CN111827041B - Smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt - Google Patents
Smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt Download PDFInfo
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- CN111827041B CN111827041B CN202010745681.XA CN202010745681A CN111827041B CN 111827041 B CN111827041 B CN 111827041B CN 202010745681 A CN202010745681 A CN 202010745681A CN 111827041 B CN111827041 B CN 111827041B
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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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
- 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
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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
- 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
- E01C19/22—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 consolidating or finishing laid-down unset materials
-
- 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
- E01C19/22—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 consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of pavement construction, in particular to a smoke suppression and flame retardation construction method of environment-friendly modified asphalt, which comprises the following steps: the method comprises the following steps: cleaning the lower bearing layer and spraying layer oil; step two: cold laying a bottom layer by using low-temperature asphalt coarse materials, and carrying out primary pressing on the bottom layer; step three: hot laying the middle layer by using a low-temperature asphalt absorbing material, and re-pressing the middle layer; step four: cold laying a surface layer by using a low-temperature asphalt membrane material, and performing melt pressing; step five: and cooling and final pressing the surface layer. The invention shortens the high-temperature duration time of the asphalt by reducing the temperature of the raw materials in the transportation and transfer process and matching with a temporary heating device in the laying operation, thereby not only reducing the emission of harmful substances, but also improving the construction efficiency.
Description
Technical Field
The invention relates to the technical field of pavement construction, in particular to a smoke suppression and flame retardation construction method of environment-friendly modified asphalt.
Background
Petroleum asphalt is a mixture composed of hydrocarbons and hydrocarbon derivatives with different properties and molecular weights, and the asphalt is very easy to release toxic smog containing harmful components such as dioxin and the like under the condition of high temperature (120-180 ℃), while compounds such as benzopyrene and the like in the asphalt fume are strong carcinogenic substances. When the maximum temperature of pavement paving is about 180 ℃, constructors can cause a series of health hazards such as vomit, stomachache, appetite reduction, headache, fatigue, skin and eye, nose and throat stimulation and the like after working in asphalt smoke for a long time, symptoms such as lacrimation, photophobia, foreign body sensation, scorching dryness of nasopharynx, pharyngitis and the like exist, severe patients can cause toxic pneumonia, liver swelling and leukocyte increase, and cancer and respiratory diseases are induced.
At present, in China, the smoke emitted by asphalt is strongly stimulating the respiratory system of operators in the great development period of road construction and maintenance, a series of health hazards are brought to human bodies, the physical and mental health and life safety of constructors are threatened, and the situation is more serious when the asphalt is constructed in a relatively closed environment (such as a long tunnel).
Disclosure of Invention
The invention provides a smoke-inhibiting and flame-retarding construction method of environment-friendly modified asphalt, which shortens the high-temperature duration of the asphalt by reducing the temperature of raw materials in the transportation process and matching with a temporary heating device in laying operation, thereby reducing the emission of harmful substances and improving the construction efficiency.
In order to achieve the purpose, the invention provides the following technical scheme: a smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt comprises the following steps:
the method comprises the following steps: cleaning the lower bearing layer and spraying layer oil;
step two: cold laying a bottom layer by using low-temperature asphalt coarse materials, and carrying out primary pressing on the bottom layer;
step three: hot laying the middle layer by using a low-temperature asphalt absorbing material, and re-pressing the middle layer;
step four: cold laying a surface layer by using a low-temperature asphalt membrane material, and performing melt pressing;
step five: and cooling and final pressing the surface layer.
Preferably, in the step 1, the second step is performed within 5 to 10 seconds after the diathermic oil is sprayed.
Preferably, in the third step, the low-temperature asphalt fine material is paved by heating on site, and the middle layer after paving is firstly subjected to hot re-pressing and then to cold re-pressing.
Preferably, the low-temperature asphalt film material in the fourth step is of a thin film structure, and the surface layer is fused and pressed into the upper surface of the middle layer through a heating device.
Preferably, in the fifth step, the surface layer is cooled by spraying water.
Preferably, a heating device is used in the construction method according to claims 1 to 5, and is matched with a compression roller of a road roller, and is characterized in that: comprises a heating sliding plate, a cooling sliding plate and a matching bracket connected between the heating sliding plate and the cooling sliding plate; the bottoms of the heating sliding plate and the cooling sliding plate are positioned in the same plane and are distributed on the front side and the rear side of the compression roller; the matching support is a rectangular frame horizontally nested around the compression roller, and the tops of the heating sliding plate and the cooling sliding plate are respectively connected with the bottom of one corresponding end of the matching support; the heating sliding plate is connected with a radiator, an evaporator is arranged above the cooling sliding plate, the matching support is provided with a compressor, and the inlet end and the outlet end of the compressor are respectively communicated with the outlet end of the evaporator and the inlet end of the radiator; the outlet end of the radiator is communicated with the inlet end of the evaporator through an expansion valve; the heat radiator is internally provided with a cold medium.
The invention has the beneficial effects that: by the construction method, the high-temperature duration of the asphalt can be shortened in the pavement paving process, so that the asphalt is prevented from generating more harmful substances at high temperature for a long time. Therefore, the road surface construction efficiency is improved, and meanwhile, the risk of poisoning of constructors is reduced. The high-temperature penetrating layer oil is prevented from being exposed in the air for a long time, the penetrating layer oil is just covered by the low-temperature asphalt coarse material used for laying the bottom layer when contacting the lower bearing layer, in the heat exchange process of the penetrating layer oil and the low-temperature asphalt coarse material, the high temperature of the penetrating layer oil melts the surface asphalt film of the low-temperature asphalt coarse material and is integrated, meanwhile, the temperature of the penetrating layer oil is taken away by the low-temperature asphalt coarse material, the temperature of the penetrating layer oil is rapidly reduced, and the emission of redundant harmful substances is avoided. The low-temperature asphalt fine material can not emit more harmful substances in the transportation process, the uneven bottom layer is easily filled, meanwhile, in the hot repressing process, the low-temperature asphalt fine material is heated and melted, the activity and the flowability of the low-temperature asphalt fine material are improved, and after the hot repressing is finished, the cold repressing is carried out, so that the middle layer formed by the low-temperature asphalt fine material is cooled and solidified, the ventilation effect of the middle layer is reduced, and the emission of harmful substances to the air from the bottom layer and the bottom of the middle layer is reduced. The low-temperature asphalt film material is used for carrying out secondary curing on the sand and stone particles on the top of the middle layer, and is finally melted into the bottom of the middle layer under the action of the heating device, so that the final asphalt pavement surface layer is realized. After pavement paving operation is finished, water is sprayed on the pavement to cool the pavement, and harmful substances emitted by the asphalt are further controlled.
The heating device is matched with the road roller for use and is fixed at the front part and the rear part of the compression roller of the road roller through a matching support. The heating slide plate and the cooling slide plate move smoothly on the newly paved asphalt road surface along with the compression roller in the working process of the road roller, the expansion valve cooperates with the compressor to circulate the cold medium between the radiator and the evaporator, thereby bringing heat from the cooling slide to the heating slide, the process can refer to the working principle of the air conditioner, correspondingly, a change-over valve and a one-way valve can be additionally arranged on a pipeline between the radiator and the evaporator to realize the working principle of the air conditioner, thereby the working modes of the heating sliding plate and the cooling sliding plate are mutually converted, the adjustment of the temperature of the road surface before and after the compression roller is realized in the working process of the road roller, for example, the heating sliding plate heats and softens the road surface, then the compression roller rolls the road surface, and after the compression roller is pressed, the cooling slide plate cools and solidifies the asphalt, so that the high-temperature duration of the asphalt is shortened, and the emission of harmful substances is reduced. The heating slide plate can also adopt an electric heating mode, and the cooling slide plate can also adopt a water-cooling or air-cooling radiator form.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the construction steps of the present invention;
FIG. 2 is a schematic view of the operation of the heating apparatus of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the smoke suppression and flame retardation construction method of the environment-friendly modified asphalt comprises the following steps:
the method comprises the following steps: cleaning the lower bearing layer 1 and spraying layer oil;
step two: cold laying a bottom layer 2 by using low-temperature asphalt coarse materials, and carrying out primary pressing on the bottom layer 2;
step three: hot laying the middle layer 3 by using low-temperature asphalt absorption materials, and re-pressing the middle layer 3;
step four: cold laying the surface layer 4 by using a low-temperature asphalt membrane material, and performing melt pressing;
step five: the skin layer 4 is subjected to a final cooling press.
By the construction method, the high-temperature duration of the asphalt can be shortened in the pavement paving process, so that the asphalt is prevented from generating more harmful substances at high temperature for a long time. Therefore, the road surface construction efficiency is improved, and meanwhile, the risk of poisoning of constructors is reduced.
Example two:
in the first step, after the penetrating layer oil is sprayed, the second step is performed within 5 to 10 seconds.
By implementing the method, the high-temperature penetration layer oil is prevented from being exposed in the air for a long time, the penetration layer oil is covered by the low-temperature asphalt coarse material for laying the bottom layer 2 just by contacting the lower bearing layer 1, in the heat exchange process of the penetration layer oil and the low-temperature asphalt coarse material, the high temperature of the penetration layer oil melts the surface asphalt film of the low-temperature asphalt coarse material and is integrated, meanwhile, the temperature of the penetration layer oil is taken away by the low-temperature asphalt coarse material, so that the penetration layer oil is rapidly reduced in temperature, and the emission of redundant harmful substances is avoided.
Example three:
and in the third step, the low-temperature asphalt fine material is heated and paved on site, and the middle layer 3 after paving is firstly subjected to hot re-pressing and then to cold re-pressing.
In this setting, the low temperature asphalt fine material can not give off more harmful substance in the transportation, and fill unevenness's bottom 2 easily, simultaneously at the hot repression in-process, heat the low temperature asphalt fine material and melt, improve the activity and the mobility of low temperature asphalt fine material, and after hot repression is accomplished, cold repression of going on makes the 3 lower temperature solidifications in middle level that constitute by the low temperature asphalt fine material, reduce the ventilation effect in middle level 3, reduce bottom 2 and 3 bottoms in middle level and give off harmful substance in to the air.
Example four:
and in the fourth step, the low-temperature asphalt film material is of a thin film structure, and the surface layer 4 is melted and pressed into the upper surface of the middle layer 3 through a heating device.
In the above arrangement, the low-temperature asphalt film material is used for secondary curing of the sand particles on the top of the middle layer 3, and is finally melted into the bottom of the middle layer 3 under the action of the heating device, so as to realize the final asphalt pavement surface layer 4.
Example five:
in the fifth step, the surface layer 4 is cooled by spraying water.
After pavement paving operation is finished, water is sprayed on the pavement to cool the pavement, and harmful substances emitted by the asphalt are further controlled.
According to fig. 2, a heating device, fitted to a roller 6 of a roller, comprises: the device comprises a heating sliding plate 5, a cooling sliding plate 7 and a matching bracket 8 connected between the heating sliding plate 5 and the cooling sliding plate 7; the bottoms of the heating sliding plate 5 and the cooling sliding plate 7 are positioned in the same plane and are distributed on the front side and the rear side of the compression roller 6; the matching support 8 is a rectangular frame horizontally nested around the compression roller 6, and the tops of the heating sliding plate 5 and the cooling sliding plate 7 are respectively connected with the bottom of one corresponding end of the matching support 8; the heating sliding plate 5 is connected with a radiator 9, an evaporator 10 is arranged above the cooling sliding plate 7, a compressor 11 is arranged on the matching support 8, and the inlet end and the outlet end of the compression are respectively communicated with the outlet end of the evaporator 10 and the inlet end of the radiator 9; the outlet end of the radiator 9 is communicated with the inlet end of the evaporator 10 through an expansion valve 12; a cold medium is arranged in the radiator 9.
In the arrangement, the heating device is used in cooperation with the road roller and is fixed at the front part and the rear part of the compression roller 6 of the road roller through the matching support 8. The heating slide plate 5 and the cooling slide plate 7 move smoothly on a newly paved asphalt road surface along with the compression roller 6 in the working process of the road roller, the expansion valve 12 is matched with the compressor 11 to circulate a cold medium between the radiator 9 and the evaporator 10 so as to bring the heat on the cooling slide plate 7 to the heating slide plate 5, the process can refer to the working principle of an air conditioner, correspondingly, a change-over valve and a one-way valve can be additionally arranged on a pipeline between the radiator 9 and the evaporator 10 so as to realize the working principle of a cooling and heating air conditioner, so that the working modes of the heating slide plate 5 and the cooling slide plate 7 are mutually changed, the road surface temperature before and after the compression roller 6 is adjusted in the working process of the road roller, for example, the road surface is heated and softened by the heating slide plate 5, then is rolled by the compression roller 6, and after the compression roller 6 is pressed, the cooling slide plate 7 cools and solidifies, thereby shortening the high temperature duration of the asphalt and reducing the emission of harmful substances. The heating slide 5 can also be electrically heated, and the cooling slide 7 can also be in the form of a water-cooled or air-cooled radiator 9.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The smoke-inhibiting flame-retardant construction method of the environment-friendly modified asphalt is characterized by comprising the following steps of:
the method comprises the following steps: cleaning the lower bearing layer and spraying layer oil;
step two: cold laying a bottom layer by using low-temperature asphalt coarse materials, and carrying out primary pressing on the bottom layer;
step three: hot laying the middle layer by using a low-temperature asphalt absorbing material, and re-pressing the middle layer;
step four: cold laying a surface layer by using a low-temperature asphalt membrane material, and performing melt pressing;
step five: cooling the surface layer for final pressing;
a heating device is matched on a compression roller of a road roller and comprises a heating sliding plate, a cooling sliding plate and a matching support connected between the heating sliding plate and the cooling sliding plate; the bottoms of the heating sliding plate and the cooling sliding plate are positioned in the same plane and are distributed on the front side and the rear side of the compression roller; the matching support is a rectangular frame horizontally nested around the compression roller, and the tops of the heating sliding plate and the cooling sliding plate are respectively connected with the bottom of one corresponding end of the matching support; the heating sliding plate is connected with a radiator, an evaporator is arranged above the cooling sliding plate, the matching support is provided with a compressor, and the inlet end and the outlet end of the compressor are respectively communicated with the outlet end of the evaporator and the inlet end of the radiator; the outlet end of the radiator is communicated with the inlet end of the evaporator through an expansion valve; the heat radiator is internally provided with a cold medium.
2. The smoke suppression and flame retardation construction method of the environment-friendly modified asphalt as claimed in claim 1, characterized in that: in the first step, after the penetrating layer oil is sprayed, the second step is performed within 5 to 10 seconds.
3. The smoke suppression and flame retardation construction method of the environment-friendly modified asphalt as claimed in claim 1, characterized in that: and in the third step, the low-temperature asphalt fine material is heated and paved on site, and the middle layer after paving is firstly subjected to hot re-pressing and then to cold re-pressing.
4. The smoke suppression and flame retardation construction method of the environment-friendly modified asphalt as claimed in claim 1, characterized in that: and in the fourth step, the low-temperature asphalt film material is of a film structure, and the surface layer is melted and pressed into the upper surface of the middle layer through a heating device.
5. The smoke suppression and flame retardation construction method of the environment-friendly modified asphalt as claimed in claim 1, characterized in that: and step five, cooling the surface layer by sprinkling water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010745681.XA CN111827041B (en) | 2020-07-29 | 2020-07-29 | Smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt |
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| CN202010745681.XA CN111827041B (en) | 2020-07-29 | 2020-07-29 | Smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt |
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| CN111827041B true CN111827041B (en) | 2021-12-31 |
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