CN109320974A - A kind of high viscosity composite modified asphalt and preparation method thereof - Google Patents
A kind of high viscosity composite modified asphalt and preparation method thereof Download PDFInfo
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- CN109320974A CN109320974A CN201810874517.1A CN201810874517A CN109320974A CN 109320974 A CN109320974 A CN 109320974A CN 201810874517 A CN201810874517 A CN 201810874517A CN 109320974 A CN109320974 A CN 109320974A
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- modified asphalt
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- high viscosity
- nano montmorillonite
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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Abstract
The invention discloses a kind of high viscosity composite modified asphalts and preparation method thereof, by percentage to the quality, including following components: matrix pitch 84.7% ~ 86.2%, high stick 11.1% ~ 12.0%, nano montmorillonite 2.5% ~ 3.4%.The present invention adds the montmorillonite with nanometer laminated structure in common high-viscosity modified asphalt, using nano montmorillonite as can be by intercalation when modifying agent the characteristics of, significantly improve the barrier property of common high-viscosity modified asphalt, the infiltration of the external factor such as sunlight, air and rainwater and diffusion path is set to become tortuous, to significantly improve its heat resistanceheat resistant oxygen, water and ultraviolet light and aging performance, other pavement performances of common high-viscosity modified asphalt do not reduce simultaneously, and the performances such as high temperature Rut resistance, storage stability, antifatigue have obtained different degrees of improvement.
Description
Technical field
The invention belongs to road asphalt field of material technology, and in particular to a kind of high viscosity composite modified asphalt and its preparation
Method.
Background technique
With pushing forward comprehensively for China's sponge urban construction, drainage asphalt mixture obtains extensive concern.This is a kind of
Extruded aggregate open gradation asphalt with good draining, antiskid and decrease of noise functions, after compacting voidage be up to 18~
25%, rainfall, which can pass through impermeable stratum surface of the porous mixture surface course under it and drain into two sides, to be vented, to reduce road surface product
Misty rain caused by water, splashing and dazzle provide guarantee for the comfortableness and security of driving.
The shortcomings that drainage asphalt mixture, essentially consists in: its perforation porous structure can make mixture internal material by
The direct effect of sunlight, air and rainwater, so the bituminous cements in mixture composition is easier to that aging occurs.Current drainage
Asphalt mainly uses high-viscosity modified asphalt as cementitious matter, and high-viscosity modified asphalt has superior cohesion and resists
Plastic deformation ability, compared to modified asphalt, significantly improve drainage asphalt mixture high temperature Rut resistance, it is durable and
The anti-performances such as disperse, while the distinctive high-adhesiveness of high-viscosity modified asphalt and stronger stripper-resistance also make to be wrapped in the table that gathers materials
The asphalt membrane thickness in face increased, and can play the role of mitigating bituminous cements aging to a certain degree.
It directly acts on and may make to further eliminate sunlight, air and rainwater to drainage asphalt mixture internal material
At pavement disease, high-viscosity modified asphalt should also have the performance of excellent heat resistanceheat resistant oxygen, water and ultraviolet light and aging.But mesh
Preceding China's current professional standard " standard specification for construction and acceptance of highway asphalt pavement " JTG F20 and " asphalt paving technical regulation "
CJJ/T 190 claims only for the thermo oxidative aging index of high-viscosity modified asphalt, reported modified with high viscosity
The relevant domestic and foreign literature of pitch anti-aging property is also concentrated mainly on the research direction, therefore common TPS in road engineering
(TAFPACK-Super) high-viscosity modified asphalt and other high-viscosity modified asphalts water resistant, ultraviolet light and aging aspect of performance still
Shortcomings, 106,496,915 107189470 technologies involved in the patent applications such as A of A, CN 106633961 of A, CN of CN are equal
Belong to such case.
Summary of the invention
The object of the present invention is to provide a kind of high viscosity composite modified asphalts and preparation method thereof.
In order to solve the above technical problem, the present invention provides a kind of high viscosity composite modified asphalts, by percentage to the quality,
Including following components: matrix pitch 84.7%~86.2%, high stick 11.1%~12.0%, nano montmorillonite 2.5%~
3.4%.
Further, the matrix pitch is bi tumenf orr oad.
Further, the high stick is TPS modifying agent.
Further, the nano montmorillonite is organo montmorillonite.
Further, for aforementioned any high viscosity composite modified asphalt, the present invention also proposes a kind of preparation method,
Include the following steps:
(1) it stocks up: matrix pitch, high stick, nano montmorillonite by mass percentage 84.7%~86.2%；11.1%~
12.0%；2.5%~3.4% stock；
(2) high speed shear: successively the nano montmorillonite of the matrix pitch of molten condition, the high stick of drying and drying is added
Enter into blender and carries out high speed shear；
(3) mixture after shearing is put into swelling 1h~1.5h in 160 DEG C~170 DEG C of baking oven, obtains high-viscosity compound
Close modified pitch.
Further, the matrix pitch of molten condition is that matrix pitch is warming up to 140 DEG C~160 DEG C to reach molten
State.
Further, the matrix pitch of molten condition is added to and carries out cutting at a high speed in 160 DEG C~170 DEG C of blender
It cuts, revolving speed is 1500r/min~3000r/min, shears 2~5min.
Further, dry high stick is added in 160 DEG C~170 DEG C of blender and carries out high speed shear, revolving speed
For 1500r/min~3000r/min, 18min~22min is sheared.
Further, dry nano montmorillonite is added in blender, temperature rises to 170 DEG C~190 DEG C, revolving speed
For 4500r/min~6000r/min, 60min~65min is sheared.
Compared with prior art, remarkable advantage is high viscosity composite modified asphalt of the present invention: the present invention is meeting now
Row professional standard " standard specification for construction and acceptance of highway asphalt pavement " JTG F20 and " asphalt paving technical regulation " CJJ/T 190
Under the premise of to high-viscosity modified asphalt items technical requirements, significantly improve its heat resistanceheat resistant oxygen, water and ultraviolet light and aging performance, it is right
In the promotion and application of drainage asphalt mixture, it has great promotion effect.
Detailed description of the invention
Fig. 1 is the preparation technology flow chart of high viscosity composite modified asphalt of the present invention.
Specific embodiment
It is readily appreciated that, technical solution according to the present invention, in the case where not changing connotation of the invention, this field
Those skilled in the art can imagine the numerous embodiments of high viscosity composite modified asphalt of the present invention and preparation method thereof.Cause
This, following specific embodiments and attached drawing are only the exemplary illustrations to technical solution of the present invention, and are not to be construed as this hair
Bright whole is considered as limitation or restriction to technical solution of the present invention.
The present invention adds the montmorillonite with nanometer laminated structure in common high-viscosity modified asphalt, is covered using nanometer de-
The characteristics of soil can be by intercalation when being used as modifying agent, significantly improves the barrier property of common high-viscosity modified asphalt, makes sunlight, air
Infiltration and diffusion path with the external factor such as rainwater become tortuous, to significantly improve its heat resistanceheat resistant oxygen, water and ultraviolet light and aging
Performance, while other pavement performances of common high-viscosity modified asphalt do not reduce, high temperature Rut resistance, storage stability, resist it is tired
The performances such as labor also obtain different degrees of improvement.
Embodiment 1:
The present embodiment high viscosity composite modified asphalt, by percentage to the quality, including following components: matrix pitch
85.5%, high stick 11.1%, nano montmorillonite 3.4%.
Matrix pitch uses No. 70 A grades of bi tumenf orr oads, and performance test results are as shown in table 1, is all satisfied " highway drip
Green pavement construction technical specification " (JTG F20-2004) technical requirements.
The performance test results of 1 No. 70 A grades of bi tumenf orr oads of table
High stick uses TPS modifying agent, performance test results are as follows: particle size range is 2mm~3mm, density 0.6g/
cm3。
(the DK3 type of Feng Hong new material limited liability company of Zhejiang Province production is organic using organo montmorillonite for nano montmorillonite
Montmorillonite), performance test results are as follows: average wafer thickness is less than 25nm, and smectite content is greater than 96%, and apparent density is
0.33g/cm3, for water capacity less than 3%, " < 0.075mm " granule content is greater than 99.9%.
As shown in Figure 1, the preparation method of high viscosity composite modified asphalt of the embodiment of the present invention the following steps are included:
(1) it stocks up: matrix pitch, high stick, nano montmorillonite by mass percentage 85.5%；11.1%；3.4% is standby
Material；
(2) dry or heat pre-treatment: high stick and nano montmorillonite are dried into 6h in vacuum desiccator, matrix is dripped
Blueness is heated to molten condition, and temperature is 155 DEG C~160 DEG C；
(3) matrix pitch for reaching molten condition in step (2) high speed shear: is added to 160 DEG C~170 DEG C of stirring
High speed shear is carried out in machine, revolving speed 2000r/min shears 3min；
(4) it adds high stick: high stick dry in step (2) is added in blender, shear 20min；
(5) it adds montmorillonite: nano montmorillonite dry in step (2) being added in blender, temperature rises to 180
DEG C~190 DEG C, revolving speed 4500r/min, shear 60min；
(6) it is swollen: the mixture after shearing being put into 160 DEG C~165 DEG C of baking oven and be swollen 1h, it is compound to obtain high viscosity
Modified pitch.The high viscosity composite modified asphalt that the present embodiment is prepared, performance test results are as shown in table 2.
2 embodiment high viscosity composite modified asphalt performance test results of table
As shown in Table 2, the performance indexes of the present embodiment high viscosity composite modified asphalt is all satisfied " asphalt highway
Construction technique normalizing " (JTG F20-2004) and " asphalt paving technical regulation " (CJJ/T 190-2012) change high viscosity
The technical requirements of property pitch.25 DEG C of residual this indexs of penetration ratio reflect the anti-of high-viscosity modified asphalt after TFOT in table 2
Short-term thermal-oxidative aging property, but in current specifications without for high-viscosity modified asphalt resist long-term thermo-oxidative ageing, water aging and
The evaluation index of ultraviolet light and aging performance, this is incompatible with its application environment.
It is old that short-term and long-term thermo-oxidative ageing, water aging and ultraviolet light are carried out to the high viscosity composite modified asphalt of the present embodiment
Change test, evaluates its heat resistanceheat resistant oxygen, water and ultraviolet light and aging performance using 25 DEG C of residual penetration ratios of sample after aging.
The hot oxygen test of short ageing uses " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
In thin film heating test (TFOT), by 50g bitumen samples be put into contain sample dish in, form film in homogeneous thickness, then put
It on the turntable for entering film heating baking oven, closes instrument and starts turntable mounting and tested, experimental condition is 163 DEG C of temperature, revolving speed
5.5r/min, time 5h, to simulate bitumen samples storage, transport, mix and stir and paving process in short-term thermo-oxidative ageing make
With.
Long-term thermo-oxidative ageing test uses " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
In pressure aging vessel PAV accelerate ageing of asphalt test, experimental condition be 100 DEG C of temperature, pressure 2.1MPa, time 20h, to
The thermo-oxidative ageing situation that simulation bitumen samples occur during 5 years pavement usages.
The step of water degradation are as follows: 50g bitumen samples are put into and are contained in sample dish, and suitable quantity of water is added in containing sample dish,
The quality of water is the 5% of bitumen samples quality, after being put into the sample frame of pressure vessel, closes pressure vessel, while it is old to carry out water
Change test and the test of long-term thermo-oxidative ageing, experimental condition is similarly 100 DEG C of temperature, pressure 2.1MPa, time 20h.
The step of ultraviolet light and aging is tested are as follows: the Sheng sample dish equipped with 20g bitumen samples are put into ultraviolet ray ageing instrument, are allowed
After at its center for being in ultraviolet lamp irradiation, closes instrument and start to carry out ultraviolet light and aging test, experimental condition is temperature 60
DEG C, irradiation time 16h.Black light high-pressure sodium lamp 9 are set in ultraviolet ray ageing instrument, and the ultraviolet light that wavelength is 365nm can be provided.
In order to reflect the heat resistanceheat resistant oxygen, water and ultraviolet light and aging performance of the present embodiment high viscosity composite modified asphalt comprehensively, together
When reduce experiment quantity to the greatest extent, tested respectively using 3 kinds of aging combining forms, aging combining form is as shown in table 3.
The aging combining form of 3 the present embodiment high viscosity composite modified asphalt of table
3 kinds of aging combination conditions in table 3 are respectively adopted in the high viscosity composite modified asphalt of the present embodiment and carry out aging
Simulation test, the sample that obtains later carry out 25 DEG C of penetration tests, test result divided by unaged sample 25 DEG C of needle penetrations
It is worth to get 25 DEG C of residual penetration ratios of high viscosity composite modified asphalt are arrived, the composite modified drip of high viscosity is reflected using the index
Anti-aging property of the blueness under different aging combination conditions.
25 DEG C of residual penetration ratios that the high viscosity composite modified asphalt of the present embodiment measures after 3 kinds of aging composite tests
As shown in table 4.In order to compare, the common high-viscosity modified asphalt sample for not mixing nano montmorillonite has been listed file names in table 4 in phase
With the 25 DEG C of residual penetration ratios measured under experimental condition.
It does not mix in the common high-viscosity modified asphalt sample of nano montmorillonite other than not adding nano montmorillonite, other
Material composition situation is identical as the high viscosity composite modified asphalt of the present embodiment, and nano montmorillonite component is replaced by matrix drip
It is green.
25 DEG C residual penetration ratios of the 4 two kinds of high-viscosity modified asphalts of table in the case where 3 kinds of agings are combined
As can be seen from Table 4: compared to the common high-viscosity modified asphalt for not mixing nano montmorillonite, the height of the present embodiment is viscous
25 DEG C of residual penetration ratios for spending composite modified asphalt are distinguished under the conditions of 1#, aging combination 2# and aging combination 3# are combined in aging
39.8%, 33.3%, 34.8% is improved, i.e. the heat resistanceheat resistant oxygen of the present embodiment high viscosity composite modified asphalt, water and ultraviolet light is old
Change performance and is substantially better than the common high-viscosity modified asphalt for not mixing nano montmorillonite.
Embodiment 2:
The present embodiment high viscosity composite modified asphalt, by percentage to the quality, including following components: matrix pitch
86.2%, high stick 11.2%, nano montmorillonite 2.6%.
Matrix pitch uses No. 70 A grades of bi tumenf orr oads, and high stick uses TPS modifying agent, and nano montmorillonite uses Zhejiang
The DK3 type organo montmorillonite of Jiang Shengfeng rainbow new material limited liability company production.
The preparation method of high viscosity composite modified asphalt of the embodiment of the present invention the following steps are included:
(1) it stocks up: matrix pitch, high stick, nano montmorillonite by mass percentage 86.2%；11.2%；2.6% is standby
Material；
(2) dry or heat pre-treatment: high stick and nano montmorillonite are dried into 6h in vacuum desiccator, matrix is dripped
Blueness is heated to molten condition, and temperature is 155 DEG C~160 DEG C；
(3) matrix pitch for reaching molten condition in step (2) high speed shear: is added to 160 DEG C~170 DEG C of stirring
High speed shear is carried out in machine, revolving speed 2000r/min shears 3min；
(4) it adds high stick: high stick dry in step (2) is added in blender, shear 20min；
(5) it adds montmorillonite: nano montmorillonite dry in step (2) being added in blender, temperature rises to 180
DEG C~190 DEG C, revolving speed 4500r/min, shear 60min；
(6) it is swollen: the mixture after shearing being put into 160 DEG C of baking oven and be swollen 1h, obtain the composite modified drip of high viscosity
It is green.
By detection similarly to Example 1, indices reach requirement same as Example 1.
Embodiment 3:
The present embodiment high viscosity composite modified asphalt, by percentage to the quality, including following components: matrix pitch
84.7%, high stick 11.9%, nano montmorillonite 3.4%.
Matrix pitch uses No. 70 A grades of bi tumenf orr oads, and high stick uses TPS modifying agent, and nano montmorillonite uses Zhejiang
The DK3 type organo montmorillonite of Jiang Shengfeng rainbow new material limited liability company production.
The preparation method of high viscosity composite modified asphalt of the embodiment of the present invention the following steps are included:
(1) it stocks up: matrix pitch, high stick, nano montmorillonite by mass percentage 84.7%；11.9%；3.4% is standby
Material；
(2) dry or heat pre-treatment: high stick and nano montmorillonite are dried into 6h in vacuum desiccator, matrix is dripped
Blueness is heated to molten condition, and temperature is 155 DEG C~160 DEG C；
(3) matrix pitch for reaching molten condition in step (2) high speed shear: is added to 160 DEG C~170 DEG C of stirring
High speed shear is carried out in machine, revolving speed 2000r/min shears 3min；
(4) it adds high stick: high stick dry in step (2) is added in blender, shear 20min；
(5) it adds montmorillonite: nano montmorillonite dry in step (2) being added in blender, temperature rises to 180
DEG C~190 DEG C, revolving speed 4500r/min, shear 60min；
(6) it is swollen: the mixture after shearing being put into 160 DEG C of baking oven and be swollen 1h, obtain the composite modified drip of high viscosity
It is green.
By detection similarly to Example 1, indices reach requirement same as Example 1.
Embodiment 4:
The present embodiment high viscosity composite modified asphalt, by percentage to the quality, including following components: matrix pitch
85.5%, high stick 12.0%, nano montmorillonite 2.5%.
Matrix pitch uses No. 70 A grades of bi tumenf orr oads, and high stick uses TPS modifying agent, and nano montmorillonite uses Zhejiang
The DK3 type organo montmorillonite of Jiang Shengfeng rainbow new material limited liability company production.
The preparation method of high viscosity composite modified asphalt of the embodiment of the present invention the following steps are included:
(1) it stocks up: matrix pitch, high stick, nano montmorillonite by mass percentage 85.5%；12.0%；2.5% is standby
Material；
(2) dry or heat pre-treatment: high stick and nano montmorillonite are dried into 6h in vacuum desiccator, matrix is dripped
Blueness is heated to molten condition, and temperature is 155 DEG C~160 DEG C；
(3) matrix pitch for reaching molten condition in step (2) high speed shear: is added to 160 DEG C~170 DEG C of stirring
High speed shear is carried out in machine, revolving speed 2000r/min shears 5min；
(4) it adds high stick: high stick dry in step (2) is added in blender, shear 20min；
(5) it adds montmorillonite: nano montmorillonite dry in step (2) being added in blender, temperature rises to 180
DEG C~190 DEG C, revolving speed 4500r/min, shear 60min；
(6) it is swollen: the mixture after shearing being put into 160 DEG C of baking oven and be swollen 1h, obtain the composite modified drip of high viscosity
It is green.
By detection similarly to Example 1, indices reach requirement same as Example 1.
By the embodiment and its experiment, high viscosity composite modified asphalt of the invention is meeting existing professional standard
" standard specification for construction and acceptance of highway asphalt pavement " JTG F20 and " asphalt paving technical regulation " CJJ/T 190 change high viscosity
Property pitch items technical requirements under the premise of, significantly improve its heat resistanceheat resistant oxygen, water and ultraviolet light and aging performance, for drainage drip
It has great promotion effect for the promotion and application of green mixture.
Claims (9)
1. a kind of high viscosity composite modified asphalt, which is characterized in that by percentage to the quality, including following components: matrix pitch
84.7% ~ 86.2%, high stick 11.1% ~ 12.0%, nano montmorillonite 2.5% ~ 3.4%.
2. high viscosity composite modified asphalt as described in claim 1, which is characterized in that the matrix pitch is the drip of road petroleum
It is green.
3. high viscosity composite modified asphalt as described in claim 1, which is characterized in that the high stick is TPS modifying agent.
4. high viscosity composite modified asphalt as described in claim 1, which is characterized in that the nano montmorillonite is de- for organic illiteracy
Soil.
5. the preparation method of the high viscosity composite modified asphalt as described in claim 1-4 is any, which is characterized in that including as follows
Step:
(1) it stocks up: stocking up by being matched shared by matrix pitch, high stick, nano montmorillonite；
(2) high speed shear: successively the nano montmorillonite of the matrix pitch of molten condition, the high stick of drying and drying is added to
High speed shear is carried out in blender；
(3) mixture after shearing is placed in swelling 1h ~ 1.5h at 160 DEG C ~ 170 DEG C, obtains high viscosity composite modified asphalt.
6. method as claimed in claim 5, which is characterized in that the matrix pitch of molten condition is by the way that matrix pitch to be warming up to
140 DEG C ~ 160 DEG C reach molten condition.
7. method as claimed in claim 5, which is characterized in that the matrix pitch of molten condition is added to 160 DEG C ~ 170 DEG C
Blender in carry out high speed shear, revolving speed be 1500r/min ~ 3000r/min, shear 2 ~ 5min.
8. method as claimed in claim 5, which is characterized in that dry high stick is added to 160 DEG C ~ 170 DEG C of stirring
High speed shear is carried out in machine, revolving speed is 1500r/min ~ 3000r/min, shears 18min ~ 22min.
9. method as claimed in claim 5, which is characterized in that dry nano montmorillonite is added in blender, temperature
170 DEG C ~ 190 DEG C are risen to, revolving speed is 4500r/min ~ 6000r/min, shears 60min ~ 65min.
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| CN201810874517.1A CN109320974A (en) | 2018-08-03 | 2018-08-03 | A kind of high viscosity composite modified asphalt and preparation method thereof |
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| CN111999238A (en) * | 2020-06-05 | 2020-11-27 | 河海大学 | Indoor simulation asphalt mixture aging method |
| CN115044215A (en) * | 2022-06-23 | 2022-09-13 | 王秀庆 | Nano modified asphalt and preparation method thereof |
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| CN115044215A (en) * | 2022-06-23 | 2022-09-13 | 王秀庆 | Nano modified asphalt and preparation method thereof |
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