CN107501967A - Asphalt modifier, preparation method and the asphalt containing it - Google Patents
Asphalt modifier, preparation method and the asphalt containing it Download PDFInfo
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- CN107501967A CN107501967A CN201710744135.2A CN201710744135A CN107501967A CN 107501967 A CN107501967 A CN 107501967A CN 201710744135 A CN201710744135 A CN 201710744135A CN 107501967 A CN107501967 A CN 107501967A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, 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
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of asphalt modifier, includes following component by weight/mass percentage composition：76~87wt% of rubber powder of waste tire；3~14wt% of high density polyethylene (HDPE)；3~10wt% of rubber reclaiming agent；The mass percent sum of raw material is 100wt%；The rubber reclaiming agent is the regenerative agent that rubber regeneration reaction is participated at 160 180 DEG C.The asphalt modifier technique is simple, can for a long time store and largely use junked tire, economizes on resources, cost is low, easy to operate, is easy to add in asphalt；The service life on road surface can be effectively improved, increases the security of road driving.
Description
Technical field
The invention belongs to asphalt pavement material field, and in particular to the preparation method and bituminous modifying agent of asphalt modifier
Asphalt.
Background technology
As the fast development of transportation, the raising year by year of the volume of traffic, being continuously increased for road loading capacity are traditional
Bituminous paving has been difficult to continue meet the needs of Modern Traffic；Modified pitch is as a kind of novel asphalt material, by reality
Trample and constantly upgraded in application, just progressively turn into the leading role of highway at home and abroad construction, modified pitch common at present mainly has
SBS modified pitch, rubber modified asphalt etc..
China is rubber country of consumption maximum in the world, and the first giant tyre producing country.According to statistics, China's wheel in 2014
Tire yield is more than 5.62 hundred million, and damaged tire yield is about 15,000,000 tons, and is just increased with annual 5%~6% speed.With
Waste tyre rubber powder modified pitch is undoubtedly the optimum utilization form of the damaged tire developed under green circulation economy theory；Currently, rubber
Main application of the glue modified pitch on highway has two kinds：First, for mixing asphalt, above making bituminous paving
Layer, to improve the performance on road surface comprehensively；Two are used as sealing, i.e. stress absorbing layer, with suppress sub-surface crack to
Upper reflection.
Wet-mixing rubber asphalt concrete is rubber powder or rubber grain to be mixed or are kneaded the rubber asphalt formed with pitch,
Then the compound mixed and stirred again with mineral aggregate as adhesive, shortcoming are that storage time is short, and producing must use in 24h, no
Then fail；Complex process is, it is necessary to set of special processing equipment.Dry mixing rubber asphalt concrete is by rubber powder and gathered materials in advance
After mixing and stirring blending, then spray into the compound that pitch mixing forms.The shortcomings that dry mixing rubber asphalt is that rubber powder is not easy to transport and thrown
Put.
CN101671144 discloses a kind of rubber powder modified asphalt and preparation method thereof, is mixed using wet-mixing rubber asphalt
The method of soil is coagulated, although obtained rubber powder modified asphalt is good with outstanding elasticity, deformability, and storage stability, its
Stability dependency is in addition stabilizer, complex process.CN105176115 discloses a kind of SBS rubber powder composite modified asphalts, system
Preparation Method is that matrix pitch is preheated into 180 DEG C, SBS modifier is added into the scattered 20min of heated bitumen high speed shearing, then
Add activator, rubber powder and stabilizer, and at 185 DEG C under conditions of high speed shear disperse 2h, it is compound to obtain SBS rubber powders
Modified pitch.This method reduces SBS dosage by SBS and the modifying function of two kinds of modifying agent of rubber powder, reduces modified drip
Blue or green cost, but still suffer from the defects of storage time is short.
Find it is a kind of prepare simple production process, launch it is simple, can store for a long time, cheap rubber modified asphalt tool
It is significant.
The content of the invention
For the deficiency in prior art, an object of the present invention is to provide a kind of asphalt modifier, the pitch
Modifying agent technique is simple, can for a long time store, be cheap；The raw material of asphalt modifier percentage composition by weight includes as follows
Component：
(a) rubber powder of waste tire 76-87wt%；
(b) high density low-pressure polyethylene 3-14wt%；
(c) rubber reclaiming agent 3-10wt%；
The weight/mass percentage composition sum of the asphalt modifier each component is 100wt%.
The rubber reclaiming agent refers to the regenerative agent that rubber regeneration reaction can be participated at 160-180 DEG C, preferred aromatic hydrocarbons oil, coal
Tar, pine tar, tall oil, naphthenic oil, combination of reclaimed grease any one or at least two combination.
The content of the rubber reclaiming agent is 3-10wt%, for example, 3wt%, 3.5wt%, 4wt%, 4.7wt%, 6wt%,
8wt%, 9.2wt%, 10wt% etc., preferably 4-9wt%.
The mesh number of the rubber powder of waste tire is 30-80 mesh, for example, 30 mesh, 35 mesh, 40 mesh, 45 mesh, 50 mesh, 55 mesh,
60 mesh, 65 mesh, 70 mesh, 75 mesh, 80 mesh etc., preferably 45-65 mesh.
Preferably, the rubber powder of waste tire is obtained by Waste tyre crushing, preferably by the tire of the model of lorry more than 900
Tread rubber crushes to obtain；Rubber powder of the present invention can be by commercially available.
The content of the rubber powder of waste tire is 76-87wt%, for example, 77wt%, 79wt%, 80wt%, 81wt%,
83wt%, 84wt%, 87wt% etc., preferably 79-84wt%.
The high density low-pressure polyethylene is extrusion level high-density low-pressure polyethylene, further described high density low pressure
Polyethylene can be by commercially available, such as extrusion grade HDPE DGDD- of the HDPE5000S of Yanshan Petrochemical, DOW Chemical
2480NT, the HDPE PE-100 etc. of Kpic.
Preferably, the density of the high density low-pressure polyethylene is 0.94-0.98g/cm3, such as 0.945g/cm,
0.947g/cm, 0.951g/cm, 0.956g/cm, 0.961g/cm, 0.968g/cm, 0.974g/cm, 0.979g/cm etc., preferably
0.95-0.97g/cm, preferably 0.96g/cm；The high density low-pressure polyethylene molecular weight is 40000-300000, such as
42000th, 68000,85000,93000,125000,220000,289000 etc., preferably 80000-200000；The high density
The softening point of low-pressure polyethylene is 120-140 DEG C, such as 123 DEG C, 127 DEG C, 131 DEG C, preferably 139 DEG C etc., 125-135 DEG C.
The content of the high density low-pressure polyethylene is 3-14wt%, for example, 3wt%, 5wt%, 7wt%, 10wt%,
12wt%, 14wt% etc., preferably 5-12wt%.
As optimal technical scheme, the asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 79-84wt%；
High density low-pressure polyethylene 5-12wt%；
Rubber reclaiming agent 4-9wt%；
The weight/mass percentage composition sum of the asphalt modifier each component is 100wt%.
Preferably, the asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 80wt%；
High density low-pressure polyethylene 11wt%；
Rubber reclaiming agent 9wt%；
The weight/mass percentage composition sum of the asphalt modifier each component is 100wt%.
Preferably, the asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 83wt%；
High density low-pressure polyethylene 11wt%；
Rubber reclaiming agent 6wt%；
The weight/mass percentage composition sum of the asphalt modifier each component is 100wt%.
The asphalt modifier is into graininess black solid, particle diameter 1.8-4.8mm, such as 1.8-2.3mm, 2.3-
2.8mm, 2.8-3.3mm, 3.3-3.8mm, 3.8-4.3mm, 4.3-4.8mm etc., preferably 2.0-3.0mm.
The second object of the present invention is to provide a kind of preparation method of the asphalt modifier as described in one of the object of the invention, institute
Preparation method is stated, is comprised the following steps：
(1) rubber powder of waste tire is heated to 160-180 DEG C, such as 160 DEG C, 170 DEG C, 180 DEG C；
(2) add rubber reclaiming agent, it is clipped, stirring, mixing development 40-60min, as 42min, 45min, 48min,
51min, 54min, 55min, 56min, 60min etc.；
(3) high density polyethylene (HDPE) added after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, i.e.,
Obtain asphalt modifier.
Preferably, the shearing, stirring, extruding, pelletizing step are carried out in plastic extruders, or high-speed shearing machine.
Main raw material(s)-rubber powder of waste tire that the present invention uses is the junked tire in industry, life, and high density
Low-pressure polyethylene can select industrial waste particle, and the use of the two has handled " white " " black " refuse pollution, really realize
Junked tire, the recycling again of industrial waste, and cost of material is reduced, realize the development of green circulation economy；Into
Product stability is good, can store for a long time, and granular solid matter is presented in finished product, transports, feeds intake conveniently；And the property asphalt modifier system
Preparation Method technique is simple, easy.
The third object of the present invention is to provide a kind of application method of the asphalt modifier as described in one of the object of the invention, institute
The method of stating comprises the following steps：
(1) asphalt modifier described in one of claim 1-5 in room temperature was put into the gathering materials of heating, dry mixing
20-30s, such as 20s, 21s, 24s, 25s, 27s, 30s etc.；
(2) 160-180 DEG C of pitch is added, stirs 90s；
(3) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Preferably, the temperature gathered materials described in step (1) be 180-190 DEG C, such as 180 DEG C, 181 DEG C, 185 DEG C, 186 DEG C,
189 DEG C, 190 DEG C etc..
The also known as aggregate that gathers materials, is one of composition material of bituminous concrete known in those skilled in the art.
When laying road surface, those skilled in the art know, the selection gathered materials meets the pertinent regulations in JTG F40-2004, typical but non-
Restricted gathers materials to choose 9.5-13.2mm rubbles:4.75-9.5mm rubble:2.36-4.75mm rubble:0-2.36mm rubbles:
River sand=37:20:7:24.5:7.
The miberal powder is the general designation of the stone flour and its substitute that meet engine request, when in for bituminous concrete, this
Miberal powder known in art personnel is obtained by hydrophobicity building stones such as the strong basis rocks in limestone or magmatic rock through levigate.Spreading
If during road surface, those skilled in the art know, the selection of miberal powder meets the pertinent regulations in JTGF40-2004.
The fourth object of the present invention is to provide a kind of asphalt, and the asphalt is included by weight/mass percentage composition
Following component：
Preferably, in the asphalt, the addition of the asphalt modifier described in the first purpose is 4-5wt%, excellent
Select 4.5wt%.
Further, the asphalt is obtained by the application method of the asphalt modifier.
In asphalt of the present invention, 5% asphalt modifier as described in one of the object of the invention is added, its
Dynamic stability can reach more than 5000/ time, and stability can reach more than 12/KN, and cost is lower than SBS modified pitch
15%；Certainly, during the road surfacing of reality, 5% asphalt modifier as described in one of the object of the invention is added, just
Actual demand can be reached.
After the completion of prepared by the asphalt, Paving roadways can be directly carried out, i.e., are compacted bituminous mixture laying.
The asphalt can effectively improve 1-3 times of the service life on road surface, and can be by the way of delivering directly
It is cost-effective.
The five of the object of the invention are to provide a kind of purposes of junked tire, and the junked tire is prepared into rubber powder addition and existed
In asphalt modifier.
Compared with prior art, the present invention has the advantages that：
(1) technique is simple：Asphalt modifier preparation technology in the present invention is simple；And the asphalt modifier used
Cheng Zhong, it is only necessary to by asphalt modifier asphalt measure heat gather materials while, by asphalt modifier launch enter be
Can, without each component of asphalt is added at times respectively, technique is simple to operation, when being added without strict control
Machine.
(2) cost is low：In asphalt modifier provided by the invention, addition has substantial amounts of industrial waste, can reduce cost,
Good environmental protection, and in order to obtain good effect simultaneously, suitable formula composition is have adjusted, such as adds proper amount of high density
Polyethylene is to obtain good mechanical performance, freeze-thaw split retained strength, soak residual stability etc.；Add at 160-180 DEG C
The lower regenerative agent for participating in rubber regeneration reaction enables to complete to waste tire rubber during asphalt modifier is prepared
Modification, after asphalt modifier is added asphalt, the stability of asphalt can be improved, such as dynamic stability, steady
Fixed degree, freeze-thaw split retained strength, immersion residual stability etc..
(3) good combination property：Asphalt modifier is finally in granular form, convenient transportation, storage time length；Asphalt can
To improve 1-3 times of Road Service Life, carbon black increases road surface black in rubber, high with the contrast of graticule, improves road driving
Security；Asphalt layering thickness can be effectively reduced, improves the ability in road surface low-temperature resistance crack.
Brief description of the drawings
Fig. 1 is asphalt modifier preparation technology flow chart of the present invention；
Fig. 2 is that asphalt of the present invention mixes and stirs process chart.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in understanding the present invention, is not construed as the concrete restriction to the present invention.
Embodiment 1：
A kind of asphalt modifier, is included by weight/mass percentage composition：
Rubber powder of waste tire 76wt%；
High density low-pressure polyethylene 14wt%；
Rubber reclaiming agent 10wt%.
Preparation method is：
Rubber powder of waste tire is heated to 160 DEG C, adds rubber reclaiming agent, and 60min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
1.8-2.3mm graininess black solid, produces asphalt modifier.
Application Example 1：
The asphalt modifier that embodiment 1 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 90wt%；
Pitch 3wt%；
Miberal powder 4wt%；
The asphalt modifier 3wt% that embodiment 1 provides.
Preparation method is：
(1) it will gather materials and be heated to 180 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 30s,
(3) 160 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 2：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 80wt%；
High density low-pressure polyethylene 11wt%；
Rubber reclaiming agent 9wt%.
Preparation method is：
Rubber powder of waste tire is heated to 170 DEG C, adds rubber reclaiming agent, and 45min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
2.3-2.8mm graininess black solid, produces asphalt modifier.
Application Example 2：
The asphalt modifier that embodiment 2 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 87wt%；
Pitch 3.5wt%；
Miberal powder 6wt%；
The asphalt modifier 3.5wt% that embodiment 2 provides.
Preparation method is：
(1) it will gather materials and be heated to 190 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 20s,
(3) 170 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 3：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 83wt%；
High density low-pressure polyethylene 11wt%；
Rubber reclaiming agent 6wt%.
Preparation method is：
Rubber powder of waste tire is heated to 180 DEG C, adds rubber reclaiming agent, and 40min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
2.8-3.3mm graininess black solid, produces asphalt modifier.
Application Example 3：
The asphalt modifier that embodiment 3 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 82wt%；
Pitch 5wt%；
Miberal powder 9wt%；
The asphalt modifier 4wt% that embodiment 3 provides.
Preparation method is：
(1) it will gather materials and be heated to 185 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 25s,
(3) 180 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 4：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 87wt%；
High density low-pressure polyethylene 3wt%；
Rubber reclaiming agent 10wt%.
Preparation method is：
Rubber powder of waste tire is heated to 165 DEG C, adds rubber reclaiming agent, and 50min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
3.3-3.8mm graininess black solid, produces asphalt modifier.
Application Example 4：
The asphalt modifier that embodiment 4 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 79wt%；
Pitch 6.5wt%；
Miberal powder 10wt%；
The asphalt modifier 4.5wt% that embodiment 4 provides.
Preparation method is：
(1) it will gather materials and be heated to 187 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 26s,
(3) 175 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 5：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 87wt%；
High density low-pressure polyethylene 10wt%；
Rubber reclaiming agent 3wt%.
Preparation method is：
Rubber powder of waste tire is heated to 161 DEG C, adds rubber reclaiming agent, and 49min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
3.8-4.3mm graininess black solid, produces asphalt modifier.
Application Example 5：
The asphalt modifier that embodiment 5 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 78wt%；
Pitch 7wt%；
Miberal powder 10wt%；
The asphalt modifier 5wt% that embodiment 5 provides.
Preparation method is：
(1) it will gather materials and be heated to 180 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 30s,
(3) 160 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 6：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 79wt%；
High density low-pressure polyethylene 12wt%；
Rubber reclaiming agent 9wt%.
Preparation method is：
Rubber powder of waste tire is heated to 172 DEG C, adds rubber reclaiming agent, and 58min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
4.3-4.8mm graininess black solid, produces asphalt modifier.
Application Example 6：
The asphalt modifier that embodiment 6 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 81wt%；
Pitch 6wt%；
Miberal powder 7.5wt%；
The asphalt modifier 5.5wt% that embodiment 6 provides.
Preparation method is：
(1) it will gather materials and be heated to 185 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 25s,
(3) 180 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 7：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 84wt%；
High density low-pressure polyethylene 8wt%；
Rubber reclaiming agent 4wt%.
Preparation method is：
Rubber powder of waste tire is heated to 178 DEG C, adds rubber reclaiming agent, and 59min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
3.3-3.8mm graininess black solid, produces asphalt modifier.
Application Example 7：
The asphalt modifier that embodiment 7 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 80wt%；
Pitch 7wt%；
Miberal powder 7wt%；
The asphalt modifier 6wt% that embodiment 7 provides.
Preparation method is：
(1) it will gather materials and be heated to 190 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 20s,
(3) 170 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Embodiment 8：
The asphalt modifier is included by weight/mass percentage composition：
Rubber powder of waste tire 86wt%；
High density low-pressure polyethylene 5wt%；
Rubber reclaiming agent 9wt%.
Preparation method is：
Rubber powder of waste tire is heated to 164 DEG C, adds rubber reclaiming agent, and 48min is developed in clipped, stirring, mixing, most
The high density polyethylene (HDPE) added afterwards after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, obtained particle diameter is
1.8-2.3mm graininess black solid, produces asphalt modifier.
Application Example 8：
The asphalt modifier that embodiment 1 is provided is added in asphalt in proportion, comprises the following steps that：
Asphalt is included by weight/mass percentage composition：
Gather materials 85wt%；
Pitch 4wt%；
Miberal powder 5wt%；
The asphalt modifier 6wt% that embodiment 8 provides.
Preparation method is：
(1) it will gather materials and be heated to 185 DEG C,
(2) asphalt modifier in room temperature was put into the gathering materials of heating, dry mixing 22s,
(3) 180 DEG C of pitch is added, stirs 90s；
(4) miberal powder of room temperature is added, 90s is stirred, that is, obtains asphalt.
Comparative example 1
Using pitch described in Application Example 1 as a comparison case 1.
Comparative example 2
A kind of SBS modified asphalt mixtures, include following component by weight/mass percentage composition：
Gather materials 90wt%；
SBS modified pitch 5wt%；
Miberal powder 5wt%.
Wherein, SBS modified pitch is that well known to a person skilled in the art pitch is modified using SBS.SBS is modified drip
Blue or green indices meet JTG F40-2004 regulation.
The preparation method of SBS modified asphalt mixtures is：It will gather materials and be heated to 180 DEG C with miberal powder, and add 160 DEG C of SBS
Modified pitch, stir 90s；Obtain SBS modified asphalt mixtures.
Comparative example 3
It is different from the formula for the differing only in asphalt modifier composition of embodiment 1 and Application Example 1, the institute of comparative example 3
The asphalt modifier used includes following component by weight/mass percentage composition：
Rubber powder of waste tire 84wt%；
High density low-pressure polyethylene 14wt%；
Rubber reclaiming agent 2wt%.
Comparative example 4
It is different from the formula for the differing only in asphalt modifier composition of embodiment 1 and Application Example 1, the institute of comparative example 4
The asphalt modifier used includes following component by weight/mass percentage composition：
Rubber powder of waste tire 75wt%；
High density low-pressure polyethylene 14wt%；
Rubber reclaiming agent 11wt%.
Performance test：
By taking Application Example 1 as an example, performance test is carried out to asphalt, it is as follows：
(1) dynamic stability is tested
Standard specimen is made in asphalt, and size is 300mm × 300mm × 50mm, under 60 DEG C of set point of temperature, with
One wheel load is that 0.7MPa solid tire is walked thereon, speed be come and go for 6 times/point, test test specimen is in stabilization
Period, i.e., after experiment starts 50min, often increase the number that 1mm deformations need to walk, i.e. dynamic stability.
(2) Stabilily parameter
Push-down head on test specimen and Marshall is placed in 60 DEG C of constant temperature water baths, 40min is incubated, test specimen is loaded on upper push-down head
Between, and it is directed at the pressure head and sensor of load test；Make test specimen bearing load in test process, loading velocity for (50 ±
5) mm/min, the maximum that load test device is read is sample stability.
(3) freeze-thaw split is tested
The shaping of test specimen is carried out with reference to (ZY01-243-2008), and freeze thawing test specimen is hit 50 times in fact to be two-sided.Standard sample is put into 25
After DEG C water temperature immersion 2h, cleavage strength is determined；Freeze thawing sample is first put into negative-pressure container, after vacuum immersion 15min recovery normal pressures again
0.5h is placed in water, test specimen is put into the polybag equipped with 10mL water after full water, is put into -18 DEG C of environment and is freezed 16h, then will
Test specimen is put into 60 DEG C of water-bath 24h, and finally test specimen is put into 25 DEG C of water and soaks 2h, determines cleavage strength.
Freeze-thaw split retained strength ratio=(sample tensile splitting strength/standard sample tensile splitting strength after freeze thawing) ×
100%
(4) soak residual stability
Immersion Marshall test method and unique difference of standard Marshall method (Stabilily parameter method)
It is, test specimen soaking time in 60 DEG C of Water Tanks with Temp.-controlled is 48h.
Immersion residual stability is obtained by following formula：
Soak residual stability=(stability/sample stability after sample immersion 48h) × 100%
With reference to above-mentioned test, performance test is carried out to Application Example 1-8, test result is as shown in table 1：
The performance of asphalt mixture test result of table 1
As shown in Table 1, the asphalt dynamic stability that the present invention obtains reaches 12kN up to 5000 times/more than mm, stability
More than, for freeze-thaw split retained strength ratio up to more than 80%, these performances confirm that asphalt provided by the invention can extend
The service life of road.
Comparative example 1-4 carries out above performance test, test result is obtained, by Application Example 1, comparative example 1 and comparative example 2
Performance comparison is carried out, data are shown in Table 2：
The performance test results of the Comparison study example 1 of table 2, comparative example 1 and comparative example 2
| Concrete making technology index | Comparative example 1 | Comparative example 2 | Application Example 1 |
| Dynamic stability (secondary/mm) | 1000 | 3000 | 5000 |
| Stability (kN) | 7.9 | 11.4 | 12.0 |
| Freeze-thaw split retained strength ratio/% | 75.0 | 84.3 | 80.2 |
| Soak residual stability/% | 80.0 | 85.1 | 85.0 |
| Material cost/% | 100 | 120 | 105 |
As shown in Table 2, asphalt provided by the invention has higher dynamic stability compared with SBS modified pitch,
I.e. road surface has longer service life.Although SBS modified pitch is more or less the same with other performances of the invention, due to SBS
Price is higher, and compared to SBS modified pitch, cost of the present invention is lower.
Application Example 1, comparative example 3 and the performance data of comparative example 4 are shown in Table 3：
The performance test results of the Comparison study example 1 of table 3, comparative example 3 and comparative example 4
| Concrete making technology index | Comparative example 3 | Comparative example 4 | Application Example 1 |
| Dynamic stability (secondary/mm) | 3010 | 3120 | 5000 |
| Stability (kN) | 10.1 | 10.5 | 12.0 |
| Freeze-thaw split retained strength ratio/% | 77.2 | 78.3 | 80.2 |
| Soak residual stability/% | 82.6 | 83.1 | 85.0 |
From table 1, table 2 and table 3, the present invention is added into pitch and mixed by adjusting the formula of asphalt modifier
Close in material, obtain the asphalt of excellent performance, wherein, dynamic stability up to 5000 times/more than mm, stability up to 12kN with
On, for freeze-thaw split retained strength ratio up to more than 80%, these performances confirm that asphalt provided by the invention can extend
The service life on road.Also, the asphalt modifier of the present invention and pitch mixing it can be seen from embodiment and Application Example
Preparation is simple for material.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of asphalt modifier, it is characterised in that the asphalt modifier includes following component by weight/mass percentage composition：
76~87wt% of rubber powder of waste tire；
3~14wt% of high density polyethylene (HDPE)；
3~10wt% of rubber reclaiming agent；
The mass percent sum of the raw material is 100wt%；
The rubber reclaiming agent is the regenerative agent that rubber regeneration reaction is participated at 160-180 DEG C.
2. asphalt modifier as claimed in claim 1, it is characterised in that the mesh number of the rubber powder is 30-80 mesh, the rubber
Rubber powder is obtained by Waste tyre crushing, is preferably obtained by the tire tread rubber pulverizing of the model of lorry more than 900；
Preferably, the high density low-pressure polyethylene is to extrude level high-density low-pressure polyethylene, the high density low-pressure polyethylene
Density be 0.94-0.98g/cm3, molecular weight 40000-300000, softening point is 120-140 DEG C.
3. asphalt modifier as claimed in claim 1 or 2, it is characterised in that the rubber reclaiming agent is selected from aromatic naphtha, coal tar
In oil, pine tar, tall oil, naphthenic oil, combination of reclaimed grease any one or at least two combination.
4. the asphalt modifier as described in one of claims 1 to 3, it is characterised in that graininess is made in the asphalt modifier
Black solid, preferably particle diameter 1.8-4.8mm, 2.0-3.0mm.
A kind of 5. preparation method of asphalt modifier as described in one of Claims 1 to 4, it is characterised in that the preparation side
Method comprises the following steps：
(1) rubber powder of waste tire is heated to 160-180 DEG C；
(2) rubber reclaiming agent, clipped, stirring, mixing development 40-60min are added；
(3) high density polyethylene (HDPE) added after heating and melting, continues to stir, extrudes, granulating, be finally cooled to room temperature, produce drip
Blue or green modifying agent.
6. the preparation method of asphalt modifier as claimed in claim 5, it is characterised in that the shearing, stirring, pressing steps
Carried out in plastic extruders, or high-speed shearing machine.
A kind of 7. application method of asphalt modifier as described in one of Claims 1 to 4, it is characterised in that the user
Method comprises the following steps：
(1) asphalt modifier described in one of claim 1-4 in room temperature was put into the gathering materials of heating, dry mixing 20-
30s；
(2) 160-180 DEG C of pitch is added, stirs 90s；
(3) miberal powder of room temperature is added, stirs 90s；
Preferably, aggregate temperature described in step (1) is 180-190 DEG C.
8. a kind of asphalt, it is characterised in that the asphalt includes following component by weight/mass percentage composition：
Preferably, in the asphalt, the addition of the asphalt modifier described in one of claim 1-4 is 4-5wt%,
It is preferred that 4.5wt%.
9. asphalt as claimed in claim 8, it is characterised in that asphalt side as described in claim 8
Method obtains.
10. a kind of purposes of junked tire, it is characterised in that the junked tire is prepared into rubber powder addition in asphalt modifier
In.
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| CN110885564A (en) * | 2019-12-05 | 2020-03-17 | 达州市禾原再生资源有限公司 | Hot-recycling asphalt mixture recycling agent |
| CN111218122A (en) * | 2020-02-26 | 2020-06-02 | 上海永玺环境科技有限公司 | Fiber-containing modifier for asphalt and preparation method of modifier asphalt mixture |
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