CN108948752B - Special asphalt for permeable pavement, mixture containing same and preparation method - Google Patents
Special asphalt for permeable pavement, mixture containing same and preparation method Download PDFInfo
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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
- 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
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses asphalt special for a permeable pavement, which is prepared from the following raw materials in parts by weight: 80-90 parts of petroleum asphalt, 2.5-4.5 parts of a high-molecular graft copolymer, 0-1 part of modified styrene-butadiene rubber, 2-5 parts of tackifying resin, 6-10 parts of rubber powder, 2-4 parts of rubber oil and 0.1-0.2 part of a stabilizer. The invention also discloses a mixture containing the special asphalt for the permeable pavement and application thereof. The special modified asphalt for the permeable pavement provided by the invention adopts various composite materials, the performances of the various materials are complementary, so that the dynamic viscosity, the adhesion and the toughness of the modified asphalt are greatly improved, and the design requirements of a lower surface layer or a surface layer with small traffic volume and light traffic volume in the permeable pavement are met.
Description
Technical Field
The invention belongs to the field of road engineering, and particularly relates to an asphalt system for a permeable pavement and a mixture containing the modified asphalt system.
Background
In recent years, the proposal of 'sponge cities' enables permeable pavements and large-pore drainage pavements to be widely concerned in China, and the pavements have the functions of draining water and seeping water, can reduce surface runoff of roads, improve the driving safety of roads in rainy days, have the function of noise reduction, and overcome the defects that the traditional hardened pavements lack water permeability and air permeability.
The permeable pavement is also called as porous pavement, and comprises a permeable concrete pavement, an OGFC (open graded anti-skid wearing course) asphalt pavement and the like, and a large number of penetrating pores are arranged inside a coarse aggregate framework. The high pore structure of the water permeable pavement can effectively permeate rainwater underground, and reduce urban earth surface runoff. However, the permeable pavement with the high pore structure can cause rainwater to enter the interior of the pavement structure layer, and aggregate is easy to be corroded by the rainwater to be peeled off, so that the pavement is loose, pits are formed, and the service durability of the pavement is affected, therefore, the permeable pavement is paved by using the high-viscosity modified asphalt material. At present, most of the traditional domestic high-viscosity modified asphalt adopts SBS, SBR, petroleum resin and petroleum asphalt to prepare a high-viscosity modifier by blending, and the preparation process is complex and the cost is relatively high. The high-viscosity modified asphalt widely used in foreign countries is mainly high-viscosity modified asphalt prepared by TPS modifier imported from Japan and Korean SK high-viscosity modified asphalt (national highway science and technology high-layer forum 2004:17-21), and the modified asphalt is expensive and high in cost. Is not favorable for the popularization and the application of the permeable pavement.
Aiming at the requirement of sponge city construction, it is necessary to provide the modified asphalt which has low cost, is suitable for the national conditions of China and is specially applied to the middle and lower surface layers of the permeable pavement, and meets the requirements of the permeable pavement on viscosity, high-temperature stability and the like.
Disclosure of Invention
Aiming at the defects in the field, the invention aims to provide the asphalt special for the permeable pavement and the preparation method thereof.
The invention also aims to provide a mixture containing the special asphalt and a preparation method thereof.
A third object of the invention is to propose the use of said mix.
The technical scheme for realizing the above purpose of the invention is as follows:
the special asphalt for the permeable pavement is prepared from the following raw materials in parts by weight: 80-90 parts of petroleum asphalt, 2.5-4.5 parts of a high-molecular graft copolymer, 0-1 part of modified styrene-butadiene rubber, 2-5 parts of tackifying resin, 6-10 parts of rubber powder, 2-4 parts of rubber oil and 0.1-0.2 part of a stabilizer.
The petroleum asphalt is No. 90 road petroleum asphalt, the high-molecular graft copolymer is obtained by graft copolymerization of a star styrene-butadiene-styrene block copolymer (SBS) and Methyl Methacrylate (MMA) monomer, and the amount of the monomer is 30-40% of the mass of the star styrene-butadiene-styrene block copolymer SBS.
Wherein the modified styrene-butadiene rubber is styrene-butadiene rubber modified by acrylic acid graft copolymerization.
Preferably, the tackifying resin is one or more of a C5 series petroleum resin, a C9 series petroleum resin, a dicyclopentadiene series petroleum resin, a terpene phenol resin and a rosin resin. The petroleum resin has good compatibility with styrene polymers such as SBS, SBR and the like and high molecular polymers, and improves the viscosity and the strength of the asphalt.
Wherein the rubber powder is activated rubber powder with the particle size of 50-80 meshes. The stabilizer is sulfur.
The preparation method of the special asphalt for the permeable pavement comprises the following steps:
the method comprises the following steps: heating petroleum asphalt to 140-170 ℃, adding rubber oil into the asphalt, stirring for 10-30 min, heating to 170-185 ℃, adding the high-molecular graft copolymer and the modified styrene-butadiene rubber while shearing, shearing for 30-50 min, adding rubber powder and tackifying resin at 180-185 ℃, and shearing for 20-30 min to obtain a mixture;
step two: slowly adding a stabilizer into the mixture obtained in the step one at the temperature of 175-180 ℃, shearing for 10-20 min, reducing the temperature to 170-180 ℃, and stirring and developing for 3-4 h.
The grading of aggregate in the mixture is the water permeability grading designed for the special water permeable pavement in sponge city, and is one of PAC-20, PAC-16, PAC-13 and PAC-10, and the weight parts of the added materials are as follows: 100 parts of aggregate, 4.6-6 parts of the special asphalt for the permeable pavement and 0-0.1 part of modified fiber.
Wherein the modified fiber is one or two of modified polyacrylonitrile fiber, modified polyvinyl alcohol fiber, modified polyester fiber and modified viscose fiber.
A preparation method of a special asphalt mixture for a permeable pavement comprises the following steps:
1) preheating aggregate of the designed grading of the permeable pavement special for the sponge city for 4-5 hours at 190-210 ℃, adding the aggregate into a mixing pot heated to 180-185 ℃, and uniformly mixing;
2) adding special asphalt for the permeable pavement into the aggregate, and stirring for 90-180 s;
3) adding modified fibers into the mixed material, and mixing for 90-180 s;
4) adding mineral powder into the mixed mixture, continuously mixing for 90-180 s, and uniformly mixing until no agglomeration and no white material are generated;
5) compacting and molding at 165-170 ℃.
The market-available high-viscosity asphalt is noisy in variety, most of the high-viscosity asphalt is obtained by directly adding modifier particles into a mixture by a dry method, and like the preparation method of high viscosity by a wet method (namely, firstly preparing modified asphalt and then preparing a mixture), the product index is rarely controllable.
The application of the special mixture for the permeable pavement is specifically applied to the middle and lower surface layers of the special permeable pavement for the sponge city or the surface layers with small traffic volume and light traffic volume.
The invention has the beneficial effects that:
aiming at the requirement of sponge city construction, the invention provides a modified asphalt material specially applied to a permeable pavement and a preparation method of a mixture thereof. The asphalt material is characterized in that tackifying resin, high-molecular graft copolymer and modified styrene butadiene rubber are added simultaneously, so that the dynamic viscosity, the adhesion and the toughness of the modified asphalt are greatly improved, the asphalt material has good high and low temperature performance, can meet the pavement of a lower surface layer in water permeable pavement, and is relatively low in cost. In addition, in the manufacturing process of the mixture, the modified fiber is particularly added, so that the effects of bridging and reinforcing are achieved, and the dynamic stability and the anti-stripping performance of the mixture are improved.
(1) The special modified asphalt for the permeable pavement provided by the invention adopts various composite materials, and the performances of the various materials are complementary, so that the dynamic viscosity, the adhesion and the toughness of the modified asphalt are greatly improved, and the design requirements of the middle and lower surface layers of the permeable pavement are met.
(2) The preparation process is simple and the cost is relatively low.
(3) In the manufacturing process of the mixture, the modified fiber is added, so that the functions of bridging and reinforcing are well played, and the performance index of the mixture is improved.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the embodiment, the polymer graft copolymer is obtained by graft copolymerization of star-shaped styrene-butadiene-styrene block copolymer (SBS) and Methyl Methacrylate (MMA) monomers, wherein the amount of the monomers is 30-40% of the mass of the star-shaped styrene-butadiene-styrene block copolymer SBS. The modified styrene-butadiene rubber is acrylic acid graft copolymerization modified styrene-butadiene rubber.
Example 1:
the special modified asphalt for the permeable pavement is prepared from the following raw materials in parts by weight: 80 parts of No. 90 road petroleum asphalt, 4.5 parts of high-molecular graft copolymer, 0 part of modified styrene-butadiene rubber, 2 parts of tackifying resin (C5 series petroleum resin), 10 parts of rubber powder (activated rubber powder with the particle size of 50-80 meshes), 3.5 parts of rubber oil and 0.18 part of sulfur stabilizer.
A preparation method of special modified asphalt for permeable pavements comprises the following steps:
the method comprises the following steps: heating 80 parts of No. 90 road petroleum asphalt to 145 ℃, adding 3.5 parts of rubber oil into the asphalt, stirring for 15min, heating to 175 ℃, adding 4.5 parts of high-molecular graft copolymer while shearing, shearing for 40min, adding 10 parts of rubber powder and 2 parts of tackifying resin at 180 ℃, and shearing for 20min to obtain a mixture;
step two: slowly adding 0.18 part of sulfur stabilizer into the mixture obtained in the step one at 175 ℃, shearing for 15min, reducing the temperature to 175 ℃, and stirring and developing for 3 h.
Example 2
The special modified asphalt for the permeable pavement is prepared from the following raw materials in parts by weight: 84 parts of No. 90 road petroleum asphalt, 4.5 parts of high-molecular graft copolymer, 0 part of modified styrene-butadiene rubber, 5 parts of tackifying resin C9 series petroleum resin, 50-80 meshes of 8 parts of activated rubber powder, 3.5 parts of rubber oil and 0.18 part of sulfur stabilizer.
A preparation method of special modified asphalt for permeable pavements comprises the following steps:
the method comprises the following steps: heating 84 parts of No. 90 road petroleum asphalt to 150 ℃, adding 3.5 parts of rubber oil into the asphalt, stirring for 20min, heating to 180 ℃, adding 4.5 parts of high-molecular graft copolymer and 0 part of modified styrene-butadiene rubber while shearing, shearing for 30min, adding 8 parts of activated rubber powder of 50-80 meshes and 5 parts of tackifying resin C9 series petroleum resin at 180 ℃, and shearing for 25min to obtain a mixture;
step two: slowly adding 0.18 part of sulfur stabilizer into the mixture obtained in the step one at 175 ℃, shearing for 20min, reducing the temperature to 175 ℃, and stirring and developing for 3 h.
Example 3
The special modified asphalt for the permeable pavement is prepared from the following raw materials in parts by weight: 84 parts of No. 90 road petroleum asphalt, 3.5 parts of high-molecular graft copolymer, 1 part of modified styrene-butadiene rubber, 3 parts of tackifying resin C5 series petroleum resin, 50-80 meshes of 8 parts of activated rubber powder, 3.5 parts of rubber oil and 0.15 part of sulfur stabilizer.
A preparation method of special modified asphalt for permeable pavements comprises the following steps:
the method comprises the following steps: heating 84 parts of No. 90 road petroleum asphalt to 160 ℃, adding 3.5 parts of rubber oil into the asphalt, stirring for 25min, heating to 185 ℃, adding 3.5 parts of high-molecular graft copolymer and 1 part of modified styrene-butadiene rubber while shearing, shearing for 40min, adding 8 parts of activated rubber powder of 50-80 meshes and 3 parts of tackifying resin C5 series petroleum resin at 185 ℃, and shearing for 30min to obtain a mixture;
step two: slowly adding 0.15 part of sulfur stabilizer into the mixture obtained in the step one at the temperature of 180 ℃, shearing for 20min, reducing the temperature to 175 ℃, and stirring and developing for 4 h.
The special modified asphalt for permeable pavements obtained in examples 1-3 was subjected to a conventional performance test, and the test results are shown in table 1.
Table 1 examples 1-3 modified asphalt test results
The unmodified matrix asphalt is generally brittle at low temperature, has low softening point and cannot meet the use requirements of expressways and high-grade highways due to high and low temperature performance. Compared with the related performance which can be measured by No. 90 matrix asphalt, the performance of the special modified asphalt for water permeation is greatly improved.
Example 4
The grading of the aggregate is water-permeable grading PAC-16 designed on the lower layer of the special water-permeable pavement for the sponge city, the weight parts of the added materials are 100 parts of the aggregate, 5 parts of the special asphalt for the lower layer of the water-permeable pavement in example 3 and 0.5 part of modified fiber (modified polyacrylonitrile fiber), and the grading of the aggregate in the mixture is water-permeable grading PAC-20 designed on the lower layer of the special water-permeable pavement for the sponge city.
A preparation method of a special asphalt mixture for a permeable pavement comprises the following steps:
1) preheating aggregate of the design grading of the special permeable pavement for the sponge city for 4.5 hours at the temperature of 200 ℃, adding the fine aggregate and the coarse aggregate into a mixing pot heated to 180 ℃, and uniformly mixing;
2) adding special asphalt for the permeable pavement into the aggregate, and stirring for 90 s;
3) adding modified fibers into the mixed material, and mixing for 90 s;
4) adding mineral powder into the mixed material, continuously mixing for 90s, uniformly mixing, and avoiding agglomeration and white material;
5) compacting and molding at 165 ℃.
The special modified asphalt mixture for the upper layer in the permeable pavement obtained in example 4 was subjected to conventional marshall performance, water stability, high-temperature stability and low-temperature cracking performance tests. Wherein, the high temperature stability is reflected by the rutting dynamic stability index, and the low temperature cracking performance is reflected by the test of the bending failure strain of the trabecula under the low temperature condition. The test results are shown in Table 2.
The detection index definition and the detection process are executed according to the technical specification JTGF40-2004 of the construction of the asphalt pavement of the highway (published by Beijing people's traffic publisher in 2004) of the industry standard of the ministry of transportation;
the detection method is executed according to road engineering asphalt and asphalt mixture test regulation JTG E20-2011 (published by Beijing people traffic publishing Co., 2008).
Table 2 example 4 test results
| Item | Unit of | Example 4 | Test method |
| Gross bulk relative density (volume method) | - | 2.082 | - |
| Theoretical maximum relative density | - | 2.611 | - |
| Void fraction | ％ | 20.3 | T 0705-2011 |
| Degree of stability | KN | 5.89 | T 0709-2011 |
| Marshall residual stability | ％ | 121.7 | T 0709-2011 |
| Residual strength of freeze-thaw cleavage test | ％ | 77.1 | T 0729-2011 |
| Schrenberg asphalt leakage loss | ％ | 1.375 | T 0732-2011 |
| Kentucky scatter loss | ％ | 12.93 | T 0733-2011 |
| Loss of splash in flooded kentuckers | ％ | 13.5 | T 0733-2011 |
| Low temperature bending failure strain | (με) | 2814 | T 0715-2011 |
| Rut for vehicle | Sub/mm | 10681 | T 0719-2011 |
| Water penetration test | ml/min | 4520 | T 0730-2011 |
In the process of preparing the mixture, the modified fiber is added, so that the functions of bridging and reinforcing are well played, and the index of the mixture is improved
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. It will be apparent to those skilled in the art that variations, substitutions or modifications of the prior art, which may be directly derived or inferred from the disclosure and general knowledge of the patent, may be made to achieve the functions and effects described in the patent, and all equivalent changes or modifications of the features, which are within the scope of protection of the present patent.
Claims (8)
1. The special asphalt for the permeable pavement is characterized by being prepared from the following raw materials in parts by weight: 80-90 parts of petroleum asphalt, 2.5-4.5 parts of a high-molecular graft copolymer, 1 part of modified styrene-butadiene rubber, 2-5 parts of tackifying resin, 6-10 parts of rubber powder, 2-4 parts of rubber oil and 0.1-0.2 part of a stabilizer; the petroleum asphalt is No. 90 road petroleum asphalt, the high-molecular graft copolymer is obtained by graft copolymerization of a star-shaped styrene-butadiene-styrene block copolymer and a methyl methacrylate monomer, the amount of the monomer is 30-40% of the mass of the star-shaped styrene-butadiene-styrene block copolymer SBS, and the modified styrene-butadiene rubber is acrylic acid graft copolymerization modified styrene-butadiene rubber.
2. The asphalt as claimed in claim 1, wherein the tackifying resin is one or more of a C5 petroleum resin, a C9 petroleum resin, a dicyclopentadiene petroleum resin, a terpene phenol resin and a rosin resin.
3. The asphalt special for the permeable pavement according to claim 1, wherein the rubber powder is activated rubber powder with a particle size of 50-80 meshes; the stabilizer is sulfur.
4. The preparation method of the asphalt special for the permeable pavement as claimed in any one of claims 1 to 3, characterized by comprising the following steps:
the method comprises the following steps: heating petroleum asphalt to 140-170 ℃, adding rubber oil into the asphalt, stirring for 10-30 min, heating to 170-185 ℃, adding the high-molecular graft copolymer and the modified styrene-butadiene rubber while shearing, shearing for 30-50 min, adding rubber powder and tackifying resin at 180-185 ℃, and shearing for 20-30 min to obtain a mixture;
step two: slowly adding a stabilizer into the mixture obtained in the step one at the temperature of 175-180 ℃, shearing for 10-20 min, reducing the temperature to 170-180 ℃, and stirring and developing for 3-4 h.
5. The special asphalt mixture for the permeable pavement is characterized in that aggregate grading in the mixture is one of permeable grading PAC-20, PAC-16, PAC-13 and PAC-10 designed for the permeable pavement special for the sponge city, and the added materials are in parts by weight as follows: 100 parts of aggregate, 4.6-6 parts of asphalt special for permeable pavements according to any one of claims 1-3, and 0-0.1 part of modified fiber.
6. The asphalt mixture special for permeable pavements according to claim 5, wherein the modified fiber is one or two of modified polyacrylonitrile fiber, modified polyvinyl alcohol fiber, modified polyester fiber and modified viscose fiber.
7. The preparation method of the special asphalt mixture for the permeable pavement is characterized by comprising the following steps of:
1) preheating aggregate of the designed grading of the permeable pavement special for the sponge city for 4-5 hours at 190-210 ℃, adding the aggregate into a mixing pot heated to 180-185 ℃, and uniformly mixing;
2) adding the asphalt special for the permeable pavement according to any one of claims 1 to 3 into aggregate, and stirring for 90 to 180 seconds;
3) adding modified fibers into the mixed material, and mixing for 90-180 s;
4) adding mineral powder into the mixed mixture, continuously mixing for 90-180 s, and uniformly mixing until no agglomeration and no white material are generated;
5) compacting and molding at 165-170 ℃.
8. The application of the special permeable pavement mixture of claim 5 or 6, which is characterized in that the mixture is applied to the middle and lower surface layers of the special permeable pavement for sponge cities or the surface layers with small traffic volume and light traffic volume.
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| CN109796777A (en) * | 2018-12-14 | 2019-05-24 | 苏州三品交通建设工程有限公司 | Sponge urban water-through road surface pitch and preparation method thereof |
| CN111621136A (en) * | 2019-06-18 | 2020-09-04 | 道一高分子聚合物(宁波)有限公司 | Runway and construction process thereof |
| CN113603398B (en) * | 2021-08-18 | 2022-06-03 | 鄂尔多斯市路泰公路工程有限责任公司 | Anti-icing and noise-reducing asphalt mixture and preparation method thereof |
| CN113955977B (en) * | 2021-11-05 | 2022-08-16 | 禹智环保科技（深圳）有限公司 | Water-permeable colored rubber pavement material and preparation method thereof |
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