CN108610529B - Water-soluble graphene modified colored emulsified asphalt and preparation method thereof - Google Patents
Water-soluble graphene modified colored emulsified asphalt and preparation method thereof Download PDFInfo
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- CN108610529B CN108610529B CN201810424996.7A CN201810424996A CN108610529B CN 108610529 B CN108610529 B CN 108610529B CN 201810424996 A CN201810424996 A CN 201810424996A CN 108610529 B CN108610529 B CN 108610529B
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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
- C08L21/00—Compositions of unspecified rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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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
Abstract
The invention discloses water-soluble graphene modified colored emulsified asphalt, which comprises the following components in parts by weight: the water-soluble graphene, the cationic emulsifier, the deionized water and the colored asphalt cement material are calculated by taking the sum of the weight percentage of the four materials as 100%, the water-soluble graphene is 0.1-1%, the cationic emulsifier is 1.5-3.0%, the colored asphalt cement material is 60-65%, and the balance is the deionized water. The invention also discloses a preparation method of the water-soluble graphene modified colored emulsified asphalt. The water-soluble graphene modified colored emulsified asphalt provided by the invention can solve the problems that the polymer is used as a modifier, the performance improvement effect on the emulsified asphalt is not obvious, and the promotion range is limited.
Description
Technical Field
The invention belongs to the technical field of materials used in road engineering, and particularly relates to water-soluble graphene modified colored emulsified asphalt and a preparation method thereof.
Background
Graphene has the advantages of high strength, high thermal conductivity, high electrical conductivity, high thermal and chemical stability, and the like, and thus is a popular material studied in recent years. The water-soluble graphene is used as a two-dimensional crystal, and the anisotropic structure of the water-soluble graphene can form a cross network structure in a liquid dispersion system, so that the stability of the system is enhanced. Water-soluble graphene is a kind of graphene oxide, on which oxygen-containing functional groups and other functional groups make it more active chemical characteristics.
The colored emulsified asphalt is generally a product obtained by emulsifying colored asphalt, the performance of the colored emulsified asphalt is largely determined by the performance of the colored asphalt, and the colored asphalt is generally a mixture prepared by blending aromatic oil, polymer and resin, and the color is generally colorless or light. The color asphalt synthesized by petroleum resin and lubricating oil extract oil has no macromolecular substances such as asphaltene and the like in the traditional asphalt, so that the performance of the color asphalt is different from that of the common petroleum asphalt, especially the high-temperature performance, so that the inherent performance of the color emulsified asphalt is insufficient, and the wide application of the color emulsified asphalt in maintenance sealing layers such as micro-surfacing is limited. In industrial production, high molecular polymers such as SBS, SBR, PE and the like are added, so that the performance of the colored asphalt can be partially improved, and further the performance of the colored emulsified asphalt is improved, but the viscosity of a cementing material is too high due to the fact that the addition amount is too high, high requirements are put forward for emulsifying equipment, the difficulty of an emulsifying process is increased, and the colored emulsified asphalt is not suitable for large-scale popularization and application. Patent application CN 101585952A discloses a color emulsion and a preparation method thereof, wherein a modifier SBR latex is adopted to modify color emulsion asphalt, and when the color emulsion asphalt is used for micro-surfacing, the high-temperature stability and the low-temperature crack resistance of a sealing layer can be obviously improved. However, the improvement of the performance of the colored emulsified asphalt is limited by the mixing amount of the SBR latex, and the improvement effect is limited. Besides selecting proper organic polymer materials, the performance of the colored emulsified asphalt can be improved and enhanced by increasing the solid content of the emulsified asphalt. Patent application CN104356588A discloses a high-concentration colored emulsified asphalt and a preparation method thereof, wherein the high-concentration colored emulsified asphalt is composed of high aromatic oil, petroleum resin, a modifier, an emulsifier, a colorant and water, and has the characteristics of convenient transportation, good economic benefit and the like, but the preparation of the high-concentration colored emulsified asphalt needs to develop a special emulsifier, has high technical requirements and is not beneficial to popularization and utilization. CN 105801005A discloses a method for preparing a color micro-surfacing based on resin modified emulsified asphalt, wherein light-color resin modified asphalt comprises extract oil, rosin resin, a viscosity reducer, SBS and the like, but the micro-surfacing prepared by the method has poor durability due to the poor inherent aging resistance of the resin, and cannot be used for high-grade pavements.
At present, most of researches on colored emulsified asphalt use polymers as modifiers, the overall improvement effect on the performance of the emulsified asphalt is not remarkable, and the promotion range is limited.
Disclosure of Invention
The invention aims to provide water-soluble graphene modified colored emulsified asphalt, which solves the problems that the performance improvement effect of emulsified asphalt is not obvious and the improvement range is limited when a polymer is used as a modifier.
The invention also provides a preparation method of the water-soluble graphene modified colored emulsified asphalt.
The technical scheme provided by the invention is as follows:
a water-soluble graphene-modified colored emulsified asphalt, comprising:
the water-soluble graphene, the cationic emulsifier, the deionized water and the colored asphalt cement material are calculated by taking the sum of the weight percentage of the four materials as 100%, the water-soluble graphene is 0.1-1%, the cationic emulsifier is 1.5-3.0%, the colored asphalt cement material is 60-65%, and the balance is the deionized water.
Further, the solubility of the water-soluble graphene in an aqueous phase system is more than 10 mg/ml.
Further, after the water-soluble graphene is dissolved in an aqueous phase system, the stability is maintained for more than three months.
Further, the cationic emulsifier is a slow-breaking and quick-setting emulsifier.
Further, the colored asphalt cement is prepared by high-temperature melting and shearing of industrial resin, SBS and extract oil, and the sum of the mass percent is 100%, the industrial resin accounts for 30% -40%, SBS accounts for 5% -8%, and the extract oil accounts for 55% -65%.
Further, the extract oil is rubber oil.
The preparation method of the water-soluble graphene modified colored emulsified asphalt comprises the following steps:
step 1, heating deionized water to 60-70 ℃, adding an acid agent, and adjusting the pH value of an aqueous solution to 2.5-3;
step 2, adding the weighed water-soluble graphene into the aqueous solution, and re-correcting the pH value of the solution to be within the range of 2.5-3 through the acid agent;
and 3, heating the colored asphalt cement to 150-165 ℃, and carrying out high-speed shearing together with the solution obtained in the step 2 to obtain the water-soluble graphene modified colored emulsified asphalt.
Further, the acidic agent is hydrochloric acid.
Further, in step 2, after the weighed water-soluble graphene is added into the aqueous solution, the water-soluble graphene is uniformly dispersed by ultrasound.
Further, in step 3, the high speed shearing is performed in a colloid mill.
The water-soluble graphene modified colored emulsified asphalt and the preparation method thereof provided by the invention can bring at least one of the following beneficial effects:
1. according to the water-soluble graphene modified colored emulsified asphalt, the water-soluble graphene is used as a modifier to modify the colored emulsified asphalt, so that the high-temperature performance and the adhesion of a micro-surfacing mixture prepared from the emulsified asphalt can be obviously improved, and the anti-rutting capability of a colored seal layer is greatly improved.
2. The indexes of the softening point of the evaporation residue of the colored emulsified asphalt obtained by the invention exceed 60 ℃, the penetration index PI is more than 0, the ductility at 5 ℃ exceeds 20cm, and the colored emulsified asphalt has good high-temperature performance and aging resistance, and all the indexes meet the technical requirements of the industry standard urban road colored asphalt concrete pavement technical specification (CJJ/T218-2014) on the colored emulsified asphalt. In a word, the micro-surfacing mixture prepared by the water-soluble graphene modified colored emulsified asphalt can meet the requirements of maintenance and repair of high-grade colored pavements, and the emulsified asphalt has a simple formula and is convenient to prepare.
Detailed Description
The invention relates to water-soluble graphene modified colored emulsified asphalt, which is modified by taking water-soluble graphene as a modifier and comprises the following components in percentage by mass: 0.1-1% of water-soluble graphene, 1.5-3.0% of cationic emulsifier, 60-65% of color asphalt cement and the balance of deionized water.
The water-soluble graphene belongs to a nano two-dimensional structure material, and the nano material has excellent performances such as small-size effect and surface effect. The water-soluble graphene-modified colored emulsified asphalt is different from polymer-modified colored emulsified asphalt in that the water-soluble graphene has good dispersibility in water, so that the water-soluble graphene-modified colored emulsified asphalt can improve the evaporation residue performance of the emulsified asphalt from a microstructure.
By referring to the performance index of the polymer modified colored emulsified asphalt and considering the special effect and cost of the graphene nano material, the water-soluble graphene can be determined to be graphene oxide, and the content of the graphene oxide is 0.1-1%.
Preferably, the water-soluble graphene has a solubility of more than 10mg/ml in an aqueous phase system and can be stably stored for more than three months.
Preferably, the cationic emulsifier is a slow-breaking fast-setting emulsifier.
Preferably, the colored asphalt cement is prepared by high-temperature melting and shearing of industrial resin, SBS and extract oil, and the sum of the mass percent is 100%, the industrial resin accounts for 30% -40%, the SBS accounts for 5% -8%, and the extract oil accounts for 55% -65%. The extract oil may be rubber oil.
The preparation method of the water-soluble graphene modified colored emulsified asphalt specifically comprises the following steps:
(1) heating deionized water to 60-70 ℃, adding an acid agent (such as hydrochloric acid), and adjusting the pH value of the aqueous solution to 2.5-3;
(2) adding the weighed water-soluble graphene into the aqueous solution, performing ultrasonic dispersion until the graphene is uniformly dispersed, and re-correcting the pH value of the solution to be within the range of 2.5-3;
(3) heating the colored asphalt cement to 150-165 ℃, adding the colored asphalt cement and the solution into a colloid mill together, and carrying out high-speed shearing to obtain the water-soluble graphene modified colored emulsified asphalt.
Taking prepared common color emulsified asphalt. The common color emulsified asphalt selected in the experiment is obtained by emulsifying the following color asphalt cement material which is prepared by melting and shearing industrial resin, SBS and extract oil at high temperature (150-165 ℃), wherein the total mass percentage is 100%, the industrial resin is 30-40%, the SBS is 5-8%, and the rubber oil is 55-65%; the performance index of the evaporation residue of the common colored emulsified asphalt is tested, and the softening point is measured to be 52 ℃, the penetration index PI is measured to be-0.7, and the ductility at 5 ℃ is measured to be 15 cm.
The water-soluble graphene for modification meets the quality requirement that the solubility in an aqueous phase system is more than 10mg/ml and the graphene can be stably stored for more than three months.
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited to the following examples, which are specifically shown in table 1.
TABLE 1 composition of modified system for experiment
Performance characterization
Firstly, the colored emulsified asphalt of the examples 1 to 5 is prepared respectively as follows: heating deionized water to 60-70 ℃, adding hydrochloric acid, and adjusting the pH value of the aqueous solution to 2.5-3; adding the weighed water-soluble graphene into the aqueous solution, performing ultrasonic dispersion until the graphene is uniformly dispersed, and re-correcting the pH value of the solution to be within the range of 2.5-3; heating the colored asphalt cement to 150-165 ℃, adding the colored asphalt cement and the solution into a colloid mill together, and carrying out high-speed shearing to obtain the water-soluble graphene modified colored emulsified asphalt.
The colored emulsified asphalt of the comparative example and the water-soluble graphene modified colored emulsified asphalt of examples 1 to 5 were subjected to an emulsified asphalt evaporation residue test using JTG/E20-2011(T0651), the evaporation residue was subjected to a softening point test using JTG/E20-2011(T0606), the penetration was tested using JTG/E20-2011(T0604), the penetration index PI was calculated according to specifications, and the ductility was tested using JTG/E20-2011(T0605), and the specific experimental results are shown in table 2. And preparing a micro-surfacing mixture by using the colored emulsified asphalt of the comparative example and the examples 1-5 and adopting JTG/E20-2011(T0752) to carry out a wet wheel abrasion test and a rutting deformation test, wherein the mineral aggregate grading adopts MS-3 type grading in JTG F40-2004, the cement content accounts for 1.5% of the total weight of the mineral aggregate, the emulsified asphalt content accounts for 10% of the total weight of the mineral aggregate, the water content accounts for 4% of the total weight of the mineral aggregate, and the abrasion value (WTAT) and the rutting width deformation rate (PLD) of 1h of immersed water are measured, and the results are shown in Table 3.
TABLE 2 characterization results of evaporation residue properties
TABLE 3 micro-surfacing mixture Performance characterization results
As can be seen from the test results in Table 2, the softening point indexes of the five examples exceed 60 ℃, and the high-temperature performance of the five examples is obviously improved after modification; in addition, the ductility at 5 ℃ of the five examples exceeds 20cm, the PI indexes are all larger than 0, and the ageing resistance of the five examples is obviously improved after modification. The indexes all meet the technical requirements of the industrial standard 'urban road colorful asphalt concrete pavement technical regulation' (CJJ/T218-2014) on colorful emulsified asphalt, and compared with the technical requirements that the comparative example has the softening point index of 52 ℃, the 5 ℃ ductility of 15cm, the ductility of 55 ℃ lower than the softening point and the ductility of 5 ℃ more than or equal to 20cm, and the penetration index of-0.7 and poor temperature sensitivity.
As shown in Table 3, the wet wheel wear value of the micro-surfacing mixture prepared from the common colored emulsified asphalt after being soaked in water for 1h is only 550g/m2Is lower than 520g/m of color micro-surfacing in technical Specification for colored asphalt concrete pavement of urban road (CJJ/T218-2014)2And the wet wheel abrasion values of the five examples after being soaked in water for 1h are all less than 500g/m2。
As shown in Table 3, the micro-surfacing compound prepared from the common colored emulsified asphalt has the rutting width deformation rate PLD of 10.4 percent, which is much higher than the technical requirement of the technical specification of the colored asphalt concrete pavement of urban roads (CJJ/T218-2014) for less than 5 percent of the colored micro-surfacing, and the rutting width deformation rate PLD of the five examples is less than 5 percent.
The table 2 and the table 3 jointly show that the micro-surfacing mixture prepared from the water-soluble graphene modified colored emulsified asphalt provided by the invention has good high-temperature performance and adhesiveness, and the anti-rutting capability of the colored micro-surfacing can be greatly improved.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The preparation method of the water-soluble graphene modified colored emulsified asphalt is characterized by comprising the following steps:
step 1, heating deionized water to 60-70 ℃, adding an acid agent, and adjusting the pH value of an aqueous solution to 2.5-3;
step 2, adding the weighed water-soluble graphene into the aqueous solution, and re-correcting the pH value of the solution to be within the range of 2.5-3 through the acid agent;
step 3, heating the colored asphalt cement to 150-165 ℃, and carrying out high-speed shearing together with the solution obtained in the step 2 to obtain water-soluble graphene modified colored emulsified asphalt;
the step 3 also comprises a cationic emulsifier;
the sum of the weight percentages of the water-soluble graphene, the cationic emulsifier, the deionized water and the colored asphalt cement in the steps is 100 percent, the water-soluble graphene accounts for 0.1 to 1 percent, the cationic emulsifier accounts for 1.5 to 3.0 percent, the colored asphalt cement accounts for 60 to 65 percent, and the balance is the deionized water; the colored asphalt cement is prepared by melting and shearing industrial resin, SBS and extract oil at high temperature, wherein the sum of the mass percent is 100%, the industrial resin accounts for 30% -40%, the SBS accounts for 5% -8%, and the extract oil accounts for 55% -65%;
wherein the solubility of the water-soluble graphene in an aqueous phase system is more than 10 mg/ml; after the water-soluble graphene is dissolved in the water phase system, the stability is kept for more than three months.
2. The preparation method of the water-soluble graphene modified colored emulsified asphalt according to claim 1, which is characterized in that:
the cationic emulsifier is a slow-breaking and quick-setting emulsifier.
3. The preparation method of the water-soluble graphene modified colored emulsified asphalt according to claim 1, which is characterized in that:
the extract oil is rubber oil.
4. The preparation method of the water-soluble graphene modified colored emulsified asphalt according to claim 1, which is characterized in that:
the acid agent is hydrochloric acid.
5. The preparation method of the water-soluble graphene modified colored emulsified asphalt according to claim 1, which is characterized in that:
in the step 2, after the weighed water-soluble graphene is added into the aqueous solution, the water-soluble graphene is uniformly dispersed by ultrasonic.
6. The preparation method of the water-soluble graphene modified colored emulsified asphalt according to claim 1, which is characterized in that:
in step 3, the high speed shearing is performed in a colloid mill.
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| CN112280322A (en) * | 2020-11-03 | 2021-01-29 | 上海浦兴路桥建设工程有限公司 | MXene modified color asphalt binder and preparation method thereof |
| CN115536325A (en) * | 2021-06-30 | 2022-12-30 | 江苏苏博特新材料股份有限公司 | Graphene modified emulsified asphalt-cement-based composite railway ballast elastic curing grouting material and preparation method and application thereof |
| CN117106314A (en) * | 2023-10-20 | 2023-11-24 | 广东路面博士交通科技有限公司 | Block copolymer-nano composite modified emulsified asphalt and preparation method thereof |
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