, adding 4kg of ferric oxide green into the stirring kettle, keeping the temperature and stirring for 3h, and obtaining the color recycled asphalt concrete.
Comparative example 1
The present comparative example is different from example 3 in that step S3 is omitted, and the recycled coarse aggregate and the recycled fine aggregate in step S5 are replaced by the recycled coarse aggregate primary product and the recycled fine aggregate primary product prepared in step S2, respectively, in equal amounts.
Comparative example 2
The present comparative example is different from example 3 in that step S4 is eliminated and reinforcing fibers are not added in step S5.
Comparative example 3
The present comparative example differs from example 3 in that the recycled coarse aggregate and the recycled fine aggregate in step S5 are replaced by the same amount of coarse aggregate and fine aggregate, respectively, having the same particle size;
comparative example 4
The present comparative example is different from comparative example 3 in that step S4 is eliminated and reinforcing fibers are not added in step S5.
Performance test:
the color recycled asphalt concrete prepared in examples 1-3 and comparative examples 1-4 was tested for crack resistance and water stability, wherein the maximum load N, tensile bending strength MPa and maximum stretch bending strain mu epsilon of the test sample were measured with reference to the standard GB/T38948-2020 asphalt mixture Low temperature crack resistance evaluation method; the water stability performance is that the color recycled asphalt concrete is molded into a standard Marshall test piece by using a Marshall compaction device, the standard Marshall test piece is placed at room temperature for 12h for demoulding for later use, the test piece is placed in a constant-temperature water bath box at 60 ℃ for 48h after demoulding, the test piece is subjected to loading test by using a Marshall tester, the stability values of the test piece before and after soaking are measured, and specific test results are shown in the following table:
data analysis:
the comparative analysis of the data of examples 1-3 and comparative examples 1-4 shows that the color recycled asphalt concrete prepared by the invention effectively improves the crack resistance and water stability of the color recycled asphalt concrete after the asphalt concrete is recycled, and the color asphalt concrete prepared by the invention has no macroscopic color difference change when a sample is subjected to 15000 rolling experiments, thus indicating that the color asphalt concrete prepared by the invention has good color fastness and wear resistance.
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (9)
1. The processing technology of the environment-friendly anti-crack color recycled asphalt concrete is characterized by comprising the following steps of:
step one, adding the waste asphalt collected by the waste asphalt into a reaction crusher for reaction crushing to obtain waste asphalt particles;
step two, adding the waste asphalt particles and the regeneration liquid into an iron barrel according to the dosage ratio of 3g to 15mL, performing ultrasonic dispersion for 4-6h, and performing post-treatment to obtain a regenerated fine aggregate primary product and a regenerated coarse aggregate primary product;
reprocessing the recycled fine aggregate primary product and the recycled coarse aggregate primary product to obtain recycled fine aggregate and recycled coarse aggregate;
step four, adding petroleum asphalt and foam warm mix agent into a stirring kettle, raising the temperature of the stirring kettle to 150-160 ℃, preserving heat and stirring for 30-50min, equally dividing the recycled coarse aggregate and the recycled fine aggregate into a plurality of parts, adding the recycled coarse aggregate and the recycled fine aggregate into the stirring kettle in an alternating manner, adding powder auxiliary agent and reinforcing fiber into the stirring kettle, preserving heat and stirring for 40-60min, adding pigment into the stirring kettle, preserving heat and stirring for 2-3h, and obtaining the color recycled asphalt concrete.
2. The processing technology of the environment-friendly anti-cracking color recycled asphalt concrete is characterized in that the recycled liquid in the second step consists of toluene, N-methylpyrrolidone, chloroform and sodium glacial acetate according to the dosage of 20mL:8mL:4mL:5 g.
3. The process for processing environment-friendly anti-crack color recycled asphalt concrete according to claim 1, wherein the reprocessing operation in the third step comprises the following steps:
a1, adding sodium silicate and drinking water into a beaker according to the dosage ratio of 1g to 10mL, and uniformly stirring to obtain a sodium silicate solution;
a2, mixing polyvinyl alcohol and drinking water according to the dosage ratio of 1g: adding 5mL into a beaker, and uniformly stirring to obtain a polyvinyl alcohol solution;
a3, adding the recycled coarse aggregate primary product and the sodium silicate solution into a beaker, stirring for 3-5 hours at room temperature, then adding the polyvinyl alcohol solution into the beaker, stirring for 2-3 hours, and performing post-treatment to obtain the recycled coarse aggregate;
and A4, adding the regenerated fine material primary product and the polyvinyl alcohol solution into a beaker, stirring for 3-5h at room temperature, and performing post-treatment to obtain the regenerated coarse aggregate.
4. The process for processing the environment-friendly anti-cracking colored recycled asphalt concrete according to claim 3, wherein the dosage ratio of the recycled coarse aggregate primary product, the sodium silicate solution and the polyvinyl alcohol solution in the step A3 is 1g:8mL:3mL; the dosage ratio of the regenerated fine aggregate primary product to the polyvinyl alcohol solution in the step A4 is 1g to 6mL.
5. The process for preparing environment-friendly anti-crack color recycled asphalt concrete according to claim 1, wherein the reinforcing fiber is prepared by the following steps:
b1, adding dodecyl-1, 11-dihydroxyl hexasiloxane, 2-dioctyl-1, 3-propylene glycol, 2-amino-1, 3-propylene glycol, malonyl chloride, a catalyst and N-methylpyrrolidone into a three-neck flask, stirring, heating the three-neck flask to 140-150 ℃, carrying out heat preservation reaction for 4-6 hours, and carrying out post treatment to obtain an intermediate I;
adding an intermediate I, N-methyl pyrrolidone into a three-neck flask protected by nitrogen, stirring until the system is dissolved, raising the temperature of the three-neck flask to 75-85 ℃, dropwise adding a cross-linking agent into the three-neck flask, carrying out heat preservation reaction for 3-5h after the dropwise adding is finished, and carrying out aftertreatment to obtain composite resin;
and B3, adding the composite resin into a melt spinning machine for melt spinning, and then performing post-treatment on the spinning fiber to obtain the reinforced fiber.
6. The process for processing environment-friendly anti-cracking color recycled asphalt concrete according to claim 5, wherein in the step B1, the dosage ratio of the dodecyl-1, 11-dihydroxyhexasiloxane, the 2, 2-dioctyl-1, 3-propanediol, the 2-amino-1, 3-propanediol and the malonyl chloride is 2M:6M:3M:11M, the dosage of the N-methylpyrrolidone is 6 times of the weight of the malonyl chloride, the catalyst is 3 times of the weight of the dodecyl-1, 11-dihydroxyhexasiloxane, and the catalyst is one of potassium carbonate and carbon sodium.
7. The process for processing the environment-friendly anti-cracking color recycled asphalt concrete according to claim 5, wherein the cross-linking agent in the step B2 consists of 1, 8-diisocyanato-4- (isocyanatomethyl) octane and N-methylpyrrolidone according to the dosage ratio of 1g to 4g, and the dosage ratio of the intermediate I, N-methylpyrrolidone to the cross-linking agent is 3g to 10mL to 5g.
8. The process for producing environment-friendly anti-crack color recycled asphalt concrete according to claim 5, wherein the melt spinning operation in step B3 comprises: adding the composite resin into a melt spinning machine, selecting a spinneret plate with the aperture of 0.2mm, setting the melting temperature to be 620-660 ℃ and setting the melting temperature to be 350cm 3 After extrusion at extrusion speed/min, the molding was cooled by means of a side blow and an air bath, and the post-treatment operation included: placing the fiber obtained by melt spinning on a stretcher, setting the temperature to be 110-120 ℃ and the stretching multiple to be 3.5 times, and transferring the fiber to the temperature of 95-1 after the stretching is completedDrying in an oven at 05deg.C for 45-55min, cooling to room temperature, and cutting into reinforcing fiber with length of 2-3 cm.
9. The processing technology of the environment-friendly anti-cracking colored recycled asphalt concrete is characterized in that in the fourth step, the petroleum asphalt, a foam warm mix agent, recycled coarse aggregate, recycled fine aggregate, a powder auxiliary agent, reinforcing fibers and pigments are mixed according to the dosage ratio of 800-1000g to 30-50g to 3000-3500g to 2800-3200g to 800-900g to 200-300g to 300-400g, the foam warm mix agent is composed of calcium oxide, sodium sulfonate linolenic acid and fish meal according to the dosage ratio of 1.5-2.5g to 3.5-4.5g, the powder auxiliary agent is composed of diatomite with the particle size of 3-5 mu m and ore powder with the particle size of 10-20 mu m according to the dosage ratio of 3g to 2g, and the pigments are composed of one or more of iron oxide red, iron oxide yellow, iron oxide green and iron oxide orange.
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