CN108342090A - Diatom test asphalt modifier and its modified composite asphalt and preparation process - Google Patents
Diatom test asphalt modifier and its modified composite asphalt and preparation process Download PDFInfo
- Publication number
- CN108342090A CN108342090A CN201711399180.5A CN201711399180A CN108342090A CN 108342090 A CN108342090 A CN 108342090A CN 201711399180 A CN201711399180 A CN 201711399180A CN 108342090 A CN108342090 A CN 108342090A
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- China
- Prior art keywords
- diatom test
- parts
- asphalt
- pitch
- test composite
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Classifications
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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
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
Abstract
The present invention relates to a kind of diatom test asphalt modifiers and its modified composite asphalt and preparation process, diatom test composite asphalt modifier to be prepared by the component of following parts by weight：0~5 part of 5~20 parts of diatom test, 10~25 parts of shoddy, Petropols or low grade pitch, 0~3 part of stabilizer.Diatom test composite modified asphalt and preparation process is also disclosed in the present invention.Diatom test composite asphalt modifier improves high-temperature behavior, cryogenic property, anti-fatigue performance and the water stabilizing of asphalt, and modified pitch has good hot storage stability and low-temperature cracking-resistance, extends service life of road surface.Meanwhile the expensive SBS in part is replaced with cheap diatom test, pavement performance is compared exclusive use SBS modified pitch and is improved, and reduces the cost of modified pitch.
Description
Technical field
The invention belongs to field of asphalt modification, it is related to a kind of modified pitch and preparation method thereof, and in particular to a kind of diatom
Shell asphalt modifier and its modified composite asphalt and preparation process.
Background technology
SBS modified pitch is greatly promoted and applied because it is with excellent pavement performance in China's asphalt modification.
But SBS itself is a kind of polymer, with matrix pitch in molecular weight.The parameters such as density, solubility and other physicochemical properties
There is larger difference in aspect, thus the compatibility of the two is poor, causes SBS modified pitch high temperature storage stability poor, hold
Laminated segregation phenomenon easily occurs, has seriously affected modified effect, construction quality and the pavement performance of modified pitch.SBS valences simultaneously
Rising steadily for lattice, causes construction cost to increase.
Diatom is a kind of unicellular alga, and Individual Size is generally micron order or grade, the body after diatom death
It is deposited in ocean or lake, just forms diatomite in the course of time.Diatomite main component be silica and a small amount of aluminium,
Iron, calcium, magnesium, sodium, potassium etc., diatomite have density small, and porosity is high, and large specific surface area, absorption property is good, acid and alkali-resistance insulation
The features such as, diatomite rich reserves, are widely used in fields such as environment, petrochemical industries in addition.
Diatomite modified asphalt obtains extensive concern and research with its excellent pavement performance in field of asphalt modification at present,
Researcher has also applied for related patents, but correlative study is mainly that diatomite directly applies to asphalt modification without any processing
In, diatomite own characteristic is so no that utilize to the limit in asphalt modification.
The present invention carries out calcination to diatomite using focused high-energy-density pulse laser beam and handles to obtain nano silicone frustule
Particle is added in asphalt pavement material, can significantly improve the high-temperature behavior, cryogenic property, fatigue resistance of asphalt
Energy and water stabilizing, prolonging service life of pavement.The addition of diatom test changes the colloform texture of SBS modified pitch, carries
The high high-temperature stability of mixture.Fatigue life under each stress level of diatom test SBS composite modified asphalt mixtures is high
In conventional SBS modified asphalt mixture.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide diatom test asphalt modifiers
And its it is modified composite asphalt and preparation process.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of diatom test composite asphalt modifier, includes the component of following parts by weight：5~20 parts of diatom test, shoddy 10
~25 parts, 0~5 part of Petropols or low grade pitch, 0~3 part of stabilizer.
Diatom test, shoddy, Petropols or low grade pitch, stabilizer are weighed by weight；Above-mentioned component is mixed
It is squeezed out by screw extruder low temperature after uniformly, diatom test composite asphalt modifier is made in shear granulation.
The diatom test be diatomite in full of oxygen state, line focus high-energy-density pulse laser beam carry out calcination at
It is obtained after reason, focused high-energy-density pulse laser beam is femtosecond, laser frequency 1k~10Mhz, 0.01 μ J of pulsed laser energy
~1mJ, laser scanning speed 0.1mm/s~10mm/s, spacing 0.001mm~0.1mm.
The shoddy is that main component is the waste tire of natural rubber, butadiene rubber, butadiene-styrene rubber or butyl rubber
It is obtained after broken, 20~100 mesh of rubber powder particle size range.
The stabilizer is made by the raw material of following parts by weight：20~50 parts of repefral, styrene 10~
30 parts, 10~40 parts of petroleum sodium sulfonate, 5~20 parts of cyclic acid anhydride；
The present invention also provides a kind of diatom test composite modified asphalts and preparation process, specific implementation step to include：
(1) 80~90 parts of matrix pitch, 5~20 parts of diatom test composite asphalt modifier, SBS0~6 are weighed by weight
Part, 0~7 part of lightweight oil, the sum of each component number is 100 parts.
(2) step (1) mesostroma pitch is placed in high-speed shearing machine and is heated to 150 DEG C~180 DEG C, pitch is flowed in melting
Dynamic state, diatom test composite asphalt modifier and SBS are added in pitch after mixing, are stirring evenly and then adding into light oil
Point, keep 160 DEG C~180 DEG C of temperature to mixture 30~50min of high speed shear, shearing rotating speed 3000r/min~4000r/
min；40~60min of stirring development on the dispersant, is added stabilizer, stirs evenly and obtain diatom test composite modified asphalt.
The matrix pitch is 50#~90# pitches, 25 DEG C of needle penetration 50dmm~120dmm, 30 DEG C~60 DEG C of softening point.
The SBS is the SBS1301-1 (YH-791H) of Yueyang Ba Ling companies production, thermoplastic elastomer (TPE) polystyrene-poly
Butadiene-polystyrene triblock copolymer, molecular weight 5~60,000, styrene mass content 28%, structure type is line style, embedding
Section is 30/70 than S/B；
Compared with prior art, the present invention has the following advantages：
(1) present invention is handled diatomite using focused high-energy-density pulsed laser technique, and diatomite is through laser burn
Evenly, the diatom test granular size being prepared is nanoscale to grain size smaller, and particle internal microcellular structure is more after burning processing
Diversification, porosity higher increase the specific surface area of diatom test particle, enhance stability and activity.
(2) addition of diatom test changes the colloform texture of SBS modified pitch so that the viscosity of asphalt from asphalt mixture
Become larger, to improve the high-temperature stability of mixture；In addition, transition metal element cation in diatom test in pitch
Polar functional group, which reacts, generates co-ordination complex, activating oxide Na2O and K2The presence of O has conducive to diatom test and asphaltogenic acid
Acid-base reaction occurs with asphaltous acid anhydrides, improves the temperature sensitivity of SBS modified pitch, diatom test specific surface area is larger in addition,
The adhesiveness gathered materials between asphalt mastic is improved, mixture globality improves.In addition with SBS modified asphalt concrete phases
Than the fatigue life under each stress level of diatom test SBS composite modified asphalt mixtures is above conventional SBS modified asphalt mixing
The increase rate of material, fatigue life has good fatigue resistance up to 50%.
(3) specific surface area of diatom test is larger, strong to the adsorption capacity of pitch, increases composite modified asphalt mixture
Asphalt filmthickness, mixture flexibility improves, and diatom test rough, and there are many particles of protrusion, and form gap hole,
The endoporus gap structure of active adsorption capacity is conducive to asphaltene molecule entrance, under external force, the gap inside diatom test
Cushioning effect is played to free pitch, the pitch oil film inside mixture is made to be in more stable state.The addition of diatom test
Adhesiveness and bond stress between asphalt and aggregate are improved, the dislocation and sliding between structure pitch and aggregate particle are overcome,
By particle generate simple stress be transferred on other matrixes, while evenly dispersed diatomite split sharp place play anchoring and
Bridge joint acts on, and delays the generation in crack, constrains the extension of crackle, increases the globality of bituminous concrete.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
A kind of diatom test composite asphalt modifier, includes the component of following parts by weight：15 parts of diatom test, 15 parts of shoddy,
2 parts of Petropols or low grade pitch, 1 part of stabilizer.
The diatom test be diatomite in full of oxygen state, line focus high-energy-density pulse laser beam carry out calcination at
It is obtained after reason, focused high-energy-density pulse laser beam is femtosecond, laser frequency 1k~10Mhz, 0.01 μ J of pulsed laser energy
~1mJ, laser scanning speed 0.1mm/s~10mm/s, spacing 0.001mm~0.1mm.
The shoddy is that main component is the waste tire of natural rubber, butadiene rubber, butadiene-styrene rubber or butyl rubber
It is obtained after broken, 20~100 mesh of rubber powder particle size range.
The stabilizer is made by the raw material of following parts by weight：20~50 parts of repefral, styrene 10~
30 parts, 10~40 parts of petroleum sodium sulfonate, 5~20 parts of cyclic acid anhydride；
Embodiment 2
A kind of diatom test composite asphalt modifier, includes the component of following parts by weight：10 parts of diatom test, 20 parts of shoddy,
2 parts of Petropols or low grade pitch, 1 part of stabilizer.
The diatom test be diatomite in full of oxygen state, line focus high-energy-density pulse laser beam carry out calcination at
It is obtained after reason, focused high-energy-density pulse laser beam is femtosecond, laser frequency 1k~10Mhz, 0.01 μ J of pulsed laser energy
~1mJ, laser scanning speed 0.1mm/s~10mm/s, spacing 0.001mm~0.1mm.
The shoddy is that main component is the waste tire of natural rubber, butadiene rubber, butadiene-styrene rubber or butyl rubber
It is obtained after broken, 20~100 mesh of rubber powder particle size range.
The stabilizer is made by the raw material of following parts by weight：20~50 parts of repefral, styrene 10~
30 parts, 10~40 parts of petroleum sodium sulfonate, 5~20 parts of cyclic acid anhydride；
Embodiment 3
The present invention provides a kind of diatom test composite modified asphalt and its preparation processes, which is characterized in that described to prepare silicon
Frustule composite modified asphalt the specific steps are：
(1) 2 parts of 15 parts of diatom test, 15 parts of shoddy, Petropols or low grade pitch, stabilizer 1 are weighed by weight
Part；Above-mentioned component is squeezed out by screw extruder low temperature after mixing, shear granulation is made diatom test composite asphalt and is modified
Agent.
(2) 82 parts of matrix pitch, 8 parts of diatom test composite asphalt modifier, 5 parts of SBS, lightweight oil 5 are weighed by weight
Part.
(3) step (2) mesostroma pitch is placed in high-speed shearing machine and is heated to 150 DEG C~180 DEG C, pitch is flowed in melting
Dynamic state, diatom test composite asphalt modifier and SBS are added in pitch after mixing, are stirring evenly and then adding into light oil
Point, keep 160 DEG C~180 DEG C of temperature to mixture high speed shear 45min, shearing rotating speed 4000r/min；It stirs on the dispersant
50min is developed, stabilizer is added, stirs evenly and obtains diatom test composite modified asphalt.
The diatom test be diatomite in full of oxygen state, line focus high-energy-density pulse laser beam carry out calcination at
It is obtained after reason, focused high-energy-density pulse laser beam is femtosecond, laser frequency 1k~10Mhz, 0.01 μ J of pulsed laser energy
~1mJ, laser scanning speed 0.1mm/s~10mm/s, spacing 0.001mm~0.1mm.
The shoddy is that main component is the waste tire of natural rubber, butadiene rubber, butadiene-styrene rubber or butyl rubber
It is obtained after broken, 20~100 mesh of rubber powder particle size range.
The stabilizer is made by the raw material of following parts by weight：20~50 parts of repefral, styrene 10~
30 parts, 10~40 parts of petroleum sodium sulfonate, 5~20 parts of cyclic acid anhydride；
The matrix pitch is 50#~90# pitches, 25 DEG C of needle penetration 50dmm~120dmm, 30 DEG C~60 DEG C of softening point.
The SBS is the SBS1301-1 (YH-791H) of Yueyang Ba Ling companies production, thermoplastic elastomer (TPE) polystyrene-poly
Butadiene-polystyrene triblock copolymer, molecular weight 5~60,000, styrene mass content 28%, structure type is line style, embedding
Section is 30/70 than S/B；
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Protection domain it.
Claims (9)
1. a kind of diatom test composite asphalt modifier, which is characterized in that diatom test composite asphalt modifier includes following parts by weight
Component：0~5 part of 5~20 parts of diatom test, 10~25 parts of shoddy, Petropols or low grade pitch, 0~3 part of stabilizer.
2. a kind of diatom test composite asphalt modifier according to claim 1, which is characterized in that diatom test composite asphalt changes
Property agent is made by the component of following weight parts：10~15 parts of diatom test, 15~20 parts of shoddy, Petropols or low grade pitch
1~3 part, 1~2 part of stabilizer.
3. a kind of diatom test composite asphalt modifier according to claim 1,2, which is characterized in that the diatom test is silicon
Diatomaceous earth is in full of oxygen state, and line focus high-energy-density pulse laser beam obtains after carrying out calcination processing, focused high-energy-density
Pulse laser beam is femtosecond, laser frequency 1k~10Mhz, 0.01 μ J~1mJ of pulsed laser energy, laser scanning speed
0.1mm/s~10mm/s, spacing 0.001mm~0.1mm.
4. a kind of diatom test composite asphalt modifier according to claim 1,2, which is characterized in that the shoddy is,
Main component is that the waste tire of natural rubber, butadiene rubber, butadiene-styrene rubber or butyl rubber obtains after broken, rubber powder grain
Spend 20~100 mesh of range.
5. a kind of diatom test composite asphalt modifier according to claim 1,2, which is characterized in that the stabilizer by with
The raw material of lower parts by weight is made：20~50 parts of repefral, 10~30 parts of styrene, petroleum sodium sulfonate 10~40
Part, 5~20 parts of cyclic acid anhydride.
6. a kind of diatom test composite modified asphalt, which is characterized in that modified pitch is made of the component of following weight parts：Matrix drips
It is 80~90 parts green, 5~20 parts of diatom test composite asphalt modifier according to any one of claims 1 to 5,0~6 part of SBS,
0~7 part of lightweight oil, the sum of each component number are 100 parts.
7. a kind of diatom test composite modified asphalt according to claim 6, which is characterized in that the matrix pitch is 50#
~90# pitches, 25 DEG C of needle penetration 50dmm~120dmm, 30 DEG C~60 DEG C of softening point.
8. a kind of diatom test composite modified asphalt according to claim 6, which is characterized in that the SBS is Yueyang Ba Ling
The SBS1301-1 (YH-791H) of company's production, thermoplastic elastomer (TPE) polystyrene-polybutadiene-polystyrene triblock copolymer
Object, molecular weight 5~60,000, styrene mass content 28%, structure type are line style, and block ratio S/B is 30/70.
9. a kind of diatom test composite modified asphalt according to claim 6, which is characterized in that described to prepare diatom test compound
Modified pitch the specific steps are：
(1) 1~3 part of 10~15 parts of diatom test, 15~20 parts of shoddy, Petropols or low grade pitch are weighed by weight,
1~2 part of stabilizer；Above-mentioned component is squeezed out by screw extruder low temperature after mixing, it is multiple that diatom test is made in shear granulation
Close asphalt modifier.
(2) 80~90 parts of matrix pitch is weighed by weight, 5~20 parts of diatom test composite asphalt modifier, SBS0~6 part, gently
0~7 part of matter oil, the sum of each component number are 100 parts.
(3) step (2) mesostroma pitch is placed in high-speed shearing machine and is heated to 150 DEG C~180 DEG C, pitch is in melt-flow shape
Diatom test composite asphalt modifier and SBS are added in pitch by state after mixing, are stirring evenly and then adding into lightweight oil,
Keep 160 DEG C~180 DEG C of temperature to mixture 30~50min of high speed shear, shearing rotating speed 3000r/min~4000r/min；
40~60min of stirring development, is added stabilizer, stirs evenly and obtain diatom test composite modified asphalt on dispersant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399180.5A CN108342090A (en) | 2017-12-20 | 2017-12-20 | Diatom test asphalt modifier and its modified composite asphalt and preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399180.5A CN108342090A (en) | 2017-12-20 | 2017-12-20 | Diatom test asphalt modifier and its modified composite asphalt and preparation process |
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| CN108342090A true CN108342090A (en) | 2018-07-31 |
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|---|---|---|---|
| CN201711399180.5A Pending CN108342090A (en) | 2017-12-20 | 2017-12-20 | Diatom test asphalt modifier and its modified composite asphalt and preparation process |
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Cited By (3)
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| CN109337388A (en) * | 2018-09-04 | 2019-02-15 | 河南万里路桥工程有限公司 | A kind of nano-rubber powder-modified asphalt |
| CN109486220A (en) * | 2018-10-31 | 2019-03-19 | 广西交通职业技术学院 | A kind of tripolite compound is with manganese slag modified pitch and preparation method thereof |
| CN115140964A (en) * | 2022-07-26 | 2022-10-04 | 上海浦东建设股份有限公司 | Color asphalt mixture and preparation method thereof |
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