CN114106573A - High-elastic modified asphalt for bridge deck pavement - Google Patents
High-elastic modified asphalt for bridge deck pavement Download PDFInfo
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- CN114106573A CN114106573A CN202111594356.9A CN202111594356A CN114106573A CN 114106573 A CN114106573 A CN 114106573A CN 202111594356 A CN202111594356 A CN 202111594356A CN 114106573 A CN114106573 A CN 114106573A
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- modified asphalt
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- asphalt
- bridge deck
- deck pavement
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- 239000010426 asphalt Substances 0.000 title claims abstract description 125
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims abstract description 31
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 11
- 239000003208 petroleum Substances 0.000 claims abstract description 10
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims description 17
- 238000010008 shearing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003973 paint Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 9
- 239000004568 cement Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 101100202447 Drosophila melanogaster sav gene Proteins 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000001320 hippocampus Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000974 shear rheometry Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
A high-elastic modified asphalt for paving bridge surface. The paint comprises the following components in parts by weight: matrix petroleum asphalt: 84 parts of a styrene-butadiene-styrene block copolymer: 4.2 parts of ethylene-vinyl acetate copolymer: 3 parts of vinyltriethoxysilane: 13 parts. The high-elasticity modified asphalt for bridge deck pavement provided by the invention can be effectively applied to the environment with strong ultraviolet rays, much rainwater and large temperature difference, and the service life of a bridge pavement is prolonged under the condition of greatly improving the elasticity and the anti-cracking capacity of the bridge deck pavement.
Description
Technical Field
The invention relates to high-elastic modified asphalt for bridge deck pavement.
Background
At present, the number of highway bridges in China exceeds 100 million, wherein a bridge deck pavement layer is used as an important component of a bridge travelling system, so that the impact of dynamic load on a bridge deck can be greatly alleviated, and the requirements of stable and comfortable travelling are met. China puts higher requirements on adapting to severe weather, resisting heavy load and heavy traffic in road design, and the improvement of the performance of common asphalt is regarded as one of effective measures. In order to effectively solve the problems existing in the pavement of cement concrete bridge decks, road workers transfer research objects to high-performance polymer modified asphalt. Compared with common asphalt or common modified asphalt, the high-elasticity modified asphalt has higher softening point, high-temperature viscosity and low-temperature ductility, and better high-temperature stability, low-temperature fatigue resistance and elastic recovery capability. The high-elasticity modified asphalt particularly enhances the elastic property, can absorb and disperse tensile stress, can resist plastic deformation and cracking under the action of repeated traffic load, heavy traffic load, temperature load and the like, can also effectively inhibit asphalt stripping caused by water seepage and water infiltration, and greatly improves the resistance of a road surface to damage such as reflection cracks, ruts, pits and the like, thereby prolonging the service life of the road and reducing the maintenance cost. When the high-elasticity modified asphalt is used for paving the bridge deck, the vibration and deflection of the bridge can be remarkably relieved.
Due to the excellent performance of the high-elastic modified asphalt, research institutions and manufacturers usually keep the formula secret, and Guizhou has special geographical climate conditions such as plateau and humidity, so that the high-elastic modified asphalt needs to be developed according to the specific geographical climate conditions for bridge decks in expressways in Guizhou province.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a high elastic modified asphalt for bridge deck pavement, wherein the high elastic modified asphalt concrete has excellent elastic property, excellent anti-rutting property and capability of absorbing and diffusing tensile stress, so as to reduce or avoid the aforementioned problems. The composite material is applied to the pavement performance of a bridge deck pavement layer with strong ultraviolet rays, much rainwater and large temperature difference.
In order to solve the technical problems, the invention provides high-elasticity modified asphalt for bridge deck pavement, which comprises the following components in parts by weight:
matrix petroleum asphalt: 84 parts of a styrene-butadiene-styrene block copolymer: 4.2 parts of ethylene-vinyl acetate copolymer: 3 parts of vinyltriethoxysilane: 13 parts.
Preferably, the high-elasticity modified asphalt for bridge deck pavement further comprises 0.16 part by weight of a stabilizer.
Preferably, the high-elasticity modified asphalt for bridge deck pavement is prepared by the following method,
step A, heating the matrix petroleum asphalt to 170 ℃, adding a styrene-butadiene-styrene block copolymer, an ethylene-vinyl acetate copolymer and vinyl triethoxysilane, and fully stirring and circulating for 30 min;
b, carrying out high-speed shearing for 30min under the conditions that the temperature is 180-195 ℃ and the shearing rate is 4000 r/min;
and step C, after the shearing is stopped, stirring and heating to 180 ℃, and stirring and developing for 1.5 hours at the temperature of 180-190 ℃ to obtain a high-elasticity modified asphalt finished product.
Preferably, in step C, after the shearing is stopped, the addition of 0.16 parts by weight of stabilizer is continued,
the high-elasticity modified asphalt for bridge deck pavement provided by the invention can be effectively applied to the environment with strong ultraviolet rays, much rainwater and large temperature difference, and the service life of a bridge pavement is prolonged under the condition of greatly improving the elasticity and the anti-cracking capacity of the bridge deck pavement.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will be further described.
The invention provides high-elasticity modified asphalt for bridge deck pavement, which comprises the following components in parts by weight:
80-87 parts of matrix petroleum asphalt, such as 70# petroleum asphalt provided by China petrochemical Co., Ltd,
styrene-butadiene-styrene block copolymer: 3.8 to 4.2 portions of styrene-butadiene rubber, for example, the styrene-butadiene rubber powder with the model number of QL-1-2-5-6 provided by the company Limited in the Industrial science of Hippocampus and Fujiu province, or the styrene-butadiene rubber powder with the model number of SH-600 provided by the company Limited in Shenghao Plastic of Dongguan city
Additive: 4.2-4.8 parts of ethylene-vinyl acetate copolymer, such as EVA 230 from DuPont, USA,
tackifier: 2-3 parts of vinyl triethoxysilane, which is used for improving the low-temperature viscosity of the asphalt and simultaneously reducing the high-temperature viscosity of the asphalt.
Stabilizer (optional): 0.14-0.16 portion, and the addition of the stabilizer can bring certain influence on the viscoelasticity and the storage stability of the asphalt. Particularly, when long-distance transportation is required, the stabilizer is added, so that the performance stability of the high-elasticity modified asphalt is not greatly influenced in the long-distance transportation process.
The stabilizer can be the stabilizer provided by Chinese patent CN112300586A 'an SBS modified asphalt stabilizer and SBS modified asphalt', or the stabilizer provided by CN107556764A 'an SBS modified asphalt stabilizer and preparation method and application thereof' or CN105733283A 'an SBS modified asphalt stabilizer'.
The applicant, as a key asphalt product production enterprise in Guizhou province, obtains the formula of the high-elasticity modified asphalt in a laboratory, produces the high-elasticity modified asphalt for a pavement experimental section, and transports the produced high-elasticity modified asphalt to a six-coil water and copper-core pavement experimental section with hundreds of kilometers away for trial. Specifically, the high-elasticity modified asphalt produced by the applicant for bridge deck pavement comprises the following components in parts by weight:
84 parts of matrix petroleum asphalt, 4.2 parts of styrene-butadiene-styrene block copolymer, 3 parts of ethylene-vinyl acetate copolymer, 13 parts of vinyl triethoxysilane and 0.16 part of stabilizer.
The specific preparation process of the high-elastic modified asphalt for bridge deck pavement comprises the following steps:
step A, heating the substrate asphalt to 170 ℃, adding a styrene-butadiene-styrene block copolymer, an ethylene-vinyl acetate copolymer and vinyl triethoxysilane, and fully stirring and circulating for 30 min;
b, carrying out high-speed shearing for 30min under the conditions that the temperature is 180-195 ℃ and the shearing rate is 4000 r/min;
and C, after the shearing is stopped, continuously adding the stabilizer, stirring and heating to 180 ℃, and stirring and developing for 1.5 hours at the temperature of 180-190 ℃ to obtain a high-elasticity modified asphalt finished product. Finally, the vehicle can be loaded and sent to the construction site of the highway.
To further illustrate the technical benefits of the high-elasticity modified asphalt provided by the present application for bridge deck pavement, the conventional SBS modified asphalt is used as a comparative example, and all the characteristic parameters are compared.
In particular, the present invention relates to a method for producing,
the application provides a high-elastic modified asphalt for bridge deck pavement, which comprises the following components in parts by weight: 84 parts of matrix petroleum asphalt, 4.2 parts of styrene-butadiene-styrene block copolymer, 3 parts of ethylene-vinyl acetate copolymer, 13 parts of vinyl triethoxysilane and 0.16 part of stabilizer.
The SBS modified asphalt used as the comparative example comprises the following components in parts by weight: 94 parts of matrix petroleum asphalt, 4.5 parts of styrene-butadiene-styrene block copolymer, 1 part of ethylene-vinyl acetate copolymer and 0.18 part of stabilizer.
Softening point:
the softening point of the asphalt reflects the temperature sensitivity of the asphalt. The higher the softening point of the asphalt, the better its stability, i.e., the better its thermal stability. According to the standard rule (the same below), the high-elasticity modified asphalt and the SBS modified asphalt are respectively tested, and the test results are as follows:
TABLE 1 softening points of high-elasticity modified asphalt and SBS modified asphalt
From the above table, the softening point of the high-elasticity modified asphalt is slightly lower than that of SBS modified asphalt, but it is also demonstrated that the high-elasticity modified asphalt for bridge deck pavement can effectively meet the environmental use requirements in most areas of Guizhou.
Penetration degree:
the indexes for evaluating and representing the temperature sensitivity of the asphalt binder are more, the conventional index for representing the consistency of the asphalt is mainly the penetration degree, and the specific test results are as follows:
TABLE 2 penetration of high-elasticity modified asphalt and SBS modified asphalt
From the above table, the penetration index of the high-elastic modified asphalt is excellent and higher than that of the SBS modified asphalt, and the detection indexes show that the high-elastic modified asphalt for bridge deck pavement can effectively meet the environmental use requirements of most areas in Guizhou province.
Ductility:
the greater the ductility, the better the plasticity of the asphalt, which can reflect the resistance of the asphalt to plastic deformation at lower temperatures, with the following specific test results:
TABLE 3 ductility of high-elastic modified asphalt and SBS modified asphalt
TABLE 4 aging ductility of high-elastic modified asphalt and SBS modified asphalt
As can be seen from tables 3 and 4, the ductility of the high-elasticity modified asphalt, both as-is and after aging, is higher than that of SBS modified asphalt, especially the ductility after aging is more than 50, and the above detection indexes show that the high-elasticity modified asphalt for bridge deck pavement can effectively meet the environmental use requirements of most areas in Guizhou.
Dynamic viscosity at 60 DEG C
The dynamic viscosity at 60 ℃ is the basic performance index of the high-viscosity high-elasticity asphalt product, the dynamic viscosity at 60 ℃ of the asphalt material on a drainage pavement or a bridge deck pavement layer should be higher than 20000Pa & sec, and the viscosity index becomes the most basic index for evaluating the performance of the high-viscosity high-elasticity asphalt along with the research and development and application of various modified high-viscosity asphalts.
TABLE 5 viscosity at 60 ℃ of high-elastic modified asphalt and SBS modified asphalt
From the above table, it can be seen that the dynamic viscosity at 60 ℃ of the high-elasticity modified asphalt is higher than 20000Pa $, and the above detection index indicates that the high-elasticity modified asphalt for bridge deck pavement can effectively meet the environmental use requirement in most areas in Guizhou province.
Elastic recovery:
the elastic recovery is one of the important indexes of the high-elasticity modified asphalt and is also an important factor for determining the paving effect of the bridge deck.
TABLE 6 elastic recovery of high-elasticity modified asphalt and SBS modified asphalt
From the above table, the elastic recovery of the high-elastic modified asphalt is 99, which is 4 points higher than that of SBS modified asphalt, and the above detection indexes show that the high-elastic modified asphalt for bridge deck pavement can effectively meet the environmental use requirements of most areas in Guizhou province.
DSR
Dynamic shear rheology test (DSR) evaluates the rheological properties of asphalt cement by characterizing the viscous and elastic properties of asphalt cement by measuring the complex shear modulus and phase angle of the asphalt cement. In PG classification of SHRP asphalt cement, a function of rheological property parameters is used as a technical index for evaluating the high-temperature characteristic of the asphalt cement, and the function is also called a rutting factor. The larger the rutting factor is, the less the asphalt cement is damaged at high temperature, the flow deformation capability is weakened, and the rutting resistance is improved, and the specific test results are as follows:
TABLE 7 DSR (before TFOT) of high-elastic modified asphalt, SBS modified asphalt
TABLE 8 DSR (after TFOT) of high-elastic modified asphalt, SBS modified asphalt
Test knot according to the aboveThe modified asphalt is classified according to SHRP specification as follows: the common modified asphalt is PG82-22 grade, and the high-elasticity modified asphalt is PG76-34 grade. From the SHRP grading result, although the high-temperature grading of the high-elasticity asphalt is reduced by one grade, the low-temperature grading performance of the PAV residual asphalt is greatly improved, the low-temperature use temperature range is reduced by 12 ℃, and in addition, the PAV residual asphalt G＊The sin delta results also show that the fatigue performance of the high-elasticity modified asphalt is greatly improved. The detection indexes show that the high-elasticity modified asphalt for bridge deck pavement can effectively meet the environmental use requirements of most areas in Guizhou.
BBR：
A Bending Beam Rheometer (BBR) is developed by the American SHRP plan to evaluate the low-temperature rheological property of the asphalt material and measure the stiffness of an asphalt trabecula test piece under the action of creep load, and a BBR test can simulate the temperature shrinkage cracking process of the asphalt material after aging, so that the low-temperature brittle elasticity property of the prepared high-elasticity asphalt material can be measured. The specific test results are as follows:
TABLE 9 BBR of high-elasticity modified asphalt and SBS modified asphalt
From the above table, although the low-temperature brittleness elasticity of the high-elastic modified asphalt is slightly lower than that of the SBS modified asphalt, the high-elastic modified asphalt meets the standard requirement, and the detection indexes show that the high-elastic modified asphalt for bridge deck pavement can effectively meet the environmental use requirement in most areas of Guizhou.
The trial of nearly one year proves that the high-elasticity modified asphalt for bridge deck pavement provided by the invention can be effectively applied to the environments with strong ultraviolet rays, much rainwater and large temperature difference, and the service life of the bridge deck pavement is prolonged under the condition of greatly improving the elasticity and the anti-cracking capacity of the bridge deck pavement.
It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.
Claims (4)
1. The high-elasticity modified asphalt for bridge deck pavement is characterized by comprising the following components in parts by weight: matrix petroleum asphalt: 84 parts of a styrene-butadiene-styrene block copolymer: 4.2 parts of ethylene-vinyl acetate copolymer: 3 parts of vinyltriethoxysilane: 13 parts.
2. The high resilience modified asphalt for bridge deck pavement of claim 1, further comprising 0.16 parts by weight of a stabilizer.
3. The high elastic modified asphalt for bridge deck pavement according to claim 1, which is prepared by the method comprising,
step A, heating the matrix petroleum asphalt to 170 ℃, adding a styrene-butadiene-styrene block copolymer, an ethylene-vinyl acetate copolymer and vinyl triethoxysilane, and fully stirring and circulating for 30 min;
b, carrying out high-speed shearing for 30min under the conditions that the temperature is 180-195 ℃ and the shearing rate is 4000 r/min;
and step C, after the shearing is stopped, stirring and heating to 180 ℃, and stirring and developing for 1.5 hours at the temperature of 180-190 ℃ to obtain a high-elasticity modified asphalt finished product.
4. The high elastic modified asphalt for bridge deck pavement according to claim 3, wherein in step C, after the shearing is stopped, 0.16 parts by weight of the stabilizer is further added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111594356.9A CN114106573A (en) | 2021-12-24 | 2021-12-24 | High-elastic modified asphalt for bridge deck pavement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111594356.9A CN114106573A (en) | 2021-12-24 | 2021-12-24 | High-elastic modified asphalt for bridge deck pavement |
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| CN114106573A true CN114106573A (en) | 2022-03-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07150050A (en) * | 1993-11-26 | 1995-06-13 | Bridgestone Corp | Asphalt paving composition |
| CN102838874A (en) * | 2012-09-17 | 2012-12-26 | 山东建筑大学 | Asphalt modifier, modified asphalt and asphalt mixture |
| CN103788668A (en) * | 2013-12-30 | 2014-05-14 | 长沙理工大学 | Composite modified asphalt and preparation method thereof |
| CN108467596A (en) * | 2018-02-09 | 2018-08-31 | 北京欧美中科学技术研究院 | A kind of waste thermosetting modifying plastics pitch and preparation method thereof |
| CN109943086A (en) * | 2019-04-08 | 2019-06-28 | 上海道淳交通科技有限公司 | A kind of oil rub resistance modified pitch and preparation method thereof |
| CN110408340A (en) * | 2019-07-31 | 2019-11-05 | 广西禹杰防水防腐材料有限公司 | A kind of reaction bonded wet-laying polymer membranes and preparation method thereof |
| CN112681098A (en) * | 2020-12-30 | 2021-04-20 | 贵州黔和物流有限公司 | Application method of asphalt for repairing cracks on highway pavement |
-
2021
- 2021-12-24 CN CN202111594356.9A patent/CN114106573A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07150050A (en) * | 1993-11-26 | 1995-06-13 | Bridgestone Corp | Asphalt paving composition |
| CN102838874A (en) * | 2012-09-17 | 2012-12-26 | 山东建筑大学 | Asphalt modifier, modified asphalt and asphalt mixture |
| CN103788668A (en) * | 2013-12-30 | 2014-05-14 | 长沙理工大学 | Composite modified asphalt and preparation method thereof |
| CN108467596A (en) * | 2018-02-09 | 2018-08-31 | 北京欧美中科学技术研究院 | A kind of waste thermosetting modifying plastics pitch and preparation method thereof |
| CN109943086A (en) * | 2019-04-08 | 2019-06-28 | 上海道淳交通科技有限公司 | A kind of oil rub resistance modified pitch and preparation method thereof |
| CN110408340A (en) * | 2019-07-31 | 2019-11-05 | 广西禹杰防水防腐材料有限公司 | A kind of reaction bonded wet-laying polymer membranes and preparation method thereof |
| CN112681098A (en) * | 2020-12-30 | 2021-04-20 | 贵州黔和物流有限公司 | Application method of asphalt for repairing cracks on highway pavement |
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Application publication date: 20220301 |