CN108003637A - A kind of diatom complex modified asphalt mixture and preparation method thereof - Google Patents
A kind of diatom complex modified asphalt mixture and preparation method thereof Download PDFInfo
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- CN108003637A CN108003637A CN201711182085.XA CN201711182085A CN108003637A CN 108003637 A CN108003637 A CN 108003637A CN 201711182085 A CN201711182085 A CN 201711182085A CN 108003637 A CN108003637 A CN 108003637A
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/06—Copolymers with styrene
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2495/00—Bituminous materials, e.g. asphalt, tar or pitch
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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
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention discloses a kind of diatom complex modified asphalt mixture and preparation method thereof, belongs to highway structure field of material technology.The composite modified asphalt mixture is that 98 99% parts by weight asphalts and 1 2% parts by weight diatom complex modified particles form, and diatom complex modified particles are to be granulated obtained particle in following materials by weight percentage mixing rear chamber：Diatomite 30 38%, Oak Tree composite material 16 22%, SBR powder 8 11%, pitch 35 40%, is granulated by pitch as granulating agent.Diatomite, Oak Tree composite material, the heating mixing of SBR powder are weighed in proportion, are added to be granulated pitch and heat up and are stirred to paste, indoor granulation, is added in asphalt.Have the advantages that to improve stability at high temperature of asphalt mixture, low-temperature cracking-resistance, water stability, anti-aging property and anti-fatigue performance, can be widely used for the production of asphalt.
Description
Technical field
The present invention relates to a kind of diatom complex modified asphalt material, especially a kind of diatom complex modified asphalt mixture and
Its preparation method, belongs to highway structure field of material technology.
Background technology
Diatom is formed by remains (the being commonly called as diatom test) accumulation of unicellular low water plant diatom, and essence is without fixed
Type noncrystalline.It is larger with hardness, it is one the features such as rough surface, the multi-pore structure of wear-resisting, antiskid, acid and alkali-resistance and uniqueness
The extraordinary modified asphalt material of kind, can preferably improve the road surface correlated performance of asphalt, lift bituminous paving
Low-temperature cracking-resistance and high temperature durability.
Substantial amounts of high purity silicon diatomaceous earth is applied to sewage disposal at present, cosmetics add etc., applied to only having on road surface
Diatomite, the performance increase rate of road pavement asphalt is little, and modified is applied to road to diatomite is for composite
The example in face is less, therefore is badly in need of researching and developing diatom complex modified material, and proposes that the diatom complex that performance is stablized is modified
Material prescription.
The content of the invention
The technical problem to be solved in the present invention is the bituminous paving being only used for for existing diatomite to low-grade highway
Be modified, it is modified ineffective, but the research that is modified of diatom complex again very less the deficiencies of, there is provided a kind of diatom complex is modified
Granular recipe and its mixing preparation method for material, using diatom complex material, diatom complex modified particles are formed using granulating technique,
Be added in asphalt, improve the high-temperature stability of asphalt, water stability, low-temperature cracking-resistance, it is anti-aging and
Anti-fatigue performance.
In order to solve the above technical problems, the present invention proposes a kind of diatom complex modified asphalt mixture, it is described composite modified
Asphalt is the mixture of 98-99% parts by weight asphalt and 2-1% parts by weight diatom complex modified particles, the silicon
The composite modified particle of algae is to be granulated obtained particle in following materials by weight percentage mixing rear chamber：Diatomite 30-38%, Oak Tree
Composite material 16-22%, SBR powder 8-11%, pitch 35-40%, are granulated by pitch as granulating agent.
The diatomite is rotary strainer algae or small ring algae, diatom content >=75%, diatom pitch 10-30um, ratio in diatomite
Surface area >=25m2The g/cm of/g, water content≤5%, bulk density≤0.53, pH value >=7.0, SiO2≥75%、Al2O3≤13%、
Fe2O3≤5%。
The Oak Tree composite material presses 1 for rubber and polyethylene:The powdery ground after the cooling of 1 weight ratio high temperature fusion
Material；The granularity of Oak Tree composite material is 40-60 mesh, and the granularity of SBR powder is 40-80 mesh.
The diatom complex modified particles are the bar-shaped little particle of long 0.5-1cm, diameter 0.3-0.6cm.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Weigh diatomite to be put into dry vessel, be proportionally added into Oak Tree composite material, SBR powder is uniformly mixed, be heated to
60-70 DEG C, obtain composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 100-110 DEG C, is added to step while stirring（1）Gained is composite modified
In diatomite, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 80-100 DEG C, stirs 10-20min, stir speed (S.S.) 300-500r/
Min, makes material obtain being thoroughly mixed uniformly, is then fabricated to bar indoors, is granulated by small granulator, by making
Grain program is granulated out the bar-shaped little particle of long 0.5-1cm, diameter 0.3-0.6cm, and one layer of interleaving agent is wrapped outside particle, obtains
Diatom complex modified particles；Interleaving agent is conventional material particles interleaving agent, such as lime, miberal powder, diatomite.
（4）Asphalt is configured by code requirement, then weighs step by match ratio requirement（3）Obtained diatom complex
Modified particles, are added in the asphalt being stirred with the speed of 5-15g/min, add, exist again after adding while stirring
Mix 40-50s under 170-180 DEG C of temperature conditionss, mixing speed 200-400r/min, that is, obtain the mixing of diatom complex modified pitch
Material.
In the preparation method of diatom complex modified asphalt mixture of the present invention：The diatomite is rotary strainer algae or small ring
Algae, diatom content >=75%, diatom pitch 10-30um, specific surface area >=25m in diatomite2/ g, water content≤5%, bulk density
≤0.5g/cm3, pH value >=7.0, SiO2≥75%、Al2O3≤13%、Fe2O3≤5%；Oak Tree composite material is rubber and polyethylene
By 1:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion, the granularity of Oak Tree composite material is 40-60 mesh；SBR powder
The granularity at end is 40-80 mesh.
The asphalt is the asphalt configured by code requirement, such as SBS modified asphalt mixtures, road stone
Oil asphalt mixture, anti-rut agent asphalt etc..
Pitch used in the present invention is generally No. 70 bi tumenf orr oads or No. 90 bi tumenf orr oads or SBS modified pitch mixes
Close material.
The use of each raw material dosage of the present invention and technological parameter can be selected according to actual needs in the range of given pavement performance
Select, and accommodation can be made according to engineering practice.
The present invention utilizes diatom complex Oak Tree material and SBR powder, and forms diatom complex using granulating technique and be modified
Particle, is added in asphalt, the characteristics of can giving full play to diatom material, preferably improves the road surface of asphalt
Correlated performance, lifts the low-temperature cracking-resistance and high temperature durability of bituminous paving, effectively improve asphalt high-temperature stability,
Water stability, low-temperature cracking-resistance, anti-aging and anti-fatigue performance.
Embodiment
The embodiment of the present invention is further described in detail below.The technology being not specified in embodiment or production
Product are the prior art or can be by buying the conventional products obtained.
Example 1：This diatom complex modified asphalt mixture is 98% parts by weight plain asphalt mixture and 2% parts by weight diatom
The mixture of composite modified particle, the diatom complex modified particles are granulated in following materials by weight percentage mixing rear chamber
The particle arrived：Diatomite 30%, Oak Tree composite material 22%, SBR powder 8%, pitch 40%, is used as by No. 70 bi tumenf orr oads and made
Granula is granulated.
Diatomite is rotary strainer algae or small ring algae, diatom content >=75%, diatom pitch 10um, specific surface area in diatomite
≥25m2/ g, water content≤5%, bulk density≤0.5g/cm3, pH value=7.0, SiO2=75%、Al2O3=13%、Fe2O3=5%.Rubber
Set composite material and press 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion；Oak Tree is compound
The granularity of material is 40 mesh, and the granularity of SBR powder is 40 mesh；Diatom complex modified particles are long 0.5cm, the rod of diameter 0.3cm
Shape little particle.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Satisfactory diatomite is weighed to be put into dry vessel, be proportionally added into 40 mesh of granularity Oak Tree composite material and
The SBR powder of 40 mesh of granularity is uniformly mixed, and is heated to 60 DEG C, obtains composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 100 DEG C, is added to step while stirring（1）The composite modified diatom of gained
In soil, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 80 DEG C, stirs 20min, stir speed (S.S.) 300r/min, makes material
Obtain being thoroughly mixed uniformly, be then fabricated to bar indoors, be granulated by small granulator, be granulated by program is granulated
Go out the bar-shaped little particle of long 0.5cm, diameter 0.3cm, and one layer of miberal powder interleaving agent is wrapped outside particle, obtain diatom complex modification
Particle；
（4）SBS modified asphalt mixtures are configured by code requirement, then weigh step by match ratio requirement（3）Obtained diatom
Composite modified particle, is added in the good asphalt of mixture with the speed of 5g/min, adds, exist again after adding while stirring
Mix 45s under 170 DEG C of temperature conditionss, mixing speed 400r/min, that is, obtain diatom complex modified asphalt mixture.
In the present embodiment, the preparation method of SBS modified asphalt mixtures is：
（1）70# matrix pitches are heated to 150 DEG C, are then proportionally added into Styrene-Butadiene-Styrene Block Copolymer
Mixture is obtained, the mixture is warming up to 180 DEG C, stirs 30min, stir speed (S.S.) 500r/min；
（2）The mixture obtained to previous step carries out shear treatment 30min, 180 DEG C of shear temperature, shear rate 4500r/
min；
（3）Polyphosphoric acids stabilizer is added into the mixture after previous step is handled in proportion, under 180 DEG C of temperature conditionss
Continue to shear 25min, then develop 1h, obtain SBS modified pitch；
（4）Good various building stones are weighed by the match ratio requirement of building stones, are added（3）In obtained SBS modified pitch, be stirred
It is even, that is, obtain SBS modified asphalt mixtures.
According to《Highway engineering pitch and Asphalt Mixture Experiment code》（JTG E20-2011）Specified in method to this
Embodiment diatom complex modified asphalt mixture carries out Specifications test, 25 DEG C of needle penetrations（0.1mm）For 42
（0.1mm）, softening point is 87.5 DEG C.
Example 2：This diatom complex modified asphalt mixture is 98.5% parts by weight SBS modified asphalt mixtures and 1.5% weight
The mixture of part diatom complex modified particles is measured, the diatom complex modified particles are following materials by weight percentage mixing rear chambers
It is interior to be granulated obtained particle：Diatomite 38%, Oak Tree composite material 16%, SBR powder 11%, pitch 35%, by 90# pitch conducts
Granulating agent is granulated.
Diatomite is rotary strainer algae or small ring algae, diatom content >=80%, diatom pitch 30um, specific surface area in diatomite
≥30m2/ g, water content≤3%, bulk density≤0.3g/cm3, pH value=7.5, SiO2=78%、Al2O3=10%、Fe2O3=3%.Rubber
Set composite material and press 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion；Oak Tree is compound
The granularity of material is 60 mesh, and the granularity of SBR powder is 80 mesh；Diatom complex modified particles be long 1cm, diameter 0.6cm it is bar-shaped
Little particle.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Satisfactory diatomite is weighed to be put into dry vessel, be proportionally added into 60 mesh of granularity Oak Tree composite material and
The SBR powder of 80 mesh of granularity is uniformly mixed, and is heated to 70 DEG C, obtains composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 110 DEG C, is added to step while stirring（1）The composite modified diatom of gained
In soil, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 100 DEG C, stirs 10min, stir speed (S.S.) 500r/min, makes material
Obtain being thoroughly mixed uniformly, be then fabricated to bar indoors, be granulated by small granulator, be granulated by program is granulated
Go out the bar-shaped little particle of long 1cm, diameter 0.6cm, and one layer of lime interleaving agent is wrapped outside particle, obtain diatom complex modification
Grain；
（4）SBS modified asphalt mixtures are configured by code requirement, then weigh step by match ratio requirement（3）Obtained diatom
Composite modified particle, is added in the good asphalt of mixture with the speed of 15g/min, adds, exist again after adding while stirring
Mix 40s under 180 DEG C of temperature conditionss, mixing speed 200r/min, that is, obtain diatom complex modified asphalt mixture.
In the present embodiment, the preparation method of SBS modified asphalt mixtures is：
（1）90# matrix pitches are heated to 140 DEG C, are then proportionally added into Styrene-Butadiene-Styrene Block Copolymer
Mixture is obtained, the mixture is warming up to 170 DEG C, stirs 60min, stir speed (S.S.) 300r/min；
（2）The mixture obtained to previous step carries out shear treatment 30min, 170 DEG C of shear temperature, shear rate 3000r/
min；
（3）Maleic anhydride stabilizer is added into the mixture after previous step is handled in proportion, under 170 DEG C of temperature conditionss
Continue to shear 40min, then develop 1.5h, obtain SBS modified pitch；
（4）Good various building stones are weighed by the match ratio requirement of building stones, is uniformly mixed, that is, obtains SBS modified asphalt mixtures.
According to《Highway engineering pitch and Asphalt Mixture Experiment code》（JTG E20-2011）Specified in method to this
Embodiment diatom complex modified asphalt mixture carries out Specifications test, 25 DEG C of needle penetrations（0.1mm）For 42, softening point
For 83.5 DEG C
Example 3：This diatom complex modified asphalt mixture is 99% parts by weight SBS modified asphalt mixtures and 1% parts by weight diatom
The mixture of composite modified particle, the diatom complex modified particles are granulated in following materials by weight percentage mixing rear chamber
The particle arrived：Diatomite 35%, Oak Tree composite material 18%, SBR powder 9%, pitch 38%, is carried out by 70# pitches as granulating agent
It is granulated.
Diatomite is rotary strainer algae or small ring algae, diatom content >=78%, diatom pitch 20um, specific surface area in diatomite
≥28m2/ g, water content=4%, bulk density≤0.4g/cm3, pH value=7.2, SiO2=78%、Al2O3=11%、Fe2O3=4.5%.Rubber
Set composite material and press 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion；Oak Tree is compound
The granularity of material is 50 mesh, and the granularity of SBR powder is 60 mesh；Diatom complex modified particles are long 0.8cm, the rod of diameter 0.5cm
Shape little particle.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Satisfactory diatomite is weighed to be put into dry vessel, be proportionally added into 50 mesh of granularity Oak Tree composite material and
The SBR powder of 60 mesh of granularity is uniformly mixed, and is heated to 65 DEG C, obtains composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 105 DEG C, is added to step while stirring（1）The composite modified diatom of gained
In soil, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 90 DEG C, stirs 15min, stir speed (S.S.) 400r/min, makes material
Obtain being thoroughly mixed uniformly, be then fabricated to bar indoors, be granulated by small granulator, be granulated by program is granulated
Go out the bar-shaped little particle of long 0.8cm, diameter 0.5cm, and one layer of diatomite interleaving agent is wrapped outside particle, obtain diatom complex and change
Property particle；
（4）SBS modified asphalt mixtures are configured by code requirement, then weigh step by match ratio requirement（3）Obtained diatom
Composite modified particle, is added in the good asphalt of mixture with the speed of 10g/min, adds, exist again after adding while stirring
Mix 50s under 175 DEG C of temperature conditionss, mixing speed 300r/min, that is, obtain diatom complex modified asphalt mixture.
In the present embodiment, the preparation method of SBS modified asphalt mixtures is：
（1）70# matrix pitches are heated to 145 DEG C, are then proportionally added into Styrene-Butadiene-Styrene Block Copolymer
Mixture is obtained, the mixture is warming up to 170 DEG C, stirs 50min, stir speed (S.S.) 400r/min；
（2）The mixture obtained to previous step carries out shear treatment 50min, 170 DEG C of shear temperature, shear rate 3500r/
min；
（3）In proportion into the mixture after previous step is handled add elemental sulfur stabilizer, under 170 DEG C of temperature conditionss after
Continuous shearing 30min, then 2h is developed, obtain SBS modified pitch；
（4）Good various building stones are weighed by the match ratio requirement of building stones, is uniformly mixed, that is, obtains SBS modified asphalt mixtures.
According to《Highway engineering pitch and Asphalt Mixture Experiment code》（JTG E20-2011）Specified in method to this
Embodiment diatom complex modified asphalt mixture carries out Specifications test, 25 DEG C of needle penetrations（0.1mm）For 49
（0.1mm）, softening point is 83.5 DEG C.
Example 4：This diatom complex modified asphalt mixture is 98.8% parts by weight anti-rut agent asphalt and 1.2% weight
The mixture of part diatom complex modified particles is measured, the diatom complex modified particles are following materials by weight percentage mixing rear chambers
It is interior to be granulated obtained particle：Diatomite 36%, Oak Tree composite material 18%, SBR powder 10%, pitch 36%, by 70# pitch conducts
Granulating agent is granulated.
Diatomite is rotary strainer algae or small ring algae, diatom content >=76%, diatom pitch 15um, specific surface area in diatomite
≥35m2The g/ cm of/g, water content=3.55%, bulk density=0.33, pH value=7.1, SiO2=77%、Al2O3=10%、Fe2O3=2%。
Oak Tree composite material presses 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion；Oak Tree is answered
The granularity of condensation material is 45 mesh, and the granularity of SBR powder is 55 mesh；Diatom complex modified particles are long 0.6cm, diameter 0.4cm
Bar-shaped little particle.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Satisfactory diatomite is weighed to be put into dry vessel, be proportionally added into 45 mesh of granularity Oak Tree composite material and
The SBR powder of 50 mesh of granularity is uniformly mixed, and is heated to 62 DEG C, obtains composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 110 DEG C, is added to step while stirring（1）The composite modified diatom of gained
In soil, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 85 DEG C, stirs 18min, stir speed (S.S.) 450r/min, makes material
Obtain being thoroughly mixed uniformly, be then fabricated to bar indoors, be granulated by small granulator, be granulated by program is granulated
Go out the bar-shaped little particle of long 0.6cm, diameter 0.4cm, and one layer of lime interleaving agent is wrapped outside particle, obtain diatom complex modification
Particle；
（4）By code requirement mixture anti-rut agent asphalt, then step is weighed by match ratio requirement（3）Obtained diatom
Composite modified particle, is added in the good anti-rut agent asphalt of mixture with the speed of 8g/min, adds, add while stirring
The mix 43s under 180 DEG C of temperature conditionss again afterwards, mixing speed 250r/min, that is, obtain diatom complex modified asphalt mixture.
Example 5：This diatom complex modified asphalt mixture is 98.3% parts by weight Petroleum Asphalt Mixture for Road Lower and 1.7% weight
The mixture of part diatom complex modified particles is measured, the diatom complex modified particles are following materials by weight percentage mixing rear chambers
It is interior to be granulated obtained particle：Diatomite 30-38%, Oak Tree composite material 16-22%, SBR powder 8-11%, pitch 35-40%, by dripping
Green grass or young crops is granulated as granulating agent.
Diatomite is rotary strainer algae or small ring algae, diatom content >=85%, diatom pitch 25um, specific surface area in diatomite
≥27m2/ g, water content=2.5%, bulk density=0.4g/ cm3, pH value=7.4, SiO2=80%、Al2O3=9%、Fe2O3=1.5%。
Oak Tree composite material presses 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion；Oak Tree is answered
The granularity of condensation material is 55 mesh, and the granularity of SBR powder is 65 mesh；Diatom complex modified particles are long 0.7cm, diameter 0.5cm
Bar-shaped little particle.
The preparation method of diatom complex modified asphalt mixture of the present invention concretely comprises the following steps：
（1）Satisfactory diatomite is weighed to be put into dry vessel, be proportionally added into 55 mesh of granularity Oak Tree composite material and
The SBR powder of 70 mesh of granularity is uniformly mixed, and is heated to 68 DEG C, obtains composite modified diatomite；
（2）Granulation pitch is taken in proportion, is heated to 100 DEG C, is added to step while stirring（1）The composite modified diatom of gained
In soil, pasty mixture material is obtained；
（3）By step（2）Gained pasty mixture material is cooled to 95 DEG C, stirs 16min, stir speed (S.S.) 350r/min, makes material
Obtain being thoroughly mixed uniformly, be then fabricated to bar indoors, be granulated by small granulator, be granulated by program is granulated
Go out the bar-shaped little particle of long 0.7cm, diameter 0.5cm, and one layer of diatomite interleaving agent is wrapped outside particle, obtain diatom complex and change
Property particle；
（4）By code requirement mixture Petroleum Asphalt Mixture for Road Lower, then step is weighed by match ratio requirement（3）Obtained diatom
Composite modified particle, is added in the good Petroleum Asphalt Mixture for Road Lower of mixture with the speed of 12g/min, adds, add while stirring
The mix 46s under 175 DEG C of temperature conditionss again after complete, mixing speed 350r/min, that is, obtain diatom complex modified asphalt mixture.
The technology contents of the present invention are described above, but protection scope of the present invention is not limited to the content,
, can also be on the premise of present inventive concept not be departed to this hair in the knowledge that those of ordinary skill in the art possess
Bright technology contents make a variety of changes, within the spirit and principles of the invention, any modification for being made, equivalent substitution,
Improve etc., it should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. diatom complex modified asphalt mixture, it is characterised in that：The composite modified asphalt mixture is 98-99% weights The mixture of part asphalt and 1-2% parts by weight diatom complex modified particles is measured, the diatom complex modified particles are following Obtained particle is granulated in percentage by weight raw material mixing rear chamber：Diatomite 30-38%, Oak Tree composite material 16-22%, SBR powder Last 8-11%, pitch 35-40%, are granulated by pitch as granulating agent.
- 2. diatom complex modified asphalt mixture according to claim 1, it is characterised in that：The diatomite is rotary strainer algae Or small ring algae, diatom content >=75%, diatom particle diameter 10-30um, specific surface area >=25m in diatomite2/ g, water content≤5%, The g/ cm of bulk density≤0.53, pH value >=7.0, SiO2≥75%、Al2O3≤13%、Fe2O3≤5%。
- 3. diatom complex modified asphalt mixture according to claim 1, it is characterised in that：The Oak Tree composite material is Rubber presses 1 with polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion.
- 4. the diatom complex modified asphalt mixture according to claim 1 or 3, it is characterised in that：The Oak Tree composite wood The granularity of material is 40-60 mesh.
- 5. diatom complex modified asphalt mixture according to claim 1, it is characterised in that：The granularity of the SBR powder For 40-80 mesh.
- 6. diatom complex modified asphalt mixture according to claim 1, it is characterised in that：The diatom complex modification Grain is the bar-shaped little particle of long 0.5-1cm, diameter 0.3-0.6cm.
- A kind of 7. preparation method of the diatom complex modified asphalt mixture described in claim 1, it is characterised in that：Preparation process For：（1）Weigh diatomite to be put into dry vessel, be proportionally added into Oak Tree composite material, SBR powder is uniformly mixed, be heated to 60-70 DEG C, obtain composite modified diatomite；（2）Granulation pitch is taken in proportion, is heated to 100-110 DEG C, is added to step while stirring（1）Gained is composite modified In diatomite, pasty mixture material is obtained；（3）By step（2）Gained pasty mixture material is cooled to 80-100 DEG C, stirs 10-20min, stir speed (S.S.) 300-500r/ Min, makes material obtain being thoroughly mixed uniformly, is then fabricated to bar indoors, is granulated by small granulator, by making Grain program is granulated out the bar-shaped little particle of long 0.5-1cm, diameter 0.3-0.6cm, and one layer of interleaving agent is wrapped outside particle, obtains Diatom complex modified particles；（4）Asphalt is configured by code requirement, then weighs step by match ratio requirement（3）Obtained diatom complex is modified Particle, is added in the asphalt being stirred with the speed of 5-15g/min, added while stirring, again in 170-180 after adding Mix 40-50s under DEG C temperature conditionss, mixing speed 200-400r/min, that is, obtain diatom complex modified asphalt mixture.
- 8. the preparation method of diatom complex modified asphalt mixture according to claim 7, it is characterised in that：The diatom Soil is rotary strainer algae or small ring algae, diatom content >=75%, diatom pitch 10-30um, specific surface area >=25m in diatomite2/g、 The g/ cm of water content≤5%, bulk density≤0.53, pH value >=7.0, SiO2≥75%、Al2O3≤13%、Fe2O3≤5%。
- 9. the preparation method of diatom complex modified asphalt mixture according to claim 7, it is characterised in that：The Oak Tree Composite material presses 1 for rubber and polyethylene:The pulverulent material ground after the cooling of 1 weight ratio high temperature fusion, Oak Tree composite wood The granularity of material is 40-60 mesh.
- 10. the preparation method of diatom complex modified asphalt mixture according to claim 7, it is characterised in that：The SBR The granularity of powder is 40-80 mesh.
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