CN108487018A - Asphalt road surface by microwave heating restorative procedure based on surface layer preheating - Google Patents
Asphalt road surface by microwave heating restorative procedure based on surface layer preheating Download PDFInfo
- Publication number
- CN108487018A CN108487018A CN201810265413.0A CN201810265413A CN108487018A CN 108487018 A CN108487018 A CN 108487018A CN 201810265413 A CN201810265413 A CN 201810265413A CN 108487018 A CN108487018 A CN 108487018A
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- Prior art keywords
- road surface
- heating
- microwave
- asphalt
- surface layer
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
Abstract
The invention discloses a kind of asphalt road surface by microwave heating restorative procedure based on surface layer preheating, mainly solves the problems, such as that the prior art efficiency of heating surface is low, the heating process time is grown.Its implementation is：The asphalt concrete pavement heated will be needed to be divided into surface layer road surface and second layer road surface according to thickness first；Then, using hot wind or infrared or microwave mode, first time heating is carried out to surface layer road surface, heating temperature at 100 DEG C 130 DEG C, then by microwave heating to second layer road-surface heating to 130 DEG C or more；Finally, two layers of road surface is subjected to milling rake pine processing, while sprays regenerative agent, mixes new asphalt material, flattened on the circuit face that paves again again after being sufficiently mixed, complete road surface and repair.The present invention improves the efficiency of heating surface, shortens heating time, reduces rehabilitation cost, and green non-pollution, can be used for highway reparation and maintenance.
Description
Technical field
This method belongs to microwave technical field, more particularly to a kind of road-surface heating method, can be used for highway reparation with
The fields such as maintenance.
Background technology
With the economic fast development with science and technology, the high-grade expressway construction cause in China also achieves considerable hair
Exhibition, by the development and construction of more than ten years, Chinese Higher grade highway has occupied the first in the world on total kilometrage.High-grade height
Fast highway is usually using asphalt concrete material as level, and bituminous paving is natural environment is bad, transition load and frequently load
When, normal work damage is will produce, to form concave-convex pit slot, various horizontal and vertical cracks, lopsided deformation, spider web
Type cracking, gathers around phenomena such as packet, cleavage block at spill track.When these diseases occurs in road surface, such as handled not in time, it will
The overall structure of bituminous paving can be caused to be destroyed, if the state of affairs of leaving continues to develop, the degree of disease area and damage can be into one
Step becomes larger, and finally will cause road surface that can not be continuing with, and seriously affects the people's lives and property safety.Nowadays, the highway in China
Infrastructure is by based on construction, being changed into construction and laying equal stress on maintenance.Wherein, proposition and the practical problems of new method are conserved, are dropped
Low-maintenance technology and equipment cost problem improve the concern that the problems such as conserving efficiency and quality has been obtained for more and more people.
Currently, the research for bituminous paving heating technique both at home and abroad, mainly uses following several method：
1. open firing
Open firing is directly heated to bituminous paving by open fire, so that bituminous paving is softened, and then repaired
Road surface or the method for recycling pitch.This method is although simple to operation, but inefficiency, seriously polluted, not easy to control, and
Different degrees of damage can be generated to pitch.
2. infrared heating
Infrared heating is the method for the infrared heating bituminous paving generated in material surface burning using fuel.Due to red
Outside line is only 2-3 inches to the penetration power of bituminous concrete, therefore can in a relatively short period of time be softened asphalt material, then is passed through
It crosses the processes such as scarifying, levelling, compacting and repairing can be completed.The advantages of this method be it is simple and quick, it is environmentally protective.But the disadvantage is that：
Controllability is not high, and equipment is heavy, not easy to operate.
3. microwave heating
Microwave heating relative to open fire and it is infrared for, be a kind of completely new mode of heating.Microwave heating is based primarily upon electricity
The principle of magnetic wave near-field thermal radiation is powered by magnetron and generates electromagnetic wave, coupled inside cavity, will finally by antenna
On electromagenetic wave radiation to bituminous paving, using the penetrability of microwave, heating and softening processing is carried out to bituminous paving.Relative to open fire
And the mode of infrared heating, microwave heating mainly have the following advantages：Green pollution-free, heating uniformity is good, is convenient for
Control, the efficiency of heating surface increase.But only with the single heating mode of asphalt road surface by microwave heating, still there is heating
The process consuming time is longer, the relatively low problem of the efficiency of heating surface.
In conclusion during road-surface heating is repaired, not only to consider whether method is simple and convenient, and whether is heating
Uniformly, whether harmless to environment, it is also contemplated that whether used method can shorten heating time, if can improve and add
The factors such as the thermal efficiency.Therefore, there is the asphalt road surface by microwave heating restorative procedure based on surface layer preheating important engineering practice to anticipate
Justice.
Invention content
The purpose of the present invention is heating the deficiency of restorative procedure for existing bituminous paving, provide a kind of based on surface layer preheating
Asphalt road surface by microwave heating restorative procedure, with effectively reduce heating time, improve the efficiency of heating surface.
In order to achieve the above object, the technical solution adopted by the present invention is：
First, construction road surface is sampled on the spot and carries out Marshall experiment, judge the degree of aging of bituminous paving；When construction,
Electromagnetic shielding facility is placed around the road surface to be repaired, it would be desirable to which the asphalt concrete pavement of heating is divided into two layers, i.e., from upper
Surface layer road surface (1) and second layer road surface (2) are followed successively by under and；
Then, using hot wind or infrared or microwave mode, the first time heating of asphalt concrete pavement is carried out, i.e., by surface layer
Road surface (1) is heated to 100 DEG C -130 DEG C, and its temperature is kept to be not less than 100 DEG C, then carries out second of asphalt concrete pavement
Heating, i.e., penetrate into second layer road surface (2) to 130 DEG C or more by microwave heating, and it is in doughy state to make bituminous paving；
Finally, two layers of road surface is subjected to milling rake pine processing, keeps pavement temperature to be not less than 130 DEG C, while spraying regeneration
Agent mixes new asphalt material, and the road surface of heating and regenerative agent and new asphalt material are sufficiently mixed, and forms new mixture
It paves and is flattened on the face of circuit again again, complete road surface and repair.
Further, the asphalt material weight sampled on the spot is not less than 200g, and it is small that the time that sample is stood before testing is no less than 4
When, according to the experimental result that Marshall is tested, it can determine that the degree of aging of bituminous paving is short ageing or long-term ageing.
Further, described the asphalt concrete pavement that heats to be needed to be divided into two layers, be 2-3 inches by thickness pitch
Road surface divides surface layer road surface (1), the bituminous paving that thickness under the road surface of surface layer is 7-10 inches is divided second layer road surface (2), i.e.,
First time heating operation carries out on the surface that thickness is 2-3 inches, and second of heating operation is on the surface that thickness is 7-10 inches
It carries out.
Further, regenerative agent includes furfural oil, lubricating oil, machine oil, corn oil, and the content of sprinkling is heated asphalt material
The 6%-10% of proportion；The weight of the new pitch mixed is the 16%-35% of heated asphalt material.
Further, new mixture is paved again when being flattened on the face of circuit, 2 is successively carried out using 1 road roller
Secondary road surface at the uniform velocity flattens work, and rolling speed is no more than 5km/h, and pavement temperature when flattening for the first time is not less than 130 DEG C, the
Pavement temperature when secondary pressing is not less than 70 DEG C.
Compared with prior art, the present invention having the advantages that：
1. the present invention makes surface layer road surface after with initial temperature as a result of surface layer pre-add thermal technology, then using micro-
Wave heating second layer road surface, not only reduces heating time, and improve the efficiency of heating surface.
2 present invention are to be carried out under conditions of carrying out electromagnetic shielding, thus microwave heating is to asphalt road due to heating process
Greenbelt around face is almost harmless, will not generate environmentally harmful by-product, so entire heating process green ring
It protects pollution-free.
3. working procedure of the present invention is simple, corollary equipment is easy to get, and has not only saved human resources, but also reduce and repair
Multiple cost.
4. the present invention is mixed during reparation using the waste material and new pitch material and regenerative agent on old road surface
It mixes, whole process does not waste raw material, improves economic and social benefit.
Description of the drawings
Fig. 1 is that asphalt concrete pavement structure is layered schematic diagram.
Fig. 2 is the implementation flow chart of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and case is embodied, the present invention is furture elucidated, it should be understood that these examples are merely to illustrate
It the present invention rather than limits the scope of the invention, after having read the present invention, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
With reference to Fig. 2, specific implementation of the invention provides following three kinds of embodiments：
Embodiment 1 repairs road surface with hot wind with the mode of heating that microwave is combined.
Step 1, road surface is layered
Construction road surface is sampled on the spot, sample carries out Marshall experiment after placing 4 hours, judges the aging journey of bituminous paving
Degree；When construction, the setting electromagnetic shielding facility around the road surface to be repaired, it would be desirable to which the asphalt concrete pavement of heating is divided into two
Layer, i.e., be followed successively by surface layer road surface and second layer road surface from top to bottom.As shown in Figure 1, the bituminous paving that thickness is 2 inches is divided
The bituminous paving that thickness under the road surface of surface layer is 9.5 inches is divided second layer road surface 2, the pitch in two layers of road surface by surface layer road surface 1
Gather materials is 3.
Step 2, road surface leveled heating
Using Hot-blast Heating mode, first time heating is carried out to asphalt concrete pavement, i.e., is added using 1 heated air circulation type
Heat engine, the temperature that setting heater heats are 100 DEG C, and with hot air circulation heating machine, back and forth traveling heats on road surface, by surface layer
Road-surface heating continues to use microwave heating to rated temperature, and under conditions of keeping the temperature on surface layer road surface to be not less than 100 DEG C
Mode carries out second to asphalt concrete pavement and heats, that is, 1 microwave heating working machine, setting heater is used to heat
Temperature is 130 DEG C, and with microwave heating machine, back and forth traveling heats on road surface, by microwave spoke by second layer road-surface heating to 130
℃.Hot air circulation microwave heating machine and microwave heating machine this 2 heaters in tandem, are divided into 1.2 meters, and every heater
Speed be 5m/min.
Step 3, it stirs, pave and pavement compaction
Milling rake pine processing is carried out to two layers of road surface after heating, and pavement temperature is kept to be not less than 130 DEG C, according to Marshall
The result of experiment judges the degree of aging of bituminous paving, if result is short ageing, the new pitch material weight mixed is road
By the 18% of heating Bituminous concrete surface material, the lubrication oil content of sprinkling is road surface by the 7% of heating Bituminous concrete surface material proportion in face；If
As a result it is long-term ageing, the new pitch material weight mixed is road surface by the 33% of heating Bituminous concrete surface material, the lubricating oil of sprinkling
Content is road surface by the 9% of heating Bituminous concrete surface material proportion；
The road surface of heating and regenerative agent and new asphalt material are sufficiently mixed, new mixture is formed and paves back again again
It is flattened on road surface；
When pressing, 2 road surfaces are successively carried out using 1 road roller and at the uniform velocity flatten work, rolling speed is no more than 5km/h,
And pavement temperature when pressing for the first time is not less than 130 DEG C, pavement temperature when flattening for the second time is not less than 70 DEG C, i.e. completion pair
The repair on road surface；
When pavement temperature is less than 50 DEG C, you can reopen traffic.
Embodiment 2 repairs road surface with the infrared mode of heating being combined with microwave.
Step 1, road surface layering
Construction road surface is sampled on the spot, sample carries out Marshall experiment after placing 4 hours, judges the aging journey of bituminous paving
Degree；When construction, the setting electromagnetic shielding facility around the road surface to be repaired, it would be desirable to which the asphalt concrete pavement of heating is divided into two
Layer, i.e., be followed successively by surface layer road surface and second layer road surface from top to bottom.As shown in Figure 1, the bituminous paving that thickness is 2.5 inches is drawn
Divide surface layer road surface 1, the bituminous paving that thickness under the road surface of surface layer is 9 inches is divided into second layer road surface 2, the pitch in two layers of road surface
Gather materials is 3.
Step 2, road surface leveled heating
Using 1 infrared-type heater, the temperature that setting heater heats is 120 DEG C, is existed with infrared-type heater
Surface layer road-surface heating to rated temperature is carried out first time heating by back and forth traveling heating on road surface to asphalt concrete pavement, and
Under conditions of keeping the temperature on surface layer road surface to be not less than 100 DEG C, continue to use microwave heating, to asphalt concrete pavement
It carries out second to heat, that is, uses 1 microwave heating working machine, the temperature that setting heater heats is 140 °C, uses microwave heating
Machine back and forth traveling heating on road surface, by microwave radiation by second layer road-surface heating to rated temperature.Infrared-type heater
In tandem with microwave heating machine this 2 heaters, it is divided into 1 meter, and the speed of every heater is 4m/min.
Step 3 stirs, paves and pavement compaction
The specific implementation of this step is identical as the step 3 of embodiment 1.
Embodiment 3 repairs road surface with the mode of heating that 2 microwave operational machines are combined.
Step A, road surface layering
Construction road surface is sampled on the spot, sample carries out Marshall experiment after placing 4 hours, judges the aging journey of bituminous paving
Degree；When construction, the setting electromagnetic shielding facility around the road surface to be repaired, it would be desirable to which the asphalt concrete pavement of heating is divided into two
Layer, i.e., be followed successively by surface layer road surface and second layer road surface from top to bottom.As shown in Figure 1, the bituminous paving that thickness is 3 inches is divided
The bituminous paving that thickness under the road surface of surface layer is 8.5 inches is divided second layer road surface 2, the pitch in two layers of road surface by surface layer road surface 1
Gather materials is 3.
Step B, road surface leveled heating
Using microwave heating, first time heating is carried out to asphalt concrete pavement, that is, uses 1 microwave heating to work
Machine, the temperature that setting heater heats are 130 DEG C, and with microwave heating working machine, back and forth traveling heats on road surface, by surface layer road
Face is heated to rated temperature, and under conditions of keeping the temperature on surface layer road surface to be not less than 100 DEG C, continues to use microwave heating side
Formula carries out second to asphalt concrete pavement and heats, i.e., 1 microwave heating working machine, setting heater is in addition used to heat
Temperature be 135 DEG C, with microwave heating machine on road surface back and forth traveling heat, by microwave radiation by second layer road-surface heating extremely
130℃.2 microwave heating machines in tandem, are divided into 0.8 meter, and the speed of every heater is 3m/min.
Step C stirs, paves and pavement compaction
The specific implementation of this step is identical as the step 3 of embodiment 1.
Above description is only several specific examples of the present invention, does not constitute any limitation of the invention, it is clear that for
It, all may be without departing substantially from the principle of the invention, structure after having understood the principle of the invention and content for one of skill in the art
In the case of, various modifications in form and details and change are carried out, such as spray regenerative agent, can not only the present invention be used to use
Lubricating oil, furfural oil, machine oil, corn oil can also be used, but these modifications and variations based on inventive concept still exist
Within the claims of the present invention.
Claims (10)
1. the asphalt road surface by microwave heating restorative procedure based on surface layer preheating, it is characterised in that：
First, progress Marshall experiment sample on the spot to construction road surface, judge the degree of aging of bituminous paving, when construction,
Electromagnetic shielding facility is placed around the road surface of reparation, it would be desirable to which the asphalt concrete pavement of heating is divided into two layers, i.e., from top to bottom
It is followed successively by surface layer road surface (1) and second layer road surface (2)；
Then, using hot wind or infrared or microwave mode, the first time heating of asphalt concrete pavement is carried out, i.e., by surface layer road surface
(1) 100 DEG C -130 DEG C are heated to, and its temperature is kept to be not less than 100 DEG C, then carries out adding for the second time for asphalt concrete pavement
Heat penetrates into second layer road surface (2) to 130 DEG C or more by microwave heating, it is in doughy state to make bituminous paving；
Finally, two layers of road surface is subjected to milling rake pine processing, keeps pavement temperature to be not less than 130 DEG C, while spraying regenerative agent, mixing
New asphalt material is mixed, the road surface of heating and regenerative agent and new asphalt material are sufficiently mixed, new mixture is formed and weighs again
It is flattened on the new circuit face that paves, completes road surface and repair.
2. according to the method described in claim 1, it is characterized in that, the asphalt material weight sampled on the spot is not less than 200g, in fact
The time that sample is stood before testing is no less than 4 hours, according to the experimental result that Marshall is tested, can determine that the aging journey of bituminous paving
Degree is short ageing or long-term ageing.
3. according to the method described in claim 1, it is characterized in that, the asphalt concrete pavement that heats will be needed to be divided into two layers,
It is that the bituminous paving for being 2-3 inches by thickness divides surface layer road surface (1), the asphalt road for being 7-10 inches by thickness under the road surface of surface layer
Face divides second layer road surface (2), i.e., first time heating operation carries out on the surface that thickness is 2-3 inches, second of heating operation
It is carried out on the surface that thickness is 7-10 inches.
4. it is with 1 heat according to the method described in claim 1, it is characterized in that, using hot wind to surface layer road surface (1) heating
Wind circulating heater carries out, that is, it is 100 DEG C -130 DEG C that heater heating temperature, which is arranged, is back and forth travelled on road surface with heater
Heating.
5. it is to use 1 according to the method described in claim 1, it is characterized in that, using infrared to surface layer road surface (1) heating
Infrared-type heater carries out, and the temperature that setting heater heats is 100 DEG C -130 DEG C, is back and forth travelled on road surface with heater
Heating.
6. according to the method described in claim 1, it is characterized in that, using microwave to surface layer road surface (1) heat, be with 1 it is micro-
Wave heating working machine carries out, and setting working machine heating temperature is 100 DEG C -130 DEG C, and with working machine, back and forth traveling adds on road surface
Heat.
7. it is to use 1 according to the method described in claim 1, it is characterized in that, using microwave to second layer road surface (2) heating
Platform microwave heating working machine carry out, be arranged working machine temperature be 130 DEG C -150 DEG C, by this microwave heating working machine be placed in
It is divided between the working machine on previous heated surface layer road surface at 0.8-1.2 meters of position, and the speed of every heater is 2-5m/
Min makes the back and forth traveling heating on road surface simultaneously of two working machines.
8. according to the method described in claim 1, it is characterized in that, the weight of the new pitch mixed is heated asphalt material
16%-35%.
9. according to the method described in claim 1, it is characterized in that, regenerative agent includes furfural oil, lubricating oil, machine oil, corn oil,
Its content sprayed is the 6%-10% of heated asphalt material proportion.
10. according to the method described in claim 1, being pressed on the face of circuit it is characterized in that, new mixture is paved again
Usually, 2 road surfaces are successively carried out using 1 road roller and at the uniform velocity flatten work, and rolling speed is no more than 5km/h, and presses for the first time
Pavement temperature usually is not less than 130 DEG C, and pavement temperature when flattening for the second time is not less than 70 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265413.0A CN108487018A (en) | 2018-03-28 | 2018-03-28 | Asphalt road surface by microwave heating restorative procedure based on surface layer preheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810265413.0A CN108487018A (en) | 2018-03-28 | 2018-03-28 | Asphalt road surface by microwave heating restorative procedure based on surface layer preheating |
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| CN108487018A true CN108487018A (en) | 2018-09-04 |
Family
ID=63316592
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| CN201810265413.0A Pending CN108487018A (en) | 2018-03-28 | 2018-03-28 | Asphalt road surface by microwave heating restorative procedure based on surface layer preheating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881569A (en) * | 2018-12-14 | 2019-06-14 | 香港英达生态科技投资有限公司 | A kind of asphalt pavement pit repairing method |
| CN113515153A (en) * | 2021-07-23 | 2021-10-19 | 山东交通学院 | Control method for heating power and running speed in-place heat regeneration construction |
| CN114922035A (en) * | 2022-04-22 | 2022-08-19 | 浙江工业大学 | Construction method for repairing pits of asphalt pavement by microwave heating and rapid regeneration of old materials |
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| CN101058970A (en) * | 2007-04-13 | 2007-10-24 | 乔子君 | Microwave heating device for asphalt pavement and repairing machine thereof |
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