CN117758572A - Winter asphalt road construction asphalt mixture temperature control method - Google Patents
Winter asphalt road construction asphalt mixture temperature control method Download PDFInfo
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- CN117758572A CN117758572A CN202410006056.1A CN202410006056A CN117758572A CN 117758572 A CN117758572 A CN 117758572A CN 202410006056 A CN202410006056 A CN 202410006056A CN 117758572 A CN117758572 A CN 117758572A
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- asphalt mixture
- asphalt
- temperature control
- bin
- control method
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- 239000010426 asphalt Substances 0.000 title claims abstract description 114
- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 238000010409 ironing Methods 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 46
- 230000008569 process Effects 0.000 description 10
- 230000009467 reduction Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Road Paving Machines (AREA)
Abstract
The invention discloses a winter asphalt road construction asphalt mixture temperature control method. According to the winter asphalt road construction asphalt mixture temperature control method provided by the invention, the ground heater arranged on the paver body can be used for heating the road surface to raise the temperature of the road surface, and the discharging bin and the ironing board on the paver body immediately pass through after the ground heater sweeps across the road surface, so that the heating of the ironing board by the ground heater is beneficial to reducing the heat loss of the asphalt mixture, and the paving temperature of the asphalt mixture during paving is ensured.
Description
Technical Field
The invention relates to the technical field of municipal road construction, in particular to a winter asphalt road construction asphalt mixture temperature control method.
Background
Asphalt concrete pavement can be constructed in winter, but the construction in winter is difficult and the cost is relatively high. This is mainly because the lower winter temperatures affect the asphalt mix paving and rolling operations, which all have their specific temperature requirements.
During winter construction, the temperature of the asphalt mixture is reduced too quickly due to lower ambient temperature, and the rolling time is very short, so that a large amount of waste materials are generated, the asphalt mixture is increased in viscosity, poor in workability, difficult to reach standards in compactness, difficult in quality control and the like due to the fact that the temperature of the asphalt mixture is reduced too quickly, and the influence of the environment on the asphalt mixture paving operation is reduced by adopting measures such as selecting proper asphalt materials, using proper additives to improve the cold resistance and crack resistance of asphalt, arranging paving operation in the morning and the like.
The temperature of the construction environment in winter is smaller, the above measures are all the influence on the asphalt reduction temperature passively, but the temperature of the operation environment is unpredictable, if the temperature value of the environment is lower than the expected temperature, the construction difficulty of asphalt paving operation is increased by adopting the scheme, even asphalt is too early coagulated due to prediction errors, and the asphalt cannot be constructed according to the established construction scheme.
Therefore, it is necessary to provide a temperature control method for asphalt mixture for winter asphalt road construction, which solves the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a temperature control method for asphalt mixture for winter asphalt road construction.
The invention solves the technical problems by adopting the following technical scheme.
The invention provides a method for improving construction temperature of an asphalt road in winter, which comprises the following steps: the road surface is heated by a ground heater arranged on the paver body, and then the heated asphalt mixture is conveyed to the front of an ironing board connected with the rear end of the paver body, and the asphalt mixture is ironed and tamped by the ironing board when the ironing board goes forward, so that a smooth and compact paving layer is formed.
The invention has the following beneficial effects:
the invention provides a winter asphalt road construction asphalt mixture temperature control method, which comprises the following steps: the road surface is heated by a ground heater arranged on the paver body, and then the heated asphalt mixture is conveyed to the front of an ironing board connected with the rear end of the paver body, and the asphalt mixture is ironed and tamped by the ironing board when the ironing board goes forward, so that a smooth and compact paving layer is formed. According to the paver provided by the invention, the ground heater on the paver body is used for heating the pavement, and as the distance between the ground heater and the discharging bin of the paver is relatively short, the discharging bin on the paver body and the ironing board immediately pass through after the ground heater sweeps across the pavement, so that the heating of the air around the ironing board by the ground heater is beneficial to reducing the heat dissipation of asphalt mixture. The method can reduce heat loss of the asphalt mixture in the construction process, thereby ensuring the paving temperature of the asphalt mixture during paving.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a paver in example 1 provided by the present invention;
fig. 2 is a schematic view of a paver in embodiment 2 provided by the present invention;
fig. 3 is a flow chart of construction steps of the temperature control method for asphalt mixture for winter asphalt road construction.
Wherein, the names corresponding to the reference numerals are: 101. a spreading machine; 102. a feeding bin; 103. discharging the material bin; 104. ironing board.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The embodiment of the invention provides a method for improving the construction temperature of an asphalt road in winter, which comprises the following steps: the road surface is heated by a ground heater arranged on the paver body, and then the heated asphalt mixture is conveyed to the front of an ironing board connected with the rear end of the paver body, and the asphalt mixture is ironed and tamped by the ironing board when the ironing board goes forward, so that a smooth and compact paving layer is formed.
According to the method for improving the construction temperature of the asphalt road in winter, the ground heater on the paver body is utilized to heat the road surface, and as the distance between the ground heater and the discharging bin of the paver is relatively short, the discharging bin on the paver body and the ironing board immediately pass through after the ground heater sweeps across the road surface, so that the heating of the air around the ironing board through the ground heater is beneficial to reducing the loss of heat of asphalt mixture. The method can reduce heat loss of the asphalt mixture in the construction process, thereby ensuring the paving temperature of the asphalt mixture during paving. In an alternative embodiment, the front end of the paver body is provided with a feeding bin, and the feeding bin is a semi-enclosed feeding bin made of steel plates.
In an alternative embodiment, a feeding bin is arranged at the front end of the paver body, and the feeding bin is a semi-enclosed feeding bin made of steel plates.
In an alternative embodiment, the outer wall of the feeding bin is provided with a heat insulation layer, and the upper part of the feeding bin is provided with heat insulation cloth.
In an alternative embodiment, a floor heater is provided behind the feed bin.
In an alternative embodiment, the ground heater is a flame sprayer, and the ground heater moves forward with the paver body.
In an alternative embodiment, a discharge bin is arranged in front of the ironing board, and the discharge bin is made of double-layer steel plates.
In an alternative embodiment, the heating wire is disposed in the double-layer steel plate, and the heating wire is disposed in the heat conducting plate, and the heat conducting plate is disposed in the double-layer steel plate.
In an alternative embodiment, the asphalt mixture in the feeding bin is conveyed to the position of the spiral distributor through the scraper conveyer and then enters the discharging bin, and the asphalt mixture in the discharging bin is conveyed to the front of the ironing plate through the spiral conveyer to the two sides of the paver body.
In an alternative embodiment, the method further comprises: the heat insulation layer is arranged on the outer wall of the hopper of the asphalt mixture transport vehicle, and the heat insulation cloth is arranged on the upper part of the hopper, so that heat dissipation of asphalt materials in the transport vehicle during transport is reduced.
In an alternative embodiment, the method comprises the steps of: the asphalt mixture is placed in a transport vehicle with a heat insulation layer arranged on the outer wall and the upper part of a hopper for transportation, then the asphalt mixture is input into a semi-enclosed feeding bin with the heat insulation layer arranged on the outer wall and the upper part of a paver body, a flame sprayer is used for heating a pavement, an electric heating wire in a discharging bin is electrified for heating the asphalt mixture, the asphalt mixture is conveyed to the front of the whole ironing board at the rear end of the paver body, the ironing board moves forwards under the traction of the paver body, and the asphalt mixture is ironed and compacted to form a smooth and compact asphalt mixture paving layer.
Therefore, the embodiment of the invention provides a method for improving the construction temperature of asphalt roads in winter, the asphalt mixture has higher temperature after being produced into a finished product, then is transported to a construction site and radiates heat to the outside in the paving process, each transportation link process has heat loss, the heat dissipation control on the transportation process and the transportation process can passively control the temperature of asphalt, a mechanical device is heated and heat is transferred when asphalt is in contact with the machinery, and the higher temperature is transferred to the asphalt mixture from an electric heating wire, so that the active control on the temperature of the asphalt mixture is realized. In the embodiment of the invention, the temperature is controlled from the transportation of the asphalt mixture to the paving process, so that the heat loss of the asphalt mixture in the whole process is effectively reduced, and the paving temperature of the asphalt mixture during paving is ensured.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Referring to fig. 1-2, the asphalt mixture paver for winter asphalt road construction provided by the embodiment of the invention comprises a paver body, wherein a feeding bin is arranged at the front end of the paver body, a discharging bin is arranged at the rear end of the paver body, a ground heater is also arranged at the rear end of the feeding bin, and an ironing board is also arranged at the rear end of the discharging bin.
Further, the feeding bin is a semi-enclosed feeding bin made of steel plates, a heat insulation layer is arranged on the outer wall of the feeding bin, and heat insulation cloth is arranged on the upper portion of the feeding bin.
Further, the discharging bin is made of double-layer steel plates, and heating wires are arranged in the double-layer steel plates; the heating wire is arranged in the heat conducting plate, and the heat conducting plate is arranged in the double-layer steel plate.
Further, the ground heater is a flame injector; the ground heater moves forward with the paver body.
Referring to fig. 3, the temperature control method of the asphalt mixture for winter asphalt road construction provided by the embodiment of the invention comprises the following steps:
s1: firstly, treating a base layer of a pavement;
s2: then paving stabilized macadam on the surface of the base layer, and spraying a penetrating oil layer on the surface of the stabilized macadam;
s3: and paving an asphalt mixture layer on the surface of the oil-permeable layer through a paver.
Further, setting related parameters such as paving width, paving thickness, paving speed, vibrating vibration and pre-camber according to construction requirements, pushing the skip by the paver body 101, receiving the mixture on the skip into the feeding bin 102 while driving, and conveying the mixture received in the feeding bin 102 to the position of the spiral distributor through the scraper conveyer; and then enters the discharging bin 103, and the asphalt mixture is conveyed to the front of the whole ironing board 104 by a screw conveyor to two sides.
Example 1
Referring again to fig. 1-3, the winter asphalt road construction asphalt mixture temperature control method provided by the embodiment of the invention comprises the following steps:
s1: firstly, treating a base layer of a pavement;
s2: then paving stabilized macadam on the surface of the base layer, and spraying a penetrating oil layer on the surface of the stabilized macadam;
s3: the front end of the paver body 101 is provided with a feeding bin 102, the feeding bin 102 is a semi-enclosed bin made of steel plates, asphalt materials are poured into the feeding bin 102 and then are backwards conveyed to the rear of the paver body 101 through a conveyor belt to carry out paving operation
S4: before the paving operation, arranging a heat insulation layer on the outer wall of a feeding bin 102 of the paver body 101 and arranging heat insulation cloth on the upper part of the feeding bin;
s5: finally, the paving operation is performed by the paver body 101.
S6: a device capable of heating the ground is installed at the rear of the feeding bin 102.
The concrete construction steps are as follows: firstly, processing a base layer of a pavement, checking the thickness, compactness, flatness, road camber and the like of the base layer, if loose, pit grooves, elastic or surface floating and the like are finished before paving the surface layer, cleaning, then paving stabilized macadam, spraying a oil-penetrating layer on the surface of the stabilized macadam, adopting slow-cracking emulsified asphalt PC-2 as the oil-penetrating layer, preferably spraying when the surface is slightly dry and not hardened after finishing the construction of the base layer, controlling the depth of penetrating oil of the oil-penetrating layer into the base layer to be not less than 5-10mm and controlling the dosage to be 0.7-1.5L/m 2 In the range of (total emulsified asphalt including diluent and moisture, the content of residues in emulsified asphalt is 50% based on the total emulsified asphalt), the oil-permeable layer asphalt is sprayed on the base layer to protect the oil-permeable layer from being damaged by the transport wheels, and the amount of the oil-permeable layer asphalt can be immediately sprayed is 2-3m 3 /1000m 2 It should be noted that the construction is arranged in a period from eleven am to three pm, the temperature in the period is higher, the asphalt mixture and the asphalt mixture can be reducedThe temperature difference of the boundary air temperature is further reduced, the temperature reduction speed of the asphalt mixture is further reduced, the temperature reduction speed is measured and paying-off operation is carried out after the asphalt mixture is ready, the temperature reduction speed comprises two contents of elevation measurement and plane control, the purpose of elevation measurement is to determine the accurate data of the difference between the surface elevation of the lower bearing layer and the original design elevation, a datum wire method can be adopted on the elevation control, a parameter string (a thin wire rope) which accords with the design longitudinal slope is specially arranged on the side of the lower bearing layer, a touch piece of a sensor moves along the string, the asphalt mixture starts to be paved after the preparation of related operation, before the paving is carried out, a conveying machine is required to convey the mixture to a construction site, the temperature of the mixture is controlled within a certain range after the processing of a factory is finished, after the mixture is loaded on a conveying vehicle, the heat of the mixture is dissipated into the air, and therefore, the temperature of the mixture is reduced by adopting a heat insulation layer on the outer wall of a bin of the conveying vehicle, and the heat insulation cloth can be prevented from being dissipated outwards in the conveying process.
Through improving the feed bin of transport vechicle at the transportation, measures such as outer wall sets up insulating layer, upper portion setting up heat insulating cloth can reduce the heat dissipation of the interior bituminous mixture of transport vechicle when transporting to the paving temperature when guaranteeing bituminous mixture and spreading.
Example 2
Referring again to fig. 1-3, it is noted that the temperature of the paving surface is required to be lower than 5 degrees in construction, and the construction specification prescribes that the lowest temperature cannot be lower than 5 degrees in construction from the asphalt pavement, because the viscosity of asphalt is increased and the fluidity is deteriorated under low temperature conditions, so that the quality and durability of the pavement are affected, and therefore, attention is required to the temperature value of the asphalt pavement, and for the pavement with lower temperature, the pavement can be baked by flame spraying, so that the temperature of the pavement is increased, and in specific construction, a flame sprayer or the like is installed at the rear end of the feeding bin 102, and as the paver body 101 moves forward, the sprayed flame moves forward along with the paver body 101, the temperature of the ground contacted with the flame is increased under baking, and at the same time, the temperature near the construction surface can also be heated.
The temperature of the asphalt pavement can be raised by the flame ejector, and because the flame ejector is relatively close to the discharging bin 103 of the paver body 101, the discharging bin 103 of the paver body 101 and the ironing plate 104 pass through immediately after the flame ejector sweeps across the pavement, the heating of the air of the ironing plate 104 by the flame ejector is beneficial to reducing the heat dissipation of the asphalt mixture.
Example 3
Referring again to fig. 1-3, when the paver body 101 performs paving operation, firstly, setting related parameters such as paving width, paving thickness, paving speed, vibration and pre-camber according to construction requirements, then, pushing the skip by the paver body 101, receiving the mixture on the skip into a bin while driving, then, conveying the mixture received in the bin to the position of a spiral distributor through a scraper conveyer, conveying the mixture to the front of the whole ironing device through the spiral conveyer to the two sides, finally, the ironing device forwards under traction of a host machine, ironing and tamping the mixture to form a smooth and dense paving layer, for further compaction forming of a road roller, and the method needs to be noticed that in the paving process, a datum line is required to be controlled to ensure the accuracy of pavement structure level and construction position, specifically, a steel wire method is adopted to determine the datum plane when the height is controlled, a floating datum beam method is adopted when the thickness is controlled, the asphalt mixture is heated by an ironing plate 104 at present, a certain defect exists in the scheme, firstly, if the heating temperature of the ironing plate 104 is insufficient or uneven, the mixture is caused to be adhered to the ironing plate, the temperature is not uniform, the temperature of the asphalt mixture can be heated down, the gradient can be affected by the heat gradient can be increased in the paving plate 103, the heat gradient can be increased, the asphalt layer can be affected before the asphalt layer is stressed, the asphalt layer is heated, and the heat gradient can be changed, and the asphalt layer is not be fully stressed, and the asphalt layer is stressed, and the heat gradient can be fully stressed, and the heat well can be well stressed, and the heat well is well stressed, and the surface can be fully heated, and the asphalt well and the surface is well heated and the high down well and the asphalt well heated and the asphalt well and heated The operation of ramming can also integrate heating device in this part simultaneously, can make ejection of compact storehouse 103 through double-deck steel sheet, sets up the heater strip between the two-layer steel sheet, and the device during operation heater strip circular telegram generates heat, and it is difficult to concentrate too much to need note that the heater strip generates heat, can use the heat-conducting plate to evenly pass the heat on the steel sheet.
Through setting up the heater strip between the steel sheet to in the air of heat transfer to ejection of compact storehouse 103 along with the steel sheet is heated, when the bituminous mixture is stirred, have the gap between the mixture, the heated air gets into in the little gap between the bituminous mixture carries out heat transfer, prevents that external lower temperature from invading in the bituminous mixture.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The temperature control method of the asphalt mixture for winter asphalt road construction is characterized in that a ground heater arranged on a paver body is utilized to heat a road surface, then the heated asphalt mixture is conveyed to the front of an ironing board connected with the rear end of the paver body, and the ironing board is used for ironing and tamping the asphalt mixture when in forward movement to form a flat and compact paving layer.
2. The temperature control method according to claim 1, wherein a feeding bin is arranged at the front end of the paver body, and the feeding bin is a semi-enclosed feeding bin made of steel plates.
3. The temperature control method according to claim 2, wherein the outer wall of the feeding bin is provided with a heat insulation layer, and the upper part is provided with heat insulation cloth.
4. The temperature control method of claim 2, wherein a floor heater is provided behind the feed bin.
5. The method of temperature control according to claim 4, wherein the surface heater is a flame injector and moves forward with the paver body.
6. The method according to claim 1, characterized in that a discharge bin is provided in front of the ironing board, the discharge bin being made of a double layer steel plate.
7. The method according to claim 6, wherein a heating wire is provided in the double-layered steel plate, and the heating wire is provided in the heat conductive plate, and the heat conductive plate is provided in the double-layered steel plate.
8. The method according to claim 6, wherein the asphalt mixture in the feeding bin is conveyed to the position of the spiral distributor through the scraper conveyer and then enters the discharging bin, and the asphalt mixture in the discharging bin is conveyed to the front of the ironing board through the spiral conveyer to two sides of the paver body.
9. The temperature control method according to claim 1, characterized by further comprising: the heat insulation layer is arranged on the outer wall of the hopper of the asphalt mixture transport vehicle, and the heat insulation cloth is arranged on the upper part of the hopper, so that heat dissipation of asphalt materials in the transport vehicle during transport is reduced.
10. The temperature control method according to any one of claims 1 to 9, characterized by comprising the steps of: the asphalt mixture is placed in a transport vehicle with a heat insulation layer arranged on the outer wall and the upper part of a hopper for transportation, then the asphalt mixture is input into a semi-enclosed feeding bin with the heat insulation layer arranged on the outer wall and the upper part of a paver body, a flame sprayer is used for heating a pavement, an electric heating wire in a discharging bin is electrified for heating the asphalt mixture, the asphalt mixture is conveyed to the front of the whole ironing board at the rear end of the paver body, the ironing board moves forwards under the traction of the paver body, and the asphalt mixture is ironed and compacted to form a smooth and compact asphalt mixture paving layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410006056.1A CN117758572A (en) | 2024-01-03 | 2024-01-03 | Winter asphalt road construction asphalt mixture temperature control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410006056.1A CN117758572A (en) | 2024-01-03 | 2024-01-03 | Winter asphalt road construction asphalt mixture temperature control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117758572A true CN117758572A (en) | 2024-03-26 |
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ID=90310678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410006056.1A Pending CN117758572A (en) | 2024-01-03 | 2024-01-03 | Winter asphalt road construction asphalt mixture temperature control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117758572A (en) |
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2024
- 2024-01-03 CN CN202410006056.1A patent/CN117758572A/en active Pending
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