CN109181328A - A kind of preparation method of composite modified asphalt - Google Patents
A kind of preparation method of composite modified asphalt Download PDFInfo
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- CN109181328A CN109181328A CN201811137094.1A CN201811137094A CN109181328A CN 109181328 A CN109181328 A CN 109181328A CN 201811137094 A CN201811137094 A CN 201811137094A CN 109181328 A CN109181328 A CN 109181328A
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- modified asphalt
- composite modified
- pitch
- sasobit
- preparation
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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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The present invention relates to modified asphalt technology fields, specifically, it is a kind of preparation method of composite modified asphalt, SBS, rubber powder are added in the matrix pitch after heating, Sasobit is added after stirring, it is sheared, product is placed in baking oven after the completion of shearing and is swollen, up to composite modified asphalt, select Sasobit as asphalt stabilizer, to improve the performance of pitch, under conditions of high speed shear, polymer in pitch is subjected to physical crushing, the specific surface area of polymer is made to become larger, increases the contact area of Sasobit and pitch；Sasobit, which is added, promotes reacting for pitch and polymer, make to form crosslinking between pitch and polymer, reduce the viscosity of pitch, Sasobit is instead of sulfide, the properties of product for so that composite modified asphalt toxicity reduces, effectively having ensured practitioner's health, and having obtained are stablized, can batch production store for a long time, adapt to large-scale application.
Description
Technical field
The present invention relates to modified asphalt technology fields, specifically, being a kind of preparation method of composite modified asphalt.
Background technique
In traditional asphalt manufacturing process, using sulfide as stabilizer.In production technology, due to needing 180-190
DEG C high temperature therefore can generate SO2, the toxic and harmful gas such as CO.If things go on like this, operating personnel's health can be injured.And
Conventionally produced asphaltic products, viscosity is high, is unfavorable for the smooth development of engineering.This method is by organic thinner
Sasobit is added to stable rubber asphalt, instead of sulfide as stabilizer, not only available novel stabilising type rubber
Pitch also reduces the viscosity of pitch, to reduce difficulty of construction, this sustainable development for China's economy, and construction
Resource-conserving and environment-friendly society is of great significance.
Modified pitch is directed to add modifying agent in pitch, or takes to measures such as bitumen blowing processing, makes the road of pitch
Improved and manufactured asphalt with performance.The modification of pitch is a physical blending process, and modifier polymer adds
After entering in pitch, by being swollen and being adsorbed on the network structure for forming elasticity in pitch, this network structure has ideal bullet
Property, plasticity and extensibility, improve the performance of pitch comprehensively.
Styrene-Butadiene-Styrene Block Copolymer (SBS) is applied to the history that asphalt modification has decades.
Currently, the problem of the generally existing stability difference of the modified pitch of produced in conventional processes, causes modified pitch segregation phenomenon obvious, no
It can carry out batch production to store for a long time, be not suitable with large-scale application.
Summary of the invention
In order to solve the above-mentioned technical problem, a kind of modification convenient for storing and adapting to large-scale application for a long time is provided for market
Pitch, the present invention discloses a kind of preparation methods of composite modified asphalt.
The specific technical solution that the present invention uses is as follows:
A kind of preparation method of composite modified asphalt, comprising the following steps:
Step 1: being directly added into matrix pitch for saobit and be placed in blender, is heated to 100 DEG C；
Step 2: being added SBS, rubber powder in the Saobit pitch in step 1, starting blender starts to stir, stir 30 seconds
Afterwards, revolving speed is slowly adjusted to 2500 r/min, entire whipping process is no less than 45min, and wherein revolving speed is stirring for 2500r/min
Mixing the time is 15-25min, and temperature is controlled at 150-165 DEG C, obtains composite modified asphalt semi-finished product；
Composite modified asphalt semi-finished product: being placed on high-speed shearing machine by step 3 after the completion of stirring by step 2, by cutter
After preheating 1-2min in rotary head immersion mixture, it is then turned on cutter, while stabilizer and compatilizer is added, entire shear history
It must not be less than 10min, it is 10min that wherein revolving speed, which is the shear time of 2500-3000 r/min, and shear temperature control exists
150-160℃；
Step 4: the composite modified asphalt semi-finished product after step 3 high speed shear be placed on blender stir will, when stirring
A length of 10 min, wherein revolving speed is controlled in 2500 r/min；
Step 5: the product that step 4 is obtained, which is placed in 155 DEG C of baking oven, is swollen 1-2h, that is, completes the system of composite modified asphalt
It is standby.
The present invention is further improved, and step 1 mesostroma pitch is the bi tumenf orr oad of Nanjing 70.
The present invention is further improved, and rubber powder specification is 30-60 mesh bias tire rubber powder in step 1.
The present invention is further improved, and the stabilizer in step 3 is sulphur.
The present invention is further improved, and the compatilizer in step 3 is rubber oil.
The present invention is further improved, and includes Sasobit, rubber, SBS by the composite modified asphalt that step 5 obtains,
Wherein each component account for entire composite modified asphalt mass percent it is as follows: Sasobit1%-3%, SBS 1%-2%, rubber powder
15%-18%, compatilizer 0%-0.2%, stabilizer 0.15%-0.35%, in addition to the above ingredient, remaining ingredient be matrix pitch, respectively at
The sum of total amount divided is 100%；It further says, Sasobit3%, SBS 1%, rubber powder 16%, compatilizer 0.1%, stabilizer
0.25%, in addition to the above ingredient, remaining ingredient is matrix pitch, and the sum of total amount of each ingredient is 100%.
Beneficial effects of the present invention: the invention adopts the above technical scheme, and SBS, rubber powder are added to the base after heating
In matter pitch, Sasobit is added after stirring, is sheared, product is placed in baking oven after the completion of shearing and is swollen to get compound
Modified pitch.
The present invention selects Sasobit as asphalt stabilizer, to improve the performance of pitch, under conditions of high speed shear,
Polymer in pitch is subjected to physical crushing, the specific surface area of polymer is made to become larger, increases contact of the Sasobit with pitch
Area；Sasobit, which is added, promotes reacting for pitch and polymer, makes to form crosslinking between pitch and polymer, reduce
The viscosity of pitch.
The preparation method of composite modified asphalt provided by the invention, Sasobit is instead of sulfide, so that composite modified
Pitch toxicity reduces, and has effectively ensured practitioner's health, and obtained properties of product are stablized, can batch production it is long-term
Storage adapts to large-scale application.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be described in further detail, the reality
It applies example for explaining only the invention, protection scope of the present invention is not constituted and limited.
The preparation method of compound composite modified asphalt of the invention the following steps are included:
Step 1: it selects the bi tumenf orr oad bi tumenf orr oad of Nanjing 70 as matrix pitch, matrix pitch is placed in and is stirred
It mixes in machine, then Sasobit is added in heated asphalt master dilution；
Step 2: being added SBS and rubber powder in above-mentioned pitch, and starting blender starts to stir, and will slowly turn in whipping process
Speed is adjusted to 2500r/min or more, and entire whipping process is 45min, and wherein revolving speed is the mixing time of 2500r/min or more
For 15min, temperature is controlled at 150-165 DEG C, and the rubber powder specification is 30 mesh, and the compatilizer is rubber oil；
Step 3: being added Sasobit in mixture after the completion of above-mentioned stirring, be placed in high-speed shearing machine, and cutter is turned
Head immerses in mixture after preheating 1-2min, unlatching cutter, and revolving speed is slowly adjusted to 2500r/min in shear history, whole
A shear history is 15min, and the shear time that wherein revolving speed is 2500r/min is 10min, and shear temperature is controlled in 150-160
℃；
Step 4: the semi-finished product after the completion of above-mentioned shearing are placed on blender and stir 10 min, wherein revolving speed control exists
2500-3000r/min, temperature are controlled at 150-160 DEG C；
Step 5: the product that step 4 is obtained, which is placed in 155 DEG C of baking oven, is swollen 1-2h to get composite modified asphalt.
Above-mentioned composite modified asphalt includes matrix pitch, SBS, rubber powder, compatilizer and stabilizer, and wherein each component exists
Mass percent in stable type rubber modified asphalt is as follows:
Sasobit3%, SBS 1%, rubber powder 16%, compatilizer 0.1%, stabilizer 0.25%, in addition to the above ingredient, remaining ingredient is
Matrix pitch, the sum of total amount of each ingredient are 100%.
Embodiment one: by mass, following each component is weighed: 3 parts of Sasobit, 1 part of SBS, rubber powder (30 mesh) 16
Part, 0.1 part of rubber oil, 0.25 part of sulphur, No. 70 79.65 parts of bi tumenf orr oad.
It selects No. 70 bi tumenf orr oads as matrix pitch, matrix pitch is placed in blender, matrix pitch is set
In blender, then Sasobit is added in heated asphalt master dilution；In above-mentioned matrix pitch be added SBS, rubber powder and
Rubber oil, starting blender start to stir, and revolving speed are slowly adjusted to 3000r/min in whipping process, entire whipping process is
45min ；The mixing time that wherein revolving speed is 3000r/min is 20min, and temperature is controlled at 160 DEG C；Then in above-mentioned stirring
Sulphur is added in mixture after the completion, is placed in high-speed shearing machine, cutter rotary head is immersed in mixture and preheats 1-2min
Afterwards, cutter to be opened, revolving speed is slowly adjusted to 2500r/min in shear history, entire shear history is 15-18min, wherein
The shear time that revolving speed is 2500r/min is 10-12min, and shear temperature is controlled at 150-160 DEG C；After the completion of above-mentioned shearing
Semi-finished product be placed on blender and stir 10min, wherein revolving speed control is controlled in 3000r/ min, temperature at 190 DEG C；It will be upper
The product stated, which is placed in 155 DEG C of baking oven, is swollen 1.5h to get stable type rubber modified asphalt.
Embodiment two: by mass, following each component is weighed: 1.5 parts of Sasobit SBS, 15 parts of rubber powder (60 mesh),
0.2 part of rubber oil, 0.15 part of sulphur, No. 70 83.15 parts of bi tumenf orr oad.
It selects No. 70 bi tumenf orr oads as matrix pitch, matrix pitch is placed in blender, be heated to 180 DEG C；
SBS, rubber powder and rubber oil are added in above-mentioned matrix pitch, starting blender starts to stir, and will slowly turn in whipping process
Speed is adjusted to 2500r/min, and entire whipping process is 55min, and the mixing time that wherein revolving speed is 2500r/min is 25min,
Temperature is controlled at 190 DEG C；Sulphur is added in mixture after the completion of above-mentioned stirring, is placed in high-speed shearing machine, by cutter
Rotary head is immersed in mixture after preheating 1-2min, unlatching cutter, and revolving speed is slowly adjusted to 3000r/min in shear history,
Entire shear history is 15-18min, and the shear time that wherein revolving speed is 3000r/min is 10-12min, and shear temperature control exists
175-180℃；Semi-finished product after the completion of above-mentioned shearing are placed on blender and stir 15min, wherein revolving speed control exists
2500r/ min, temperature are controlled at 180 DEG C；Product obtained above is placed in 180 DEG C of baking oven and is swollen 1h to get steady
Sizing rubber modified asphalt.
Embodiment three: by mass, following each component is weighed: 2 parts of SBS, 18 parts of rubber powder (60 mesh), sulphur 0.35
Part, No. 70 79.65 parts of bi tumenf orr oad.
It selects No. 70 bi tumenf orr oads as matrix pitch, matrix pitch is placed in blender, be heated to 175 DEG C；
SBS and rubber powder are added in above-mentioned matrix pitch, and starting blender starts to stir, slowly revolving speed adjusted in whipping process
To 2800r/min, entire whipping process is 50min, and the mixing time that wherein revolving speed is 2800r/min is 15min, temperature control
System is at 185 DEG C；Sulphur is added in mixture after the completion of above-mentioned stirring, is placed in high-speed shearing machine, cutter rotary head is soaked
Enter after preheating 1-2min in mixture, opens cutter, revolving speed is slowly adjusted to 2800r/min in shear history, is entirely cut
Cutting through journey is 15-18min, and the shear time that wherein revolving speed is 2800r/min is 10-12min, and shear temperature is controlled in 175-
180℃；Semi-finished product after the completion of above-mentioned shearing are placed on blender and stir 10-15min, wherein revolving speed is controlled in 2800r/
Min, temperature are controlled at 185 DEG C；Product obtained above is placed in swelling 2h in 170 DEG C of baking oven to change to get stable type rubber
Property pitch.
3.3 viscosity of table one: 3.1 needle penetration, 3.2 softening point, 3.4 ductility 3.5 isolates 3.6 ageing properties, 3.7 elasticity and restores
Wherein Sasobit content 3%
Table two: different pitches elasticity restores test result
Table three: different pitches isolation test result
The composite modified asphalt produced using method of the invention, plasticity is strong, high temperature resistant, adapts to extreme climate, obtained production
Moral character can be stablized, can batch production store for a long time, adapt to large-scale application.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
1. a kind of preparation method of composite modified asphalt, which is characterized in that itself the following steps are included:
Step 1: being directly added into matrix pitch for saobit and be placed in blender, is heated to 100 DEG C；
Step 2: being added SBS, rubber powder in the Saobit pitch in step 1, starting blender starts to stir, stir 30 seconds
Afterwards, revolving speed is slowly adjusted to 2500 r/min, entire whipping process is no less than 45min, and wherein revolving speed is stirring for 2500r/min
Mixing the time is 15-25min, and temperature is controlled at 150-165 DEG C, obtains composite modified asphalt semi-finished product；
Composite modified asphalt semi-finished product: being placed on high-speed shearing machine by step 3 after the completion of stirring by step 2, by cutter
After preheating 1-2min in rotary head immersion mixture, it is then turned on cutter, while stabilizer and compatilizer is added, entire shear history
It must not be less than 10min, it is 10min that wherein revolving speed, which is the shear time of 2500-3000 r/min, and shear temperature control exists
150-160℃；
Step 4: the composite modified asphalt semi-finished product after step 3 high speed shear be placed on blender stir will, when stirring
A length of 10 min, wherein revolving speed is controlled in 2500 r/min；
Step 5: the product that step 4 is obtained, which is placed in 155 DEG C of baking oven, is swollen 1-2h, that is, completes the system of composite modified asphalt
It is standby.
2. the preparation method of the composite modified asphalt according to claim 1, which is characterized in that base in the step 1
Matter pitch is the bi tumenf orr oad of Nanjing 70.
3. the preparation method of the composite modified asphalt according to claim 1, which is characterized in that rubber in the step 1
Powder specification is 30-60 mesh bias tire rubber powder.
4. the preparation method of the composite modified asphalt according to claim 1, which is characterized in that steady in the step 3
Determining agent is sulphur.
5. the preparation method of the composite modified asphalt according to claim 1, which is characterized in that the phase in the step 3
Appearance agent is rubber oil.
6. the preparation method of the composite modified asphalt according to claim 1, which is characterized in that obtained by step 5
Composite modified asphalt includes Sasobit, rubber, SBS, and wherein each component accounts for the mass percent of entire composite modified asphalt such as
Under: Sasobit1%-3%, SBS 1%-2%, rubber powder 15%-24%, compatilizer 0%-0.2%, stabilizer 0.15%-0.35% are removed
Outside the above ingredient, remaining ingredient is matrix pitch, and the sum of total amount of each ingredient is 100%.
7. the preparation method of composite modified asphalt according to claim 6, which is characterized in that obtained by step 5
Composite modified asphalt includes Sasobit, rubber, SBS, and wherein each component accounts for the mass percent of entire composite modified asphalt such as
Under: Sasobit 3%, SBS 1%, rubber powder 16%, compatilizer 0.1%, stabilizer 0.25%, in addition to the above ingredient, remaining ingredient
For matrix pitch, the sum of the total amount of each ingredient is 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811137094.1A CN109181328A (en) | 2018-09-28 | 2018-09-28 | A kind of preparation method of composite modified asphalt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811137094.1A CN109181328A (en) | 2018-09-28 | 2018-09-28 | A kind of preparation method of composite modified asphalt |
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| CN201811137094.1A Pending CN109181328A (en) | 2018-09-28 | 2018-09-28 | A kind of preparation method of composite modified asphalt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957255A (en) * | 2019-04-09 | 2019-07-02 | 南京科技职业学院 | A kind of preparation method of rubber modified asphalt |
| CN110387130A (en) * | 2019-07-15 | 2019-10-29 | 南京科技职业学院 | A kind of preparation method of rubber powder asphalt |
| CN111440456A (en) * | 2020-04-23 | 2020-07-24 | 中交路桥建设有限公司 | SBS rubber powder modified asphalt, preparation method and pavement construction method thereof |
| CN115368746A (en) * | 2022-07-13 | 2022-11-22 | 广西交建工程检测咨询有限公司 | Stable environment-friendly rubber asphalt and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468010A (en) * | 2013-09-24 | 2013-12-25 | 山东金石沥青股份有限公司 | Modified asphalt as well as preparation method thereof |
| CN103804937A (en) * | 2014-03-11 | 2014-05-21 | 扬州大学 | Preparation method of warm-mixing wet process TOR (Vestenamer) rubber asphalt |
| CN103980723A (en) * | 2014-05-30 | 2014-08-13 | 福建省燕宁顺通科技发展有限责任公司 | Preparation method of stable rubber modified asphalt |
| CN104098918A (en) * | 2013-04-11 | 2014-10-15 | 上海建设机场道路工程有限公司 | Modified asphalt and preparation method thereof |
| CN106751972A (en) * | 2016-12-19 | 2017-05-31 | 绍兴丰源节能科技有限公司 | A kind of high-adaptability pitch and its processing method |
| CN107641329A (en) * | 2017-11-03 | 2018-01-30 | 湖南大学 | The bituminous paving composite modified pitch of environmentally friendly warm mix, modifying agent and preparation method thereof |
| CN107915878A (en) * | 2017-11-22 | 2018-04-17 | 山东交通学院 | It is a kind of suitable for asphalt composite modifier of modified hard pitch and preparation method thereof |
-
2018
- 2018-09-28 CN CN201811137094.1A patent/CN109181328A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098918A (en) * | 2013-04-11 | 2014-10-15 | 上海建设机场道路工程有限公司 | Modified asphalt and preparation method thereof |
| CN103468010A (en) * | 2013-09-24 | 2013-12-25 | 山东金石沥青股份有限公司 | Modified asphalt as well as preparation method thereof |
| CN103804937A (en) * | 2014-03-11 | 2014-05-21 | 扬州大学 | Preparation method of warm-mixing wet process TOR (Vestenamer) rubber asphalt |
| CN103980723A (en) * | 2014-05-30 | 2014-08-13 | 福建省燕宁顺通科技发展有限责任公司 | Preparation method of stable rubber modified asphalt |
| CN106751972A (en) * | 2016-12-19 | 2017-05-31 | 绍兴丰源节能科技有限公司 | A kind of high-adaptability pitch and its processing method |
| CN107641329A (en) * | 2017-11-03 | 2018-01-30 | 湖南大学 | The bituminous paving composite modified pitch of environmentally friendly warm mix, modifying agent and preparation method thereof |
| CN107915878A (en) * | 2017-11-22 | 2018-04-17 | 山东交通学院 | It is a kind of suitable for asphalt composite modifier of modified hard pitch and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957255A (en) * | 2019-04-09 | 2019-07-02 | 南京科技职业学院 | A kind of preparation method of rubber modified asphalt |
| CN110387130A (en) * | 2019-07-15 | 2019-10-29 | 南京科技职业学院 | A kind of preparation method of rubber powder asphalt |
| CN111440456A (en) * | 2020-04-23 | 2020-07-24 | 中交路桥建设有限公司 | SBS rubber powder modified asphalt, preparation method and pavement construction method thereof |
| CN115368746A (en) * | 2022-07-13 | 2022-11-22 | 广西交建工程检测咨询有限公司 | Stable environment-friendly rubber asphalt and preparation method thereof |
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Application publication date: 20190111 |