CN103319906B - A kind of very thin surface abrasion layer pitch, its compound and use thereof - Google Patents
A kind of very thin surface abrasion layer pitch, its compound and use thereof Download PDFInfo
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Abstract
The present invention relates to a kind of very thin surface abrasion layer pitch, wherein containing parts by weight is the heavily friendship of 90-96 part or conventional modifying asphalt, and with the addition of built agent, the parts by weight of described built agent consist of, polymkeric substance 2-3 part, rubber 1-3 part, dispersing auxiliary 1.5-3 part, which raises the adhesive power of the viscosity of pitch, stiffness and pitch and building stones, avoid or reduce compound under the effect of temperature and traffic load, producing pitch floating, blocking space, causes construction depth, drainage performance and noise reduction to decline; And disclose the compound of this kind of pitch, Gradation Control point is added in this compound, and disconnected level is matched with open level, obtain stable skeleton embedded squeezing structure and maximum skeleton gap, obtain larger voidage, maximum connectivity gap rate, thus avoid skeleton unstability to cause function of surface to decay; Also disclose the using method of this compound.
Description
Technical field
The invention belongs to Expressway Pavement Material field, particularly relate to a kind of pitch mixing the very thin surface abrasion layer of heat paving for heat, and the compound of this pitch, and use.
Background technology
Since entering 21st century, the motorway that China builds in early days has much entered repaiies the stage greatly, and maintenance is correlated with, the international exchange of idea and technology is day by day frequent, large-scale maintenance of equipment is progressively introduced, all impel highway maintenance, particularly Highway Maintenance enters the stage of a new numerous and complicated.Preventive maintenance idea and correlation technique are understood by vast highway engineering technician and are accepted gradually, and district has carried out trial in various degree throughout the country, and achieve certain actual effect.
By the end of the year 2011, total mileage of highway 4,080,000 kilometers, motorway 8.5 ten thousand kilometers, motorway mileage the second in the world, will be only second to the U.S., to 2015, become the world have the maximum country of motorway mileage by surmounting the U.S..From government aspect, so huge assets need value preserving, increment, from social aspect, must ensure unimpeded, the safety and comfort of these roads, so preventive maintenance will be best means and maximum demand.
The maintenance of road at different levels, maintenance and transformation extensive market, need the various maintenance technologies adapted to it.In recent years, preventive maintenance more and more receives the concern of industry because of its technology economy advantage, relevant technological development or the introduce absorption work to foreign technology are carried out in succession.At present, the preventive maintenances such as mist sealing, slurry seal, synchronous surface dressing, macro sheet place, micro-surface area, ultra-thin wearing layer, milling overlay or direct overlay are progressively applied at home, and some is better promoted.Ultra-thin wearing layer occurs the eighties in last century in France, introduces the U.S. and be widely applied after the nineties.By means of the safety of its excellence, environmental protection and comfort property and outstanding comprehensive economy, after ultra-thin wearing layer entered China in 2002, be day by day subject to the attention of industry, be applied in several provinces and regions soon, but its defect also progressively shows, cost is too high, and function of surface decay is too fast.
Ultra-thin wearing layer technology conventional at present has several as follows:
(1) Novachip ultra-thin wearing layer: this technology is developed by French Colas and had patent, is bought afterwards by KOCH company of the U.S., and starts to promote in China with 2002.Thickness 1.5-2.5cm, gap grading, skeleton gap structure, nominal particle diameter is respectively 4.75mm, 9.5mm and 12.5mm; Pitch adopts SBS finished product asphaltum and SBS finished product modified emulsifying asphalt respectively; Water-proof tack coat is adopted to spray and mixture laying synchronous construction technique.
Not enough: cost is very high, the decay of construction depth, drainability and noise reduction is very fast, and pitch can only in the plant produced of shell.
(2) InnoChip ultra-thin wearing layer: this technology copies NovaChip to develop by Shanghai Longfu Material Technology Co., Ltd..Thickness 1.0-2.5cm, gap grading, skeleton gap structure, nominal particle diameter is respectively 9.5mm and 13.2mm; Pitch adopts direct-throwing modifying asphalt and high adhered modification emulsified bitumen respectively; Water-proof tack coat is adopted to spray and mixture laying synchronous construction technique.
Not enough: the case history not having 1.0cm, cost is higher, and function of surface decay is very fast, because waterproof adhesion coating asphalt viscosity is comparatively large, sprays wayward.
(3) UTB ultra-thin wearing layer: this technology is developed by Southeast China University, Thickness ness 1.5-2.5cm, half open gradation, nominal particle diameter is respectively 9.5mm and 6.7mm; Pitch is SBS modifying asphalt and emulsified bitumen.First water-proof tack coat is adopted to spray, the step-by-step construction technique of rear mixture laying.
Not enough: cannot to provide good water-proof binding performance, speed of application is slow, and compare with (2) with (1), function of surface is poor.
(4) SMA-10: thickness 2.5-3.0cm, gap grading, framework dense structure, nominal particle diameter is 9.5mm; Add fiber; Pitch is conventional modifying asphalt and conventional adhesion coating pitch; First water-proof tack coat is adopted to spray, the step-by-step construction technique of rear mixture laying.
Not enough: compactness is difficult to ensure, easily seeps water and occurs loose; Poor with the bond effect of sub-layer, cannot provide enough rainy day cling properties, decrease of noise functions nothing compared with conventional road surface significantly improves; Speed of application is slow
(5) AC-10: thickness 2.5-3.0cm, continuous grading, compact structure, nominal particle diameter is 9.5mm; Pitch is conventional modifying asphalt and conventional adhesion coating pitch; First water-proof tack coat is adopted to spray, the step-by-step construction technique of rear mixture laying.
Not enough: compactness is difficult to ensure, easily seeps water and occurs loose; With the bond effect extreme difference of sub-layer, very easily occur coming off; Function of surface is poor; Speed of application is slow.
(6) SAC-10: thickness 2.5-3.0cm, half open gradation, skeleton structure, nominal particle diameter is 9.5mm; Pitch is conventional modifying asphalt and conventional adhesion coating pitch; First water-proof tack coat is adopted to spray, the step-by-step construction technique of rear mixture laying.
Not enough: compactness is difficult to ensure, easily seeps water and occurs loose; With the bond effect extreme difference of sub-layer, function of surface is general; Speed of application is slow.
Summary of the invention
The technical problem that the present invention solves is exist in existing ultra-thin wearing layer technology, the problem that the decay of construction depth, drainage performance and noise reduction is too fast, excessive; And the cost of prior art crosses the problems such as high.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of very thin surface abrasion layer pitch, wherein containing parts by weight is the heavily friendship of 90-96 part or conventional modifying asphalt, built agent is with the addition of in this pitch, the parts by weight of described built agent consist of, polymkeric substance 2-3 part, rubber 1-3 part, dispersing auxiliary 1.5-3 part, by product solvent-extracted oil when described dispersing auxiliary is inverted sequence technique bright stock or petroleum catalytic cracking return one or both the combination in the solvent-extracted oil splitting oil, wherein solvent refers to the one in N-Methyl pyrrolidone, furfural or phenol solvent, extracts oil fragrance point content out and is greater than 90%.
The preferred version of described very thin surface abrasion layer pitch is also comprise the polyphosphoric acid that parts by weight are 0.01-0.03 part in described composition.
The preferred version of described very thin surface abrasion layer pitch is that described polymkeric substance is ethylene methyl acrylate copolymer.
The preferred version of described very thin surface abrasion layer pitch is, described rubber is its S/B ratio of styrene-butadiene rubber(SBR) be 70/30 undulating quantity is 2, or natural rubber.
Described very thin surface abrasion layer asphalt, when surface abrasion resistance layer thickness is 1.2cm-1.5cm, it contains parts by weight is the gathering materials of 90-93 part, the filler of 2-4 part, the above-mentioned pitch of 4.5-5.5 part, the particle diameter of the described middle coarse aggregate that gathers materials is 5-8mm, the particle diameter of fine aggregate is 0-3mm, and is that 6.3mm place arranges Gradation Control point at particle diameter; Be broken as gap grading at 2.36-4.75mm place, below 2.36mm is open gradation design; When thickness is 0.8-1.0cm, it contains parts by weight is the gathering materials of 89-92 part, the filler of 2-4 part, the above-mentioned pitch of 5.5-6.5 part, the particle diameter of the described middle fine aggregate that gathers materials is 3-5mm and 0-3mm, and at particle diameter to be below 2.36mm be open gradation design.
The preferred version of described very thin surface abrasion layer asphalt is that the grating of described compound is as shown in table 1 below.
The requirement of table 1 very thin surface abrasion layer mixture gradation
The preferred version of described very thin surface abrasion layer asphalt is, described filler is that hydrophobic nature building stones are through the levigate breeze obtained.
The preferred version of described very thin surface abrasion layer asphalt is that described hydrophobic nature building stones are limestone.
A use for very thin surface abrasion layer asphalt, aggregate heating temperature is 175-185 DEG C, the Heating temperature of pitch is 160-170 DEG C; Its mix blanking order gathers materials for first adding, and is then pitch, finally adds filler, by its effective mix 45s, and ensure that the drop temperature of compound is less than 195 DEG C; The paving material of this hot-mix asphalt mixture is 160-170 DEG C.
The preferred version of the use of described very thin surface abrasion layer asphalt is, it is the laying that 0.8-1.5cm heat mixes ultra-thin surfaces wearing course that described asphalt is applicable to thickness.
One involved in the present invention very thin surface abrasion layer pitch, wherein with the addition of built agent, and described built agent is made up of polymkeric substance, rubber, dispersing auxiliary and other additives.The polymkeric substance wherein used is ethylene methyl acrylate copolymer, and it can be cross-linked with the unsaturated link(age) in pitch, thus forms the compound copolymer of multipolymer/pitch.From pitch detected result to batch test result, by the interpolation of compound modifier, the adhesive power of the viscosity of pitch, stiffness and pitch and building stones is obtained for and significantly improves, avoid or reduce compound under the effect of temperature and traffic load, producing pitch floating, blocking space, causes construction depth, drainage performance and noise reduction to decline.
The constituent rubber of the built agent added in pitch can be styrene-butadiene rubber(SBR), and S:B is at about 70:30, and undulating quantity is 2, or natural rubber.The above multipolymer of simple use, the indexs such as the ductility of pitch significantly reduce, and we with the addition of styrene-butadiene rubber(SBR) or the natural rubber that significantly can improve pitch ductility.Styrene-butadiene rubber(SBR) or natural rubber can improve low-temperature performance and the water repelling property of pitch.
Another integral part in built agent, dispersion solubility promoter is a kind of Thermo-sensitive lightweight grease.Pitch can be accelerated to above-mentioned 2 kinds of polymers swell, above-mentioned 2 kinds of polymkeric substance just can be dispersed in pitch uniformly by stirring at low speed effect, thus significantly save tooling cost.By product solvent-extracted oil when it can be inverted sequence technique bright stock or petroleum catalytic cracking return one or both the combination in the solvent-extracted oil splitting oil, wherein solvent refers to N-Methyl pyrrolidone, furfural or phenol solvent, extracts oil fragrance point content out and is greater than 90%.Other additives in built agent are polyphosphoric acid etc., accelerate the material of ethylene methyl acrylate copolymer solubilizing reaction in pitch.Built agent can join with the unsaturated link(age) generation glue in pitch and reacts, generate stable network structure multipolymer, improve the adhesive power of the viscosity of pitch, stiffness and pitch and building stones, avoid or reduce compound under the effect of temperature and traffic load, producing pitch floating, blocking space, causes construction depth, drainage performance and noise reduction to decline.
Asphalt is that to realize thickness be that 0.8-1.5cm heat mixes the laying of ultra-thin surfaces wearing course, and ensure not affect performance and construction, compound uses the coarse aggregate of special size, and particle diameter is 5-8mm(China specification is 5-10mm), and add the Gradation Control point of 6.3mm; Fine aggregate is standard particle diameter 3-5mm and 0-3mm; Filler is index limestone breeze.The grating of gathering materials must meet the requirement of table 2.
Table 2 aggregate grading requires:
5-8mm is adopted to gather materials and the Gradation Control of 6.3mm, when 1.2-1.5cm compacted depth, according to interference theory and engineering experience, stable skeleton embedded squeezing structure can be obtained, with maximum skeleton gap, meanwhile, the generation under action of traffic loading of gathering materials avoiding the formation of skeleton is slided and moves, object obtains larger voidage, maximum connectivity gap rate, and avoid skeleton unstability to cause function of surface to decay.
In order to the function of surface of maximum raising wearing course, and it is too fast and excessive effectively to avoid function of surface to decay, and adopts 2.36-4.75mm place to disconnect (gap grading) gradation design method in conjunction with below 2.36mm open (open gradation).
Use the design that 2.36-4.75mm place disconnects, object be avoid or reduce 2.36-4.75mm particle diameter secondary embedded squeezing of gathering materials between coarse aggregate, form unstable skeleton structure, cause under Driving Loading, function of surface decays too fast, excessive.In compound gathers materials composition, lack or only have the mixture gradation gathered materials of certain median diameter of minimum content, this graded mixture has better skeleton structure and provides better road surface function.
In conjunction with the gradation design of below 2.36mm open (open gradation), object reduces fine aggregate blocking skeleton gap, voidage and connectivity gap rate are diminished, to obtain larger voidage, larger connectivity gap rate and larger unit void volume, to improve the texture depth on road surface, frictional coefficient, top layer drainability and noise reduction.
Compared with prior art the present invention has following excellent effect: in pitch, add built agent, improve the adhesive power of the viscosity of pitch, stiffness and pitch and building stones, avoid or reduce compound under the effect of temperature and traffic load, producing pitch floating, blocking space, causes construction depth, drainage performance and noise reduction to decline; Compound uses the coarse aggregate of special size, particle diameter is 5-8mm, and adds the Gradation Control point of 6.3mm, obtains stable skeleton embedded squeezing structure and maximum skeleton gap, obtain larger voidage, maximum connectivity gap rate, thus avoid skeleton unstability to cause function of surface to decay; And gather materials the gradation design method disconnecting at 2.36-4.75mm place and opening in conjunction with below 2.36mm, thus improve the function of surface of wearing course, and it is too fast and excessive effectively to avoid function of surface to decay.
Embodiment
Following examples are used for explaining the present invention further.
Embodiment 1:
Heavily 70# asphalt heating is handed over to make it have mobility to 160 DEG C by 90 parts for subsequent use.Extract 3 parts of dispersion solubility promoter N-Methyl pyrrolidone out oil, 3 parts of styrene butadiene rubber powders join in the pitch of melting successively, stir 2 hours.3 parts of ethylene methyl acrylate copolymers are added in pitch, stirs 30 minutes to guarantee its complete melting dispersion.Add the polyphosphoric acid of 0.02 part, continue stirring reaction 2 hours, obtain pitch finished product, the performance index of finished product asphaltum are in table 3.
Table 3 compound performance of modified bitumen index
Present case asphalt mixture design thickness is 1.5cm, adopts 5-8mm basalt, 0-3mm limestone machine-made sand, limestone mineral powder.
Building stones, breeze screening result are in table 4, and performance test results of gathering materials is in table 5 and 6.
Table 4 gathers materials screening result
Table 5 coarse aggregate performance test results
| Test subject | Testing method | Unit | Result | Requirement |
| Los Angeles abrasion loss | T0317-2000 | % | 19.3 | 28max |
| Elongated flat granule content 3:1 | T0312-2000 | % | 8.6 | 10max |
| The single plane of disruption | T0346-2000 | % | 100 | 100min |
| Two or more plane of disruption | T0346-2000 | % | 100 | 90min |
Table 6 fine aggregate performance test results
| Test subject | Testing method | Unit | Result | Requirement |
| Sand equivalent | T0334-1994 | % | 62.2 | 60min |
| Fine aggregate angularity is tested | T0344-2000 | % | 42.3 | 40min |
Require to carry out gradation design according to grading limit.Under design grating, the ratio of each shelves material is as shown in table 7, and design grating is in table 8.Can find out, design grating meets area requirement.
The each shelves of table 7 gather materials, proportion of filler
Table 8 asphalt mixture design grating
The Heating temperature of to be the aggregate heating temperature of 90 parts by parts by weight the be pitch of 175 DEG C, 4.8 parts is 160 DEG C, adds simultaneously and mixes cylinder mix 10s; Then add the filler of 5.2 numbers, effective mix 45s, and ensure that the drop temperature of compound is less than 195 DEG C; The mold temperature that paves of this hot-mix asphalt mixture is 160 DEG C.Its bulk properties and performance requriements are in table 9.
Table 9 mixture volume characteristic and performance test results
| Project | Result | Index |
| Porosity Va (%), Min | 12.6 | 10 |
| Void in mineral aggregate VMA (%), Min | 23.0 | 21 |
| Pitch interstitial rate VFA (%), | 45.2 | 30-60 |
| Ratio of filler bitumen (%), Max | 1.1 | 1.4 |
| Oil film thickness (μm), Min | 11.7 | 9 |
| Dynamic stability (secondary/min), Min | 16391 | 4000 |
| Freeze-thaw split intensity TSR (%), Min | 92.6 | 80 |
| Analyse Lou (%), Max | 0.06 | 0.1 |
Pitch and compound index all meet the demands.Design grating meets the requirements, and the volume index of compound and oil film thickness all meet design requirement with this understanding.Wax deposition volume shows, without unnecessary free pitch in compound, asphalt optimum content is suitable.Moisture Damage test-results shows, the anti-water damage property of compound is good.Dynamic stability test result shows, mixture gradation meets stable skeleton structure, and the high-temperature stability of pitch meets the demands.
Embodiment 2:
94 parts of SBS modification I-B asphalt heatings are made it have mobility to 165 degrees Celsius for subsequent use, will disperse solubility promoter 1.0 parts of N-Methyl pyrrolidone and 1.0 portions of furfural extract oils, 2 parts of styrene butadiene rubber powders once join in the pitch of melting, stir 2 hours.Add in pitch by 2.5 parts of ethylene methyl acrylate copolymers, stir 3.5 hours, obtain pitch finished product, the performance index of finished product asphaltum are in table 10.
Table 10 compound performance of modified bitumen index
Present case asphalt mixture design thickness is 1.2cm, adopts 5-8mm basalt, 0-3mm limestone machine-made sand, limestone mineral powder.
Building stones, breeze screening result are in table 11, and performance test results of gathering materials is in table 12 and 13.
Table 11 gathers materials screening result
Table 12 coarse aggregate performance test results
| Test subject | Testing method | Unit | Result | Requirement |
| Los Angeles abrasion loss | T0317-2000 | % | 21.2 | 28max |
| Elongated flat granule content 3:1 | T0312-2000 | % | 3.2 | 10max |
| The single plane of disruption | T0346-2000 | % | 100 | 100min |
| Two or more plane of disruption | T0346-2000 | % | 100 | 90min |
Table 13 fine aggregate performance test results
| Test subject | Testing method | Unit | Result | Requirement |
| Sand equivalent | T0334-1994 | % | 71 | 60min |
| Fine aggregate angularity is tested | T0344-2000 | % | 41.3 | 40min |
Require to carry out gradation design according to grading limit.Under design grating, the ratio of each shelves material is as shown in table 14, and design grating is in table 15.Can find out, design grating meets area requirement.
The each shelves of table 14 gather materials, proportion of filler
Table 15 asphalt mixture design grating
The Heating temperature of to be the aggregate heating temperature of 93 parts by parts by weight the be pitch of 185 DEG C, 5 parts is 170 DEG C, adds simultaneously and mixes cylinder mix 10s; Then add the filler of 2 numbers, effective mix 45s, and ensure that the drop temperature of compound is less than 195 DEG C; The mold temperature that paves of this hot-mix asphalt mixture is 165 DEG C.Its bulk properties and performance requriements are in table 16.
Table 16 mixture volume characteristic and performance test results
| Project | Result | Index |
| Porosity Va (%), Min | 14.0 | 10 |
| Void in mineral aggregate VMA (%), Min | 21.9 | 21 |
| Pitch interstitial rate VFA (%), | 36.0 | 30-60 |
| Ratio of filler bitumen (%), Max | 0.9 | 1.4 |
| Oil film thickness (μm), Min | 13.5 | 9 |
| Dynamic stability (secondary/min), Min | 24230 | 4000 |
| Freeze-thaw split intensity TSR (%), Min | 83.5 | 80 |
| Analyse Lou (%), Max | 0.07 | 0.1 |
Pitch and compound index all meet the demands.Design grating meets the requirements, and the volume index of compound and oil film thickness all meet design requirement with this understanding.Wax deposition volume shows, without unnecessary free pitch in compound, asphalt optimum content is suitable.Moisture Damage test-results shows, the anti-water damage property of compound is good.Dynamic stability test result shows, mixture gradation meets stable skeleton structure, and the high-temperature stability of pitch meets the demands.
Case three
96 parts of modification I-C asphalt heatings are made it have mobility to 170 degrees Celsius for subsequent use, solubility promoter 1.0 parts of N-Methyl pyrrolidone and 0.5 part of phenol solvent will be disperseed to extract oil out, and 1.0 parts of natural rubber powder join in the pitch of melting successively, stir 2 hours.Add in pitch by 2.0 parts of ethylene methyl acrylate copolymers, stir and within 30 minutes, guarantee its complete melting dispersion, adds 0.01 part of polyphosphoric acid, and maintain 170 degrees Celsius of continuation stirrings and obtain finished product in 2 hours, the performance index of finished product asphaltum are in table 17.
Table 17 compound performance of modified bitumen index
Present case asphalt mixture design thickness is 0.8cm, adopts 3-5mm basalt, 0-3mm limestone machine-made sand, limestone mineral powder.
Building stones, breeze screening result are in table 18, and performance test results of gathering materials is in table 19.
Table 18 gathers materials screening result
Table 190-3mm fine aggregate performance test results
| Test subject | Testing method | Unit | Result | Requirement |
| Sand equivalent | T0334-1994 | % | 71 | 60min |
| Fine aggregate angularity is tested | T0344-2000 | % | 41.3 | 40min |
Require to carry out gradation design according to grading limit.Under design grating, the ratio of each shelves material is shown in table 20, and design grating is in table 21.Can find out, design grating meets area requirement.
The each shelves of table 20 gather materials, proportion of filler
Table 21 asphalt mixture design grating
The Heating temperature of to be the aggregate heating temperature of 90 parts by parts by weight the be pitch of 180 DEG C, 5.9 parts is 165 DEG C, adds simultaneously and mixes cylinder mix 10s; Then add the filler of 3 numbers, effective mix 45s, and ensure that the drop temperature of compound is less than 195 DEG C; The mold temperature that paves of this hot-mix asphalt mixture is 175 DEG C.Its bulk properties and performance requriements are in table 22.
Table 22 mixture performance and performance requriements
| Project | Result | Index |
| Porosity Va (%), Min | 13.8 | 10 |
| Void in mineral aggregate VMA (%), Min | 29.0 | 21 |
| Pitch interstitial rate VFA (%), | 52.4 | 30-60 |
| Ratio of filler bitumen (%), Max | 1.2 | 1.4 |
| Oil film thickness (μm), Min | 9.1 | 9 |
| Dynamic stability (secondary/min), Min | 6369 | 4000 |
| Freeze-thaw split intensity TSR (%), Min | 82.2 | 80 |
| Analyse Lou (%) Max | 0.02 | 0.1 |
Pitch and compound index all meet the demands.Design grating meets the requirements, and the volume index of compound and oil film thickness all meet design requirement with this understanding.Wax deposition volume shows, without unnecessary free pitch in compound, asphalt optimum content is suitable.Moisture Damage test-results shows, the anti-water damage property of compound is good.Dynamic stability test result shows, mixture gradation meets stable skeleton structure, and the high-temperature stability of pitch meets the demands.
Claims (8)
1. a very thin surface abrasion layer pitch, it is wherein the heavy traffic paving asphalt of 90-96 part containing parts by weight, it is characterized in that: in described very thin surface abrasion layer pitch, with the addition of built agent, the parts by weight of described built agent consist of, polymkeric substance 2-3 part, rubber 1-3 part, dispersing auxiliary 1.5-3 part, by product solvent-extracted oil when described dispersing auxiliary is inverted sequence technique bright stock or petroleum catalytic cracking return one or both the combination in the solvent-extracted oil splitting oil, wherein solvent refers to N-Methyl pyrrolidone, one in furfural or phenol solvent, extract oil fragrance point content out and be greater than 90%, described polymkeric substance is ethylene methyl acrylate copolymer, the polyphosphoric acid that parts by weight are 0.01-0.03 part is also comprised in described very thin surface abrasion layer pitch.
2. very thin surface abrasion layer pitch according to claim 1, is characterized in that: described rubber is its S/B ratio of styrene-butadiene rubber(SBR) be 70/30 undulating quantity is 2, or natural rubber.
3. a very thin surface abrasion layer asphalt, when surface abrasion layer thickness is 1.2cm-1.5cm, it contains parts by weight is the gathering materials of 90-93 part, the filler of 2-4 part, the pitch according to claim 1 of 4.5-5.5 part, it is characterized in that: described in the gather materials particle diameter of middle coarse aggregate be 5-8mm, the particle diameter of fine aggregate is 0-3mm, and is that 6.3mm place arranges Gradation Control point at particle diameter; Be broken as gap grading at 2.36-4.75mm place, below 2.36mm is the design of open grating.
4. a very thin surface abrasion layer asphalt, when surface abrasion layer thickness is 0.8-1.0cm, it contains parts by weight is the gathering materials of 89-92 part, the filler of 2-4 part, the pitch according to claim 1 of 5.5-6.5 part, it is characterized in that: described in the gather materials particle diameter of middle fine aggregate be 3-5mm and 0-3mm, and be below 2.36mm at particle diameter be open gradation design.
5. the very thin surface abrasion layer of the one according to claim 3 or 4 asphalt, is characterized in that: the grating of described compound is as shown in the table.
6. the very thin surface abrasion layer of the one according to claim 3 or 4 asphalt, is characterized in that: described filler is that hydrophobic nature building stones are through the levigate breeze obtained.
7. one according to claim 6 very thin surface abrasion layer asphalt, is characterized in that: described hydrophobic nature building stones are limestone.
8. a kind of use of very thin surface abrasion layer asphalt as described in claim 3 or 4, is characterized in that: aggregate heating temperature is 175-185 DEG C, the Heating temperature of pitch is 160-170 DEG C; Its mix blanking order gathers materials for first adding, and is then pitch, finally adds filler, by its effective mix 45s, and ensure that the drop temperature of compound is less than 195 DEG C; The mold temperature that paves of this very thin surface abrasion layer asphalt is 160-170 DEG C.
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| CN105694496A (en) * | 2016-04-11 | 2016-06-22 | 张超 | Ultrathin asphalt membrane for engineering interface treatment and usage thereof |
| CN114180884A (en) * | 2021-11-12 | 2022-03-15 | 山西省交通科技研发有限公司 | Gradation design method for framework dense ultrathin overlay asphalt mixture |
| CN114180886B (en) * | 2021-12-24 | 2023-03-17 | 上海浦东路桥(集团)有限公司 | Self-adhesive asphalt concrete and preparation method and construction process thereof |
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| JP2010059377A (en) * | 2008-09-08 | 2010-03-18 | Bridgestone Corp | Method for manufacturing asphalt rubber |
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Inventor after: Chen Hualiang Inventor after: Shi Hongxing Inventor after: Liu Zhaoyu Inventor after: Liao Weidong Inventor after: Lu Shanfeng Inventor after: Jiao Pengpeng Inventor after: Qin Pengxun Inventor after: Zhang Wei Inventor after: Dong Yuezhen Inventor before: Shi Hongxing Inventor before: Chen Zhijie Inventor before: Liao Weidong Inventor before: Lu Shanfeng Inventor before: Jiao Pengpeng Inventor before: Qin Pengxun Inventor before: Zhang Wei Inventor before: Dong Yuezhen |
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