CN105111756A - High-viscosity modified pitch additive as well as preparation method and application thereof - Google Patents

High-viscosity modified pitch additive as well as preparation method and application thereof Download PDF

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CN105111756A
CN105111756A CN201510607294.9A CN201510607294A CN105111756A CN 105111756 A CN105111756 A CN 105111756A CN 201510607294 A CN201510607294 A CN 201510607294A CN 105111756 A CN105111756 A CN 105111756A
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viscosity modified
modified asphalt
parts
asphalt additive
viscosity
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CN105111756B (en
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刘红瑛
王春
徐金枝
彭子馨
陈治君
汪海年
张铭铭
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Changan University
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Abstract

The invention discloses a high-viscosity modified pitch additive which is prepared from the following raw materials in parts by weight: 100 parts of a main modifier, 16-32 parts of an activating agent, 25-58 parts of a tackifier and 0.8-3 parts of a stabilizing agent, wherein the main modifier is formed by mixing styrene copolymer and rubber powder, and comprises the styrene copolymer with the weight content of 25-50% and the balance of the rubber powder; the activating agent is environment-friendly rubber oil; the tackifier is petroleum resin; the stabilizing agent is sulphur. Besides, the invention further discloses a method for preparing the high-viscosity modified pitch additive and application of the high-viscosity modified pitch additive. The high-viscosity modified pitch additive can improve the high-low temperature properties and the aging resistance of substrate pitch, the preparation process is simple, the economic efficiency is good, and the high-viscosity modified pitch additive can prolong the service life of water-draining asphalt pavement when being further applied to the pavement of water-draining asphalt pavement.

Description

A kind of high-viscosity modified asphalt additive and its preparation method and application
Technical field
The invention belongs to road bitumen field of material technology, be specifically related to a kind of high-viscosity modified asphalt additive and its preparation method and application.
Background technology
Along with socioeconomic fast development, people's quality requirement of going on a journey constantly is upgraded, the theory that transport development also highlights further " environmental friendliness ".In field of road, how to improve the using function on road surface, how to provide road surface function that is safer, more comfortable, more environmental protection to society, become the fresh target that traffic department of China is pursued under the new period.Take a broad view of domestic and international frontline technology, porous asphalt pavement is mated formation because having, and cling property is high, noise is low, suppress the drift of water smoke, anti-sealing, alleviate the outstanding advantages such as dazzle, becomes one of best road surface form realizing the leap of road surface function quality.
But things all has dual character, drainage asphalt pavement is no exception, also has certain defect.There are two subject matters in drainage asphalt pavement: one is the blocking in space, and two is oxidations of binder.Space blocking can cause decrease of noise functions and prevent splashing miopragia, its noise level and splashing degree more and more close to traditional dense-graded mix, but as the use on road surface still in tolerance interval.The oxidation of binder is then the principal element in restriction drainage asphalt pavement work-ing life, and relative to traditional dense bitumen compound, the large porosity of drainage asphalt pavement accelerates the oxidation of binder.Under the effect of traffic loading shearing force, ground surface material causes stability lack due to binder oxidation, engender loose, cheat the phenomenon such as groove, finally cause the coarse injustice in road surface.Compare with traditional dense bitumen compound, the economy that have impact on its use work-ing life that drainage asphalt pavement is shorter, constrain the widespread use of this safety, environment protection pavement.Therefore be necessary to research and develop a kind of high viscosity (60 DEG C of kinetic viscosities of modifying asphalt are not less than 20000Pas), high temperature performance is excellent, ageing-resistant performance good, the good high-viscosity modified asphalt of the simple and economic property of preparation technology, the binder being applicable to drainage asphalt pavement is provided, to reduce binder oxidation as far as possible, prolonging service life of pavement.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of high-viscosity modified asphalt additive is provided, this high-viscosity modified asphalt additive can improve high temperature performance and the ageing-resistant performance of matrix pitch, simple and the good economy performance of preparation technology, can extend the work-ing life of porous asphalt pavement after using.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of high-viscosity modified asphalt additive, is characterized in that, be made up of the raw material of following weight part: modified host crystal 100 parts, 16 ~ 32 parts, activator, tackifier 25 ~ 58 parts, stablizer 0.8 ~ 3 part; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 25% ~ 50%, and surplus is rubber powder, and described activator is environment-friendly rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur.
Above-mentioned a kind of high-viscosity modified asphalt additive, is characterized in that, be made up of the raw material of following weight part: modified host crystal 100 parts, 18 ~ 28 parts, activator, tackifier 35 ~ 48 parts, stablizer 1.0 ~ 2.0 parts.
Above-mentioned a kind of high-viscosity modified asphalt additive, is characterized in that, be made up of the raw material of following weight part: modified host crystal 100 parts, 20 parts, activator, tackifier 42 parts, stablizer 1.2 parts.
Above-mentioned a kind of high-viscosity modified asphalt additive, is characterized in that, described styrol copolymer is star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is 40 ~ 80 orders.
Above-mentioned a kind of high-viscosity modified asphalt additive, is characterized in that, described environment-friendly rubber oil is KN4006 environment-friendly type naphthenic rubber oil.
In addition, present invention also offers a kind of method preparing above-mentioned high-viscosity modified asphalt additive, it is characterized in that, detailed process is: by modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at condition down cut 45min ~ 60min that shearing rate is 4500r/min ~ 5000r/min, be stir under the condition of 150 DEG C ~ 160 DEG C in temperature after shearing, after organic solvent volatilizees completely, granulation obtains high-viscosity modified asphalt additive.
Above-mentioned method, is characterized in that, described organic solvent is acetone.
Above-mentioned method, is characterized in that, the time of described stirring is 60min ~ 80min, and the temperature of described granulation is 140 DEG C ~ 160 DEG C.
Further, present invention also offers a kind of method applied above-mentioned high-viscosity modified asphalt additive and prepare high-viscosity modified asphalt, it is characterized in that, comprise the following steps:
Step one, matrix pitch is heated to 150 DEG C ~ 160 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 6% ~ 14% of matrix pitch quality;
Step 2, mixture described in step one is heated to 175 DEG C ~ 185 DEG C, then be the condition down cut 45min ~ 60min of 4500r/min ~ 5000r/min in shearing rate, be grow 1h ~ 4h under the condition of 175 DEG C ~ 185 DEG C in temperature by described mixture after shearing, obtain the high-viscosity modified asphalt that 60 DEG C of kinetic viscosities are not less than 20000Pas.
Above-mentioned method, is characterized in that, matrix pitch described in step one is 90# pitch.
The present invention compared with prior art has the following advantages:
1, the present invention adopts styrol copolymer, petroleum resin, environment-friendly rubber oil, rubber powder and sulphur to prepare high-viscosity modified asphalt additive as raw material, wherein, adopt environment-friendly rubber oil as activator, independently rubber powder particle and styrol copolymer particle can be made to form elastomeric network, mixed material is made to be homogeneous system, ensure that the height stream of material becomes and ageing-resistant performance, the high-viscosity modified asphalt adopting this high-viscosity modified asphalt additive to prepare further has good high-temperature stability, low-temperature cracking-resistance and ageing-resistant performance concurrently.
2, the high-viscosity modified asphalt adopting high-viscosity modified asphalt additive of the present invention to prepare is applied in the making of porous asphalt pavement, can effectively improve the anti-oxidant of porous asphalt pavement binder and ageing resistance, simple and the better economy of preparation technology, improve the work-ing life of porous asphalt pavement, can be widely used in the making of drainage asphalt pavement.
3, adopt high-viscosity modified asphalt additive of the present invention to prepare high-viscosity modified asphalt compared with existing high-viscosity modified asphalt, have that preparation method is simple, asphalt performance is excellent and the advantage of low production cost.
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Embodiment 1
The present embodiment high-viscosity modified asphalt additive is made up of the raw material of following weight part: modified host crystal 100 parts, 20 parts, activator, tackifier 42 parts, stablizer 1.2 parts; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 40%, surplus is rubber powder, described activator is environment-friendly rubber oil, be preferably KN4006 environment-friendly type naphthenic rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur; Described styrol copolymer is preferably star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is preferably 80 orders.
The detailed process that the present embodiment prepares high-viscosity modified asphalt additive is:
By modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at the condition down cut 60min that shearing rate is 4500r/min, be stir under the condition of 150 DEG C in temperature after shearing, after organic solvent volatilizees completely, obtain solid matter, after granulation, obtain high-viscosity modified asphalt additive; Described organic solvent is preferably acetone, and the consumption of described organic solvent fully dissolves for making tackifier, stablizer and properties-correcting agent mother liquor, and the time of described stirring is preferably 70min, and the temperature of described granulation is preferably 150 DEG C.
The method adopting the present embodiment high-viscosity modified asphalt additive to prepare high-viscosity modified asphalt comprises the following steps:
Step one, matrix pitch is heated to 155 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 7% of matrix pitch quality; Described matrix pitch is preferably SK-90# pitch;
Step 2, mixture described in step one is heated to 180 DEG C, is then the condition down cut 60min of 4500r/min in shearing rate, is grow 2h under the condition of 180 DEG C in temperature by described mixture after shearing, obtains high-viscosity modified asphalt.
According to the testing method of regulation in " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), the Specifications of high-viscosity modified asphalt prepared by embodiment 1 is tested, and contrast with the TPS modifying asphalt adopting ordinary method to prepare, test result is in table 1.
The technical indicator test result of high-viscosity modified asphalt prepared by table 1 embodiment 1
As can be seen from Table 1, high-viscosity modified asphalt indices prepared by Application Example 1 high-viscosity modified asphalt additive all meets technical requirements, its PG high temperature grading is all consistent with TPS modifying asphalt with the classification of PG low temperature, show that it has good high-temperature behavior and stronger anti-rut behavior, and with TPS modifying asphalt, there is suitable low-temperature cracking-resistance and ageing-resistant performance, but the price of high-viscosity modified asphalt prepared by embodiment 1 is much lower compared with TPS modifying asphalt, shows that this high-viscosity modified asphalt has good cost performance.
Embodiment 2
The present embodiment high-viscosity modified asphalt additive is made up of the raw material of following weight part: modified host crystal 100 parts, 18 parts, activator, tackifier 48 parts, stablizer 2.0 parts; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 30%, surplus is rubber powder, described activator is environment-friendly rubber oil, be preferably KN4006 environment-friendly type naphthenic rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur; Described styrol copolymer is preferably star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is preferably 60 orders.
The detailed process that the present embodiment prepares high-viscosity modified asphalt additive is:
By modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at the condition down cut 45min that shearing rate is 5000r/min, be stir under the condition of 160 DEG C in temperature after shearing, after organic solvent volatilizees completely, obtain solid matter, after granulation, obtain high-viscosity modified asphalt additive; Described organic solvent is preferably acetone, and the consumption of described organic solvent fully dissolves for making tackifier, stablizer and properties-correcting agent mother liquor, and the time of described stirring is preferably 80min, and the temperature of described granulation is preferably 160 DEG C.
The method adopting the present embodiment high-viscosity modified asphalt additive to prepare high-viscosity modified asphalt comprises the following steps:
Step one, matrix pitch is heated to 160 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 10% of matrix pitch quality; Described matrix pitch is preferably SK-90# pitch;
Step 2, mixture described in step one is heated to 185 DEG C, is then the condition down cut 50min of 5000r/min in shearing rate, is grow 1h under the condition of 185 DEG C in temperature by described mixture after shearing, obtains high-viscosity modified asphalt.
Embodiment 3
The present embodiment high-viscosity modified asphalt additive is made up of the raw material of following weight part: modified host crystal 100 parts, 28 parts, activator, tackifier 35 parts, stablizer 1.0 parts; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 45%, surplus is rubber powder, described activator is environment-friendly rubber oil, be preferably KN4006 environment-friendly type naphthenic rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur; Described styrol copolymer is preferably star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is preferably 80 orders.
The detailed process that the present embodiment prepares high-viscosity modified asphalt additive is:
By modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at the condition down cut 50min that shearing rate is 4800r/min, be stir under the condition of 150 DEG C in temperature after shearing, after organic solvent volatilizees completely, obtain solid matter, after granulation, obtain high-viscosity modified asphalt additive; Described organic solvent is preferably acetone, and the consumption of described organic solvent fully dissolves for making tackifier, stablizer and properties-correcting agent mother liquor, and the time of described stirring is preferably 60min, and the temperature of described granulation is preferably 140 DEG C.
The method adopting the present embodiment high-viscosity modified asphalt additive to prepare high-viscosity modified asphalt comprises the following steps:
Step one, matrix pitch is heated to 150 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 12% of matrix pitch quality; Described matrix pitch is preferably SK-90# pitch;
Step 2, mixture described in step one is heated to 175 DEG C, is then the condition down cut 55min of 4800r/min in shearing rate, is grow 4h under the condition of 175 DEG C in temperature by described mixture after shearing, obtains high-viscosity modified asphalt.
According to the testing method of regulation in " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), test the related performance indicators of high-viscosity modified asphalt prepared by embodiment 2 and embodiment 3, test result is in table 2.
High-viscosity modified asphalt technical indicator test result prepared by table 2 embodiment 2 and embodiment 3
As can be seen from Table 2, high-viscosity modified asphalt indices prepared by Application Example 2 and embodiment 3 high-viscosity modified asphalt additive all meets technical requirements, there is good high-temperature behavior, stronger anti-rut behavior, excellent low-temperature cracking-resistance and ageing-resistant performance, and the price of the high-viscosity modified asphalt of embodiment 2 and embodiment 3 preparation is lower, shows that this high-viscosity modified asphalt has good cost performance.
Embodiment 4
The present embodiment high-viscosity modified asphalt additive is made up of the raw material of following weight part: modified host crystal 100 parts, 16 parts, activator, tackifier 25 parts, stablizer 0.8 part; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 25%, surplus is rubber powder, described activator is environment-friendly rubber oil, be preferably KN4006 environment-friendly type naphthenic rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur; Described styrol copolymer is preferably star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is preferably 40 orders.
The detailed process that the present embodiment prepares high-viscosity modified asphalt additive is:
By modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at the condition down cut 55min that shearing rate is 4500r/min, be stir under the condition of 155 DEG C in temperature after shearing, after organic solvent volatilizees completely, obtain solid matter, after granulation, obtain high-viscosity modified asphalt additive; Described organic solvent is preferably acetone, and the consumption of described organic solvent fully dissolves for making tackifier, stablizer and properties-correcting agent mother liquor, and the time of described stirring is preferably 70min, and the temperature of described granulation is preferably 150 DEG C.
The method adopting the present embodiment high-viscosity modified asphalt additive to prepare high-viscosity modified asphalt comprises the following steps:
Step one, matrix pitch is heated to 160 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 14% of matrix pitch quality; Described matrix pitch is preferably SK-90# pitch;
Step 2, mixture described in step one is heated to 180 DEG C, is then the condition down cut 45min of 5000r/min in shearing rate, is grow 3h under the condition of 180 DEG C in temperature by described mixture after shearing, obtains high-viscosity modified asphalt.
Embodiment 5
The present embodiment high-viscosity modified asphalt additive is made up of the raw material of following weight part: modified host crystal 100 parts, 32 parts, activator, tackifier 58 parts, stablizer 3 parts; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 50%, surplus is rubber powder, described activator is environment-friendly rubber oil, be preferably KN4006 environment-friendly type naphthenic rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur; Described styrol copolymer is preferably star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is preferably 80 orders.
The detailed process that the present embodiment prepares high-viscosity modified asphalt additive is:
By modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at the condition down cut 60min that shearing rate is 4500r/min, be stir under the condition of 160 DEG C in temperature after shearing, after organic solvent volatilizees completely, obtain solid matter, after granulation, obtain high-viscosity modified asphalt additive; Described organic solvent is preferably acetone, and the consumption of described organic solvent fully dissolves for making tackifier, stablizer and properties-correcting agent mother liquor, and the time of described stirring is preferably 80min, and the temperature of described granulation is preferably 160 DEG C.
The method adopting the present embodiment high-viscosity modified asphalt additive to prepare high-viscosity modified asphalt comprises the following steps:
Step one, matrix pitch is heated to 150 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 6% of matrix pitch quality; Described matrix pitch is preferably SK-90# pitch;
Step 2, mixture described in step one is heated to 175 DEG C, is then the condition down cut 50min of 4500r/min in shearing rate, is grow 2h under the condition of 170 DEG C in temperature by described mixture after shearing, obtains high-viscosity modified asphalt.
According to the testing method of regulation in " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), test the Specifications of high-viscosity modified asphalt prepared by embodiment 4 and embodiment 5, test result is in table 3.
High-viscosity modified asphalt technical indicator test result prepared by table 3 embodiment 4 and embodiment 5
As can be seen from Table 3, high-viscosity modified asphalt indices prepared by Application Example 4 and embodiment 5 high-viscosity modified asphalt additive all meets technical requirements, there is good high-temperature behavior, stronger anti-rut behavior, excellent low-temperature cracking-resistance and ageing-resistant performance, and the price of the high-viscosity modified asphalt of embodiment 4 and embodiment 5 preparation is lower, shows that this high-viscosity modified asphalt has good cost performance.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. a high-viscosity modified asphalt additive, is characterized in that, is made up of the raw material of following weight part: modified host crystal 100 parts, 16 ~ 32 parts, activator, tackifier 25 ~ 58 parts, stablizer 0.8 ~ 3 part; Described modified host crystal is mixed by styrol copolymer and rubber powder, in described modified host crystal, the mass content of styrol copolymer is 25% ~ 50%, and surplus is rubber powder, and described activator is environment-friendly rubber oil, described tackifier are petroleum resin, and described stablizer is sulphur.
2. according to a kind of high-viscosity modified asphalt additive according to claim 1, it is characterized in that, be made up of the raw material of following weight part: modified host crystal 100 parts, 18 ~ 28 parts, activator, tackifier 35 ~ 48 parts, stablizer 1.0 ~ 2.0 parts.
3. according to a kind of high-viscosity modified asphalt additive according to claim 2, it is characterized in that, be made up of the raw material of following weight part: modified host crystal 100 parts, 20 parts, activator, tackifier 42 parts, stablizer 1.2 parts.
4. according to a kind of high-viscosity modified asphalt additive according to claim 1, it is characterized in that, described styrol copolymer is star-like styrene-butadiene-styrene block copolymer, and the granularity of described rubber powder is 40 ~ 80 orders.
5. according to a kind of high-viscosity modified asphalt additive according to claim 1, it is characterized in that, described environment-friendly rubber oil is KN4006 environment-friendly type naphthenic rubber oil.
6. prepare the method for high-viscosity modified asphalt additive as described in claim arbitrary in Claims 1 to 5 for one kind, it is characterized in that, detailed process is: by modified host crystal and activator mix even, obtain properties-correcting agent mother liquor, then tackifier, stablizer and described properties-correcting agent mother liquor are dissolved in organic solvent, at condition down cut 45min ~ 60min that shearing rate is 4500r/min ~ 5000r/min, be stir under the condition of 150 DEG C ~ 160 DEG C in temperature after shearing, after organic solvent volatilizees completely, granulation obtains high-viscosity modified asphalt additive.
7. in accordance with the method for claim 6, it is characterized in that, described organic solvent is acetone.
8. in accordance with the method for claim 6, it is characterized in that, the time of described stirring is 60min ~ 80min, and the temperature of described granulation is 140 DEG C ~ 160 DEG C.
9. application high-viscosity modified asphalt additive as described in claim arbitrary in Claims 1 to 5 prepares a method for high-viscosity modified asphalt, it is characterized in that, comprises the following steps:
Step one, matrix pitch is heated to 150 DEG C ~ 160 DEG C, then high-viscosity modified asphalt additive is added in matrix pitch and stir, obtain mixture; The quality of described high-viscosity modified asphalt additive is 6% ~ 14% of matrix pitch quality;
Step 2, mixture described in step one is heated to 175 DEG C ~ 185 DEG C, then be the condition down cut 45min ~ 60min of 4500r/min ~ 5000r/min in shearing rate, be grow 1h ~ 4h under the condition of 175 DEG C ~ 185 DEG C in temperature by described mixture after shearing, obtain the high-viscosity modified asphalt that 60 DEG C of kinetic viscosities are not less than 20000Pas.
10. in accordance with the method for claim 9, it is characterized in that, matrix pitch described in step one is 90# pitch.
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CN105949800B (en) * 2016-06-03 2018-06-15 杨晓强 A kind of complete molten direct putting type high viscosity property-modifying additive and its preparation process
CN107722648A (en) * 2016-08-12 2018-02-23 交通运输部公路科学研究所 A kind of high-viscosity high-elasticity modified pitch and its preparation and application
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CN108395715A (en) * 2017-02-07 2018-08-14 中国石油化工股份有限公司 A kind of anti-aging high-viscosity asphalt additive and preparation method thereof
CN108395714A (en) * 2017-02-07 2018-08-14 中国石油化工股份有限公司 A kind of high-viscosity asphalt additive and preparation method thereof with anti-aging property
CN106867267A (en) * 2017-02-21 2017-06-20 华北水利水电大学 Porous asphalt pavement preventive maintenance material and preparation method thereof
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CN108948752B (en) * 2017-05-17 2020-12-01 中路交建(北京)工程材料技术有限公司 Special asphalt for permeable pavement, mixture containing same and preparation method
CN107163594A (en) * 2017-05-31 2017-09-15 东南大学 A kind of high viscous rubber combined pitch and preparation method thereof
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CN116444995A (en) * 2023-02-21 2023-07-18 知行良知实业股份有限公司 High-viscosity asphalt and preparation method thereof

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