CN113336478B - SBS latex modified asphalt mixture and warm-mixing direct-casting preparation process thereof - Google Patents
SBS latex modified asphalt mixture and warm-mixing direct-casting preparation process thereof Download PDFInfo
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- CN113336478B CN113336478B CN202110720350.5A CN202110720350A CN113336478B CN 113336478 B CN113336478 B CN 113336478B CN 202110720350 A CN202110720350 A CN 202110720350A CN 113336478 B CN113336478 B CN 113336478B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to the technical field of modified asphalt mixtures, in particular to an SBS latex modified asphalt mixture and a warm-mixing direct-vat-set preparation process thereof, wherein the mixture comprises the following components in percentage by mass: 93-96% of primary aggregate, 3-7% of matrix asphalt, 0.3-1.2% of SBS latex and 0.03-0.12% of cross-linking agent; the cross-linking agent is formed by mixing elemental sulfur, a super vulcanization accelerator and organic peroxide, and the process comprises the following steps: firstly, aggregate is heated to a certain temperature, and is put into a stirring cylinder, then the mixed solution of SBS latex and cross linker is sprayed into the stirring cylinder under the action of special conveying equipment while matrix asphalt is added, and the mixture is discharged after being fully stirred. The SBS latex is directly put into a mixing tank to prepare the SBS modified asphalt mixture from the common matrix asphalt mixture or the warm-mix (hot-mix) recycled asphalt mixture, so that the problems of aging, high pollution, gelation, insufficient crosslinking, storage segregation, high-temperature heat preservation and the like of the modified asphalt are solved.
Description
Technical Field
The invention relates to the technical field of modified asphalt, in particular to an SBS latex modified asphalt mixture and a warm-mixing direct-vat-set preparation process thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Most of the pollution of organic nitrogen oxides and asphalt smoke of the asphalt pavement of the highway is in the construction forecourt, namely the pavement paving construction site. Pollutants such as dust, asphalt smoke and the like in a rear field (a mixing plant for producing hot asphalt mixture) are provided with corresponding disposal devices, but the pollutants cannot be disposed in the front field until now and can only be released in air.
For example, although the SBS dry direct-vat-set modification process disclosed in the prior art solves the problem of mixing and modification, and avoids aging of SBS, the SBS particles are ground into extremely fine powder, which causes high price of SBS powder and does not reduce the cost of modified asphalt mixture; meanwhile, the mixing temperature and the discharging temperature are the same as those of the traditional SBS modified asphalt mixture production process, the energy-saving and emission-reduction effects are not obvious, in order to ensure the complete dissolution of SBS powder, the stirring time is also prolonged, and the use efficiency of equipment is reduced; if the SBS and the matrix asphalt are mixed and ground, and a special cross-linking agent is added, the stability of the SBS modified asphalt is improved, and the process is substantially not different from the traditional modified asphalt mixture production.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide an SBS latex modified asphalt mixture and a warm-mixing direct-casting preparation process thereof. According to the invention, the SBS latex is directly put into a mixing tank to prepare the SBS modified asphalt mixture from the common matrix asphalt mixture or the regenerated asphalt mixture RAP, so that the road performance of the SBS modified asphalt mixture can reach the technical standards of JTG F40-2017 and GTB25033-2010, and the two-in-one process of preparing the modified asphalt and the modified asphalt mixture is directly realized; solves the problems of aging, high pollution, gelation, insufficient crosslinking, storage segregation, high-temperature heat preservation and the like of the modified asphalt.
The production of the warm-mix modified asphalt mixture is realized under the warm-mix condition, the generation source of asphalt smoke is thoroughly eliminated, according to actual measurement and calculation, one ton of modified asphalt mixture is produced, 9 kilograms of carbon dioxide is discharged per ton, the emission reduction rate is up to more than 38 percent compared with the modified asphalt mixture produced by the traditional process, and the problems of high production cost, long production period, high transportation, use and storage requirements, limited performance of SBS modified asphalt mixture and the like caused by the traditional process method are solved.
In order to achieve the above object, the technical solution of the present invention is as follows:
in a first aspect of the invention, an SBS latex modified asphalt mixture is provided, which comprises the following components by mass percent: 93-96% of aggregate, 3-7% of matrix asphalt, 0.3-1.2% of SBS latex and 0.03-0.12% of cross-linking agent;
the cross-linking agent is formed by mixing elemental sulfur, a super vulcanization accelerator and organic peroxide.
In a second aspect of the invention, a process for preparing a modified asphalt mixture by warm-mixing and direct-batch mixing SBS latex is provided, which comprises the following steps:
firstly, heating aggregate to a certain temperature, putting the aggregate into a stirring cylinder, then adding matrix asphalt, simultaneously spraying the mixed solution of SBS latex and a cross-linking agent under the action of high-pressure air, stirring and then discharging.
The specific embodiment of the invention has the following beneficial effects:
warm mixing is realized: due to the active agent in the latex, the temperature can be greatly reduced when the mixture is mixed, and the mixture has the compaction characteristic that the temperature at 125 ℃ is the same as that at 160 ℃ of the traditional modified asphalt mixture;
high dispersibility is achieved: the SBS latex can be rapidly and uniformly mixed with the matrix asphalt within 30-40 seconds, the SBS fineness reaches about 0.1 micron through measurement of a laser particle sizer, the SBS latex is uniformly distributed, the SBS efficiency is greatly improved, and the SBS using amount is effectively reduced;
the smoke suppression is realized: after the SBS is rapidly and uniformly dispersed in the asphalt, the aromatic components in the asphalt are adsorbed and swelled, so that the aromatic components are prevented from drifting into the air. As the adsorption ratio of SBS to aromatic components is 12-18 times, when the ratio of SBS to asphalt is up to 3%, the aromatic components in asphalt are basically adsorbed by SBS and can not overflow, so that the generation of asphalt smoke is avoided.
Low-temperature crosslinking is realized: as the super accelerator and the peroxide are matched in the invention, SBS can realize SBS crosslinking at the temperature of about 90 ℃.
High crosslinking rate is realized: the addition amount of the cross-linking agent can be in the range of 0.03-0.12% (based on the weight of the mixture), the cross-linking rate of SBS is greatly improved, and no gel is generated.
Breaking through the limitation of SBS addition amount: the SBS latex is directly put into the mixing tank, so that the content limitation of SBS in asphalt is removed, the segregation and swelling do not need to be worried about, and aromatic hydrocarbon does not need to be added to assist the dissolution; with the help of the activator, SBS and the base asphalt are stably absorbed and fused to form a uniform mixture, and the cross linker connects the mixture into a net-shaped whole.
Modifying the warm-mixing and hot-mixing recycled asphalt mixture with high recycling rate: when the addition amount of Reclaimed Asphalt (RAP) of the asphalt mixture exceeds more than 40 percent, SBS can not permeate into RAP asphalt and can not realize modification if the modified asphalt mixture is prepared, and the process solves the problem of modification production of high-proportion recycled mixtures.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In one embodiment of the present invention, an SBS latex modified asphalt mixture is provided, which comprises the following components by mass: 93-96% of aggregate, 3-7% of matrix asphalt, 0.3-1.2% of SBS latex and 0.03-0.12% of cross-linking agent;
the cross-linking agent is formed by mixing elemental sulfur, a super vulcanization accelerator and organic peroxide.
In one or more embodiments, the cross-linking agent comprises, in mass percent: 40-70% of elemental sulfur, 10-30% of super vulcanization accelerator and 25-45% of organic peroxide;
preferably, the super vulcanization accelerator is one or more of thiuram accelerators and one or more of zinc dicarbamates;
in one or more embodiments, the crosslinker is added in an amount of 0.03 to 0.12%; the addition amount of the cross-linking agent sulfur of the traditional SBS modified asphalt is strictly limited; the addition amount is only 0.005-0.015 percent, SBS is not fully crosslinked, and SBS gel is caused by excessive addition, so that the traditional modified asphalt can only be partially crosslinked, and the modification efficiency of SBS can not be fully exerted; the addition amount of the cross-linking agent can be in the range of 0.03-0.12%, the cross-linking rate of SBS is greatly improved, and no gel is generated.
In one or more embodiments, the SBS latex is a cationic or nonionic latex having a solid content of 45 to 50%, a molecular weight of 7 to 30 tens of thousands, a star-shaped structure or a linear structure, and a block ratio of 3 to 4;
the SBS latex used in the invention is cationic or nonionic latex produced by a dissolving distillation process method; the preparation process of SBS latex includes two kinds: one is a living emulsion polymerization method (abbreviated as emulsion polymerization method), and the other is a solvent dissolving emulsification distillation method (abbreviated as dissolving distillation method).
The SBS latex prepared by the emulsion polymerization method can not realize crosslinking, so that the modification effect of SBS on the matrix asphalt can not be reflected, for example, the SBS latex produced by Shanxi junior and the SBS latex developed by professor Longwu in Zhejiang university, the SBS in the latex produced by the process presents individual spheroids, the spheroids are not linked with each other, and the performance of the asphalt can not be improved, so that the latex produced by the process can not be directly used for preparing modified asphalt mixture in a cylinder; the SBS latex produced by the dissolving distillation method maintains the physical form of the original SBS latex, and SBS molecules are crosslinked into a net structure under the action of a crosslinking agent, so that the performance of the asphalt mixture can be greatly improved.
The invention realizes one-stop production of the warm-mix modified asphalt mixture by using special SBS latex and cross-linking agent matching materials. Due to the active agent in the latex, the temperature can be greatly reduced when the mixture is mixed, the compaction characteristic of 125 ℃ which is the same as that of 160 ℃ of the traditional modified asphalt mixture is achieved, and the purpose of warm mixing is achieved;
in the invention, the SBS latex has smoke suppression effect; the aromatic components in the asphalt are mainly generated at high temperature, and the SBS can be dissolved in the aromatic components, so that the aromatic components in the asphalt are adsorbed and swelled after the SBS is rapidly and uniformly dispersed in the asphalt, and the aromatic components are prevented from flowing into the air; as the adsorption ratio of SBS to aromatic components is 12-18 times, when the ratio of SBS to the base asphalt reaches above 3%, the aromatic components in the asphalt are basically adsorbed by SBS and can not overflow, thus avoiding the generation of asphalt smoke. The traditional SBS modified asphalt uses sulfur as a cross-linking agent, and the cross-linking temperature is generally above 175 ℃, so that the traditional SBS modified asphalt does not have a low-temperature cross-linking condition. Because the super accelerator and the peroxide are matched in the invention, the low-temperature crosslinking can be realized, so that the SBS can realize the SBS crosslinking at the temperature of about 90 ℃.
The SBS latex used in the invention breaks through the limitation of the addition amount of SBS, SBS with large molecular weight and star structure, such as swallow 4303 and Yuexi Dai II, the molecular weight of SBS is 24-30 ten thousand, when SBS is used for preparing high-viscosity high-elasticity modified asphalt, the addition amount of SBS is greatly limited, and is difficult to break through 7%, and a large amount of aromatic hydrocarbon is added to assist dissolution, even if SBS still cannot be stable, regular stirring is kept, so that SBS is prevented from separating out from the asphalt.
The SBS latex is directly put into the mixing tank, so that the content limitation of SBS in asphalt is removed, the segregation and swelling do not need to be worried about, and aromatic hydrocarbon does not need to be added to assist the dissolution; with the help of the cross-linking agent in the embodiment of the invention, SBS and the base asphalt are stably adsorbed and fused to form a uniform mixture, and the cross-linking agent connects the homogeneous mixture into a whole network.
In one or more embodiments, the SBS latex modified asphalt mixture may also be added to a hot-mix or warm-mix recycled asphalt mixture;
the invention provides a technology for preparing a modified asphalt mixture by directly mixing SBS latex in a warm environment, which comprises the following steps:
firstly, aggregate is heated to a certain temperature, and is put into a stirring cylinder, then the mixed solution of SBS latex and cross linker is sprayed into the stirring cylinder under the action of special conveying equipment while matrix asphalt is added, and the mixture is discharged after being stirred.
In one or more embodiments, the aggregate is heated to a temperature of 135 ℃ to 180 ℃;
in one or more embodiments, the base asphalt is added at a temperature of 135 to 170 ℃;
in one or more embodiments, the stirring time is 30 to 40 seconds; the SBS latex contains about 50 percent of water, is rapidly foamed and gasified on the surface of a material sprayed at the temperature of more than 130 ℃, expands hundreds of times in volume, can be rapidly and uniformly mixed with the matrix asphalt within 30-40 seconds under the strong stirring of a stirring cylinder stirrer, and has the SBS fineness of about 0.1 micron, uniform distribution and high dispersibility through the measurement of a laser particle size analyzer, thereby greatly improving the efficacy of SBS and effectively reducing the consumption of SBS. The technology of the invention ensures that the prepared SBS modified asphalt mixture has the characteristics of a warm-mix asphalt mixture under the condition of not prolonging the mixing time.
In one or more embodiments, the mixed solution of SBS latex and crosslinking agent is fed using a pneumatic feeder;
in one or more embodiments, the crosslinking agent may also be added to the base asphalt in a ratio, stirred to homogeneity, and the SBS latex sprayed in.
In one or more embodiments, the SBS latex may also be added to a hot-mix or warm-mix recycled asphalt mix;
preferably, before the reclaimed asphalt RAP is used, the reclaimed asphalt RAP is classified into three grades, namely coarse grade, medium grade and fine grade; and then respectively carrying out extraction tests on the graded reclaimed asphalt RAP to obtain the real aggregate attribute of the reclaimed asphalt RAP, and then determining the production mix proportion of the reclaimed asphalt mixture.
Preferably, in the technology for preparing the modified asphalt mixture by directly mixing the SBS latex with the rubber latex in a warm state, the reclaimed asphalt material RAP is heated to the required temperature and put into a mixing cylinder; and heating the primary aggregate to the required temperature, putting the heated primary aggregate into a stirring cylinder, sequentially adding the matrix asphalt, the regenerant and the SBS latex mixed with the crosslinking agent, stirring for 30-50 seconds, and discharging.
The embodiment of the invention can modify the warm-mixed and hot-mixed recycled asphalt mixture with high recycling rate; when the addition amount of RAP exceeds 40%, SBS in the traditional process method can not be melted into RAP asphalt if the modified asphalt mixture is prepared, so that modification can not be realized; the method in the embodiment of the invention solves the modification problem of the high-proportion recycled mixture.
More preferably, the regenerant may be the regenerant described in patent CN 109232974A.
The invention will be further explained and illustrated with reference to specific examples.
The main equipment comprises: oven, asphalt mixer, electronic scale, stirrer, beaker, glass rod, etc.
The main materials are as follows: 70# heavy-duty asphalt, SBS latex with solid content of 45% (molecular weight is 24-27 ten thousand units, star structure, SB block ratio is 3.
Example 1
Preparation of SBS latex direct-vat modified asphalt mixture AC-13
(1) Adjusting the temperature of a mixing cylinder of the asphalt mixture mixer to 135 ℃; 5000 g of aggregate is heated to 150 ℃ and put into a stirring cylinder. 2 grams of the cross-linking agent was added to 17.5 grams of SBS latex and stirred in a stirrer for 10 minutes for use.
(2) 245 grams of base asphalt was heated to 140 ℃, added to the mixing bowl and stirred for 40 seconds.
(3) And (2) adding the SBS latex obtained in the step (1) into a stirring cylinder, stirring for 180 seconds, and discharging. Forming temperature: 130 ℃.
(4) Adding the mineral powder and stirring for 180 seconds.
And (5) preparing a Marshall test piece, a rut plate and a small beam test piece. The detection results are as follows:
example 2
Preparation of SBS latex direct-vat modified asphalt mixture AC-16
(1) Adjusting the temperature of a mixing cylinder of the asphalt mixture mixer to 135 ℃; 5000 g of aggregate is heated to 150 ℃ and put into a stirring cylinder. 2 grams of the cross-linking agent was added to 22.5 grams of SBS latex and stirred in a stirrer for 10 minutes for use.
(2) 245 grams of machine-made asphalt was heated to 135 ℃ and added to the jar and stirred for 40 seconds.
(3) And (2) adding the SBS latex in the step (1) into a stirring cylinder, and stirring for 180 seconds.
(4) Adding mineral powder, stirring for 180 seconds, discharging, and forming at the temperature: 130 ℃.
And (4) making a Marshall test piece, a rut plate and a small beam test piece. The detection results are as follows:
| test items | Unit of | Detection | Norm of | Description of the invention |
| Marshall stability | KN | 19 | 8 | First class road standard |
| Marshall residue | ％ | 99 | 80 | First class standard |
| Degree of dynamic stability | Order/mm | 6322 | 1000 | First class road standard |
| Splitting strength | MPa | 2.27 | 1 | First class standard |
| Freeze-thaw cleavage | ％ | 98 | 80 | First class road standard |
| Maximum failure strain at low temperature | εμ | 3822 | 2000 | First class standard |
Example 3
Preparation of SBS latex direct-throwing modified asphalt mixture SMA-13
(1) Adjusting the temperature of a mixing cylinder of the asphalt mixture mixer to 150 ℃; 5000 g of aggregate is heated to 150 ℃ and put into a stirring cylinder. 2 grams of the cross-linking agent was added to 26 grams of SBS latex and stirred in a stirrer for 10 minutes for use.
(2) 330 grams of machine-made asphalt was heated to 140 ℃, added to the mixing bowl, and stirred for 40 seconds.
(3) And (2) adding the SBS latex in the step (1) into a stirring cylinder, and stirring for 180 seconds.
(4) Adding the mineral powder and stirring for 180 seconds. Discharging, and forming temperature: 135 ℃ is adopted.
And (4) making a Marshall test piece, a rut plate and a small beam test piece. The detection results are as follows:
example 4
Preparation of SBS latex direct-throwing modified asphalt mixture SMA-16
(1) Adjusting the temperature of a mixing cylinder of the asphalt mixture mixer to 150 ℃; 5000 g of aggregate is heated to 150 ℃ and put into a stirring cylinder.
(2) 3 g of the crosslinking agent was added to 325 g of the base asphalt, stirred and heated to 150 ℃ and then added to a stirring cylinder, and stirred for 40 seconds.
(3) 25 g of SBS latex was added to the jar and stirred for 180 seconds.
(4) Adding the mineral powder and stirring for 180 seconds. And (6) discharging. Forming temperature: at 140 ℃.
And (4) making a Marshall test piece, a rut plate and a small beam test piece. The detection results are as follows:
the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The SBS latex modified asphalt mixture is characterized by comprising the following components in percentage by mass: 93 to 96 percent of primary aggregate, 3 to 7 percent of matrix asphalt, 0.3 to 1.2 percent of SBS latex and 0.03 to 0.12 percent of cross-linking agent, wherein the sum of the using amounts of the components is 100 percent;
the cross-linking agent is formed by mixing elemental sulfur, a super vulcanization accelerator and organic peroxide;
the SBS latex is cationic or nonionic latex produced by a dissolving and distilling process, the solid content is 40-50%, the molecular weight is 7-30 ten thousand, the SBS latex has a star structure or a linear structure, and the block ratio is 3;
SBS latex contains 50% moisture.
2. The SBS latex modified asphalt mixture according to claim 1, wherein the cross-linking agent comprises the following components in percentage by mass: 40 to 70 percent of elemental sulfur, 10 to 30 percent of super vulcanization accelerator, 25 to 45 percent of organic peroxide, and the sum of the usage of the components is 100 percent.
3. The SBS latex modified asphalt mixture of claim 1, wherein the super cure accelerator is selected from one or more of thiuram type accelerators, and one or more of zinc dithiocarbamates.
4. The SBS latex modified asphalt mixture according to claim 1, wherein the SBS latex modified asphalt mixture further comprises a hot mix or warm mix recycled asphalt mixture.
5. A process for preparing a modified asphalt mixture by the warm-mixing and direct-throwing of SBS latex for preparing the SBS latex modified asphalt mixture according to claim 1, which is characterized by comprising the following steps:
firstly, heating aggregate to a certain temperature, putting the aggregate into a stirring cylinder, then adding matrix asphalt, simultaneously spraying the mixed solution of SBS latex and a cross-linking agent under the action of high-pressure air, stirring and then discharging.
6. The process for preparing a modified asphalt mixture according to claim 5, wherein the aggregate is heated at a temperature of 135 ℃ to 180 ℃.
7. The process for preparing a modified asphalt mixture according to claim 5, wherein the temperature of the added matrix asphalt is 135 to 170 ℃.
8. The process for preparing a modified asphalt mixture according to claim 5, further comprising the step of adding RAP.
9. The process for preparing a modified asphalt mixture according to claim 8,
heating RAP to a certain temperature, and putting into a stirring cylinder; and heating the primary aggregate to the required temperature, putting the primary aggregate into a stirring cylinder, adding a mixed solution of a regenerant, matrix asphalt, SBS latex and a crosslinking agent, stirring, and discharging.
10. The process for preparing a modified asphalt mixture according to claim 9, wherein the temperature of the RAP is 135 to 170 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408952A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Warmly-mixed modified emulsified asphalt as well as preparation method and application thereof |
| CN103755225A (en) * | 2013-12-23 | 2014-04-30 | 姚华彦 | Modified bituminous mixture and preparation method thereof |
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2021
- 2021-06-28 CN CN202110720350.5A patent/CN113336478B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408952A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Warmly-mixed modified emulsified asphalt as well as preparation method and application thereof |
| CN103755225A (en) * | 2013-12-23 | 2014-04-30 | 姚华彦 | Modified bituminous mixture and preparation method thereof |
| CN105776958A (en) * | 2016-03-17 | 2016-07-20 | 北京中路铺面技术有限公司 | Method for preparing SBS (styrene butadiene styrene) modified asphalt concrete |
Non-Patent Citations (2)
| Title |
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| Rheological properties, compatibility, and storage stability of SBS latex-modified asphalt;Shisong Ren 等;《Materials》;20191108;第12卷(第22期);第3683页 * |
| SBS胶乳改性乳化沥青制备技术研究;徐传杰 等;《石油炼制与化工》;20101112;第41卷(第11期);第71-75页 * |
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