CN105948813A - Foamed warm-mix recycled asphalt mixture and preparation method thereof - Google Patents
Foamed warm-mix recycled asphalt mixture and preparation method thereof Download PDFInfo
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- CN105948813A CN105948813A CN201610272166.8A CN201610272166A CN105948813A CN 105948813 A CN105948813 A CN 105948813A CN 201610272166 A CN201610272166 A CN 201610272166A CN 105948813 A CN105948813 A CN 105948813A
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- Prior art keywords
- asphalt mixture
- recycled asphalt
- rap
- warm
- foam
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a foamed warm-mix recycled asphalt mixture and a preparation method thereof. The recycled asphalt mixture comprises the following components: 0.5 to 4% of foamed asphalt, 13 to 65% of a RAP material, 30 to 80% of a new aggregate and 0 to 3% of mineral powder. The preparation method comprises the following steps: weighing raw materials according to a weight percentage, respectively mixing the RAP material and the new aggregate, adding the foamed asphalt and carrying out mixing, and adding the mineral powder and carrying out mixing so as to prepare the recycled asphalt mixture. The recycled asphalt mixture prepared by using the method provided by the invention has the following advantages: the content of the RAP material in the recycled asphalt mixture is high, so the utilization rate of the RAP material is enlarged, and high-temperature stability of the mixture is improved; meanwhile, a foaming warm-mix technology and a hot-plant-mix recycling technology are organically combined in the invention, so ageing of the asphalt mixture in the processes of production and construction is reduced, and the service life of pavement is prolonged.
Description
Technical field
The invention belongs to reclaimed asphalt mixture field, particularly relate to a kind of foam warm-mixed recycled asphalt mixture and
Its preparation method.
Background technology
Along with the development of human society, the exhaustion of the energy and the deterioration of environment become pendulum in face of the mankind
Serious threat, develops a circular economy, walks sustainable development path, energy-saving and emission-reduction are increasingly subject to people's attention.
Regeneration to old bitumen pavement material is that highway industry fulfils recycling of resource conscientiously, walks sustainable development
The Important Action of exhibition road.Hot plant mix reclamation technology is the asphalt pavement material being most widely used in the world at present
Renovation process, is the technology of a kind of maturation, and due to it, to there is RAP stock utilization relatively low, generally only has
10%～20%, therefore, the proportion of utilization of RAP material to be improved, then cannot protect according to the current mode of production
The bulk temperature of card regenerating mixture, and the compacting of on-the-spot compound is the most difficult.
Warm mix technology can reduce construction temperature 30～50 DEG C, saves the energy of 30%, can significantly subtract simultaneously
Few CO2、SO2And NOXDischarge Deng gas；And the mix that significantly reduces compound due to it and construction
Temperature, so that the plant-mix heat recycle technology of high RAP volume is possibly realized, at present without any additive
Foam warm mix technology have become as the main flow of U.S.'s warm mix technology；Additionally, warm mix technology makes compound exist
120～140 DEG C of mixs are uniform, thus reduce bituminous cements and produce and aging in construction at compound, prolong
Grow the life-span of bituminous paving；Meanwhile, high RAP volume can improve the hard of regenerating mixture medium pitch cementitious matter
Degree, improves the high-temperature stability of regenerating mixture.
Summary of the invention
Goal of the invention: the first object of the present invention is to provide the foam warm mix regeneration of a kind of high RAP material volume
Asphalt；The second object of the present invention is to provide the preparation method of this reclaimed asphalt mixture.
Technical scheme: the foam warm-mixed recycled asphalt mixture of the present invention includes following component by weight percentage:
Foamed asphalt 0.5～4%, RAP material 13～65%, newly gather materials 30～80% and breeze 0～3%.
In the reclaimed asphalt mixture that the present invention prepares, RAP material content is high, not only increases RAP material
Utilization rate, and the high temperature stability performance of this compound is improved, it is preferred that foamed asphalt 2～3%, RAP
Material 45～50%, newly gather materials 45～50% and breeze 1～2%, newly gather materials and include limestone aggregates, basalt collection
Material or slag as aggregate.
Furtherly, the preparation method of foamed asphalt of the present invention comprises the steps: to be heated to matrix pitch
After 140～160 DEG C, add its 1.3～1.8% Water blown of mass,；Preferably, this foamed asphalt is swollen
Swollen rate is 10～20, and the half-life is 8～25s.
Furtherly, the RAP material recovery that the present invention uses is in the road surface of practical 8～10 years, its nominal grain
Footpath≤19.5mm, milling speed is 6～8m/min.
The present invention prepares the method for foam warm-mixed recycled asphalt mixture and comprises the steps:
(1) each raw material is weighed by weight percentage, according to particle diameter 9.5mm, RAP material is divided into slightly,
Fine aggregate；
Drip due in the RAP material bitumen aggregate ratio, grating and the RAP that obtain in the Jiu Lu section of the different lengths of service
Blue or green degree of aging is not consistent even exists bigger difference, is unfavorable for regenerating mixture grating and bitumen aggregate ratio
Control.The RAP grating that old pavement milling material obtains under different milling speed also differs, can be to regeneration drip
The serviceability of blue or green compound impacts, and thick for the division of RAP material, fine aggregate can be obtained stable level
Join.
(2) will warm up the RAP material of 100～130 DEG C respectively and be heated to 100～130 DEG C of new aggregate blendings
After 60～90s, it is heated to the foamed asphalt of 110～130 DEG C, mix 60～90s, is eventually adding breeze and mixes
Close 60～90s, i.e. prepare reclaimed asphalt mixture.
Beneficial effect: compared with prior art, the remarkable advantage of the present invention is: the reclaimed asphalt mixture prepared
Middle RAP material content is high, not only increases the utilization rate of RAP material, and makes the high temperature of this compound steady
Qualitative energy improves；Additionally, foam warm mix technology is organically combined by the present invention with hot plant mix reclamation technology, reduce
Asphalt produce, construction link aging, extend pavement life；Can be greatly reduced simultaneously
CO2、SO2、NOXDischarge Deng gas；Additionally, increase sharply in Current Highway construction and maintenance quantity
Under situation, this reclaimed asphalt mixture is applied in road engineering, creates huge economic benefit and society
Benefit.
Accompanying drawing explanation
Fig. 1 is the compound K1 value under different RAP volume；
Fig. 2 is the compound CEI value under different RAP volume；
Fig. 3 is that porosity is with RAP volume change curve.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described further.
The RAP material recovery that the present invention uses is in the use road surface of 8～10 years, and its nominal maximum aggregate size is
19.5mm, milling speed is 6～8m/min.
Embodiment 1
Raw material forms: the foamed asphalt of 3%, the RAP material of 20%, the limestone aggregates of 76% and 1%
Breeze.
Preparation method comprises the steps:
(1) matrix pitch is heated to 145 DEG C, the water of addition 1.5% this matrix pitch, water temperature 30 DEG C,
Foaming in foaming machine, prepare foamed asphalt, wherein, the expansion rate of this foamed asphalt is 15, and the half-life is 16.8s；
(2) being classified by RAP material, the particle diameter RAP material more than 9.5mm is as RAP rough set
Material, the particle diameter RAP material less than 9.5mm is as RAP fine aggregate, thereafter, is heated by this RAP material
To 110 DEG C, limestone aggregates is heated to 130 DEG C, and foamed asphalt is heated to 130 DEG C, by limestone aggregates with
RAP material is sufficiently stirred for, mix about 90s, adds foamed asphalt mix 90s, is eventually adding breeze mix again
90s, can be prepared by foamed asphalt and uniformly wraps the reclaimed asphalt mixture in RAP material and surface of aggregate.Its
In, RAP material recovery is in using the road surface of 8 years, and milling speed is 6m/min, and described RAP material is
Big nominal particle diameter is 19.5mm.
Embodiment 2
Preparation method is same as in Example 1, and difference is that raw material consists of: the foamed asphalt of 2%, 30%
RAP material, the limestone aggregates of 66% and the breeze of 2%.
Embodiment 3
Preparation method is same as in Example 1, and difference is that raw material consists of: the foamed asphalt of 1.5%, 40%
RAP material, the limestone aggregates of 57% and the breeze of 1.5%.
Embodiment 4
Preparation method is same as in Example 1, and difference is that raw material consists of: the foamed asphalt of 2.5%, 50%
RAP material, the limestone aggregates of 46% and the breeze of 1.5%.
Foam warm-mixed recycled asphalt mixture embodiment 1 to 4 prepared, uses gyratory compaction molding examination
Part, compactingproperties parameter value and compound porosity are as shown in table 1, Fig. 1, Fig. 2 and Fig. 3.Wherein, K1
For Nmin-NdesBetween degree of compaction slope on semilog diagram, K2 be Ndes-NmaxBetween closely knit on semilog diagram
Spend slope, CEI is compaction energy index, TDI is construction energy index.
Compound compactingproperties parameter value under table 1 embodiment 1-4 difference RAP volume
Understand in conjunction with table 1, Fig. 1 and Fig. 2, under identical forming temperature, along with the increase of RAP volume,
K1 is gradually reduced, and CEI increases, and shows that the compound rammability in the construction stage is with the increase of RAP volume
And reduce.Trace it to its cause and mainly have following two aspects:
On the one hand, along with the raising of RAP volume, the foam that is newly added in foam temperature reclaimed asphalt mixture drips
Blue or green content is gradually reduced, and the workability of compound reduces；The raising of RAP volume causes carrying of cementitious matter viscosity
Height, thus cause compound compacting more and more difficult；Along with the raising of RAP volume, the heating temperature newly gathered materials
Degree improves the most therewith, causes ageing of asphalt degree to increase the weight of, and the viscosity also resulting in Colophonium improves and mobility reduction；
On the other hand, along with the increase of RAP volume, regenerating mixture is newly added Colophonium and reduces therewith, and
The water content being newly added in foamed asphalt increases, in limited duration of mixing, and the foaming water being newly added in Colophonium
May not necessarily migrate in time, in the aged asphalt of RAP material, affect foam warm mix effect, and then affect foam temperature
The construction workability of regenerating mixture and compaction capacity, this is also the reason causing compound to become to be increasingly difficult to pressure
One of.
And analyzed by Fig. 3 porosity index, the porosity of compound also with RAP material volume increase and
Increase, but the reclaimed asphalt mixture for preparing of embodiment 1 to embodiment 4 porosity all reached specification and wanted
Ask.
By embodiment 1-4 prepare foam warm-mixed recycled asphalt mixture carry out performance detection, it is thus achieved that result such as
Shown in table 2.
Table 2 recycling asphalt mixtures performance synopsis
As shown in Table 2, along with the lifting of RAP volume, the performance of prepared reclaimed asphalt mixture all meets
Performance indications, it follows that the reclaimed asphalt mixture that the raw material of present invention employing and preparation method prepare is being protected
While card performance requirement, the RAP volume that improve.
Embodiment 5
Designing 7 groups of parallel tests, basic step is same as in Example 1, and difference is that the component of raw material contains
Amount, is respectively as follows:
1, foamed asphalt 4.5%, RAP material 67%, basalt aggregate 25% and breeze 3.5%；
2, foamed asphalt 4%, RAP material 65%, basalt aggregate 30% and breeze 1%；
3, foamed asphalt 2%, RAP material 50%, basalt aggregate 45% and breeze 3%；
4, foamed asphalt 3%, RAP material 45%, basalt aggregate 50% and breeze 2%；
5, foamed asphalt 4%, RAP material 13%, basalt aggregate 80% and breeze 3%；
6, foamed asphalt 0.5%, RAP material 45% and basalt aggregate 54.5%；
7, foamed asphalt 0.3%, RAP material 12%, basalt aggregate 83% and breeze 4.7%；
Respectively above-mentioned prepared reclaimed asphalt mixture is carried out performance detection, it is thus achieved that result as shown in table 3.
The performance synopsis of table 3 reclaimed asphalt mixture
As shown in Table 3, the performance of the foam warm-mixed recycled asphalt mixture that the 2 to 6th group prepares all meets performance
Technology requirement, due to, the highest viscosity that can improve cementitious matter of RAP volume, reduce being compacted of compound
Property, the voidage of compound is relatively big, and mixture performance is relatively low, and uses raw material components and the content of the present invention,
Enable to reclaimed asphalt mixture on the basis of meeting performance requirement, improve the volume of RAP, increase RAP
The utilization rate of material.
Embodiment 6
Raw material forms: the foamed asphalt of 3%, the RAP material of 20%, the basalt aggregate of 76% and 1%
Breeze.
Preparation method comprises the steps:
(1) matrix pitch is heated to 140 DEG C, the water of addition 1.8% this matrix pitch, water temperature 30 DEG C,
Foaming in foaming machine, prepare foamed asphalt, wherein, the expansion rate of this foamed asphalt is 20, and the half-life is 8s；
(2) being classified by RAP material, the particle diameter RAP material more than 9.5mm is as RAP rough set
Material, the particle diameter RAP material less than 9.5mm is as RAP fine aggregate, thereafter, is heated by this RAP material
To 100 DEG C, basalt aggregate is heated to 130 DEG C, and foamed asphalt is heated to 110 DEG C, by basalt aggregate with
RAP material is sufficiently stirred for, mix about 60s, adds foamed asphalt mix 60s, is eventually adding breeze mix again
60s, can be prepared by foamed asphalt and uniformly wraps the reclaimed asphalt mixture in RAP material and surface of aggregate.Its
In, RAP material recovery is in the use road surface of 10 years, and milling speed is 8m/min, described RAP material
Nominal maximum aggregate size is 19.5mm.
Embodiment 7
Raw material forms: the foamed asphalt of 3%, the RAP material of 20%, the slag as aggregate of 76% and the ore deposit of 1%
Powder.
Preparation method comprises the steps:
(1) matrix pitch is heated to 160 DEG C, the water of addition 1.3% this matrix pitch, water temperature 30 DEG C,
Foaming in foaming machine, prepare foamed asphalt, wherein, the expansion rate of this foamed asphalt is 10, and the half-life is 25s；
(2) being classified by RAP material, the particle diameter RAP material more than 9.5mm is as RAP rough set
Material, the particle diameter RAP material less than 9.5mm is as RAP fine aggregate, thereafter, is heated by this RAP material
To 130 DEG C, slag as aggregate is heated to 100 DEG C, and foamed asphalt is heated to 130 DEG C, by slag as aggregate and RAP
Material is sufficiently stirred for, mix about 60s, adds foamed asphalt mix 60s, is eventually adding breeze mix 60s again,
Can be prepared by foamed asphalt and uniformly wrap the reclaimed asphalt mixture in RAP material and surface of aggregate.Wherein,
RAP material recovery is in the use road surface of 10 years, and milling speed is 8m/min, the maximum of described RAP material
Nominal particle diameter is 19.5mm.
The performance of the foam warm-mixed recycled asphalt mixture that embodiment 6-7 prepares all meets technology requirement.
Claims (10)
1. a foam warm-mixed recycled asphalt mixture, it is characterised in that include following component by weight percentage:
Foamed asphalt 0.5～4%, RAP material 13～65%, newly gather materials 30～80% and breeze 0～3%.
Foam warm-mixed recycled asphalt mixture the most according to claim 1, it is characterised in that: described bubble
Foam Colophonium 2～3%, RAP material 45～50%, newly gather materials 45～50% and breeze 1～2%.
Foam warm-mixed recycled asphalt mixture the most according to claim 1 and 2, it is characterised in that: institute
Stating newly gathers materials includes limestone aggregates, basalt aggregate or slag as aggregate.
A kind of foam warm-mixed recycled asphalt mixture the most according to claim 1 and 2, it is characterised in that:
After the preparation method of described foamed asphalt comprises the steps: matrix pitch is heated to 140～160 DEG C, add
Its 1.3～1.8% Water blown of mass, to obtain final product.
Foam warm-mixed recycled asphalt mixture the most according to claim 3, it is characterised in that: described bubble
The expansion rate of foam Colophonium is 10～20.
Foam warm-mixed recycled asphalt mixture the most according to claim 5, it is characterised in that: described bubble
The half-life of foam Colophonium is 8～25s.
A kind of foam warm-mixed recycled asphalt mixture the most according to claim 1 and 2, it is characterised in that:
Described RAP material recovery was in the road surface of practical 8～10 years.
A kind of foam warm-mixed recycled asphalt mixture the most according to claim 7, it is characterised in that: institute
The milling speed stating RAP material is 6～8m/min.
A kind of foam warm-mixed recycled asphalt mixture the most according to claim 7, it is characterised in that: institute
State the nominal particle diameter≤19.5mm of RAP material.
10. the method preparing foam warm-mixed recycled asphalt mixture described in claim 1, its feature exists
In comprising the steps:
(1) each raw material is weighed by weight percentage, according to particle diameter 9.5mm, RAP material is divided into slightly,
Fine aggregate；
(2) will warm up the RAP material of 100～130 DEG C respectively and be heated to 100～130 DEG C of new aggregate blendings
After 60～90s, it is heated to the foamed asphalt of 110～130 DEG C, mix 60～90s, is eventually adding breeze and mixes
Close 60～90s, i.e. prepare reclaimed asphalt mixture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610272166.8A CN105948813A (en) | 2016-04-28 | 2016-04-28 | Foamed warm-mix recycled asphalt mixture and preparation method thereof |
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| CN201610272166.8A CN105948813A (en) | 2016-04-28 | 2016-04-28 | Foamed warm-mix recycled asphalt mixture and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106988188A (en) * | 2017-05-18 | 2017-07-28 | 江苏道润工程技术有限公司 | The construction method and construction system of cold in place recycling |
| CN108046663A (en) * | 2017-12-15 | 2018-05-18 | 武汉工程大学 | One kind mixes slag Recycled Asphalt Pavement and preparation method thereof |
| CN110424219A (en) * | 2019-08-10 | 2019-11-08 | 深圳市市政工程总公司 | The stirring preparation method of foam warm-mix bitumen mixture |
| CN110981288A (en) * | 2019-12-31 | 2020-04-10 | 沧州市市政工程股份有限公司 | Preparation method of waste edible oil warm recycled asphalt mixture |
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| CN108046663A (en) * | 2017-12-15 | 2018-05-18 | 武汉工程大学 | One kind mixes slag Recycled Asphalt Pavement and preparation method thereof |
| CN108046663B (en) * | 2017-12-15 | 2020-10-23 | 武汉工程大学 | Steel slag-doped recycled asphalt concrete and preparation method thereof |
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| CN110981288A (en) * | 2019-12-31 | 2020-04-10 | 沧州市市政工程股份有限公司 | Preparation method of waste edible oil warm recycled asphalt mixture |
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