CN1936186A - Water-permeating pitch mixed material and production method - Google Patents
Water-permeating pitch mixed material and production method Download PDFInfo
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- CN1936186A CN1936186A CN 200610117208 CN200610117208A CN1936186A CN 1936186 A CN1936186 A CN 1936186A CN 200610117208 CN200610117208 CN 200610117208 CN 200610117208 A CN200610117208 A CN 200610117208A CN 1936186 A CN1936186 A CN 1936186A
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Abstract
The invention relates to water infiltrating bituminous mixture that includes aggregate, filling, and additive. The maximum diameter of aggregate is 13.2mm. The mass percent is 0-6% that diameters below 0.075, 6-12% that diameters at 0.075-2.36mm, 6-10% that diameters at 2.36-4.75mm, 48-58% that diameters at 4.75-9.5mm, 20-30% that diameters at 0.5-13.2mm and 0-10% that diameters at 13.2-16mm. Under the condition of knocking 65 times to double sided, the void ratio is 19-24%, and leakage analysis losing is less than 0.3%. The invention has big void ratio that average reaches 20.8%. The water infiltrating ability is better than existing material.
Description
Technical field
The present invention relates to a kind of pavement of road constructional materials, particularly a kind of water-permeating pitch mixed material and manufacture method thereof.
Background technology
Water-permeating pitch mixed material often is called porosity bituminous mixture (PA) or drainage asphalt mixture in Europe.Take away the prefix of grating asphalt wearing layer (Open-Graded Asphalt FrictionCourse) in the U.S., abbreviate OGFC as.
The pervious asphalt road surface is meant generally that surface one to two aspect layer material adopts that void content is big, draining open gradation bituminous mixture rapidly.The coarse aggregate that this compound uses is more, thereby void content is very big, usually more than 15%, can drain the rainwater that drops to road surface rapidly.The road surface of being built shows good performance in the rainy day: the road surface is ponding not, can not occur the water that ponding causes during driving and float smooth phenomenon, and the recognition capability of the graticule of driving a vehicle night in rainy season simultaneously significantly increases; Rough surface, texture is dark, and cling property improves; The bigger texture in surface also plays the effect that reduces the driving noise.
It is gathering materials of 13.2mm that city asphalt roads surface course adopts maximum nominal size usually, and following table is classified the grating that existing China, Japan and Highway Administration of the United States Federal (FHWA) require as.
| Country | Mass percent by following sieve aperture (mm) | |||||||||
| 16.0 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 | |
| China | 100 | 90-100 | 60-80 | 12-30 | 10-22 | 6-18 | 4-15 | 3-12 | 3-8 | 2-6 |
| Japan | 100 | 95-100 | 10-30 | 8-25 | 5-17 | 4-14 | 3-10 | 2-7 | ||
| FHWA | 100 | 95-100 | 30-50 | 5-15 | 2-5 | |||||
Grating according to last table, the bituminous mixture that existing OGFC (OGFC) is made, hit on the marshal piece two sides under real 50 times the condition, the void content that records is at 18-25%, and all the other indexs also comprise Marshall stability, leakage analysis losing, Kent fort disperse loss and dynamic stability etc.But by discovering that void content is 18% o'clock a water-permeating pitch mixed material material, maximum value appears in its non-connected void rate, is unfavorable for that material brings into play its water permeability.And the water-permeating pitch mixed material of making according to existing technical standard can not guarantee the durability in the long-term use.
Summary of the invention
The object of the present invention is to provide a kind of water-permeating pitch mixed material, thereby it is low excessively to solve existing water-permeating pitch mixed material void content, is unfavorable for material performance water permeability, and the long-term insecure problem of useful life longevity.
For reaching above-mentioned purpose, technical scheme of the present invention provides a kind of manufacture method of water-permeating pitch mixed material, this water-permeating pitch mixed material comprises and gathering materials, asphalt binder, filler and additive, described manufacture method comprises choosing according to the level mixing ratio and gathers materials, according to the grating estimation asphalt content that gathers materials, make the marshal piece of compound, the technical indicator of test marshal piece, if undesirable asphalt content or the additive of then changing is until meeting technical requirements, the nominal maximum aggregate size that wherein gathers materials is 13.2mm, mass percents at different levels are respectively: particle diameter is less than the 0-6% that accounts for of 0.075mm, 0.075-2.36mm between account for 6-12%, account for 6-10% between the 2.36-4.75mm, account for 48-58% between the 4.75-9.5mm, 9.5-13.2mm between account for 20-30%, 13.2-16mm accounts for 0-10%.
The manufacture method of above-mentioned water-permeating pitch mixed material, wherein hit under real 65 times the condition two-sided, the measured void content of marshal piece is 19-24%, and leakage analysis losing is not more than 0.3%, Superpave mix-design is not more than 20%, and the Superpave mix-design after the long-term ageing is not more than 30%.
The water-permeating pitch mixed material of water-permeating pitch mixed material of the present invention and existing national grating is compared the back discovery, and two kinds of materials have identical fatigue behaviour, and its durability is equally matched.But the void content of material of the present invention is bigger, and average void fraction is 20.8%, and under the equal height, the average void fraction of national grating is 18.2%, therefore says that from water permeable ability the present invention has more advantage.
The specific embodiment
The present invention is a kind of water-permeating pitch mixed material, mainly comprises asphalt binder, gathers materials, filler and additive, wherein gathers materials and can comprise coarse aggregate, fine aggregate.
Coarse aggregate can adopt harder building stones, for example the rolling building stones that form such as basalt, granite, diabase, tuff, andesite.Coarse aggregate is answered cleaning, drying, rough surface, intensity height, corner angle are good, faller gill shape content is few, do not contain the weathering particle.Should select the rubble of impact breaker fragmentation for use, the ratio with 2 above planes of disruption should be greater than 90%.
The technical requirements of coarse aggregate sees Table 1.
The technical requirements of table 1 coarse aggregate
| Index | Unit | Speedway and Class I highway | Other standard highways | |
| Surface course | Other levels | |||
| The building stones crush values is not more than | ％ | 26 | 28 | 30 |
| Los Angeles abrasion loss is not more than | ％ | 28 | 30 | 35 |
| Apparent relative density is not less than | t/m 3 | 2.60 | 2.50 | 2.45 |
| Water absorption rate is not more than | ％ | 2.0 | 3.0 | 3.0 |
| Soundness is not more than | ％ | 12 | 12 | - |
| Faller gill shape granule content (compound) is not more than wherein particle diameter and is not more than wherein greater than 9.5mm that particle diameter is not more than less than 9.5mm | ％ | 10 8 12 | 18 15 20 | 20 - - |
| WATER-WASHING METHOD＜0.075mm granule content is not more than | ％ | 1 | 1 | 1 |
| Soft rock content is not more than | ％ | 3 | 5 | 5 |
The adhesiveness of polishing value, coarse aggregate and the pitch of the polishing value coarse aggregate of coarse aggregate requires to see Table 2.
The adhesiveness technical requirements of polishing value, coarse aggregate and the pitch of table 2 coarse aggregate
| The rainfall climatic province | 1 (moist district) | 2 (humid regions) | 3 (half-dried districts) | 4 (arid biogeographic zones) |
| Annual rainfall (mm) | ＞1000 | 1000～500 | 500～250 | ＜250 |
| The polishing value PSV of coarse aggregate is not less than speedway, Class I highway surface course | 42 | 40 | 38 | 36 |
| The adhesiveness of coarse aggregate and pitch is not less than the at all levels of other levels of speedway, Class I highway surface course speedway, Class I highway and other standard highways | 5 4 | 4 4 | 4 3 | 3 3 |
Fine aggregate is answered cleaning, drying, no weathering, free from admixture, and suitable grain composition is arranged, and its quality and specification should meet the regulation of table 3.Can adopt building stones such as basalt, granite, diabase, tuff, andesite.
Table 3 fine aggregate quality requirement
| Project | Unit | Speedway, Class I highway | Other standard highways |
| Apparent relative density is not less than | t/m 3 | 2.5 | 2.45 |
| Soundness (＞0.3mm part) is not less than | ％ | 12 | - |
| Mud content (less than the content of 0.075mm) is not more than | ％ | 3 | 5 |
| The sand equivalent is not less than | ％ | 60 | 50 |
| Methylene blue number is not more than | g/kg | 25 | - |
| Corner angle are not less than | s | 30 | - |
Filler is selected the breeze of limestone processing for use.Breeze should be dry, clean, and every 50t checks once, and its quality should meet the requirement of table 4.The dust that lorry mounted mixer reclaims must not be used as breeze.
The requirement of table 4 breeze
| Apparent density | Water content | Hydrophilic coefficient | Particle size range | Outward appearance | ||
| ＜0.6mm | ＜0.15mm | ＜0.075mm | ||||
| ≥2.5g/cm 3 | ≤1％ | ＜0.9 | 100％ | 90-100％ | 85-100％ | There is not a caking |
Binder is selected for use according to the expectation function of environment, traffic and water-permeating pitch mixed material.Hot climate or have freeze thawing circulation cold climate, mediumly adopt the high stiffness binder that needle penetration is lower, softening point is higher, for example the SBS modified asphalt binders of performance classification PG76-XX or high-viscosity asphalt compound to the suggestion of heavy traffic condition.The index of 70# modified asphalt binders is referring to table 5.
Table 5 70# modified asphalt technology index
| Project | Technical requirements |
| Needle penetration (100g, 5s, 25 ℃)/0.1mm | 50～70 |
| PI | -0.2～1.0 |
| Softening point (ring and ball method)/℃ | ＞75 |
| Ductility (5cm/min, 5 ℃)/cm | ＞30 |
| Brookfield viscosity (135 ℃)/Pas | ＜3 |
| Flash-point/℃ | ＞230 |
| Isolation test (softening point is poor)/℃ | ＜2.5 |
| Elasticity is recovered (25 ℃)/% | ＞70 |
| Kinematic viscosity (135 ℃)/Pas | ＜3 |
| Relative density (25 ℃ of water) | / |
| Mass loss/% | ＜0.6 |
| Ductility (5cm/min, 5 ℃)/cm | ＞20 |
| Penetration ratio (25 ℃)/% | ＞65 |
Generally need to add fiber, lignin fibre, mineral fibers or polyester fiber all can, the consumption of fiber is 0.3～0.5% of a compound weight.The consumption of lignin fibre and polyester fiber is 0.3% of a compound weight, and mineral fibers is generally 0.4%.Under 250 ℃ temperature fiber should never degenerate, embrittlement not.Use the necessary compliance with environmental protection requirements of fiber, do not endanger healthy.Fiber must mix and stir in the process and can fully be uniformly dispersed at compound.
Various quality of fiber should meet the technical requirements of table 6.
The technical requirements of table 6 fiber quality
| Project | Unit | Index | Test method |
| Fibre length is not more than | mm | 6 | Aqueous solution microscopic |
| Content of ashes | ％ | 18±5 | Measure residue after 590 ℃～600 ℃ burnings of high temperature |
| PH value | 7.5±1.0 | The aqueous solution is fixed with PH test paper or PH instrumentation | |
| Oil absorbency is not less than * | 5 times of fiber quality | Be placed on after soaking with kerosene sieve go up strike through shaking after weighing | |
| Moisture content (in mass) is not more than | ％ | 5 | Cool off weighing behind 105 ℃ of baking oven baking 2h |
*Only lignin fibre is done this requirement
For the water-permeating pitch mixed material of the nominal maximum aggregate size 13.2mm that gathers materials, the present invention adopts the grating listed as following table.
Table 7 water-permeating pitch mixed material grading limit
According to the grating of last table as can be known, in the gathering materials of nominal maximum aggregate size 13.2mm, mass percents at different levels are respectively: particle diameter is less than the 0-6% that accounts for of 0.075mm, 0.075-2.36mm between account for 6-12%, 2.36-4.75mm between account for 6-10%, 4.75-9.5mm between account for 48-58%, account for 20-30% between the 9.5-13.2mm, 13.2-16mm accounts for 0-10%.
Embodiment 1: particle diameter is 0 less than 0.075mm's, accounts for 11% between the 0.075-2.36mm, accounts for 10% between the 2.36-4.75mm, accounts for 49% between the 4.75-9.5mm, accounts for 26% between the 9.5-13.2mm, and 13.2-16mm accounts for 4%.
Embodiment 2: particle diameter is 6% less than 0.075mm's, is 7% between the 0.075-2.36mm, accounts for 8% between the 2.36-4.75mm, accounts for 58% between the 4.75-9.5mm, accounts for 20% between the 9.5-13.2mm, and 13.2-16mm's is 1%.
Embodiment 3: particle diameter is 3% less than 0.075mm's, accounts for 12% between the 0.075-2.36mm, accounts for 6% between the 2.36-4.75mm, accounts for 48% between the 4.75-9.5mm, accounts for 30% between the 9.5-13.2mm, and 13.2-16mm accounts for 1%.
Embodiment 4: particle diameter is 6% less than 0.075mm's, accounts for 8% between the 0.075-2.36mm, and between the 2.36-4.75mm is 6%, accounts for 51% between the 4.75-9.5mm, accounts for 25% between the 9.5-13.2mm, and 13.2-16mm's is 4%.
Embodiment 5: particle diameter is 3% less than 0.075mm's, and accounting between the 0.075-2.36mm accounts for 10% between 8%, 2.3 6-4.75mm, accounts for 48% between the 4.75-9.5mm, accounts for 26% between the 9.5-13.2mm, and 13.2-16mm accounts for 5%.
Embodiment 6: particle diameter is 3% less than 0.075mm's, accounts for 7% between the 0.075-2.36mm, accounts for 7% between the 2.36-4.75mm, accounts for 53% between the 4.75-9.5mm, accounts for 25% between the 9.5-13.2mm, and 13.2-16mm accounts for 5%.
Grating should be got intermediate value or lower limit as far as possible.Can adjust the percent of pass of 2.36mm and following sieve aperture, the percent of pass of the above sieve aperture of 2.36mm is preferably near intermediate value, to guarantee to possess enough void contents.
Best asphalt content is determined according to the following step.
Elder generation is asphalt content P according to a preliminary estimate
b, P
bCan calculate according to following formula:
P
b＝h×A
Wherein h is the thickness of asphalt membrane, and A is the total surface area of gathering materials, and it is calculated as follows:
A＝(2+0.02a+0.04b+0.08c+0.14d+0.3e+0.6f+1.6g)/48.74
Wherein a, b, c, d, e, f, g represent the percentage that passes through of 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm sieve aperture respectively.
Asphalt content P according to estimation
b, P
b+ 0.4%, P
b+ 0.8% three asphalt content is made marshal piece, and the real number of times that hits of marshal piece is two-sided 65 times.The void content of test specimen is measured with volumetric method, and the theoretical maximum relative density adopts computing method.The design formulas of maximum theory density is as follows:
In the formula: γ
SeEffective relative density of-mineral aggregate,
P
aThe bitumen aggregate ratio of-bituminous mixture, (%);
γ
aThe apparent relative density of-asphalt binder;
P
x-fiber consumption is with the percentage replacement of bituminous mixture total amount, (%);
γ
xThe density of-fiber stabilizer is provided or is obtained by picknometer actual measurement by the supplier.
Carry out Xie Lunbao earlier and analyse Lou test and the Kent fort test Marshall Test that disperses.According to the result of dispersing (Superpave mix-design is no more than 20%) with analyse drain junction fruit (the maximum drippage of permission be no more than compound gross weight 0.3%),, determine the scope of best asphalt content in conjunction with the asphalt content of estimation.Therefrom choose consumption than pitch estimator consumption high 0.2%～0.4% as best asphalt content.
According to the best asphalt content of determining, the anti-ability of dispersing after the long-term ageing of check water-permeating pitch mixed material requires the loss of dispersing of Kent fort after the long-term ageing to be not more than 30%.If after the long-term ageing disperse the result with unaged before to compare increasing degree bigger, for example greater than 80%, then best asphalt content is raised in suggestion slightly actual production the time.
The technical requirements of water-permeating pitch mixed material is as shown in table 8
The technical requirements of table 8 water-permeating pitch mixed material
| Pilot project | Unit | Technical requirements |
| The marshal piece size | mm | _101.6mm×63.5mm |
| Marshal piece hits real number of times | The two sides is hit real 65 times | |
| Void content | ％ | 19～24 |
| Marshall stability is not less than | kN | 3.5 |
| Leakage analysis losing is not more than | ％ | 0.3 |
| The Kent fort disperses to lose and is not more than | ％ | 20 |
| Kent fort after the long-term ageing disperses to lose and is not more than | ％ | 30 |
| Dynamic stability is not less than | Inferior/mm | 3000 (heavy traffic flow highway sections), 1500 (general traffic highway sections) |
If any asphalt content does not satisfy all 4 standards---Superpave mix-designs after void content, leakage analysis losing, Superpave mix-design and the long-term ageing, then need to adopt remedial measures.The void content of binder content control compound if the space is very few, then reduces asphalt content.The Superpave mix-design of unaged test specimen surpasses 20%, then needs to increase asphalt content.The Superpave mix-design of aging test specimen surpasses 30%, can increase the type of asphalt content or change binder additive.If leakage analysis losing greater than 0.3%, is then adjusted the consumption and/or the additive of binder.
According to above explanation as can be known, water-permeating pitch mixed material manufacturing process of the present invention mainly is: choose according to the level mixing ratio earlier and gather materials, according to the grating estimation asphalt content that gathers materials, make the marshal piece of compound, the technical indicator of test marshal piece is if undesirable asphalt content or the additive of then changing is until meeting technical requirements.
More than explanation and description only are the embodiments that adopts for those skilled in the art can understand the present invention better, protection scope of the present invention are not construed as limiting.Under the situation that does not break away from claim scope required for protection, the present invention can carry out any correction and change.
Claims (10)
1. water-permeating pitch mixed material, it comprises and gathering materials, asphalt binder, filler and additive, it is characterized in that the nominal maximum aggregate size that gathers materials is 13.2mm, mass percents at different levels are respectively: particle diameter is less than the 0-6% that accounts for of 0.075mm, 0.075-2.36mm between account for 6-12%, account for 6-10% between the 2.36-4.75mm, account for 48-58% between the 4.75-9.5mm, 9.5-13.2mm between account for 20-30%, 13.2-16mm accounts for 0-10%.
2. water-permeating pitch mixed material as claimed in claim 1 is characterized in that, hits under real 65 times the condition two-sided, and the void content that the marshal piece that this compound is made records is 19-24%.
3. water-permeating pitch mixed material as claimed in claim 1 is characterized in that, hits under real 65 times the condition two-sided, and the leakage analysis losing that the marshal piece that this compound is made records is not more than 0.3%.
4. water-permeating pitch mixed material as claimed in claim 1 is characterized in that, hits under real 65 times the condition two-sided, and the Superpave mix-design that the marshal piece that this compound is made records is not more than 20%.
5. water-permeating pitch mixed material as claimed in claim 1 is characterized in that, hits under real 65 times the condition two-sided, and the Superpave mix-design after the long-term ageing that the marshal piece that this compound is made records is not more than 30%.
6. the manufacture method of a water-permeating pitch mixed material, this water-permeating pitch mixed material comprises and gathering materials, asphalt binder, filler and additive, described manufacture method comprises choosing according to the level mixing ratio and gathers materials, according to the grating estimation asphalt content that gathers materials, make the marshal piece of compound, the technical indicator of test marshal piece, if undesirable asphalt content or the additive of then changing is characterized in that until meeting technical requirements:
The nominal maximum aggregate size that gathers materials is 13.2mm, mass percents at different levels are respectively: particle diameter is less than the 0-6% that accounts for of 0.075mm, 0.075-2.36mm between account for 6-12%, 2.36-4.75mm between account for 6-10%, 4.75-9.5mm between account for 48-58%, 9.5-13.2mm between account for 20-30%, 13.2-16mm accounts for 0-10%.
7. as the manufacture method of water-permeating pitch mixed material as described in the claim 6, it is characterized in that: hit under real 65 times the condition two-sided, the measured void content of marshal piece is 19-24%.
8. as the manufacture method of water-permeating pitch mixed material as described in the claim 6, it is characterized in that: hit under real 65 times the condition two-sided, the measured leakage analysis losing of marshal piece is not more than 0.3%.
9. as the manufacture method of water-permeating pitch mixed material as described in the claim 6, it is characterized in that: hit under real 65 times the condition two-sided, the measured Superpave mix-design of marshal piece is not more than 20%.
10. as the manufacture method of water-permeating pitch mixed material as described in the claim 6, it is characterized in that: hit under real 65 times the condition two-sided, the Superpave mix-design after the measured long-term ageing of marshal piece is not more than 30%.
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| CN102279254A (en) * | 2011-05-09 | 2011-12-14 | 华南理工大学 | Research method for formulation of disease-free epoxy asphalt mixture for large-span steel bridge deck |
| CN102515628A (en) * | 2011-12-06 | 2012-06-27 | 长安大学 | Method for determining asphalt amount of porous asphalt mixture |
| CN102531472A (en) * | 2011-12-20 | 2012-07-04 | 上海浦东路桥建设股份有限公司 | Open-gradation storage type asphalt mixture for patching of draining asphalt pavement |
| CN107129195A (en) * | 2017-05-04 | 2017-09-05 | 苏交科集团股份有限公司 | A kind of multi-functional water-permeating pitch mixed material and preparation method thereof |
| CN111472236A (en) * | 2020-04-10 | 2020-07-31 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279254A (en) * | 2011-05-09 | 2011-12-14 | 华南理工大学 | Research method for formulation of disease-free epoxy asphalt mixture for large-span steel bridge deck |
| CN102279254B (en) * | 2011-05-09 | 2013-03-20 | 华南理工大学 | Research method for formulation of disease-free epoxy asphalt mixture for large-span steel bridge deck |
| CN102515628A (en) * | 2011-12-06 | 2012-06-27 | 长安大学 | Method for determining asphalt amount of porous asphalt mixture |
| CN102515628B (en) * | 2011-12-06 | 2013-04-24 | 长安大学 | Method for determining asphalt amount of porous asphalt mixture |
| CN102531472A (en) * | 2011-12-20 | 2012-07-04 | 上海浦东路桥建设股份有限公司 | Open-gradation storage type asphalt mixture for patching of draining asphalt pavement |
| CN102531472B (en) * | 2011-12-20 | 2013-08-28 | 上海浦东路桥建设股份有限公司 | Open-gradation storage type asphalt mixture for patching of draining asphalt pavement |
| CN107129195A (en) * | 2017-05-04 | 2017-09-05 | 苏交科集团股份有限公司 | A kind of multi-functional water-permeating pitch mixed material and preparation method thereof |
| CN111472236A (en) * | 2020-04-10 | 2020-07-31 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
| CN111472236B (en) * | 2020-04-10 | 2021-12-21 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
| CN115286292A (en) * | 2022-07-27 | 2022-11-04 | 中国建筑第八工程局有限公司 | Rubber modified open-graded asphalt wearing layer and optimal asphalt using amount setting method thereof |
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