CN116623491B - Highway maintenance macadam seal layer and production process thereof - Google Patents
Highway maintenance macadam seal layer and production process thereof Download PDFInfo
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- CN116623491B CN116623491B CN202310867413.9A CN202310867413A CN116623491B CN 116623491 B CN116623491 B CN 116623491B CN 202310867413 A CN202310867413 A CN 202310867413A CN 116623491 B CN116623491 B CN 116623491B
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- 238000012423 maintenance Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000010426 asphalt Substances 0.000 claims abstract description 112
- 238000003892 spreading Methods 0.000 claims abstract description 91
- 239000010802 sludge Substances 0.000 claims abstract description 40
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 34
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000126 substance Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000002480 mineral oil Substances 0.000 claims abstract description 15
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000004058 oil shale Substances 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 239000010865 sewage Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 241000209094 Oryza Species 0.000 claims description 14
- 235000007164 Oryza sativa Nutrition 0.000 claims description 14
- 235000009566 rice Nutrition 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 11
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 9
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 7
- 239000008103 glucose Substances 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 7
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000000197 pyrolysis Methods 0.000 claims description 6
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000701 coagulant Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 27
- 230000002035 prolonged effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000003763 carbonization Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 93
- 238000002360 preparation method Methods 0.000 description 31
- 230000000052 comparative effect Effects 0.000 description 17
- 239000004575 stone Substances 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 7
- 230000003111 delayed effect Effects 0.000 description 6
- 150000002989 phenols Chemical class 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 5
- 229940083575 sodium dodecyl sulfate Drugs 0.000 description 5
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 5
- 230000006750 UV protection Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- 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
-
- 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
- E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4806—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing
- E01C19/4813—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing the materials being simultaneously but separately applied binders and granular or pulverulent material
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/24—Binder incorporated as an emulsion or solution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The application relates to the technical field of highway construction, and particularly discloses a highway maintenance macadam seal layer and a production process thereof. The stone-breaking seal layer is obtained by rolling a composite spreading layer, the composite spreading layer sequentially comprises a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a stone-breaking spreading layer from bottom to top, the second asphalt spreading layer is formed by spreading modified asphalt, the components of the modified asphalt comprise 100-120 parts of matrix asphalt and 16.4-18.2 parts of modified oil sludge, and the modified oil sludge is obtained by centrifugally separating and drying a mixture of oil shale carbonization sewage and montmorillonite; the mass fraction of mineral oil in the modified sludge is 7.8-10.2%, and the mass fraction of phenolic substances is 4.6-5.8%. According to the application, the effect of ultraviolet aging resistance of the second asphalt spreading layer is improved by modifying mineral oil and phenolic substances in the oil sludge, and the service life of the highway maintenance macadam seal layer is prolonged.
Description
Technical Field
The application relates to the technical field of highway construction, in particular to a highway maintenance macadam seal layer and a production process thereof.
Background
The fiber asphalt macadam seal layer refers to a novel road construction and maintenance technology which adopts fiber asphalt macadam seal layer core equipment to spray (scatter) asphalt binder and fiber at the same time, then spreads macadam on the fiber asphalt macadam seal layer core equipment, and forms a new surface layer after rolling. The fiber asphalt macadam seal layer is particularly suitable for protecting old asphalt pavement (or newly built roadbed), and plays an effective role in protecting asphalt pavement construction and maintenance.
In the related art, a highway maintenance macadam sealing layer is obtained by rolling a composite spreading layer, and the composite spreading layer sequentially comprises a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top, wherein the first asphalt spreading layer and the second asphalt spreading layer are formed by spreading matrix asphalt.
In view of the above-mentioned related art, the inventors believe that in the highway maintenance macadam seal layer in the related art, the material at the surface is macadam and asphalt from the second asphalt distribution layer. The second asphalt spreading layer is easy to age after being subjected to long-term ultraviolet rays, so that the components of asphalt are changed, and the macadam sealing layer is not beneficial to fully playing the protection role of the old pavement below. Although the ultraviolet aging of the asphalt can be reduced by adding the ultraviolet inhibitor into the asphalt of the crushed stone seal layer, the construction cost of the crushed stone seal layer can be increased, and the popularization of the crushed stone seal layer is not facilitated.
Disclosure of Invention
In the related art, asphalt is easy to age after being subjected to long-term ultraviolet rays, so that the components of the asphalt are changed, and the crushed stone sealing layer is not beneficial to fully playing the protection role of the old pavement below. In order to overcome the defect, the application provides a highway maintenance macadam seal layer and a production process thereof.
In a first aspect, the application provides a highway maintenance macadam seal layer, which adopts the following technical scheme:
the highway maintenance macadam sealing layer is obtained by rolling a composite spreading layer, the composite spreading layer sequentially comprises a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top, the second asphalt spreading layer is formed by spreading modified asphalt, the components of the modified asphalt comprise 100-120 parts of matrix asphalt and 16.4-18.2 parts of modified oil sludge, and the modified oil sludge is obtained by centrifugally separating and drying a mixture of oil shale carbonization sewage and montmorillonite; the mass fraction of mineral oil in the modified sludge is 7.8-10.2%, and the mass fraction of phenolic substances is 4.6-5.8%.
By adopting the technical scheme, the application adsorbs organic matters in the oil shale retorting sewage through montmorillonite, so that mineral oil and phenolic matters are adsorbed in the montmorillonite, and then the montmorillonite and sludge in the oil shale retorting sewage are subjected to centrifugal separation and drying together, and finally modified oil sludge containing a certain amount of mineral oil and phenolic matters is obtained. During ultraviolet ageing of asphalt, oxygen generally participates in oxidation reaction, so that aromatic components in the asphalt are converted into colloid, and the colloid is further oxidized into asphaltenes, and finally, the components and properties of the asphalt are changed. After the modified sludge is added into the matrix asphalt, the mineral oil absorbed by the modified sludge produces an oil film around the modified sludge particles, and the oil film increases the difficulty of air penetration into the asphalt and reduces the possibility of oxidative deterioration in the asphalt. Meanwhile, phenolic substances absorbed by the modified sludge have a benzene ring structure, and the aromatic components lost by oxidation in the asphalt can be compensated. The aromatic ring structure in the aromatic component is easy to absorb ultraviolet rays, and the total amount of groups capable of absorbing ultraviolet rays in the second asphalt scattering layer is increased by compensating the aromatic component, so that the ultraviolet ageing of asphalt is delayed, and the service life of a highway maintenance macadam seal layer is prolonged.
According to the application, the oil shale dry distillation sewage is purified by montmorillonite, and the solid waste-modified sludge generated in the purification process is recycled, so that the emission of the solid waste is reduced, the reasonable disposal of the waste is realized, and the construction cost required for realizing the ultraviolet resistance effect is also reduced.
Preferably, the components of the modified asphalt comprise 106-114 parts of matrix asphalt and 16.8-17.6 parts of modified sludge.
By adopting the technical scheme, the raw material proportion of the modified asphalt is optimized, the ultraviolet ageing of the asphalt is delayed, and the service life of the highway maintenance macadam seal layer is prolonged.
Preferably, the modified sludge is prepared according to the following method:
(1) Mixing the oil shale dry distillation sewage, the surfactant and the montmorillonite, and stirring and heating at the speed of 800-1000r/min for 2-3h at the temperature of 70-85 ℃ to obtain a mixed solution;
(2) Adding coagulant into the mixed solution, standing for 1-2h, centrifuging the mixed solution, and drying the precipitate to obtain modified sludge.
By adopting the technical scheme, the application firstly utilizes the surfactant to fully disperse the montmorillonite, and fully enters the interlayer of the montmorillonite by stirring and heating surfactant molecules, thereby improving the absorption effect of the montmorillonite on mineral oil and phenolic substances. After the montmorillonite is absorbed, the mixed liquid is coagulated, centrifugally separated and dried to obtain the modified sludge with mineral oil and phenolic matters stored inside.
Preferably, the surfactant is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate.
By adopting the technical scheme, the sodium dodecyl sulfate and the sodium dodecyl benzene sulfonate can be used as the surfactant for promoting the dispersion of the montmorillonite, and can be inserted between montmorillonite layers to improve the compatibility between the montmorillonite and organic matters. Wherein, the sodium dodecyl benzene sulfonate can introduce benzene rings into the montmorillonite, increases the compatibility between phenolic substances and the montmorillonite, and is beneficial to reducing the volatilization degree of volatile phenol in the phenolic substances. As the volatilization of phenolic substances is reduced, the ultraviolet resistance of the asphalt is enhanced, the ultraviolet aging of the second asphalt spreading layer is slowed down, and the service life of the highway maintenance macadam seal layer is prolonged.
Preferably, the surfactant is used in an amount of 38-64% by weight of montmorillonite.
By adopting the technical scheme, when the dosage of the surfactant is too small, the intercalation of the surfactant is incomplete, so that the compatibility between montmorillonite and organic matters is limited, and the montmorillonite cannot fully absorb mineral oil and phenolic matters. Whereas when the amount of the surfactant exceeds the preferable amount range, the compatibility between montmorillonite and organic matters does not increase significantly. When the dosage of the surfactant is 38-64% of the weight of the montmorillonite, the montmorillonite can fully absorb mineral oil and phenolic substances, is favorable for delaying the ultraviolet ageing of asphalt, and prolongs the service life of highway maintenance macadam seal layers.
Preferably, the modified asphalt further comprises a volatilization inhibitor, wherein the volatilization inhibitor is hydrothermal carbon.
By adopting the technical scheme, after a part of volatile phenolic substances in the modified sludge leave the modified sludge, the hydrothermal carbon dispersed in the asphalt can adsorb the phenolic substances, so that the possibility that the phenolic substances volatilize to the outside is reduced. The adsorption of the hydrothermal carbon not only reduces the adverse effect of volatilization of phenols on ultraviolet resistance, but also reduces the possibility of environmental pollution caused by volatilization of phenols.
Preferably, the hydrothermal carbon is prepared according to the following method:
grinding rice hulls, sieving, drying, mixing the rice hulls with deionized water, adding the mixture into a hydrothermal reaction device, preserving heat for 4-5 hours at 220-230 ℃, alternately cleaning a product by using ethanol and deionized water, and drying to obtain the hydrothermal carbon.
By adopting the technical scheme, the application uses the typical agricultural solid waste rice hulls as a carbon source, and organic matters in the rice hulls are carbonized in the hydrothermal reaction equipment to obtain the hydrothermal carbon.
Preferably, in the method of preparing the hydrothermal char, ferric chloride is co-mixed with rice hulls and deionized water.
By adopting the technical scheme, the ferric chloride can increase the specific surface area and the pore volume of the hydrothermal carbon, is favorable for reducing the loss of phenolic substances caused by volatilization, is favorable for delaying the ultraviolet ageing of asphalt, and prolongs the service life of the highway maintenance macadam seal.
Preferably, in the method of preparing the hydrothermal char, glucose is co-mixed with rice hulls and deionized water.
Through adopting above-mentioned technical scheme, the carbonization of glucose can take place as extra carbon source, and the carbonization of glucose makes hydrothermal charcoal surface contain oxygen functional group increase, and specific surface area increases, is favorable to improving hydrothermal charcoal's adsorption, has reduced phenol substance's loss of volatilizing, has delayed the ultraviolet ageing of pitch, has prolonged highway maintenance rubble seal's life.
In a second aspect, the application provides a production process of a highway maintenance macadam seal layer, which adopts the following technical scheme.
A production process of a highway maintenance macadam seal layer comprises the following steps:
(1) Spreading construction is carried out on the working surface to obtain a composite spreading layer which is formed by sequentially laminating a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top; in the step, the raw material of the first asphalt spreading layer is matrix asphalt, and the raw material of the second asphalt spreading layer is any one of the modified asphalt;
(2) And rolling the composite spreading layer to obtain the highway maintenance macadam seal layer.
By adopting the technical scheme, the process of the application firstly carries out construction on the first asphalt spreading layer, the fiber spreading layer, the second asphalt spreading layer and the macadam spreading layer, and then compacts the spreading layers by rolling to obtain the highway maintenance macadam sealing layer. On the surface of the obtained highway maintenance macadam sealing layer, mineral oil in modified oil sludge can block oxygen from penetrating, and phenolic substances can supplement aromatic components consumed by oxidization, so that the aging of asphalt can be delayed, and the service life of the highway maintenance macadam sealing layer is prolonged.
In summary, the application has the following beneficial effects:
1. according to the application, the modified oil sludge is added into the components of the second asphalt spreading layer, and the mineral oil and phenolic substances in the modified oil sludge improve the ultraviolet aging resistance effect of the second asphalt spreading layer, so that the service life of the highway maintenance macadam sealing layer is prolonged. In addition, the application purifies the oil shale dry distillation sewage through montmorillonite, and regenerates and utilizes the solid waste generated in the purification process, thereby realizing reasonable disposal of the solid waste.
2. The preferred surfactant in the application is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate, which can be used as surfactant for promoting montmorillonite dispersion, and can be inserted between montmorillonite layers to improve the compatibility between montmorillonite and organic matters. After sodium dodecyl benzene sulfonate is inserted between montmorillonite layers, the compatibility between montmorillonite and phenolic substances can be improved, the volatilization of the phenolic substances can be reduced, and the ultraviolet ageing of asphalt can be delayed.
3. The method comprises the steps of constructing a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer, and then compacting the spreading layers by rolling to obtain the road maintenance macadam sealing layer. On the surface of the obtained highway maintenance macadam sealing layer, the ageing of asphalt is delayed due to the addition of modified oil sludge, and the service life of the highway maintenance macadam sealing layer is prolonged.
Detailed Description
The present application will be described in further detail with reference to examples, preparations and comparative examples, and the raw materials according to the present application are all commercially available.
Preparation example of modified sludge
The following is an example of preparation 1.
Preparation example 1
In the preparation example, the concentration of mineral oil in the oil shale retorting sewage is 1860mg/L, the concentration of total phenol is 1352mg/L, and the concentration of volatile phenol is 472mg/L.
In the preparation example, the modified sludge is prepared according to the following method:
(1) 1000L of oil shale dry distillation sewage, 5.4kg of surfactant and 10kg of sodium montmorillonite are mixed, and then stirred and heated at the speed of 950r/min for 3 hours at 80 ℃ to obtain a mixed solution; in the step, the surfactant is sodium dodecyl sulfate;
(2) Adding coagulant ferric chloride into the mixed solution at the dosage of 50mg/L, standing for 2h, centrifuging the mixed solution, and drying the precipitate to obtain the modified sludge containing 8.6% of mineral oil and 4.9% of phenolic substances.
Preparation example 2
The present preparation differs from preparation 1 in that the surfactant is sodium dodecylbenzenesulfonate.
As shown in Table 1, the preparation examples 2 to 6 were different in the amount of the surfactant.
TABLE 1
| Sample of | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 | Preparation example 6 |
| Surfactant/kg | 3.0 | 3.8 | 4.6 | 6.4 | 6.8 |
Preparation example of hydrothermal charcoal the following is exemplified by preparation example 7
Preparation example 7
In this preparation example, the hydrothermal carbon is prepared according to the following method:
grinding rice hulls, sieving with a 60-mesh sieve, drying at 105 ℃, and then mixing the rice hulls with deionized water according to a ratio of 1:10, adding the mixture into hydrothermal reaction equipment, preserving the temperature at 225 ℃ for 5 hours, alternately cleaning the product by using ethanol and deionized water for one time, and drying at 105 ℃ to obtain the hydrothermal carbon.
Preparation example 8
The difference between this preparation example and preparation example 7 is that in the method for preparing hydrothermal charcoal, ferric chloride, rice hulls and deionized water are mixed together, and the weight ratio of ferric chloride to water is 1:20.
Preparation example 9
The difference between this preparation example and preparation example 7 is that in the method for preparing the hydrothermal charcoal, glucose is mixed with rice hulls and deionized water together, and the weight ratio of glucose to water is 1:20.
Examples
Examples 1 to 5
The following description will take example 1 as an example.
Example 1
In this example, the crushed stone size is 4.75-9.5mm, and the crushed stone spreading amount is 13.5kg/m 2 The fiber spreading amount is 100g/m 2 Glass fiber was used as the fiber, and the spreading amount of the base asphalt and the modified asphalt was 1.5kg/m 2 。
In the embodiment, the highway maintenance macadam seal layer is produced according to the following process:
(1) Spreading construction is carried out at the working surface by using a spreading vehicle at the speed of 3km/h, so as to obtain a composite spreading layer which is formed by sequentially laminating a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top; in the step, the raw material of the first asphalt spreading layer is matrix asphalt, the raw material of the second asphalt spreading layer is modified asphalt, and the modified asphalt is formed by mixing 100kg of matrix asphalt and 16.4kg of modified oil sludge in preparation example 1;
(2) And 5 times of rolling is carried out on the composite spreading layer at the speed of 2km/h by using a 30T rubber-tyred roller, so that the highway maintenance macadam seal layer is obtained.
As shown in Table 2, examples 1 to 5 are different in mainly the raw material ratios of the modified asphalt
Table 2 raw material ratio of modified asphalt
| Sample of | Matrix asphalt/kg | Modified sludge/kg |
| Example 1 | 120 | 16.4 |
| Example 2 | 115 | 16.8 |
| Example 3 | 110 | 17.3 |
| Example 4 | 105 | 17.8 |
| Example 5 | 100 | 18.2 |
Examples 6 to 10
Examples 6-10 differ from example 3 in the preparation of modified sludge, as shown in Table 3.
Table 3 preparation examples of modified sludge
Example 11
The difference between this example and example 3 is that the modified asphalt further comprises a volatilization inhibitor, the volatilization inhibitor is the hydrothermal carbon of preparation example 7, and the amount of the hydrothermal carbon is 15% of the weight of the modified sludge.
Example 12
This example differs from example 11 in that the hydrothermal carbon was prepared in accordance with the method of preparation example 8.
Example 13
This example differs from example 12 in that the hydrothermal carbon was prepared in accordance with the method of preparation example 9.
Comparative example
Comparative example 1
In this comparative example, the crushed stone size was 4.75-9.5mm, and the crushed stone spreading amount was 13.5kg/m 2 The fiber spreading amount is 100g/m 2 Glass fiber was used as the fiber, and the matrix asphalt was dispensed in an amount of 1.5kg/m 2 。
The comparative example provides a highway maintenance macadam seal layer, which is produced according to the following process:
(1) Spreading construction is carried out at the working surface by using a spreading vehicle at the speed of 3km/h, so as to obtain a composite spreading layer which is formed by sequentially laminating a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top; in the step, the raw materials of the first asphalt spreading layer and the second asphalt spreading layer are matrix asphalt;
(2) And 5 times of rolling is carried out on the composite spreading layer at the speed of 2km/h by using a 30T rubber-tyred roller, so that the highway maintenance macadam seal layer is obtained.
Comparative example 2
This comparative example differs from example 3 in that the modified sludge was replaced with an equal weight of sodium-based montmorillonite.
Performance detection test method
The elastic moduli of the modified asphalt of examples 1 to 13 and comparative example 2 and the base asphalt of comparative example 1 before and after the ultraviolet light aging test were tested with reference to the "test procedure for highway engineering asphalt and asphalt mixture" (JTG E20-2011), the ratio of the elastic modulus after aging of the asphalt sample to the initial elastic modulus was defined as the aging coefficient, the ratio between the aging coefficient of each example, comparative example and the aging coefficient of comparative example 1 was defined as the relative aging coefficient, and the test results of the initial elastic modulus and the relative aging coefficient are shown in Table 4.
During test, 10 ultraviolet lamp tubes with the effective radiation area of 0.5m are arranged in an ultraviolet box with the thickness of 450 multiplied by 1165 multiplied by 500mm, and the number of ultraviolet lamp tubes is 58w 2 The radiation intensity of each lamp tube is 116W/m 2 The irradiation time was 48 hours, and the temperature during the irradiation was controlled at 25 ℃.
TABLE 4 Table 4
As can be seen from the combination of examples 1 to 5 and comparative example 1 and Table 4, the comparative aging coefficients measured in examples 1 to 5 are smaller than those in comparative example 1, demonstrating that the application improves the aging resistance of asphalt by adding modified sludge, preventing oxygen permeation, and supplementing the aromatic components lost during asphalt aging with phenols.
As can be seen from a combination of example 3 and comparative example 2 and table 4, the comparative aging coefficient measured in example 3 is lower than that in comparative example 2, indicating that the aging resistance of asphalt cannot be sufficiently improved by adding montmorillonite alone.
In combination with examples 3 and examples 6-10 and with Table 4, it can be seen that sodium dodecylbenzenesulfonate is more suitable than sodium dodecylsulfate for improving the ultraviolet aging resistance of asphalt, and that the preferred amount of surfactant is 38-64% by weight of montmorillonite in the case where the surfactant is sodium dodecylbenzenesulfonate.
As can be seen from the combination of examples 3 and examples 11-13 and table 4, the hydrothermal carbon can adsorb the phenols, reduce the possibility of volatilizing the phenols to the outside, and reduce the adverse effect of volatilizing the phenols on the ultraviolet resistance. The ferric chloride and the glucose can improve the adsorption effect of the hydrothermal carbon on the phenolic substances, further reduce the volatilization loss of the phenolic substances, be beneficial to delaying the ultraviolet ageing of asphalt and prolong the service life of the highway maintenance macadam sealing layer.
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 (6)
1. The highway maintenance macadam sealing layer is characterized in that the macadam sealing layer is obtained by rolling a composite spreading layer, the composite spreading layer sequentially comprises a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top, the second asphalt spreading layer is formed by spreading modified asphalt, the components of the modified asphalt comprise 100-120 parts of matrix asphalt and 16.4-18.2 parts of modified oil sludge, and the modified oil sludge is obtained by centrifugally separating and drying a mixture of oil shale dry distillation sewage and montmorillonite; the mass fraction of mineral oil in the modified sludge is 7.8-10.2%, and the mass fraction of phenolic substances is 4.6-5.8%; the components of the modified asphalt also comprise a volatilization inhibitor, wherein the volatilization inhibitor is hydrothermal carbon;
the hydrothermal carbon is prepared according to the following method:
grinding rice hulls, sieving, drying, mixing the rice hulls with deionized water, adding the mixture into hydrothermal reaction equipment, preserving heat for 4-5 hours at 220-230 ℃, alternately cleaning a product by using ethanol and deionized water, and drying to obtain hydrothermal carbon;
the modified sludge is prepared according to the following method:
(1) Mixing the oil shale dry distillation sewage, the surfactant and the montmorillonite, and stirring and heating at the speed of 800-1000r/min for 2-3h at the temperature of 70-85 ℃ to obtain a mixed solution; the surfactant is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate;
(2) Adding coagulant into the mixed solution, standing for 1-2h, centrifuging the mixed solution, and drying the precipitate to obtain modified sludge.
2. A highway maintenance macadam seal according to claim 1 wherein said modified asphalt comprises 106-114 parts base asphalt and 16.8-17.6 parts modified sludge.
3. A highway maintenance macadam seal according to claim 1 wherein said surfactant is present in an amount of 38 to 64% by weight of montmorillonite.
4. A highway maintenance macadam seal according to claim 1 wherein in the process of making said hydro-thermal char ferric chloride is co-mixed with rice hulls and deionized water.
5. A highway maintenance macadam seal according to claim 1 wherein in the process of making said hydro-thermal char glucose is co-mixed with rice hulls and deionized water.
6. The production process of the highway maintenance macadam seal layer is characterized by comprising the following steps of:
(1) Spreading construction is carried out on the working surface to obtain a composite spreading layer which is formed by sequentially laminating a first asphalt spreading layer, a fiber spreading layer, a second asphalt spreading layer and a macadam spreading layer from bottom to top; in the step, the raw material of the first asphalt spreading layer is matrix asphalt, and the raw material of the second asphalt spreading layer is modified asphalt according to any one of claims 1-5;
(2) And rolling the composite spreading layer to obtain the highway maintenance macadam seal layer.
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| CN107828215A (en) * | 2017-10-26 | 2018-03-23 | 青岛科技大学 | A kind of activated stock and its production technology for being used to prepare modified pitch |
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