CN115849769B - Asphalt mixture for urban road and preparation method thereof - Google Patents
Asphalt mixture for urban road and preparation method thereof Download PDFInfo
- Publication number
- CN115849769B CN115849769B CN202211527472.3A CN202211527472A CN115849769B CN 115849769 B CN115849769 B CN 115849769B CN 202211527472 A CN202211527472 A CN 202211527472A CN 115849769 B CN115849769 B CN 115849769B
- Authority
- CN
- China
- Prior art keywords
- steel slag
- parts
- asphalt mixture
- modified steel
- asphalt
- Prior art date
- 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.)
- Active
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 129
- 239000000203 mixture Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 63
- 239000002893 slag Substances 0.000 claims abstract description 131
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 123
- 239000010959 steel Substances 0.000 claims abstract description 123
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 31
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000004927 clay Substances 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 239000010881 fly ash Substances 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 8
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 7
- 239000008116 calcium stearate Substances 0.000 claims abstract description 7
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000008188 pellet Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 52
- 239000002699 waste material Substances 0.000 claims description 39
- 239000003607 modifier Substances 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 238000005338 heat storage Methods 0.000 claims description 16
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 13
- 239000004033 plastic Substances 0.000 claims description 13
- 239000002041 carbon nanotube Substances 0.000 claims description 12
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 229940085675 polyethylene glycol 800 Drugs 0.000 claims description 11
- 239000011324 bead Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 235000010755 mineral Nutrition 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- 229920000728 polyester Polymers 0.000 claims description 9
- 239000005871 repellent Substances 0.000 claims description 9
- 230000002940 repellent Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 150000003505 terpenes Chemical class 0.000 claims description 8
- 235000007586 terpenes Nutrition 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 239000003623 enhancer Substances 0.000 claims description 5
- 239000012782 phase change material Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 5
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000011800 void material Substances 0.000 abstract description 13
- 238000010257 thawing Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 20
- 239000012744 reinforcing agent Substances 0.000 description 12
- 239000011384 asphalt concrete Substances 0.000 description 10
- 230000035699 permeability Effects 0.000 description 9
- 239000011148 porous material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007710 freezing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000003776 cleavage reaction Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000007017 scission Effects 0.000 description 4
- -1 basalt Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010920 waste tyre Substances 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- FCZCIXQGZOUIDN-UHFFFAOYSA-N ethyl 2-diethoxyphosphinothioyloxyacetate Chemical compound CCOC(=O)COP(=S)(OCC)OCC FCZCIXQGZOUIDN-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- QIIDATRCGITYRZ-UHFFFAOYSA-N Catalpol Natural products OCC1OC(OC2OC=CC3C(O)C(=C(CO)C23)O)C(O)C(O)C1O QIIDATRCGITYRZ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- LHDWRKICQLTVDL-PZYDOOQISA-N catalpol Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@H]1[C@@H]2[C@@]3(CO)O[C@H]3[C@@H](O)[C@@H]2C=CO1 LHDWRKICQLTVDL-PZYDOOQISA-N 0.000 description 1
- UXSACQOOWZMGSE-UHFFFAOYSA-N catalposide Natural products OC1C(O)C(O)C(CO)OC1OC1C2C3(CO)OC3C(OC(=O)C=3C=CC(O)=CC=3)C2C=CO1 UXSACQOOWZMGSE-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 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
- 238000000748 compression moulding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- LHDWRKICQLTVDL-UHFFFAOYSA-N methyl iridoid glycoside Natural products OC1C(O)C(O)C(CO)OC1OC1C2C3(CO)OC3C(O)C2C=CO1 LHDWRKICQLTVDL-UHFFFAOYSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000003361 porogen Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- Road Paving Structures (AREA)
Abstract
The application relates to the field of highway building materials, and particularly discloses an asphalt mixture for a city road and a preparation method thereof. The asphalt mixture for the urban road comprises the following components in parts by weight: 5-8 parts of asphalt, 4-8 parts of filler, 92-100 parts of modified steel slag and 0.2-0.4 part of fiber stabilizer; the preparation method of the modified steel slag comprises the following steps: grinding the steel slag and the diatomite, drying clay, grinding the clay into powder, uniformly mixing the powder with the ground steel slag and the ground diatomite, adding silicon carbide, fly ash, manganese dioxide, calcium stearate and water, uniformly mixing, and granulating to obtain a green ball; preheating green pellets at 400-450deg.C for 20-30min, heating to 1000-1100deg.C, and sintering for 10-20min. The asphalt mixture for the urban road has the advantages of high void ratio, high Marshall stability, good rut resistance effect, strong freeze thawing resistance, capability of reducing the temperature of the road surface and relieving the heat island effect.
Description
Technical Field
The application relates to the technical field of highway building materials, in particular to an asphalt mixture for a city road and a preparation method thereof.
Background
In recent years, asphalt pavement is rapidly developed due to excellent road performance and comfortable driving performance, more than 90% of the asphalt pavement established at present is designed according to a dense grading principle, and the asphalt pavement belongs to dense asphalt concrete pavement with small design porosity, and the pavement structure has the characteristics of compactness and difficulty in water permeation, so that urban groundwater cannot be supplemented by rainfall, the ecological system of the ground is influenced, and the balance of the urban ecological system is broken; the rainwater is gathered on the road surface in a large amount, so that urban traffic is blocked, and flood control pressure of an urban drainage system is increased; asphalt concrete is densely matched as an anti-slip surface layer, accumulated water on the road surface is not discharged, water mist and glare are easily caused, and floating and slipping are easily generated when a motor vehicle passes, so that the anti-slip performance and the driving safety of the road surface are seriously affected. Therefore, more and more scholars and experts are widely researching permeable asphalt pavement.
At present, the pervious asphalt concrete has high price due to natural stones such as basalt, limestone and the like, has little or no reserves in most areas, and adopts steel slag discharged in the steelmaking process as coarse aggregate, and does not add fine aggregate or contains a very small amount of fine aggregate, so that the interior of the pervious asphalt concrete is filled with a small amount of fine aggregate, so that the surface and the interior of the pervious asphalt concrete have more pores and high water permeability, but the pervious asphalt concrete also has insufficient strength and freeze-thawing resistance and poor rutting resistance.
Aiming at the related technology, the inventor finds how to apply the steel slag to the permeable asphalt mixture, so that not only the transparent water permeability of asphalt is improved, but also the strength and the freezing resistance in the asphalt are the problems to be solved.
Disclosure of Invention
The application provides an asphalt mixture for urban roads and a preparation method thereof, aiming at improving the strength and freezing resistance of asphalt mixed with steel slag.
In a first aspect, the application provides an asphalt mixture for urban roads, which adopts the following technical scheme:
the asphalt mixture for the urban road comprises the following components in parts by weight: 5-8 parts of asphalt, 4-8 parts of filler, 92-100 parts of modified steel slag, 0.2-0.4 part of fiber stabilizer and 0.5-0.8 part of water repellent;
the preparation method of the modified steel slag comprises the following steps:
grinding steel slag and diatomite, drying clay, grinding the clay into powder, uniformly mixing the powder with the ground steel slag and diatomite, adding silicon carbide, fly ash, manganese dioxide, calcium stearate and water, uniformly mixing, granulating, and drying for 10-24 hours to obtain green balls; preheating the green pellets for 20-30min at 400-450 ℃, heating to 1000-1100 ℃, and sintering for 10-20min to obtain the modified steel slag.
By adopting the technical scheme, the modified steel slag is used for replacing coarse aggregates and fine aggregates, asphalt is used as a binding material, the adhesive force of the asphalt and the modified steel slag is improved under the action of a filler, the coating uniformity of the asphalt on the surface of the modified steel slag is improved, and the porous structure on the surface of the modified steel slag ensures that the steel slag has larger specific surface area, and the contact area between the modified steel slag and water is increased, so that the water absorption rate of the steel slag is improved, and the water permeability of an asphalt mixture is improved; the modified steel slag is prepared by grinding steel slag and diatomite under the action of mechanical force, the specific surface area is increased, the activity is improved, clay can provide skeleton components for the modified steel slag when the raw slag is calcined, ferric oxide and carbonate in the steel slag can generate certain expansion force in the raw slag so as to promote the expansion of the raw slag, the content of organic matters and fluxing components in the coal ash and diatomite is higher, the organic matters are carbonized in the preheating process, a certain amount of gas can be released in the raw slag calcining process, the expansion force of the raw slag is rapidly increased, the fluxing components can reduce the sintering temperature of the raw slag, and therefore, the addition of the coal ash and the diatomite not only provides gas generating components for the modification of the steel slag, but also effectively reduces the calcining temperature of the steel slag, and the ferric oxide and the carbonate in the steel slag such as calcium carbonate and magnesium carbonate in the steel slag can generate oxygen and carbon dioxide at high temperature so as to increase the expansion force, so as to promote the expansion of the raw slag, and further form silicon carbide in the silicon dioxide in the modified slag, and the silicon carbide is further formed in the silicon carbide layer at 1000 ℃ and the inside the silicon carbide, thereby forming the silicon carbide layer is formed, and the silicon carbide is further formed, and the silicon carbide is formed and the silicon carbide is more compact; the silicon carbide can promote the dissolution of calcium, iron and aluminum phases in the steel slag in a molten liquid phase, improve the intermolecular diffusion capacity, promote the generation of gelled minerals, generate crystals such as mullite, quartz, soda lime feldspar and the like on the surface of the steel slag, and form a hard shell mainly comprising glass bodies on the surface of the modified steel slag, so that the strength of the modified steel slag is improved, and the addition of the water repellent can enable water in the asphalt material to be rapidly discharged, so that the deicing performance of the pavement is improved, and the freezing resistance is improved.
Optionally, the modified steel slag comprises the following raw materials in parts by weight: 3-3.2 parts of steel slag, 0.6-1 part of silicon carbide, 2-3 parts of fly ash, 1.5-1.7 parts of diatomite, 5-8 parts of clay, 0.5-0.8 part of calcium stearate, 0.3-0.5 part of manganese dioxide and 10-15 parts of water.
By adopting the technical scheme, the raw materials with the above amounts are mixed and sintered to prepare the modified steel slag, which has high surface hardness and contains open pores communicated with the inside and the outside, is convenient for water penetration, and improves the strength and freezing resistance in asphalt.
Optionally, the silicon carbide is pretreated by:
10-20 parts of silicon carbide is put into 0.1-0.2 part of sodium carboxymethyl cellulose aqueous solution with the concentration of 2-2.5wt percent, after being uniformly stirred, 4-5 parts of adhesion enhancer is added, after being uniformly mixed, the mixture is pressed, molded and crushed.
By adopting the technical scheme, the adhesion reinforcing agent is adhered to the surface of the silicon carbide by utilizing the aqueous solution of sodium carboxymethyl cellulose, so that the adhesion reinforcing agent is distributed on the surface of the silicon carbide as much as possible, when the green pellets are sintered, the adhesion reinforcing agent can form an adhesion reinforcing film with high pore connectivity on the surface of the silicon carbide without blocking pores among particles, the silicon carbide can generate carbon dioxide when the green pellets are calcined, the porosity of the modified steel slag is increased, and the silicon carbide has a certain porous structure after being calcined, so that the water permeability of the modified steel slag is enhanced.
Optionally, the adhesion enhancer is prepared by mixing 0.7-0.75 weight parts of acidified carbon nanotubes, 1.8-2.45 weight parts of silica and 1.5-1.8 weight parts of alumina.
By adopting the technical scheme, the acidified carbon nano tube, the silicon dioxide and the aluminum oxide are used as the adhesion reinforcing agent, and the high-temperature sintering process contains the glass phase and the mullite, so that a large amount of glass phase is generated, the sintered adhesion reinforcing agent can be uniformly adhered on silicon carbide particles without blocking pores among the particles, the thermal shock resistance and creep resistance of the silicon carbide can be improved, the addition of the acidified carbon nano tube is beneficial to liquid phase sintering densification, and the compressive strength of the silicon carbide is increased under the condition that the porosity of the silicon carbide is not influenced.
Preferably, the particle size of the adhesion enhancer is 1-5 μm.
By adopting the technical scheme, the adhesion reinforcing agent with smaller particle size can be distributed more uniformly on the surface of the silicon carbide, so that the surface of the silicon carbide adhered with the adhesion reinforcing agent is more round, the edge angle of the silicon carbide is reduced, and the adhesion reinforcing agent is distributed uniformly on the surface of the silicon carbide.
Optionally, the asphalt mixture further comprises 30-40 parts by weight of strength modifier, wherein the strength modifier is prepared by the following method:
1-3 parts of hollow glass beads are treated by a silane coupling agent KH570, and then mixed with 3-6 parts of waste rubber powder for extrusion and granulation;
uniformly mixing 1-2 parts of phase-change heat storage particles, 0.1-0.3 part of terpene resin and 3-5 parts of water, uniformly spraying on the waste rubber particles, heating to 105-110 ℃, stirring, and cooling to room temperature to obtain pretreated waste rubber particles;
10-15 parts of waste plastic, 0.5-1 part of sodium bicarbonate and 1-1.5 parts of acrylic acid-2-hydroxyethyl ester are mixed together and extruded for granulation to prepare the strength modifier.
According to the technical scheme, the strength modifier with multiple holes and high strength is used for improving the strength and water permeability of asphalt, firstly, the hollow glass beads with light weight, high strength and heat insulation are treated by the silane coupling agent KH570, the KH570 can form a relatively uniform coupling interface on the surfaces of the hollow glass beads so as to improve the compatibility between the hollow glass beads and waste rubber powder, the waste rubber powder forms a coating layer on the surfaces of the hollow glass beads to prepare waste rubber powder particles, then the waste rubber powder particles are adhered with phase-change heat storage particles by using terpene resin, the phase-change heat storage particles can regulate the temperature of asphalt pavement at high temperature in summer, the heat stability diseases such as rutting, pushing and the like of asphalt due to higher pavement temperature are reduced, the organic volatile matter content released to the atmosphere by the pavement is reduced, and the urban heat island effect is relieved; finally, the waste plastic, the pretreated waste rubber particles, sodium bicarbonate and the like are mixed and extruded, the waste plastic can be coated on the pretreated particles, a certain gap exists between the waste plastic and the pretreated particles due to the existence of the phase-change heat storage particles, and a certain pore is formed on the waste plastic by using the sodium bicarbonate as a pore-forming agent.
Optionally, the particle size of the phase-change heat storage particles is 1-3mm, and the expanded graphite is used as a wall material, and the polyethylene glycol 800 is used as a phase-change material.
Through adopting above-mentioned technical scheme, expanded graphite is the wall material, polyethylene glycol 800 is core phase change material, expanded graphite can combine together through hydrogen bond and capillary hole adsorption with polyethylene glycol 800, and expanded graphite can play the limit effect to the polyethylene glycol after melting, prevents the seepage of liquid, and the high thermal conductivity of expanded graphite can reduce polyethylene glycol 800's supercooling degree, and phase change heat storage granule can play the effect of adjusting temperature in reinforcing modifier, reduces asphalt pavement temperature, reduces thermal stability diseases such as pavement rutting, lapse, slows down urban heat island effect.
Optionally, the modified steel slag is composed of the following grading specifications: modified steel slag fine aggregate A with the grain size of 1-2.36mm, modified steel slag fine aggregate B with the grain size of 2.36-4.75 mm, modified steel slag coarse aggregate A with the grain size of 4.75-9.5 mm and modified steel slag coarse aggregate B with the grain size of 9.5-16 mm;
the mass ratio of the modified steel slag fine aggregate A to the modified steel slag fine aggregate B to the modified steel slag coarse aggregate A to the modified steel slag coarse aggregate B is 1-1.4:0.01-0.5:3.6-4.4:3.8-5.
By adopting the technical scheme, the multistage modified steel slag can be mutually overlapped in the asphalt mixture to form a framework, and the strength of the asphalt pavement can be improved.
Optionally, the filler comprises mineral powder and slaked lime, and the mass ratio of the mineral powder to the slaked lime is 5-6:1.
By adopting the technical scheme, the mineral powder and the slaked lime can increase the cohesiveness of the asphalt mixture and increase the strength and stability of the asphalt pavement.
Preferably, the fiber stabilizer is one or a combination of several of polyester fiber, basalt fiber and lignin fiber.
Through adopting the technical scheme, the polyester fiber, the basalt fiber and the lignin fiber have larger specific surface area, more asphalt can be adsorbed, the thickness of asphalt on the surface of modified steel slag is increased, the fibers are mutually wound in the asphalt mixture, a three-dimensional net structure is formed after mixing, the supporting force and durability of a system are enhanced, the permeable asphalt mixture is not easy to cause pore blocking phenomenon after being extruded by a travelling crane at high temperature, so that the permeable asphalt mixture can keep better water permeability, the cohesive strength and tensile strength of the asphalt mixture and the cohesive force between aggregate and asphalt can be improved, the low-temperature crack resistance of the permeable asphalt mixture can be improved, the crack resistance of the asphalt mixture can be effectively improved, the asphalt mixture is prevented from being cracked due to freeze thawing at low temperature, and the service life of an asphalt pavement is prolonged.
In a second aspect, the application provides a preparation method of asphalt mixture for urban roads, which adopts the following technical scheme:
the preparation method of the asphalt mixture for the urban road comprises the following steps:
the modified steel slag and the filler are insulated for 4 to 5 hours at the temperature of 175 to 180 ℃;
adding a water repellent into asphalt, heating and melting to a flowing state, adding the modified steel slag, the filler and the fiber stabilizer after heat preservation, and uniformly stirring to obtain the asphalt mixture for urban roads.
In summary, the application has the following beneficial effects:
1. because the steel slag is used as aggregate to prepare the water-permeable asphalt mixture, the water-permeable asphalt mixture is used for urban roads, so that the running comfort of vehicles can be improved, and the heat island effect of cities can be relieved; the method can also provide a new breakthrough point for recycling the steel slag, solves the technical problem of environmental pollution caused by piling up the steel slag in the steel industry in China to a certain extent, and opens up a wide prospect for converting the steel slag from solid waste into high-quality asphalt concrete wear-resistant aggregate resources.
2. The application preferably uses waste rubber powder, waste plastic, phase-change heat storage particles and the like to prepare the reinforcing modifier, solves the treatment problem of a large number of waste tires and waste plastic facing China, reduces environmental pollution, ensures that the matrix asphalt has the characteristics of heat preservation, heat insulation and pavement heat absorption capacity reduction, reduces pavement heat stability diseases, relieves urban heat island effect, and forms a three-win situation of environmental protection, waste utilization and road life extension.
Detailed Description
Preparation examples 1 to 8 of modified Steel slag
Preparation example 1: 3.2kg of steel slag and 1.7kg of diatomite are ground, 8kg of clay is dried and ground into powder, the powder is uniformly mixed with the ground steel slag and diatomite, 1kg of silicon carbide, 3kg of fly ash, 0.5kg of manganese dioxide, 0.8kg of calcium stearate and 15kg of water are added, the mixture is uniformly mixed and granulated, and the mixture is dried at 60 ℃ for 24 hours to prepare a raw ball, the clay is a concrete clay, the chemical compositions of the concrete clay, the steel slag, the fly ash and the diatomite are shown in table 1, the concrete clay has high ferric oxide content, and when the raw ball is calcined, the concrete clay can convert the ferric oxide and release oxygen, so that the concrete ball plays a vital role in forming pores in the modified steel slag;
preheating the green pellets at 400 ℃ for 30min, heating to 1000 ℃, and sintering for 20min to obtain the modified steel slag.
TABLE 1 analysis of the chemical composition of the Zibo clay, slag, fly ash and diatomaceous earth
Preparation example 2: 3kg of steel slag and 1.5kg of diatomite are ground, 5kg of clay is dried and ground into powder, the powder is uniformly mixed with the ground steel slag and diatomite, 0.6kg of silicon carbide, 2kg of fly ash, 0.3kg of manganese dioxide, 0.5kg of calcium stearate and 10kg of water are added, the mixture is uniformly mixed and granulated, and the mixture is dried at 60 ℃ for 10 hours to prepare raw balls, wherein the clay is the stabo clay, and the chemical compositions of the stabo clay, the steel slag, the fly ash and the diatomite are shown in table 1;
preheating the green pellets at 450 ℃ for 20min, heating to 1100 ℃, and sintering for 10min to obtain the modified steel slag.
Preparation example 3: the difference from preparation 1 is that no catalpol clay is added.
Preparation example 4: the difference from preparation example 1 is that no diatomaceous earth was added.
Preparation example 5: the difference from preparation example 1 is that silicon carbide was not added.
Preparation example 6: the difference from preparation example 1 is that silicon carbide is subjected to the following pretreatment: putting 20kg of silicon carbide into 0.3kg of sodium carboxymethyl cellulose aqueous solution with the concentration of 2wt%, uniformly stirring, adding 5kg of bonding reinforcing agent, uniformly mixing, performing compression molding, crushing, wherein the bonding reinforcing agent is prepared by mixing 0.75kg of acidified carbon nano tube, 2.45kg of silicon dioxide and 1.8kg of aluminum oxide, mixing 1g of carbon nano tube with 200ml of mixed acid, performing ultrasonic treatment for 10 hours, performing suction filtration, washing to pH=7, and drying, wherein the mixed acid is prepared by concentrated sulfuric acid and concentrated nitric acid according to the volume ratio of 3:1.
Preparation example 7: the difference from preparation example 1 is that silicon carbide is subjected to the following pretreatment: 10kg of silicon carbide is put into 0.1kg of sodium carboxymethyl cellulose aqueous solution with the concentration of 2.5wt%, after being stirred uniformly, 4kg of bonding reinforcing agent is added, after being mixed uniformly, the mixture is pressed and molded and crushed, the bonding reinforcing agent is prepared by mixing 0.7kg of acidified carbon nano tube, 1.8kg of silicon dioxide and 1.5kg of aluminum oxide, the acidified carbon nano tube is prepared by mixing 1g of carbon nano tube with 200ml of mixed acid, and after ultrasonic treatment for 10 hours, suction filtration, washing to pH=7 and drying, and the mixed acid is prepared by concentrated sulfuric acid and concentrated nitric acid according to the volume ratio of 3:1.
Preparation example 8: the difference from preparation example 6 is that the acidified carbon nanotubes were not added.
Preparation examples 9 to 15 of Strength modifier
Preparation example 9: (1) 3kg of hollow glass beads are immersed in an aqueous solution of a silane coupling agent KH570 with the concentration of 2wt percent, dried, mixed with 6kg of waste rubber powder, extruded and granulated at the temperature of 190 ℃, and the waste rubber powder is prepared by crushing waste tires, and the particle size is 10mm;
(2) Uniformly mixing 2kg of phase-change heat storage particles, 0.3kg of terpene resin and 5kg of water, uniformly spraying the mixture on the waste rubber particles, heating to 110 ℃, stirring, and cooling to room temperature to obtain pretreated waste rubber particles, wherein the terpene resin is Sylvagum TR105, the softening point is 102-108 ℃, the particle size of the phase-change heat storage particles is 3mm, the wall material is expanded graphite, and the phase-change material is polyethylene glycol 800, and the preparation method comprises the following steps: melting polyethylene glycol 800 in water bath at 60 ℃, uniformly mixing with expanded graphite, and adsorbing for 12 hours at 75 ℃ and-0.1 MPa, wherein the mass ratio of the polyethylene glycol 800 to the expanded graphite is 6:1;
(3) 15kg of waste plastic is mixed with the pretreated waste rubber particles, 1kg of sodium bicarbonate, 1.5kg of 2-hydroxyethyl acrylate and 0.1kg of azodiisobutyronitrile, and the mixture is extruded and granulated at 150 ℃ to prepare the strength modifier.
Preparation example 10: (1) 1kg of hollow glass beads are immersed in an aqueous solution of a silane coupling agent KH570 with the concentration of 2wt percent, dried, mixed with 3kg of waste rubber powder, extruded and granulated at the temperature of 190 ℃, and the waste rubber powder is prepared by crushing waste tires, and the particle size is 10mm;
(2) Uniformly mixing 1kg of phase-change heat storage particles, 0.1kg of terpene resin and 3kg of water, uniformly spraying the mixture on the waste rubber particles, heating to 105 ℃, stirring, and cooling to room temperature to obtain pretreated waste rubber particles, wherein the terpene resin is Sylvagum TR105, the softening point is 102-108 ℃, the particle size of the phase-change heat storage particles is 3mm, the wall material is expanded graphite, and the phase-change material is polyethylene glycol 800, and the preparation method comprises the following steps: melting polyethylene glycol 800 in water bath at 60 ℃, uniformly mixing with expanded graphite, and adsorbing for 12 hours at 75 ℃ and-0.1 MPa, wherein the mass ratio of the polyethylene glycol 800 to the expanded graphite is 6:1;
(3) 10kg of waste plastic is mixed with the pretreated waste rubber particles, 0.5kg of sodium bicarbonate, 1kg of acrylic acid-2-hydroxyethyl ester and 0.06kg of azodiisobutyronitrile, and the mixture is extruded and granulated at 150 ℃ to prepare the strength modifier.
Preparation example 11: the difference from preparation example 9 is that sodium bicarbonate was not added.
Preparation example 12: the difference from preparation example 9 is that 2kg of phase-change heat storage particles, 0.3kg of terpene resin and 5kg of water were uniformly mixed without adding hollow glass beads, and uniformly sprayed on 6kg of waste rubber powder, the particle size of which was 10mm, and the rest was the same as preparation example 1.
Preparation example 13: preparation example 9 differs in that no phase change heat storage particles were added.
Preparation example 14: the difference from preparation example 9 is that the waste plastics were not co-extruded with the pre-treated particles, sodium bicarbonate and 2-hydroxyethyl acrylate to pre-treat the waste rubber particles as reinforcing modifiers.
Preparation example 15: is prepared from 6kg of waste rubber powder and 15kg of waste plastic through mixing, extruding and granulating at 150 ℃.
Examples
Example 1: an asphalt mixture for urban roads, which comprises the following raw materials in parts by weight: 8kg of asphalt, 8kg of filler, 100kg of modified steel slag, 0.4kg of fiber stabilizer and 0.8kg of water repellent, wherein the asphalt is 70# asphalt, the filler comprises mineral powder and slaked lime in a mass ratio of 5:1, the modified steel slag is prepared from preparation example 1, the particle size of the modified steel slag is 10mm, the fiber stabilizer is polyester fiber, and the length of the polyester fiber is6mm, relative density of 1.3g/cm 3 The water repellent is polysiloxane.
The preparation method of the asphalt mixture for the urban road comprises the following steps:
s1, preserving heat of modified steel slag and filler for 5 hours at 180 ℃, and heating and melting asphalt to a flowing state;
s2, mixing the modified steel slag and the filler which are subjected to heat preservation with a fiber stabilizer, uniformly stirring, adding asphalt, and uniformly stirring to obtain the asphalt mixture for urban roads.
Example 2: an asphalt mixture for urban roads, which comprises the following raw materials in parts by weight: asphalt 5kg, filler 4kg, modified steel slag 92kg, fiber stabilizer 0.2kg and water repellent 0.5kg, wherein the asphalt is 70# asphalt, the filler comprises mineral powder and slaked lime in a mass ratio of 6:1, the modified steel slag is prepared from preparation example 2, the particle size of the modified steel slag is 10mm, the fiber stabilizer is polyester fiber, the length of the polyester fiber is 6mm, and the relative density is 1.3g/cm 3 The water repellent is polysiloxane.
The preparation method of the asphalt mixture for the urban road comprises the following steps:
s1, preserving heat of modified steel slag and filler for 4 hours at 175 ℃ and heating and melting asphalt to a flowing state;
s2, mixing the modified steel slag and the filler which are subjected to heat preservation with a fiber stabilizer, uniformly stirring, adding asphalt, and uniformly stirring to obtain the asphalt mixture for urban roads.
Example 3: the asphalt mixture for urban roads is different from the asphalt mixture for example 1 in that the modified steel slag consists of four kinds of graded modified steel slag with the grain diameter of 1-2.36mm, modified steel slag fine aggregate A with the grain diameter of 2.36-4.75 mm, modified steel slag coarse aggregate A with the grain diameter of 4.75-9.5 mm and modified steel slag coarse aggregate B with the grain diameter of 9.5-16 mm; the mass ratio of the modified steel slag fine aggregate A to the modified steel slag fine aggregate B to the modified steel slag coarse aggregate A to the modified steel slag coarse aggregate B is 1.4:0.5:4.4:5.
Example 4: an asphalt mixture for urban roads is different from example 3 in that modified steel slag is produced from production example 6.
Example 5: an asphalt mixture for urban roads is different from example 3 in that modified steel slag is produced from production example 7.
Example 6: an asphalt mixture for urban roads is different from example 3 in that modified steel slag is produced from production example 8.
Example 7: an asphalt mixture for urban road was different from example 4 in that 40kg of strength modifier was added after adding asphalt in step S2, and the strength modifier was prepared in preparation example 9.
Example 8: an asphalt mixture for urban road was different from example 4 in that 30kg of strength modifier was added after adding asphalt in step S2, and the strength modifier was prepared in preparation example 10.
Example 9: an asphalt mixture for urban road, which is different from example 7 in that the strength modifier was prepared in preparation example 11.
Example 10: an asphalt mixture for urban road, which is different from example 7 in that the strength modifier is prepared from preparation example 12.
Example 11: an asphalt mixture for urban road, which is different from example 7 in that the strength modifier is prepared in preparation example 13.
Example 12: an asphalt mixture for urban road, which is different from example 7 in that the strength modifier was prepared in preparation example 14.
Example 13: an asphalt mixture for urban road, which is different from example 7 in that the strength modifier was prepared in preparation example 15.
Comparative example
Comparative example 1: an asphalt mixture for urban roads is different from example 1 in that modified steel slag is produced from production example 3.
Comparative example 2: an asphalt mixture for urban roads is different from example 1 in that modified steel slag is produced from production example 4.
Comparative example 3: an asphalt mixture for urban roads is different from example 1 in that modified steel slag is produced from production example 5.
Comparative example 4: an asphalt mixture for urban roads is different from example 1 in that an equivalent amount of steel slag is used instead of unmodified steel slag.
Comparative example 5: a steel slag permeable asphalt mixture is prepared by the following steps:
(1) Preparing coarse aggregate of steel slag particles with three grading specifications of 19-13.2mm, 13.2-9.5mm and 9.5-4.75mm and fine aggregate of limestone particles with the size of 4.75-0mm for standby;
(2) 15 parts of aggregate with the total weight of 19-13.2mm, 27 parts of aggregate with the total weight of 13.2-9.5mm, 44 parts of aggregate with the total weight of 9.5-4.75mm and 11 parts of aggregate with the total weight of 4.75-0mm are sequentially weighed and mixed with 3 parts of limestone mineral powder, and then are dried in a 180 ℃ oven to constant weight, poured into mixing equipment, added with 0.3 part of polyester fiber, uniformly mixed for 90s, then added with 5 parts of SBS modified asphalt, and uniformly mixed for 90s to obtain the modified asphalt.
The steel slag is prepared by aging converter slag of Wuhan iron and steel company under natural conditions for three years, and the apparent relative density is 3.400g/cm < 3 >; the content of free calcium oxide is 1.0%; soaking in hot water at 60 ℃ for 120 hours with volume expansion rate not more than 2%; the apparent relative density of the limestone particles is 2.600g/cm3; the particle size distribution of the limestone mineral powder is as follows: the 0.6mm passing rate is 100%, the 0.15mm passing rate is 95%, and the 0.075mm passing rate is 100%; the average length of the polyester fiber is 6mm, and the relative density is 1.320g/cm < 3 >; the SBS modified asphalt is obtained by heating 70# road petroleum asphalt to 160 ℃, adding 3 parts by weight of SBS modifier into the asphalt according to the amount of the SBS modifier required by each 100 parts by weight of asphalt, stirring for 30min, and shearing for 2h at a rotating speed of 19200 r/min by using a high-speed shearing instrument.
Performance test
Asphalt mixtures were prepared according to the methods in examples and comparative examples, and properties of the asphalt mixtures were measured with reference to the following methods, and the measurement results are recorded in table 2.
1. Void fraction: detecting according to T0706-2000 'density test of compacted asphalt mixture (weight in water)';
2. freeze thawing cleavage strength ratio: the detection is carried out according to JTJ 052-2000 Highway engineering asphalt and asphalt mixture test procedure; 3. stability degree: the detection is carried out by referring to T0709-2011 'asphalt mixture stability test'.
Table 2 performance testing of asphalt mixtures
| Test item | Void fraction/% | Freeze thawing split strength ratio/% | stability/KN |
| Example 1 | 20.2 | 78.4 | 13.1 |
| Example 2 | 20.0 | 78.1 | 12.8 |
| Example 3 | 19.6 | 81.5 | 13.6 |
| Example 4 | 19.8 | 82.3 | 14.2 |
| Example 5 | 19.7 | 82.1 | 14.0 |
| Example 6 | 19.7 | 81.6 | 13.7 |
| Example 7 | 22.1 | 83.5 | 17.6 |
| Example 8 | 22.3 | 83.3 | 17.2 |
| Example 9 | 19.4 | 84.2 | 17.8 |
| Example 10 | 22.3 | 83.2 | 16.5 |
| Example 11 | 22.4 | 83.3 | 17.4 |
| Example 12 | 19.3 | 84.4 | 17.2 |
| Example 13 | 19.8 | 84.3 | 17.4 |
| Comparative example 1 | 20.1 | 78.3 | 11.2 |
| Comparative example 2 | 20.2 | 78.4 | 11.5 |
| Comparative example 3 | 18.8 | 76.2 | 10.4 |
| Comparative example 4 | 17.5 | 77.6 | 10.0 |
| Comparative example 5 | 20.4 | 76.4 | 16.4 |
The modified steel slag prepared in preparation example 1 and preparation example 2 are respectively used in example 1 and example 2, and table 2 shows that the asphalt mixture prepared in example 1 and example 2 has high void ratio, meets the requirements of JTJ032-94 technical Specification for Highway asphalt pavement in China, has high stability and freeze thawing cleavage strength ratio, and has better high-low temperature property and rutting resistance.
Compared with the example 1, the particle size of the modified steel slag is graded, and the table 1 shows that the void ratio of the asphalt mixture prepared in the example 3 is reduced, but the requirements of JTJ032-94 technical Specification for Highway asphalt pavement in China can still be met, the freeze-thawing splitting strength ratio and the stability of the asphalt mixture are improved, and the rutting resistance is improved.
The modified steel slag prepared in example 4 and example 5 was compared with example 3, and the data in table 2 shows that the asphalt mixtures prepared in example 4 and example 5 had increased void ratio, increased freeze-thaw splitting strength ratio, increased stability, and high water permeability and rutting resistance of asphalt concrete.
In example 6, the modified steel slag prepared in preparation example 8 was used, and in preparation example 8, compared with preparation example 6, the void ratio of asphalt concrete was not changed much without adding acidified carbon nanotubes, but the freeze-thawing cleavage strength ratio was reduced, and the stability was reduced, which means that the influence of carbon nanotubes on the density of asphalt mixture was small, but the freezing resistance and rutting resistance of asphalt concrete could be improved.
In examples 7 and 8, not only the graded steel slag but also the strength modifier prepared in preparation examples 9 and 10 was added, and the impact of the strength modifier on the void ratio of the asphalt mixture was large, and the freeze-thawing resistance and rutting resistance of the asphalt mixture was remarkably improved, and the overall strength and durability of the asphalt mixture were improved, as compared with example 4.
Example 9 the asphalt mixture prepared in example 9 had a reduced porosity but increased freeze-thaw cleavage strength and stability using the strength modifier prepared in preparation 11 without the addition of the porogen sodium bicarbonate in preparation 11 as compared to example 7.
In example 10, compared with example 7, the strength modifier prepared without adding hollow glass beads was used, and the stability of the asphalt mixture was lowered and the rutting resistance was lowered.
In example 11, the strength modifier of preparation example 12 was used without phase change heat storage particles, and the asphalt mixture of example 11 had little change in properties.
In example 12, the strength modifier prepared in preparation example 13 was used, and in preparation example 13, the pretreated rubber particles were not coated with waste plastics, the porosity of the asphalt mixture was reduced, the water permeability was lowered, and the stability was lowered.
In example 13, the strength modifier prepared in preparation example 14 was lower in void ratio and higher in freeze-thawing resistance but lower in stability than in example 7.
The modified steel slag prepared in preparation example 3 and preparation example 4 were used in comparative example 1 and comparative example 2, respectively, and the data in table 2 show that the void ratio of the asphalt mixtures prepared in comparative example 1 and comparative example 2 was not greatly changed, but the stability was lowered and the rut resistance was significantly reduced.
In comparative example 3, the modified steel slag produced in production example 5 was used, in which silicon carbide was not added, but the asphalt mixture had a reduced void fraction, a reduced water permeability and a reduced stability, although the freeze-thaw splitting strength ratio was enhanced as compared with example 1.
Comparative example 4 using unmodified steel slag instead of modified steel slag, the data in table 2 shows that the asphalt mixture prepared in comparative example 4 has reduced void fraction, reduced stability and reduced freezing resistance.
Comparative example 5 is a steel slag water-permeable asphalt material prepared in the prior art, which has higher void ratio but reduced freeze-thawing resistance.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (8)
1. The asphalt mixture for the urban road is characterized by comprising the following components in parts by weight: 5-8 parts of asphalt, 4-8 parts of filler, 92-100 parts of modified steel slag, 0.2-0.4 part of fiber stabilizer, 0.5-0.8 part of water repellent and 30-40 parts of strength modifier by weight;
the modified steel slag comprises the following raw materials in parts by weight: 3-3.2 parts of steel slag, 0.6-1 part of silicon carbide, 2-3 parts of fly ash, 1.5-1.7 parts of diatomite, 5-8 parts of clay, 0.5-0.8 part of calcium stearate, 0.3-0.5 part of manganese dioxide and 10-15 parts of water;
the preparation method of the modified steel slag comprises the following steps:
grinding steel slag and diatomite, drying clay, grinding the clay into powder, uniformly mixing the powder with the ground steel slag and diatomite, adding silicon carbide, fly ash, manganese dioxide, calcium stearate and water, uniformly mixing, granulating, and drying for 10-24 hours to obtain green balls;
preheating the green pellets for 20-30min at 400-450 ℃, heating to 1000-1100 ℃, and sintering for 10-20min to obtain modified steel slag;
the strength modifier is prepared by the following method:
1-3 parts of hollow glass beads are treated by a silane coupling agent KH570, and then mixed with 3-6 parts of waste rubber powder for extrusion and granulation;
uniformly mixing 1-2 parts of phase-change heat storage particles, 0.1-0.3 part of terpene resin and 3-5 parts of water, uniformly spraying on the waste rubber particles, heating to 105-110 ℃, stirring, and cooling to room temperature to obtain pretreated waste rubber particles;
10-15 parts of waste plastic, 0.5-1 part of sodium bicarbonate and 1-1.5 parts of acrylic acid-2-hydroxyethyl ester are mixed together and extruded for granulation to prepare the strength modifier.
2. The asphalt mixture for urban roads according to claim 1, characterized in that the silicon carbide is subjected to the following pretreatment:
10-20 parts of silicon carbide is put into 0.1-0.2 part of sodium carboxymethyl cellulose aqueous solution with the concentration of 2-2.5wt percent, after being uniformly stirred, 4-5 parts of adhesion enhancer is added, after being uniformly mixed, the mixture is pressed, molded and crushed.
3. The asphalt mixture for urban roads according to claim 2, wherein the adhesion enhancer is prepared by mixing 0.7 to 0.75 parts by weight of acidified carbon nanotubes, 1.8 to 2.45 parts by weight of silica, and 1.5 to 1.8 parts by weight of alumina.
4. The asphalt mixture for urban roads according to claim 1, wherein the particle size of the phase-change heat storage particles is 1-3mm, expanded graphite is used as a wall material, and polyethylene glycol 800 is used as a phase-change material.
5. The asphalt mixture for urban roads according to claim 1, characterized in that the modified steel slag consists of the following grading specifications: modified steel slag fine aggregate A with the grain size of 1-2.36mm, modified steel slag fine aggregate B with the grain size of 2.36-4.75 mm, modified steel slag coarse aggregate A with the grain size of 4.75-9.5 mm and modified steel slag coarse aggregate B with the grain size of 9.5-16 mm;
the mass ratio of the modified steel slag fine aggregate A to the modified steel slag fine aggregate B to the modified steel slag coarse aggregate A to the modified steel slag coarse aggregate B is 1-1.4:0.01-0.5:3.6-4.4:3.8-5.
6. The asphalt mixture for urban roads according to claim 1, wherein the filler comprises mineral powder and slaked lime in a mass ratio of 5-6:1.
7. The asphalt mixture for urban roads according to claim 1, wherein the fiber stabilizer is one or a combination of several of polyester fiber, basalt fiber and lignin fiber.
8. The method for preparing an asphalt mixture for a urban road according to any one of claims 1 to 7, comprising the steps of:
the modified steel slag and the filler are insulated for 4 to 5 hours at the temperature of 175 to 180 ℃;
adding a water repellent into asphalt, heating and melting to a flowing state, adding the modified steel slag, the filler and the fiber stabilizer after heat preservation, and uniformly stirring to obtain the asphalt mixture for urban roads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527472.3A CN115849769B (en) | 2022-12-01 | 2022-12-01 | Asphalt mixture for urban road and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527472.3A CN115849769B (en) | 2022-12-01 | 2022-12-01 | Asphalt mixture for urban road and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115849769A CN115849769A (en) | 2023-03-28 |
| CN115849769B true CN115849769B (en) | 2023-12-08 |
Family
ID=85668726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211527472.3A Active CN115849769B (en) | 2022-12-01 | 2022-12-01 | Asphalt mixture for urban road and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115849769B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116640457B (en) * | 2023-06-30 | 2024-05-14 | 中建友（唐山）科技有限公司 | Modified asphalt for waterproof coiled material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603231A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Manufacturing of anti-ice and snow asphalt mixture and construction method thereof |
| CN102731002A (en) * | 2012-07-12 | 2012-10-17 | 湖南中大建设工程检测技术有限公司 | Mineral powder for bituminous mixture and production method thereof |
| CN107188459A (en) * | 2017-04-25 | 2017-09-22 | 华北水利水电大学 | A kind of deicing, antiskid, the preparation method of noise-reduction asphalt road surface material |
| CN109231894A (en) * | 2018-10-20 | 2019-01-18 | 四川志德公路工程有限责任公司 | A kind of road asphalt mixture and preparation method thereof |
| CN110759738A (en) * | 2018-07-27 | 2020-02-07 | 广东清大同科环保技术有限公司 | Steel slag ceramsite and preparation method thereof |
| CN110981536A (en) * | 2019-12-26 | 2020-04-10 | 西安建筑科技大学 | Method and system for preparing steel slag ceramsite |
-
2022
- 2022-12-01 CN CN202211527472.3A patent/CN115849769B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603231A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Manufacturing of anti-ice and snow asphalt mixture and construction method thereof |
| CN102731002A (en) * | 2012-07-12 | 2012-10-17 | 湖南中大建设工程检测技术有限公司 | Mineral powder for bituminous mixture and production method thereof |
| CN107188459A (en) * | 2017-04-25 | 2017-09-22 | 华北水利水电大学 | A kind of deicing, antiskid, the preparation method of noise-reduction asphalt road surface material |
| CN110759738A (en) * | 2018-07-27 | 2020-02-07 | 广东清大同科环保技术有限公司 | Steel slag ceramsite and preparation method thereof |
| CN109231894A (en) * | 2018-10-20 | 2019-01-18 | 四川志德公路工程有限责任公司 | A kind of road asphalt mixture and preparation method thereof |
| CN110981536A (en) * | 2019-12-26 | 2020-04-10 | 西安建筑科技大学 | Method and system for preparing steel slag ceramsite |
Non-Patent Citations (1)
| Title |
|---|
| 高强钢渣陶粒特性试验研究;向晓东等;矿产综合利用(第1期);96-100 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115849769A (en) | 2023-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106045416B (en) | A kind of green high-strength water-permeable brick | |
| CN109160781B (en) | High-strength water-permeable concrete and preparation method thereof | |
| CN107365164B (en) | Fine powder waste residue water-permeable sintered pavement brick and preparation method thereof | |
| CN108218319B (en) | Steel fiber polystyrene particle regenerated thermal insulation concrete and preparation method thereof | |
| CN105622016B (en) | A kind of composite soil stabilizer | |
| CN108164224B (en) | Preparation method of environment-friendly pervious concrete for highway engineering | |
| CN107619297B (en) | Preparation method of tailing ceramsite light permeable brick | |
| CN104193284B (en) | A kind of storage-type industrial residue regeneration square brick and preparation method thereof | |
| CN109265087B (en) | Road recycled aggregate pervious concrete and preparation method thereof | |
| CN115849769B (en) | Asphalt mixture for urban road and preparation method thereof | |
| CN111908862A (en) | Renewable environment-friendly pervious concrete and preparation method thereof | |
| CN112456891A (en) | Pervious concrete material prepared from waste baked bricks and application thereof | |
| CN108409225A (en) | A kind of high intensity high water-permeability pavior brick and preparation method thereof | |
| CN109809747A (en) | Pervious concrete and its preparation process | |
| CN111233381B (en) | Preparation method and application of modified rubber particles, frost-resistant water-permeable concrete and application thereof, frost-resistant water-permeable brick and preparation method thereof | |
| CN107986742B (en) | Water-permeable and water-retaining material and preparation method thereof | |
| CN112125700B (en) | Water purification type pervious concrete capable of removing nitrogen and phosphorus and preparation method thereof | |
| CN109020346B (en) | Highway high-toughness recycled aggregate pervious concrete and preparation method thereof | |
| CN112456918A (en) | Silt curing material and silt curing method | |
| CN117142806B (en) | Water-retaining cooling grouting material for pavement, and preparation method and application thereof | |
| CN111635180B (en) | Environment-friendly pavement concrete and preparation method thereof | |
| CN117776632B (en) | Pavement material based on mine solid waste and preparation method thereof | |
| CN114988841B (en) | Water permeable brick containing construction waste and preparation method thereof | |
| CN116854393B (en) | Carbonized steel slag broken stone stabilized by carbonized vulcanized steel slag-based cementing material and application | |
| CN114195464B (en) | Inorganic material-organic polymer composite permeable cement concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |