CN109988431A - A kind of medium temperature modified asphalt mixture additive and its preparation and application - Google Patents
A kind of medium temperature modified asphalt mixture additive and its preparation and application Download PDFInfo
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- CN109988431A CN109988431A CN201910155697.2A CN201910155697A CN109988431A CN 109988431 A CN109988431 A CN 109988431A CN 201910155697 A CN201910155697 A CN 201910155697A CN 109988431 A CN109988431 A CN 109988431A
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- asphalt mixture
- modified asphalt
- medium temperature
- mixture additive
- temperature modified
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Working-Up Tar And Pitch (AREA)
- Road Paving Structures (AREA)
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Abstract
The present invention relates to a kind of medium temperature modified asphalt mixture additives, preparation method is that stearic acid and reacting ethylenediamine are generated aliphatic amide, by the aliphatic acid amide and polyolefin, surfactant, antioxidant of generation in 160-180 DEG C of hybrid reaction, and granulating and forming obtains medium temperature modified asphalt mixture additive.Medium temperature modified asphalt mixture additive provided by the invention have it is cheap, stability at high temperature of asphalt mixture, low-temperature cracking-resistance, water resistant can be significantly improved when additive amount is 3wt% damage the pavement performances such as performance, prolonging service life of pavement, dynamic stability is above par, preparation process is simple, it is easily operated, and temperature and compacting temperature are mixed and stirred when can significantly reduce bitumen construction.
Description
Technical field
The present invention relates to road asphalt technical field, more particularly to a kind of medium temperature modified asphalt mixture additive and its
Preparation and application.
Background technique
Matrix pitch is to add the basic asphalt that asphalt modifier is modified for producing modified pitch.If it is benefit
With petroleum through asphalt obtained from exploitation refining processing, that is, matrix asphalt, e.g., No. 70 pitches, work progress
Asphalt is mixed to form with gathering materials after middle heating.In construction, No. 70 asphalt heating temperatures are 155~165 °C.Pitch is long
The time continuous aging of heating meeting, starts aging when temperature has reached 100 °C.
Under the conditions of super, heavy load, high-temperature behavior is insufficient, and mixture modulus is inadequate for traditional modified asphalt material at present,
Track cannot be solved the problems, such as very well, and toughness is insufficient, recoverable force ability is low, and application structure and field are limited.Current pitch
Modifying agent mostly uses greatly natural or artificial synthesized organic or inorganic material, although having one in the using effect for improving bituminous pavement
It is set for using, but not breakthrough progress.But many disadvantages are still had, for example, having a single function, not energy saving, drip
Green, mineral aggregate still needs to be warmed to 160-190 °C, and process of deployment bitumen concrete needs to keep rapid shaping under 160 °C or more states；
Road construction cost is not effectively reduced, improves road pavement cost instead to a certain extent；Do not accomplish that dirt is greatly reduced
Dye reduces carbon emission；Noise reduction effect is unobvious；To the mineral aggregate bad adaptability etc. of different rock matter.Traditional modified asphalt material is deposited
With the compatibility of pitch, easy to aging, storage stability, reheating, price is high, expends the problems such as petroleum resources.Especially
For modified pitch to temperature requirement height, the mix link that paves is not easy to control, is easy to appear early disease, as Moisture Damage, track damage,
Crack etc..
In prior art, the country is SBS and PE using most asphalt modifiers, but the two is when in use not
It is easily compatible with pitch, special shearing equipment and higher energy consumption are needed, and construction workability is poor, generated when construction very much
Useless cigarette, exhaust gas, cause environmental pollution, endanger operator's health, while cooling velocity is slow, extend the time that is open to traffic, right
Transport development is totally unfavorable.
Summary of the invention
In view of the deficienciess of the prior art, a kind of medium temperature modified asphalt mixture additive (SA) is provided, with pitch
With very high compatibility, asphalt performance can be significantly improved, there is good stability, softening point is high, needle penetration is low, Er Qieneng
Significantly reduce matrix pitch mixes and stirs temperature and compacting temperature.
A kind of medium temperature modified asphalt mixture additive, which is characterized in that including following component: 20 ~ 40 parts of polyolefin, 40
~ 60 parts of aliphatic amides, 20 ~ 30 parts of surfactants, 5~10 parts of antioxidants；
The number is parts by weight.
Preferably, the polyolefin is ethene polymers, and weight average molecular weight is 4000 ~ 6000.
Preferably, the aliphatic amide the preparation method comprises the following steps: by stearic acid put into reaction kettle in, heating fusing, rise
Then temperature is added catalyst, the by-product water of generation and low boilers is passed through water segregator point to 140 ± 5 DEG C of addition ethylenediamines
Out, reaction temperature maintains 140~160 DEG C, and when no longer containing ethylenediamine in the water separated, reaction terminating discharges while hot
Aliphatic amide.
Preferably, the additional amount of the ethylenediamine and stearic mass ratio are 1.5:1.
Preferably, the catalyst is one of 12 silico-tungstic acids, phosphoric acid, methyl acetate.
A kind of preparation method of medium temperature modified asphalt mixture additive, is obtained by following steps:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) aliphatic amide prepared in step (1) and polyolefin, surfactant, antioxidant are allowed at 160-180 DEG C
It is sufficiently mixed reaction, and granulating and forming.
A kind of application method of medium temperature modified asphalt mixture additive is added by wet process or dry method；
The wet process, which is added to, to be added to medium temperature modifying agent in pitch and stirs evenly at a temperature of 150 ~ 160 DEG C, stirring
Time 30~60 minutes；
The dry method is added at a temperature of 150 ~ 160 DEG C that medium temperature modified asphalt mixture additive is strictly primary in proportion
Property investment mix cylinder and mixture and stir, mixing time 40~60 seconds.
Preferably, the quality of the medium temperature modified asphalt mixture additive is the 1 ~ 5% of asphalt quality；It is preferred that 3%.
This patent reaches the mechanism of effect: this product is very easily to be dissolved in satisfying in pitch at a terrific speed
In part, the component of pitch specifically includes that straight chain and branched aliphatic hydro carbons, alkyl naphthene and some waxes and non-wax
Saturate, the main reason for presence of these substances exactly influences asphalt high-temperature stability.The medium temperature of this patent preparation is modified
Asphalt mixture additive adsorbs at high temperature and dissolves these saturates, forms stable solution without isolating.Due in
Warm modified asphalt mixture additive fusing point with higher, thus the high-temperature stability of pitch is effectively raised, it influences to drip
Polar molecule in the mainly pitch of green cryogenic property, these substances are not sent out with medium temperature modified asphalt mixture additive
Raw direct effect, thus will not influence the cryogenic property of pitch.
Beneficial effect
Medium temperature modified asphalt mixture additive provided by the invention have it is cheap, asphalt height can be significantly improved
Temperature stability, low-temperature cracking-resistance, the water resistant damage pavement performances such as performance, prolonging service life of pavement, dynamic stability standard with
On, preparation process is simple, easily operated, and mixes and stirs temperature and compacting temperature when can significantly reduce bitumen construction.
Specific embodiment:
It elaborates below to the embodiment of the present invention, the present embodiment carries out reality under the premise of the technical scheme of the present invention
It applies, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following embodiments.
In following embodiment, the number is parts by weight.
Embodiment 1:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) 50 parts of the aliphatic amide and 20 parts of polyolefin, 25 parts of surfactant, 5 parts of antioxidant that will be prepared in step (1)
It is allowed to be sufficiently mixed reaction, and granulating and forming at 160-180 DEG C.
Medium temperature modified asphalt mixture additive is added in No. 70 pitches at a temperature of 150 ~ 160 DEG C and is stirred
Even, mixing time 30~60 minutes, the additive amount in pitch of medium temperature modified asphalt mixture additive was 3%, when laying road
Compacting temperature be 150 DEG C.
Embodiment 2:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) 40 parts of the aliphatic amide and 30 parts of polyolefin, 20 parts of surfactant, antioxidant 10 that will be prepared in step (1)
Part is allowed to be sufficiently mixed reaction, and granulating and forming at 160-180 DEG C.
Medium temperature modified asphalt mixture additive and No. 70 pitches are disposably put into and mixed in cylinder at a temperature of 150 ~ 160 DEG C
It is mixed, mixing time 40~60 seconds；The additive amount in pitch of medium temperature modified asphalt mixture additive is 3%；It is laid with road
Compacting temperature when road is 140 DEG C.
Embodiment 3:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) 60 parts of the aliphatic amide and 20 parts of polyolefin, 20 parts of surfactant, 5 parts of antioxidant that will be prepared in step (1)
It is allowed to be sufficiently mixed reaction, and granulating and forming at 160-180 DEG C.
Medium temperature modified asphalt mixture additive and AC-16-1 pitch are disposably put at a temperature of 150 ~ 160 DEG C and mixed
It is mixed in cylinder, mixing time 40~60 seconds；The additive amount in pitch of medium temperature modified asphalt mixture additive is 3%；Paving
If compacting temperature when road is 130 DEG C.
Embodiment 4:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) 50 parts of the aliphatic amide and 20 parts of polyolefin, 25 parts of surfactant, 5 parts of antioxidant that will be prepared in step (1)
It is allowed to be sufficiently mixed reaction, and granulating and forming at 160-180 DEG C.
Medium temperature modified asphalt mixture additive and SMA-16 pitch are disposably put at a temperature of 150 ~ 160 DEG C and mix cylinder
Middle mixing, mixing time 40~60 seconds；The additive amount in pitch of medium temperature modified asphalt mixture additive is 3%, is laid with
Compacting temperature when road is 120 DEG C.
The bituminous pavement that the medium temperature modified asphalt mixture additive (SA) that above-described embodiment 2 ~ 4 obtains is modified into
Row detection, the result is as follows:
1 embodiment of table, 2 medium temperature modified asphalt mixture additive (SA) is to the road parameters after No. 70 asphalt modifications
The 2 medium temperature modified asphalt mixture additive of embodiment 3 and 4 (SA) of table is to the road after AC-16-I and SMA-16 asphalt modification
Road parameter
It can be seen that the high-temperature stable of pitch after medium temperature modified asphalt mixture additive is added from These parameters Comprehensive Correlation
Property, low-temperature cracking-resistance, water resistant the damage pavement performances such as performance significantly improve, service life of road surface extends, and anti-rut behavior is obvious
Temperature and compacting temperature are mixed and stirred when being promoted and bitumen construction can be significantly reduced.
Claims (9)
1. a kind of medium temperature modified asphalt mixture additive, which is characterized in that including following component: 20 ~ 40 parts of polyolefin, 40 ~
60 parts of aliphatic amides, 20 ~ 30 parts of surfactants, 5~10 parts of antioxidants；
The number is parts by weight.
2. medium temperature modified asphalt mixture additive according to claim 1, which is characterized in that the polyolefin is second
Alkene polymer, weight average molecular weight 4000-6000.
3. medium temperature modified asphalt mixture additive according to claim 1, which is characterized in that the aliphatic amide
The preparation method comprises the following steps: by stearic acid put into reaction kettle in, heating fusing, continue to heat up under stiring, when being warming up to 140 ± 5 DEG C
Ethylenediamine is added, catalyst is then added, the by-product water of generation and low boilers are separated by water segregator, reaction temperature dimension
It holds at 140~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot.
4. medium temperature modified asphalt mixture additive according to claim 3, which is characterized in that the addition of the ethylenediamine
Amount is 1.5:1 with stearic mass ratio.
5. medium temperature modified asphalt mixture additive according to claim 3, which is characterized in that the catalyst is ten
One of two silico-tungstic acids, phosphoric acid, methyl acetate.
6. a kind of preparation method of the described in any item medium temperature modified asphalt mixture additives of claim 1 ~ 5, feature exist
In being obtained by following steps:
(1) stearic acid is put into reaction kettle, heating fusing continues to heat up under stiring, is warming up to 140 ± 5 DEG C of addition second two
Then catalyst is added in amine, the by-product water of generation and low boilers are separated by water segregator, reaction temperature maintains 140
~160 DEG C, when no longer containing ethylenediamine in the water separated, reaction terminating, discharge to obtain aliphatic amide while hot；
(2) aliphatic amide prepared in step (1) and polyolefin, surfactant, antioxidant are allowed at 160-180 DEG C
It is sufficiently mixed reaction, and granulating and forming obtains medium temperature modified asphalt mixture additive.
7. a kind of a kind of described in any item application methods of medium temperature modified asphalt mixture additive of claim 1 ~ 5, special
Sign is, is added by wet process or dry method:
The wet process, which is added to, to be added to medium temperature modifying agent in pitch and stirs evenly at a temperature of 140 ~ 160 DEG C, stirring
Time 30~60 minutes；
The dry method is added at a temperature of 150 ~ 160 DEG C that medium temperature modified asphalt mixture additive is strictly primary in proportion
Property investment mix cylinder and mixture and stir, mixing time 40~60 seconds.
8. a kind of application method of medium temperature modified asphalt mixture additive according to claim 7, which is characterized in that institute
The quality for stating medium temperature modified asphalt mixture additive is the 1 ~ 5% of asphalt quality.
9. a kind of application method of medium temperature modified asphalt mixture additive according to claim 8, which is characterized in that institute
The quality for stating medium temperature modified asphalt mixture additive is the 3% of asphalt quality.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910155697.2A CN109988431A (en) | 2019-03-01 | 2019-03-01 | A kind of medium temperature modified asphalt mixture additive and its preparation and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910155697.2A CN109988431A (en) | 2019-03-01 | 2019-03-01 | A kind of medium temperature modified asphalt mixture additive and its preparation and application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982290A (en) * | 2019-12-20 | 2020-04-10 | 河南交通职业技术学院 | Aged asphalt regenerant and preparation method thereof |
| CN114350167A (en) * | 2022-02-16 | 2022-04-15 | 江苏中亿通道路新材料有限公司 | PG82-22 modified asphalt and its preparing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982290A (en) * | 2019-12-20 | 2020-04-10 | 河南交通职业技术学院 | Aged asphalt regenerant and preparation method thereof |
| CN114350167A (en) * | 2022-02-16 | 2022-04-15 | 江苏中亿通道路新材料有限公司 | PG82-22 modified asphalt and its preparing method |
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Application publication date: 20190709 |