CN114806189A - Environment-friendly asphalt biological regenerant and preparation method thereof - Google Patents
Environment-friendly asphalt biological regenerant and preparation method thereof Download PDFInfo
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- CN114806189A CN114806189A CN202210277135.7A CN202210277135A CN114806189A CN 114806189 A CN114806189 A CN 114806189A CN 202210277135 A CN202210277135 A CN 202210277135A CN 114806189 A CN114806189 A CN 114806189A
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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
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
Abstract
The invention discloses an environment-friendly asphalt biological regenerant and a preparation method thereof, wherein the method comprises the following steps: preheating a reaction kettle to 80-100 ℃, adding 50-70 parts by weight of bio-oil into the reaction kettle, and carrying out first stirring to obtain treated bio-oil; adding 15-25 parts by weight of activated rubber powder and 10-15 parts by weight of polyphosphoric acid into the treated bio-oil for second stirring to obtain a mixture; and sequentially adding 3-5 parts by weight of ultraviolet absorbent and 1-5 parts by weight of plasticizer into the mixture for third stirring, and then cooling to room temperature to obtain the environment-friendly asphalt biological regenerant. The environment-friendly asphalt biological regenerant is high in environment friendliness and simple in process, can improve the pavement performance of a regenerated asphalt mixture, and effectively improves the service life and performance of an asphalt material.
Description
Technical Field
The invention relates to the technical field of road engineering materials, in particular to an environment-friendly asphalt biological regenerant and a preparation method thereof.
Background
The asphalt is aged in the long-term service process, and the performance is attenuated. By using a special regenerant or new asphalt in the aged asphalt for blending or combining the two modes, the properties of the aged asphalt can be restored, the problem of recycling of waste asphalt pavement materials is effectively solved, transitional capture of resources can be reduced, resource saving and intensive utilization are promoted, the implementation of carbon peak reaching and carbon neutralization targets is promoted, and the implementation of policies such as ecological civilization construction and strong traffic countries is supported.
CN 111138265A discloses a preparation method of a bio-based regenerant, which adopts a high-pressure saponification method to synthesize unsaturated vegetable oleic acid, and then adds the unsaturated vegetable oleic acid, natural cashew nut shell oil, a dehydrating agent and an antioxidant into a glass reaction kettle to prepare the bio-based regenerant. The utilization rate of old materials can be obviously improved, and meanwhile, the asphalt prepared by using the bio-based regenerant still has good penetration and ductility, and the pavement performance is improved. However, this saponification method has low production efficiency and high energy and water consumption. In addition, the process also has the defects of environmental pollution, difficult sewage treatment and the like;
CN 111635638A discloses a preparation method of a vegetable oil foot asphalt regenerant: firstly, distilling and dehydrating plant oil residue; secondly, adding acetone into the dehydrated oil residue, and performing solid-liquid separation to collect solid phase substances which are phospholipid materials in the oil residue; thirdly, the liquid phase mixture is placed in a distillation device for distillation; fourthly, adding methanol into the mixed solution, and then adding solid sodium hydroxide as a catalyst for reaction; fifthly, distilling the reaction liquid to obtain the effective component of the regenerant; sixthly, fusing and stirring the matrix asphalt and the effective components of the regenerant. The invention converts fatty acid substances in the oil residue into fatty acid esters, removes molecular polar groups and improves the diffusion performance of the vegetable oil residue regenerant. However, the method has high requirements on the process, the temperature, the vacuum degree, the time, the stirring mode and the like during the oil residue treatment directly influence the yield and the quality, and the acetone solvent has the defects of high cost, flammability and explosiveness, poor taste of the extracted product and the like.
In summary, although these regenerants can effectively regenerate waste asphalt to a certain extent, the respective disadvantages of complex process and environmentally-friendly materials exist, and for the asphalt biological regenerant, an efficient and economical preparation method of an environmentally-friendly asphalt biological regenerant is urgently developed.
Disclosure of Invention
The invention aims to provide an environment-friendly asphalt biological regenerant and a preparation method thereof, the environment-friendly asphalt biological regenerant has high environment-friendly property and simple process, can improve the road performance of a regenerated asphalt mixture, and effectively improves the service life and the performance of an asphalt material.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, a method for preparing an environment-friendly asphalt biorenewable agent is provided, the method comprising:
preheating a reaction kettle to 80-100 ℃, adding 50-70 parts by weight of bio-oil into the reaction kettle, and carrying out first stirring to obtain treated bio-oil;
adding 15-25 parts by weight of activated rubber powder and 10-15 parts by weight of polyphosphoric acid into the treated bio-oil for second stirring to obtain a mixture;
and sequentially adding 3-5 parts by weight of ultraviolet absorbent and 1-5 parts by weight of plasticizer into the mixture for third stirring, and then cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
Further, the bio-oil comprises at least one of rubber oil, coal tar, fuel oil, lubricating oil, vegetable oil, naphthenic oil, furfural extract oil, and deasphalted oil.
Further, the activated rubber powder is obtained by activating waste rubber powder; the method for activating the waste rubber powder comprises the following steps:
soaking waste rubber powder in a sodium hypochlorite solution, and uniformly stirring to obtain activated rubber powder, wherein the sodium hypochlorite solution is prepared from sodium chlorate and deionized water (0.8-1.2): 1 proportion.
Further, the ultraviolet absorber includes at least one of tert-butyl salicylate, phenyl salicylate, and 2-hydroxy-4-methoxybenzophenone.
Further, the plasticizer includes at least one of dioctyl phthalate, dibutyl maleate, trioctyl trimellitate, and citrate esters.
Further, the first agitating includes: stirring for 5-10 min at a rotation speed of 500-700 rpm.
Further, the second stirring includes: shearing at 3000-5000 rpm for 30-60 min.
Further, the third agitating includes: shearing at 1000-2000 rpm for 10-20 min.
In the second aspect of the invention, the invention provides an environment-friendly asphalt bioremediation agent obtained by the method.
In a third aspect of the present invention, there is provided a reclaimed asphalt, wherein a raw material for preparing the reclaimed asphalt comprises: 10-20 parts by weight of the environment-friendly asphalt biorenewant as claimed in claim 9 and 100 parts by weight of recycled waste SBS asphalt.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
according to the environment-friendly asphalt biological regenerant and the preparation method thereof, the bio-oil component is compounded with the activated waste rubber powder and polyphosphoric acid, and the bio-oil can supplement oil components lost due to aging of asphalt, so that the colloid structure of the aged asphalt is adjusted, and the rubber powder can be softened and a sulfur bridge structure can be swelled under the action of the bio-oil component and the rubber powder, so that the blending of the rubber powder and the asphalt is promoted.
Activated waste rubber powder and polyphosphoric acid are utilized to perform chemical reaction with unsaturated bonds in asphalt to generate a stable chemical structure, and polyphosphoric acid forms an interconnected network in the asphalt, so that a co-woven network structure formed by rubber powder modified asphalt is developed, and the low-temperature crack resistance and fatigue resistance of the asphalt are further improved.
The environment-friendly asphalt biological regenerant prepared by the invention can effectively improve the rutting resistance (the rutting deformation range is 1.684-1.765 in 60 min), the fatigue resistance (the number of fatigue life is 486026-623445) and the low-temperature crack resistance (the ductility range at 5 ℃ is 50.1-59.8 cm), and further improve the road performance of the regenerated asphalt.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a method for preparing an environment-friendly asphalt biorenewant provided by the invention.
Detailed Description
The present invention will be specifically explained below in conjunction with specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly presented thereby. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be obtained by an existing method. The steps S1, S2, and S3 … … in the present invention do not represent a strict order relationship, and the order may be appropriately adjusted as necessary.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to an exemplary embodiment of the present invention, there is provided a method for preparing an environment-friendly asphalt biorenewable agent, as shown in fig. 1, the method including:
step S1, preheating a reaction kettle to 80-100 ℃, adding 50-70 parts by weight of bio-oil into the reaction kettle, and carrying out first stirring to obtain treated bio-oil;
in the technical proposal, the device comprises a base,
the first stirring includes: stirring for 5-10 min at a rotation speed of 500-700 rpm. The stirring under the condition has the advantages that the biological oil is heated uniformly, if the rotating speed is less than 500rpm, the heat is not uniformly distributed, and if the rotating speed is too high, a large amount of air is involved to cause foam generation;
the biological oil comprises at least one of rubber oil, coal tar, fuel oil, lubricating oil, vegetable oil, naphthenic oil, furfural extract oil and deasphalted oil.
The activated rubber powder is obtained by activating waste rubber powder; the method for activating the waste rubber powder comprises the following steps:
soaking waste rubber powder in a sodium hypochlorite solution, and uniformly stirring to obtain activated rubber powder, wherein the sodium hypochlorite solution is prepared from sodium chlorate and deionized water (0.8-1.2): 1 proportion. The ratio is preferably 1: 1.
the temperature of the reaction kettle is set to be 80-100 ℃ for the following reasons: if the reaction temperature is lower than 80 ℃, the fusion effect of the regenerant is not facilitated; if the reaction temperature is higher than 100 ℃, the adverse effect of coking exists;
step S2, adding 15-25 parts by weight of activated rubber powder and 10-15 parts by weight of polyphosphoric acid into the treated bio-oil for second stirring to obtain a mixture;
in the technical proposal, the device comprises a base,
the second stirring includes: shearing at 3000-5000 rpm for 30-60 min. Stirring under the condition to ensure that the polyphosphoric acid is uniformly distributed in the biological oil;
and step S3, sequentially adding 3-5 parts by weight of ultraviolet absorbent and 1-5 parts by weight of plasticizer into the mixture, carrying out third stirring, and then cooling to room temperature to obtain the environment-friendly asphalt biorenewable agent.
In the technical proposal, the device comprises a base,
the ultraviolet absorbent comprises at least one of tert-butyl salicylate, phenyl salicylate and 2-hydroxy-4-methoxybenzophenone.
The plasticizer comprises at least one of dioctyl phthalate, dibutyl maleate, trioctyl trimellitate and citrate.
The third stirring includes: shearing at 1000-2000 rpm for 10-20 min. So that the materials are uniformly distributed;
according to the invention, the waste rubber powder and polyphosphoric acid are compounded and activated through the bio-oil components, and then the additive is added to synthesize the environment-friendly biological regenerant, after the environment-friendly biological regenerant is added to aged asphalt, the bio-oil which is used as the asphalt regenerant and achieves the purpose of recovering the performance of the aged asphalt has better anti-aging performance, 50-70 parts by weight of bio-oil are added to supplement the oil component of the asphalt lost due to aging, so that the aged asphalt colloid structure is adjusted, the low-temperature performance, fatigue performance and construction workability of the aged asphalt are obviously improved, and meanwhile, the bio-oil and the rubber powder can soften the rubber powder and swell a sulfur bridge structure under the action of the bio-oil, so that the blending of the rubber powder and the asphalt is promoted; and further compounding 10-15 parts by weight of polyphosphoric acid and 15-25 parts by weight of activated rubber powder, so that the track resistance, fatigue resistance and low-temperature crack resistance of the regenerated asphalt are improved, and the superposition effect of the performance improvement effect on the regenerated asphalt road is realized.
The invention comprises the following raw materials in parts by weight: 50-70 parts of bio-oil, 15-25 parts of activated rubber powder, 10-15 parts of polyphosphoric acid, 3-5 parts of ultraviolet absorbent and 1-5 parts of plasticizer; the proportion ensures that each component generates the best synergistic effect. If the adding part of the biological oil is less than 50 parts, the regeneration effect is not obvious; if the content is more than 70 parts, the high temperature of the regenerated asphalt is adversely affected; if the adding amount of the activated rubber powder is less than 15 parts, the performance of the regenerated asphalt pavement can not be improved; if the content of the activated rubber powder is more than 25 parts, the contact development of the activated rubber powder and the asphalt is not facilitated; if the adding amount of the polyphosphoric acid is less than 10 parts, the effect is not obvious; if the content is more than 15 parts, the low-temperature performance of the regenerated asphalt is adversely affected;
the ultraviolet absorbent can obviously improve the anti-aging capability of the asphalt, and has no obvious effect if the addition amount is less than 3 parts; if the content is more than 5 parts, the effect is not obvious; the plasticizer can improve the low-temperature crack resistance of the asphalt, and the effect is not obvious when the adding amount is less than 1 part; if the content is more than 5 parts, the high-temperature performance of the regenerated asphalt is adversely affected;
according to another exemplary embodiment of the present invention, there is provided an environment-friendly asphalt biorenewable agent obtained by the method.
According to another exemplary embodiment of the present invention, there is provided a reclaimed asphalt, which is prepared by using a raw material comprising: 10-20 parts of environment-friendly asphalt biological regenerant and 100 parts of recycled waste SBS asphalt.
As a specific implementation mode, 100 parts by weight of recovered waste SBS asphalt is heated in an oven to 150-170 ℃, transferred to an oil bath pan, added with 5-10 parts by weight of cosolvent, stirred by adopting an oil bath heating mode through common stirring equipment at 500-700 rpm for 30min and kept at the constant temperature for 1 h; then adding 10-20 parts by weight of a regenerant, and mixing at 170-180 ℃ by using a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 2000-5000 r/min, and the shearing time is 60-90 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
The cosolvent is one or more of washing oil, anthracene oil, coumarone, heavy aromatics, etc.
The following will describe an environmental-friendly asphalt bioremediation agent and a preparation method thereof in detail with reference to examples, comparative examples and experimental data.
Example 1
(1) A: preheating a reaction kettle, heating to 80 ℃, adding 50 parts by weight of rubber oil into the reaction kettle, and stirring for 5min under the condition that the rotating speed is 500 rpm; b: compounding 15 parts by weight of activated rubber powder and 10 parts by weight of polyphosphoric acid according to a proper proportion, adding the compounded mixture into biological oil, and shearing the mixture at a high speed of 3000rpm for 30 min; c: and sequentially adding 5 parts by weight of tert-butyl salicylate and 1 part by weight of dioctyl phthalate into the mixture, stirring for 10min, and gradually cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
(2) Heating 100 parts by weight of recovered waste SBS asphalt in an oven to 150 ℃, transferring to an oil bath pan, adding 5 parts by weight of wash oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 500rpm, and keeping the temperature for 1 h; then adding 10 parts by weight of regenerant, and mixing at the temperature of 170 ℃ by adopting a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 2000r/min, and the shearing time is 60 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Example 2
(1) A: preheating a reaction kettle, heating to 90 ℃, adding 60 parts by weight of fuel oil into the reaction kettle, and stirring for 8min under the condition that the rotating speed is 600 rpm; b: compounding 20 parts by weight of activated rubber powder and 13 parts by weight of polyphosphoric acid according to a proper proportion, adding the compounded mixture into biological oil, and shearing the mixture at a high speed of 3200rpm for 40 min; c: and sequentially adding 3 parts by weight of phenyl salicylate and 2 parts by weight of dibutyl phthalate into the mixture, stirring for 15min, and gradually cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
(2) Heating 100 parts by weight of recovered waste SBS pitch in an oven to 160 ℃, transferring to an oil bath pan, adding 6 parts by weight of anthracene oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 600rpm, and keeping the temperature for 1 h; then adding 15 parts by weight of regenerant, and mixing at 175 ℃ by adopting a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 3000r/min, and the shearing time is 70 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Example 3
(1) A: preheating a reaction kettle, heating to 100 ℃, adding 70 parts by weight of deasphalted oil into the reaction kettle, and stirring for 10min at the rotation speed of 700 rpm; b: compounding 25 parts by weight of activated rubber powder and 15 parts by weight of polyphosphoric acid according to a proper proportion, adding the compounded mixture into biological oil, and shearing the mixture at a high speed of 3500rpm for 50 min; c: and sequentially adding 3 parts by weight of 2-hydroxy-4-methoxybenzophenone and 3 parts by weight of triethyl citrate into the mixture, stirring for 20min, and gradually cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
(2) Heating 100 parts by weight of recovered waste SBS pitch in an oven to 170 ℃, transferring to an oil bath pan, adding 8 parts by weight of wash oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 700rpm, and keeping the temperature for 1 h; then adding 20 parts by weight of regenerant, and mixing at the temperature of 180 ℃ by adopting a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 3000r/min, and the shearing time is 70 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Example 4
(1) A: preheating a reaction kettle, heating to 85 ℃, adding 60 parts by weight of rubber oil into the reaction kettle, and stirring for 8min at the rotation speed of 600 rpm; b: compounding 15 parts by weight of activated rubber powder and 10 parts by weight of polyphosphoric acid according to a proper proportion, adding the compounded mixture into biological oil, and shearing the mixture at a high speed of 3000rpm for 60 min; c: and sequentially adding 3 parts by weight of 2-hydroxy-4-methoxybenzophenone and 4 parts by weight of trioctyl trimellitate into the mixture, stirring for 10min, and gradually cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
(2) Heating 100 parts by weight of recovered waste SBS pitch in a drying oven to 150 ℃, transferring to an oil bath pan, adding 9 parts by weight of anthracene oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 600rpm, and keeping the temperature for 1 h; then adding 15 parts by weight of regenerant, and mixing at the temperature of 170 ℃ by adopting a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 5000r/min, and the shearing time is 90 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Example 5
(1) A: preheating a reaction kettle, heating to 95 ℃, adding 70 parts by weight of rubber oil into the reaction kettle, and stirring for 10min at the rotation speed of 700 rpm; b: compounding 20 parts by weight of activated rubber powder and 15 parts by weight of polyphosphoric acid according to a proper proportion, adding the compounded mixture into biological oil, and shearing the mixture at a high speed of 3500rpm for 50 min; c: and sequentially adding 4 parts by weight of tert-butyl salicylate and 5 parts by weight of trioctyl trimellitate into the mixture, stirring for 15min, and gradually cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
(2) Heating 100 parts by weight of recovered waste SBS asphalt in an oven to 160 ℃, transferring to an oil bath pan, adding 10 parts by weight of wash oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 700rpm, and keeping the temperature for 1 h; then adding 20 parts by weight of regenerant, and mixing at the temperature of 180 ℃ by adopting a high-speed shearing instrument to uniformly disperse the regenerant in the asphalt, wherein the shearing rate is 3000r/min, and the shearing time is 80 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Comparative example 1
The difference from example 1 is the use of waste SBS asphalt without added rejuvenating agent.
Heating 100 parts by weight of recovered waste SBS asphalt in an oven to 150 ℃, transferring to an oil bath pan, adding 5 parts by weight of wash oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 500rpm, and keeping the temperature for 1 h; mixing at 170 deg.C with a high speed shearing apparatus, wherein the shearing rate is 2000r/min, and the shearing time is 60 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Comparative example 2
The difference from example 1 is the use of the original SBS asphalt.
Heating 100 parts by weight of recovered waste SBS asphalt in an oven to 150 ℃, transferring to an oil bath pan, adding 5 parts by weight of wash oil, stirring for 30min by adopting an oil bath heating mode through common stirring equipment at 500rpm, and keeping the temperature for 1 h; mixing at 170 deg.C with a high speed shearing apparatus, wherein the shearing rate is 2000r/min, and the shearing time is 60 min; and finally, putting the sheared modified asphalt into a 135 ℃ oven for swelling development for 1h to obtain the regenerated asphalt.
Experimental example 1
For comparison, the above examples and comparative examples are summarized in table 1.
TABLE 1
The test results of the above examples and comparative examples are shown in table 2:
TABLE 2
As shown in Table 2, through experimental comparison, each technical index of the regenerated asphalt is basically close to that of the matrix asphalt and is even better after the regenerant is added, and the biological oil/activated rubber powder/polyphosphoric acid system can improve the low-temperature performance, the anti-fatigue and anti-rutting performance and the self-healing performance of the aged asphalt and also obviously improve the self-healing performance of the aged asphalt, which indicates that the asphalt regenerant in the embodiment has good regenerability.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The preparation method of the environment-friendly asphalt biological regenerant is characterized by comprising the following steps of:
preheating a reaction kettle to 80-100 ℃, adding 50-70 parts by weight of bio-oil into the reaction kettle, and carrying out first stirring to obtain treated bio-oil;
adding 15-25 parts by weight of activated rubber powder and 10-15 parts by weight of polyphosphoric acid into the treated bio-oil for second stirring to obtain a mixture;
and sequentially adding 3-5 parts by weight of ultraviolet absorbent and 1-5 parts by weight of plasticizer into the mixture for third stirring, and then cooling to room temperature to obtain the environment-friendly asphalt biological regenerant.
2. The method for preparing the environment-friendly asphalt biorenewant according to claim 1, wherein the bio-oil comprises at least one of rubber oil, coal tar, fuel oil, lubricating oil, vegetable oil, naphthenic oil, furfural extract oil and deasphalted oil.
3. The preparation method of the environment-friendly asphalt biorenewant according to claim 1, wherein the activated rubber powder is obtained by activating waste rubber powder; the method for activating the waste rubber powder comprises the following steps:
soaking waste rubber powder in a sodium hypochlorite solution, and uniformly stirring to obtain activated rubber powder, wherein the sodium hypochlorite solution is prepared from sodium chlorate and deionized water (0.8-1.2): 1 proportion.
4. The method as claimed in claim 1, wherein the ultraviolet absorbent comprises at least one of tert-butyl salicylate, phenyl salicylate and 2-hydroxy-4-methoxybenzophenone.
5. The method for preparing the environment-friendly asphalt biorenewant according to claim 1, wherein the plasticizer comprises at least one of dioctyl phthalate, dibutyl maleate, trioctyl trimellitate and citrate esters.
6. The method for preparing the environment-friendly asphalt biorenewant according to claim 1, wherein the first stirring comprises: stirring for 5-10 min at a rotation speed of 500-700 rpm.
7. The method for preparing the environment-friendly asphalt biorenewant according to claim 1, wherein the second stirring comprises: shearing at 3000-5000 rpm for 30-60 min.
8. The method for preparing the environment-friendly asphalt biorenewant according to claim 1, wherein the third stirring comprises: shearing at 1000-2000 rpm for 10-20 min.
9. An environment-friendly asphalt biorenewant prepared according to the method of any one of claims 1-8.
10. The reclaimed asphalt is characterized in that the preparation raw materials of the reclaimed asphalt comprise: 10-20 parts by weight of the environment-friendly asphalt biorenewant of claim 9 and 100 parts by weight of recycled waste SBS asphalt.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110015313A1 (en) * | 2009-06-19 | 2011-01-20 | Jean-Valery Martin | Reclaimed asphalt pavement containing polyphosphoric acid modified binder |
| CN112358223A (en) * | 2020-10-19 | 2021-02-12 | 武汉轻工大学 | Warm-mixing agent, recycling agent and preparation method of warm-mixing recycled asphalt mixture |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110015313A1 (en) * | 2009-06-19 | 2011-01-20 | Jean-Valery Martin | Reclaimed asphalt pavement containing polyphosphoric acid modified binder |
| CN112358223A (en) * | 2020-10-19 | 2021-02-12 | 武汉轻工大学 | Warm-mixing agent, recycling agent and preparation method of warm-mixing recycled asphalt mixture |
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