CN113773658A - SBS modified asphalt regenerant and preparation method thereof - Google Patents
SBS modified asphalt regenerant and preparation method thereof Download PDFInfo
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- CN113773658A CN113773658A CN202111094573.1A CN202111094573A CN113773658A CN 113773658 A CN113773658 A CN 113773658A CN 202111094573 A CN202111094573 A CN 202111094573A CN 113773658 A CN113773658 A CN 113773658A
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- 239000012492 regenerant Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 239000004014 plasticizer Substances 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 29
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 239000003607 modifier Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 18
- 238000010008 shearing Methods 0.000 claims description 17
- 238000004064 recycling Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 239000003208 petroleum Substances 0.000 claims description 5
- 230000008439 repair process Effects 0.000 claims description 5
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- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
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- 239000002699 waste material Substances 0.000 abstract description 4
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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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
- C08L57/00—Compositions of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C08L57/02—Copolymers of mineral oil hydrocarbons
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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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses an SBS modified asphalt regenerant and a preparation method thereof, wherein the SBS modified asphalt regenerant consists of extract oil, a plasticizer, an SBS modifier, an SBS structure repairing agent and tackifying resin, and the raw materials comprise the following components in percentage by mass: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin. The chemical composition and the colloid structure of the reducible aged asphalt with high aromatic content in the extract oil can recover the physical properties; the SBS structure repairing agent can restore the SBS molecular structure of the aged asphalt and increase the molecular weight, so that the low-temperature ductility of the asphalt is restored; the plasticizer can increase the flexibility of the aged asphalt, thereby reducing the high-temperature viscosity of the aged asphalt; in addition, the invention also reduces the cost of the regenerated modified asphalt and avoids the waste of resources.
Description
Technical Field
The invention belongs to the technical field of regeneration of waste asphalt in road engineering, and particularly relates to a regeneration technology of SBS modified asphalt.
Background
At present, more than 90% of the roads in the expressway in China are asphalt roads. The asphalt pavement is easy to age under the comprehensive actions of heat, oxygen, light, water and the like during service. With the rapid development of economy, the road performance of the asphalt pavement is seriously deteriorated due to rutting, cracking and other diseases of the asphalt pavement caused by the rapid increase of traffic volume, the continuous increase of axle load, the change of weather conditions and other factors, and the asphalt pavement in China enters a large-scale maintenance period.
In recent years, SBS modified asphalt with excellent road performance is increasingly applied to the paving process of high-grade road surfaces. Although SBS can significantly improve the high and low temperature properties of asphalt. However, as the service life of asphalt pavements increases, SBS modified asphalt pavements also face aging problems. In the aging process of SBS modified asphalt, SBS molecules degrade to cause the network structure to be damaged, and the pavement performance of the modified asphalt is seriously reduced, so that after a certain service life, the pavement needs to be repaired or re-paved to recover the pavement performance. Thereby generating a large amount of waste SBS modified asphalt mixture. If the old asphalt mixture is discarded, not only is the resource waste caused, but also great pressure is brought to the ecological environment. In view of environmental protection, energy conservation and emission reduction, the asphalt pavement regeneration is an effective technical means.
The regeneration of aged asphalt in the asphalt pavement regeneration technology is the key. Under natural conditions, the occurrence of asphalt aging reaction is irreversible, and the common measure is that artificial addition of a regenerant reacts with aged asphalt to improve the pavement performance of the asphalt, however, at present, the regeneration of SBS modified asphalt is mostly realized by adding a common regenerant, and test results show that the common regenerant can better recover the softening point and the penetration degree of SBS modified asphalt, but the recovery effect on ductility is limited, and a satisfactory regeneration effect is not achieved. The common asphalt regenerant only supplements and adjusts the components of the asphalt regenerant, but cannot recover the damaged cross-linked network structure, so that the performance recovery effect of the regenerated SBS modified asphalt is poor, and the use requirement of high-grade asphalt pavement is difficult to meet.
In order to recover the structure of aged SBS, patent CN 108715686A discloses a SBS modified asphalt regenerant which consists of topping slurry, deasphalted oil, vacuum residue, olefin metathesis catalyst, antioxidant and anti-aging agent, wherein the regenerant adopts SBS reaction containing olefin metathesis catalyst and chain scission to recover the SBS molecular structure again, thereby effectively improving the performance of regenerated SBS modified asphalt, and the regenerant can better improve the high and low temperature performance of aged SBS modified asphalt. Although the amount of the added catalyst is 1% -5% of that of the SBS modifier, the catalyst is a Bragg catalyst which is very expensive, and although the structure of the SBS can be recovered, the regeneration cost is far higher than the production cost of the SBS.
Based on the above description, there is a need for a SBS modified asphalt recycling agent and a preparation method thereof, which can recover the properties of aged asphalt and SBS cross-linked network structure, and has low manufacturing cost, so that recycled SBS modified asphalt has excellent road properties.
Disclosure of Invention
The invention aims to provide an SBS modified asphalt regenerant and a preparation method thereof, and aims to solve the problems that a common asphalt regenerant only supplements and adjusts components of the asphalt regenerant, cannot recover a damaged cross-linked network structure, has poor performance recovery effect of regenerated SBS modified asphalt, and has high regeneration cost.
In order to solve the technical problems, the specific technical scheme of the SBS modified asphalt regenerant and the preparation method thereof is as follows:
the SBS modified asphalt regenerant consists of extract oil, a plasticizer, an SBS modifier, an SBS structure repairing agent and tackifying resin, wherein the raw materials comprise the following components in percentage by mass: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin.
Further, the aromatic hydrocarbon component content in the extract oil is more than 65 wt%.
Further, the SBS modifier is linear SBS.
Further, the plasticizer is an o-benzene plasticizer.
Further, the SBS structure repair agent is 1, 6-hexanediol diglycidyl ether.
Further, the tackifying resin is a C9 petroleum resin.
A preparation method of SBS modified asphalt regenerant comprises the following steps:
s1, weighing the extract oil, the plasticizer, the SBS modifier, the SBS structure repair agent and the tackifying resin according to the mass percentage of the raw materials for later use, wherein the mass percentage of the raw materials is as follows: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin;
s2, heating the extracted oil to 130-150 ℃;
s3, adding a plasticizer and tackifying resin into the extract oil, stirring at the rotating speed of 100-200 rpm for 10-20 min, keeping the temperature at 130-150 ℃, adding an SBS modifier, and keeping the temperature at 130-150 ℃ for 30-60 min;
s4, shearing for 30-60 min under a high-speed shearing machine, wherein the shearing rate is 2000-5000 rpm, and the temperature is kept at 160-180 ℃;
and S5, adding the SBS structure repairing agent, keeping the temperature at 130-150 ℃, and stirring at the rotating speed of 300-800 rpm for 20-50 min to obtain the SBS modified asphalt regenerating agent.
The SBS modified asphalt regenerant and the preparation method thereof have the following advantages that:
1. during the mixing and paving processes of the SBS modified asphalt mixture, the light components of the asphalt volatilize under the action of heat, so that the saturated component content is obviously reduced, and during the use process of the SBS modified asphalt pavement, the chemical components in the asphalt are gradually converted into colloid and asphaltene from aromatic components under the action of heat, oxygen and ultraviolet rays, so that the chemical composition and the colloid structure of the asphalt are changed, and the performance of the asphalt is deteriorated.
2. In the processes of mixing, paving and using the SBS modified asphalt mixture, under the action of heat or ultraviolet light, carbon-carbon double bonds in SBS molecular chains can be broken to generate degradation reaction to form free radicals, the free radicals are combined with oxygen molecules to form peroxide free radicals, and the SBS molecular weight is gradually reduced along with the continuous proceeding of the free radical reaction, so that the low-temperature ductility of the modified asphalt is obviously reduced.
3. The invention utilizes the softening effect of the plasticizer on the asphalt to increase the flexibility of the aged asphalt, thereby reducing the high-temperature viscosity of the aged SBS modified asphalt.
4. The price of various raw materials is moderate, so that the cost of the regenerated modified asphalt is greatly reduced.
Drawings
FIG. 1 is a flow chart of the preparation method of the SBS modified asphalt regenerant of the invention.
Detailed Description
In order to better understand the objects, technical solutions and functions of the present invention, the SBS modified asphalt recycling agent and the preparation method thereof according to the present invention will be described in further detail with reference to the following examples.
The invention relates to an SBS modified asphalt regenerant, which consists of extract oil, a plasticizer, an SBS modifier, an SBS structure repairing agent and tackifying resin. Wherein the mass percentage of each raw material is as follows: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin.
The extract oil is oil obtained by removing the solvent from the extract liquid refined by the petroleum fraction solvent, and the extract oil has high aromatic hydrocarbon content, and the high aromatic hydrocarbon content can reduce the chemical composition and the colloid structure of the aged asphalt so as to recover the physical properties of the aged asphalt. Preferably, the extract oil comprised by the present invention has an aromatic content of more than 65 wt%.
The SBS modifier is a styrene-butadiene-styrene block copolymer, can increase the strength, elasticity and cohesive force of asphalt, improve various performances of asphalt concrete such as high and low temperature, improve the driving condition of roads and prolong the service life of roads. The SBS modifier contained in the invention is linear SBS.
The plasticizer can improve the performance of a high polymer material, has a softening effect on asphalt, and increases the flexibility of aged asphalt, so that the high-temperature viscosity of the aged SBS modified asphalt is reduced. Preferably, the plasticizer comprised in the present invention is an o-benzene type plasticizer.
The SBS structure repairing agent is 1, 6-hexanediol diglycidyl ether, and epoxy groups at two ends of the SBS structure repairing agent can respectively react with oxygen-containing functional groups (such as carboxyl) formed by degrading and oxidizing SBS, so that the SBS molecular structure is recovered, the molecular weight is increased, and the low-temperature ductility of the modified asphalt is recovered.
The tackifying resin is produced by chemical raw materials, preferably, the tackifying resin contained in the invention is C9 petroleum resin, and the C9 petroleum resin is C9 fraction decomposed from naphtha and comprises indene, vinyl toluene, styrene, methyl styrene, DCPD and other components.
The invention relates to a preparation method of an SBS modified asphalt regenerant, which comprises the following steps:
s1, weighing the extract oil, the plasticizer, the SBS modifier, the SBS structure repairing agent and the tackifying resin according to the mass percentage of the raw materials for later use, wherein the mass percentage of the raw materials is as follows: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin;
s2, heating the extracted oil to 130-150 ℃;
s3, adding a plasticizer and tackifying resin into the extract oil, stirring at the rotating speed of 100-200 rpm for 10-20 min, keeping the temperature at 130-150 ℃, adding an SBS modifier, and keeping the temperature at 130-150 ℃ for 30-60 min;
s4, shearing for 30-60 min under a high-speed shearing machine, wherein the shearing rate is 2000-5000 rpm, and the temperature is kept at 160-180 ℃;
and S5, adding the SBS structure repairing agent, keeping the temperature at 130-150 ℃, and stirring at the rotating speed of 300-800 rpm for 20-50 min to obtain the SBS modified asphalt regenerating agent.
In order to evaluate the improvement effect of the SBS modified asphalt regenerant on the performance of the aged SBS modified asphalt, the invention simulates the aging of the SBS modified asphalt in the long-term use process of a road surface by a rotating film oven (RTFOT) delaying for 300 minutes to obtain the aged SBS modified asphalt.
The preparation method of the aged SBS modified asphalt comprises the following steps:
the unaged SBS-modified bitumen had a softening point of 70 ℃, an extensibility of 23.5cm at 5 ℃, a penetration of 51.9dmm at 25 ℃ and a viscosity of 2440 mPa.s at 135 ℃ and was aged in a rotating film oven (RTFOT) at 163 ℃ for 300 minutes. The aged SBS modified asphalt has a softening point of 75.3 ℃, an extensibility of 0.4cm at 5 ℃, a penetration of 22.8dmm at 25 ℃ and a viscosity of 3670 pas at 135 ℃.
The following examples further illustrate the technical solutions of the present invention, but should not be construed as limiting the scope of the present invention. In the embodiment, the aged SBS modified asphalt is used as a test raw material, and the SBS modified asphalt regenerant is prepared according to the preparation method of the SBS modified asphalt regenerant.
Example 1:
weighing 45 parts by mass of extract oil heated to 140 ℃, adding 16 parts by mass of plasticizer and 2 parts by mass of tackifying resin, stirring and mixing for 15 minutes at 140 ℃ +/-10 ℃ and 200rpm, then adding 13 parts by mass of SBS modifier, preserving heat for 30 minutes, moving to a shearing machine, shearing for 30 minutes at 3500rpm at the temperature of 170 ℃, adding 24 parts by mass of SBS structure repairing agent, and continuously stirring for 20 minutes at 300rpm to obtain the SBS modified asphalt recycling agent.
Weighing 90 parts by mass of aged SBS modified asphalt heated to 150 ℃, adding 10 parts by mass of the SBS modified asphalt regenerant, keeping the temperature at 150 ℃, and stirring at the rotating speed of 300rpm for 20 minutes to obtain the regenerated SBS modified asphalt.
The recycled SBS modified asphalt is subjected to performance test, and has a softening point of 61.6 ℃, an extensibility of 22.8cm at 5 ℃, a penetration of 59.3dmm at 25 ℃ and a viscosity of 1870mPa & s at 135 ℃. The regenerant can reduce the chemical composition of asphalt, recover the molecular structure of SBS and have excellent penetrating performance. The regenerant can better recover the performance of the aged SBS modified asphalt.
Example 2:
weighing 45 parts by mass of extract oil heated to 140 ℃, adding 16 parts by mass of plasticizer and 2 parts by mass of tackifying resin, stirring and mixing for 15 minutes at 140 ℃ +/-10 ℃ and at the rotating speed of 200rpm, then adding 13 parts by mass of SBS modifier, preserving heat for 30 minutes, moving to a shearing machine, shearing for 30 minutes at the temperature of 170 ℃, keeping 3500rpm, and continuing stirring for 20 minutes at the rotating speed of 300rpm to obtain the asphalt recycling agent.
Weighing 90 parts by mass of aged SBS modified asphalt heated to 150 ℃, adding 10 parts by mass of the asphalt regenerant, keeping the temperature at 150 ℃, and stirring at the rotating speed of 300rpm for 20 minutes to obtain the regenerated SBS modified asphalt.
The recycled SBS modified asphalt is subjected to performance test, the softening point is 57.4 ℃, the ductility at 5 ℃ is 10.1cm, the penetration at 25 ℃ is 46.3dmm, and the viscosity at 135 ℃ is 1510mPa & s.
Compared with the example 1, the regenerant in the example 2 is not added with the SBS structure repairing agent, and the regenerated SBS modified asphalt prepared by using the regenerant in the example 2 has low penetration and 5 ℃ ductility, so that the SBS structure repairing agent can catalyze the broken chain SBS molecular structure in the aged asphalt to repair and has good recovery effect on the aged SBS modified asphalt.
Example 3:
weighing 45 parts by mass of extract oil heated to 140 ℃, adding 16 parts by mass of plasticizer and 2 parts by mass of tackifying resin, stirring and mixing for 15 minutes at 140 ℃ +/-10 ℃ and 200rpm, then adding 10 parts by mass of SBS modifier, preserving heat for 30 minutes, moving to a shearing machine, shearing for 30 minutes at 3500rpm at the temperature of 170 ℃, adding 27 parts by mass of SBS structure repairing agent, and continuously stirring for 20 minutes at 300rpm to obtain the SBS modified asphalt recycling agent.
Weighing 90 parts by mass of aged SBS modified asphalt heated to 150 ℃, adding 10 parts by mass of the SBS modified asphalt regenerant, keeping the temperature at 150 ℃, and stirring at the rotating speed of 300rpm for 20 minutes to obtain the regenerated SBS modified asphalt.
The recycled SBS modified asphalt is subjected to performance test, the softening point is 59.1 ℃, the ductility at 5 ℃ is 28.5cm, the penetration at 25 ℃ is 63.8dmm, and the viscosity at 135 ℃ is 1680mPa & s.
Compared with the embodiment 1, the ductility at 5 ℃ and the penetration at 25 ℃ of the regenerated SBS modified asphalt are further improved along with the increase of the mixing amount of the SBS structure repairing agent in the regenerating agent.
Example 4:
weighing 45 parts by mass of extract oil heated to 140 ℃, adding 16 parts by mass of plasticizer and 2 parts by mass of tackifying resin, stirring and mixing for 15 minutes at 140 ℃ +/-10 ℃ and 200rpm, then adding 13 parts by mass of SBS modifier, preserving heat for 30 minutes, moving to a shearing machine, shearing for 30 minutes at 3500rpm at the temperature of 170 ℃, adding 24 parts by mass of SBS structure repairing agent, and continuously stirring for 20 minutes at 300rpm to obtain the SBS modified asphalt recycling agent.
Weighing 84 parts by mass of aged SBS modified asphalt heated to 150 ℃, adding 16 parts by mass of SBS modified asphalt regenerant, keeping the temperature at 150 ℃, and stirring at the rotating speed of 300rpm for 20 minutes to obtain the regenerated SBS modified asphalt.
The recycled SBS modified asphalt is subjected to performance test, the softening point is 54.9 ℃, the ductility at 5 ℃ is 34.8cm, the penetration at 25 ℃ is 101dmm, and the viscosity at 135 ℃ is 1570mPa & s.
Compared with the example 1, the ductility at 5 ℃ of the regenerated SBS modified asphalt is greatly improved along with the increase of the using amount of the regenerant. The ductility performance of the aged SBS modified asphalt can be greatly recovered by the regenerant.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. The SBS modified asphalt regenerant is characterized by comprising extract oil, a plasticizer, an SBS modifier, an SBS structure repairing agent and tackifying resin, wherein the raw materials comprise the following components in percentage by mass: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin.
2. The SBS modified asphalt recycling agent according to claim 1, wherein the aromatic hydrocarbon component content of the extract oil is greater than 65 wt%.
3. The SBS modified asphalt recycling agent of claim 1, wherein the SBS modifier is linear SBS.
4. The SBS modified asphalt recycling agent of claim 1, wherein the plasticizer is an o-benzene plasticizer.
5. The SBS modified asphalt recycling agent of claim 1, wherein the SBS structure repair agent is 1, 6-hexanediol diglycidyl ether.
6. The SBS modified asphalt recycling agent of claim 1, wherein the tackifying resin is C9 petroleum resin.
7. The preparation method of the SBS modified asphalt regenerant is characterized by comprising the following steps of:
s1, weighing the extract oil, the plasticizer, the SBS modifier, the SBS structure repair agent and the tackifying resin according to the mass percentage of the raw materials for later use, wherein the mass percentage of the raw materials is as follows: 20-50% of extract oil, 5-25% of plasticizer, 1-15% of SBS modifier, 5-25% of SBS structure repairing agent and 1-10% of tackifying resin;
s2, heating the extracted oil to 130-150 ℃;
s3, adding a plasticizer and tackifying resin into the extract oil, stirring at the rotating speed of 100-200 rpm for 10-20 min, keeping the temperature at 130-150 ℃, adding an SBS modifier, and keeping the temperature at 130-150 ℃ for 30-60 min;
s4, shearing for 30-60 min under a high-speed shearing machine, wherein the shearing rate is 2000-5000 rpm, and the temperature is kept at 160-180 ℃;
and S5, adding the SBS structure repairing agent, keeping the temperature at 130-150 ℃, and stirring at the rotating speed of 300-800 rpm for 20-50 min to obtain the SBS modified asphalt regenerating agent.
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| CN114656793A (en) * | 2022-02-28 | 2022-06-24 | 甘肃省交通科学研究院集团有限公司 | PPA (polyphthalamide) -based compounded high-toughness SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method thereof |
| CN115029006A (en) * | 2022-06-24 | 2022-09-09 | 南京林业大学 | Asphalt regenerant and preparation method and using method thereof |
| CN115477852A (en) * | 2022-09-14 | 2022-12-16 | 武汉工程大学 | Regenerated SBS (styrene butadiene styrene) modified asphalt material based on polyurethane-glyceryl ether synergistic effect and preparation method thereof |
| CN115637052A (en) * | 2022-08-16 | 2023-01-24 | 招商局重庆交通科研设计院有限公司 | Warm-mixed regenerant for in-situ heat regeneration and preparation method thereof |
| CN116178969A (en) * | 2023-01-10 | 2023-05-30 | 福州大学 | SBS modified asphalt regenerant and preparation method thereof |
| CN116694091A (en) * | 2022-02-24 | 2023-09-05 | 长沙理工大学 | Environment-friendly high-performance asphalt regenerant and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116694091A (en) * | 2022-02-24 | 2023-09-05 | 长沙理工大学 | Environment-friendly high-performance asphalt regenerant and preparation method thereof |
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| CN115637052A (en) * | 2022-08-16 | 2023-01-24 | 招商局重庆交通科研设计院有限公司 | Warm-mixed regenerant for in-situ heat regeneration and preparation method thereof |
| CN115477852A (en) * | 2022-09-14 | 2022-12-16 | 武汉工程大学 | Regenerated SBS (styrene butadiene styrene) modified asphalt material based on polyurethane-glyceryl ether synergistic effect and preparation method thereof |
| CN116178969A (en) * | 2023-01-10 | 2023-05-30 | 福州大学 | SBS modified asphalt regenerant and preparation method thereof |
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Application publication date: 20211210 |