CN107337381A - Small particle open gradation asphalt for ultrathin overlay - Google Patents
Small particle open gradation asphalt for ultrathin overlay Download PDFInfo
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- CN107337381A CN107337381A CN201710675813.4A CN201710675813A CN107337381A CN 107337381 A CN107337381 A CN 107337381A CN 201710675813 A CN201710675813 A CN 201710675813A CN 107337381 A CN107337381 A CN 107337381A
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- weight
- small particle
- open gradation
- asphalt
- ultrathin overlay
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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
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
- E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
-
- 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
Abstract
The invention provides a kind of small particle open gradation asphalt for ultrathin overlay, including 85% weight~92% the gathering materials of weight, 2% weight~8% weight filler and the weight of 5.5% weight~7.5% polymer modified asphalt, nominal maximum particle diameter is 4.75mm, and pave-load layer thickness is 1.0cm~1.5cm.It is preferred that gather materials for basalt or diabase.Filler is the mixture of limestone mineral powder and cement, and the mass ratio of limestone mineral powder and cement is 1:1~3:1.Polymer modified asphalt is POE composite modified asphalts, 60 DEG C of zero-shear viscosity >=30000Pa.s, softening point >=90 DEG C.The small particle open gradation asphalt for ultrathin overlay of the present invention can not only be thinned cover thickness, reduces construction costs and reduce driving noise, and two grades of hard stones of 3~5mm and 0~3mm can be utilized, mitigate large-scale application SMA road surfaces and cause corresponding building stones superfluous environment and resource pressure, it is ingenious in design, prepare easy, cost is low, suitable for large-scale promotion application.
Description
Technical field
The present invention relates to pavement construction material technical field, more particularly, to the asphalt for ultrathin overlay
Technical field, particularly relate to a kind of small particle open gradation asphalt for ultrathin overlay.
Background technology
Currently, China's road generally face the volume of traffic is growing, vehicle maximization development, heavy duty overload remain incessant after repeated prohibition,
The problems such as vehicle canalized traffic is serious, bituminous paving operation are also easy to produce loose, crack, antiskid the performance surface such as decay rapidly initial stage
Layer function damages, and influences performance and the life-span on road surface.The pavement structure for the damage of asphalt road-surface layer function
The problem of intensity is good, when and where select which kind of technical measures to repair superficial layer, be always bituminous pavement preventative
One of focus of maintenance technology research.
With Novachip, micro-surface area etc. for the preventive maintenance application of representative most universal, technical system comparative maturity,
But still suffer from some problems.The nominal maximum particle diameter that the thin layers such as Novachip are mated formation is generally 13.2mm or 9.5mm, its thickness of mating formation
Degree is thicker, is 2.0cm~3.0cm.Micro-surface area uses modified emulsifying asphalt cold mixing construction technology, although pavement thickness is 1.0cm,
But its nominal maximum particle diameter is 9.5mm, coarse aggregate does not form embedded squeezing structure, there is that noise is big, is also easy to produce rut and loose etc.
Problem.
Accordingly, it is desirable to provide a kind of asphalt for ultrathin overlay, it can be thinned cover thickness, reduce engineering
Cost and reduction driving noise.
The content of the invention
In order to overcome it is above-mentioned in the prior art the shortcomings that, it is an object of the present invention to provide one kind to be used for ultrathin overlay
Small particle open gradation asphalt, its can be thinned cover thickness, reduce construction costs and reduce driving noise, suitable for big
Scale popularization and application.
Another object of the present invention is to provide a kind of small particle open gradation asphalt for ultrathin overlay, its energy
Two grades of hard stones of 3~5mm and 0~3mm are enough utilized, mitigate large-scale application SMA (Stone mastic asphalt, pitch
Mastic-broken stone mixture) road surface and cause corresponding building stones superfluous environment and resource pressure, suitable for large-scale promotion application.
Another object of the present invention is to provide a kind of small particle open gradation asphalt for ultrathin overlay, it sets
Count ingenious, prepare easy, cost is low, suitable for large-scale promotion application.
To achieve the above objectives, the invention provides a kind of small particle open gradation asphalt for ultrathin overlay,
Be characterized in, the gathering materials of the weight of including 85% weight~92%, 2% weight~8% weight filler and 5.5% weight~
The polymer modified asphalt of 7.5% weight, the nominal of the described small particle open gradation asphalt for ultrathin overlay is most
Big particle diameter is 4.75mm, and the pave-load layer thickness of the described small particle open gradation asphalt for ultrathin overlay is 1.0cm
~1.5cm.
It is described gather materials can be it is any suitably gather materials, it is preferred that described gather materials for basalt or diabase.
It is described to gather materials and be suitably composed with any, it is preferred that described gather materials including 3mm~5mm continuous gradings
First gathers materials gathers materials with the second of 0mm~3mm continuous gradings, described first gather materials with second mass ratio to gather materials be 75~
80：20~25.
The filler can be any suitable filler, it is preferred that the filler is the mixing of limestone mineral powder and cement
The mass ratio of thing, the limestone mineral powder and the cement is 1:1~3:1.
It is described gather materials can be determined as needed with the grading limit of the filler, it is preferred that it is described gather materials filled out with described
The grading limit of material meets claimed below：
The polymer modified asphalt can be any suitable polymer modified asphalt, it is preferred that the polymer changes
Property pitch is POE composite modified asphalts, and 60 DEG C of zero-shear viscosity >=30000Pa.s of the POE composite modified asphalts are described
Softening point >=90 DEG C of POE composite modified asphalts.
The POE composite modified asphalts can be suitably composed with any, more preferably, the POE composite modified asphalts
Including hard grades of bitumen, modifying agent, warm-mixing agent and the Interface enhancer that needle penetration is 20~60, the modifying agent is polyolefin elastic
Body POE, the modifying agent are the weight of 8% weight~14% of the hard grades of bitumen, and the warm-mixing agent is the hard grades of bitumen
The weight of 1% weight~3%；The Interface enhancer for the hard grades of bitumen the weight of 0.3% weight~1.0%.
The needle penetration of the hard grades of bitumen can determine as needed, it is preferred that the needle penetration of the hard grades of bitumen is 20
~60 (0.1mm).So-called needle penetration is to represent the soft or hard degree of pitch and denseness, the ability for resisting failure by shear, is reflected in certain
Under the conditions of pitch relative viscosity index, be that under 100 grams of loading, standard can be penetrated vertically in 25 DEG C and 5 second time
The depth of bitumen samples, in units of 1/10 millimeter.
The hard grades of bitumen can be any suitable hard grades of bitumen, and the warm-mixing agent can be any suitable warm mix
Agent, the Interface enhancer can be any suitable Interface enhancers, and further, the hard grades of bitumen is No. 30 pitches
Or No. 50 pitches；The warm-mixing agent is Tissuemat E；The Interface enhancer is silane coupler.The Tissuemat E is ability
Domain routinely use, be it is a kind of synthesize straight-chain aliphatic hydrocarbon mixture, the long-chain fat containing 40~120 carbon atoms
Fat hydrocarbon, its fusing point is at 100 DEG C or so.The silane coupler is used to strengthening the POE composite modified asphalts to gather materials with described
Adhesiveness.
The melt index of the modifying agent can determine as needed, further, the melt index of the modifying agent
For 1dg/min~10dg/min.
The described small particle open gradation asphalt for ultrathin overlay can have any suitable performance, preferably
Ground, the volume of the connectivity gap rate of the described small particle open gradation asphalt for ultrathin overlay >=12%, described use
≤ 10% weight is lost in the Superpave mix-design of the small particle open gradation asphalt of ultrathin overlay, described is used for ultra-thin cover
Dynamic stability >=3500 time/mm of the small particle open gradation asphalt in face, the described small particle for ultrathin overlay are opened
Freeze-thaw split retained strength ratio >=85% of grading asphalt, the described small particle open gradation pitch for ultrathin overlay
The coefficient of friction BPN of compound20>=55, the construction depth of the described small particle open gradation asphalt for ultrathin overlay
>=0.8mm, infiltration coefficient >=2000mL/min of the described small particle open gradation asphalt for ultrathin overlay.
The beneficial effects of the present invention are：
(1) the small particle open gradation asphalt for ultrathin overlay of the invention including 85% weight~92% weight
Gather materials, the polymer modified asphalt of the weight of the filler of the weight of 2% weight~8% and 5.5% weight~7.5%, for ultra-thin
The nominal maximum particle diameter of the small particle open gradation asphalt of cover is 4.75mm, and pave-load layer thickness is 1.0cm~1.5cm,
Therefore, it can be thinned cover thickness, reduce construction costs and reduce driving noise, suitable for large-scale promotion application.
(2) the small particle open gradation asphalt for ultrathin overlay of the invention including 85% weight~92% weight
Gather materials, the polymer modified asphalt of the weight of the filler of the weight of 2% weight~8% and 5.5% weight~7.5%, for ultra-thin
The nominal maximum particle diameter of the small particle open gradation asphalt of cover is 4.75mm, and pave-load layer thickness is 1.0cm~1.5cm,
Therefore, it can make full use of two grades of hard stones of 3~5mm and 0~3mm, mitigate large-scale application SMA road surfaces and cause corresponding
Building stones superfluous environment and resource pressure, suitable for large-scale promotion application.
(3) the small particle open gradation asphalt for ultrathin overlay of the invention including 85% weight~92% weight
Gather materials, the polymer modified asphalt of the weight of the filler of the weight of 2% weight~8% and 5.5% weight~7.5%, for ultra-thin
The nominal maximum particle diameter of the small particle open gradation asphalt of cover is 4.75mm, and pave-load layer thickness is 1.0cm~1.5cm,
Therefore, its is ingenious in design, prepares simplicity, cost is low, suitable for large-scale promotion application.
These and other objects, feature and the advantage of the present invention, is filled by following detailed descriptions and claim
Split shows, and can be achieved by means, device and the combinations thereof specially pointed out in appended claims.
Embodiment
In order to be more clearly understood that the technology contents of the present invention, described in detail especially exemplified by following examples.All hundred
Point rate is weight percent, unless otherwise specified.
Embodiment 1
The small particle open gradation asphalt for ultrathin overlay of the present embodiment, including the gathering materials of 85% weight,
The POE composite modified asphalts of the filler of 7.5% weight and 7.5% weight.It is used to gather materials for the profound of Jintan Fu Lu Zha Shi factories production
Wu Yan (basalt of 3mm~5mm continuous gradings and the basalt in mass ratio 78 of 0mm~3mm continuous gradings：22 mixing and
Into)；Filler used is limestone mineral powder and the production of Anhui Conch Cement limited company of Jiangxi elder brother Thailand mineral powder plant production
The mixture of the cement of P.O 42.5, mass ratio 1:1.
It is used gather materials it is as follows with the grading of filler used：
| Screen size (mm) | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Pass through percentage (%) | 100 | 95 | 40 | 25 | 15 | 12 | 12 | 10 |
POE composite modified asphalts used include following components：(Sinopec Zhenghai oil-refining chemical share has No. 50 pitches
Limit company) 100 parts by weight, POE modifying agent (the 7256 of Dow Chemical Co., Ltd, melt index 10dg/min) 10 weights
Measure part, Tissuemat E (Sasobit of South Africa Sasol companies) 2 parts by weight and Interface enhancer (the limited public affairs of Jiangsu morning twilight coupling agent
Department, CG-301) 0.5 parts by weight.
60 DEG C of zero-shear viscosities of POE composite modified asphalts are 30000Pa.s, and softening point is 90 DEG C.
Main performance testing results such as table 1 for the small particle open gradation asphalt of ultrathin overlay.Wherein, connect
The method of testing reference of voidage《Asphalt paving technical regulation》(CJJ/T 190-2012) appendix A, Superpave mix-design damage
The method of testing reference of mistake《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011) T0733-2011, move
The method of testing reference of stability《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011)T0719-
2011, freeze-thaw split retained strength than method of testing reference《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG
E20-2011) T0729-2000, the method for testing reference of infiltration coefficient《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0971-2008, the method for testing reference of construction depth《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0961-1995, the method for testing reference of coefficient of friction《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008)T 0964-2008。
Table 1 is used for the main performance testing results of the small particle open gradation asphalt of ultrathin overlay
| Sequence number | Technical indicator | Unit | Technical performance |
| 1 | Connectivity gap rate | % volumes | 13.2 |
| 2 | Superpave mix-design loses | % weight | 10 |
| 3 | Dynamic stability | Secondary/mm | 3500 |
| 4 | Freeze-thaw split retained strength ratio | % | 85 |
| 5 | Infiltration coefficient | mL/min | 2600 |
| 6 | Construction depth | mm | 0.80 |
| 7 | Coefficient of friction BPN20 | — | 55 |
The nominal maximum particle diameter of the small particle open gradation asphalt of the present embodiment is 4.75mm, and pave-load layer thickness is
1.0cm。
Embodiment 2
The small particle open gradation asphalt for ultrathin overlay of the present embodiment, including the gathering materials of 86.5% weight,
The POE composite modified asphalts of the filler of 8% weight and 5.5% weight.It is used to gather materials for the Black Warrior of Jintan Fu Lu Zha Shi factories production
Rock (basalt of 3mm~5mm continuous gradings and the basalt in mass ratio 80 of 0mm~3mm continuous gradings：20 mix)；
Filler used is the limestone mineral powder of Jiangxi elder brother Thailand mineral powder plant production and the P.O of Anhui Conch Cement limited company production
42.5 the mixture of cement, mass ratio 3:1.
It is used gather materials it is as follows with the grading of filler used：
| Screen size (mm) | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Pass through percentage (%) | 100 | 90 | 21 | 11 | 9 | 9 | 9 | 8 |
POE composite modified asphalts used include following components：(Sinopec Zhenghai oil-refining chemical share has No. 30 pitches
Limit company) 100 parts by weight, POE modifying agent (LC565 of LG Corp of South Korea, melt index 5dg/min) 8 parts by weight, polyethylene
Wax (Sasobit of South Africa Sasol companies) 1 parts by weight and Interface enhancer (Qufu morning twilight Chemical Co., Ltd., CG-01741)
1.0 parts by weight.
60 DEG C of zero-shear viscosities of POE composite modified asphalts are 35000Pa.s, and softening point is 94 DEG C.
Main performance testing results such as table 2 for the small particle open gradation asphalt of ultrathin overlay.Wherein, connect
The method of testing reference of voidage《Asphalt paving technical regulation》(CJJ/T 190-2012) appendix A, Superpave mix-design damage
The method of testing reference of mistake《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011) T0733-2011, move
The method of testing reference of stability《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011)T0719-
2011, freeze-thaw split retained strength than method of testing reference《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG
E20-2011) T0729-2000, the method for testing reference of infiltration coefficient《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0971-2008, the method for testing reference of construction depth《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0961-1995, the method for testing reference of coefficient of friction《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008)T 0964-2008。
Table 2 is used for the main performance testing results of the small particle open gradation asphalt of ultrathin overlay
| Sequence number | Technical indicator | Unit | Technical performance |
| 1 | Connectivity gap rate | % volumes | 12.0 |
| 2 | Superpave mix-design loses | % weight | 8.5 |
| 3 | Dynamic stability | Secondary/mm | 3900 |
| 4 | Freeze-thaw split retained strength ratio | % | 87 |
| 5 | Infiltration coefficient | mL/min | 2500 |
| 6 | Construction depth | mm | 0.92 |
| 7 | Coefficient of friction BPN20 | — | 72 |
The nominal maximum particle diameter of the small particle open gradation asphalt of the present embodiment is 4.75mm, and pave-load layer thickness is
1.2cm。
Embodiment 3
The small particle open gradation asphalt for ultrathin overlay of the present embodiment, including the gathering materials of 92.0% weight,
The POE composite modified asphalts of the filler of 2% weight and 6% weight.It is used to gather materials for the brightness of Huzhou troy weight building stones process plants
Greenstone (diabase of 3mm~5mm continuous gradings and the diabase in mass ratio 75 of 0mm~3mm continuous gradings：25 mixing and
Into)；Filler used is limestone mineral powder and the production of Anhui Conch Cement limited company of Jiangxi elder brother Thailand mineral powder plant production
The mixture of the cement of P.O 42.5, mass ratio 2:1.
It is used gather materials it is as follows with the grading of filler used：
| Screen size (mm) | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Pass through percentage (%) | 100 | 99 | 15 | 5 | 5 | 3 | 3 | 2 |
POE composite modified asphalts used include following components：(Sinopec Zhenghai oil-refining chemical share has No. 50 pitches
Limit company) 100 parts by weight, POE modifying agent (LC170 of LG company, melt index 1dg/min) 14 parts by weight, Tissuemat E
(Sasobit of South Africa Sasol companies) 3 parts by weight and Interface enhancer (Jiangsu Chenguang Coincident Dose Co., Ltd., CG-202) 0.3
Parts by weight.
60 DEG C of zero-shear viscosities of POE composite modified asphalts are 42000Pa.s, and softening point is 97 DEG C.
Main performance testing results such as table 3 for the small particle open gradation asphalt of ultrathin overlay.Wherein, connect
The method of testing reference of voidage《Asphalt paving technical regulation》(CJJ/T 190-2012) appendix A, Superpave mix-design damage
The method of testing reference of mistake《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011) T0733-2011, move
The method of testing reference of stability《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011)T0719-
2011, freeze-thaw split retained strength than method of testing reference《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG
E20-2011) T0729-2000, the method for testing reference of infiltration coefficient《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0971-2008, the method for testing reference of construction depth《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0961-1995, the method for testing reference of coefficient of friction《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008)T 0964-2008。
Table 3 is used for the main performance testing results of the small particle open gradation asphalt of ultrathin overlay
| Sequence number | Technical indicator | Unit | Technical performance |
| 1 | Connectivity gap rate | % volumes | 13.5 |
| 2 | Superpave mix-design loses | % weight | 6.4 |
| 3 | Dynamic stability | Secondary/mm | 4700 |
| 4 | Freeze-thaw split retained strength ratio | % | 89 |
| 5 | Infiltration coefficient | mL/min | 2900 |
| 6 | Construction depth | mm | 0.88 |
| 7 | Coefficient of friction BPN20 | — | 68 |
The nominal maximum particle diameter of the small particle open gradation asphalt of the present embodiment is 4.75mm, and pave-load layer thickness is
1.5cm。
Embodiment 4
The small particle open gradation asphalt of the present embodiment, including the gathering materials of 89.0% weight, the filler of 5.0% weight
With the POE composite modified asphalts of 6.0% weight.It is used gather materials for Huzhou troy weight building stones process plants diabase (3mm~
The diabase of 5mm continuous gradings and the diabase in mass ratio 80 of 0mm~3mm continuous gradings：20 mix)；Filler used
The cement of P.O 42.5 of limestone mineral powder and the production of Anhui Conch Cement limited company for the mineral powder plant production of Jiangxi elder brother Thailand
Mixture, mass ratio 1:1.
It is used gather materials it is as follows with the grading of filler used：
| Screen size (mm) | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Pass through percentage (%) | 100 | 95 | 40 | 20 | 12 | 8 | 6 | 5 |
POE composite modified asphalts used include following components：(Sinopec Zhenghai oil-refining chemical share has No. 30 pitches
Limit company) 100 parts by weight, POE modifying agent (LC565 of LG Corp of South Korea, melt index 5dg/min) 10 parts by weight, poly- second
Alkene wax (Sasobit of South Africa Sasol companies) 1 parts by weight and Interface enhancer (Jiangsu Chenguang Coincident Dose Co., Ltd., CG-
302) 0.3 parts by weight.
60 DEG C of zero-shear viscosities of POE composite modified asphalts are 40000Pa.s, and softening point is 94 DEG C.
Main performance testing results such as table 4 for the small particle open gradation asphalt of ultrathin overlay.Wherein, connect
The method of testing reference of voidage《Asphalt paving technical regulation》(CJJ/T 190-2012) appendix A, Superpave mix-design damage
The method of testing reference of mistake《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011) T0733-2011, move
The method of testing reference of stability《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG E20-2011)T0719-
2011, freeze-thaw split retained strength than method of testing reference《Highway engineering pitch and Asphalt Mixture Experiment code》(JTG
E20-2011) T0729-2000, the method for testing reference of infiltration coefficient《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0971-2008, the method for testing reference of construction depth《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008) T 0961-1995, the method for testing reference of coefficient of friction《Highway subgrade road surface on-the-spot test code》(JTG E60-
2008)T 0964-2008。
Table 4 is used for the main performance testing results of the small particle open gradation asphalt of ultrathin overlay
The nominal maximum particle diameter of the small particle open gradation asphalt of the present embodiment is 4.75mm, and pave-load layer thickness is
1.3cm。
Therefore, the present invention has following positive effect：
1st, a kind of new granule for ultrathin overlay is constructed using the main aggregate completion method of formation design of asphalt mixture
Footpath open gradation asphalt, embedded squeezing ability of the coarse aggregate as main aggregate is given full play to, improve the stability of skeleton interlocking；It is logical
Cross the structure of grading so that although asphalt nominal maximum particle diameter is smaller, but still with good antiskid performance and larger
Construction depth, improve road surface running vehicle security.
2nd, by using the POE modifying agent of the weight of 8% weight~14%, be greatly improved pitch softening point and 60 DEG C
Zero-shear viscosity；By adding a certain proportion of silane coupler in polymer modified asphalt, make the organic of silane coupler
Group crosslinks with the organic group in pitch, so as to strengthen the adhesiveness of asphalt and aggregate, improves the wetting capacity of pitch
With structure asphalt membrane thickness, improve the boundary strengths of asphalt and aggregate so that the small particle for ultrathin overlay of exploitation opens level
There is good anti-loss ability of dispersing with asphalt；By adding a certain proportion of poly- second in polymer modified asphalt
Alkene wax, assign the construction workability and rammability good for the small particle open gradation asphalt of ultrathin overlay.
3rd, the small particle open gradation asphalt for ultrathin overlay of the invention have larger connectivity gap rate (>=
12% volume) and higher infiltration coefficient (>=2000mL/min), reduce the danger of " water drift " at a high speed so that table has water on road
Situation, it still is able to maintain tire and the good contact on road surface.Being dabbled caused by rainwater can substantially reduce with water smoke, and visual performance is good
It is good.
4th, the nominal maximum particle diameter of the small particle open gradation asphalt for ultrathin overlay of the invention is 4.75mm,
Pave-load layer thickness is 1.0cm~1.5cm, effectively thinned cover thickness, reduces the construction costs of preventive maintenance.
So as to which the small particle open gradation asphalt for ultrathin overlay of the invention in the gradation design stage by changing
Kind skeleton interlocking stability, the wetting capacity and structure asphalt membrane thickness of pitch are improved by using POE composite modified asphalts, is made
There is asphalt high anti-disperse loss ability, larger connectivity gap rate, high construction depth and to take into account road surface drainage function
The features such as.
In summary, cover can not only be thinned in the small particle open gradation asphalt for ultrathin overlay of the invention
Thickness, reduce construction costs and reduce driving noise, and two grades of hard stones of 3~5mm and 0~3mm can be made full use of, subtract
Light large-scale application SMA road surfaces and cause corresponding building stones superfluous environment and resource pressure, it is ingenious in design, prepare easy, cost
It is low, suitable for large-scale promotion application.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that it can still make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification is considered as illustrative rather than limit
Property processed.
Claims (10)
1. a kind of small particle open gradation asphalt for ultrathin overlay, it is characterised in that including 85% weight~92%
The polymer modified asphalt of the weight of the gathering materials of weight, the filler of the weight of 2% weight~8% and 5.5% weight~7.5%, it is described
The nominal maximum particle diameter of the small particle open gradation asphalt for ultrathin overlay be 4.75mm, described is used for ultra-thin cover
The pave-load layer thickness of the small particle open gradation asphalt in face is 1.0cm~1.5cm.
2. the small particle open gradation asphalt according to claim 1 for ultrathin overlay, it is characterised in that described
Gather materials for basalt or diabase.
3. the small particle open gradation asphalt according to claim 1 for ultrathin overlay, it is characterised in that described
Filler is the mixture of limestone mineral powder and cement, and the mass ratio of the limestone mineral powder and the cement is 1:1~3:1.
4. the small particle open gradation asphalt according to claim 1 for ultrathin overlay, it is characterised in that described
Gathering materials, it is claimed below to meet with the grading limit of the filler：
5. the small particle open gradation asphalt according to claim 1 for ultrathin overlay, it is characterised in that described
Polymer modified asphalt is POE composite modified asphalts, 60 DEG C of zero-shear viscosities of the POE composite modified asphalts >=
30000Pa.s, softening point >=90 DEG C of the POE composite modified asphalts.
6. the small particle open gradation asphalt according to claim 5 for ultrathin overlay, it is characterised in that described
POE composite modified asphalts include hard grades of bitumen, modifying agent, warm-mixing agent and Interface enhancer, and the modifying agent is polyolefin elastic
Body POE, the modifying agent are the weight of 8% weight~14% of the hard grades of bitumen, and the warm-mixing agent is the hard grades of bitumen
The weight of 1% weight~3%；The Interface enhancer for the hard grades of bitumen the weight of 0.3% weight~1.0%.
7. the small particle open gradation asphalt according to claim 6 for ultrathin overlay, it is characterised in that described
The needle penetration of hard grades of bitumen is 20~60 (0.1mm).
8. the small particle open gradation asphalt according to claim 6 for ultrathin overlay, it is characterised in that described
Hard grades of bitumen is No. 30 pitches or No. 50 pitches；The warm-mixing agent is Tissuemat E；The Interface enhancer is silane coupler.
9. the small particle open gradation asphalt according to claim 6 for ultrathin overlay, it is characterised in that described
The melt index of modifying agent is 1dg/min~10dg/min.
10. the small particle open gradation asphalt according to claim 1 for ultrathin overlay, it is characterised in that institute
The volume of the connectivity gap rate for the small particle open gradation asphalt for ultrathin overlay stated >=12%, described being used for are ultra-thin
The Superpave mix-design of the small particle open gradation asphalt of cover loses≤10% weight, and described is used for the small of ultrathin overlay
Dynamic stability >=3500 time/mm of particle diameter open gradation asphalt, the described small particle open gradation for ultrathin overlay drip
Freeze-thaw split retained strength ratio >=85% of blue or green compound, the described small particle open gradation asphalt for ultrathin overlay
Coefficient of friction BPN20>=55, the construction depth of the described small particle open gradation asphalt for ultrathin overlay >=
0.8mm, infiltration coefficient >=2000mL/min of the described small particle open gradation asphalt for ultrathin overlay.
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| CN107892510A (en) * | 2017-11-28 | 2018-04-10 | 广州大学 | A kind of thin overlay asphalt |
| CN108046661A (en) * | 2017-11-27 | 2018-05-18 | 上海市政工程设计研究总院（集团）有限公司 | A kind of ultra-thin pervious asphalt abrasion layer material of high-strength durable |
| CN108726923A (en) * | 2018-06-06 | 2018-11-02 | 长安大学 | A kind of modified carbon fiber enhancing bituminous paving Anti-sliding Material and preparation method thereof |
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| CN112661441A (en) * | 2020-11-23 | 2021-04-16 | 浙江顺畅高等级公路养护有限公司 | Asphalt concrete, preparation method and small-particle-size extremely-thin cover |
| CN114163811A (en) * | 2022-01-07 | 2022-03-11 | 安徽露德新材料科技有限公司 | Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture |
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