CN108641382A - A method of quickly preparing highly dissoluble rubber powder modified asphalt - Google Patents
A method of quickly preparing highly dissoluble rubber powder modified asphalt Download PDFInfo
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- CN108641382A CN108641382A CN201810378817.0A CN201810378817A CN108641382A CN 108641382 A CN108641382 A CN 108641382A CN 201810378817 A CN201810378817 A CN 201810378817A CN 108641382 A CN108641382 A CN 108641382A
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- rubber powder
- modified asphalt
- matrix pitch
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- highly dissoluble
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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
- 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
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention relates to a kind of methods quickly preparing highly dissoluble rubber powder modified asphalt.The method of the present invention for quickly preparing highly dissoluble rubber powder modified asphalt includes the following steps：1. 210 230 DEG C of matrix pitch I is stirred evenly with 210 230 DEG C of rubber powder；2. keeping step, 1. products obtained therefrom temperature is 210 230 DEG C, so that rubber powder is developed 4 5h in matrix pitch I, add 210 230 DEG C of matrix pitch II, 210 230 DEG C of temperature, 5000 7000RPM is kept to shear 2 3h.Highly dissoluble rubber powder modified asphalt can efficiently be prepared using the present invention of the above method, the problems such as timeliness for solving traditional dissolubility rubber powder modified asphalt preparation process is low, cost and high energy consumption, matrix pitch is easy to aging, be particularly suitable for actual engineer application.
Description
Technical field
The present invention relates to a kind of methods quickly preparing highly dissoluble rubber powder modified asphalt.
Background technology
Rubber powder is added in matrix pitch and is prepared into rubber powder modified asphalt come the technology for the technical performance for promoting asphalt material
Using for a long time, but its there are some problems.First, rubber powder and matrix pitch are thermodynamics Immiscible Polymer Blends, and rubber powder is difficult dissolving
In matrix pitch, rubber powder is caused easily to be deposited in bottom, is unfavorable for storing and transporting for a long time.Secondly, rubber powder can absorb drip
Light components in blueness and develop swelling, cause the viscosity of asphalt adhesive material-saving to increase, be unfavorable for construction and mix and stir.
Currently, high-dissolvability rubber powder modified asphalt preparation method is mainly TB (terminal blend) technique, be by
Under the high temperature conditions prepared by (220 DEG C or more) long-time high speed shear (10h or more) with pitch for rubber powder.This technique can make glue
Powder reaches the desulfurization cracking of higher degree, and solubility of the rubber powder in pitch can reach 90% or more, and rubber powder can be uniformly steady
Surely it is stored among pitch.But higher temperature and long preparation time, matrix pitch and rubber powder will appear one
The aging for determining degree affects the performance of rubber powder modified asphalt；Prolonged prepare seriously constrains production efficiency, increases
Production cost, is unfavorable in Practical Project Popularization And Development.In addition, in order to reach the desulfurization cracking function in the technique, at it
The pre- doctor treatment of rubber powder is used to realize in his dissolubility rubber powder modified asphalt preparation process.The pre- doctor treatment of rubber powder is pre- to rubber powder
First progress desulfurization cracking processing, then by treated, degradation rubber powder is mixed with matrix pitch or mildly shears dispersion again
Into matrix pitch.Matrix pitch problem of aging caused by being sheared The method avoids TB technique long-time high temperature and high speeds, together
When also achieved the purpose that make rubber powder desulfurization to crack.
The pre- doctor treatment of rubber powder is mainly the following mode at present.
(1) double helix exrusion device is used.In patent CN104830076A, rubber powder the high temperature of twice-coiled devices, high pressure,
Under the action of Strong shear, it is converted into sticky state.The shoddy of this sticky state is added in matrix pitch, adds one
Partially modified dose (SBS etc.) is prepared into a kind of stable storing, the excellent rubber powder modified asphalt of high temperature performance.
(2) the rubber powder preprocess method under liquid environment.Desulfurization cracking pretreatment is carried out to shoddy under liquid environment
Generated rubber powder problem of aging can be contacted with air to avoid rubber powder when high temperature process.In patent CN106674589A, it will give up
Rubber powder uniformly mixes by a certain percentage with waste edible oil, and stirring a period of time under the high temperature conditions, prepares desulfurization powder, so
Itself and molten condition matrix pitch are mixed with out asphalt modified with desulfurized rubber powder afterwards.
(3) rubber powder and other chemical raw materials are subjected to processing granulation, are then added in asphalt by dry mixing method.
In patent CN107200986A, by grafting gutta-percha, oil, sulphur, ethyl vinyl acetate-ethylene copolymer, polyethylene, antioxygen
The chemical raw materials such as agent carry out granulation processing, are then added in asphalt in the form of dry mixing.
Rubber powder preprocess method avoids matrix pitch aging, while improving the degree of rubber powder desulfurization cracking so that glue
Powder can be good at being merged with pitch, but either any pre- sulfur method, that all there is production costs is higher,
The problems such as process is more limits popularization and application.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that following technical solution：
The present invention provides a kind of method quickly preparing highly dissoluble rubber powder modified asphalt, the quick preparation height dissolving
The method of property rubber powder modified asphalt includes the following steps：
1. 210-230 DEG C of matrix pitch I is stirred evenly with 210-230 DEG C of rubber powder；
2. keeping step, 1. products obtained therefrom temperature is 210-230 DEG C, rubber powder is made to develop 4-5h in matrix pitch I, then
210-230 DEG C of matrix pitch II is added, 210-230 DEG C of temperature, 5000-7000RPM is kept to shear 2-3h.
The present invention be preferably the step 1. in rubber powder in volume≤30%.
The present invention be preferably the step 2. in be added matrix pitch II after rubber powder a concentration of step 1. mesostroma drip
Blueness I stirs evenly the half of rear rubber powder concentration with rubber powder.
The present invention has the beneficial effect that：
The present invention, which takes into account, to be considered traditional dissolubility rubber powder modified asphalt and prepares mesostroma ageing of asphalt and rubber powder solubility
The problem of, reduce the aging of matrix pitch to the maximum extent while preparing highly dissoluble rubber powder modified asphalt, and then propose
A method of efficient, economical prepares highly dissoluble rubber powder modified asphalt.This method prepares a concentration of 2n of rubber powder first, and (n is
In final rubber powder modified asphalt rubber powder in mix mass fraction) rubber powder modified asphalt, developed under high temperature, closed environment,
Rubber powder adequately can be developed and be swollen in this process, and it (is mainly-S- that key is learned in the lower crosslinking of some bond energys in rubber powder
S- and-C-S-) fracture is will produce, and the higher chemical bond of bond energy can become hyperactive, then again by the matrix of certain mass
Pitch is added thereto, and it is n to make final rubber powder volume, and then high speed shear for a period of time, obtains under identical temperature condition
Highly dissoluble rubber powder modified asphalt.Highly dissoluble rubber powder modified asphalt can efficiently be prepared using the present invention of the above method,
The timeliness for solving traditional dissolubility rubber powder modified asphalt preparation process is low, cost and high energy consumption, and matrix pitch is easy to aging etc. asks
Topic, is particularly suitable for actual engineer application.
Description of the drawings
5 width of attached drawing of the present invention,
Fig. 1 is the process flow chart that highly dissoluble rubber powder modified asphalt is quickly prepared described in embodiment 1；
Fig. 2 is the structural schematic diagram of raw rubber described in embodiment 1；
Fig. 3 is the structural schematic diagram of vulcanizate described in embodiment 1；
Fig. 4 is the phase structure schematic diagram of existing rubber powder modified asphalt described in embodiment 1；
Fig. 5 is the phase structure schematic diagram of dissolubility rubber powder modified asphalt described in embodiment 1.
Specific implementation mode
Following non-limiting embodiments can make those skilled in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Embodiment 1
A method of highly dissoluble rubber powder modified asphalt is quickly prepared, it is described quickly to prepare the drip of highly dissoluble rubber powder modified
Green method includes the following steps：
1. 220 DEG C of matrix pitch I is will warm up to stir evenly with the rubber powder for being heated to 220 DEG C, the rubber powder
Inside volume≤30%；
2. keeping step, 1. products obtained therefrom temperature is 220 DEG C, so that rubber powder is developed 4h in matrix pitch I, add and add
The matrix pitch II of heat to 220 DEG C makes a concentration of step of rubber powder after addition matrix pitch II 1. mesostroma pitch I and rubber
Powder stirs evenly the half of rear rubber powder concentration, and 220 DEG C of temperature, 5000RPM is kept to shear 2h.
The main component of rubber powder described in the present embodiment 1 is natural rubber, synthetic rubber, carbon black and ash content, wherein rubber
Glue ingredient forms the primary structure of rubber after vulcanizing treatment, as shown in Fig. 2, the raw rubber structure before uncured is in line
Property macromolecular shape, length is 50,000 times or so of diameter.In order to promote the performance of rubber, vulcanizing treatment usually can be all carried out,
As shown in figure 3, by the crosslinked action of element sulphur, it has been cross-linked to form space net structure between rubber linear macromolecule, has been crosslinked
Key is divided into monosulfidic bond-S-, cystine linkage-S-S- and polysulfide bond-(S)n-.In the process, rubber powder is because absorbing matrix pitch
In light components and carried out abundant swelling and development；Simultaneously under 220 DEG C of hot conditions, some bond energys in rubber powder compared with
Low cross-linking key (mainly S-S, C-S key) produces fracture, and a large amount of cracking is generated so as to cause rubber powder.Due to being crosslinked in rubber powder
The fracture of key, a part of space net structure in rubber powder form some macromolecular chains.
In growth course of the rubber powder modified asphalt up to 4h, more serious problem of aging is produced, is mainly manifested in
The volatilization of light components in matrix pitch, colloid are converted into the aging of asphalitine and rubber powder.When the rubber powder desulfurization in mother liquor is split
Xie Hou, then suitable matrix pitch is added thereto can be alleviated and be generated in long-time high temperature growth course to a certain extent
Problem of aging.The rubber powder concentration of rubber powder is larger in mother liquor so that the viscosity of rubber powder modified asphalt mother liquor increases, and is unfavorable for construction and mixes
With.After matrix pitch is added, the concentration of rubber powder can be reduced, the rheological property of rubber powder modified asphalt is enhanced.
Finally, as shown in figure 4, in the phase structure of existing rubber powder modified asphalt, rubber powder granule absorbs matrix pitch
In light components (mainly saturation point and fragrance point) after be swollen, volume increases, and the structure of rubber powder granule becomes thin
Pine expansion.The reason for this is that traditional rubber powder modified asphalt preparation process temperature is relatively low, generally 190 DEG C or so, and deficiency is sheared,
Rubber powder is caused still to maintain script configuration state because of reaction condition deficiency.As shown in figure 5, in the effect of high temperature and high speed shearing
Under, rubber powder granule, which is sheared, is dispersed into more tiny particle, and on the other hand, the cross-bond of rubber powder is in high temperature and high speed shear action
Lower fracture, forms polarity big molecule side chain, the polarity macromolecular straight chain of each rubber powder granule under the action of shear-mixed with
The polarity macromolecular straight chain overlap joint of other rubber powder granules is coupled, and forms a spacial framework so that entire disperse system
Structure is more stablized, and the performance of rubber powder modified asphalt is enhanced.
Claims (3)
1. a kind of method quickly preparing highly dissoluble rubber powder modified asphalt, it is characterised in that：It is described quickly to prepare highly dissoluble
The method of rubber powder modified asphalt includes the following steps：
1. 210-230 DEG C of matrix pitch I is stirred evenly with 210-230 DEG C of rubber powder；
2. keeping step, 1. products obtained therefrom temperature is 210-230 DEG C, so that rubber powder is developed 4-5h in matrix pitch I, add
210-230 DEG C of matrix pitch II keeps 210-230 DEG C of temperature, 5000-7000RPM to shear 2-3h.
2. the method for quickly preparing highly dissoluble rubber powder modified asphalt according to claim 1, it is characterised in that：The step
1. volume≤30% in middle rubber powder.
3. the method for quickly preparing highly dissoluble rubber powder modified asphalt according to claim 2, it is characterised in that：The step
2. 1. mesostroma pitch I stirs evenly rear rubber powder concentration to a concentration of step of rubber powder with rubber powder after addition matrix pitch II in
Half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378817.0A CN108641382A (en) | 2018-04-25 | 2018-04-25 | A method of quickly preparing highly dissoluble rubber powder modified asphalt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378817.0A CN108641382A (en) | 2018-04-25 | 2018-04-25 | A method of quickly preparing highly dissoluble rubber powder modified asphalt |
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| Publication Number | Publication Date |
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| CN108641382A true CN108641382A (en) | 2018-10-12 |
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ID=63747557
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| CN201810378817.0A Pending CN108641382A (en) | 2018-04-25 | 2018-04-25 | A method of quickly preparing highly dissoluble rubber powder modified asphalt |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079105A (en) * | 2019-04-26 | 2019-08-02 | 同济大学 | A kind of sepiolite supported dissolubility rubber powder modified asphalt and preparation method thereof |
| CN110079106A (en) * | 2019-04-26 | 2019-08-02 | 同济大学 | A kind of dissolubility rubber powder modified asphalt of high-storage stability |
| CN110746788A (en) * | 2019-11-08 | 2020-02-04 | 同济大学 | High-solubility rubber powder modified asphalt and preparation method thereof |
| CN111073320A (en) * | 2019-12-30 | 2020-04-28 | 海南天然橡胶产业集团股份有限公司 | Natural rubber modified asphalt and preparation method thereof |
| CN114015244A (en) * | 2021-09-30 | 2022-02-08 | 中交第四公路工程局有限公司 | High-performance rubber asphalt and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038264A (en) * | 2015-06-29 | 2015-11-11 | 天津海泰环保科技发展有限公司 | Preparation method of high-doping ratio rubber powder modified asphalt composition |
-
2018
- 2018-04-25 CN CN201810378817.0A patent/CN108641382A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038264A (en) * | 2015-06-29 | 2015-11-11 | 天津海泰环保科技发展有限公司 | Preparation method of high-doping ratio rubber powder modified asphalt composition |
Non-Patent Citations (1)
| Title |
|---|
| 董瑞琨: ""高温裂解胶粉改性沥青的低温性能试验"", 《中国公路学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079105A (en) * | 2019-04-26 | 2019-08-02 | 同济大学 | A kind of sepiolite supported dissolubility rubber powder modified asphalt and preparation method thereof |
| CN110079106A (en) * | 2019-04-26 | 2019-08-02 | 同济大学 | A kind of dissolubility rubber powder modified asphalt of high-storage stability |
| CN110746788A (en) * | 2019-11-08 | 2020-02-04 | 同济大学 | High-solubility rubber powder modified asphalt and preparation method thereof |
| CN111073320A (en) * | 2019-12-30 | 2020-04-28 | 海南天然橡胶产业集团股份有限公司 | Natural rubber modified asphalt and preparation method thereof |
| CN114015244A (en) * | 2021-09-30 | 2022-02-08 | 中交第四公路工程局有限公司 | High-performance rubber asphalt and preparation method thereof |
| CN114015244B (en) * | 2021-09-30 | 2022-09-16 | 中交第四公路工程局有限公司 | High-performance rubber asphalt and preparation method thereof |
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Application publication date: 20181012 |
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