CN104164817B - A kind of method for designing of the heat regeneration asphalt mixture of high RAP ratio - Google Patents
A kind of method for designing of the heat regeneration asphalt mixture of high RAP ratio Download PDFInfo
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Abstract
The invention belongs to road engineering technical field, be specifically related to the method for designing of the heat regeneration asphalt mixture of a kind of high RAP ratio.The method includes controlling the variability of RAP material, improving regenerative agent regeneration effect and determine suitable experimental condition.Can be effectively improved RAP aspect ratio and recycling asphalt mixtures performance meets relevant regulations, the mixed ratio rate of RAP can reach 36%.The present invention well make use of RAP material, has saved resource, it is to avoid the waste of material, is effectively reduced the material cost of highway construction, also can reduce the resource exploitation destruction to environment simultaneously, and the economical and environmentally friendly advantage of this technology is fairly obvious.
Description
Technical field
The invention belongs to road engineering technical field, the heat regeneration asphalt being specifically related to a kind of high RAP ratio mixes
Close the method for designing of material.
Background technology
RAP is transported back batching plant, then Convergency fracturing after milling by heated tool butt-welding bituminous paving exactly, according to
The prescription of road surface different levels, carries out proportion design, determines the adding proportion of RAP, regenerative agent, new
Asphalt material, newly gather materials, the compound of mix Cheng Xin the most again, thus obtain excellent again
Raw asphalt, making becomes reclaimed bituminous pavement.
The traffic infrastructure of China had been main to turn to construction and maintenance to lay equal stress on by construction in the last few years, every year by
The RAP produced in road maintenance is more than 10,000,000 tons, and these RAP are deposited near roads, on the one hand take
A large amount of arable lands, pollute environment, on the other hand owing to containing ore materials and Colophonium, they are also in these RAP
There is higher value, give it up and cause the huge waste of resource, and the exploitation of new mineral aggregate be easier to right
Mountain forest damages, and causes the environmental problems such as soil erosion.
According to the investigation of Highway Administration of the United States Federal, if RAP can be regenerated use, can save
Master Cost 53.4%, Colophonium saving 50%, bituminous paving cost saves nearly 1/4th, the warp that China draws
Test with the most substantially the same.
Owing to Applied of Asphalt Pavement Recycle Technique can be made rational use of resources, the material being effectively reduced highway construction becomes
This, also can reduce the resource exploitation destruction to environment simultaneously, and the economical and environmentally friendly advantage of this technology is fairly obvious,
It it is the hot technology of present industry research.
But be affected by RAP material variability impact (include RAP Asphalt Content, the degree of aging of RAP,
Fines in RAP grating, RAP water content, RAP (particle diameter < 0.075mm) content) so that China RAP mixes and joins
Rate is generally 10～25%, the too high meeting of RAP mixture proportion cause produce recycling asphalt mixtures performance cannot
Meet current Chinese code of practice requirement.Therefore, it is quite necessary to high RAP ratio reclaimed asphalt mixture is set
Meter method is studied, by suitably design so that reclaimed asphalt mixture is meeting current specifications requirement
On the basis of improve RAP aspect ratio.
Summary of the invention
Problem to be solved by this invention is: provide the heat regeneration asphalt mixture of a kind of high RAP ratio to design
Method, can be effectively improved RAP aspect ratio and recycling asphalt mixtures performance meets the " public affairs that China is existing
Road Asphalt Pavement Construction Technique specification " (JTG F40-2004) requirement.
The method for designing of the heat regeneration asphalt mixture of a kind of high RAP ratio, including the change controlling RAP material
The opposite sex, improve regenerative agent regeneration effect and determine suitable experimental condition.
Such scheme preferably, the variability of described control RAP material include former pavement breaking after RAP
Material carries out the step of crushing and screening, and during described crushing and screening, RAP material keeps dry state, and controls RAP
In material, water content accounts for the mass percent of RAP material is less than 2%.Described crushing and screening is to reduce RAP
The variability of material.
Any of the above-described scheme preferably, carries out stepping according to size after the screening of described RAP material fragmentation.
Preferably, described stepping is divided into three class, the RAP material of described three class to any of the above-described scheme
Material size is respectively 3-5mm, 5-10mm, 10-15mm, and the RAP material of described three class is deposited respectively
Put.To prevent from being mutually mixed.Should remove particle diameter in RAP material during screening is 0-2.36mm (not including 0mm)
Part, be to prevent fines from the performance of reclaimed asphalt mixture being impacted.Described 3-5mm includes
3mm, without 5mm；Described 5-10mm, including 5mm, without 10mm；Described 10-15mm, including 10mm,
15mm。
Preferably, described raising regenerative agent regeneration effect is by high-performance bitumen regenerant to any of the above-described scheme
Use spray pattern to be uniformly dispensed onto on the RAP material of preheating, while spraying regenerative agent, stir RAP material.
It is to make regenerative agent be fully contacted with RAP material that regenerative agent limit stirring RAP material is sprayed on limit, plays regeneration
The effect of agent, improves the regeneration effect to high-performance regenerative agent.
Preferably, the preheating temperature of described RAP material is 110-120 DEG C to any of the above-described scheme, preheating time
For 1.5-2h.
Any of the above-described scheme preferably, after described RAP sprays materials high-performance bitumen regenerant be incubated 0.5～
1h, described holding temperature is 110-120 DEG C.
Preferably, described raising regenerative agent regeneration effect includes by test RAP material any of the above-described scheme
In the performance of aged asphalt determine the step of optimal regenerative agent dosage；Aging in described test RAP material
The performance of Colophonium is to be regenerated described aged asphalt by interpolation regenerative agent, then uses needle penetration classification
The effect of regeneration asphalt is evaluated by appraisement system, finally according to the regeneration effect of regeneration asphalt to regenerative agent
Dosage is adjusted, and determines optimal regenerative agent dosage；Described interpolation regenerative agent is to utilize spline fit method to determine regeneration
The initial additive capacity of agent.
Preferably, described optimal regenerative agent accounts for the quality hundred of aged asphalt in RAP material to any of the above-described scheme
Proportion by subtraction is 10%.
Any of the above-described scheme preferably, described determine suitable experimental condition include stepping after RAP material
Material carries out the step of sampling extraction test and sieve test, obtains RAP material in each class by extraction test
In the performance of aged asphalt and content, obtain RAP material material in each class by sieve test
Grating.RAP material mixing in reclaimed asphalt mixture is may determine that by the grating of RAP material material
Proportioning example.
Preferably, described extraction test is recovery aged asphalt from RAP material to any of the above-described scheme, and
The performance of aged asphalt is tested.Can be according to " highway engineering Colophonium and Asphalt Mixture Experiment code "
In (JTG E20-2011), T0726-2011 reclaims the method (Abson method) of Colophonium from asphalt
Reclaim aged asphalt and its performance is tested.
Any of the above-described scheme preferably, described determines that suitable experimental condition includes heat regeneration asphalt mixture
Gradation design.
Preferably, during described heat regeneration asphalt mixture gradation design, breeze accounts for and gathers materials any of the above-described scheme
The percentage ratio of gross mass be 4～5%.Owing to RAP material powder content is more, therefore suitably reduce new breeze
Consumption, obtains suitable grating by repeatedly adjusting each shelves RAP material with virgin material ratio.
Any of the above-described scheme preferably, during described heat regeneration asphalt mixture gradation design, described RAP material
It is 36% that material accounts for the percentage ratio of the gross mass gathered materials.RAP material mixture proportion is by RAP material material
Grating determines.Described gradation design is according to " standard specification for construction and acceptance of highway asphalt pavement " (JTG
F40-2004) in, AC-13C type asphalt carries out gradation design.
Described gathering materials is made up of new mineral aggregate and RAP material.For described new mineral aggregate is relative RAP material.
Any of the above-described scheme preferably, described determines that suitable experimental condition includes determining that regeneration asphalt mixes
Material the step mixing and stirring temperature and forming temperature, described reclaimed asphalt mixture mix and stir temperature and forming temperature
Be by test regeneration asphalt viscosity and draw regeneration asphalt viscosity-temperature curve determine.Described mix and stir temperature
Degree refer to insulation after RAP, new mineral aggregate, new Colophonium, breeze mix and stir temperature.
Any of the above-described scheme preferably, viscosity-temperature curve when described regeneration asphalt viscosity is 0.17 ± 0.02pa.s
What corresponding temperature raising 10 DEG C was reclaimed asphalt mixture mixes and stirs temperature；Described regeneration asphalt viscosity is
During 0.28 ± 0.03pa.s, the temperature corresponding to viscosity-temperature curve improves the molding temperature that 10 DEG C is reclaimed asphalt mixture
Degree.
Preferably, the temperature of mixing and stirring of described reclaimed asphalt mixture is 170 DEG C to any of the above-described scheme, molding temperature
Degree is 160 DEG C.
Any of the above-described scheme preferably, described determines suitable experimental condition to include with initial optimal Colophonium to use
Based on amount, it is shaped some groups of marshal pieces；Test respectively often organize the density of test specimen, voidage,
The mechanics volume parameters such as Colophonium saturation, degree of stability, flow valuve, draw density, voidage, Colophonium saturation,
Relation curve between degree of stability, flow valuve and asphalt content, determines asphalt optimum content；Described initial optimal
It is 4.2% that asphalt content accounts for the mass percent of reclaimed asphalt mixture.
Preferably, described asphalt optimum content accounts for the percent mass of reclaimed asphalt mixture to any of the above-described scheme
Ratio is 5.2%.
Any of the above-described scheme preferably, at asphalt optimum content compacted under reclaimed asphalt mixture, is surveyed respectively
High temperature anti-rut behavior, low temperature anti-cracking performance and the anti-water damage property of the reclaimed asphalt mixture of examination molding.
When these indexs meet China existing " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) requirement,
Illustrate that grating and the asphalt optimum content of the heat regeneration asphalt mixture of design are reasonable.
Any of the above-described scheme preferably, described determines that suitable experimental condition also includes determining the new mineral aggregate of addition
And design the step of new mineral aggregate gradation；Described new mineral aggregate preheats before adding, and is incubated at least 4h.
Preferably, the preheating temperature of described new mineral aggregate is any of the above-described schemeWherein: c is
New mineral aggregate preheating temperature, DEG C；A is RAP material preheater temperature, DEG C；B for mixing and stirring temperature, DEG C；N is RAP
Material is mixed and is joined mass ratio.
Any of the above-described scheme preferably, described new mineral aggregate include particle diameter be respectively 10-15mm, 5-10mm,
The new mineral aggregate of 3-5mm and Machine-made Sand, breeze five kinds.
Any of the above-described scheme preferably, the method for designing of the heat regeneration asphalt mixture of described high RAP ratio
Also include that the step that reclaimed asphalt mixture mixes and stirs, the step that described reclaimed asphalt mixture mixes and stirs include: first
First, by the new mineral aggregate without breeze of preheating together with the RAP material after sprinkling high-performance bitumen regenerant
Dry mixing 90s in mix pot, in order to after ensureing the new mineral aggregate without breeze and spraying high-performance bitumen regenerant
RAP material carry out sufficient heat exchange；Secondly, add new Colophonium, and with the new ore deposit without breeze
RAP material after material, sprinkling high-performance bitumen regenerant mixes and stirs 90s；It is eventually adding breeze, and without ore deposit
RAP material, new Colophonium after the new mineral aggregate of powder, sprinkling high-performance bitumen regenerant mix and stir 90s.
Prepared by a kind of method for designing by the heat regeneration asphalt mixture of the high RAP ratio described in any of the above-described kind
The heat regeneration asphalt mixture of high RAP ratio.
The heat regeneration asphalt mixture method for designing of the high RAP ratio that the present invention provides, can be effectively improved RAP
Aspect ratio and performance meet relevant regulations, and the mixed ratio rate of RAP can reach 36% (mass percent).This
Invention well make use of RAP material, has saved resource, it is to avoid the waste of material, is effectively reduced public affairs
The material cost that road is built, also can reduce the resource exploitation destruction to environment, the economy of this technology and ring simultaneously
Guarantor's advantage is fairly obvious.
In the present invention, the performance of regeneration asphalt is following table a, and reclaimed asphalt mixture volume mechanical index is following table
B, the performance of reclaimed asphalt mixture is following table c:
Table a
Table b
Table c
In the present invention, described RAP refers to reclaim asphalt pavement material.
Accompanying drawing explanation
Fig. 1 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute the process chart of example.
Fig. 2 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute the reclaimed asphalt mixture formate gradation composition curve of example.
Fig. 3 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute the regeneration asphalt viscosity-temperature curve of example.
Fig. 4 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the voidage graph of a relation of example.
Fig. 5 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the bulk density graph of a relation of example.
Fig. 6 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the void in mineral aggregate graph of a relation of example.
Fig. 7 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the Colophonium saturation graph of a relation of example.
Fig. 8 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the degree of stability graph of a relation of example.
Fig. 9 is a preferred reality of the method for designing of the heat regeneration asphalt mixture according to height RAP ratio of the present invention
Execute reclaimed asphalt mixture bitumen aggregate ratio and the flow valuve graph of a relation of example.
Detailed description of the invention
In order to further appreciate that the technical characteristic of the present invention, below in conjunction with specific embodiment, the present invention is carried out in detail
Carefully illustrate.Embodiment only has exemplary effect to the present invention, and does not have any restrictive effect,
The amendment of any unsubstantiality that those skilled in the art makes on the basis of the present invention, all should belong to this
The protection domain of invention.
Embodiment 1:
A kind of method for designing of the heat regeneration asphalt mixture of high RAP ratio
The present embodiment is as a example by AC-13C type Asphalt Mixture Design, specific as follows:
1.RAP crushes stepping
Carry out crushing and sieving by the RAP after road milling, carry out stepping according to size, remove particle diameter
Less than the RAP of 2.36mm, finally give 3-5mm, 5-10mm, 10-15mm third gear.During described crushing and screening
RAP material keeps dry state, and control water content in RAP material accounting for the mass percent of RAP material is 2%.
Described crushing and screening is the variability in order to reduce RAP material.
2.RAP extracts
Use full-automatic extraction device to be stripped the RAP after stepping, test the grating after each shelves RAP extracting
With aged asphalt content in each shelves RAP.According to " highway engineering Colophonium and Asphalt Mixture Experiment code " (JTG
E20-2011) in, T0726-2011 reclaims method (Abson method) recovery of Colophonium from asphalt
Its performance is also tested by aged asphalt, and result of the test is as shown in table 1,2,3, and table 1 is different-grain diameter
The RAP material of different-grain diameter corresponding percent of pass (matter under different screen sizes after the RAP material extracting of scope
Amount percentage ratio, %).
Sieve test result after table 1 RAP extracting
Table 2 RAP Asphalt Content (mass percent)
The performance of table 3 aged asphalt
3. aged asphalt regeneration
By adding regenerative agent, it is regenerated, utilize spline fit method to determine the initial additive capacity of regenerative agent, adopt
By needle penetration grading evaluation system, the effect of regeneration asphalt is evaluated, according to the regeneration effect of regeneration asphalt
Being adjusted regenerative agent dosage, the present embodiment is determined that optimal regenerative agent dosage is 10%.
3. new mineral aggregate gradation
Mineral aggregate that the new mineral aggregate that the present embodiment is used mainly has particle diameter to be 10-15mm, 5-10mm, 3-5mm and
Machine-made Sand, breeze five kinds, the gradation composition of new mineral aggregate is as shown in table 4, and table 4 is the new of different-grain diameter scope
Mineral aggregate is corresponding percent of pass (mass percent, %) under different screen sizes.
The gradation composition of the new mineral aggregate of table 4
4. gradation design determines RAP mixture proportion
Mix according to AC-13C type Colophonium in " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004)
Closing material and carry out gradation design, during design, breeze consumption general control is 4～5%, but due to RAP chats powder content
More, therefore suitably reduce breeze consumption, obtain suitable level by repeatedly adjusting each shelves RAP with virgin material ratio
Joining, finally determine that RAP admixture ratio is 36%, final gradation composition is as shown in table 5 and Fig. 2.Table 5 and figure
In 2, expression be corresponding different screen size (mm) of RAP material (mm) of different-grain diameter scope time, its
Corresponding percent of pass (mass percent, %)
The formate gradation composition of table 5 reclaimed asphalt mixture
5. determine experimental condition
The viscosity-temperature curve of test regeneration asphalt, Fig. 3 is the viscosity-temperature curve of regeneration asphalt.Viscosity be 0.17 ±
On the basis of temperature corresponding to temperature corresponding to 0.02pa.s Colophonium and 0.28 ± 0.03pa.s Colophonium, improve 10
DEG C determining mix and the forming temperature of reclaimed asphalt mixture, the mix finally determined and forming temperature are 170
DEG C and 160 DEG C.In Fig. 3: X is transverse axis, represent temperature；Y is the longitudinal axis, represents viscosity.Glutinous temperature in Fig. 3
Curve straight line equation is y=-0.010x+1.813.
6. reclaimed asphalt mixture mixes and stirs
Pour 195 DEG C of good for heating and thermal insulation new mineral aggregates (without breeze) into 170 DEG C together with 120 DEG C of RAP to mix
With pot mix 90s, make the two fully carry out heat exchange, be subsequently adding a certain amount of 160 DEG C of new Colophoniumes, make
Jointly mix and stir 90s with new mineral aggregate (without breeze), RAP, be eventually adding breeze and mix and stir 90s, complete regeneration
Mixing and stirring of asphalt.
The new Colophonium used is 70#, and its performance indications are as shown in table 6:
The performance indications of 6 No. 70 new Colophoniumes of table
7. the determination of asphalt optimum content
By initial asphalt optimum content 4.2%, carry out five groups of Marshall Tests, often five examinations of group with 0.5% interval
Part, finally measures the volume mechanical index of molding marshal piece, sees Fig. 4-9.
The asphalt optimum content finally determined is 5.2%.
8. performance verification
Under asphalt optimum content is 5.2% premise, according to preceding method mixing reclaimed asphalt mixture molding
Test specimen, respectively according in " highway engineering Colophonium and Asphalt Mixture Experiment code " (JTG E20-2011)
Regulation Progressive symmetric erythrokeratodermia is able to verify that, the results are shown in Table 6.
The performance of table 6 reclaimed asphalt mixture
Visible by table 9, designed reclaimed asphalt mixture property indices is satisfied by " highway asphalt
Pavement construction technical specification " code requirement in (JTG F40-2004), it is achieved that to high RAP ratio Colophonium
The regeneration of compound.
Embodiment 2
The method for designing of the heat regeneration asphalt mixture of a kind of high RAP ratio, sets with AC-13C regenerating mixture
It is calculated as example, including controlling the variability of RAP material, improving regenerative agent regeneration effect and determine suitably test
Condition.
In the present embodiment, the RAP material after the variability of described control RAP material includes former pavement breaking
Material carries out the step of crushing and screening, and during described crushing and screening, RAP material keeps dry state, and controls RAP material
In material, water content accounts for the mass percent of RAP material is 2%.Described crushing and screening is to reduce RAP material
Variability.
In the present embodiment, stepping is carried out according to size after the screening of described RAP material fragmentation；Described point
Shelves be divided into three class, the RAP material particle size size of described three class be respectively 3-5mm, 5-10mm,
10-15mm, the RAP material of described three class is deposited respectively.To prevent from being mutually mixed.Should remove during screening
In RAP material, particle diameter is the part of 0-2.36mm (not including 0mm), is to prevent fines to regeneration asphalt
The performance of compound impacts.Described 3-5mm includes 3mm, without 5mm；Described 5-10mm, including
5mm, without 10mm；Described 10-15mm, including 10mm, 15mm.
In the present embodiment, described raising regenerative agent regeneration effect is to use high-performance bitumen regenerant to spray
Mode is uniformly dispensed onto on the RAP material of preheating, stirs RAP material while spraying regenerative agent.Limit is sprayed
Regenerative agent limit stirring RAP material is to make regenerative agent be fully contacted with RAP material, plays the work of regenerative agent
With, improve the regeneration effect to high-performance regenerative agent.
In the present embodiment, the preheating temperature of described RAP material is 110 DEG C, and preheating time is 1.5h.
In the present embodiment, 1h, described insulation it are incubated after described RAP sprays materials high-performance bitumen regenerant
Temperature is 110 DEG C.
In the present embodiment, described raising regenerative agent regeneration effect include by test RAP material in aging
The performance of Colophonium determines the step of optimal regenerative agent dosage；The property of the aged asphalt in described test RAP material
Can be by interpolation regenerative agent, described aged asphalt to be regenerated, then use needle penetration grading evaluation system
Being evaluated the effect of regeneration asphalt, regenerative agent dosage is carried out by the regeneration effect finally according to regeneration asphalt
Adjust, determine optimal regenerative agent dosage；Described interpolation regenerative agent be utilize spline fit method to determine regenerative agent initially adds
Add dosage.
In the present embodiment, described optimal regenerative agent accounts for the mass percent of aged asphalt in RAP material is 10%.
In the present embodiment, described determine suitable experimental condition include stepping after RAP material select
Sample extraction test and the step of sieve test, by extraction test obtain in each class in RAP material aging
The performance of Colophonium and content thereof, obtain the grating of RAP material material in each class by sieve test.Logical
The grating crossing RAP material material may determine that RAP material mixture proportion in reclaimed asphalt mixture.
In the present embodiment, described extraction test is recovery aged asphalt from RAP material, and to aging drip
Blue or green performance is tested.Can be according to " highway engineering Colophonium and Asphalt Mixture Experiment code " (JTG
E20-2011) in, T0726-2011 reclaims method (Abson method) recovery of Colophonium from asphalt
Its performance is also tested by aged asphalt.
In the present embodiment, described determine suitable experimental condition include heat regeneration asphalt mixture level arrange
Meter.
In the present embodiment, during described heat regeneration asphalt mixture gradation design, breeze accounts for the gross mass gathered materials
Percentage ratio be 4%.Owing to RAP material powder content is more, therefore suitably reduce new breeze consumption, pass through
Repeatedly adjust each shelves RAP material and obtain suitable grating with virgin material ratio.
In the present embodiment, during described heat regeneration asphalt mixture gradation design, described RAP material accounts for and gathers materials
The percentage ratio of gross mass be 36%.RAP material mixture proportion is to be determined by the grating of RAP material material
's.Described gradation design is according in " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004)
AC-13C type asphalt carries out gradation design.
Described gathering materials is made up of new mineral aggregate and RAP material.For described new mineral aggregate is relative RAP material.
In the present embodiment, described determine that suitable experimental condition includes determining mixing and stirring of reclaimed asphalt mixture
Temperature and the step of forming temperature, the temperature of mixing and stirring of described reclaimed asphalt mixture is by surveying with forming temperature
The viscosity of examination regeneration asphalt and the viscosity-temperature curve of drafting regeneration asphalt determine.Described temperature of mixing and stirring refers to protect
RAP after temperature, new mineral aggregate, new Colophonium, breeze mix and stir temperature.
In the present embodiment, when described regeneration asphalt viscosity is 0.17pa.s, the temperature corresponding to viscosity-temperature curve carries
High 10 DEG C for reclaimed asphalt mixture mix and stir temperature；Described regeneration asphalt viscosity is to stick Wen Qu during 0.28pa.s
It is the forming temperature of reclaimed asphalt mixture that temperature corresponding to line improves 10 DEG C.
In the present embodiment, the temperature of mixing and stirring of described reclaimed asphalt mixture is 170 DEG C, and forming temperature is 160
℃。
In the present embodiment, described determine that suitable experimental condition includes based on initial asphalt optimum content,
It is shaped some groups of marshal pieces；Test respectively often organize the density of test specimen, voidage, Colophonium saturation,
The mechanics volume parameter such as degree of stability, flow valuve, draws density, voidage, Colophonium saturation, degree of stability, stream
Relation curve between value and asphalt content, determines asphalt optimum content；Described initial asphalt optimum content accounts for
The mass percent of reclaimed asphalt mixture is 4.2%.
In the present embodiment, described asphalt optimum content accounts for the mass percent of reclaimed asphalt mixture is 5.2%.
In the present embodiment, at asphalt optimum content compacted under reclaimed asphalt mixture, test molding respectively
High temperature anti-rut behavior, low temperature anti-cracking performance and the anti-water damage property of reclaimed asphalt mixture.When these
Index meets China existing " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) requirement, explanation
Grating and the asphalt optimum content of the heat regeneration asphalt mixture of design are reasonable.
In the present embodiment, described determine that suitable experimental condition also includes determining the new mineral aggregate of addition and design
The step of new mineral aggregate gradation；Described new mineral aggregate preheats before adding, and is incubated 4h.
In the present embodiment, the preheating temperature of described new mineral aggregate isWherein: c is new mineral aggregate
Preheating temperature, DEG C；A is RAP material preheater temperature, DEG C；B for mixing and stirring temperature, DEG C；N is RAP material
Mix and join mass ratio.
In the present embodiment, described new mineral aggregate includes that particle diameter is respectively the new of 10-15mm, 5-10mm, 3-5mm
Mineral aggregate and Machine-made Sand, breeze five kinds.
In the present embodiment, the method for designing of the heat regeneration asphalt mixture of described high RAP ratio also includes again
The step that raw asphalt mixes and stirs, the step that described reclaimed asphalt mixture mixes and stirs includes: first, will be pre-
At mix pot together with the new mineral aggregate without breeze of heat RAP material after spraying high-performance bitumen regenerant
Interior dry mixing 90s, in order to the RAP material after ensureing the new mineral aggregate without breeze and spraying high-performance bitumen regenerant
Material carries out sufficient heat exchange；Secondly, add new Colophonium, and with without the new mineral aggregate of breeze, sprinkling
RAP material after high-performance bitumen regenerant mixes and stirs 90s；It is eventually adding breeze, with the new ore deposit without breeze
RAP material, new Colophonium after material, sprinkling high-performance bitumen regenerant mix and stir 90s.
Claims (22)
1. a method for designing for the heat regeneration asphalt mixture of high RAP ratio, including controlling RAP material
Variability, improve regenerative agent regeneration effect and determine suitable experimental condition；Described determine suitably test
RAP material after condition includes stepping carries out the step of sampling extraction test and sieve test, by extracting
The performance of the aged asphalt that test obtains in each class in RAP material and content thereof, obtained by sieve test
The grating of RAP material material in each class, determines RAP material by the grating of RAP material material
Mixture proportion in heat regeneration asphalt mixture；Described determine that suitable experimental condition also includes determining addition
New mineral aggregate and design the step of new mineral aggregate gradation, described new mineral aggregate preheats before adding, and is incubated extremely
Few 4h；The preheating temperature of described new mineral aggregate is
Wherein: c is the preheating temperature of new mineral aggregate, DEG C；A is the preheating temperature of RAP material, DEG C；B is for mixing
And temperature, DEG C；N is that mixing of RAP material joins mass ratio.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 1, its
Being characterised by, the RAP material after the variability of described control RAP material includes former pavement breaking breaks
The step of broken screening, during described crushing and screening, RAP material keeps dry state, and controls in RAP material aqueous
It is less than 2% that amount accounts for the mass percent of RAP material.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 2, its
It is characterised by, after the screening of described RAP material fragmentation, carries out stepping according to size.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 3, its
Being characterised by, described stepping is divided into three class, and the RAP material particle size size of described three class is respectively
3-5mm, 5-10mm, 10-15mm, the RAP material of described three class is deposited respectively.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 1, its
Being characterised by, described raising regenerative agent regeneration effect is to use spray pattern uniform high-performance bitumen regenerant
It is dispensed onto on the RAP material of preheating, while spraying regenerative agent, stirs RAP material.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 5, its
Being characterised by, the preheating temperature of described RAP material is 110-120 DEG C, and preheating time is 1.5-2h.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 5, its
It is characterised by, is incubated 0.5～1h after described RAP sprays materials high-performance bitumen regenerant, described insulation temperature
Degree is for 110-120 DEG C.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 1, its
Being characterised by, described raising regenerative agent regeneration effect includes the property by the aged asphalt in test RAP material
Can determine that the step of optimal regenerative agent dosage, the performance of the aged asphalt in described test RAP material is to pass through
Add regenerative agent described aged asphalt is regenerated, then use needle penetration grading evaluation system to regeneration drip
Blue or green effect is evaluated, and regenerative agent dosage is adjusted, really by the regeneration effect finally according to regeneration asphalt
Fixed optimal regenerative agent dosage；Described interpolation regenerative agent is to utilize spline fit method to determine the initial additive capacity of regenerative agent.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 8, its
Being characterised by, it is 10% that described optimal regenerative agent accounts for the mass percent of aged asphalt in RAP material.
The method for designing of the heat regeneration asphalt mixture of high RAP ratio the most as claimed in claim 1, its
Being characterised by, described extraction test is recovery aged asphalt from RAP material, and the performance to aged asphalt
Test.
The method for designing of the heat regeneration asphalt mixture of 11. high RAP ratios as claimed in claim 1, its
It is characterised by, described determines that suitable experimental condition includes the gradation design of heat regeneration asphalt mixture.
The method for designing of the heat regeneration asphalt mixture of 12. high RAP ratios as claimed in claim 11, its
Being characterised by, during described heat regeneration asphalt mixture gradation design, breeze accounts for the percentage ratio of the gross mass gathered materials
It is 4～5%.
The method for designing of the heat regeneration asphalt mixture of 13. high RAP ratios as claimed in claim 11, its
Being characterised by, during described heat regeneration asphalt mixture gradation design, described RAP material accounts for the gross mass gathered materials
Percentage ratio be 36%.
The method for designing of the heat regeneration asphalt mixture of 14. high RAP ratios as claimed in claim 1, its
It is characterised by, described determines that suitable experimental condition includes determining mixing and stirring temperature and becoming of reclaimed asphalt mixture
The step of type temperature, the temperature of mixing and stirring of described reclaimed asphalt mixture is by test regeneration drip with forming temperature
The viscosity-temperature curve of blue or green viscosity and drafting regeneration asphalt determines.
The method for designing of the heat regeneration asphalt mixture of 15. high RAP ratios as claimed in claim 14,
It is characterized in that, when described regeneration asphalt viscosity is 0.17 ± 0.02pa.s, the temperature corresponding to viscosity-temperature curve improves
10 DEG C for reclaimed asphalt mixture mix and stir temperature；Glutinous temperature when described regeneration asphalt viscosity is 0.28 ± 0.03pa.s
It is the forming temperature of reclaimed asphalt mixture that temperature corresponding to curve improves 10 DEG C.
The design side of the heat regeneration asphalt mixture of the 16. high RAP ratios as described in claim 1 or 15
Method, it is characterised in that the temperature of mixing and stirring of reclaimed asphalt mixture is 170 DEG C, and forming temperature is 160 DEG C.
The method for designing of the heat regeneration asphalt mixture of 17. high RAP ratios as claimed in claim 1, its
It is characterised by, described determines that suitable experimental condition includes, based on initial asphalt optimum content, becoming
Some groups of marshal pieces of type；Test respectively and often organize the density of test specimen, voidage, Colophonium saturation, stablize
Degree, flow valuve, draw density, voidage, Colophonium saturation, degree of stability, between flow valuve and asphalt content
Relation curve, determines asphalt optimum content；Described initial asphalt optimum content accounts for the matter of reclaimed asphalt mixture
Amount percentage ratio is 4.2%.
The method for designing of the heat regeneration asphalt mixture of 18. high RAP ratios as claimed in claim 17,
It is characterized in that, it is 5.2% that described asphalt optimum content accounts for the mass percent of reclaimed asphalt mixture.
The method for designing of the heat regeneration asphalt mixture of 19. high RAP ratios as claimed in claim 18,
It is characterized in that, at asphalt optimum content compacted under reclaimed asphalt mixture, test the regeneration drip of molding respectively
High temperature anti-rut behavior, low temperature anti-cracking performance and the anti-water damage property of blue or green compound.
The method for designing of the heat regeneration asphalt mixture of 20. high RAP ratios as claimed in claim 1, its
Be characterised by, described new mineral aggregate include particle diameter be respectively 10-15mm, 5-10mm, 3-5mm mineral aggregate and
Machine-made Sand, five kinds of mineral aggregates of breeze.
The method for designing of the heat regeneration asphalt mixture of the 21. high RAP ratios as described in claim 1 or 7,
It is characterized in that, also include that the step that reclaimed asphalt mixture mixes and stirs, described reclaimed asphalt mixture are mixed and stirred
Step includes: first, after the new mineral aggregate without breeze preheated and sprinkling high-performance bitumen regenerant
RAP material dry mixing 90s in mix pot together, in order to ensure the new mineral aggregate without breeze and spray high-performance
RAP material after bitumen regenerant carries out sufficient heat exchange；Secondly, add new Colophonium, and with do not add
Add the RAP material after the new mineral aggregate of breeze, sprinkling high-performance bitumen regenerant and mix and stir 90s；It is eventually adding ore deposit
Powder, mixes with without the RAP material after the new mineral aggregate of breeze, sprinkling high-performance bitumen regenerant, new Colophonium
And 90s.
22. 1 kinds by the heat regeneration asphalt mixture of the high RAP ratio according to any one of claim 1-20
The heat regeneration asphalt mixture of high RAP ratio prepared of method for designing.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203744B (en) * | 2015-09-08 | 2018-06-19 | 中石化石油工程技术服务有限公司 | A kind of asphalt extraction test sampling method |
| CN105839497B (en) * | 2016-03-29 | 2018-01-23 | 南方高科工程技术有限公司 | A kind of cold renewal is classified substep mixing method |
| CN107299575B (en) * | 2017-08-15 | 2019-08-23 | 周海娟 | A kind of production method of high dense asphalt concrete MAC of the voidage less than 3% |
| CN107884555B (en) * | 2017-11-08 | 2020-02-07 | 长安大学 | RAP grading inspection method for cold-recycling asphalt mixture |
| CN110540383A (en) * | 2018-05-29 | 2019-12-06 | 江苏一诺路桥工程检测有限公司 | Regenerated asphalt mortar and method for preparing asphalt mixture by using same |
| CN108951347A (en) * | 2018-07-18 | 2018-12-07 | 北京建筑大学 | The design method of heated tool butt-welding asphalt under a kind of high RAP volume |
| CN108996932B (en) * | 2018-08-15 | 2021-01-01 | 合肥孚成活性材料技术开发有限公司 | Plant-mixed hot recycling grading design method for asphalt pavement reclaimed materials |
| CN109400009A (en) * | 2018-11-08 | 2019-03-01 | 重庆市智翔铺道技术工程有限公司 | Remelting casting type heat regeneration asphalt mixture and preparation method thereof |
| CN111087198B (en) * | 2019-12-31 | 2022-10-25 | 六安市共鑫道路材料有限公司 | Preparation method of recycled asphalt mixture |
| CN113173736B (en) * | 2021-03-26 | 2022-04-01 | 东南大学 | Preparation method of high-mixing-amount plant-mixed hot recycled asphalt mixture |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1757828A (en) * | 2004-10-09 | 2006-04-12 | 深圳市海川实业股份有限公司 | Cooling regeneration method of asphalt added with foam asphalt |
| CN1894470A (en) * | 2003-12-18 | 2007-01-10 | 西姆材料公司 | Method for reconstructing a bituminous-surfaced pavement |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN102493316A (en) * | 2011-12-07 | 2012-06-13 | 广东省长大公路工程有限公司 | Production method of plant-mixed cold recycling foamed asphalt concrete |
| CN102733291A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Regeneration method of asphalt mixture modifier for absorbing automobile exhaust |
| CN103556560A (en) * | 2013-10-29 | 2014-02-05 | 云南省公路科学技术研究院 | Preparation method of high-performance warm-mix regenerated asphalt mixture |
-
2014
- 2014-08-18 CN CN201410406713.8A patent/CN104164817B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1894470A (en) * | 2003-12-18 | 2007-01-10 | 西姆材料公司 | Method for reconstructing a bituminous-surfaced pavement |
| CN1757828A (en) * | 2004-10-09 | 2006-04-12 | 深圳市海川实业股份有限公司 | Cooling regeneration method of asphalt added with foam asphalt |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN102493316A (en) * | 2011-12-07 | 2012-06-13 | 广东省长大公路工程有限公司 | Production method of plant-mixed cold recycling foamed asphalt concrete |
| CN102733291A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Regeneration method of asphalt mixture modifier for absorbing automobile exhaust |
| CN103556560A (en) * | 2013-10-29 | 2014-02-05 | 云南省公路科学技术研究院 | Preparation method of high-performance warm-mix regenerated asphalt mixture |
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