CN110205895B - Green low-carbon environment-friendly road structure adopting recycled materials - Google Patents

Green low-carbon environment-friendly road structure adopting recycled materials Download PDF

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CN110205895B
CN110205895B CN201910315409.5A CN201910315409A CN110205895B CN 110205895 B CN110205895 B CN 110205895B CN 201910315409 A CN201910315409 A CN 201910315409A CN 110205895 B CN110205895 B CN 110205895B
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asphalt
mixture
recycled
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warm
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CN110205895A (en
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李玉梅
栗威
张永军
银晓东
徐冬梅
李攀
曹恒涛
肖珊珊
孟小培
王宇华
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Henan Transportation Research Institute Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • 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
    • E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
    • E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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  • Engineering & Computer Science (AREA)
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  • Structural Engineering (AREA)
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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses a green low-carbon environment-friendly road structure adopting recycled materials, which comprises a roadbed and a road surface which are sequentially arranged from bottom to top, wherein the roadbed comprises a embankment and a roadbed which are sequentially arranged from bottom to top, the embankment is made of recycled urban building waste mixed materials, and the roadbed is made of recycled urban building waste graded mixed materials; the pavement comprises a cushion layer, a subbase layer, a base layer, a lower surface layer, a middle surface layer and an upper surface layer which are arranged from bottom to top in sequence, wherein the cushion layer is made of recycled graded aggregate of building wastes. The invention can not only meet the requirement of the existing traffic development, but also solve the environmental problem left by the urban development and the problem that the infrastructure construction damages and exploits natural resources.

Description

Green low-carbon environment-friendly road structure adopting recycled materials
Technical Field
The invention relates to the field of road engineering, in particular to a green low-carbon environment-friendly road structure regenerated by adopting urban construction waste and old asphalt mixture.
Background
With the accelerated urbanization process in China, the large-scale transformation of old cities is actively promoted, a large number of waste buildings are dismantled, about 35 hundred million tons of annual building garbage are produced in China, and 43 percent and about 15 million tons of urban demolition garbage are produced in China. But the resource utilization rate of the construction waste is less than 5 percent and is far lower than 70 to 98 percent of developed countries and regions, and how to dispose the construction waste becomes one of the problems in various big cities in China.
Meanwhile, highway construction in China is also developed rapidly, however, energy consumption of highway construction is an extensive development mode, and although high-speed increase of highway mileage is realized, the development at the cost of environmental damage is difficult to continue. According to incomplete statistics, the form of the asphalt pavement in the high-grade highway in China is about 80-90%, the high-grade highway operated at an early stage starts to enter the major and intermediate repair periods, and highway maintenance, repair and reconstruction projects are gradually increased year by year. At present, the road network in China generates 2.2 million tons of waste asphalt pavement materials every year on average, and if the waste asphalt pavement materials can be put into use, the cost can be saved by 447 million RMB on average every year in the road construction process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a green low-carbon environment-friendly road structure adopting a recycled material, which can meet the requirement of the existing traffic development and solve the problems of environmental problems left by urban development and the problem of natural resource exploitation damage of infrastructure construction.
In order to achieve the purpose, the invention adopts the technical scheme that: a green low-carbon environment-friendly road structure adopting recycled materials comprises a roadbed and a road surface which are sequentially arranged from bottom to top, wherein the roadbed comprises a embankment and a roadbed which are sequentially arranged from bottom to top, the embankment is made of recycled urban construction waste mixed materials, and the roadbed is made of recycled urban construction waste graded mixed materials; the pavement comprises a cushion layer, a subbase layer, a base layer, a lower surface layer, a middle surface layer and an upper surface layer which are arranged from bottom to top in sequence, wherein the cushion layer is made of recycled graded aggregate of building wastes; the subbase layer and the base layer are made of cement-stable inorganic binder formed by mixing 0-50% of recycled aggregate of urban building waste or emulsified asphalt cold-recycled mixture formed by old asphalt mixture, the lower layer is made of warm-mix asphalt mixture or emulsified asphalt cold-recycled mixture formed by mixing 90-100% of old asphalt mixture, the middle layer is made of warm-mix asphalt mixture or hot-recycled asphalt mixture formed by mixing 0-40% of old asphalt mixture, and the upper layer is made of warm-mix rubber asphalt mixture with mixing 0-30% of rubber powder.
The urban building waste regeneration mixture adopted by the embankment comprises bricks, mortar and concrete, and the maximum particle size of the mixture is less than or equal to 150 mm.
The recycled graded mixture of the urban building wastes adopted by the road bed comprises brick particles, the content of the brick particles is less than or equal to 30%, the maximum particle size of the recycled graded mixture of the urban building wastes is less than or equal to 60mm, the content of particles with the particle size of 40-60 mm is 30-60%, the content of particles with the particle size of 5-40 mm is 20-30%, the content of particles with the particle size of 0-5mm is 0-10%, and the uneven coefficient of the recycled graded mixture of the urban building wastes is greater than or equal to 5.
The technical indexes of the urban building waste regeneration graded mixture adopted by the road bed are shown in table 1; the minimum strength and the maximum particle size of the filler of the urban construction waste regeneration graded mixture adopted by the roadbed and the urban construction waste regeneration mixture adopted by the embankment are required to be shown in table 2; the embankment and roadbed compaction quality control requirements are shown in table 3:
TABLE 1
Figure GDA0003151159010000021
TABLE 2
Figure GDA0003151159010000022
Figure GDA0003151159010000031
TABLE 3
Partitioning Porosity/% Differential/mm of sedimentation
Road bed ≤14 ≤3.0
Embankment ≤16 ≤5.0
The building waste recycled graded aggregate adopted by the cushion layer comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, the content of the concrete particles is greater than or equal to 80%, the particle size range of the building waste recycled graded aggregate is 5-31.5 mm, a waterproof bonding layer is arranged between the cushion layer and the base layer, and the waterproof bonding layer is made of rubber modified asphalt.
The subbase layer and the base layer are respectively made of cement-stabilized inorganic binder formed by doping 0% -50% of recycled aggregate of urban construction waste, the cement-stabilized inorganic binder comprises the recycled aggregate of the urban construction waste and binder, the recycled aggregate of the urban construction waste comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, and the content of the concrete particles is greater than or equal to 80%; the binder is ordinary portland cement P.O42.5 or a mixture of fly ash and ordinary cement, and the content of the fly ash in the mixture of the fly ash and the ordinary cement is 5-10%; the content of the binder in the subbase layer is 0.5-1.0% lower than that of the binder in the base layer; the stress absorbing layer is arranged between the base layer and the lower layer and is made of rubber-SBS modified asphalt binder, the rubber-SBS modified asphalt binder comprises rubber powder, the content of the rubber powder is 30%, the particle size of the rubber powder is larger than 40 meshes, and the technical indexes of the rubber-SBS modified asphalt binder are shown in Table 4:
TABLE 4
Figure GDA0003151159010000032
Figure GDA0003151159010000041
The subbase layer and the base layer are made of emulsified asphalt cold-recycling mixture formed by mixing 100% of old asphalt mixture, the particle size of the emulsified asphalt cold-recycling mixture is 0-30mm, and a sealing layer is arranged between the base layer and the lower layer.
The lower surface layer is made of a warm-mixed asphalt mixture or an emulsified asphalt cold-recycled mixture consisting of 90-100% of old asphalt mixture, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and a warm-mixing agent, the asphalt is 70# matrix asphalt, the grading is ATB-25\ AC-25, and the warm-mixing agent is Evotherm warm-mixing agent or CCNYJ-1 warm-mixing agent; the emulsified asphalt cold-recycling mixture formed by the old asphalt mixture with the mixing amount of 90-100 percent comprises asphalt cement, wherein the asphalt cement is slow-cracking type cation emulsified asphalt, and the grading is medium-grain type.
The middle surface layer is made of warm-mixed asphalt mixture or hot recycled asphalt mixture consisting of old asphalt mixture with the mixing amount of 35%, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and warm-mixed agent, the asphalt is shell No. 70 matrix asphalt, and the gradation is AC-20; the hot recycled asphalt mixture formed by the old asphalt mixture with the mixing amount of 35 percent comprises asphalt cement, wherein the asphalt cement is 70# matrix asphalt and the gradation is AC-20.
The upper surface layer is made of a warm-mixed rubber asphalt mixture doped with 30% of rubber powder, the warm-mixed rubber asphalt mixture doped with 30% of rubber powder comprises an asphalt cement and a warm-mixing agent, the asphalt cement is rubber-SBS modified asphalt, the warm-mixing agent is an Evotherm warm-mixing agent, the gradation is AC-16/SMA-16/AC-13/SMA-13, and the SMA-13\ SMA-16 is discontinuous gradation.
The invention uses the construction waste, the old asphalt mixture and other waste materials in road engineering as an effective way for resource utilization, can well solve the phenomenon of 'surrounding city by rubbish', saves a large amount of mine and land resources and protects the environment. The road structure provided by the invention can meet all levels of highways under the conditions of extra-heavy and heavy traffic loads, reduces the exploitation of natural stone materials, recycles a large amount of waste asphalt mixed materials, saves natural resources, protects the ecological environment and has good economic benefit and social significance.
According to the invention, the urban construction waste recycled mixture is adopted to replace the conventional clay material to fill the embankment, and the construction waste recycled graded mixture is adopted to replace the cement soil material to fill the roadbed, so that the utilization rate of the old material reaches 100%, the problem that urban construction waste cannot be treated is solved, the damage to farmland resources is reduced, and the specific economic benefit analysis is as follows:
taking a highway construction as an example, according to the roadbed filling height of 6m and the roadbed width of 60m, 36 ten thousand m of construction waste recycled materials can be effectively utilized per kilometer3Avoid 108 mu of farmland mining (accounting according to farmland soil mining depth 5 m), reduce 35 mu of urban construction waste occupation (accounting according to construction waste safe stacking height 15 m), save 50 tons of standard coal, reduce CO2Discharge 138.45 tons. Therefore, the construction method has the advantages that precious land resources can be released by utilizing the urban construction waste recycled material to fill the road embankment and the roadbed structure, a large amount of sandstone materials are saved, the major influence of exploitation of the sandstone materials on the environment is reduced, and compared with the conventional clay and cement soil materials, the construction waste recycled material has the characteristics of high strength, good stability, good durability of the roadbed and the roadbed, convenient construction process, difficulty in being influenced by weather, construction period and the like.
The emulsified asphalt regeneration mixture is used for paving a road subbase layer, a base layer and a lower layer, compared with the paving material of the traditional road, the utilization rate of the old material reaches more than 90 percent, and the pavement cold regeneration technology can regenerate and utilize natural resources such as asphalt, stone and the like, thereby reducing the exploitation of new petroleum and stone, reducing the construction cost, saving energy and protecting environment; the construction period is shortened, and the influence of construction on traffic is reduced; and the original geometric shape of the pavement can be kept, and the service performance of the pavement is improved. The investigation of the Federal road administration in America shows that the material cost can be saved by more than 50 percent by recycling the asphalt pavement, the pavement cost is reduced by about 25 percent, and the asphalt is saved by about 50 percent.
The cement-stabilized building waste recycled aggregate is adopted to replace the traditional cement-stabilized macadam and the traditional lime-fly-ash macadam as a road subbase, a base and a cushion layer, so that a large amount of garbage clearing cost and treatment cost are saved; the exploitation of natural gravel is reduced, a large amount of natural resources are saved, the ecological environment is protected, and local mineral resources are saved.
When the rubber-SBS modified asphalt mixture is used as the upper layer of the road instead of the traditional modified asphalt mixture, the rubber-SBS modified asphalt concrete has higher high-temperature deformation resistance and ageing resistance, excellent low-temperature performance and better fatigue resistance and reflection crack resistance, and the service life of the road is prolonged. According to the market price of the current heavy traffic asphalt, the modified asphalt and the rubber powder, the material cost of each ton of the rubber powder modified asphalt is saved by 17.5 percent compared with the SBS modified asphalt, and if the construction process of a dry mixing method is adopted, the material cost can be saved by about 6 percent due to the saving of the fuel cost and the related equipment cost (the processing cost of each ton of the modified asphalt is about 200 yuan) in the processing process of the modified asphalt.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
As shown in fig. 1, a green low-carbon environment-friendly road structure using recycled materials comprises a roadbed and a road surface which are sequentially arranged from bottom to top, wherein the roadbed comprises a embankment 1 and a roadbed 2 which are sequentially arranged from bottom to top, the embankment 1 is made of recycled urban building waste mixed materials, and the roadbed 2 is made of recycled urban building waste graded mixed materials; the pavement comprises a cushion layer 3, a subbase layer 4, a base layer 5, a lower surface layer 6, a middle surface layer 7 and an upper surface layer 8 which are arranged from bottom to top in sequence, wherein the cushion layer 3 is made of construction waste recycled graded aggregate; the subbase 4 and the base 5 are made of cement-stable inorganic binder or emulsified asphalt cold-recycled mixture composed of old asphalt mixture mixed with 0% -50% of recycled aggregate of urban building waste, the lower layer 6 is made of warm-mix asphalt mixture or emulsified asphalt cold-recycled mixture composed of old asphalt mixture mixed with 90% -100%, the middle layer 7 is made of warm-mix asphalt mixture or hot-recycled asphalt mixture composed of old asphalt mixture mixed with 0% -40%, and the upper layer 8 is made of warm-mix rubber asphalt mixture mixed with 0% -30% of rubber powder.
The embankment 1 adopts the recycled mixture of urban building wastes comprising bricks, mortar and concrete, and the maximum grain diameter of the mixture is less than or equal to 150mm after the mixture is crushed by a simple process.
The regeneration graded mixture of the municipal construction wastes adopted by the road bed 2 comprises brick particles, the content of the brick particles is less than or equal to 30%, the maximum particle size of the regeneration graded mixture of the municipal construction wastes after processing treatment is less than or equal to 60mm, wherein the content of the particles with the particle size of 40-60 mm is 30-60%, the content of the particles with the particle size of 5-40 mm is 20-30%, the content of the particles with the particle size of 0-5mm is 0-10%, and the uneven coefficient of the regeneration graded mixture of the municipal construction wastes is greater than or equal to 5.
The technical indexes of the urban construction waste regeneration graded mixture adopted by the road bed 2 are shown in table 1;
the minimum strength and the maximum particle size of the filler of the urban construction waste regeneration graded mixture adopted by the roadbed 2 and the urban construction waste regeneration mixture adopted by the embankment 1 are as shown in the table 2;
the embankment 1 and roadbed 2 compaction quality control requirements are shown in table 3:
TABLE 1
Figure GDA0003151159010000061
TABLE 2
Figure GDA0003151159010000062
TABLE 3
Figure GDA0003151159010000063
Figure GDA0003151159010000071
The construction waste recycled graded aggregate adopted by the cushion layer 3 comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, the content of the concrete particles is greater than or equal to 80%, the particle size range of the brick particles, the mortar particles and the concrete particles after processing and screening is 5-31.5 mm, the construction rolling quality is controlled by adopting a compactness index, a sand filling method test is adopted for detection, and the control qualified standard is according to the design requirement of a construction drawing. A waterproof bonding layer 9 is arranged between the cushion layer 3 and the bottom base layer 4, after the cushion layer 3 is constructed, the waterproof bonding layer 9 is required to be processed after the quality detection is qualified, and the waterproof bonding layer 9 is made of rubber modified asphalt; the waterproof bonding layer 9 adopts rubber modified asphalt to replace the traditional emulsified asphalt and other materials, and has the advantages of strong deformation resistance, difficult emulsification and cracking, and good bonding and waterproof effects.
The base layer 4 and the base layer 5 are respectively made of cement-stabilized inorganic binder formed by doping 0-50% of recycled aggregate of urban construction waste, the cement-stabilized inorganic binder comprises the recycled aggregate of the urban construction waste and binder, the recycled aggregate of the urban construction waste adopted by the base layer 4 and the base layer 5 comprises brick particles, mortar particles and concrete particles, the grain sizes of the recycled aggregate of the urban construction waste adopted by the base layer 4 and the base layer 5 are divided into 5-10mm, 10-20mm and 20-30mm through screening, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, and the content of the concrete particles is greater than or equal to 80%; the binder is ordinary portland cement P.O42.5 or a mixture of fly ash (replacing the proportion of a cement material) and ordinary cement, the content of the fly ash in the mixture of the fly ash and the ordinary cement is 5-10%, and the fly ash adopts the standard of grade III and above in fly ash for cement and concrete (GB/T1596-; the grading of the subbase layer 4 and the base layer 5 adopts a skeleton-compact anti-cracking grading structure, the mix proportion design adopts a vibration compaction forming method to replace a conventional heavy compaction test method, the vibration compaction forming method can improve the maximum dry density of the cement stable binder, reduce the optimal water content and facilitate the site construction of the cement stable binder; in the construction process, the vibration stirring equipment is adopted to replace the conventional double-horizontal stirring equipment to produce the cement stabilizing binder, so that the distribution uniformity of cement in the mixture can be further improved, the uniform mixing effect of the cement stabilizing binder is promoted, and the mechanical property of the cement stabilizing binder can be improved under the condition of not improving the cement material; the content of the binder in the subbase layer 4 is 0.5-1.0% lower than that of the binder in the base layer 5; a stress absorbing layer 10 is arranged between the base layer 5 and the lower layer 6, the stress absorbing layer 10 is made of rubber-SBS modified asphalt binder, the rubber-SBS modified asphalt binder comprises rubber powder, the content of the rubber powder is 30%, the particle size of the rubber powder is larger than 40 meshes, the particle size of the rubber powder is preferably 80 meshes, and the technical indexes of the rubber-SBS modified asphalt binder are shown in Table 4:
TABLE 4
Figure GDA0003151159010000072
Figure GDA0003151159010000081
The lower surface layer 6 is made of a warm-mix asphalt mixture or an emulsified asphalt cold-recycled mixture consisting of 90-100% of old asphalt mixture, the warm-mix asphalt mixture comprises aggregate, mineral powder, asphalt and a warm-mix agent, a skeleton-dense gradation is adopted, the asphalt is 70# matrix asphalt, the gradation is ATB-25\ AC-25, and the warm-mix agent is selected from the type of the technical principle of surface activity viscosity reduction, such as Eventerm warm-mix agent, CCNYJ-1 warm-mix agent and the like; the emulsified asphalt cold-recycling mixture formed by old asphalt mixture with the mixing amount of 90-100% comprises asphalt cement, the optimal emulsified asphalt using amount and the optimal water using amount of the emulsified asphalt cold-recycling mixture formed by old asphalt mixture with the mixing amount of 90-100% are determined by adopting a rotary compaction test method, the asphalt cement is slow-breaking type cation emulsified asphalt, the grading is medium-grain type, the construction temperature of the emulsified asphalt cold-recycling mixture is above 10 ℃, a complete core sample can be taken out after the emulsified asphalt cold-recycling mixture is paved for 3 days or the maintenance is finished when the water content is lower than 2%, and meanwhile, a proper regenerating agent can be added according to the performance of the old asphalt mixture.
The middle surface layer 7 is made of warm-mixed asphalt mixture or hot recycled asphalt mixture consisting of old asphalt mixture with the mixing amount of 35 percent, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and warm-mixed agent, the asphalt is shell No. 70 matrix asphalt, and the gradation is AC-20; the hot recycled asphalt mixture composed of 35% old asphalt mixture comprises asphalt cement, the asphalt cement is 70# matrix asphalt, the gradation is AC-20, a framework-dense structure is adopted, the hot recycled asphalt mixture is produced by adopting a plant-mixing hot recycling technology, the old asphalt mixture is a material obtained by processing and processing the asphalt mixture generated in the reconstruction and extension processes of the asphalt pavement, the grain sizes are 0-5mm, 5-10mm and 10-20mm respectively, the adding amount of the old asphalt mixture can be any one of 3 grain sizes, or all the old asphalt mixtures can be simultaneously added, and the mix proportion design is carried out according to the condition of raw materials.
The upper surface layer 8 is made of a warm-mix rubber asphalt mixture doped with 30% of rubber powder, the warm-mix rubber asphalt mixture doped with 30% of rubber powder comprises an asphalt cement and a warm-mix agent, the asphalt cement is rubber-SBS modified asphalt, the technical index meets the requirement of table 4, the warm-mix agent is Evotherm of the technical principle of surface activity viscosity reduction, the grading is AC-16/SMA-16/AC-13/SMA-13, wherein the SMA-13\ SMA-16 is discontinuous grading, and the mixing ratio design is carried out by adopting a Suppove method; the warm-mixed rubber asphalt mixture has high-temperature deformation resistance, ageing resistance, excellent low-temperature performance and good fatigue resistance and reflection crack resistance; the rubber asphalt technology is characterized by environmental protection, noise reduction and resource saving, and the material cost of each ton of rubber powder modified asphalt is saved by 17.5 percent compared with the SBS modified asphalt according to the market price of the current heavy traffic asphalt, modified asphalt and rubber powder, and if the construction process of a dry mixing method is adopted, the material cost can be saved by about 6 percent due to the saving of the fuel cost and the related equipment cost (the processing cost of each ton of modified asphalt is about 200 yuan) in the processing process of the modified asphalt. The technology can be comprehensively popularized and applied in China, and provides a perpetual environment-friendly solution for black pollution of materials such as waste tires.
Example 2
As shown in fig. 2, a green low-carbon environment-friendly road structure using recycled materials comprises a roadbed and a road surface which are sequentially arranged from bottom to top, wherein the roadbed comprises a embankment 1 and a roadbed 2 which are sequentially arranged from bottom to top, the embankment 1 is made of recycled urban building waste mixed materials, and the roadbed 2 is made of recycled urban building waste graded mixed materials; the pavement comprises a cushion layer 3, a subbase layer 4, a base layer 5, a lower surface layer 6, a middle surface layer 7 and an upper surface layer 8 which are arranged from bottom to top in sequence, wherein the cushion layer 3 is made of construction waste recycled graded aggregate; the subbase 4 and the base 5 are made of cement-stable inorganic binder or emulsified asphalt cold-recycled mixture composed of old asphalt mixture mixed with 0% -50% of recycled aggregate of urban building waste, the lower layer 6 is made of warm-mix asphalt mixture or emulsified asphalt cold-recycled mixture composed of old asphalt mixture mixed with 90% -100%, the middle layer 7 is made of warm-mix asphalt mixture or hot-recycled asphalt mixture composed of old asphalt mixture mixed with 0% -40%, and the upper layer 8 is made of warm-mix rubber asphalt mixture mixed with 0% -30% of rubber powder.
The embankment 1 adopts the recycled mixture of urban building wastes comprising bricks, mortar and concrete, and the maximum grain diameter of the mixture is less than or equal to 150mm after the mixture is crushed by a simple process.
The regeneration graded mixture of the municipal construction wastes adopted by the road bed 2 comprises brick particles, the content of the brick particles is less than or equal to 30%, the maximum particle size of the regeneration graded mixture of the municipal construction wastes after processing treatment is less than or equal to 60mm, wherein the content of the particles with the particle size of 40-60 mm is 30-60%, the content of the particles with the particle size of 5-40 mm is 20-30%, the content of the particles with the particle size of 0-5mm is 0-10%, and the uneven coefficient of the regeneration graded mixture of the municipal construction wastes is greater than or equal to 5.
The technical indexes of the urban construction waste regeneration graded mixture adopted by the road bed 2 are shown in table 1;
the minimum strength and the maximum particle size of the filler of the urban construction waste regeneration graded mixture adopted by the roadbed 2 and the urban construction waste regeneration mixture adopted by the embankment 1 are as shown in the table 2;
the embankment 1 and roadbed 2 compaction quality control requirements are shown in table 3:
TABLE 1
Figure GDA0003151159010000091
Figure GDA0003151159010000101
TABLE 2
Figure GDA0003151159010000102
TABLE 3
Partitioning Porosity/% Differential/mm of sedimentation
Road bed
2 ≤14 ≤3.0
Embankment 1 ≤16 ≤5.0
The construction waste recycled graded aggregate adopted by the cushion layer 3 comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, the content of the concrete particles is greater than or equal to 80%, the particle size range of the brick particles, the mortar particles and the concrete particles after processing and screening is 5-31.5 mm, the construction rolling quality is controlled by adopting a compactness index, a sand filling method test is adopted for detection, and the control qualified standard is according to the design requirement of a construction drawing. A waterproof bonding layer 9 is arranged between the cushion layer 3 and the bottom base layer 4, after the cushion layer 3 is constructed, the waterproof bonding layer 9 is required to be processed after the quality detection is qualified, and the waterproof bonding layer 9 is made of rubber modified asphalt; the waterproof bonding layer 9 adopts rubber modified asphalt to replace the traditional emulsified asphalt and other materials, and has the advantages of strong deformation resistance, difficult emulsification and cracking, and good bonding and waterproof effects.
The subbase layer 4 and the base layer 5 are respectively made of emulsified asphalt cold-recycling mixture formed by mixing 100% of old asphalt mixture, the particle size of the emulsified asphalt cold-recycling mixture is 0-30mm, and a sealing layer 11 is arranged between the base layer 5 and the lower surface layer 6.
The lower surface layer 6 is made of a warm-mix asphalt mixture or an emulsified asphalt cold-recycled mixture consisting of 90-100% of old asphalt mixture, the warm-mix asphalt mixture comprises aggregate, mineral powder, asphalt and a warm-mix agent, a skeleton-dense gradation is adopted, the asphalt is 70# matrix asphalt, the gradation is ATB-25\ AC-25, and the warm-mix agent is selected from the type of the technical principle of surface activity viscosity reduction, such as Eventerm warm-mix agent, CCNYJ-1 warm-mix agent and the like; the emulsified asphalt cold-recycling mixture formed by old asphalt mixture with the mixing amount of 90-100% comprises asphalt cement, the optimal emulsified asphalt using amount and the optimal water using amount of the emulsified asphalt cold-recycling mixture formed by old asphalt mixture with the mixing amount of 90-100% are determined by adopting a rotary compaction test method, the asphalt cement is slow-breaking type cation emulsified asphalt, the grading is medium-grain type, the construction temperature of the emulsified asphalt cold-recycling mixture is above 10 ℃, a complete core sample can be taken out after the emulsified asphalt cold-recycling mixture is paved for 3 days or the maintenance is finished when the water content is lower than 2%, and meanwhile, a proper regenerating agent can be added according to the performance of the old asphalt mixture.
The middle surface layer 7 is made of warm-mixed asphalt mixture or hot recycled asphalt mixture consisting of old asphalt mixture with the mixing amount of 35 percent, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and warm-mixed agent, the asphalt is shell No. 70 matrix asphalt, and the gradation is AC-20; the hot recycled asphalt mixture composed of 35% old asphalt mixture comprises asphalt cement, the asphalt cement is 70# matrix asphalt, the gradation is AC-20, a framework-dense structure is adopted, the hot recycled asphalt mixture is produced by adopting a plant-mixing hot recycling technology, the old asphalt mixture is a material obtained by processing and processing the asphalt mixture generated in the reconstruction and extension processes of the asphalt pavement, the grain sizes are 0-5mm, 5-10mm and 10-20mm respectively, the adding amount of the old asphalt mixture can be any one of 3 grain sizes, or all the old asphalt mixtures can be simultaneously added, and the mix proportion design is carried out according to the condition of raw materials.
The upper surface layer 8 is made of a warm-mix rubber asphalt mixture doped with 30% of rubber powder, the warm-mix rubber asphalt mixture doped with 30% of rubber powder comprises an asphalt cement material and a warm-mix agent, the asphalt cement material is rubber-SBS modified asphalt, the warm-mix agent is Evotherm of the technical principle of surface activity viscosity reduction, the grading is AC-16/SMA-16/AC-13/SMA-13, wherein SMA-13\ SMA-16 is discontinuous grading, and the mixing ratio design is carried out by adopting a Suppove method; the warm-mixed rubber asphalt mixture has high-temperature deformation resistance, ageing resistance, excellent low-temperature performance and good fatigue resistance and reflection crack resistance; the rubber asphalt technology is characterized by environmental protection, noise reduction and resource saving, and the material cost of each ton of rubber powder modified asphalt is saved by 17.5 percent compared with the SBS modified asphalt according to the market price of the current heavy traffic asphalt, modified asphalt and rubber powder, and if the construction process of a dry mixing method is adopted, the material cost can be saved by about 6 percent due to the saving of the fuel cost and the related equipment cost (the processing cost of each ton of modified asphalt is about 200 yuan) in the processing process of the modified asphalt. The technology can be comprehensively popularized and applied in China, and provides a perpetual environment-friendly solution for black pollution of materials such as waste tires.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.

Claims (7)

1. The utility model provides an adopt green low carbon environment-friendly road structure of recycled material which characterized in that: the road bed is made of recycled urban construction waste mixed materials, and the road bed is made of recycled urban construction waste graded mixed materials; the pavement comprises a cushion layer, a subbase layer, a base layer, a lower surface layer, a middle surface layer and an upper surface layer which are arranged from bottom to top in sequence, wherein the cushion layer is made of recycled graded aggregate of building wastes; the subbase layer and the base layer are made of cement-stabilized inorganic binder formed by mixing 0% -50% of recycled aggregate of urban building waste or emulsified asphalt cold-recycled mixture formed by old asphalt mixture, and the lower layer is made of warm-mixed asphalt mixture or emulsified asphalt cold-recycled mixture formed by old asphalt mixture with mixing amount of 90% -100%; the middle surface layer is made of warm-mixed asphalt mixture or hot recycled asphalt mixture with the mixing amount of 0-40 percent of old asphalt mixture; the upper surface layer is made of warm-mixed rubber asphalt mixture with 0-30% of rubber powder;
the urban building waste regeneration mixture adopted by the embankment comprises bricks, mortar and concrete, and the maximum particle size of the mixture is less than or equal to 150 mm;
the recycled graded mixture of the urban building wastes adopted by the road bed comprises brick particles, the content of the brick particles is less than or equal to 30%, the maximum particle size of the recycled graded mixture of the urban building wastes is less than or equal to 60mm, wherein the content of the particles with the particle size of 40-60 mm is 30-60%, the content of the particles with the particle size of 5-40 mm is 20-30%, the content of the particles with the particle size of 0-5mm is 0-10%, and the uneven coefficient of the recycled graded mixture of the urban building wastes is greater than or equal to 5;
the technical indexes of the urban building waste regeneration graded mixture adopted by the road bed are shown in table 1; the minimum strength and the maximum particle size of the filler of the urban construction waste regeneration graded mixture adopted by the roadbed and the urban construction waste regeneration mixture adopted by the embankment are required to be shown in table 2; the embankment and bed compaction quality control requirements are shown in table 3,
TABLE 1
Figure FDA0003151155000000011
Figure FDA0003151155000000021
TABLE 2
Figure FDA0003151155000000022
TABLE 3
Partitioning Porosity/% Differential/mm of sedimentation Road bed ≤14 ≤3.0 Embankment ≤16 ≤5.0
。
2. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the building waste recycled graded aggregate adopted by the cushion layer comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, the content of the concrete particles is greater than or equal to 80%, the particle size range of the building waste recycled graded aggregate is 5-31.5 mm, a waterproof bonding layer is arranged between the cushion layer and the base layer, and the waterproof bonding layer is made of rubber modified asphalt.
3. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the subbase layer and the base layer are respectively made of cement-stabilized inorganic binder formed by doping 0% -50% of recycled aggregate of urban construction waste, the cement-stabilized inorganic binder comprises the recycled aggregate of the urban construction waste and binder, the recycled aggregate of the urban construction waste comprises brick particles, mortar particles and concrete particles, the content of the brick particles is less than or equal to 10%, the content of the mortar particles is less than or equal to 10%, and the content of the concrete particles is greater than or equal to 80%; the binder is ordinary portland cement P.O42.5 or a mixture of fly ash and ordinary cement, and the content of the fly ash in the mixture of the fly ash and the ordinary cement is 5-10%; the content of the binder in the subbase layer is 0.5-1.0% lower than that of the binder in the base layer; the stress absorbing layer is arranged between the base layer and the lower layer and is made of rubber-SBS modified asphalt binder, the rubber-SBS modified asphalt binder comprises rubber powder, the content of the rubber powder is 30%, the particle size of the rubber powder is larger than 40 meshes, and the technical indexes of the rubber-SBS modified asphalt binder are shown in Table 4:
TABLE 4
Figure FDA0003151155000000031
Figure FDA0003151155000000041
4. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the subbase layer and the base layer are made of emulsified asphalt cold-recycling mixture formed by mixing 100% of old asphalt mixture, the particle size of the emulsified asphalt cold-recycling mixture is 0-30mm, and a sealing layer is arranged between the base layer and the lower layer.
5. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the lower surface layer is made of a warm-mixed asphalt mixture or an emulsified asphalt cold-recycled mixture consisting of 90-100% of old asphalt mixture, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and a warm-mixing agent, the asphalt is 70# matrix asphalt, the grading is ATB-25\ AC-25, and the warm-mixing agent is Evotherm warm-mixing agent or CCNYJ-1 warm-mixing agent; the emulsified asphalt cold-recycling mixture formed by the old asphalt mixture with the mixing amount of 90-100 percent comprises asphalt cement, wherein the asphalt cement is slow-cracking type cation emulsified asphalt, and the grading is medium-grain type.
6. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the middle surface layer is made of warm-mixed asphalt mixture or hot recycled asphalt mixture consisting of old asphalt mixture with the mixing amount of 35%, the warm-mixed asphalt mixture comprises aggregate, mineral powder, asphalt and warm-mixed agent, the asphalt is shell No. 70 matrix asphalt, and the gradation is AC-20; the hot recycled asphalt mixture formed by the old asphalt mixture with the mixing amount of 35 percent comprises asphalt cement, wherein the asphalt cement is 70# matrix asphalt and the gradation is AC-20.
7. The green, low-carbon and environment-friendly road structure adopting the recycled material as claimed in claim 1, is characterized in that: the upper surface layer is made of a warm-mixed rubber asphalt mixture doped with 30% of rubber powder, the warm-mixed rubber asphalt mixture doped with 30% of rubber powder comprises an asphalt cement and a warm-mixing agent, the asphalt cement is rubber-SBS modified asphalt, the warm-mixing agent is an Evotherm warm-mixing agent, the gradation is AC-16/SMA-16/AC-13/SMA-13, and the SMA-13\ SMA-16 is discontinuous gradation.
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