CN104762863B - Bituminous mixture used for thin layer overlay of cement concrete pavement and preparation and construction methods of bituminous mixture - Google Patents
Bituminous mixture used for thin layer overlay of cement concrete pavement and preparation and construction methods of bituminous mixture Download PDFInfo
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Abstract
The invention discloses a bituminous mixture used for a thin layer overlay of cement concrete pavement and preparation and construction methods of the bituminous mixture. The bituminous mixture comprises mineral aggregate, bitumen, a fiber stabilizer and an additive, wherein filler in the mineral aggregate is copper tailing power. The bituminous mixture has the advantages that the copper tailing power is used as the filler in the bituminous mixture, thus copper tailing is comprehensively recycled. Besides, the bituminous mixture is superior in performances, is easily compacted, and can be paved on the cement concrete pavement for 1.5-2.5cm; the damaged pavement can be quickly repaired after construction; the smoothness and the skid resistance of the pavement are restored; the quality of the pavement is improved; the service life of the pavement is prolonged; driving comfort and safety are improved; the pavement can also be precured; the construction cost is lowered; energy and resources are saved; influences on environment and facilities are reduced; and the like. Moreover, the preparation method and the construction method of the bituminous mixture are simple and practicable, easy to operate and high in practicability.
Description
Technical field
The present invention relates to a kind of asphalt and preparation method thereof and construction method, be specifically related to one and copper tailing is returned
Receive utilization and the asphalt being applied to cement concrete pavement thin overlay and preparation method thereof and construction method, belong to
Building material technical field used in the engineering of road.
Background technology
Asphalt concrete pavement is a kind of flexible high class pavement, repairs Paving Bituminous Concrete surface layer for old asphalt pavement
Fairly simple, it is only necessary to Disease Processing to be got well and carried out the overlap joint operation of new-old pavement, it is possible to entirety has given play to Colophonium coagulation
The effect of soil surface.
In contrast, cement concrete pavement is a kind of rigidity high class pavement, in natural environment and the length of vehicular load
Under phase effect, adding the defect himself existed, road surface is the most damaged, is difficult to repair, and under the effect that stress is concentrated, broken
The road surface damaged is easy to extend rapidly come.In order to reduce the maintenance cost of breakage on cement concrete pavement section, and avoid or
Reducing cement concrete pavement to be damaged prematurely, we are necessary to take some to repair and preventive maintenance measure.Domestic
Outer research shows, it is to add black top coagulation on the basis of original road surface that cement concrete pavement is transformed most viable measure
Soil surface layer makees wearing course.But, more complicated for Laying Asphalt Surface Course on Cement Concrete Pavement, at present, China's Colophonium mixing
Material thin overlay technology application on bituminous paving is the most ripe, but the application on cement concrete pavement is also compared
Few.Colophonium on Old cement concrete is added by China " highway cement concrete pavement design specification " (JTG D40-2011)
Laying only provides the suggestion of some directiveness: should be according to temperature, load, concrete road surface bearing capacity, joint slab ability etc.
Reasonable selection slows down the measure of reflection crack, including the thickness increasing asphalt overlay；In asphalt adding of fiber and
The modifying agent such as rubber；Stress absorbing layer or geotextile interlayer etc. are set in concrete slab end face or overlay.Asphalt overlaying
The thickness of layer should be taken into account the nominal maximum particle diameter of asphalt and match and slow down the requirement of reflection crack and determine.Highway
Being preferably 100mm with the minimum thickness of Class I highway, the minimum thickness of other standard highways is preferably 80mm, and this thickness not only improves
The comprehensive cost on road surface, and some location improves grade elevation and can affect road equipment.Therefore, if thickness energy
Enough it is down to about 2cm, maintenance and precuring cost can be significantly reduced.But, the overlay thickness of only 2cm can give the pressure of compound
Bring great difficulty, especially in microthermal climate in fact.
Additionally, mine tailing is the garbage after ore dressing, it it is the key component of industrial solid castoff.At present, China's tail
Ore deposit amount up to more than 10,000,000,000 tons, discharges mine tailing amount year and is up to 500,000,000 more than t, and wherein copper tailing account for greatly, and China
Comprehensive utilization of tailing rate the lowest, substantial amounts of mine tailing is piled up for a long time and not only air and water and soil is caused serious pollution, and
And occupy a large amount of agricultural land, if adding that Tailings Dam management, design are not good at, accident of easily decaying, causes personnel to hinder
Die.Additionally, along with building industry and the development of Highway Cause, the demand of sandstone material is increased day by day, but natural sandstone
Material is non-renewable resources in a kind of short time, causes sand and stone resources in short supply, and price rises steadily.Mine tailing wide variety, group
Point complexity, all kinds of mine tailing utilizabilitys are also not quite similar, and every kind of mine tailing is different due to component, its hydrophilic coefficient, plasticity index and
Add the character such as thermostability the most otherwise varied, therefore different mine tailings is needed just can obtain through substantial amounts of research and test
Sufficiently effective utilization.
At present, only some data shows that the fine aggregate by iron tailings sand replaces in asphalt uses, and does not also have
Data shows and can be applied in asphalt by copper tailing, is particularly applied to cement concrete pavement thin overlay Colophonium
In the filler of compound, it requires higher for raw material.Therefore, how copper tailing is applied to cement concrete pavement thin layer
In the asphalt of cover, the thickness of the most thinning asphalt, meet the compacting requirement of compound simultaneously, moreover it is possible to
The comprehensive cost reducing road surface is a difficult problem the most urgently to be resolved hurrily.
Summary of the invention
Goal of the invention: an object of the present disclosure is to provide a kind of collection recycling copper tailing, reparation and precuring cement and mixes
The asphalt that solidifying soil surface is integrated；
The second object of the present invention is to provide the preparation method of this asphalt；
The third object of the present invention is to provide the construction method of this asphalt.
Technical scheme: asphalt of the present invention, including mineral aggregate, Colophonium, fiber stabilizer and additive, its
In, described mineral aggregate, by gathering materials and filler forms, gathers materials for basalt, diabase or limestone, and filler is copper tailing powder, gather materials and
The percentage by weight of filler is 96～94%:4～6%；Described Colophonium is polymer modified asphalt or heavy traffic plain asphalt, front
Person's bitumen aggregate ratio is 5.6～6.0%, and the latter's bitumen aggregate ratio is 5.8～6.2%, and its bitumen aggregate ratio is the percentage by weight that Colophonium accounts for mineral aggregate；
Described fiber stabilizer is polyester fiber or lignin fibre, and its weight is the 0.1～0.3% of mineral aggregate gross weight；Described interpolation
Agent is composite synergist, and its weight is the 0.3～0.6% of mineral aggregate gross weight.
Described additive is mixed by composite synergist and warm-mixing agent, wherein, and composite synergist and the weight of warm-mixing agent
Amount respectively accounts for the 0.3～0.6% of mineral aggregate gross weight.The nominal maximum aggregate size of asphalt is 6.7mm.
The grading limit of mineral aggregate is:
The preparation method of the asphalt for cement concrete pavement thin overlay of the present invention, including walking as follows
Rapid:
For polymer modified asphalt, in advance mineral aggregate being heated to 180～190 DEG C, polymer modified asphalt is heated to 165
～175 DEG C；Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10～15s, wherein, as the copper of filler in mineral aggregate
Mine tailing is met fineness and grating requirement by copper tailing through grinding screening；It is subsequently adding polymer modified asphalt wet-mixing 50～55s,
Last discharging to control drop temperature be 170～180 DEG C；
For heavy traffic plain asphalt, in advance mineral aggregate being heated to 170～180 DEG C, heavy traffic plain asphalt is heated to 155
～165 DEG C；Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10～15s, wherein, as the copper of filler in mineral aggregate
Mine tailing is met fineness and grating requirement by copper tailing through grinding screening；It is subsequently adding heavy traffic plain asphalt wet-mixing 50～55s,
Last discharging to control drop temperature be 160～170 DEG C.
The construction method of the asphalt for cement concrete pavement thin overlay of the present invention, including walking as follows
Rapid:
(1) according to former cement concrete pavement situation, it is carried out pretreatment；
(2) road surface is cleaned；
(3) SBS that stickup high-performance polyester cloth or Fibergrass polyester mat at the crack on the road surface after cleaning are made；
(4) to the road surface spraying high intensity modified emulsifying asphalt sticking layer oil after patch；
(5) pave successively and rolled asphalt after the complete breakdown of emulsion of emulsified asphalt in high intensity modified emulsifying asphalt sticking layer oil
Compound, described asphalt is layed in cement concrete road surface 1.5～2.5cm, and wherein, paving material is not less than
130 DEG C, the initial temperature rolled is not less than 120 DEG C, and the finishing temperature rolled is not less than 90 DEG C, and the temperature rolling rear road surface is less than
Traffic can be opened gradually when 50 DEG C.
Wherein, in step (1), described pretreatment includes leveling process or joint treatment, and wherein, described leveling processes and is
First measuring the flatness on road surface, the part milling then exceeded on road surface is fallen, and sunken part asphalt is filled up；Described
Joint treatment is that the gradual change in the way of oblique triangle of former cement concrete pavement is extended to new road surface.
In step (2), described cleaning road surface is that road pavement is first cleaned with sprinkling truck, then cleans with strength brusher, then
Rinse with sprinkling truck, finally blow clean with hair-dryer.
In step (4), the thickness of described stickup is less than 2.5mm, and width is 30～50cm.
Invention mechanism: the present invention is mainly adjusted by the mix-design of the Gradation Optimization compound of mineral aggregate, will reclaim profit
Copper tailing grinding after replace filler use, the additive simultaneously mixed can increase by 60 DEG C of dynamic viscosities, improve height
Warm nature energy, reduce high temperature viscosity and can compacting temperature, improve construction workability and extend the engineering time, the fiber stabilizer of incorporation
High-temperature stability, low-temperature cracking-resistance, anti-fatigue performance and water stability can be improved again, add the cementation of Colophonium, make entirety
Give play to good performance.
Gathering materials and be divided into coarse aggregate and fine aggregate, filler generally refers to the fine powder material of breeze class；Gather materials especially rough set
Material has been more skeleton function, and in fine aggregate is then filled in coarse aggregate, embedded squeezing is piled up；Breeze is to gather materials it to fill thickness
Between space, to mineral aggregate grating require higher.
Beneficial effect: compared with prior art, its remarkable advantage is the present invention: the asphalt of the present invention can reclaim profit
With copper tailing, and the filler replaced in breeze after copper tailing grinding is used, owing to copper tailing powder is cheap and easy to get, not only drop
The low cost of asphalt, moreover it is possible to improving the performance of compound, decrease pollution simultaneously, saved resource, it comprehensively returns
Receive to utilize and there is good economic benefit and social benefit.This performance of asphalt mixture is excellent and is easily compacted, and adds and is layered on cement and mixes
On solidifying soil surface only 1.5～2.5cm can be achieved with current 5～7cm the abrasion function of asphalt concrete pavement, energy after construction
Enough damaged road surfaces of repairing rapidly, the planarization on recovery road surface and skid resistance, improve pavement quality, extend the service life on road surface,
Reduce noise, improve road-ability and safety, moreover it is possible to precuring road surface, do not affect road equipment, reducing the construction costs, joint
The about energy and resource, reduces environment and the impact etc. of facility.Additionally, the asphalt preparation method of the present invention and construction party
Method is simple, easily operates, practical.
Detailed description of the invention:
Below technical scheme is described further.
Embodiment 1:
(1) component:
Gathering materials: basalt, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry company limited；
Filler: copper tailing powder, is selected from locality or periphery mining site；
Wherein, the weight ratio with filler of gathering materials is 96%:4%, describes for convenience, will gather materials here and filler is referred to as
" mineral aggregate ", mineral aggregate gradation sees table 1.
Table 1 mineral aggregate gradation
Colophonium: SBS polymer modified pitch, its bitumen aggregate ratio is 5.8%, wherein, bitumen aggregate ratio be Colophonium with mineral aggregate weight it
Ratio, this Colophonium is purchased from Jiangshu Baoli Pitch Co., Ltd..
Fiber stabilizer: polyester fiber, volume is the 0.2% of mineral aggregate weight, builds the limited public affairs of prestige construction material purchased from Changzhou
Department.
Additive: mixed by composite synergist and warm-mixing agent, volume is the 0.3% of mineral aggregate weight, composite synergistic
Agent is purchased from Shanghai Honeywell company limited, and warm-mixing agent is purchased from Changzhou Zhu Wei construction material company limited
What deserves to be explained is, composite synergist here rises has raising high-temperature stability, low-temperature cracking-resistance, Rut resistance
Can act on anti-fatigue performance etc.；Warm-mixing agent rise have reduction high temperature viscosity and can compacting temperature, improve construction workability and prolong
The long engineering times etc. act on；So both act on and differ, and collaborative using effect is more preferable.
The performance verification of asphalt is as shown in table 2, and its performance can meet technology requirement well.
Table 2 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.15 | ≤0.2 |
| Disperse loss (%) | 3.30 | ≤15 |
| Residual stability (%) | 98.5 | ≥85 |
| Freeze-thaw split strength ratio (%) | 83.5 | ≥80 |
| Dynamic stability (secondary/mm) | 5261 | ≥3000 |
Refinery operation scheduling process is as follows: according to marshall' mechanic characteristic value first target setting match ratio and carry out horse and have a rest
That compaction test, then debugs production mix proportion according to screening in hot material store and density test, so that it is determined that optimal oilstone
Ratio, finally according to optimum oil-stone ratio and selected grating, verifies the performance of compound, draws final production mix proportion
Conclusion.
(2) preparation method
Carrying out as follows: first mineral aggregate is heated to 180～190 DEG C, Colophonium is heated to 165～175 DEG C, then will collection
Material, filler, fiber stabilizer and additive mixing dry mixing 10～15s, be subsequently added into Colophonium wet-mixing 50～55s, and drop temperature is
170～180 DEG C.
Relevant parameter in above-mentioned steps is that the characteristic research according to raw materials various in asphalt and proportioning thereof draws.
(3) construction method and performance detection
The construction of asphalt is carried out as follows: it is carried out pre-according to former cement concrete pavement situation by (1)
Process；(2) road surface is cleaned；(3) stickup high-performance polyester cloth or Fibergrass polyester mat at the crack on the road surface after cleaning are made
SBS；(4) to the road surface spraying high intensity modified emulsifying asphalt sticking layer oil after patch；(5) high intensity modified emulsifying asphalt adhesion coating is treated
Pave successively after the complete breakdown of emulsion of emulsified asphalt in oil and rolled asphalt compound so that described asphalt is layed in cement
Top layer, concrete road surface 1.5～2.5cm, wherein, paving material is not less than 130 DEG C, and the initial temperature rolled is not less than 120 DEG C,
The finishing temperature rolled is not less than 90 DEG C, can open gradually traffic when rolling the temperature on rear road surface less than 50 DEG C.
Pretreatment includes leveling process or joint treatment, and wherein, it is first to measure surface evenness that leveling processes, the highest
Part milling is fallen, and low part asphalt is filled up.Joint treatment is to process the joint area on the old and new road surface with milling machine
(such as seam), to prevent face, old road from crack occur, and extends the gradual change in the way of oblique triangle of former cement concrete pavement
To new road surface.Carry out main road again after the seam at road junction, roadside is first processed with cutting machine to pave or hot seam paves.Construction
Before also tackle the height on road surface around the well lid in boundary of works area or sump and be adjusted, actual adjustment is highly considered as and well
Around lid or sump, road surface longitudinal gradient is corresponding, reduces and occurs with new road not in conplane situation after paving.For former
Cement concrete pavement has the disease palpus advanced processing such as serious check crack, horizontal, longitudinal crevasse, purt slurry, in order to reach intended ideal
Effect.
Road cleaning must be by following procedure operation: first clean with sprinkling truck, then cleans with strength brusher, then with spilling
Waterwheel rinses, and last hair-dryer blows clean.Clean up completely, after patch at road surface spraying high viscosity modified emulsifying asphalt adhesion coating
Oil, uniformly to put in place during sprinkling, it is impossible to local situation too much or very little occurs, thus affects pavement quality, meanwhile, and spray
The high viscosity modified emulsifying asphalt sticking layer oil spilt just can carry out next step construction after need to waiting until the complete breakdown of emulsion of emulsified asphalt.
In cement concrete pavement, crack treatment material should select tensile strength height, resistance to ag(e)ing and the high property of good waterproof performance
The SBS that energy mylar or Fibergrass polyester mat are made, its thickness not can exceed that 2.5mm, and width is preferably 30～50cm, and construction stickup must
Must firmly, be not moved deformation and curling.
Before paving, machine spreading position white line is released, determine the order that paves, reduce construction joint.
Thin overlay should not be constructed in microthermal climate.As needed construction, the temperature of dispatching from the factory of compound should be properly increased, and
Transport vehicle is carried out tight covering and heat insulating measure, paves and be compacted preferably carry out between 9:00am to 4:00pm, accomplishing
Fast discharging, pave and roll soon soon.Need before paving bituminous concrete paver to be cleared up and preheats, reach in temperature
Just can pave for more than 120 DEG C.When paving, paver should slowly, uniformly, pave incessantly.Use the mixing of machine spreading
Before material is not compacted, workmen must not enter and trample.Generally must not use hand finish.
Asphalt is layed in certain cement concrete pavement 1.5～2.0cm, after testing, every pavement technique index
Meet design requirement.
Embodiment 2
(1) component:
Gathering materials: limestone, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry company limited；
Filler: copper tailing powder, is selected from locality or periphery mining site；
Wherein, the weight ratio gathered materials with filler is 95%:5%；
Mineral aggregate gradation sees table 3
Table 3 mineral aggregate gradation
Colophonium: heavy traffic 70#A level Colophonium, its bitumen aggregate ratio is 6.1%, purchased from Jiangsu Zhong Youxingneng Colophonium company limited.
Fiber stabilizer: lignin fibre, volume is the 0.3% of mineral aggregate weight, builds prestige construction material purchased from Changzhou limited
Company.
Additive: mixed by composite synergist and warm-mixing agent, the former volume is the 0.6% of mineral aggregate quality, and the latter mixes
Amount is the 0.4% of mineral aggregate quality, and composite synergist is purchased from Shanghai Honeywell company limited, and warm-mixing agent is built prestige purchased from Changzhou and built
Build Materials Co., Ltd.
As shown in table 4, its performance can meet technology requirement in performance of asphalt mixture checking.
Table 4 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| Disperse loss (%) | 10.80 | ≤15 |
| Residual stability (%) | 94.5 | ≥85 |
| Freeze-thaw split strength ratio (%) | 81.0 | ≥80 |
| Dynamic stability (secondary/mm) | 4001 | ≥3000 |
(2) preparation method:
First mineral aggregate being heated to 170～180 DEG C, Colophonium is heated to 155～165 DEG C, then will gather materials, filler, fiber steady
Determining agent and additive mixing dry mixing 10～15s, be subsequently added into Colophonium wet-mixing 50～55s, drop temperature is 160～170 DEG C.
(3) construction method and performance detection:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
Asphalt is layed in certain cement concrete pavement 2.0～2.5cm, after testing, every pavement technique index
Meet design requirement.
Embodiment 3
(1) component:
Gathering materials: diabase, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry company limited；
Filler: copper tailing powder, is selected from locality or periphery mining site；
Wherein, the weight ratio gathered materials with filler is 96%:4%；
Mineral aggregate gradation sees table 5
Table 5 mineral aggregate gradation
Colophonium: SBS polymer modified pitch Colophonium, its bitumen aggregate ratio is 5.6%, purchased from the Jiangsu treasured profit limited public affairs of Colophonium share
Department.
Fiber stabilizer: polyester fiber, volume is the 0.15% of mineral aggregate weight, builds the limited public affairs of prestige construction material purchased from Changzhou
Department.
Additive: composite synergist, volume is the 0.5% of mineral aggregate quality, and this composite synergist is purchased from Shanghai Honeywell
Company limited.Herein without warm-mixing agent, it is because temperature higher, can also be preferably by bituminous mixture laying without warm-mixing agent
Compacting.
As shown in table 6, its performance can meet technology requirement in performance of asphalt mixture checking.
Table 6 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.16 | ≤0.2 |
| Disperse loss (%) | 6.5 | ≤15 |
| Residual stability (%) | 97.2 | ≥85 |
| Freeze-thaw split strength ratio (%) | 83.1 | ≥80 |
| Dynamic stability (secondary/mm) | 4598 | ≥3000 |
(2) preparation method:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
(3) construction method and performance detection:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
Asphalt is layed in certain cement concrete pavement 2.0～2.5cm, after testing, every pavement technique index
Meet design requirement.
Embodiment 4
(1) component:
Essentially identical with embodiment 1 component, difference is:
Colophonium: SBS polymer modified pitch, its bitumen aggregate ratio is 6.0%.
Fiber stabilizer: polyester fiber, volume is the 0.25% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are the 0.6% of mineral aggregate quality.
Mineral aggregate gradation sees table 7
Table 7 mineral aggregate gradation
As shown in table 8, its performance can well meet technology requirement in performance of asphalt mixture checking.
Table 8 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.13 | ≤0.2 |
| Disperse loss (%) | 3.10 | ≤15 |
| Residual stability (%) | 98.8 | ≥85 |
| Freeze-thaw split strength ratio (%) | 84.7 | ≥80 |
| Dynamic stability (secondary/mm) | 5362 | ≥3000 |
(2) preparation method:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
(3) construction method and performance detection:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
Asphalt is layed in certain cement concrete pavement 1.5～2.0cm, after testing, every pavement technique index
Meet design requirement.
Embodiment 5
(2) component:
Essentially identical with embodiment 2 component, difference is:
The weight ratio with filler of gathering materials is 95.5%:4.5%
Colophonium: heavy traffic 70#A level Colophonium, its bitumen aggregate ratio is 5.9%.
Fiber stabilizer: polyester fiber, volume is the 0.2% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are the 0.6% of mineral aggregate quality.
Mineral aggregate gradation sees table 9
Table 9 mineral aggregate gradation
As shown in table 10, its performance can meet technology requirement in performance of asphalt mixture checking.
Table 10 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| Disperse loss (%) | 8.80 | ≤15 |
| Residual stability (%) | 95.5 | ≥85 |
| Freeze-thaw split strength ratio (%) | 82.0 | ≥80 |
| Dynamic stability (secondary/mm) | 4557 | ≥3000 |
(2) preparation method:
Substantially the same manner as Example 2, can appropriately adjust according to actual production process.
(3) construction method and performance detection:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
Asphalt is layed in certain cement concrete pavement 2.0～2.5cm, after testing, every pavement technique index
Meet design requirement.
Embodiment 6
(3) component:
Essentially identical with embodiment 3 component, difference is:
Colophonium: SBS polymer modified pitch, its bitumen aggregate ratio is 5.8%.
Fiber stabilizer: polyester fiber, volume is the 0.25% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are the 0.4% of mineral aggregate quality.
Mineral aggregate gradation sees table 11
Table 11 mineral aggregate gradation
As shown in table 12, its performance can meet technology requirement in performance of asphalt mixture checking.
Table 12 Marshall Test result
| Test index | Result of the test | Technology requirement |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| Disperse loss (%) | 7.60 | ≤15 |
| Residual stability (%) | 96.1 | ≥85 |
| Freeze-thaw split strength ratio (%) | 82.5 | ≥80 |
| Dynamic stability (secondary/mm) | 4687 | ≥3000 |
(2) preparation method:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
(3) construction method and performance detection:
Substantially the same manner as Example 1, can appropriately adjust according to actual production process.
Asphalt is layed in certain cement concrete pavement 2.0～2.5cm, after testing, every pavement technique index
Meet design requirement.
Claims (9)
1. the asphalt for cement concrete pavement thin overlay, it is characterised in that: include mineral aggregate, Colophonium, fibre
Dimension stabilizer and additive, wherein, described mineral aggregate, by gathering materials and filler forms, gathers materials for basalt, diabase or limestone,
Filler is copper tailing powder, gathers materials and the percentage by weight of filler is 96～94%:4～6%；Described Colophonium is polymer modification drip
Green grass or young crops or heavy traffic plain asphalt, the former bitumen aggregate ratio is 5.6～6.0%, and the latter's bitumen aggregate ratio is 5.8～6.2%, and its bitumen aggregate ratio is drip
Green grass or young crops accounts for the percentage by weight of mineral aggregate；Described fiber stabilizer is polyester fiber or lignin fibre, and its weight is mineral aggregate gross weight
0.1～0.3%；Described additive is composite synergist, and its weight is the 0.3～0.6% of mineral aggregate gross weight.
The most according to claim 1 for the asphalt of cement concrete pavement thin overlay, it is characterised in that: described
Additive is mixed by composite synergist and warm-mixing agent, and wherein, the weight of composite synergist and warm-mixing agent respectively accounts for mineral aggregate gross weight
The 0.3～0.6% of amount.
Asphalt for cement concrete pavement thin overlay the most according to claim 1 or claim 2, it is characterised in that:
The nominal maximum aggregate size of described asphalt is 6.7mm.
Asphalt for cement concrete pavement thin overlay the most according to claim 1 or claim 2, it is characterised in that:
The grading limit of described mineral aggregate is:
The most according to claim 1, be used for the preparation method of the asphalt of cement concrete pavement thin overlay, it is special
Levy and be to comprise the steps:
For polymer modified asphalt, in advance mineral aggregate is heated to 180～190 DEG C, polymer modified asphalt be heated to 165～
175℃；Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10～15s, wherein, as the copper tail of filler in mineral aggregate
Breeze is to be met after fineness and grating require by copper tailing to use after grinding sieves；It is subsequently adding polymer modified asphalt wet-mixing
50～55s, last discharging to control drop temperature be 170～180 DEG C；
For heavy traffic plain asphalt, in advance mineral aggregate is heated to 170～180 DEG C, heavy traffic plain asphalt be heated to 155～
165℃；Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10～15s, wherein, as the copper tail of filler in mineral aggregate
Breeze is to be met after fineness and grating require by copper tailing to use after grinding sieves；It is subsequently adding heavy traffic plain asphalt wet-mixing
50～55s, last discharging to control drop temperature be 160～170 DEG C.
The most according to claim 1, be used for the construction method of the asphalt of cement concrete pavement thin overlay, it is special
Levy and be to comprise the steps:
(1) according to former cement concrete pavement situation, it is carried out pretreatment；
(2) road surface is cleaned；
(3) SBS that stickup high-performance polyester cloth or Fibergrass polyester mat at the crack on the road surface after cleaning are made；
(4) to the road surface spraying high intensity modified emulsifying asphalt sticking layer oil after patch；
(5) pave successively after the complete breakdown of emulsion of emulsified asphalt in high intensity modified emulsifying asphalt sticking layer oil and rolled asphalt mixes
Material, described asphalt is layed in cement concrete road surface 1.5～2.5cm, and wherein, paving material is not less than 130 DEG C,
The initial temperature rolled is not less than 120 DEG C, and the finishing temperature rolled is not less than 90 DEG C, when rolling the temperature on rear road surface less than 50 DEG C
Traffic can be opened gradually.
The most according to claim 6, be used for the construction method of the asphalt of cement concrete pavement thin overlay, it is special
Levying and be: in step (1), described pretreatment includes leveling process or joint treatment, and wherein, it is first to measure road that described leveling processes
The flatness in face, then falls the part milling exceeded on road surface, and sunken part is filled up with described asphalt；Described connect
It is that the gradual change in the way of oblique triangle of former cement concrete pavement is extended to new road surface that seam processes.
The most according to claim 6, be used for the construction method of the asphalt of cement concrete pavement thin overlay, it is special
Levying and be: in step (2), described cleaning road surface is that road pavement is first cleaned with sprinkling truck, then cleans with strength brusher, then uses
Sprinkling truck rinses, and finally blows clean with hair-dryer.
The most according to claim 6, be used for the construction method of the asphalt of cement concrete pavement thin overlay, it is special
Levying and be: in step (3), the thickness of the SBS that described stickup high-performance polyester cloth or Fibergrass polyester mat are made is less than 2.5mm,
Width is 30～50cm.
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| CN105350421B (en) * | 2015-09-28 | 2017-10-17 | 北京城建道桥建设集团有限公司 | A kind of thin overlay construction method suitable for road surface medium-capital overhauling and preventive maintenance |
| CN105887611A (en) * | 2016-05-13 | 2016-08-24 | 重庆交通大学 | Thin-layer overlay construction method for thermal remediation of asphalt disease pavement |
| CN106592371A (en) * | 2016-12-16 | 2017-04-26 | 武汉理工大学 | Asphalt pavement capable of providing charging function for vehicles in driving process |
| CN106930167B (en) * | 2017-03-22 | 2019-03-26 | 泰州职业技术学院 | A kind of concrete debris regenerated aggregate warm-mixed asphalt thin overlay structure and its construction method |
| CN107012759A (en) * | 2017-05-02 | 2017-08-04 | 广西交科新材料科技有限责任公司 | Improve the surface functional layer and its construction method of Portland Cement Concrete Pavement Performance |
| CN107399930A (en) * | 2017-07-27 | 2017-11-28 | 四川宝利沥青有限公司 | The composite type modified pitch of strong bonding for rigid pavement |
| CN107337381B (en) * | 2017-08-09 | 2020-03-17 | 上海市市政规划设计研究院有限公司 | Small-particle-size open-graded asphalt mixture for ultrathin overlay |
| CN109293280A (en) * | 2018-09-08 | 2019-02-01 | 平湖市中建沥青混凝土工程有限公司 | A kind of bituminous concrete and its preparation process |
| CN110304865A (en) * | 2019-03-20 | 2019-10-08 | 上海应用技术大学 | Old cement concrete overlays repair materials and application method |
| CN110342857A (en) * | 2019-07-11 | 2019-10-18 | 河南省路嘉路桥股份有限公司 | A kind of highway engineering bituminous concrete and preparation method thereof |
| CN110331642A (en) * | 2019-07-13 | 2019-10-15 | 四川玖壹建设工程有限公司 | The municipal micro- cover preventive maintenance construction method of asphalt pavement warm mixing |
| CN110818350A (en) * | 2019-11-14 | 2020-02-21 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Application of copper tailings in concrete for roads |
| CN111233374B (en) * | 2020-01-20 | 2020-12-29 | 河北安恕朗晴环保设备有限公司 | Asphalt mastic macadam mixture using recycled fan blade waste as filler |
| CN112239981A (en) * | 2020-10-09 | 2021-01-19 | 周静 | Asphalt laying process for road construction |
| CN112343299A (en) * | 2020-10-29 | 2021-02-09 | 装先蜂(武汉)装饰工程有限公司 | Construction method for thin leveling of ground |
| CN114016347B (en) * | 2021-11-11 | 2023-04-28 | 重庆海聚道路材料有限公司 | Heat-insulating ultrathin wearing layer for road upper layer |
| 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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| KR100915977B1 (en) * | 2008-10-14 | 2009-09-10 | 김휘중 | Asphalt concrete solidified body using tailings and the manufacturing method thereof |
| KR20120051113A (en) * | 2010-11-12 | 2012-05-22 | 김동현 | Nature-friendly pavement method using waste coal tailings |
| CN102619157B (en) * | 2012-04-19 | 2015-05-20 | 招商局重庆交通科研设计院有限公司 | Method for repairing and constructing thin overlay of cement concrete road pavement |
| CN103833266B (en) * | 2014-01-10 | 2016-03-02 | 大连理工大学 | A kind of iron tailings sand asphalt |
| CN104294732B (en) * | 2014-10-20 | 2017-06-13 | 中交二公局东萌工程有限公司 | A kind of high-elastic viscous stress absorbed layer |
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