CN115162111A - Low-temperature asphalt construction process - Google Patents
Low-temperature asphalt construction process Download PDFInfo
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- CN115162111A CN115162111A CN202210772830.0A CN202210772830A CN115162111A CN 115162111 A CN115162111 A CN 115162111A CN 202210772830 A CN202210772830 A CN 202210772830A CN 115162111 A CN115162111 A CN 115162111A
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- asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 97
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 35
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 238000003892 spreading Methods 0.000 claims abstract description 18
- 230000007480 spreading Effects 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 8
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 4
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- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 8
- 229910017059 organic montmorillonite Inorganic materials 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
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- UOHMMEJUHBCKEE-UHFFFAOYSA-N prehnitene Chemical compound CC1=CC=C(C)C(C)=C1C UOHMMEJUHBCKEE-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
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- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
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- 239000003546 flue gas Substances 0.000 description 3
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- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 description 3
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- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
- E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4833—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
-
- 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
-
- 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
- E01C19/12—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 distributing granular or liquid materials
- E01C19/16—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 distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
-
- 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
-
- 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
- E01C19/238—Wetting, cleaning or heating rolling elements, e.g. oiling, wiping, scraping
-
- 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
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
-
- 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
- E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4806—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a low-temperature asphalt construction process, which comprises the following steps: cleaning a pavement, and planning a construction guide line on the pavement; mixing the asphalt mixture, mixing the modified asphalt and the concrete slurry in proportion in a stirrer, and stirring for 12-18min at the rotating speed of 850-950 r/min; spreading, namely uniformly spreading the mixture in a planned guide line on the road surface by a spreading machine, wherein the spreading speed is controlled to be 1-3m/min, and the spreading temperature is controlled to be 80-100 ℃; wherein, the tire surface of the paver is evenly sprayed with an isolation protective layer every 30-40 min; compacting, namely sequentially carrying out primary pressing, secondary pressing and final pressing in a static pressure or vibration rolling mode; opening traffic, namely naturally cooling the paved asphalt pavement to be lower than 30 ℃, and opening traffic; compared with the prior art, the invention carries out construction by cleaning the road surface, mixing the asphalt mixture, paving, compacting and opening traffic, thereby improving the quality of the asphalt road surface.
Description
Technical Field
The invention relates to the technical field of asphalt pavement construction, in particular to a low-temperature asphalt construction process.
Background
Asphalt pavement refers to various types of pavement that are made by incorporating into mineral materials a road asphalt material. The asphalt binder improves the capability of the paving aggregate to resist damage of traveling vehicles and natural factors to the pavement, and enables the pavement to be smooth, less in dust, impermeable and durable. Accordingly, asphalt pavement is one of the most widely used high-grade pavements in road construction.
However, when the existing asphalt highway is constructed according to the traditional construction method, the maintenance of the highway base layer is mainly realized in a manual watering mode, because the evaporation of the moisture of the asphalt highway base layer is greatly influenced by factors such as external temperature and the like in the manual watering and maintenance process, the asphalt highway base layer is easy to generate dry cracks due to water shortage, meanwhile, the bonding strength between the asphalt highway surface layer and the asphalt highway base layer paved by the traditional construction method is poor, and the asphalt highway surface layer and the asphalt highway base layer are easy to move along with the increase of the highway service time, so that the damage of the asphalt highway is accelerated, and the service life of the asphalt highway is shortened; meanwhile, in the process of paving by the paver, the asphalt is easily adhered to the tires of the paver, and the asphalt needs to be removed from the tires of the paver after the paver stops running at intervals, so that the construction efficiency of the asphalt pavement is reduced in the process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-temperature asphalt construction process to solve the problems that the quality of an asphalt pavement is influenced because a base layer of the traditional asphalt pavement needs to be sprayed with water and the construction efficiency of the asphalt pavement is reduced because asphalt is adhered to tires of a paver in the paving process of the paver in the prior art.
In order to realize the purpose, the invention adopts the following technical scheme: a low-temperature asphalt construction process comprises the following steps:
(1) Cleaning road surface
Cleaning a pavement and planning a construction guide line on the pavement;
(2) Mixing of asphalt mixture
Mixing the modified asphalt and the concrete slurry in proportion in a stirrer, and stirring for 12-18min at the rotating speed of 850-950 r/min;
(3) Paving machine
Uniformly spreading the mixture in a planned guide line on the road surface by a spreading machine, wherein the spreading speed is controlled to be 1-3m/min, and the spreading temperature is controlled to be 80-100 ℃; wherein, the tire surface of the paver is evenly sprayed with a layer of isolation protection layer every 30-40 min;
(4) Compacting
Sequentially carrying out primary pressing, secondary pressing and final pressing in a static pressure or vibration rolling mode;
(5) Open traffic
The paved asphalt pavement is naturally cooled to be lower than 30 ℃, and then the traffic can be opened.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention cancels the step of sprinkling water on the base layer of the traditional asphalt pavement, carries out the construction of the asphalt pavement by a series of steps of cleaning the pavement, mixing asphalt mixture, paving, compacting and opening traffic, and improves the quality of the asphalt pavement by combining the limitation of specific parameters or working modes in each construction step;
2. the isolation protective layer is uniformly sprayed on the surface of the tire of the paver every 30-40min, so that asphalt is prevented from being adhered to the tire of the paver, and the construction efficiency of the asphalt pavement is improved.
Drawings
FIG. 1 is a schematic view of the assembly of a release agent application mechanism according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of portion A of FIG. 1;
FIG. 3 is a partial cross-sectional view of portion B of FIG. 1;
fig. 4 is a partially enlarged view of a portion C in fig. 3.
Reference numerals in the drawings of the specification include: the device comprises a protective cover 1, a soft brush 2, an adjusting plate 3, a traction rod 4, a liquid storage part 5, an adjusting part 6, a speed reducer 7, a power input shaft 8, a driving sector gear 9, a driven circular gear 10, a locking column 11, a handle 12, a winding shaft 13, a traction rope 14 and a return spring 15.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
example 1
The embodiment provides a low-temperature asphalt construction process, which comprises the following steps:
(1) Cleaning road surface
Cleaning a pavement and planning a construction guide line on the pavement; the method specifically comprises the steps of cleaning the road surface to avoid impurities from being mixed into the asphalt mixture; and draw the guide line outside the width of road surface, can regard edge line of road surface as the guide line too, guarantee that the edge of the construction is straight and esthetic; meanwhile, traffic control facilities such as road cones, signs and the like are arranged on the outer side of the construction direction wire.
(2) Mixing of asphalt mixture
Mixing the modified asphalt, the concrete slurry and the mixture of the organic montmorillonite and the molecular sieve in a mixer in proportion, and stirring for 12-18min at the rotating speed of 850-950 r/min;
wherein the modified asphalt comprises 100 parts by mass of No. 70 matrix asphalt, 45 parts by mass of styrene-butadiene-styrene triblock copolymer, 20 parts by mass of waste automobile tire rubber powder and 15 parts by mass of C11-C17 high-boiling-point hydrocarbon mixture; the concrete slurry comprises 70 parts of cement, 25 parts of fly ash, 3 parts of bentonite, 90 parts of broken stone, 13 parts of modified calcium oxide, 17 parts of cellulose fiber, 13 parts of sodium methyl silicate, 14 parts of triethanolamine and 130 parts of water; 20 parts of organic montmorillonite soil and 25 parts of molecular sieve; the modifier in the modified asphalt changes the attraction among asphalt molecules by a physical method in the production and construction process, and reduces the asphalt viscosity and the mixing, construction and rolling temperatures of asphalt mixtures; in the using process, the molecular weight and viscosity of the asphalt are increased due to external factors such as rolling, sunshine and the like, and simultaneously, the active components in the modified asphalt and substances such as silicate and the like in the concrete slurry generate a chemical modification process (a complex taking C and Si atoms as centers is formed) similar to a complex reaction, so that the strength of the asphalt mixture is gradually enhanced along with the composite modification process, and the high-temperature resistance, the anti-rutting performance, the low-temperature resistance and the adhesion performance of the asphalt mixture are greatly improved; the temperature in the asphalt mixture is higher in the construction process, so that a large amount of toxic gas is easily generated, and the toxic gas is inhibited by the matching of the organic montmorillonite and the molecular sieve, so that the working environment of constructors is improved;
and the temperature of the asphalt mixture after the completion of the mixing is controlled to be 105-125 ℃.
(3) Paving machine
Uniformly spreading the mixture in a planned guide line on the road surface by a spreading machine, wherein the spreading speed is controlled to be 1-3m/min, and the spreading temperature is controlled to be 80-100 ℃; wherein, the tire surface of the paver is evenly sprayed with a layer of isolation protection layer every 30-40 min; the tire of the paver is specifically provided with a separant spraying mechanism in a matching way, a layer of asphalt separant is uniformly coated on the tire of the paver every 30-40min by the separant spraying mechanism, and the asphalt separant is an existing liquid separant, such as a separation modifier of a Kouta g2 road roller produced by Sichuan Kouta traffic science and technology limited; because the paving temperature is relatively low, the asphalt is easy to adhere to the tire of the paver, and the problem that the asphalt is easy to adhere to the tire of the paver is solved by coating a layer of isolation protective layer on the tire of the paver.
(4) Compacting
Firstly, carrying out static pressure 1-2 times by adopting a double-steel-wheel road roller, wherein the rolling speed in the process is 1-2km/h; then rolling for 2-3 times by using a vibration mode of a double-steel-wheel road roller, wherein the rolling speed in the process is 1-2km/h, and when rolling, a driving wheel of the double-steel-wheel road roller faces the paver to roll from the outer side of the paving material to the center so as to improve the compaction density of the asphalt pavement; and selecting a steel cylinder type roller or a vibration roller with closed vibration, wherein the rolling speed in the process is 1.5-4km/h, and the rolling is not less than 2 times until no obvious wheel tracks exist.
(5) Open traffic
And after the pavement spreading layer of the asphalt mixture is naturally cooled to the surface temperature of less than 30 ℃, the traffic can be opened. When the traffic needs to be opened in advance, water can be sprayed to cool and reduce the temperature of the road surface.
Namely, the emergency engineering of paving and opening is carried out, the layer to be paved is naturally cooled to below 50 ℃, and the layer can be opened for other vehicles after being opened for 4 hours.
(6) Acceptance check
The asphalt mixing plant should control the quality of the low-temperature asphalt mixture production process according to the procedures specified in the current technical Specification for road asphalt pavement construction (JTG F40).
Example 2 differs from example 1 in that: the modified asphalt comprises 110 parts of No. 70 matrix asphalt, 50 parts of styrene-butadiene-styrene triblock copolymer, 22 parts of waste automobile tire rubber powder and 20 parts of C11-C17 high-boiling-point hydrocarbon mixture; the concrete slurry comprises 80 parts of cement, 30 parts of fly ash, 5 parts of bentonite, 95 parts of broken stone, 15 parts of modified calcium oxide, 20 parts of cellulose fiber, 15 parts of sodium methyl silicate, 16 parts of triethanolamine and 140 parts of water; 25 parts of organic montmorillonite and 30 parts of molecular sieve.
Example 3 differs from example 1 in that: the modified asphalt comprises 105 parts of No. 70 matrix asphalt, 48 parts of styrene-butadiene-styrene triblock copolymer, 25 parts of waste automobile tire rubber powder and 18 parts of C11-C17 high-boiling-point hydrocarbon mixture; the concrete slurry comprises 75 parts of cement, 28 parts of fly ash, 4 parts of bentonite, 92 parts of broken stone, 14 parts of modified calcium oxide, 21 parts of cellulose fiber, 16 parts of sodium methyl silicate, 15 parts of triethanolamine and 135 parts of water; 22 parts of organic montmorillonite and 28 parts of molecular sieve.
Example 4 differs from example 1 in that: no organic montmorillonite is added.
Example 5 differs from example 1 in that: no molecular sieve was added.
The test blocks are collected from the asphalt pavement which is constructed in the embodiment and are respectively marked as a test block 1, a test block 2, a test block 3, a test block 4 and a test block 5, and then the performance parameters such as compressive strength and the like are detected, and the detection structure is as follows:
| marshall stability (LKn) | 7 day compressive strength (MPa) | 7 days rupture strength (MPa) | |
| |
36 | 32 | 26.9 |
| Test Block 2 | 40 | 29 | 27.8 |
| Test Block 3 | 36 | 33 | 26.2 |
| Test Block 4 | 38 | 29 | 28.3 |
| |
37 | 28 | 27.6 |
TABLE 1
In the table, the Marshall stability is detected according to T0709-2011, the 7-day compressive strength is detected according to T0506-2005, and the 7-day flexural strength is detected according to T0506-2005; from the data in table 1 it can be analyzed: this bituminous paving has good structural strength and stability.
In examples 1-5, samples were collected during paving, labeled as sample 1, sample 2, sample 3, sample 4, and sample 5, and then the flue gas was collected under heating at 210 ℃, and the organic substances in the flue gas were analyzed as shown in the following table:
| n-decane (mg/kg) | Hexadecane (mg/kg) | Benzaldehyde (mg/kg) | Tetramethylbenzene (mg/kg) | |
| |
0.12 | 0.14 | 0.18 | 0.16 |
| Sample 2 | 0.13 | 0.18 | 0.16 | 0.18 |
| Sample 3 | 0.15 | 0.17 | 0.15 | 0.13 |
| Sample 4 | 4.3 | 4.8 | 0.16 | 0.17 |
| Sample No. 5 | 0.16 | 0.15 | 6.1 | 7.3 |
TABLE 2
In table 2, it is shown that the organic montmorillonite and the molecular sieve are added to the asphalt mixture to well inhibit organic matters in flue gas, such as n-decane, hexadecane, benzaldehyde, and tetramethylbenzene, and to improve the working environment during asphalt pavement construction.
Example 6
In the embodiment, the release agent spraying mechanism comprises a protective cover 1, a soft brush 2, an adjusting plate 3 and a transmission structure;
the protective cover 1 is fixedly arranged on the outer side of the top of a tire of the paver, and a separant storage cavity is formed in the side wall of the protective cover 1;
the soft brush 2 is fixedly connected with the protective cover 1, bristles of the soft brush 2 are in sliding contact with the top of a tire of the paver, liquid guide holes are formed in the bristles of the soft brush 2 along the axial direction of the bristles, and one ends of the liquid guide holes are communicated with the isolating agent storage cavity;
the adjusting plate 3 is arranged in the isolating agent storage cavity in a sliding mode and divides the isolating agent storage cavity into a liquid storage part 5 and an adjusting part 6, and the liquid storage part 5 is communicated with the liquid guide holes;
the transmission structure is connected between a rotating shaft of a tire of the paver and the adjusting plate 3 and is used for intermittently changing the relative size between the liquid storage part 5 and the adjusting part 6.
In this embodiment: when the paver is in the work progress, the tire of paver rotates, then the tire of paver comes the transmission through the pivot that links to each other with it, make the transmission structure operation, the transmission structure then intermittent type makes regulating plate 3 move in storing up the separant intracavity, so that the volume of stock solution portion 5 reduces once every period, regulating part 6 is then relative increase, come to impress the asphalt separant in stock solution portion 5 in the drain hole, brush hair through soft brush 2 and the tire installation cooperation mode of paver make even the paining of asphalt separant on the tire of paver, form one deck isolation protective layer. And because the surface tension of the asphalt separant and the aperture design of the liquid guide hole are small, and the aperture of the liquid guide hole can be 1-2mm, when the paver does not operate, the liquid outlet of the liquid guide hole can not lead out the asphalt separant.
Based on the scheme, a cavity can be further arranged in the side wall of the protective cover 1, and the transmission structure comprises an intermittent transmission part, a traction part and a speed reducer 7;
the intermittent transmission part is arranged in the mounting cavity and is used for intermittent transmission;
the traction part is connected between the intermittent transmission part and the adjusting plate 3 and is used for driving the adjusting plate 3 to move;
the speed reducer 7 is connected between a rotating shaft of a tire of the paver and the intermittent transmission part and used for reducing speed.
When the paver is in the construction process, the tire of the paver rotates, the tire of the paver is transmitted through the rotating shaft connected with the tire of the paver, the rear reducer 7 operates under the driving of the rotating shaft and performs speed reduction to greatly reduce the operating speed of the intermittent transmission part, and the speed reduction multiple of the reducer 7 can be 30-40 times, but is not limited to the speed reduction multiple and can be adjusted according to the actual situation; the back intermittent drive part drives intermittently to make the traction part act once every a period of time (30-40 minutes), the adjusting plate 3 moves in the isolating agent storage cavity to make the volume of the liquid storage part 5 reduce once every a period of time, the adjusting part 6 is relatively increased to press the asphalt isolating agent in the liquid storage part 5 into the liquid guide hole, and the brush hair of the soft brush 2 and the tire of the paver are installed and matched to make the asphalt isolating agent evenly coated on the tire of the paver to form an isolating and protecting layer.
The intermittent transmission part comprises a power input shaft 8 freely penetrating to the outside of the protective cover 1, a connecting groove is formed in a low-speed output shaft of the speed reducer 7, and the power input shaft 8 is movably inserted into the connecting groove and then fixed through a locking unit.
The intermittent transmission part also comprises a driving sector gear 9 which is rotatably arranged in the mounting cavity and a driven circular gear 10 which is meshed with the driving sector gear 9, the radius of the driving sector gear 9 is smaller than that of the driven circular gear 10, the power input shaft 8 is connected between the driving sector gear 9 and the speed reducer 7, and the driven circular gear 10 is connected with the traction part.
In the rotating process of the tire of the paver, the driving sector gear 9 is driven to slowly rotate through the power input shaft 8 after the speed of the speed reducer is reduced, the driven circular gear 10 rotates for a certain angle at intervals, the speed is further reduced through the radius design between the driving sector gear 9 and the driven circular gear 10, the adjusting plate 3 is stably moved through the traction part, and the soft brush 2 is used for uniformly coating an isolation protective layer on the surface of the tire of the paver. When the paver finishes paving and needs to drive away from a construction site, the power input shaft 8 and the low-speed output shaft of the speed reducer 7 are separated from transmission connection through the locking unit, and the isolating agent spraying mechanism stops running.
The adopted locking unit comprises a locking hole, a locking groove and a locking column 11; the locking hole is formed in the side wall of the low-speed output shaft of the speed reducer 7 and communicated with the connecting groove;
the locking groove is formed in the side wall of the power input shaft 8 and is communicated with the locking hole in an aligning mode;
one end of the locking column 11 is inserted into the locking groove to be fixed after passing through the locking hole.
Further, the locking unit further comprises a handle 12, and the handle 12 is fixedly connected to the side wall of the power input shaft 8 and is coplanar with the locking groove.
One end of the locking column 11 penetrates through the locking hole and then is inserted into the locking groove, so that the low-speed output shaft of the speed reducer 7 is quickly in transmission connection with the power input shaft 8, and the speed reducer 7 drives the driving sector gear 9 to operate; when one end of the locking column 11 is moved out of the locking groove, the low-speed output shaft of the speed reducer 7 is separated from the power input shaft 8 in transmission connection, and the driving sector gear 9 cannot be driven to run by the speed reducer 7.
The handle 12 is convenient for a worker to hold so as to stabilize the power input shaft 8, and one end of the locking column 11 can be quickly moved out of or into the locking groove so as to adjust the connection relation between the low-speed output shaft of the speed reducer 7 and the power input shaft 8; meanwhile, the handle 12 also plays a role in positioning, when the power input shaft 8 rotates to enable the power input shaft 8 and the locking column 11 to be located in the same plane, at the moment, the locking hole is aligned and communicated with the locking groove again, and one end of the locking column 11 can be rapidly and accurately moved into the locking groove again.
The traction part comprises a winding shaft 13 coaxially connected with the driven circular gear 10 and a traction rope 14 slidably mounted between the mounting cavity and the liquid storage part 5, one end of the traction rope 14 is fixed on the winding shaft and then wound for multiple circles, and the other end of the traction rope is connected with the adjusting plate 3 through a traction rod 4; when the paver is in forward construction, the speed reducer 7, the driving sector gear 9 and the driven circular gear 10 are used for sequentially transmitting, the winding shaft 13 is used for winding the traction rope 14, the adjusting plate 3 is moved in the isolating agent storage cavity through the traction rod 4, the asphalt isolating agent in the liquid storage part 5 is pressed into the liquid guide hole, and the asphalt isolating agent is uniformly coated on the tire of the paver by the bristles of the soft brush 2 and the tire installation and matching mode of the paver to form an isolating and protecting layer.
A plurality of guide wheels matched with the traction rope 14 can be rotatably arranged in the mounting cavity so as to enable the traction rope 14 to be stably carried out; meanwhile, a plurality of return springs 15 connected between the inner wall of the isolating agent storage cavity and the adjusting plate 3 can be arranged in the adjusting part 6, when the asphalt isolating agent needs to be supplemented in the liquid storage part 5, the low-speed output shaft of the speed reducer 7 can be disconnected with the power input shaft 8, the adjusting plate 3 can move reversely in the isolating agent storage cavity under the action of the return force of the return springs 15, and the winding shaft rotates reversely to pay off the traction rope 14; after the asphalt release agent is filled into the liquid storage part 5 through a liquid injection port formed in the side wall of the liquid storage part 5 far away from the adjusting part 6, the liquid injection port is sealed through a sealing plug.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The low-temperature asphalt construction process is characterized by comprising the following steps of:
(1) Cleaning road surface
Cleaning a pavement and planning a construction guide line on the pavement;
(2) Mixing of asphalt mixture
Mixing the modified asphalt and the concrete slurry in proportion in a stirrer, and stirring for 12-18min at the rotating speed of 850-950 r/min;
(3) Paving machine
Uniformly spreading the mixture in a planned guide line on the road surface by a spreading machine, wherein the spreading speed is controlled to be 1-3m/min, and the spreading temperature is controlled to be 80-100 ℃; wherein, the tire surface of the paver is evenly sprayed with a layer of isolation protection layer every 30-40 min;
(4) Compacting
Sequentially carrying out primary pressing, secondary pressing and final pressing in a static pressure or vibration rolling mode;
(5) Open traffic
The paved asphalt pavement is naturally cooled to be lower than 30 ℃, and then the traffic can be opened.
2. The low-temperature asphalt construction process according to claim 1, characterized in that: the rolling speed in the initial pressing process is 1-2km/h, the rolling speed in the re-pressing process is 1.5-3km/h, and the rolling speed in the final pressing process is 1.5-4km/h.
3. The low-temperature asphalt construction process according to claim 1, characterized in that: in the re-pressing process, the driving wheel of the road roller faces the paver to roll from the outer side of the paved material to the center of the paved material.
4. The low-temperature asphalt construction process according to claim 1, characterized in that: in the step of mixing the asphalt mixture, a certain amount of mixture of organic montmorillonite and molecular sieve is added into a stirrer.
5. The low-temperature asphalt construction process according to claim 1, characterized in that: the tire cooperation of paver is provided with separant spraying mechanism, and separant spraying mechanism includes:
the protective cover is fixedly arranged on the outer side of the top of the tire of the paver, and a separant storage cavity is formed in the side wall of the protective cover;
the soft brush is fixedly connected with the protective cover, bristles of the soft brush are in sliding contact with the top of a tire of the paver, liquid guide holes are formed in the bristles of the soft brush along the axial direction of the bristles of the soft brush, and one ends of the liquid guide holes are communicated with the isolating agent storage cavity;
the adjusting plate is arranged in the separant storage cavity in a sliding manner and divides the separant storage cavity into a liquid storage part and an adjusting part, and the liquid storage part is communicated with the liquid guide holes;
and the transmission structure is connected between a rotating shaft and an adjusting plate of a tire of the paver and is used for intermittently changing the relative size between the liquid storage part and the adjusting part.
6. The low-temperature asphalt construction process according to claim 5, characterized in that: can also install the chamber in the protection casing lateral wall, transmission structure includes:
the intermittent transmission part is arranged in the mounting cavity and is used for intermittent transmission;
the traction part is connected between the intermittent transmission part and the adjusting plate and is used for driving the adjusting plate to move;
and the speed reducer is connected between the rotating shaft of the tire of the paver and the intermittent transmission part and is used for reducing the speed.
7. The low-temperature asphalt construction process according to claim 6, characterized in that: the intermittent transmission part comprises a power input shaft freely penetrating to the outside of the protective cover, a connecting groove is formed in a low-speed output shaft of the speed reducer, and the power input shaft is movably inserted into the connecting groove and then fixed through the locking unit.
8. The low-temperature asphalt construction process according to claim 7, characterized in that: the locking unit includes:
the locking hole is formed in the side wall of the low-speed output shaft of the speed reducer and communicated with the connecting groove;
the locking groove is formed in the side wall of the power input shaft and is communicated with the locking hole in an aligning mode;
and one end of the locking column penetrates through the locking hole and then is inserted into the locking groove to be fixed.
9. The low-temperature asphalt construction process according to claim 8, characterized in that: the locking unit further comprises a handle which is fixedly connected to the side wall of the power input shaft and is coplanar with the locking groove.
10. The low-temperature asphalt construction process according to claim 7, characterized in that: the intermittent transmission part further comprises a driving sector gear and a driven circular gear, the driving sector gear is rotatably arranged in the installation cavity, the driven circular gear is meshed with the driving sector gear, the radius of the driving sector gear is smaller than that of the driven circular gear, the power input shaft is connected between the driving sector gear and the speed reducer, and the driven circular gear is connected with the traction part.
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| CN202210772830.0A CN115162111B (en) | 2022-06-30 | 2022-06-30 | Low-temperature asphalt construction process |
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| CN202210772830.0A CN115162111B (en) | 2022-06-30 | 2022-06-30 | Low-temperature asphalt construction process |
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Cited By (1)
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| CN116949888A (en) * | 2023-07-31 | 2023-10-27 | 四川川交路桥有限责任公司 | Pavement low-carbon asphalt construction process |
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| CN115162111B (en) | 2024-08-06 |
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