CN111205660B - Process method for preparing foam SBS modified asphalt and mixture from SBS latex - Google Patents
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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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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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
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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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- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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Abstract
The invention discloses a process method for preparing foam SBS modified asphalt and a mixture by SBS latex, belonging to the technical field of road engineering. The invention relates to a process method for preparing foam SBS modified asphalt, wherein SBS latex is used as a foaming agent and a modifier, and the foam SBS modified asphalt is prepared with hot matrix asphalt through a foaming system containing a colloid mill. The prepared foam SBS modified asphalt is directly mixed with hot aggregate to obtain a foam SBS modified asphalt mixture. The invention directly uses SBS latex as foaming agent and modifier to replace water to foam the base asphalt through a foaming system containing a colloid mill, and prepares foam SBS modified asphalt; the SBS modified asphalt is prepared by using SBS modification without using the matrix asphalt in advance, and meanwhile, the technical problem that the pavement performance of the foam matrix asphalt warm-mix mixture is low or the SBS modified asphalt is difficult to foam is solved; has obvious economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a process method for preparing foam SBS modified asphalt and a mixture by SBS latex.
Background
In order to meet the requirements of modern traffic (large traffic flow, large load) and the like in China, the demand of SBS modified asphalt is obviously increased and exceeds 400 million tons/year at present; however, the traditional SBS modified asphalt has complex production process, large investment on processing equipment and high production cost, and particularly, the SBS modified asphalt needs higher temperature (generally more than or equal to 175 ℃) in the production, storage and transportation processes and the mixing, paving and rolling processes of the SBS modified asphalt mixture, so that the defects of environmental pollution and health influence on constructors caused by high-temperature aging, unstable segregation, high-temperature aging of the SBS modified asphalt mixture, large amount of harmful gas emission and the like are not well solved. Although the direct-vat-set SBS asphalt modifying additive is available in the market at present, the direct-vat-set SBS modifier is solid particles, and is firstly mixed with high-temperature stone (180-195 ℃) and then mixed with hot asphalt (160-185 ℃) in the using process, the mixing time is increased by the two-step mixing method, the spreading and rolling are required to be carried out at high temperature, and the quality of the SBS modified asphalt mixture is difficult to guarantee.
The temperature reduction in the production, construction and other processes of the SBS modified asphalt mixture is a development trend, and the temperature reduction in the production, construction and other processes of the asphalt mixture can be realized by the foamed asphalt mixture warm mixing technology.
However, most of the existing foaming asphalt mixture warm-mixing technologies are to use matrix asphalt to foam to produce a foam matrix asphalt mixture, and the foam matrix asphalt warm-mixing mixture has low road performance and cannot meet the requirements of large flow, large load and the like of modern traffic vehicles.
At present, the SBS modified asphalt is used for preparing the foamed SBS modified asphalt mixture by foaming, but the SBS modified asphalt has strong cohesive force, high temperature required by foaming and large foaming difficulty, so that the warm mixing technology of the foamed SBS modified asphalt mixture is still not popularized in a large quantity.
The process method for developing the expanded SBS modified asphalt can well solve the technical defects has obvious economic and social benefits.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a process method for preparing foam SBS modified asphalt and a mixture by SBS latex.
The technical scheme of the invention is as follows:
a process for preparing the foam SBS modified asphalt from SBS latex features that the SBS latex as foaming agent and modifier and the hot basic asphalt are used to prepare the foam SBS modified asphalt by a foaming system containing colloid mill.
Wherein the SBS latex is commercially available SBS latex (such as SBS latex produced by Hunan Asia rubber) or home-made SBS latex.
In the method, surfactant and water in SBS latex are used as asphalt foaming agent, and tiny SBS particles (less than or equal to 20 um) in SBS latex are used as asphalt modifier, and SBS latex (normal temperature) and hot asphalt are mixed uniformly and instantly by colloid mill type foaming equipment according to a certain proportion, so that the foam SBS modified asphalt is obtained.
As a preferred scheme, the mass of the SBS latex is 3% -15% of that of the matrix asphalt. The higher the SBS latex content in a certain range, the better the performance of the obtained foam SBS modified asphalt.
Preferably, the temperature of the hot base asphalt is 130-170 ℃.
Further, the temperature of the hot matrix asphalt is 130-150 ℃.
As a preferred scheme, the solid content of the SBS latex is 35% -60%.
Preferably, the SBS latex at normal temperature is mixed with hot base asphalt.
A warm mixing process of a foam SBS modified asphalt mixture comprises the following steps:
1) preparing foamed SBS modified asphalt by using SBS latex as a foaming agent and a modifier and hot matrix asphalt through a foaming system containing a colloid mill;
2) mixing the foamed SBS modified asphalt prepared in the step 1) with the aggregate which is heated and premixed to obtain a foamed SBS modified asphalt warm-mixed mixture.
The type of the foamed SBS modified asphalt mixture is not particularly limited, and the foamed SBS modified asphalt mixture is preferably asphalt mixture, asphalt macadam, asphalt mastic gravel and plant-mixed hot recycled asphalt mixture prepared by replacing part of aggregate with old asphalt pavement milling material mentioned in road asphalt pavement design Specification.
As another scheme, the foamed SBS modified asphalt prepared in the step 1) is mixed with the aggregate which is heated and premixed, and then mineral powder is added to be mixed for the second time, so that the foamed SBS modified asphalt warm-mix mixture is obtained.
As a preferred scheme, the mass of the SBS latex is 3% -15% of that of the matrix asphalt. The higher the SBS latex content in a certain range, the better the performance of the obtained foam SBS modified asphalt.
Preferably, in the step 1), the temperature of the hot base asphalt is 130-170 ℃.
Further, in the step 1), the temperature of the hot matrix asphalt is 130-150 ℃.
As a preferable scheme, in the step 1), the solid content of the SBS latex is 35-60%.
Preferably, in step 1), the SBS latex at normal temperature is mixed with hot base asphalt.
As a preferred scheme, the foamed SBS modified asphalt prepared in the step 1) firstly enters a foamed asphalt temporary storage tank and then is pumped into a mixing plant from the temporary storage tank to be mixed with hot aggregate, or the foamed SBS modified asphalt prepared in the step 1) directly enters the mixing plant to be mixed with the hot aggregate, so that a foamed SBS modified asphalt mixture is obtained.
The mixing plant is a hot asphalt mixture mixing plant with various specifications and models sold in the market.
Preferably, the temperature for heating the premixed aggregate in the step 2) is 130 to 200 ℃.
Further, the temperature for heating the premixed aggregate is 130-165 ℃.
Preferably, the aggregate comprises 0% -100% of old asphalt pavement milling material.
Further, the aggregate comprises 0% -90% of old asphalt pavement milling materials. The plant-mixed hot recycled asphalt mixture is prepared by replacing part of aggregates with old asphalt pavement milling materials.
The invention has the beneficial effects that:
1. directly using SBS latex as a foaming agent and a modifier to replace water to foam the matrix asphalt through a foaming system containing a colloid mill to prepare foamed SBS modified asphalt; the SBS modified asphalt is prepared by using SBS modification without using the matrix asphalt in advance, and meanwhile, the technical problem that the pavement performance of the foam matrix asphalt warm-mix mixture is low or the SBS modified asphalt is difficult to foam is solved; the SBS modified asphalt production cost is saved by more than 80%, and the economic benefit and the social benefit are remarkable;
2. the method of the invention is used for producing the foam SBS modified asphalt or the foam SBS modified asphalt mixture, thus saving the investment of SBS modified asphalt production equipment;
3. the temperature of the matrix asphalt in the foaming process is reduced by more than 30 ℃, the high-temperature aging of the SBS modified asphalt in the production, storage and transportation processes is avoided, and the energy is saved;
4. the temperature (above 30 ℃) in the production and construction processes of mixing, spreading, compacting and the like of the foam SBS modified asphalt mixture is reduced, the high-temperature aging of the SBS modified asphalt mixture is avoided, the service life is prolonged by more than 20%, and the foam SBS modified asphalt mixture is energy-saving, green, low-carbon and environment-friendly;
5. the kind and the gradation of the aggregate are not limited, and various foam SBS modified asphalt mixtures can be prepared by the method.
6. The road performance of the foamed SBS modified asphalt mixture obtained by the invention reaches or is superior to that of the traditional hot-mix SBS modified asphalt mixture.
Detailed Description
Preparation of foam SBS modified asphalt
Example 1:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (135 ℃), and is injected into a foaming system containing a colloid mill together with 30 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
Example 2:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (140 ℃), and is injected into a foaming system containing a colloid mill together with 50 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
Example 3:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (135 ℃), and is injected into a foaming system containing a colloid mill together with 80 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
Example 4:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (140 ℃), and is injected into a foaming system containing a colloid mill together with 100 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
Example 5:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (140 ℃), and is injected into a foaming system containing a colloid mill together with 120 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
Example 6:
a process method for preparing foam SBS modified asphalt by SBS latex comprises the following steps:
1000 g of base asphalt is heated to a molten state (140 ℃), and is injected into a foaming system containing a colloid mill together with 150 g of normal-temperature SBS latex with the solid content of 40 percent, a surfactant and water in the SBS latex are used as foaming agents, SBS in the SBS latex is used as a modifier, and the foamed SBS modified asphalt is obtained under the action of the foaming system containing the colloid mill.
In the present embodiment, the "foaming system containing colloid mill" in the above embodiments includes a base asphalt storage tank, an asphalt pump and flow meter, a latex storage tank, a latex pump and flow meter, a colloid mill, a foamed asphalt storage system, related pipelines and valves, a control system, and the like. Wherein, foamed asphalt storage system, namely, foamed asphalt temporary storage tank has heating system, constant voltage control system, agitating unit, import and export and foamed asphalt business turn over metering system.
At the present stage, the indexes of the asphalt foaming effect are generally maximum expansion rate and half-life period(s), the maximum expansion rate refers to the ratio of the maximum volume to the original volume of the asphalt when the asphalt is foamed, and the larger the expansion ratio of the asphalt is, the better the workability of construction is; the half-life is the time required from the moment the asphalt foam reaches the maximum volume to the moment the foam dissipates to half the maximum volume, and the longer the half-life, the lower the asphalt foam decay rate, the longer the effective mixing time that can be provided in the construction. Foamed bitumen generally requires a maximum expansion of greater than 6 times and a half-life of greater than 10 seconds.
The foaming properties of the foamed SBS modified asphalt prepared in examples 1-6 are shown in Table 1.
TABLE 1 foaming Properties of the foamed SBS modified asphalts prepared in examples 1-6
As can be seen from Table 1, the half-life period and the expansion rate of the foamed SBS modified asphalt prepared by the invention are far higher than the general requirements of foamed asphalt.
The index pair formula of the prepared foam SBS modified asphalt, the matrix asphalt and the I-D grade modified asphalt is shown in Table 2.
TABLE 2 comparison of indexes of the foamed SBS modified asphalt prepared according to the present invention with the base asphalt and the I-D modified asphalt
As can be seen from Table 2, the performance of the foam SBS modified asphalt is better and better with the increase of the amount of the SBS latex, and the index requirement of the I-D modified asphalt can be met by directly adding 2% of the SBS latex. Therefore, the amount of the SBS latex direct cast modifier can be adjusted at any time according to the performance requirements of the final foam SBS modified asphalt.
Preparation and performance of foam SBS modified asphalt mixture
Example 7
A warm mixing process of a foam SBS modified asphalt mixture comprises the following steps:
1) mixing the foam SBS modified asphalt prepared in the embodiment 1 with pre-mixed aggregate at 130-165 ℃;
2) adding mineral powder and mixing for the second time to obtain the foam SBS modified asphalt warm-mix mixture. The discharging temperature of the foam SBS modified asphalt warm-mix mixture is 120-150 ℃.
The type of the foamed SBS modified asphalt mixture is not particularly limited, and the foamed SBS modified asphalt mixture is preferably asphalt mixture, asphalt macadam, asphalt mastic gravel and plant-mixed hot recycled asphalt mixture prepared by replacing part of aggregate with old asphalt pavement milling material, which are mentioned in Highway asphalt pavement design Specification.
Taking an AC-13 graded modified asphalt mixture as an example for comparison:
aggregate is 10-15 mm and 5-10 mm basalt and 0-5 mm machine-made sand, the mineral powder is limestone mineral powder, and all indexes of the aggregate meet the requirements of technical Specifications for road asphalt pavement construction (JTG F40-2004).
The mineral aggregate composition is shown in table 3 below. For comparison, the adopted asphalt-to-stone ratio is 4.8, wherein the asphalt-to-stone ratio of the foamed asphalt is calculated according to the pure asphalt consumption calculated by the solid content
TABLE 3 aggregate composite grading
The ordinary I-D grade SBS modified asphalt, the foam SBS modified asphalt prepared in the examples 4 and 5 and the aggregate of the synthetic grade are mixed, compacted and molded. The temperature conditions are shown in Table 4, and the properties of the resulting kneaded material after compacting and molding are shown in Table 5.
TABLE 4 construction temperature comparison table
TABLE 5 comparison of blend Properties
From tables 4 and 5, it can be known that the properties of the SBS latex direct-vat modified foamed asphalt mixture reach or even exceed those of the I-D SBS modified asphalt mixture, and the material heating temperature, the mixing temperature and the like are obviously reduced, so that the energy-saving and consumption-reducing effects are obvious.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. A process method for preparing foam SBS modified asphalt by SBS latex is characterized in that: the foam SBS modified asphalt is prepared from SBS latex and matrix asphalt, wherein the SBS latex is used as a foaming agent and a modifier, and the foam SBS modified asphalt is prepared from the SBS latex and the hot matrix asphalt through a foaming system containing a colloid mill; the mass of the SBS latex is 3% -15% of that of the matrix asphalt; the temperature of the hot matrix asphalt is 130-170 ℃.
2. The process for preparing the foamed SBS modified asphalt from the SBS latex according to claim 1, wherein: the temperature of the hot matrix asphalt is 130-150 ℃.
3. The process for preparing the foamed SBS modified asphalt from the SBS latex according to claim 1, wherein: the solid content of the SBS latex is 35-60%.
4. The process for preparing the foamed SBS modified asphalt from the SBS latex according to claim 1, wherein: the SBS latex at normal temperature is mixed with the hot base asphalt.
5. The warm mixing process of the foam SBS modified asphalt mixture is characterized by comprising the following steps of:
1) the said foam SBS modified asphalt is prepared by the process method of claim 1, SBS latex is used as foaming agent and modifier to prepare foam SBS modified asphalt with hot base asphalt through a foaming system containing colloid mill;
2) mixing the foamed SBS modified asphalt prepared in the step 1) with the aggregate which is heated and premixed to obtain a foamed SBS modified asphalt warm-mixed mixture.
6. The warm mixing process of the foam SBS modified asphalt mixture according to claim 5, wherein the warm mixing process comprises the following steps: the foamed SBS modified asphalt prepared in the step 1) enters a foamed asphalt temporary storage tank, is pumped into a mixing plant from the temporary storage tank and is mixed with hot aggregate, or the foamed SBS modified asphalt prepared in the step 1) directly enters the mixing plant and is mixed with the hot aggregate, so that a foamed SBS modified asphalt mixture is obtained.
7. The warm mixing process of the foam SBS modified asphalt mixture according to claim 5, wherein the warm mixing process comprises the following steps: in the step 2), the temperature for heating the premixed aggregate is 130-200 ℃.
8. The warm mixing process of the foam SBS modified asphalt mixture according to claim 5, wherein the warm mixing process comprises the following steps: the aggregate comprises 0% -100% of old asphalt pavement milling material.
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| EP3992253A1 (en) * | 2020-11-02 | 2022-05-04 | Sasol Wax GmbH | A method to produce a foamed bitumen and a wax dispersion therefor |
| CN113105162B (en) * | 2021-04-06 | 2022-05-06 | 鼎宏荣业建设集团有限公司 | Foamed asphalt warm-mix mixture and preparation method thereof |
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| US20070191514A1 (en) * | 2005-09-12 | 2007-08-16 | Reinke Gerald H | Bituminous paving composition and process for bituminous paving |
| CN102093724A (en) * | 2009-12-09 | 2011-06-15 | 中国石油天然气股份有限公司 | Warm-mixed asphalt additive and preparation method thereof |
| CN106496677A (en) * | 2016-12-13 | 2017-03-15 | 江苏天诺道路材料科技有限公司 | Asphalt foaming agent and preparation method thereof |
| CN106554470A (en) * | 2015-09-30 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of method for preparing the SBS latex for modified emulsifying asphalt or modified pitch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0428767A (en) * | 1990-05-24 | 1992-01-31 | Lion Corp | Asphalt emulsion and asphalt latex emulsion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070191514A1 (en) * | 2005-09-12 | 2007-08-16 | Reinke Gerald H | Bituminous paving composition and process for bituminous paving |
| CN102093724A (en) * | 2009-12-09 | 2011-06-15 | 中国石油天然气股份有限公司 | Warm-mixed asphalt additive and preparation method thereof |
| CN106554470A (en) * | 2015-09-30 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of method for preparing the SBS latex for modified emulsifying asphalt or modified pitch |
| CN106496677A (en) * | 2016-12-13 | 2017-03-15 | 江苏天诺道路材料科技有限公司 | Asphalt foaming agent and preparation method thereof |
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Denomination of invention: A process for preparing foam SBS modified asphalt and mixture from SBS latex Effective date of registration: 20220530 Granted publication date: 20211029 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: ShanDong Dashan Road&Bridge Engineering Co.,Ltd. Registration number: Y2022980006693 |
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