CN113817330A - Permeable asphalt and improved construction method thereof - Google Patents
Permeable asphalt and improved construction method thereof Download PDFInfo
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- CN113817330A CN113817330A CN202111083658.XA CN202111083658A CN113817330A CN 113817330 A CN113817330 A CN 113817330A CN 202111083658 A CN202111083658 A CN 202111083658A CN 113817330 A CN113817330 A CN 113817330A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 152
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000004034 viscosity adjusting agent Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010920 waste tyre Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000011859 microparticle Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 238000012986 modification Methods 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims abstract description 7
- 239000010881 fly ash Substances 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 22
- 229920000728 polyester Polymers 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 12
- 230000035515 penetration Effects 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003607 modifier Substances 0.000 abstract description 3
- 235000010755 mineral Nutrition 0.000 description 8
- 238000011160 research Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000011384 asphalt concrete Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 239000002699 waste material Substances 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
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
- E01C11/165—Reinforcements particularly for bituminous or rubber- or plastic-bound pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention relates to the technical field of asphalt pavement construction methods, and discloses a permeable asphalt and an improved construction method thereof, 1) the asphalt is subjected to composite modification by using rubber powder and HVA high-viscosity modifier, so that the cohesiveness of the asphalt is improved; 2) the permeable asphalt is heated to 180 ℃ and is in a flowing state, and four proportions of 6%, 8%, 10% and 12% of micro-particle HVA high-viscosity modifier are respectively added into the permeable asphalt. The permeable asphalt and the improved construction method thereof can reduce the influence of water damage on the service life of the asphalt pavement, can greatly prolong the service life of the pavement, can greatly improve the viscosity of the asphalt by doping the small particle HVA modifier and a proper amount of rubber powder, can comprehensively improve the high and low temperature resistance and the fatigue resistance of the asphalt mixture so as to improve the stability of the permeable asphalt pavement in high-temperature areas and cold areas, and can improve the pavement performance and relieve the environmental pressure brought by waste tires by combining the waste tires with the permeable asphalt pavement.
Description
Technical Field
The invention relates to the technical field of asphalt pavement construction methods, in particular to permeable asphalt and an improved construction method thereof.
Background
The water-based asphalt pavement is a pavement which uses a macroporous mixture as a surface layer and adopts a compact mixture as a middle and lower layer asphalt surface layer;
the road surface can effectively reduce noise, improve the skid resistance of the road surface and prevent water mist and water drift during driving, and meanwhile, the rough surface texture of the road surface can reduce sunlight in the daytime and diffuse reflection generated by lamplight at night and reduce the adverse effect caused by glare. It is these characteristics of permeable asphalt pavement that make such pavement widely used. However, the existing common permeable asphalt pavement has poor temperature stability, is easy to crack in winter and soften in summer, and the large porosity of the permeable asphalt pavement enables water to easily permeate into the bonding position of aggregate and asphalt, so that the problems of low bonding property of an asphalt mixture, poor water resistance, easy water generation damage and the like are increasingly prominent.
The porous characteristic of the permeable asphalt pavement can absorb traffic noise and has a noise reduction function, so that the asphalt pavement can play roles of skid resistance and noise reduction at present with higher and higher fast development living standard and is touted by home and abroad;
the pervious asphalt concrete originated in europe, germany began to pave asphalt concrete pavements in 1960, usa began to research a graded anti-skid wearing layer in 1970, 1973 began to popularize, 1982, accumulated pavement reached 1500km, uk began to develop a pervious asphalt concrete pavement at the end of 1950, and the pavement was first paved on an airport runway, and the pavement was first applied to a highway in 1960, and then various test road sections were constructed, and durability and noise reduction performance of the pavement were examined by using different asphalt cements and adding slaked lime, and the like, and dutch began to research a pervious asphalt mixture in 1972, and according to local conditions, an asphalt mixture suitable for the situation of the country was developed by adding lime to the mixture to improve adhesion, and a good effect was obtained, whereby the paved pavement could eliminate ground water, reduce glare and rapidly increase anti-skid performance of the pavement, the traffic accidents are greatly reduced when the automobile is driven in rainy days, the research in Japan is late, but the development is rapid, the automobile is introduced from 1980, the automobile is laid for the first time in 1987, and through a large amount of practices and researches, the automobile has been found to have the following characteristics: the porous asphalt pavement can achieve the purposes of noise reduction and safety, so the porous asphalt pavement is popularized and used in Japan, and the pavement is applied to all levels of roads in 1990;
the porous asphalt concrete pavement is researched and applied more abroad, the technology is introduced only after the 80 th century in China, a porous pavement test road section is laid for the first time in Hangzhou-Jinhua in 1996, then the Japanese technology is adopted to cooperate with Japanese companies to finish the laying of 1.4 km of porous asphalt pavement and porous asphalt pavement of a highway at Xian airport in Pudong, the highway at the Xian airport is the first project of using the porous asphalt pavement in large scale in China, the research institute of China and colleges and universities begin to research the service performance of the porous asphalt pavement under the conditions of high temperature and heavy traffic in 2005, the test result is applied to the actual project, then a great deal of research is started on various performances of the permeable asphalt mixture, and the Shangzhi of Tianjin City design institute just compares the road performances before and after thermal aging of the 70# matrix asphalt OGFC asphalt mixture and the SBS modified asphalt OGFC asphalt mixture, it was found that the water stability of both modified asphalt mixtures was reduced after aging, but the high temperature stability was improved, and the test results showed that: the road performance of the two modified asphalt mixtures before and after aging is superior to that of the matrix asphalt mixture, and the like rely on stone families and plain and western road porous asphalt projects, compare and analyze road safety performance of the porous asphalt pavement and the SMA pavement, simulate rainfall and perform a braking test, and find that the porous asphalt pavement can reduce the braking distance by 12-18% along with the increase of vehicle speed or rainfall, and has particularly remarkable anti-skid performance.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the permeable asphalt and the improved construction method thereof, which can enhance the cohesiveness and the temperature stability of the permeable asphalt pavement, improve the anti-cracking and anti-fatigue performances of the asphalt pavement and reduce the influence of natural and man-made factors on the stable state of the asphalt. Therefore, the maintenance period of the whole permeable asphalt pavement can be prolonged, the maintenance cost is reduced, the service life of the pavement is prolonged, the safety and the attractiveness of the whole network are improved, and the problems in the background art are solved.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a permeable asphalt and an improved construction method thereof comprise the following steps:
1) rubber powder and HVA high-viscosity modifier are used for carrying out composite modification on the asphalt, so that the cohesiveness of the asphalt is improved;
2) heating the permeable asphalt to 180 ℃ to enable the permeable asphalt to be in a flowing state, and respectively adding 6%, 8%, 10% and 12% of micro-particle HVA high-viscosity modifier;
3) rubber powder prepared from waste tires with grain sizes of 30 meshes, 60 meshes and 90 meshes is adopted, and a permeable asphalt mixture is doped according to the proportion of 5%, 10%, 15% and 20% respectively;
4) through the experimental tests of penetration, ductility, softening point and dynamic viscosity at 60 ℃ on each modified sample test piece, the influence of the penetration, ductility, softening point and dynamic viscosity at 60 ℃ on the bonding performance is analyzed, and the optimal mixing proportion of the small particle HVA high-viscosity modifier and the particle size and proportion of the rubber powder are obtained.
Preferably, the aim of improving the temperature stability of the asphalt pavement is fulfilled by compounding the fly ash and the polyester fiber into the asphalt mixture.
Preferably, 20%, 40%, 60%, 80% and 100% of fly ash is respectively used for replacing mineral powder in the asphalt, so that the water stability of the asphalt is improved, and the Marshall stability of the asphalt mixture is improved.
Preferably, the polyester fiber is uniformly blended into the asphalt in the proportion of 0.3%, 0.4% and 0.5% respectively, and two different lengths of 6.0mm and 9.0mm are selected respectively, and the orthogonal experiment is carried out.
Preferably, and by means of electron microscopy scanning techniques in combination with Marshall stability, flow number, Marshall modulus and rutting tests.
Preferably, the optimal blending ratio of the fly ash and the polyester fiber is obtained according to the analysis of the influence of different blending ratios on the temperature performance of the permeable asphalt pavement.
(III) advantageous effects
Compared with the prior art, the invention provides the permeable asphalt and the improved construction method thereof, and the permeable asphalt has the following beneficial effects:
1. the permeable asphalt and the improved construction method thereof can reduce the influence of water damage on the service life of the asphalt pavement, greatly prolong the service life of the pavement and improve the safety index of the pavement. The viscosity of the asphalt can be greatly improved by doping the micro-particle HVA modifier and a proper amount of rubber powder, and the high and low temperature resistance and the fatigue resistance of the asphalt mixture can be comprehensively improved, so that the use stability of the permeable asphalt pavement in high-temperature areas and cold areas is improved. The waste tires and the permeable asphalt pavement are combined, so that the pavement performance can be improved, the environmental pressure caused by the waste tires can be relieved, the environment is protected, the energy is saved, and the implementation cost is controllable.
2. The permeable asphalt and the improved construction method thereof have positive influence on improving the temperature stability of the permeable asphalt mixture by adding a proper amount of fly ash and polyester fiber. The addition of a small amount of fly ash can also fill gaps which cannot be filled by mineral powder, so that the overall strength is enhanced; secondly, the specific surface area of the fly ash is large, the more the adsorbed asphalt light components are, the larger the viscous resistance of the asphalt mortar is, and the stronger the deformation resistance is; and the hydrophilic coefficient of the fly ash is lower than that of the mineral powder, so that the erosion of water can be reduced, and the stability of a pavement is enhanced. A small amount of polyester fibers can be uniformly distributed in the asphalt mixture, and the cross reinforcement and bridging effect can reduce the fluidity of asphalt and limit the displacement of aggregate; and secondly, the polyester fiber has larger elongation at break and certain elasticity, so that the test piece can deform greatly within a certain load range without being damaged, and the deformation resistance of the asphalt mixture can be kept while the temperature performance of the asphalt mixture is kept.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a permeable asphalt and an improved construction method thereof comprise the following steps:
1) carrying out composite modification on asphalt by using rubber powder and an HVA high-viscosity modifier so as to improve the cohesiveness of the asphalt;
2) heating the permeable asphalt to 180 ℃ to enable the permeable asphalt to be in a flowing state, and adding a 6% proportion of micro-particle HVA high-viscosity modifier;
3) rubber powder prepared from waste tires with the grain diameter of 30 meshes is adopted, and 5 percent of the rubber powder is mixed into a permeable asphalt mixture;
4) through the experimental tests of penetration, ductility, softening point and dynamic viscosity at 60 ℃ on each modified sample test piece, the influence of the penetration, ductility, softening point and dynamic viscosity at 60 ℃ on the bonding performance is analyzed, and the optimal mixing proportion of the small particle HVA high-viscosity modifier and the particle size and proportion of the rubber powder are obtained.
Aiming at the problems of poor temperature stability, easy brittle fracture in winter and easy softening in summer of the traditional drainage asphalt pavement, the aim of improving the temperature stability of the asphalt pavement is fulfilled by compounding the asphalt mixture by the fly ash and the polyester fiber.
20 percent of fly ash is adopted to replace mineral powder in asphalt, so that the water stability of the asphalt is improved, and the Marshall stability of the asphalt mixture is improved.
The polyester fibers with the proportion of 0.3 percent are respectively selected and two different lengths of 6.0mm and 9.0mm are respectively uniformly mixed into the asphalt through orthogonal experiments.
And the Marshall stability, flow value, Marshall modulus and rutting test are combined by means of an electron microscope scanning technology.
According to the analysis of the influence of different proportions on the temperature performance of the permeable asphalt pavement, the optimal blending proportion of the fly ash and the polyester fiber is obtained.
Example two:
1) carrying out composite modification on asphalt by using rubber powder and an HVA high-viscosity modifier so as to improve the cohesiveness of the asphalt;
2) heating the permeable asphalt to 180 ℃ to enable the permeable asphalt to be in a flowing state, and adding a 10% proportion of micro-particle HVA high-viscosity modifier;
3) rubber powder prepared from waste tires with the grain diameter of 60 meshes is adopted, and 15 percent of the rubber powder is mixed into a permeable asphalt mixture;
4) through the experimental tests of penetration, ductility, softening point and dynamic viscosity at 60 ℃ on each modified sample test piece, the influence of the penetration, ductility, softening point and dynamic viscosity at 60 ℃ on the bonding performance is analyzed, and the optimal mixing proportion of the small particle HVA high-viscosity modifier and the particle size and proportion of the rubber powder are obtained.
Aiming at the problems of poor temperature stability, easy brittle fracture in winter and easy softening in summer of the traditional drainage asphalt pavement, the aim of improving the temperature stability of the asphalt pavement is fulfilled by compounding the asphalt mixture by the fly ash and the polyester fiber.
60 percent of fly ash is adopted to replace mineral powder in asphalt, so that the water stability of the asphalt is improved, and the Marshall stability of the asphalt mixture is improved.
The polyester fibers with the proportion of 0.4 percent are respectively selected and two different lengths of 6.0mm and 9.0mm are respectively uniformly mixed into the asphalt through orthogonal experiments.
And the Marshall stability, flow value, Marshall modulus and rutting test are combined by means of an electron microscope scanning technology.
According to the analysis of the influence of different proportions on the temperature performance of the permeable asphalt pavement, the optimal blending proportion of the fly ash and the polyester fiber is obtained.
Example three:
1) carrying out composite modification on asphalt by using rubber powder and an HVA high-viscosity modifier so as to improve the cohesiveness of the asphalt;
2) heating the permeable asphalt to 180 ℃ to enable the permeable asphalt to be in a flowing state, and adding 12% of micro-particle HVA high-viscosity modifier;
3) rubber powder prepared from waste tires with the grain diameter of 90 meshes is adopted, and 20 percent of the rubber powder is mixed into a permeable asphalt mixture;
4) through the experimental tests of penetration, ductility, softening point and dynamic viscosity at 60 ℃ on each modified sample test piece, the influence of the penetration, ductility, softening point and dynamic viscosity at 60 ℃ on the bonding performance is analyzed, and the optimal mixing proportion of the small particle HVA high-viscosity modifier and the particle size and proportion of the rubber powder are obtained.
Aiming at the problems of poor temperature stability, easy brittle fracture in winter and easy softening in summer of the traditional drainage asphalt pavement, the aim of improving the temperature stability of the asphalt pavement is fulfilled by compounding the asphalt mixture by the fly ash and the polyester fiber.
The 100% fly ash is adopted to replace mineral powder in the asphalt, so that the water stability of the asphalt is improved, and the Marshall stability of the asphalt mixture is improved.
Polyester fibers in a proportion of 0.5% and 9.0mm were selected for incorporation into the bitumen by means of an orthogonal experiment.
And by means of the electron microscope scanning technology combined with Marshall stability, flow value, Marshall modulus and track test,
according to the analysis of the influence of different proportions on the temperature performance of the permeable asphalt pavement, the optimal blending proportion of the fly ash and the polyester fiber is obtained.
The invention has the beneficial effects that: the influence of water damage on the service life of the asphalt pavement can be reduced, the service life of the pavement can be greatly prolonged, and the safety index of pavement use can be improved. The viscosity of the asphalt can be greatly improved by doping the micro-particle HVA modifier and a proper amount of rubber powder, and the high and low temperature resistance and the fatigue resistance of the asphalt mixture can be comprehensively improved, so that the use stability of the permeable asphalt pavement in high-temperature areas and cold areas is improved. The waste tires and the permeable asphalt pavement are combined, so that the pavement performance can be improved, the environmental pressure caused by the waste tires can be relieved, the environment is protected, the energy is saved, and the implementation cost is controllable;
by adding a proper amount of fly ash and polyester fiber, the temperature stability of the permeable asphalt mixture is positively influenced. The addition of a small amount of fly ash can also fill gaps which cannot be filled by mineral powder, so that the overall strength is enhanced; secondly, the specific surface area of the fly ash is large, the more the adsorbed asphalt light components are, the larger the viscous resistance of the asphalt mortar is, and the stronger the deformation resistance is; and the hydrophilic coefficient of the fly ash is lower than that of the mineral powder, so that the erosion of water can be reduced, and the stability of a pavement is enhanced. A small amount of polyester fibers can be uniformly distributed in the asphalt mixture, and the cross reinforcement and bridging effect can reduce the fluidity of asphalt and limit the displacement of aggregate; and secondly, the polyester fiber has larger elongation at break and certain elasticity, so that the test piece can deform greatly within a certain load range without being damaged, and the deformation resistance of the asphalt mixture can be kept while the temperature performance of the asphalt mixture is kept.
Expected achievement content, application prospect and benefit:
the method has a very positive significance for improving and promoting the composite permeable asphalt pavement, most of the existing permeable asphalt pavements are puzzled by the problems of cracking, pot holes, loosening and the like caused by structural characteristics and natural artificial influence, the service life and the safety coefficient of the permeable asphalt pavement are greatly improved by applying the research and development technology, the maintenance and repair cost is remarkably reduced, the waste rubber powder prepared by applying waste tires and the fly ash generated by using coal are changed into valuable, the ecological environment and the living environment can be improved, and the method has a very wide application prospect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The permeable asphalt and the improved construction method thereof are characterized by comprising the following steps:
1) rubber powder and HVA high-viscosity modifier are used for carrying out composite modification on the asphalt, so that the cohesiveness of the asphalt is improved;
2) heating the permeable asphalt to 180 ℃ to enable the permeable asphalt to be in a flowing state, and respectively adding 6%, 8%, 10% and 12% of micro-particle HVA high-viscosity modifier;
3) rubber powder prepared from waste tires with grain sizes of 30 meshes, 60 meshes and 90 meshes is adopted, and a permeable asphalt mixture is doped according to the proportion of 5%, 10%, 15% and 20% respectively;
4) and respectively testing penetration, ductility, softening point and dynamic viscosity at 60 ℃ of each modified sample test piece, and analyzing the influence of the penetration, ductility, softening point and dynamic viscosity on the bonding performance to obtain the optimal mixing proportion of the small particle HVA high-viscosity modifier and the particle size and proportion of the rubber powder.
2. The permeable asphalt and the improved construction method thereof according to claim 1, characterized in that the temperature stability of the asphalt pavement is improved by compounding the asphalt mixture with fly ash and polyester fiber.
3. The permeable asphalt and the improved construction method thereof according to claim 2, wherein 20%, 40%, 60%, 80% and 100% of fly ash is used to replace mineral powder in asphalt, so as to improve the water stability of asphalt, thereby increasing the Marshall stability of asphalt mixture.
4. The permeable asphalt and the improved construction method thereof as claimed in claim 3, wherein the polyester fiber is selected from polyester fiber in the ratio of 0.3%, 0.4% and 0.5%, and the two different lengths of 6.0mm and 9.0mm are selected to be uniformly mixed into the asphalt through orthogonal experiment.
5. The permeable asphalt and the improved construction method thereof according to claim 4, wherein Marshall stability, flow value, Marshall modulus and rutting test are combined by means of electron microscope scanning technique.
6. The permeable asphalt and the improved construction method thereof according to claim 5, wherein the optimum blending ratio of fly ash and polyester fiber is obtained according to the analysis of the influence of different blending ratios on the temperature performance of the permeable asphalt pavement.
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| CN202111083658.XA CN113817330A (en) | 2021-09-15 | 2021-09-15 | Permeable asphalt and improved construction method thereof |
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| CN202111083658.XA CN113817330A (en) | 2021-09-15 | 2021-09-15 | Permeable asphalt and improved construction method thereof |
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Application publication date: 20211221 |