CN108046663A - One kind mixes slag Recycled Asphalt Pavement and preparation method thereof - Google Patents
One kind mixes slag Recycled Asphalt Pavement and preparation method thereof Download PDFInfo
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- CN108046663A CN108046663A CN201711349397.5A CN201711349397A CN108046663A CN 108046663 A CN108046663 A CN 108046663A CN 201711349397 A CN201711349397 A CN 201711349397A CN 108046663 A CN108046663 A CN 108046663A
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- slag
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- asphalt pavement
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00198—Characterisation or quantities of the compositions or their ingredients expressed as mathematical formulae or equations
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- Engineering & Computer Science (AREA)
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- Road Paving Structures (AREA)
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Abstract
The present invention relates to one kind to mix slag Recycled Asphalt Pavement, is made of following raw materials according：Slag, discarded bituminous concrete, aging-resisting type regenerative agent, miberal powder and new pitch；Aging-resisting type regenerative agent includes base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber and stabilizer；Base oil includes industry oil and epoxidized soybean oil；The compatibilizing aid includes wax-crystal dispersing auxiliary and low temperature fluidity improver.A kind of preparation method for mixing slag Recycled Asphalt Pavement, specifically comprises the following steps：Slag is heated, discards bituminous concrete heating, new pitch heating；After will warm up the slag of set point of temperature and the mixing of discarded bituminous concrete, the new pitch of set point of temperature is heated to, aging-resisting type regenerative agent is added, is eventually adding miberal powder, is made and mixes slag Recycled Asphalt Pavement.Beneficial effects of the present invention are：The high-temperature behavior of finished product, endurance quality, water stabilizing resist secondary ageing properties excellent.
Description
Technical field
The present invention relates to highway engineering technical fields more particularly to one kind to mix slag Recycled Asphalt Pavement and its preparation side
Method.
Background technology
With the development of China's infrastructure, highway in China traffic total kilometrage has occupied the first in the world.It is 5 to 10 years following,
Ground surface material based on bituminous concrete will also progressively reach service life, and China will enter a road maintenance and conserve, turn over
The peak of reconstruction is repaiied, largely discarded bituminous concrete (RAP) will be generated at that time, develops the highly efficient regeneration of discarded bituminous concrete
Current research hotspot is become using technology.On the other hand, China is that steel produces the first big country, the by-product of steel-making ---
The annual discharge capacity of slag has been more than 100,000,000 tons or more, and current comprehensive utilization ratio is very low.In general, pass through conjunction
The slag of suitable technological forming, geometry is similar with the natural rubble that crushes with mechanical property, and have hard, rough surface and
The features such as wear-resisting, possesses the potential for becoming high-quality asphalt mixture instead of natural stone and gathering materials.Therefore, how by slag apply with
Road engineering, it is also current research hotspot to realize that the high consumption rate of slag utilizes.
Current research has been realized in the preparation and application of Recycled Asphalt Pavement and steel slag asphalt concrete.Its technology
Measure is respectively：For Recycled Asphalt Pavement, be by RAP with newly gathering materials, the materials such as new pitch and regenerative agent mix and mix
System, is prepared into the bituminous concrete with asphalt concrete similar nature, technological difficulties are that can the performance of regenerative agent
Can the comprehensive performance for recovering aged asphalt and regenerative agent compatible with the good infiltration of aged asphalt；It is mixed for steel slag asphalt
It is that slag is prepared into the concrete for meeting Pavement Condition requirement with newly gathering materials and pitch etc. mixes mixing for solidifying soil
Material, technological difficulties are the aggregate grading design of mixture, bitumen content design and maximum theory density calculating etc..
Recycled Asphalt Pavement and steel slag asphalt concrete mix in preparation process although discarded pitch can be consumed significantly
Solidifying soil and these discarded objects of slag, but still part can be used newly to gather materials (20%-70%) in production.Therefore how will be useless
It abandons bituminous concrete and slag combines and prepares bituminous concrete, avoid or as far as possible few use is newly gathered materials, it can be effective
Reduction cut into a mountain fried stone, playing the role of preserving the ecological environment to a certain degree, and during constructing road, largely using work
Industry discarded object, economic and social benefit are also significant.
But discarded bituminous concrete and prepared from steel slag are utilized for bituminous concrete and simple Recycled Asphalt Pavement and steel
The technology of preparing of slag bituminous concrete is compared, and there is problems：1st, the heat conductivility of slag more commonly gathers materials, identical
Solar irradiation under the conditions of, requirement higher of the asphalt concrete structure layer for high temperature resistance, this characteristic is also to regenerative agent
Performance propose higher requirement, the use that existing regenerative agent can not meet in the Recycled Asphalt Pavement for mixing slag will
It asks.The water absorption rate of 2 slags is high, and during mixing, regenerative agent is easy to be adsorbed by slag, can not well melt with aged asphalt
With regenerative agent is made not acted to aged asphalt effectively.3rd, slag is much hard compared with the material of discarded bituminous concrete,
Suitable grading form should be used, avoid it is discarded skeleton is formed between bituminous concrete and slag, cause concrete structure steady
Qualitative difference.Problem above largely constrains the application for the Recycled Asphalt Pavement for mixing slag.
The content of the invention
The technical problems to be solved by the invention are to provide one kind and mix slag Recycled Asphalt Pavement and preparation method thereof, with
Overcome above-mentioned deficiency of the prior art.
The technical solution that the present invention solves above-mentioned technical problem is as follows：One kind mixes slag Recycled Asphalt Pavement, by following
Raw material is made：Slag, discarded bituminous concrete, aging-resisting type regenerative agent, miberal powder and new pitch；The aging-resisting type regenerative agent by
Following raw materials according is made：Base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber and stabilizer；The basis
Oil is made of following raw materials according：Industry oil and epoxidized soybean oil；The compatibilizing aid is made of following raw materials according：Wax-crystal dispersing auxiliary and
Low temperature fluidity improver.
Further, the slag, discarded bituminous concrete, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：
Wherein, ρF1For slag stamped density, ρFFor slag apparent density, ρA1For discarded bituminous concrete stamped density, ρAIt is useless
Abandon bituminous concrete apparent density, ρkFor miberal powder density, the value of coefficient Y is 0.01-0.03.
Further, the base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber, the matter of stabilizer
Amount is than being 100：(10-20)：(0.5-2)：(1-80)：(0.5-1)：(0.1-0.5), the alkylation antioxidant are alkylation two
Aniline antioxidant, the light absorber are ultraviolet absorbent UV-531, and the SBS modifier is linear SBS modifier, modified
Agent stabilizer is cumyl peroxide.
Further, the mass ratio of the industry oil and epoxidized soybean oil is (60-80)：(40-20), the industry oil are to urge
Change cracked diesel oil, the epoxidized soybean oil epoxide number is 6.8%.
Further, the mass ratio of the wax-crystal dispersing auxiliary and low temperature fluidity improver is (0.5-1):(10-20), it is described
Wax-crystal dispersing auxiliary is microwax, and fusing point is 100 DEG C -105 DEG C, and the low temperature fluidity improver is ethylene-vinyl acetate
Analog copolymer.
The beneficial effects of the invention are as follows：
1) high-temperature behavior of finished product, endurance quality, water stabilizing resist secondary ageing properties excellent, successfully by slag
It has applied in the preparation of Recycled Asphalt Pavement, such bituminous concrete gathers materials and is all made of trade waste, is added without
New building stones, and have excellent performance, meet the requirement on high road surface, weight can be provided for the Treating technology of China's solid waste
The technical support wanted；
2) aromatised fraction for the base oil that aging-resisting type regenerative agent uses is high, can rebuild the balance of pitch each component, system
Compatibilizing aid enable to allow industry oil used in aging-resisting type regenerative agent and epoxidized soybean oil, SBS modifier, alkane
Base antioxidant, light absorber compatibility greatly improve, and add stabilizer by SBS modifier and industry oil and epoxy soybean
Oil is stablized scattered；
3) wax crystal dispersing agent can be nucleated and eutectic acts on, and wax crystalline substance is dispersed into smaller particle, helping to improve pitch can
Plasticity and non-deformability so that aging-resisting type regenerative agent is anti-aging and every ability improves, and height so excellent in compatibility is steady
Determine the aging-resisting type regenerative agent of system can meet significantly slag incorporation after mixture for regenerative agent high request.
A kind of preparation method for mixing slag Recycled Asphalt Pavement, specifically comprises the following steps：
S100, slag is heated to 180-210 DEG C, discarded bituminous concrete is heated to 120-150 DEG C, and new pitch is heated to
It is 160-170 DEG C, spare；
After 60-90s is mixed in S200, the slag that will warm up set point of temperature and discarded bituminous concrete, heating is added in
To the new pitch of set point of temperature, 60-90s is stirred, adds aging-resisting type regenerative agent, 60-90s is stirred, is eventually adding miberal powder, stirs
60-90s is mixed, is made and mixes slag Recycled Asphalt Pavement.
Further, in the S100, the grain size of slag is more than 4.8mm-5.2mm, and the grain size of discarded bituminous concrete is less than
4.8mm-5.2mm。
Further, the crush values of the slag are less than or equal to 24%, and Los Angeles wearing valve is less than or equal to 24%, and water absorption rate is small
In equal to 3%.
Further, the discarded bituminous concrete is to handle the discarded pitch obtained by special equipment to old asphalt pavement
Concrete material.
Further, the new pitch is No. 70 asphalt or I-D modified pitch.
Further, in the S200, the specific preparation process of base oil is as follows：Industry oil and epoxidized soybean oil are pressed into (60-
80)：The mass ratio mixing of (40-20), controlling water bath heating temperature, heating water bath stirring 2h-3h obtains base for 60 DEG C -80 DEG C
Plinth oil.
Further, in the S200, the specific preparation process of compatibilizing aid is as follows：By wax-crystal dispersing auxiliary and low temperature flow
Modifying agent presses (0.5-1):The mass ratio mixing of (10-20), controlling bath temperature, heating water bath stirs for 115 DEG C -130 DEG C
0.5h-1h obtains compatibilizing aid.
Further, in the S200, the specific preparation process of aging-resisting type regenerative agent is as follows：First by base oil, compatible help
Agent, alkylation antioxidant, SBS modifier, light absorber and stabilizer are sheared with high-speed shearing machine, shear temperature for 140 DEG C-
160 DEG C, then at 120 DEG C -130 DEG C of baking oven inside holding 1h-2h, heat preservation, which is placed under normal temperature condition, to be cooled to room temperature, and is obtained resistance to
Aging type regenerative agent.
Further, base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber and stabilizer are at a high speed
The time sheared in cutter is 20min-50min, and the rotating speed of cutter is 6000r/min-10000r/min.
Further, the miberal powder obtains for lime stone grinding, 0.075mm sieve pore percent of pass 80%-95%.
It is further had the beneficial effect that using above-mentioned：Using new design method so that gather materials in a manner of suitable grading
It is mixed so that steel slag instead RAP forms new skeleton, improves the stability of structure.During mixing, using first plus
Pitch, the rear method for adding in regenerative agent avoid the problem of regenerative agent is excessively adsorbed that its efficiency can not be played by slag；Separately
The oil-soluble of antioxidant is greatly improved in outer alkylated diphenylamine antioxidant used unlike general antioxidant.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment one：
1st, slag and (discarded bituminous concrete) RAP classifications processing；
Slag is placed in the sieve of 4.8mm, carry out vibrations sieving a, takes the slag on sieve spare；
RAP is placed in the sieve of 4.8mm, carry out vibrations sieving b, takes the RAP under sieve spare.
2nd, the preparation of aging-resisting type regenerative agent
A, by industry oil and epoxidized soybean oil according to 60：40 ratio mixing, it is 60 DEG C to control water bath heating temperature, water-bath
Heating stirring 2h, obtains base oil；
B, by wax-crystal dispersing auxiliary and low temperature fluidity improver according to 0.5:20, controlling bath temperature, water-bath adds for 115 DEG C
Thermal agitation 0.5h, obtains compatibilizing aid；
C, by gained base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber, stabilizer according to
100：10：2：1：1：0.1 ratio mixing addition shears 20min with high-speed shearing machine, and cutter rotating speed is 6000 turns/min, is cut
Temperature is cut as 140 DEG C, then at 120 DEG C of baking oven inside holding 1h, heat preservation, which is placed under normal temperature condition, to be cooled to room temperature, and is obtained resistance to old
Change type regenerative agent.
3rd, mix-design
It mixes slag Recycled Asphalt Pavement to be made of slag, RAP, miberal powder, new pitch, aging-resisting type regenerative agent, ratio
Design process is as follows：
A, obtained slag will be screened to be placed in the capacity bucket of 10L, measures its stamped density ρF1For 2.08g.cm3, steel
The apparent density of slag is ρFFor 3.20g.cm3；
B, obtained RAP will be screened to be placed in the capacity tube of 5L, measures its stamped density ρA1For 2.18g.cm3, RAP's
Apparent density is ρAFor 2.5g.cm3；ρkIt is 2.68g.cm for miberal powder density3。
C, the quality m of slagFFor 100, then the dosage m of RAPAFor 17.6, the m of miberal powderkQuality is 7.2；
D, the quality m of aging-resisting type regenerative agentcFor the dosage m of RAPA5%, quality 0.88；
E, the quality m of new pitchbFor (mF+mA+mk) Y, coefficient Y value be 0.03, mbFor 3.7.
By above step, determine that slag, RAP, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：100：
17.6：7.2:3.7:0.88.
4th, the mixing of mixture
A, it is 100 in mass ratio：17.6：7.2:3.7:0.88 ratio weighs slag, RAP, miberal powder, new pitch, resistance to old
Change type regenerative agent, it is spare；
B, slag is heated to 180 DEG C, RAP is heated to 150 DEG C, and new pitch is heated to 160 DEG C；
C, after will warm up the slag of set point of temperature and RAP mixings 60s, it is heated to the new drip of set point of temperature
Green grass or young crops stirs 60s, adds aging-resisting type regenerative agent, stirs 60s, is eventually adding miberal powder, stirs 60s, is made and mixes slag regeneration drip
Blue or green concrete.
The slag is the byproduct of steel-making, and for crush values less than or equal to 24%, Los Angeles wearing valve is less than or equal to 24%,
Water absorption rate is less than or equal to 3%, and the RAP is to handle the discarded bituminous concrete material obtained by special equipment to old asphalt pavement
Material.The industry oil is catalytic cracking diesel oil, and the epoxidized soybean oil epoxide number is 6.8%, and the wax-crystal dispersing auxiliary is micro-
Brilliant wax, fusing point are 100 DEG C -105 DEG C, and the low temperature flow agent is ethylene-vinyl acetate analog copolymer.The antioxidant is alkane
Base diphenylamines antioxidant, the light absorber are ultraviolet absorbent UV-531.The SBS modifier is modified for linear SBS
Agent, the stabilizer are cumyl peroxide.The miberal powder obtains for lime stone grinding, 0.075mm sieve pore percent of pass 80%-
95%.The new pitch is No. 70 asphalt or I-D modified pitch.
Embodiment 2：
1st, slag and RAP classifications processing.
Slag is placed in the sieve of 5mm, carry out vibrations sieving a, takes the slag on sieve spare；
RAP is placed in the sieve of 5mm, carry out vibrations sieving B, takes the RAP under sieve spare.
2nd, the preparation of aging-resisting type regenerative agent
A, by industry oil and epoxidized soybean oil according to 65：35 ratio mixing, it is 70 DEG C to control water bath heating temperature, water-bath
Heating stirring 2h, obtains base oil；
B, by wax-crystal dispersing auxiliary and low temperature fluidity improver according to 0.7:19, controlling bath temperature, water-bath adds for 125 DEG C
Thermal agitation 0.5h, obtains compatibilizing aid；
C, by gained base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber, stabilizer according to
100：13：1.5：30：1.5：0.1 ratio mixing addition with high-speed shearing machine shear 20min, cutter rotating speed for 6000 turns/
Min, shear temperature are 150 DEG C, and then at 125 DEG C of baking oven inside holding 1h, heat preservation, which is placed under normal temperature condition, to be cooled to room temperature, and is obtained
To aging-resisting type regenerative agent.
3rd, mix-design
It mixes slag Recycled Asphalt Pavement to be made of slag, RAP, miberal powder, new pitch, aging-resisting type regenerative agent, ratio
Design process is as follows：
A, obtained slag is placed in the capacity bucket of 10L, measures its stamped density ρF1For 2.08g.cm3, slag
Apparent density is ρFFor 3.20g.cm3；ρkIt is 2.68g.cm for miberal powder density3。
B, obtained RAP is placed in the capacity tube of 5L, measures its stamped density ρA1For 2.18g.cm3, RAP's is apparent
Density is ρAFor 2.5g.cm3；
C, the quality m of slagFFor 100, then the dosage m of RAPAFor 17.6, the m of miberal powderkQuality is 7.2；
D, the quality m of aging-resisting type regenerative agentcFor the dosage m of RAPA10%, quality 1.76；
E, the quality m of new pitchbFor (mF+mA+mk) Y, coefficient Y value be 0.025, mbFor 3.12.
By above step, determine that slag, RAP, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：100：
17.6：7.2:3.12:1.76.
The mixing of 4 mixtures
A, it is 100 in mass ratio：17.6：7.2:3.12:1.76 ratio weighs slag, RAP, miberal powder, new pitch, resistance to old
Change type regenerative agent, it is spare；
B, slag is heated to 180 DEG C, RAP is heated to 150 DEG C, and new pitch is heated to 160 DEG C；
C, after will warm up the slag of set point of temperature and RAP mixings 60s, it is heated to the new drip of set point of temperature
Green grass or young crops stirs 60s, adds aging-resisting type regenerative agent, stirs 60s, is eventually adding miberal powder, stirs 60s, is made and mixes slag regeneration drip
Blue or green concrete.
The slag is the byproduct of steel-making, and for crush values less than or equal to 24%, Los Angeles wearing valve is less than or equal to 24%,
Water absorption rate is less than or equal to 3%, and the RAP is to handle the discarded bituminous concrete material obtained by special equipment to old asphalt pavement
Material.The industry oil is catalytic cracking diesel oil, and the epoxidized soybean oil epoxide number is 6.8%, and the wax-crystal dispersing auxiliary is micro-
Brilliant wax, fusing point are 100 DEG C -105 DEG C, and the low temperature flow agent is ethylene-vinyl acetate analog copolymer.The antioxidant is alkane
Base diphenylamines antioxidant, the light absorber are ultraviolet absorbent UV-531.The SBS modifier is modified for linear SBS
Agent, the stabilizer are cumyl peroxide.The miberal powder obtains for lime stone grinding, 0.075mm sieve pore percent of pass 80%-
95%.The new pitch is No. 70 asphalt or I-D modified pitch.
Embodiment 3：
1st, slag and RAP classifications processing.
Slag is placed in the sieve of 5mm, carry out vibrations sieving a, takes the slag on sieve spare；
RAP is placed in the sieve of 5mm, carry out vibrations sieving b, takes the RAP under sieve spare.
2nd, the preparation of aging-resisting type regenerative agent
A, by industry oil and epoxidized soybean oil according to 70：30 ratio mixing, it is 70 DEG C to control water bath heating temperature, water-bath
Heating stirring 3h, obtains base oil；
B, by wax-crystal dispersing auxiliary and low temperature fluidity improver according to 0.6:19.5, it is 125 DEG C to control bath temperature, water-bath
Heating stirring 1h, obtains compatibilizing aid；
C, by gained base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber, stabilizer according to
100：17：1：60：1：0.5 ratio mixing addition shears 50min with high-speed shearing machine, and cutter rotating speed is 10000 turns/min,
Shear temperature is 150 DEG C, and then at 125 DEG C of baking oven inside holding 2h, heat preservation, which is placed under normal temperature condition, to be cooled to room temperature, and is obtained resistance to
Aging type regenerative agent.
3rd, mix-design
It mixes slag Recycled Asphalt Pavement to be made of slag, RAP, miberal powder, new pitch, aging-resisting type regenerative agent, ratio
Design process is as follows：
A, obtained slag will be screened to be placed in the capacity bucket of 10L, measures its stamped density ρF1For 2.08g.cm3, steel
The apparent density of slag is ρFFor 3.20g.cm3；ρkIt is 2.68g.cm for miberal powder density3。
B, obtained RAP will be screened to be placed in the capacity tube of 5L, measures its stamped density ρA1For 2.18g.cm3, RAP's
Apparent density is ρAFor 2.5g.cm3；
C, the quality m of slagFFor 100, then the dosage m of RAPAFor 17.6, the m of miberal powderkQuality is 7.2；
D, the quality m of aging-resisting type regenerative agentcFor the dosage m of RAPA15%, quality 2.64；
E, the quality m of new pitchbFor (mF+mA+mk) Y, coefficient Y value be 0.015, mbFor 1.87；
By above step, determine that slag, RAP, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：100：
17.6：7.2:1.87:2.64.
The mixing of 4 mixtures
A, it is 100 in mass ratio：17.6：7.2:1.87:2.64 ratio weighs slag, RAP, miberal powder, new pitch, resistance to old
Change type regenerative agent, it is spare；
B, slag is heated to 210 DEG C, RAP is heated to 120 DEG C, and new pitch is heated to 170 DEG C；
C, after will warm up the slag of set point of temperature and RAP mixings 90s, it is heated to the new drip of set point of temperature
Green grass or young crops stirs 90s, adds aging-resisting type regenerative agent, stirs 90s, is eventually adding miberal powder, stirs 90s, is made and mixes slag regeneration drip
Blue or green concrete.
The slag is the byproduct of steel-making, and for crush values less than or equal to 24%, Los Angeles wearing valve is less than or equal to 24%,
Water absorption rate is less than or equal to 3%, and the RAP is to handle the discarded bituminous concrete material obtained by special equipment to old asphalt pavement
Material.The industry oil is catalytic cracking diesel oil, and the epoxidized soybean oil epoxide number is 6.8%, and the wax-crystal dispersing auxiliary is micro-
Brilliant wax, fusing point are that 100 DEG C -105 DEG C low temperature flow agent are ethylene-vinyl acetate analog copolymer.The antioxidant is alkane
Base diphenylamines antioxidant, the light absorber are ultraviolet absorbent UV-531.The SBS modifier is modified for linear SBS
Agent, the stabilizer are cumyl peroxide.The miberal powder obtains for lime stone grinding, 0.075mm sieve pore percent of pass 80%-
95%.The new pitch is No. 70 asphalt or I-D modified pitch.
Embodiment 4：
1st, slag and RAP classifications processing.
Slag is placed in the sieve of 5.2mm, carry out vibrations sieving a, takes the slag on sieve spare；
RAP is placed in the sieve of 5.2mm, carry out vibrations sieving b, takes the RAP under sieve spare.
2nd, the preparation of aging-resisting type regenerative agent
A, by industry oil and epoxidized soybean oil according to 80：20 ratio mixing, it is 80 DEG C to control water bath heating temperature, water-bath
Heating stirring 3h, obtains base oil；
B, by wax-crystal dispersing auxiliary and low temperature fluidity improver according to 1:10, it is 130 DEG C to control bath temperature, heating water bath
1h is stirred, obtains compatibilizing aid；
C, by gained base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber, stabilizer according to
100：20：0.5：80：0.5：0.5 ratio mixing addition with high-speed shearing machine shear 50min, cutter rotating speed for 10000 turns/
Min, shear temperature are 130 DEG C, and then at 130 DEG C of baking oven inside holding 2h, heat preservation, which is placed under normal temperature condition, to be cooled to room temperature, and is obtained
To aging-resisting type regenerative agent.
3rd, mix-design
It mixes slag Recycled Asphalt Pavement to be made of slag, RAP, miberal powder, new pitch, aging-resisting type regenerative agent, ratio
Design process is as follows：
A, obtained slag will be screened to be placed in the capacity bucket of 10L, measures its stamped density ρF1For 2.08g.cm3, steel
The apparent density of slag is ρFFor 3.20g.cm3；ρkIt is 2.68g.cm for miberal powder density3。
B, the RAP obtained in step 1 is placed in the capacity tube of 5L, measures its stamped density ρA1For 2.18g.cm3, RAP
Apparent density be ρAFor 2.5g.cm3；
C, the quality m of slagFFor 100, then the dosage m of RAPAFor 17.6, the m of miberal powderkQuality is 7.2；
D, the quality m of aging-resisting type regenerative agentcFor the dosage m of RAPA20%, quality 3.52；
E, the quality m of new pitchbFor (mF+mA+mk) Y, coefficient Y value be 0.01, mbFor 1.25
By above step, determine that slag, RAP, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：100：
17.6：7.2:1.25:3.52.
The mixing of 4 mixtures
A, it is 100 in mass ratio：17.6：7.2:1.25:3.52 ratio weighs slag, RAP, miberal powder, new pitch, resistance to old
Change type regenerative agent, it is spare；
B, slag is heated to 210 DEG C, RAP is heated to 120 DEG C, and new pitch is heated to 170 DEG C；
C, after will warm up the slag of set point of temperature and RAP mixings 90s, it is heated to the new drip of set point of temperature
Green grass or young crops stirs 90s, adds aging-resisting type regenerative agent, stirs 90s, is eventually adding miberal powder, stirs 90s, is made and mixes slag regeneration drip
Blue or green concrete.
The slag is the byproduct of steel-making, and for crush values less than or equal to 24%, Los Angeles wearing valve is less than or equal to 24%,
Water absorption rate is less than or equal to 3%, and the RAP is to handle the discarded bituminous concrete material obtained by special equipment to old asphalt pavement
Material.The industry oil is catalytic cracking diesel oil, and the epoxidized soybean oil epoxide number is 6.8%, and the wax-crystal dispersing auxiliary is micro-
Brilliant wax, fusing point are that 100 DEG C -105 DEG C low temperature flow agent are ethylene-vinyl acetate analog copolymer.The antioxidant is alkane
Base diphenylamines antioxidant, the light absorber are ultraviolet absorbent UV-531.The SBS modifier is modified for linear SBS
Agent, the stabilizer are cumyl peroxide.The miberal powder obtains for lime stone grinding, 0.075mm sieve pore percent of pass 80%-
95%.The new pitch is No. 70 asphalt or I-D modified pitch.
Table 1 compares for this technology and the properties of common SMA and regeneration SMA, the results showed that, prepared by this technology mixes steel
Slag Recycled Asphalt Pavement has excellent pavement performance and ageing-resistant performance.
Table 1 mixes slag Recycled Asphalt Pavement performance comparison
Note：1st, the Marshall stability in table, dynamic stability, freeze-thaw split intensity ratio, soak residual stability ratio, joins
It is carried out according to JTGE20-2011 highway engineerings pitch and Asphalt Mixture Experiment regulation.
2nd, Marshall loss of strength rate is in the case where wavelength is the CHF125W-03 type mercury lamps of 365nm, controls all black matrix temperature
It spends for 60 DEG C, ultraviolet light irradiation 72h carries out simulation senile experiment, measures Marshall stability after aging, so as to show that simulation is old
Change Marshall loss of strength rate after testing.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. one kind mixes slag Recycled Asphalt Pavement, which is characterized in that is made of following raw materials according：Slag, discarded bituminous concrete,
Aging-resisting type regenerative agent, miberal powder and new pitch；The aging-resisting type regenerative agent is made of following raw materials according：Base oil, compatibilizing aid,
It is alkylated antioxidant, SBS modifier, light absorber and stabilizer；The base oil is made of following raw materials according：Industry oil and epoxy
Soybean oil；The compatibilizing aid is made of following raw materials according：Wax-crystal dispersing auxiliary and low temperature fluidity improver.
2. one kind according to claim 1 mixes slag Recycled Asphalt Pavement, which is characterized in that the slag, discarded drip
Blue or green concrete, miberal powder, new pitch, the mass ratio of aging-resisting type regenerative agent are：
Wherein, ρF1For slag stamped density, ρFFor slag apparent density, ρA1For discarded bituminous concrete stamped density, ρAIt is useless
Abandon bituminous concrete apparent density, ρkFor miberal powder density, the value of coefficient Y is 0.01-0.03.
3. one kind according to claim 1 mixes slag Recycled Asphalt Pavement, which is characterized in that the base oil, compatible
Auxiliary agent, alkylation antioxidant, SBS modifier, light absorber, the mass ratio of stabilizer are 100：(10-20)：(0.5-2)：(1-
80)：(0.5-1)：(0.1-0.5), and the alkylation antioxidant is alkylated diphenylamine antioxidant, the light absorber is purple
Ultraviolet absorbers UV-531, the SBS modifier are linear SBS modifier, and the stabilizer is cumyl peroxide.
4. one kind according to claim 1 mixes slag Recycled Asphalt Pavement, which is characterized in that the industry oil and epoxy
The mass ratio of soybean oil is (60-80)：(40-20), the industry oil be catalytic cracking diesel oil, the epoxidized soybean oil epoxide number
For 6.8%.
5. one kind according to claim 1 mixes slag Recycled Asphalt Pavement, which is characterized in that the wax-crystal dispersing auxiliary
Mass ratio with low temperature fluidity improver is (0.5-1):(10-20), the wax-crystal dispersing auxiliary are microwax, and fusing point is
100 DEG C -105 DEG C, the low temperature fluidity improver is ethylene-vinyl acetate analog copolymer.
A kind of 6. preparation method that slag Recycled Asphalt Pavement is mixed as described in claim any one of 1-5, which is characterized in that tool
Body includes the following steps：
S100, slag is heated to 180-210 DEG C, discarded bituminous concrete is heated to 120 DEG C -150 DEG C, and new pitch is heated to
It is 160-170 DEG C, spare；
After 60-90s is mixed in S200, the slag that will warm up set point of temperature and discarded bituminous concrete, it is heated to advising
The new pitch of constant temperature degree stirs 60-90s, adds aging-resisting type regenerative agent, stirs 60-90s, is eventually adding miberal powder, stirs
60-90s is made and mixes slag Recycled Asphalt Pavement.
7. preparation method according to claim 6, which is characterized in that in the S200, the crush values of slag are less than or equal to
24%, Los Angeles wearing valve is less than or equal to 24%, and water absorption rate is less than or equal to 3%.
8. preparation method according to claim 6, which is characterized in that in the S200, the specific preparation process of base oil
It is as follows：Industry oil with epoxidized soybean oil is mixed, controls water bath heating temperature as 60 DEG C -80 DEG C, heating water bath stirring 2h-3h,
Obtain base oil.
9. preparation method according to claim 6, which is characterized in that in the S200, the specific of compatibilizing aid prepares step
It is rapid as follows：Wax-crystal dispersing auxiliary is mixed with low temperature fluidity improver, it is 115 DEG C -130 DEG C to control bath temperature, heating water bath
0.5h-1h is stirred, obtains compatibilizing aid.
10. preparation method according to claim 6, which is characterized in that in the S200, aging-resisting type regenerative agent it is specific
Preparation process is as follows：It is first that base oil, compatibilizing aid, alkylation antioxidant, SBS modifier, light absorber and stabilizer is high
Fast cutter shearing, 140 DEG C -160 DEG C of shear temperature, then at 120 DEG C -130 DEG C of baking oven inside holding 1h-2h, heat preservation is placed on
It is cooled to room temperature under normal temperature condition, obtains aging-resisting type regenerative agent.
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| CN108046663B (en) | 2020-10-23 |
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