CN116657481A - Steel slag doped asphalt concrete wearing layer and preparation method thereof - Google Patents

Steel slag doped asphalt concrete wearing layer and preparation method thereof Download PDF

Info

Publication number
CN116657481A
CN116657481A CN202310388288.3A CN202310388288A CN116657481A CN 116657481 A CN116657481 A CN 116657481A CN 202310388288 A CN202310388288 A CN 202310388288A CN 116657481 A CN116657481 A CN 116657481A
Authority
CN
China
Prior art keywords
asphalt concrete
steel slag
wearing layer
modified asphalt
layer
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.)
Pending
Application number
CN202310388288.3A
Other languages
Chinese (zh)
Inventor
彭杰
黄毅
刘正根
何林波
胡安超
杨菁
吕定操
王晖明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Expressway Construction Engineering Co ltd
Hunan Expressway Group Co ltd
Original Assignee
Hunan Expressway Construction Engineering Co ltd
Hunan Expressway Group Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Expressway Construction Engineering Co ltd, Hunan Expressway Group Co ltd filed Critical Hunan Expressway Construction Engineering Co ltd
Priority to CN202310388288.3A priority Critical patent/CN116657481A/en
Publication of CN116657481A publication Critical patent/CN116657481A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • 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
    • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
    • E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
    • E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Road Paving Structures (AREA)

Abstract

The application relates to the technical field of asphalt compositions, in particular to the field of IPCC08L95, and more particularly relates to a steel slag doped asphalt concrete wearing layer and a preparation method thereof. From top to bottom, comprises an ultra-thin steel slag asphalt concrete wearing layer and a modified asphalt concrete bonding layer. The thickness of the super-tough high-strength wearing layer is 1.8-3cm, so that the stability of the wearing layer can be improved and the construction efficiency can be improved; the weight ratio of the coarse aggregate to the fine aggregate is 1: (0.8-1.3), the drainage and noise reduction performance of the wearing layer can be improved; the tensile strength of the epoxy modified asphalt concrete bonding layer is 2MPa, and when the elongation at break is more than 100%, the crack resistance of the wearing layer can be improved; the construction is simple and convenient, the structure of the old pavement is not required to be changed, and the conventional construction equipment can be implemented.

Description

Steel slag doped asphalt concrete wearing layer and preparation method thereof
Technical Field
The application relates to the technical field of asphalt compositions, in particular to the field of IPCC08L95, and more particularly relates to a steel slag doped asphalt concrete wearing layer and a preparation method thereof.
Background
The cement concrete road bridge deck needs to be maintained after long-time use, and the maintenance cost is very high, mainly because the asphalt concrete surface layer is too thick, a large amount of raw materials and operation are needed by milling and paving, so that the construction period is long and the labor cost is high, and in recent years, the maintenance is started by adopting an ultrathin asphalt concrete surface layer in China, and the effects of energy conservation and emission reduction can be achieved while the cost is reduced.
The ultrathin asphalt concrete surface layer can be divided into a wearing layer and an adhesive layer according to the structure, wherein the adhesive layer has the functions of enabling the ultrathin asphalt concrete surface layer and a concrete base layer to be adhered tightly, preventing the repaired surface layer from falling off, and resisting the damage of wheel load and natural factors to the road surface, so that the strength and the stability of the road surface are effectively ensured, the road surface flatness is improved, the driving condition is improved, and the service life is prolonged. In order to ensure the increasing traffic demand and reduce the consumption of secondary maintenance, the wear layer has high requirements on the high temperature resistance, oxidation resistance, water resistance and other resistance performances of the material, the bearing and wear resistance and other mechanical performances, the ultra-thin wear layer at the present stage has the common conditions of excessively fast decay of the functional performance and the like, and the performance of the cementing material needs to be improved and optimized.
CN104496285a discloses a rubber asphalt ultra-thin wearing layer mixture, which comprises the following components: rubber asphalt and mineral mixture; the mass ratio of the rubber asphalt to the mineral mixture is 4.9-5.3:100; the mineral mixture comprises limestone machine-made sand, limestone mineral powder and basalt with the particle size of 8-11 mm. The rubber modified asphalt mixture adopts continuous grading to form a suspension compact mixture, and the asphalt mixture has higher cohesive force, but has lower internal friction resistance, and the cohesive force is easy to be influenced by temperature, so the high-temperature stability of the asphalt mixture is poor.
Disclosure of Invention
The application provides a steel slag doped asphalt concrete wearing layer and a preparation method thereof, wherein the wearing layer has excellent tolerance performance and mechanical property, keeps long-term stability, prolongs the service life of a cement concrete road deck, reduces secondary maintenance consumption, is simple and convenient to construct, does not need to change the structure of an old road surface, can be implemented by conventional construction equipment, and is suitable for paving cement concrete and steel bridge surfaces with large span and large deformation.
In order to achieve the aim of the application, the first aspect of the application provides a steel slag doped asphalt concrete wearing layer, which comprises a steel slag asphalt concrete ultrathin wearing layer and a modified asphalt concrete bonding layer from top to bottom.
The inventor researches and discovers that the thickness of the super-tough high-strength wearing layer is 1.8-3cm, the stability of the wearing layer can be improved, the construction efficiency can be improved, the super-tough high-strength wearing layer is reduced in thickness, the construction amount is reduced, the steel slag asphalt concrete ultra-thin wearing layer, the modified asphalt concrete bonding layer and the asphalt bottom layer have stronger bonding force, cracks can occur due to interlayer peeling force when the super-tough high-strength wearing layer is subjected to strong shearing force due to the smaller thickness, the modified asphalt concrete bonding layer comprises an epoxy modified asphalt concrete bonding layer, the tensile strength of the epoxy modified asphalt concrete bonding layer is 2MPa, and when the elongation at break is greater than 100%, the crack resistance of the wearing layer can be improved, and the super-tough high-strength wearing layer is particularly suitable for paving cement concrete with large span and large deformation.
Preferably, the thickness of the super-tough high-strength wearing layer is 1.8-3cm.
Further preferably, the thickness of the super-tough high-strength wearing layer is 2cm.
Preferably, the modified asphalt concrete bonding layer comprises an epoxy modified asphalt concrete bonding layer, the tensile strength of the epoxy modified asphalt concrete bonding layer is 2MPa, and the elongation at break is more than 100%.
Further preferably, the modified asphalt concrete bonding layer comprises an epoxy modified asphalt concrete bonding layer, the tensile strength of the epoxy modified asphalt concrete bonding layer is 2.5-2.6MPa, and the elongation at break is 125-130%.
Still more preferably, the modified asphalt concrete bonding layer comprises an epoxy modified asphalt concrete bonding layer, the tensile strength of the epoxy modified asphalt concrete bonding layer is 2.6MPa, the elongation at break is 130%, the modified asphalt concrete bonding layer is self-made by the company, and the preparation method of the epoxy modified asphalt concrete bonding layer comprises the following steps: heating 18wt% of resin to 80 ℃, and adding 5wt% of steel slag and 9wt% of toughening agent to obtain 9wt% of curing agent to obtain a mixture; heating 59wt% of asphalt to 160 ℃, adding the asphalt into the mixture, and uniformly mixing to obtain the asphalt.
The ultra-thin wearing layer of the steel slag asphalt concrete comprises, by weight, 5-15 parts of SBS high-viscosity modified asphalt, 40-70 parts of aggregate, 10-30 parts of mineral powder, 5-15 parts of steel slag and 0.03-0.1 part of fiber materials.
Preferably, the SBS high-viscosity modified asphalt comprises SBS modified asphalt and a high-viscosity modifier, wherein the weight ratio of the SBS modified asphalt to the high-viscosity modifier is (8-12): 1.
further preferably, the SBS high viscosity modified asphalt comprises SBS modified asphalt and a high viscosity modifier, wherein the weight ratio of the SBS modified asphalt to the high viscosity modifier is 92:8.
preferably, the SBS modified asphalt is available from Sechen broadasphalt Co.
Preferably, the high viscosity modifier has a density of 0.88-0.92g/cm 3 The grain diameter is 3-6mm, and the water absorption rate is 0.1-1%.
Further preferably, the high adhesion modifier has a density of 0.90g/cm 3 Particle size is 4mm, water absorption is 0.3%, and the product is purchased from Shenzhen Lite New Material science and technology Co., ltd., model: LT-HVA.
The preparation method of the SBS high-viscosity modified asphalt comprises the following steps: heating SBS modified asphalt to about 160-175 ℃, adding a high viscosity modifier, placing under a high-speed shearing machine, adjusting the rotating speed to 5000-8000 r/min, continuously shearing for 20-30min, controlling the temperature in the whole process to 185-195 ℃, and then placing in a 180-190 ℃ oven for development for 15-40min to obtain the modified asphalt.
Preferably, the preparation method of the SBS high-viscosity modified asphalt comprises the following steps: heating SBS modified asphalt to about 165 ℃, adding a high viscosity modifier, placing under a high-speed shearing machine, adjusting the rotating speed to 5000 r/min, continuously shearing for 30min, controlling the temperature in the whole process to be 195 ℃, and then placing into a 180 ℃ oven for development for 30min to obtain the modified asphalt.
The inventors found that the weight ratio of coarse aggregate to fine aggregate was 1: (0.8-1.3), the drainage and noise reduction performance of the wearing layer can be improved, and the porosity between coarse aggregate and fine aggregate with specific proportion can be improved by grading adjustment, so that the water on the pavement can be rapidly discharged from a large amount of pores, the road surface water accumulation and the formation of a water film on the pavement are avoided, and the running slip and splashing of water are reduced.
The aggregate comprises coarse aggregate and fine aggregate, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1: (0.8-1.3).
Preferably, the aggregate comprises coarse aggregate and fine aggregate, and the weight ratio of the coarse aggregate to the fine aggregate is 1:1.
the coarse aggregate and the fine aggregate are obtained by grinding stones, wherein the stones comprise basalt and diabase, and the weight ratio of the basalt to the diabase is 1: (0.5-1.2).
Preferably, the coarse aggregate and the fine aggregate are obtained by grinding stone, wherein the stone comprises basalt and diabase, and the weight ratio of the basalt to the diabase is 1:0.8.
preferably, the nominal particle size of the coarse aggregate comprises two types of 5-10mm and 3-5mm, and the weight ratio of the coarse aggregate of 5-10mm to the coarse aggregate of 3-5mm is 1: (0.5-1).
Further preferably, the nominal particle size of the coarse aggregate comprises two types of 5-10mm and 3-5mm, and the weight ratio of the 5-10mm to the 3-5mm coarse aggregate is 1:0.8.
the nominal grain diameter of the fine aggregate is 0-2.36mm.
Preferably, the part of the fine aggregate with the grain size of more than 0.3mm is not higher than 12wt%, and the part with the grain size of less than 0.075mm is not higher than 10wt%.
It is further preferred that the fine aggregate particle size is 8% by weight in the portion having a particle size of more than 0.3mm and 6% by weight in the portion having a particle size of less than 0.075mm (sieving by water washing).
Preferably, the steel slag is crushed from steel slag raw materials to an average particle size of 4.75-9.5mm, and is aged for 10-16 months for use.
Further preferably, the steel slag is obtained by crushing a steel slag raw material to an average grain size of 6.5mm, aging for 16 months, and then using the steel slag raw material, wherein the steel slag raw material is hot-splashing steel slag of Hubeibao wu iron group.
The mineral powder is obtained by grinding strong basic rock in limestone or magma rock.
Preferably, the mineral powder is obtained by grinding limestone stones, and the particle size of the mineral powder is smaller than 0.6mm.
Further preferably, the mineral powder is obtained by grinding limestone stones, and the average particle size of the mineral powder is smaller than 0.15mm.
Still more preferably, the mineral powder is obtained by grinding limestone stones, and the average particle size of the mineral powder is 0.075mm.
The fiber material comprises at least one of basalt chopped fiber and lignin.
Preferably, the fibrous material comprises basalt chopped fibers having an average length of 6-9mm and an average diameter of 10-20 μm.
Further preferably, the fibrous material comprises basalt chopped fibers having an average length of 6mm and an average diameter of 16 μm, available from taan hong concrete new materials limited.
The preparation of the steel slag asphalt concrete ultrathin wearing layer comprises the following steps:
step 1: sequentially adding aggregate, steel slag and fiber materials, and dry-mixing for 10s-15s to obtain a mixture 1;
step 2: adding SBS high-viscosity modified asphalt into the mixture 1, and stirring for 10-20s to obtain a mixture 2;
step 3: adding mineral powder into the mixture 2, and stirring for 25-40s to obtain the final product.
Preferably, the preparation of the steel slag asphalt concrete ultra-thin wearing layer comprises the following steps:
step 1: sequentially adding aggregate, steel slag and fiber materials, and dry-mixing for 15s to obtain a mixture 1;
step 2: adding SBS high-viscosity modified asphalt into the mixture 1, and stirring for 15s to obtain a mixture 2;
step 3: adding mineral powder into the mixture 2, and stirring for 45s to obtain the final product.
The application provides a preparation method of a steel slag doped asphalt concrete wearing layer, which comprises the following steps:
s1, finish milling is carried out on a road;
s2, sprinkling a modified asphalt concrete bonding layer;
s3, sprinkling an ultra-thin wearing layer of steel slag asphalt concrete, and compacting.
Preferably, the amount of the sprinkling cloth in the step S2 is 0.6-0.9kg/m 2 。
Further preferably, the amount of the sprinkling cloth in the step S2 is 0.8kg/m 2 。
Preferably, the temperature of the sprinkling in the step S2 is 160-170 ℃.
Further preferably, the temperature of the sprinkling in the step S2 is 160 ℃.
Preferably, the amount of the sprinkling cloth in the step S2 is 0.8-1.3kg/m 2 。
Further preferably, the amount of the sprinkling cloth in the step S3 is 0.9kg/m 2 。
Preferably, the temperature of the sprinkling cloth in the step S3 is 165-180 ℃.
Further preferably, the temperature of the sprinkling in the step S3 is 170 ℃.
The compaction sequentially passes through initial compaction, re-compaction and final compaction.
Preferably, the initial pressing adopts rigid static rolling pressure, and the number of initial pressing times is 1-2 times.
Further preferably, the initial pressing adopts a rigid static rolling pressure, and the number of initial pressing passes is 2.
Preferably, the back pressure adopts a vibratory roller, and the number of back pressure passes is 2.
Preferably, the final pressing adopts a rigid rolling pressure, and the number of the final pressing passes is 1.
The beneficial effects are that:
1. the thickness of the super-tough high-strength wearing layer is 1.8-3cm, so that the stability of the wearing layer can be improved, and meanwhile, the construction efficiency can be improved.
2. The weight ratio of the coarse aggregate to the fine aggregate is 1: (0.8-1.3), the drainage and noise reduction performance of the wearing layer can be improved.
3. The tensile strength of the epoxy modified asphalt concrete bonding layer is more than 2MPa, and when the elongation at break is more than 100%, the cracking resistance of the wearing layer can be improved.
4. The construction is simple and convenient, the structure of the old pavement is not required to be changed, and the conventional construction equipment can be implemented.
5. The SBS high-viscosity modified asphalt comprises SBS modified asphalt and a high-viscosity modifier, wherein the weight ratio of the SBS modified asphalt to the high-viscosity modifier is (8-12): 1, the weather resistance of the wearing layer can be improved.
Detailed Description
Example 1
The steel slag doped asphalt concrete wearing layer comprises a steel slag asphalt concrete ultrathin wearing layer and a modified asphalt concrete bonding layer from top to bottom.
The thickness of the super-tough high-strength wearing layer is 2cm.
The modified asphalt concrete bonding layer is an epoxy modified asphalt concrete bonding layer, the tensile strength of the epoxy modified asphalt concrete bonding layer is 2.6MPa, the elongation at break is 130%, the modified asphalt concrete bonding layer is self-made by Hunan high-speed construction engineering Co., ltd., and the preparation method of the epoxy modified asphalt concrete bonding layer comprises the following steps: heating 18wt% of resin to 80 ℃, and adding 5wt% of steel slag and 9wt% of toughening agent to obtain 9wt% of curing agent to obtain a mixture; heating 59wt% of asphalt to 160 ℃, adding the asphalt into the mixture, and uniformly mixing to obtain the asphalt.
The resin comprises epoxy resin, wherein the epoxy resin comprises glycidol amine type epoxy resin and bisphenol F curing epoxy resin, and the weight ratio of the glycidol amine type epoxy resin to the bisphenol F curing epoxy resin is 1:1.2.
the glycidylamine type epoxy resin is purchased from the wuhan Hua Xiangke biotechnology company, brand: hua Xiangke clean, model: MF-4230; bisphenol F cured epoxy resin Shanghai Kaiyin chemical Co., ltd., brand: hounsmei, model: ARALDITE GY 281.
The toughening agent comprises polyethylene glycol diglycidyl ether.
The curing agent comprises anhydride curing agent methyl nadic anhydride (25134-21-8) and methyl hexahydrophthalic anhydride (CAS: 25550-51-0), wherein the weight ratio of the methyl nadic anhydride to the methyl hexahydrophthalic anhydride is 1:3.
the asphalt is 70# road petroleum asphalt produced by Zhongpetrifaction sea-suppression.
The ultra-thin abrasion layer of the steel slag asphalt concrete comprises 7 parts of SBS high-viscosity modified asphalt, 55 parts of aggregate, 20 parts of mineral powder, 10 parts of steel slag and 0.05 part of fiber material according to the weight parts.
The SBS high-viscosity modified asphalt is prepared from SBS modified asphalt and a high-viscosity modifier, wherein the weight ratio of the SBS modified asphalt to the high-viscosity modifier is 92:8.
the SBS modified asphalt is purchased from Sechen Xin broad asphalt sales Co.
The density of the high viscosity modifier is 0.90g/cm 3 The particle size of the high-viscosity modifier is 4mm, the water absorption of the high-viscosity modifier is 0.3%, and the high-viscosity modifier is purchased from Shenzhen Lite New Material technology Co., ltd., model: LT-HVA.
The preparation method of the SBS high-viscosity modified asphalt comprises the following steps: heating SBS modified asphalt to about 165 ℃, adding a high viscosity modifier, placing under a high-speed shearing machine, adjusting the rotating speed to 5000 r/min, continuously shearing for 30min, controlling the temperature in the whole process to be 195 ℃, and then placing into a 180 ℃ oven for development for 30min to obtain the modified asphalt.
The aggregate is coarse aggregate and fine aggregate, and the weight ratio of the coarse aggregate to the fine aggregate is 1:1.
the coarse aggregate and the fine aggregate are obtained by grinding stone, wherein the stone is basalt or diabase, and the weight ratio of the basalt to the diabase is 1:0.8.
the nominal grain diameter of the coarse aggregate is 5-10mm and 3-5mm, and the weight ratio of the coarse aggregate of 5-10mm to the coarse aggregate of 3-5mm is 1:0.8.
the nominal grain diameter of the fine aggregate is 0-2.36mm.
The fine aggregate particle size is 8wt% in the part with the particle size greater than 0.3mm and 6wt% in the part with the particle size less than 0.075mm (sieving by water washing).
The steel slag is obtained by crushing a steel slag raw material to an average grain size of 6.5mm, aging for 16 months, and then using the steel slag raw material, wherein the steel slag raw material is hot-splashing steel slag of Hubeibao wu steel iron groups.
The mineral powder is obtained by grinding strong basic rock in limestone or magma rock.
The mineral powder is obtained by grinding limestone stones, and the average particle size of the mineral powder is 0.075mm.
The fiber material is basalt chopped fiber, the basalt chopped fiber has an average length of 6mm and an average diameter of 16 mu m, and is purchased from Taian Hongjiang New Material Co.
The preparation of the steel slag asphalt concrete ultrathin wearing layer comprises the following steps:
step 1: sequentially adding aggregate, steel slag and fiber materials, and dry-mixing for 15s to obtain a mixture 1;
step 2: adding SBS high-viscosity modified asphalt into the mixture 1, and stirring for 15s to obtain a mixture 2;
step 3: adding mineral powder into the mixture 2, and stirring for 45s to obtain the final product.
The preparation method of the steel slag doped asphalt concrete wearing layer comprises the following steps:
s1, finish milling is carried out on a road;
s2, sprinkling a modified asphalt concrete bonding layer;
s3, sprinkling an ultra-thin wearing layer of steel slag asphalt concrete, and compacting.
The sprinkling amount in the step S2 is 0.8kg/m 2 。
The temperature of the sprinkling cloth in the step S2 is 160 ℃.
The sprinkling amount in the step S3 is 0.9kg/m 2 。
The temperature of the sprinkling cloth in the step S3 is 170 ℃.
The compaction sequentially passes through initial compaction, re-compaction and final compaction.
The primary pressing adopts rigid static rolling pressure, and the number of primary pressing times is 2.
The back pressure adopts a vibratory roller, and the number of back pressure passes is 2.
And the final pressure adopts rigid rolling static pressure, and the number of the final pressure passes is 1.
Example 2
The detailed description is the same as example 1; the difference is that the ultra-thin wearing layer of the steel slag asphalt concrete in the embodiment 2 comprises 8 parts of SBS high-viscosity modified asphalt, 50 parts of aggregate, 18 parts of mineral powder, 12 parts of steel slag and 0.07 part of fiber material.
Example 3
The detailed description is the same as example 1; in contrast, the amount of the step S2 spread described in example 3 was 0.9kg/m 2 The sprinkling amount in the step S3 is 0.8kg/m 2 。
Comparative example 1
The detailed description is the same as example 1; in contrast, the weight ratio of coarse aggregate to fine aggregate in comparative example 1 was 1:1.5.
comparative example 2
The detailed description is the same as example 1; in contrast, the weight ratio of SBS modified asphalt to high viscosity modifier in comparative example 2 was 20:1.
performance test method
The superb wearing layers obtained in examples 1-3 and comparative examples 1-2 were subjected to performance testing, and the test data are presented in table 1.
Performance test data
TABLE 1

Claims (10)

1. The steel slag doped asphalt concrete wearing layer is characterized by comprising a steel slag asphalt concrete ultrathin wearing layer and a modified asphalt concrete bonding layer from top to bottom.
2. The steel slag doped asphalt concrete wearing layer according to claim 1, wherein the thickness of the super-tough high-strength wearing layer is 1.8-3cm.
3. The steel slag doped asphalt concrete wear layer of claim 2, wherein the modified asphalt concrete tie layer comprises an epoxy modified asphalt concrete tie layer having a tensile strength greater than 2MPa and an elongation at break greater than 100%.
4. The steel slag doped asphalt concrete wearing layer according to claim 3, wherein the steel slag asphalt concrete ultrathin wearing layer comprises 5-15 parts of SBS high-viscosity modified asphalt, 40-70 parts of aggregate, 10-30 parts of mineral powder, 5-15 parts of steel slag and 0.03-0.1 part of fiber material in parts by weight.
5. The steel slag doped asphalt concrete wear layer of claim 4, wherein said fibrous material comprises at least one of basalt chopped fibers, lignin.
6. The steel slag doped asphalt concrete wearing layer according to claim 5, wherein said SBS high viscosity modified asphalt comprises SBS modified asphalt and high viscosity modifier in a weight ratio of (8-12): 1.
7. the steel slag doped asphalt concrete wear layer of claim 6, wherein said high adhesion modificationThe density of the agent is 0.88-0.92g/cm 3 The grain diameter is 3-6mm, and the water absorption rate is 0.1-1%.
8. The steel slag doped asphalt concrete wearing layer according to claim 7, wherein the preparation of the steel slag asphalt concrete ultra-thin wearing layer comprises the following steps:
step 1: sequentially adding aggregate, steel slag and fiber materials, and dry-mixing for 10s-15s to obtain a mixture 1;
step 2: adding SBS high-viscosity modified asphalt into the mixture 1, and stirring for 10-20s to obtain a mixture 2;
step 3: adding mineral powder into the mixture 2, and stirring for 25-40s to obtain the final product.
9. A method of making a steel slag doped asphalt concrete wear layer according to claim 1, comprising the steps of:
s1, finish milling is carried out on a road;
s2, sprinkling a modified asphalt concrete bonding layer;
s3, sprinkling an ultra-thin wearing layer of steel slag asphalt concrete, and compacting.
10. A method for preparing a steel slag doped asphalt concrete wearing layer according to claim 9, characterized in that the amount of sprinkling in the step S2 is 0.6-0.9kg/m 2 。
CN202310388288.3A 2023-04-12 2023-04-12 Steel slag doped asphalt concrete wearing layer and preparation method thereof Pending CN116657481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310388288.3A CN116657481A (en) 2023-04-12 2023-04-12 Steel slag doped asphalt concrete wearing layer and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310388288.3A CN116657481A (en) 2023-04-12 2023-04-12 Steel slag doped asphalt concrete wearing layer and preparation method thereof

Publications (1)

Publication Number Publication Date
CN116657481A true CN116657481A (en) 2023-08-29

Family

ID=87716057

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310388288.3A Pending CN116657481A (en) 2023-04-12 2023-04-12 Steel slag doped asphalt concrete wearing layer and preparation method thereof

Country Status (1)

Country Link
CN (1) CN116657481A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104478300A (en) * 2014-12-18 2015-04-01 长安大学 Small-particle-size modified asphalt mixture thin paving material with high skid resistance
CN105366998A (en) * 2015-12-14 2016-03-02 上海中冶环境工程科技有限公司 Dense-graded bitumen surface layer concrete
CN110593046A (en) * 2019-09-30 2019-12-20 上海市政工程设计研究总院（集团）有限公司 High-strength durable steel slag permeable asphalt pavement structure
CN112430008A (en) * 2020-11-19 2021-03-02 内蒙古综合交通科学研究院有限责任公司 Steel slag stress absorbing layer material and preparation method thereof
CN113277778A (en) * 2021-06-25 2021-08-20 上海繁荣道路建设工程有限公司 Asphalt concrete and preparation method thereof
CN113582587A (en) * 2021-07-26 2021-11-02 东南大学 Extremely-thin anti-skid abrasion material based on steel slag aggregate and application thereof
CN114835439A (en) * 2022-06-02 2022-08-02 黄卫 Epoxy asphalt steel slag concrete ultrathin wearing layer and preparation method thereof
CN114855607A (en) * 2022-05-06 2022-08-05 山东高速股份有限公司 Asphalt pavement structure of cement concrete bridge deck and pavement construction method
CN115650639A (en) * 2022-11-17 2023-01-31 中铁四局集团有限公司 Steel slag anti-sliding wearing layer asphalt mixture and preparation method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104478300A (en) * 2014-12-18 2015-04-01 长安大学 Small-particle-size modified asphalt mixture thin paving material with high skid resistance
CN105366998A (en) * 2015-12-14 2016-03-02 上海中冶环境工程科技有限公司 Dense-graded bitumen surface layer concrete
CN110593046A (en) * 2019-09-30 2019-12-20 上海市政工程设计研究总院（集团）有限公司 High-strength durable steel slag permeable asphalt pavement structure
CN112430008A (en) * 2020-11-19 2021-03-02 内蒙古综合交通科学研究院有限责任公司 Steel slag stress absorbing layer material and preparation method thereof
CN113277778A (en) * 2021-06-25 2021-08-20 上海繁荣道路建设工程有限公司 Asphalt concrete and preparation method thereof
CN113582587A (en) * 2021-07-26 2021-11-02 东南大学 Extremely-thin anti-skid abrasion material based on steel slag aggregate and application thereof
CN114855607A (en) * 2022-05-06 2022-08-05 山东高速股份有限公司 Asphalt pavement structure of cement concrete bridge deck and pavement construction method
CN114835439A (en) * 2022-06-02 2022-08-02 黄卫 Epoxy asphalt steel slag concrete ultrathin wearing layer and preparation method thereof
CN115650639A (en) * 2022-11-17 2023-01-31 中铁四局集团有限公司 Steel slag anti-sliding wearing layer asphalt mixture and preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
吕伟民: "《沥青混合料设计原理与方法》", 31 January 2001, 同济大学出版社, pages: 267 *
李昶等: "《大跨径当桥面铺装力学分析与结构设计》", vol. 1, 30 September 2007, 东南大学出版社, pages: 188 *
李飞;陈勇鸿;高伏良;孙艳华;吴超凡;: "掺钢渣无机结合料稳定路面基层材料干缩温缩试验研究", 公路, no. 12, 25 December 2012 (2012-12-25) *

Similar Documents

Publication Publication Date Title
CN102173654B (en) Cold spraying type epoxy thin bridge deck paving material and preparation method thereof
CN101187193A (en) Half-flexible water drainage skid-free noise-reducing road surface pavement structure
CN102296514B (en) Anti-skating wearing layer of epoxy asphalt pavement and preparation method thereof
CN101200873A (en) Method for paving resin filling type asphalt concrete steel box-beam bridge deck combined structure
CN101235207B (en) Preparation method of asphalt pavement crevice embedding sealing material
CN103952958A (en) Method for rut maintaining and paving of municipal road
KR102020594B1 (en) Recycled cold asphalt concrete mixture and Construction thereof
CN103469713B (en) For wearing layer and the construction method thereof of preventive maintenance
CN111704415B (en) High-strength environment-friendly permeable material, preparation method thereof and pavement prepared from material
CN104692744A (en) Road patching material with favorable elasticity and abrasion resistance and application thereof
CN111705651A (en) Antiskid wearing layer for steel bridge deck pavement and maintenance method
CN112553994A (en) Composite pavement road with asphalt layer coated on sisal fiber cement-based composite material
CN110372295B (en) High-strength high-toughness light polyurethane rubber bridge deck pavement material and preparation thereof
CN104631269A (en) Synchronous pavement surface dressing material for steel slag aggregate for road maintenance, and construction method thereof
CN114835439B (en) Epoxy asphalt steel slag concrete ultrathin wearing layer and preparation method thereof
CN116657481A (en) Steel slag doped asphalt concrete wearing layer and preparation method thereof
CN202323706U (en) Repair structure for epoxy asphalt pavement pit slot
CN107059615B (en) Durable cement concrete bridge deck pavement structure
CN114075053B (en) Ultrathin overlay mixture for preventive maintenance of asphalt pavement, preparation method and additive
CN214831604U (en) Sisal fiber ECC (error correction code) coated asphalt layer composite pavement
CN110790535B (en) Maintenance method of asphalt road
CN114702266A (en) High-rubber asphalt ultrathin wearing layer and construction method thereof
CN113845332A (en) Preparation method of polyurethane concrete and rapid repair method of polyurethane concrete for airport pavement
CN112575641A (en) High-modulus anti-rutting asphalt pavement structure
CN112300587A (en) Composite rubber asphalt, mixture thereof and high-crack-resistant and anti-rutting three-layer rubber asphalt pavement structure containing mixture

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