CN112608604A - Preparation method of graphene modified emulsified asphalt - Google Patents
Preparation method of graphene modified emulsified asphalt Download PDFInfo
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- CN112608604A CN112608604A CN202011235618.8A CN202011235618A CN112608604A CN 112608604 A CN112608604 A CN 112608604A CN 202011235618 A CN202011235618 A CN 202011235618A CN 112608604 A CN112608604 A CN 112608604A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- 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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Abstract
The invention discloses a preparation method of graphene modified emulsified asphalt, which comprises the following steps: (1) preparing graphene slurry; (2) adding NaOH and monochloroacetic acid, fully reacting, removing impurity ions, and vacuum drying; (3) stirring and mixing the dried substance and absolute ethyl alcohol, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane for reaction, and centrifugally drying; (4) mixing the dried product of the last step, alkyl glycoside, polyvinyl alcohol, boric acid ester and polymethyl methacrylate to obtain premix; (5) thermally mixing the premix, the styrene segmented copolymer and the polyurethane, and then mixing the mixture with the waste rubber powder; (6) melting the substrate asphalt, adding the SBS modifier and the rubber powder, fully mixing and dissolving, and adding the mixed material for swelling; (7) and after the shearing is finished, continuously swelling until the preparation is finished. The asphalt prepared by the preparation method disclosed by the invention has good physical and chemical properties at high, medium and low temperatures, can adapt to various environments, and keeps the long-term stability of quality.
Description
Technical Field
The invention relates to the field of chemical materials, and particularly relates to a preparation method of graphene modified emulsified asphalt.
Background
The road construction is an important index for measuring the development of national economy, and the road construction in China has been greatly developed in recent years. In all highway construction mileage, asphalt pavement occupies most of the highway construction mileage, however, in the face of a series of current situations such as gradual increase of highway traffic flow, improvement of vehicle driving speed, increase of heavy load quantity and the like in China, the pavement structure is firstly damaged to be the surface functional layer, so that not only can the defects such as cracks, looseness, crazing, pits and the like be generated, but also the skid resistance, the leveling performance and the noise performance of the pavement are seriously damaged, the driving safety and the comfort cannot be guaranteed, but at present, the maintenance method aiming at the damage of the pavement functional layer is mostly as follows: (1) milling and planing the original pavement, and then performing overlay treatment; (2) and directly laying a layer of the cover layer thick surface on the functional layer. However, the two maintenance methods have great disadvantages, which are not only unfavorable for environmental protection and waste of a large amount of manpower and material resources, but also long in maintenance period and easy to cause traffic jam. Therefore, a maintenance mode which can effectively prolong the service life of the asphalt pavement, recover the use function of the asphalt pavement and efficiently and reasonably utilize resources is urgently needed to ensure the service quality of the road.
Because the common road asphalt has the defects of easy softening at high temperature, easy brittle fracture at low temperature, easy fatigue fracture at medium temperature and poor elasticity, the preparation method of the asphalt with excellent high, medium and low temperature performances and good elasticity is required to be found, and the preparation method has very important significance.
Disclosure of Invention
In order to solve the above technical problems, the present invention aims to invent a novel asphalt preparation method.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the preparation method of the graphene modified emulsified asphalt sequentially comprises the following steps:
(1) mixing and stirring graphene and water, and then carrying out homogenization treatment to obtain graphene slurry;
(2) adding NaOH and monochloroacetic acid, carrying out ultrasonic full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying to obtain dry powder A;
(3) stirring and mixing the dry powder A and absolute ethyl alcohol, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting in a water bath at a constant temperature, and centrifugally drying to obtain powder B;
(4) mixing the powder B, alkyl glycoside, polyvinyl alcohol, boric acid ester and polymethyl methacrylate to obtain a premix;
(5) thermally mixing the premix, the styrene segmented copolymer and the polyurethane, and then mixing the mixture with the waste rubber powder;
(6) heating and melting the substrate asphalt, adding the SBS modifier and the rubber powder, fully mixing and dissolving, adding the mixed material obtained in the step (5), and fully swelling;
(7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
Preferably, in the step (1), the graphene is mixed with water, specifically, 1 part by mass of graphene is mixed with 1000 parts by mass of water.
Preferably, in the step (1), for every 1 part by mass of graphene, 60 parts by mass of NAOH and 50 parts by mass of monochloroacetic acid are added in the step (2).
Preferably, in the step (2), the vacuum drying temperature is 65 ℃.
Preferably, in the step (3), the mass ratio of the dry powder A to the absolute ethyl alcohol is 1: 100.
Preferably, in the step (3), the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is added in the same amount as the dry powder A.
Preferably, in the step (3), the water bath temperature is 50 ℃, the reaction time is 24h, and the drying temperature is 65 ℃.
Preferably, in the step (4), the powder B, the alkyl glycoside, the polyvinyl alcohol, the boric acid ester and the polymethyl methacrylate are 1: 0.8: 1: 2: 1 in mass ratio.
Preferably, in the step (5), the mass ratio of premix: styrene-based block copolymer: polyurethane 5.8: 1: 4.
Preferably, in the step (6), the mass ratio of the base asphalt, the SBS modifier, the rubber powder and the mixed material is (85-90): (2-6): (2-8): (1-5).
The invention has the beneficial effects that: the preparation method improves the asphalt preparation process, so that the asphalt prepared by the method has good physical and chemical properties at high, medium and low temperatures, can adapt to various environments, and keeps the quality stable for a long time.
Detailed Description
The following further illustrates embodiments of the invention:
example 1
Preparing graphene emulsified asphalt according to the following steps: (1) mixing and stirring 100g of graphene and 100kg of water, and homogenizing to obtain graphene slurry; (2) adding 6kg of NaOH and 5kg of monochloroacetic acid, carrying out ultrasonic treatment for 3h, carrying out full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying at 65 ℃ to obtain dry powder A; (3) stirring and mixing 10g of the dry powder A and 1000g of absolute ethyl alcohol, adding 10g of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting for 24 hours in a water bath at the constant temperature of 50 ℃, centrifuging, and drying at 65 ℃ to obtain powder B; (4) mixing 20g of powder B, 16g of alkyl glycoside, 20g of polyvinyl alcohol, 40g of boric acid ester and 20g of polymethyl methacrylate to obtain a premix; (5) mixing 116g of premix, 20g of styrene block copolymer and 20g of polyurethane by heating, and mixing with 80g of waste rubber powder; (6) heating and melting 1.8kg of base asphalt, adding 120g of SBS modifier and 160g of rubber powder, fully mixing, adding 100g of the mixed material in the step (5), and fully swelling; (7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
Example 2
Preparing graphene emulsified asphalt according to the following steps: (1) mixing and stirring 100g of graphene and 100kg of water, and homogenizing to obtain graphene slurry; (2) adding 6kg of NaOH and 5kg of monochloroacetic acid, carrying out ultrasonic treatment for 3h, carrying out full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying at 65 ℃ to obtain dry powder A; (3) stirring and mixing 10g of the dry powder A and 1000g of absolute ethyl alcohol, adding 10g of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting for 24 hours in a water bath at the constant temperature of 50 ℃, centrifuging, and drying at 65 ℃ to obtain powder B; (4) mixing 20g of powder B, 16g of alkyl glycoside, 20g of polyvinyl alcohol, 40g of boric acid ester and 20g of polymethyl methacrylate to obtain a premix; (5) mixing 116g of premix, 20g of styrene block copolymer and 20g of polyurethane by heating, and mixing with 80g of waste rubber powder; (6) heating and melting 8.5kg of base asphalt, adding 200g of SBS modifier and 200g of rubber powder, fully mixing, adding 100g of the mixed material in the step (5), and fully swelling; (7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
Example 3
Preparing graphene emulsified asphalt according to the following steps: (1) mixing and stirring 100g of graphene and 100kg of water, and homogenizing to obtain graphene slurry; (2) adding 6kg of NaOH and 5kg of monochloroacetic acid, carrying out ultrasonic treatment for 3h, carrying out full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying at 65 ℃ to obtain dry powder A; (3) stirring and mixing 10g of the dry powder A and 1000g of absolute ethyl alcohol, adding 10g of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting for 24 hours in a water bath at the constant temperature of 50 ℃, centrifuging, and drying at 65 ℃ to obtain powder B; (4) mixing 20g of powder B, 16g of alkyl glycoside, 20g of polyvinyl alcohol, 40g of boric acid ester and 20g of polymethyl methacrylate to obtain a premix; (5) mixing 116g of premix, 20g of styrene block copolymer and 20g of polyurethane by heating, and mixing with 80g of waste rubber powder; (6) heating and melting 9.0kg of base asphalt, adding 600g of SBS modifier and 800g of rubber powder, fully mixing, adding 100g of the mixed material in the step (5), and fully swelling; (7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
Comparative example 1
Preparing graphene emulsified asphalt according to the following steps: mixing 20g of graphene, 16g of alkyl glycoside, 20g of polyvinyl alcohol, 40g of boric acid ester and 20g of polymethyl methacrylate to obtain a premix; mixing 116g of premix, 20g of styrene block copolymer and 20g of polyurethane by heating, and mixing with 80g of waste rubber powder; heating and melting 8.5kg of base asphalt, adding 200g of SBS modifier and 200g of rubber powder, fully mixing, adding 100g of mixed material, and fully swelling; and after shearing, continuously swelling for 1-2 h to finish the preparation.
Comparative example 2
Preparing graphene emulsified asphalt according to the following steps: (1) mixing and stirring 100g of graphene and 100kg of water, and homogenizing to obtain graphene slurry; (2) adding 6kg of NaOH and 5kg of monochloroacetic acid, carrying out ultrasonic treatment for 3h, carrying out full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying at 65 ℃ to obtain dry powder A; (3) stirring and mixing 10g of the dry powder A and 1000g of absolute ethyl alcohol, adding 10g of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting for 24 hours in a water bath at the constant temperature of 50 ℃, centrifuging, and drying at 65 ℃ to obtain powder B; (4) mixing 20g of powder B, 16g of alkyl glycoside, 20g of polyvinyl alcohol, 40g of boric acid ester and 20g of polymethyl methacrylate to obtain a premix; (5) mixing 116g of premix, 20g of styrene block copolymer and 20g of polyurethane by heating, and mixing with 80g of waste rubber powder; (6) heating and melting 1.3kg of matrix asphalt, adding 100g of the mixed material obtained in the step (5), and fully swelling; (7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
The base asphalt, the comparative examples and the examples are tested, and the indexes are shown in the following table:
table 1: base asphalt
TABLE 2
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The preparation method of the graphene modified emulsified asphalt is characterized by comprising the following steps of:
(1) mixing and stirring graphene and water, and then carrying out homogenization treatment to obtain graphene slurry;
(2) adding NaOH and monochloroacetic acid, carrying out ultrasonic full reaction, carrying out hot filtration on the solution to remove impurity ions, carrying out centrifugal separation, and carrying out vacuum drying to obtain dry powder A;
(3) stirring and mixing the dry powder A and absolute ethyl alcohol, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reacting in a water bath at a constant temperature, and centrifugally drying to obtain powder B;
(4) mixing the powder B, alkyl glycoside, polyvinyl alcohol, boric acid ester and polymethyl methacrylate to obtain a premix;
(5) thermally mixing the premix, the styrene segmented copolymer and the polyurethane, and then mixing the mixture with the waste rubber powder;
(6) heating and melting the substrate asphalt, adding the SBS modifier and the rubber powder, fully mixing and dissolving, adding the mixed material obtained in the step (5), and fully swelling;
(7) and after shearing, continuously swelling for 1-2 h to finish the preparation.
2. The production method according to claim 1, wherein in the step (1), the graphene is mixed with water, specifically, 1 part by mass of the graphene is mixed with 1000 parts by mass of water.
3. The production method according to claim 1, wherein in the step (1), for every 1 part by mass of graphene added, 60 parts by mass of NAOH and 50 parts by mass of monochloroacetic acid are added in the step (2).
4. The production method according to claim 1, wherein in the step (2), the vacuum drying temperature is 65 ℃.
5. The method according to claim 1, wherein in the step (3), the mass ratio of the dry powder A to the absolute ethyl alcohol is 1: 100.
6. The method according to claim 1, wherein in the step (3), the gamma- (2, 3-glycidoxy) propyltrimethoxysilane is added in an amount equal to the mass of the dry powder A.
7. The preparation method according to claim 1, wherein in the step (3), the water bath temperature is 50 ℃, the reaction time is 24 hours, and the drying temperature is 65 ℃.
8. The process according to claim 1, wherein in the step (4), the ratio by mass of powder B to the alkylglycoside to the polyvinyl alcohol to the boric acid ester to the polymethyl methacrylate is 1: 0.8: 1: 2: 1.
9. The method according to claim 1, wherein in the step (5), the mass ratio of the premix to the styrenic block copolymer to the polyurethane is 5.8: 1: 4.
10. The production method according to claim 1, wherein in the step (6), the matrix pitch is, in terms of mass ratio: the SBS modifier, the rubber powder and the mixed material are (85-90): (2-6): (2-8): 1-5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117466563A (en) * | 2023-12-28 | 2024-01-30 | 水润天府新材料有限公司 | Process for producing recyclable asphalt mixture with added waste rubber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073898A (en) * | 2012-12-26 | 2013-05-01 | 上海浦东路桥建设股份有限公司 | Environment-friendly vulcanizing material modifier for drainage asphalt roads and preparation method thereof |
| CN106147252A (en) * | 2014-11-03 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of preparation method of environment-friendly type asphalt mixture additive |
| CN107245247A (en) * | 2017-05-19 | 2017-10-13 | 同济大学 | Polyethylene modified asphalt based on carboxy-modified graphene oxide and preparation method thereof |
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2020
- 2020-11-06 CN CN202011235618.8A patent/CN112608604A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073898A (en) * | 2012-12-26 | 2013-05-01 | 上海浦东路桥建设股份有限公司 | Environment-friendly vulcanizing material modifier for drainage asphalt roads and preparation method thereof |
| CN106147252A (en) * | 2014-11-03 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of preparation method of environment-friendly type asphalt mixture additive |
| CN107245247A (en) * | 2017-05-19 | 2017-10-13 | 同济大学 | Polyethylene modified asphalt based on carboxy-modified graphene oxide and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117466563A (en) * | 2023-12-28 | 2024-01-30 | 水润天府新材料有限公司 | Process for producing recyclable asphalt mixture with added waste rubber |
| CN117466563B (en) * | 2023-12-28 | 2024-03-19 | 水润天府新材料有限公司 | Process for producing recyclable asphalt mixture with added waste rubber |
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Application publication date: 20210406 |