CN104762863A - 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 bituminous mixture and preparation method thereof and construction method, be specifically related to a kind of by copper tailing recycle and be applied to bituminous mixture of cement concrete pavement thin overlay and preparation method thereof and construction method, belong to building material technical field used in highway construction.
Background technology
Asphalt concrete pavement is a kind of flexible high class pavement, repairs Paving Bituminous Concrete surface layer fairly simple for old asphalt pavement, only needs get well Disease Processing and carries out the overlap joint operation of new-old pavement, just entirety can give play to the effect of asphalt concrete pavement.
In contrast, cement concrete pavement is a kind of rigidity high class pavement, under the long term of natural environment and vehicular load, add the defect himself existed, road surface, once breakage, is difficult to repair, and under the effect of to concentrate at stress, damaged road surface is easy to expansion rapidly and comes.In order to reduce the maintenance cost of breakage on cement concrete pavement section, and avoid or reduce cement concrete pavement being damaged prematurely, we are necessary to take some to repair and preventive maintenance measure.Domestic and international research shows, the measure the most feasible to the transformation of cement concrete pavement is that Paving Bituminous Concrete surface layer makes wearing layer on the basis on original road surface.But for Laying Asphalt Surface Course on Cement Concrete Pavement more complicated, at present, China's application of bituminous mixture thin overlay technology on flexible pavement is comparatively ripe, but the application on cement concrete pavement is also fewer.China " highway cement concrete pavement design specifications " (JTG D40-2011) only provides the suggestion of some directiveness to the asphalt overlay on Old cement concrete: the measure that should slow down reflection crack according to reasonable selections such as temperature, load, rigid pavement supporting capacity, joint slab abilities, comprises the thickness increasing asphalt overlay; The modifier such as adding of fiber and rubber in bituminous mixture; Stress absorbing layer or geotextile interlayer etc. are set in concrete slab end face or overlay.The nominal maximum particle diameter that the thickness of asphalt overlay should take into account bituminous mixture matches and the requirement that slows down reflection crack is determined.The minimum thickness of speedway and Class I highway is preferably 100mm, and the minimum thickness of other standard highways is preferably 80mm, and this thickness not only increases the comprehensive cost on road surface, and some location improves grade elevation and can affect road equipment.Therefore, if thickness can be down to about 2cm, significantly maintenance and precuring cost can be reduced.But only the overlay thickness of 2cm brings great difficulty, especially in microthermal climate can to the compacting of compound.
In addition, mine tailing is the discarded object after ore dressing, is the chief component of industrial solid castoff.At present, China's mine tailing amount is up to more than 10,000,000,000 tons, discharge mine tailing amount year up to 500,000,000 more than t, wherein copper tailing account for greatly, and the comprehensive utilization of tailing rate of China is very low, and a large amount of mine tailings is piled up for a long time and not only caused serious pollution to air and water and soil, and occupy a large amount of agricultural land, if add Tailings Dam management, design and be not good at, accident of very easily decaying, causes casualties.In addition, along with the development of builing industry and Highway Cause, day by day increase the demand of sandstone material, but natural sandstone material is non-renewable resources in a kind of short time, cause sand and stone resources in short supply, price rises steadily.Mine tailing wide variety, complicated components, all kinds of mine tailing utilizability is also not quite similar, often kind of mine tailing is due to component difference, its hydrophilic coefficient, index of plasticity and add the character such as thermostability and also distinguish to some extent, therefore need just can obtain fully effective utilization through large quantifier elimination and test for different mine tailings.
At present, only the fine aggregate that iron tailings sand replaces in bituminous mixture uses by the display of some data, also not having data to show can be applied in bituminous mixture by copper tailing, especially be applied in the filler of cement concrete pavement thin overlay bituminous mixture, it requires higher for raw material.Therefore, how to be applied in the bituminous mixture of cement concrete pavement thin overlay by copper tailing, how the thickness of thinning bituminous mixture, meet the compacting requirement of compound, the comprehensive cost that can also reduce road surface is a difficult problem urgently to be resolved hurrily at present simultaneously.
Summary of the invention
Goal of the invention: the present invention first object is to provide and a kind ofly integrates the bituminous mixture recycling copper tailing, reparation and precuring cement concrete pavement;
The second object of the present invention is to provide the preparation method of this bituminous mixture;
The third object of the present invention is to provide the construction method of this bituminous mixture.
Technical scheme: bituminous mixture of the present invention, comprise mineral aggregate, pitch, fiber stabilizer and additive, wherein, described mineral aggregate by gather materials and filler form, gather materials for basalt, diabase or limestone, filler is copper tailing powder, and gathering materials with the percentage by weight of filler is 96 ~ 94%:4 ~ 6%; Described pitch is polymer modified asphalt or heavy traffic plain asphalt, and 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 the percentage by weight that pitch accounts for mineral aggregate; Described fiber stabilizer is polyester fiber or lignin fibre, and its weight is 0.1 ~ 0.3% of mineral aggregate gross weight; Described additive is composite synergist, and its weight is 0.3 ~ 0.6% of mineral aggregate gross weight.
Said additive is mixed by composite synergist and warm-mixing agent, and wherein, the weight of composite synergist and warm-mixing agent respectively accounts for 0.3 ~ 0.6% of mineral aggregate gross weight.The nominal maximum aggregate size of bituminous mixture is 6.7mm.
The grading limit of mineral aggregate is:
The preparation method of the bituminous mixture for cement concrete pavement thin overlay of the present invention, comprises the steps:
For polymer modified asphalt, in advance mineral aggregate is 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, fineness and grating requirement is met by copper tailing through grinding screening as the copper tailing powder of filler in mineral aggregate; Then polymer modified asphalt wet-mixing 50 ~ 55s is added, 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 is heated to 155 ~ 165 DEG C; Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10 ~ 15s, wherein, fineness and grating requirement is met by copper tailing through grinding screening as the copper tailing powder of filler in mineral aggregate; Then heavy traffic plain asphalt wet-mixing 50 ~ 55s is added, last discharging to control drop temperature be 160 ~ 170 DEG C.
The construction method of the bituminous mixture for cement concrete pavement thin overlay of the present invention, comprises the steps:
(1) according to former cement concrete pavement situation, pretreatment is carried out to it;
(2) road surface is cleaned;
(3) to the SBS that crack place stickup high-performance polyester cloth or the Fibergrass polyester mat on the road surface after cleaning are made;
(4) to the road surface spraying high strength modified emulsifying asphalt sticking layer oil after patch;
(5) pave successively after the complete breakdown of emulsion of mulseal in high strength modified emulsifying asphalt sticking layer oil and rolled asphalt compound, described bituminous mixture is layed in cement concrete road surface 1.5 ~ 2.5cm, wherein, paving material is not less than 130 DEG C, the initial temperature rolled is not less than 120 DEG C, the finishing temperature rolled is not less than 90 DEG C, and the temperature rolling rear road surface can open gradually traffic lower than when 50 DEG C.
Wherein, in step (1), described pretreatment comprises leveling process or joint treatment, and wherein, described leveling process is the planeness first measuring road surface, and the part milling then exceeded on road surface is fallen, and sunken part bituminous mixture is filled up; Described joint treatment is that former cement concrete pavement is extended to new road surface with the mode gradual change of oblique triangle.
In step (2), described cleaning road surface is that road pavement is first cleaned with sprinkling truck, then cleans with powerful brusher, then rinses with sprinkling truck, finally blow clean with hair-dryer.
In step (4), the thickness of described stickup is no more than 2.5mm, and width is 30 ~ 50cm.
Invention mechanism: the present invention is mainly through adjusting the mix-design of the Gradation Optimization compound of mineral aggregate, use replacing filler after the copper tailing grinding of recycling, the additive simultaneously mixed can increase by 60 DEG C of dynamic viscosities, improve high-temperature behavior, reduce high temperature viscosity and can compacting temperature, improve construction workability and extend the engineering time, the fiber stabilizer mixed can improve high-temperature stability, low-temperature cracking-resistance, anti-fatigue performance and water stability again, add the cementation of pitch, entirety has been given play to good performance.
Gather materials and be divided into coarse aggregate and fine aggregate, filler just refers to the fine powder material of breeze class usually; The especially coarse aggregate that gathers materials has been more skeleton function, and fine aggregate is then filled in embedded squeezing in coarse aggregate and piles up; Breeze be in order to fill thickness gather materials between space, to mineral aggregate grating require higher.
Beneficial effect: the present invention compared with prior art, its remarkable advantage is: bituminous mixture of the present invention can recycle copper tailing, and the filler replaced in breeze after copper tailing grinding is used, because copper tailing powder is cheap and easy to get, not only reduce the cost of bituminous mixture, the performance of compound can also be improved, decrease pollution simultaneously, saved resource, its comprehensive reutilization has good economic benefit and social benefit.Excellent and the easily compacting of this performance of asphalt mixture, add and to be layered on cement concrete pavement only 1.5 ~ 2.5cm and just can to realize the abrasion function of the asphalt concrete pavement of current 5 ~ 7cm, damaged road surface can be repaired rapidly after construction, recover planarization and the skid resistance on road surface, improve pavement quality, extend the application life on road surface, reduce noise, improve road-ability and safety, can also precuring road surface, do not affect road equipment, reducing the construction costs, energy conservation and resource, reduce the impact etc. on environment and facility.In addition, bituminous mixture preparation method of the present invention and construction method simple, easily operate, practical.
Detailed description of the invention:
Below technical scheme of the present invention is described further.
Embodiment 1:
(1) component:
Gather materials: basalt, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry Co., Ltd;
Filler: copper tailing powder, can be selected from locality or periphery mining site;
Wherein, gathering materials with the weight ratio of filler is 96%:4%, conveniently describes, and will gather materials here is referred to as " mineral aggregate " with filler, and mineral aggregate gradation is see table 1.
Table 1 mineral aggregate gradation
Pitch: SBS polymer modified asphalt, its bitumen aggregate ratio is 5.8%, and wherein, bitumen aggregate ratio is pitch and the ratio of mineral aggregate weight, and this pitch is purchased from Jiangshu Baoli Pitch Co., Ltd..
Fiber stabilizer: polyester fiber, volume is 0.2% of mineral aggregate weight, purchased from Changzhou Zhu Wei constructional materials Co., Ltd.
Additive: mixed by composite synergist and warm-mixing agent, volume is 0.3% of mineral aggregate weight, and composite synergist is purchased from Shanghai Honeywell Co., Ltd, and warm-mixing agent is purchased from Changzhou Zhu Wei constructional materials Co., Ltd
What deserves to be explained is, composite synergist here works effects such as having raising high-temperature stability, low-temperature cracking-resistance, anti-rut behavior and anti-fatigue performance; Warm-mixing agent play have reduce high temperature viscosity and can compacting temperature, improve construction workability and extend the effect such as engineering time; So both effects are not identical, and collaborative result of use is better.
The performance verification of bituminous mixture is as shown in table 2, and its performance can meet technical requirements well.
Table 2 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.15 | ≤0.2 |
| To 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: first set Target Mixture Ratio according to marshall' mechanic characteristic value and carry out Marshall compaction test, then according to screening in hot material store and density test, production mix proportion is debugged, thus determine optimum oil-stone ratio, last according to optimum oil-stone ratio and selected grating, the performance of compound is verified, draws final production mix proportion conclusion.
(2) preparation method
Carry out as follows: first mineral aggregate is heated to 180 ~ 190 DEG C, asphalt heating is to 165 ~ 175 DEG C, then will gather materials, filler, fiber stabilizer and additive mixing dry mixing 10 ~ 15s, then add pitch wet-mixing 50 ~ 55s, drop temperature is 170 ~ 180 DEG C.
Relevant parameter in above-mentioned steps draws according to the characteristic research of raw material various in bituminous mixture and proportioning thereof.
(3) construction method and Performance Detection
The construction of bituminous mixture is carried out as follows: (1) carries out pretreatment according to former cement concrete pavement situation to it; (2) road surface is cleaned; (3) to the SBS that crack place stickup high-performance polyester cloth or the Fibergrass polyester mat on the road surface after cleaning are made; (4) to the road surface spraying high strength modified emulsifying asphalt sticking layer oil after patch; (5) pave successively after the complete breakdown of emulsion of mulseal in high strength modified emulsifying asphalt sticking layer oil and rolled asphalt compound, described bituminous mixture is made to be layed in cement concrete road surface 1.5 ~ 2.5cm, wherein, paving material is not less than 130 DEG C, the initial temperature rolled is not less than 120 DEG C, the finishing temperature rolled is not less than 90 DEG C, and the temperature rolling rear road surface can open gradually traffic lower than when 50 DEG C.
Pretreatment comprises leveling process or joint treatment, and wherein, leveling process first measures surface evenness, and then high part milling is fallen, and low part bituminous mixture is filled up.Joint treatment is the joint area (such as seam) with milling machine process the old and new road surface, to prevent face, old road from occurring crack, and former cement concrete pavement is extended to new road surface with the mode gradual change of oblique triangle.Seam for road junction, roadside first to pave or hot seam paves with carrying out main road after cutting machine process again.The height of also tackling road surface around well lid in boundary of works area or collecting well before construction adjusts, and actual adjustment height should be considered corresponding with face, road Transverse longitudinal gradient around well lid or collecting well, reduces after paving and occurs with new road not in conplane situation.Have serious check crack for former cement concrete pavement, horizontal, longitudinal crevasse, the disease palpus advanced processing such as purt slurry, to reach the ideal effect of expection.
Road cleaning must by following procedure operation: first with sprinkling truck cleaning, then clean with powerful brusher, then rinse with sprinkling truck, last hair-dryer blows clean.Completely after clean, the patch of cleaning at road surface spraying high viscosity modified emulsifying asphalt sticking layer oil, to evenly put in place in sprinkling process, local situation too much or very little can not be there is, thus affect pavement quality, meanwhile, next step construction can just be carried out after the high viscosity modified emulsifying asphalt sticking layer oil of sprinkling need wait until the complete breakdown of emulsion of mulseal.
The SBS that in cement concrete pavement, crack treatment material should select that tensile strength is high, the high-performance polyester cloth of resistance to ag(e)ing and good waterproof performance or Fibergrass polyester mat are made, its thickness can not more than 2.5mm, width is preferably 30 ~ 50cm, and construction is pasted must firmly, and be not moved deformation and curling.
Before paving, machine spreading position white line is released, determine the order that paves, reduce constuction joint.
Thin overlay should not be constructed in microthermal climate.As needed construction, suitably should improve the temperature of dispatching from the factory of compound, and on transport vehicle, carrying out tight covering and heat insulating measure, to pave and compacting should be carried out between 9:00am to 4:00pm, accomplish fast discharging, pave and roll soon soon.Need before paving to clear up and preheating bituminous concrete paver, reach more than 120 DEG C in temperature and just can pave.When paving, paver should slowly, evenly, incessantly pave.Before adopting the non-compacting of compound of machine spreading, constructor must not enter and trample.Generally hand finish must not be adopted.
Bituminous mixture is layed in certain cement concrete pavement 1.5 ~ 2.0cm, after testing, every pavement technique index meets designing requirement.
Embodiment 2
(1) component:
Gather materials: limestone, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry Co., Ltd;
Filler: copper tailing powder, can be selected from locality or periphery mining site;
Wherein, gathering materials with the weight ratio of filler is 95%:5%;
Mineral aggregate gradation is see table 3
Table 3 mineral aggregate gradation
Pitch: heavy traffic 70#A level pitch, its bitumen aggregate ratio is 6.1%, purchased from Jiangsu Zhong Youxingneng pitch Co., Ltd.
Fiber stabilizer: lignin fibre, volume is 0.3% of mineral aggregate weight, purchased from Changzhou Zhu Wei constructional materials Co., Ltd.
Additive: mixed by composite synergist and warm-mixing agent, the former volume is 0.6% of mineral aggregate quality, the latter's volume is 0.4% of mineral aggregate quality, and composite synergist is purchased from Shanghai Honeywell Co., Ltd, and warm-mixing agent is purchased from Changzhou Zhu Wei constructional materials Co., Ltd.
Performance of asphalt mixture checking is as shown in table 4, and its performance can meet technical requirements.
Table 4 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| To 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 is heated to 170 ~ 180 DEG C, asphalt heating, to 155 ~ 165 DEG C, then will to gather materials, filler, fiber stabilizer and additive mixing dry mixing 10 ~ 15s, and then add pitch 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.
Bituminous mixture is layed in certain cement concrete pavement 2.0 ~ 2.5cm, after testing, every pavement technique index meets designing requirement.
Embodiment 3
(1) component:
Gather materials: diabase, nominal maximum aggregate size is 6.7mm, purchased from Jiangsu Xing Yuan mining industry Co., Ltd;
Filler: copper tailing powder, can be selected from locality or periphery mining site;
Wherein, gathering materials with the weight ratio of filler is 96%:4%;
Mineral aggregate gradation is see table 5
Table 5 mineral aggregate gradation
Pitch: SBS polymer modified asphalt pitch, its bitumen aggregate ratio is 5.6%, purchased from Jiangshu Baoli Pitch Co., Ltd..
Fiber stabilizer: polyester fiber, volume is 0.15% of mineral aggregate weight, purchased from Changzhou Zhu Wei constructional materials Co., Ltd.
Additive: composite synergist, volume is 0.5% of mineral aggregate quality, and this composite synergist is purchased from Shanghai Honeywell Co., Ltd.Herein without warm-mixing agent, be because temperature is higher, also can preferably by bituminous mixture laying compacting without warm-mixing agent.
Performance of asphalt mixture checking is as shown in table 6, and its performance can meet technical requirements.
Table 6 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.16 | ≤0.2 |
| To 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.
Bituminous mixture is layed in certain cement concrete pavement 2.0 ~ 2.5cm, after testing, every pavement technique index meets designing requirement.
Embodiment 4
(1) component:
Substantially identical with embodiment 1 component, difference is:
Pitch: SBS polymer modified asphalt, its bitumen aggregate ratio is 6.0%.
Fiber stabilizer: polyester fiber, volume is 0.25% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are 0.6% of mineral aggregate quality.
Mineral aggregate gradation is see table 7
Table 7 mineral aggregate gradation
Performance of asphalt mixture checking is as shown in table 8, and its performance can well meet technical requirements.
Table 8 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.13 | ≤0.2 |
| To 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.
Bituminous mixture is layed in certain cement concrete pavement 1.5 ~ 2.0cm, after testing, every pavement technique index meets designing requirement.
Embodiment 5
(2) component:
Substantially identical with embodiment 2 component, difference is:
Gathering materials with the weight ratio of filler is 95.5%:4.5%
Pitch: heavy traffic 70#A level pitch, its bitumen aggregate ratio is 5.9%.
Fiber stabilizer: polyester fiber, volume is 0.2% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are 0.6% of mineral aggregate quality.
Mineral aggregate gradation is see table 9
Table 9 mineral aggregate gradation
Performance of asphalt mixture checking is as shown in table 10, and its performance can meet technical requirements.
Table 10 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| To 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.
Bituminous mixture is layed in certain cement concrete pavement 2.0 ~ 2.5cm, after testing, every pavement technique index meets designing requirement.
Embodiment 6
(3) component:
Substantially identical with embodiment 3 component, difference is:
Pitch: SBS polymer modified asphalt, its bitumen aggregate ratio is 5.8%.
Fiber stabilizer: polyester fiber, volume is 0.25% of mineral aggregate weight.
Additive: mixed by composite synergist and warm-mixing agent, both volumes are 0.4% of mineral aggregate quality.
Mineral aggregate gradation is see table 11
Table 11 mineral aggregate gradation
Performance of asphalt mixture checking is as shown in table 12, and its performance can meet technical requirements.
Table 12 Marshall Test result
| Test index | Result of the test | Technical requirements |
| Leakage analysis losing (%) | 0.18 | ≤0.2 |
| To 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.
Bituminous mixture is layed in certain cement concrete pavement 2.0 ~ 2.5cm, after testing, every pavement technique index meets designing requirement.
Claims (9)
1. the bituminous mixture for cement concrete pavement thin overlay, it is characterized in that: comprise mineral aggregate, pitch, fiber stabilizer and additive, wherein, described mineral aggregate by gather materials and filler form, gather materials for basalt, diabase or limestone, filler is copper tailing powder, and gathering materials with the percentage by weight of filler is 96 ~ 94%:4 ~ 6%; Described pitch is polymer modified asphalt or heavy traffic plain asphalt, and 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 the percentage by weight that pitch accounts for mineral aggregate; Described fiber stabilizer is polyester fiber or lignin fibre, and its weight is 0.1 ~ 0.3% of mineral aggregate gross weight; Described additive is composite synergist, and its weight is 0.3 ~ 0.6% of mineral aggregate gross weight.
2. according to claim 1 for the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: described additive is mixed by composite synergist and warm-mixing agent, wherein, the weight of composite synergist and warm-mixing agent respectively accounts for 0.3 ~ 0.6% of mineral aggregate gross weight.
3. according to claim 1 or 2 for the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: the nominal maximum aggregate size of described bituminous mixture is 6.7mm.
4. according to claim 1 or 2 for the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: the grading limit of described mineral aggregate is:
5., according to claim 1 for the preparation method of the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that comprising the steps:
For polymer modified asphalt, in advance mineral aggregate is 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, be met after fineness and grating require by copper tailing to use after grinding sieves as the copper tailing powder of filler in mineral aggregate; Then polymer modified asphalt wet-mixing 50 ~ 55s is added, 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 is heated to 155 ~ 165 DEG C; Then by mineral aggregate, fiber stabilizer and additive mixing dry mixing 10 ~ 15s, wherein, be met after fineness and grating require by copper tailing to use after grinding sieves as the copper tailing powder of filler in mineral aggregate; Then heavy traffic plain asphalt wet-mixing 50 ~ 55s is added, last discharging to control drop temperature be 160 ~ 170 DEG C.
6., according to claim 1 for the construction method of the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that comprising the steps:
(1) according to former cement concrete pavement situation, pretreatment is carried out to it;
(2) road surface is cleaned;
(3) to the SBS that crack place stickup high-performance polyester cloth or the Fibergrass polyester mat on the road surface after cleaning are made;
(4) to the road surface spraying high strength modified emulsifying asphalt sticking layer oil after patch;
(5) pave successively after the complete breakdown of emulsion of mulseal in high strength modified emulsifying asphalt sticking layer oil and rolled asphalt compound, described bituminous mixture is layed in cement concrete road surface 1.5 ~ 2.5cm, wherein, paving material is not less than 130 DEG C, the initial temperature rolled is not less than 120 DEG C, the finishing temperature rolled is not less than 90 DEG C, and the temperature rolling rear road surface can open gradually traffic lower than when 50 DEG C.
7. according to claim 6 for the construction method of the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: in step (1), described pretreatment comprises leveling process or joint treatment, wherein, described leveling process is the planeness first measuring road surface, then the part milling that road surface exceeds fallen, the described bituminous mixture of sunken part is filled up; Described joint treatment is that former cement concrete pavement is extended to new road surface with the mode gradual change of oblique triangle.
8. according to claim 6 for the construction method of the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: in step (2), described cleaning road surface is that road pavement is first cleaned with sprinkling truck, then clean with powerful brusher, rinse with sprinkling truck again, finally blow clean with hair-dryer.
9. according to claim 6 for the construction method of the bituminous mixture of cement concrete pavement thin overlay, it is characterized in that: in step (3), the thickness of the SBS that described stickup high-performance polyester cloth or Fibergrass polyester mat are made is no more than 2.5mm, and width is 30 ~ 50cm.
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| 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 |
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| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
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| 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 |
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| 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 |
| CN111233374A (en) * | 2020-01-20 | 2020-06-05 | 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 |
| CN114016347A (en) * | 2021-11-11 | 2022-02-08 | 重庆海聚道路材料有限公司 | Heat-insulating ultra-thin wearing layer for road upper layer |
| CN114180886A (en) * | 2021-12-24 | 2022-03-15 | 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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| CN105350421A (en) * | 2015-09-28 | 2016-02-24 | 北京城建道桥建设集团有限公司 | Thin layer overlaying surface construction method suitable for pavement overhaul and intermediate maintenance and preventive conservation |
| 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 |
| CN106930167A (en) * | 2017-03-22 | 2017-07-07 | 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 |
| 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 |
| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
| 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 |
| CN111233374A (en) * | 2020-01-20 | 2020-06-05 | 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 |
| CN114016347A (en) * | 2021-11-11 | 2022-02-08 | 重庆海聚道路材料有限公司 | Heat-insulating ultra-thin wearing layer for road upper layer |
| CN114180886A (en) * | 2021-12-24 | 2022-03-15 | 上海浦东路桥(集团)有限公司 | Self-adhesive asphalt concrete and preparation method and construction process thereof |
| 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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