CN107892510A - A kind of thin overlay asphalt - Google Patents
A kind of thin overlay asphalt Download PDFInfo
- Publication number
- CN107892510A CN107892510A CN201711220730.2A CN201711220730A CN107892510A CN 107892510 A CN107892510 A CN 107892510A CN 201711220730 A CN201711220730 A CN 201711220730A CN 107892510 A CN107892510 A CN 107892510A
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- China
- Prior art keywords
- building stones
- asphalt
- thin overlay
- particle diameter
- pitch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of thin overlay asphalt, the preparing raw material of following weight percentage is included：Building stones 88.5%~91%, miberal powder 4.5%~5.0%, pitch 5~6% and fiber 0.3~0.5%；The building stones include the building stones that the building stones that particle diameter is 0~3mm and particle diameter are 3~5mm；Weight percentage of the building stones that the particle diameter is 0~3mm in building stones is 23~27%, and weight percentage of the building stones that the particle diameter is 3~5mm in building stones is 73~77%.The type of thin overlay asphalt of the present invention belongs to framework compact type, with more preferable skeleton structure, so that the thin overlay asphalt resistance to deformation rutting resistance of rational proportion is stronger, while there is good construction depth, meet that antiskid requirement is checked and accepted on road surface；There are good high temperature, low temperature, water stability, to effectively preventing that it is positive that road surface early damage from having the function that.
Description
Technical field
The present invention relates to a kind of construction material, and in particular to a kind of thin overlay asphalt.
Background technology
With developing rapidly for highway in China construction, road maintenance mileage is continuously increased, and causes maintenance fund relatively short
Lack, maintenance level is relatively low.Change the situation passively conserved at present, most efficient method is to implement preventive maintenance.Thin layer cover
Face facts have proved it is a kind of technology being worthy to be popularized as a kind of preventive maintenance measure, by foreign countries, and with must
Reliability.
Proved in foreign engineering practice, ultra-thin asphalt concrete layer is as a kind of preventive maintenance measure, with micro- table
Place, which compares, can extend express highway pavement service life at least more than 5 years, compared with traditional thin overlay, superthin layer cover
Compacted depth can be with as little as 10~20mm, so as to reduce road maintenance cost.High performance ultra-thin asphalt concrete layer makes
It is 6~8 years with the life-span.At the same time, the coarse skid resistance for increasing wheel of ultra-thin asphalt concrete layer surface, can
To reduce noise, seepage of water, rainy day common water smoke can be greatly reduced, improve visibility.Although finishing coat only has 10~
20mm is thick, but can be combined closely with original road surface, elapse disease, and this has larger practical value to energy-saving.Therefore, push away
Extensively there is good economic benefit and environmental benefit using application of the ultrathin overlay in preventive maintenance, be worthy of popularization.
Ultra-thin asphalt concrete layer possesses preferable construction depth and antiskid performance firmly.From asphalt mixture design in theory
For, asphalt should use the higher mineral aggregate gradation composition of stone contents, to meet the needs of pavement skid resistance condition.Due to
Ultra-thin asphalt concrete thickness degree only has 10~20mm, and most of nominal particle diameter to gather materials is less than 9.5mm.For nominal grain
The asphalt of footpath very little will meet road antiskid performance as superficial layer, while also need to meet that low-temperature cracking-resistance, high temperature are steady
Every pavement performances such as qualitative and water stability, its aggregate grading composition and mixture ratio of asphalt concrete are all key issues.
The content of the invention
A kind of thin overlay pitch is provided and mixed it is an object of the invention to overcome the shortcomings of the prior art part
Close material.
To achieve the above object, the technical scheme taken of the present invention is：A kind of thin overlay asphalt, comprising with
The preparing raw material of lower weight percentage：Building stones 88.5%~91%, miberal powder 4.5%~5.0%, pitch 5~6% and fiber
0.3~0.5%；The building stones include the building stones that the building stones that particle diameter is 0~3mm and particle diameter are 3~5mm；The particle diameter be 0~
Weight percentage of the 3mm building stones in building stones is 23~27%, and the particle diameter is weight of the 3~5mm building stones in building stones
It is 73~77% to measure percentage composition.
The marshall compaction test specimen voidage VV of above-mentioned asphalt be 4~8%, stability ＞ 6kN, flow valuve be 20~
50×10-1Mm, wheel tracking test dynamic stability 3500 times/mm of ＞, >=2000 μ ε of bending failure strain in low-temperature bending test,
Soaked Marshall residual stability ＞ 85%, and freeze-thaw split intensity is rubbed than the construction depth ＞ 0.55mm of ＞ 80%, portable pendulum tester measure
Wipe pendulum value (BPN) >=45 in ratio test.
Building stones are divided into two grades of 0~3mm and 3~5mm by particle diameter used in thin overlay asphalt of the present invention, are
Guarantee compacted depth, the bigger building stones of particle diameter not can be selected herein.Two grades of building stones of wherein 0~3mm and 3~5mm are matched somebody with somebody as above-mentioned
Asphalt than that can ensure formed has framework dense structure, greatly improves rutting resistance and the antiskid of compound
Effect, comfortably provide safeguard for traffic safety, the target without overhaul within road surface 5 years can be realized.
As the preferred embodiment of thin overlay asphalt of the present invention, the building stones are diabase, flower
At least one of Gang Yan and limestone.
As the preferred embodiment of thin overlay asphalt of the present invention, the pitch drips for high adhered modification
It is blue or green.
Pitch of the present invention is high adhered modification pitch, and the present invention is from high adhered modification pitch without from plain asphalt
Reason is that high-viscosity asphalt can improve the water stabilizing of asphalt so that asphalt is under the conditions of rugged environment
Can preferably it use.
As the preferred embodiment of thin overlay asphalt of the present invention, the miberal powder is limestone deposit
Powder.
Limestone mineral powder and the asphalt mastic of high-viscosity asphalt composition make building stones form entirety and provide high-strength cohesive strength
It is crucial.
As the preferred embodiment of thin overlay asphalt of the present invention, the fiber is polyester fiber.
As the preferred embodiment of thin overlay asphalt of the present invention, it is 0 that the building stones, which include particle diameter,
~3mm building stones and particle diameter are 3~5mm building stones；The particle diameter is weight percentage of the 0~3mm building stones in building stones
For 23~27%, weight percentage of the building stones that the particle diameter is 3~5mm in building stones is 73~77%；The building stones are
At least one of diabase, granite and limestone；The pitch is high adhered modification pitch；The miberal powder is limestone deposit
Powder；The fiber is polyester fiber.
Thin overlay asphalt of the present invention is prepared with excellent high-temperature stability, fatigue durability
The pavement performances such as energy, crack resistance at low-temperature and water stability.
As the preferred embodiment of thin overlay asphalt of the present invention, the thin overlay pitch mixes
The bitumen aggregate ratio for closing material is 5~6%.
Bitumen aggregate ratio is the quality and building stones and the ratio of the quality sum of miberal powder, the quality and oilstone of compound of pitch used
Than having compared with Important Relations.The performance mark of the present invention can be met using the performance of the thin overlay asphalt of above-mentioned bitumen aggregate ratio
Standard, and with pavement performances such as good high-temperature behavior, crack resistance at low-temperature, water stabilizing, antiskid performances, to effectively preventing
Road surface early damage has the function that positive.
Another object of the present invention is to provide a kind of preparation method of the thin overlay asphalt, comprising with
Lower step：
(1) building stones, miberal powder and pitch, are heated into 3~4h under the conditions of 180~190 DEG C respectively；
(2), building stones are well mixed with pitch, miberal powder is added and fiber is well mixed, produce the thin overlay
Asphalt.
The beneficial effects of the present invention are：The invention provides a kind of thin overlay asphalt.It is of the present invention
The type of thin overlay asphalt belongs to framework compact type, has more preferable skeleton structure so that rational proportion
Thin overlay asphalt resistance to deformation rutting resistance is stronger, while has good construction depth, meets that road surface is checked and accepted
Antiskid requirement；There are good high temperature, low temperature, water stability, to effectively preventing that it is positive that road surface early damage from having the function that.Using
The mix type of nominal maximum aggregate size smaller (4.75mm), allow ultra-thin asphalt mixes overlay thickness be as thin as 10~
20mm, can make while road maintenance requirement is met the cost of thin overlay relative to traditional thin overlay is lower, construction more
Add convenient and swift, shorten the compacting time that paves, open to traffic that can be earlier.
Embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Embodiment 1
A kind of embodiment of thin overlay asphalt of the present invention, thin overlay pitch described in the present embodiment
Component of the salt and spice containing following weight percentage：Building stones 89.4%, miberal powder 4.7%, pitch 5.5% and fiber 0.4%；
The building stones are diabase；The building stones include the building stones that the building stones that particle diameter is 0~3mm and particle diameter are 3~5mm；
Weight percentage of the building stones that the particle diameter is 0~3mm in building stones is 26%, and the particle diameter is 3~5mm building stones in stone
Weight percentage in material is 74%.
The pitch is that shell PG-76 levels are modified high-viscosity asphalt；Miberal powder is limestone mineral powder；Fiber is polyester fiber.
Formate gradation composition refers to building stones and miberal powder be added together by the percent of pass of correspondingly-sized sieve aperture, formate gradation composition be compared with
A kind of more professional method for expressing of weight/mass percentage composition.The formate gradation composition of thin overlay asphalt described in the present embodiment
It is shown in Table 1.
The formate gradation composition of table 1 forms table
High-viscosity asphalt, building stones and miberal powder is separated in setting 3~4h in the baking oven that temperature is 180 DEG C by matching, treat
High-viscosity asphalt dries chemical conversion liquid, building stones miberal powder opens blender capable of controlling temperature after drying completely to design temperature, and it is 180 DEG C to set temperature,
The building stones that are baked and asphalt mixing 90s are poured into, then pours into miberal powder and fiber is stirred well to complete fusion, obtains asphalt.
Thin overlay asphalt described in the present embodiment is subjected to tests below.
(1) Marshall compaction test
According to the grading, by JTG E20-2011《Highway engineering pitch and Asphalt Mixture Experiment code》Shaping horse has a rest
That test specimen, shaping are stripped one day after, determine bulk density, voidage, stability, flow valuve is as shown in table 2, and indices accord with
Close technical requirements.
The Marshall compaction test result of table 2
(2) wheel tracking test
Wheel tracking test is to evaluate the most effective feasible method of High Temperature Stability of Asphalt Mixture.Using《Pitch and pitch
Test mixture code》T0703-2011 method shaping rut plate, determines its dynamic stability, test result table 3, is as a result higher than
Technical requirements.
The wheel tracking test test result of table 3
(3) girder bend test
According to《Pitch and Asphalt Mixture Experiment code》T0709-2011 requirement has carried out 6 groups of -10 DEG C of low temperature girders
Bend test, as a result average value be shown in Table 4, it is clear that the failure strain of asphalt described in the present embodiment is higher than technical requirements.
The girder bend test test result of table 4
(4) water stability is tested
The Moisture Damage of bituminous paving is a big part of highway distress, is used《Pitch and Asphalt Mixture Experiment rule
Journey》T0709-2011 method hits real shaping Marshall cylinder test specimen, passes through immersion Marshall test and indirect tensile test on frozen-thaw
Its residual stability value is determined, to evaluate the water stability of asphalt.Result of the test as shown in table 5 and table 6, its result
Meet technical requirements.
The immersion Marshall test result of table 5
The indirect tensile test on frozen-thaw result of table 6
(5) antiskid performance
The antiskid of a bituminous paving index essential as acceptance criteria, it is advantageous to the safety of driving, uses
《Pitch and Asphalt Mixture Experiment code》T0731-2000 sands method and determines its construction depth, uses《Highway subgrade road surface shows
Field test procedure》T0964-2008 portable pendulum testers determine the method for its pendulum value to characterize antiskid performance.Result of the test such as table 7 and table 8
Shown, its result meets technical requirements.
The construction depth result of the test of table 7
The portable pendulum tester of table 8 determines Test of Friction result
Embodiment 2
A kind of embodiment of thin overlay asphalt of the present invention, thin overlay pitch described in the present embodiment
Component of the salt and spice containing following weight percentage：Building stones 90.02%, miberal powder 4.5%, pitch 5.1% and fiber 0.38%；
The building stones are granite；The building stones include the building stones that the building stones that particle diameter is 0~3mm and particle diameter are 3~5mm；
Weight percentage of the building stones that the particle diameter is 0~3mm in building stones is 24%, and the particle diameter is 3~5mm building stones in stone
Weight percentage in material is 76%.
The pitch is that shell HV is modified high-viscosity asphalt；Miberal powder is limestone mineral powder；Fiber is polyester fiber.
The formate gradation composition of thin overlay asphalt is shown in Table 9 described in the present embodiment.
The formate gradation composition of table 9 forms table
After above-mentioned material configures in proportion, by high-viscosity asphalt, building stones, miberal powder it is separated in setting temperature be 180
DEG C baking oven in 3~4h.Dried after high-viscosity asphalt after chemical conversion liquid, building stones miberal powder dry to design temperature completely and open temperature control stirring
Machine, it is 180 DEG C to set temperature.The building stones that are baked and asphalt mixing 90s are poured into, then pours into miberal powder and fiber is stirred well to completely
Fusion, obtains asphalt.
Thin overlay asphalt described in the present embodiment is subjected to tests below.
(1) Marshall compaction test
According to the grading, by JTG E20-2011《Highway engineering pitch and Asphalt Mixture Experiment code》Shaping horse has a rest
That test specimen, shaping are stripped one day after, determine bulk density, voidage, stability, flow valuve is as shown in table 10, and indices are equal
Meet technical requirements.
The Marshall compaction test result of table 10
(2) wheel tracking test
Wheel tracking test is to evaluate the most effective feasible method of High Temperature Stability of Asphalt Mixture.Using《Pitch and pitch
Test mixture code》T0703-2011 method shaping rut plate, determines its dynamic stability, test result is shown in Table 11, as a result
Higher than technical requirements.
The wheel tracking test result of table 11
(3) girder bend test
According to《Pitch and Asphalt Mixture Experiment code》T0709-2011 requirement has carried out 6 groups of -10 DEG C of low temperature girders
Bend test, as a result average value be shown in Table 12, it is clear that the failure strain of asphalt described in the present embodiment is higher than technical requirements.
The girder bend test result of table 12
(4) water stability is tested
The Moisture Damage of bituminous paving is a big part of highway distress, is used《Pitch and Asphalt Mixture Experiment rule
Journey》T0709-2011 method hits real shaping Marshall cylinder test specimen, passes through immersion Marshall test and indirect tensile test on frozen-thaw
Its residual stability value is determined, to evaluate the water stability of asphalt.Result of the test is as shown in table 13 and table 14.It is tied
Fruit meets technical requirements.
The immersion Marshall test of table 13
The indirect tensile test on frozen-thaw of table 14
(5) antiskid performance
The antiskid of a bituminous paving index essential as acceptance criteria, it is advantageous to the safety of driving, uses
《Pitch and Asphalt Mixture Experiment code》T0731-2000 sands method and determines its construction depth, uses《Highway subgrade road surface shows
Field test procedure》T0964-2008 portable pendulum testers determine the method for its pendulum value to characterize antiskid performance.Result of the test such as table 15 and table
Shown in 16, its result meets technical requirements.
The construction depth of table 15 is tested
The portable pendulum tester of table 16 determines Test of Friction
The checking of each pavement performance more than, it can be deduced that, it is ultra-thin when using this grading and bitumen aggregate ratio as 5~6%
The performance of finishing coat asphalt meets the performance standard of the present invention, and with good high-temperature behavior, crack resistance at low-temperature,
The pavement performances such as water stabilizing, antiskid performance, to effectively preventing that it is positive that road surface early damage from having the function that.Using most grand duke
Claim the mix type of particle diameter smaller (4.75mm), ultra-thin asphalt mixes overlay thickness is as thin as 10~20mm,
The cost for meeting that thin overlay can be made while road maintenance requirement is relative to traditional thin overlay is lower, constructing more facilitates soon
Victory, shorten the compacting time that paves, open to traffic that can be earlier.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of scope is protected, although being explained in detail with reference to preferred embodiment to the present invention, one of ordinary skill in the art should
Understand, technical scheme can be modified or equivalent substitution, without departing from the essence of technical solution of the present invention
And scope.
Claims (7)
1. a kind of thin overlay asphalt, it is characterised in that include the preparing raw material of following weight percentage：Building stones
88.5%~91%, miberal powder 4.5%~5.0%, pitch 5~6% and fiber 0.3~0.5%；
The building stones include the building stones that the building stones that particle diameter is 0~3mm and particle diameter are 3~5mm；The particle diameter is 0~3mm building stones
Weight percentage in building stones is 23~27%, and the particle diameter is weight percentage of the 3~5mm building stones in building stones
For 73~77%.
2. thin overlay asphalt as claimed in claim 1, it is characterised in that the building stones are diabase, granite
At least one of with limestone.
3. thin overlay asphalt as claimed in claim 1, it is characterised in that the pitch is high adhered modification pitch.
4. thin overlay asphalt as claimed in claim 4, it is characterised in that the miberal powder is limestone mineral powder.
5. thin overlay asphalt as claimed in claim 1, it is characterised in that the fiber is polyester fiber.
6. thin overlay asphalt as claimed in claim 1, it is characterised in that the thin overlay asphalt
Bitumen aggregate ratio be 5~6%.
7. a kind of preparation method of the thin overlay asphalt as any one of claim 1~6, its feature exist
In comprising the steps of：
(1) building stones, miberal powder and pitch, are heated into 3~4h under the conditions of 180~190 DEG C respectively；
(2), building stones are well mixed with pitch, miberal powder is added and fiber is well mixed, produce the thin overlay pitch
Compound.
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| CN201711220730.2A CN107892510A (en) | 2017-11-28 | 2017-11-28 | A kind of thin overlay asphalt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711220730.2A CN107892510A (en) | 2017-11-28 | 2017-11-28 | A kind of thin overlay asphalt |
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| CN107892510A true CN107892510A (en) | 2018-04-10 |
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ID=61806493
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611944A (en) * | 2018-05-10 | 2018-10-02 | 河海大学 | A kind of Multifunctional permeable water-bound road surface |
| CN118271030A (en) * | 2024-02-22 | 2024-07-02 | 北京中交路通科技发展有限公司 | Graphene super-viscous asphalt mixture and preparation method and overlay construction process thereof |
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| KR100597706B1 (en) * | 2006-04-21 | 2006-07-05 | 송갑용 | Aspalt-concrete compositions comprising waste of stone industry and their method |
| CN107151108A (en) * | 2016-03-04 | 2017-09-12 | 上海龙孚材料技术有限公司 | A kind of ultra-thin asphalt mixes and preparation method thereof, application |
| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
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2017
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| KR100597706B1 (en) * | 2006-04-21 | 2006-07-05 | 송갑용 | Aspalt-concrete compositions comprising waste of stone industry and their method |
| CN107151108A (en) * | 2016-03-04 | 2017-09-12 | 上海龙孚材料技术有限公司 | A kind of ultra-thin asphalt mixes and preparation method thereof, application |
| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611944A (en) * | 2018-05-10 | 2018-10-02 | 河海大学 | A kind of Multifunctional permeable water-bound road surface |
| CN118271030A (en) * | 2024-02-22 | 2024-07-02 | 北京中交路通科技发展有限公司 | Graphene super-viscous asphalt mixture and preparation method and overlay construction process thereof |
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Application publication date: 20180410 |