CN107386037A - A kind of compaction technology based on asphalt compactingproperties - Google Patents
A kind of compaction technology based on asphalt compactingproperties Download PDFInfo
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- CN107386037A CN107386037A CN201710594794.2A CN201710594794A CN107386037A CN 107386037 A CN107386037 A CN 107386037A CN 201710594794 A CN201710594794 A CN 201710594794A CN 107386037 A CN107386037 A CN 107386037A
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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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/22—Binder incorporated in hot state, e.g. heated bitumen
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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
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- 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
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of compaction technology based on asphalt compactingproperties, it comprises the following steps：1) asphalt first pressing temperature is determined；2) the final pressure temperature of asphalt is determined using compactingproperties experimental method；3) determine effectively to roll the time；4) determine to roll mode；5) determine to roll parameter；The present invention considers the compacting characteristics and change of temperature field rule of asphalt, and by rationally determining the final pressure temperature of asphalt and effectively rolling the time, proposition may insure the compaction technology that asphalt is fully compacted, and ensure that compactness meets to require.
Description
Technical field
It is particularly a kind of based on asphalt compactingproperties the invention belongs to bituminous paving compaction technology technical field
Compaction technology.
Background technology
Earlier period damage occurs for China's bituminous paving, often due to caused by compacting deficiency.Compaction process is improved, is ensured mixed
It is to improve the key of Bituminous Pavement Construction quality to close material fully compacting.At present, in order to improve the performance of bituminous paving, reduce
Earlier period damage, a collection of new technology is promoted the use of, including Superpave and GTM Asphalt Mixture Designs method, warm-mixed asphalt mix
Material technology, Applied of Asphalt Pavement Recycle Technique etc. are closed, while the new material such as rubber powder modified asphalt, SBS modified pitch is in large area
Promote the use of.
How new material, new technology are successfully applied in bituminous paving, the quality control of construction technology and work progress
It is key link therein.Current highway Asphalt Pavement Construction Technique specification, to the construction technology and quality control of bituminous paving
Standard is made that general regulation.As the requirement of construction quality standard and owner for Asphalt Pavement Construction Quality management is continuous
Improve, as the continuous application of new material, new technology to the key technology in work progress and Quality Control Links, it is necessary to be subject to
Renewal and optimization, more adapt to the development of Modern Traffic construction.
The compacting in the compaction technology and asphalt of bituminous paving is needed in terms of for construction technology and quality control
It is improved in terms of the contact of characteristic and environmental factor.For the compaction technology of bituminous paving, generally using traditional head and the tail phase
File segmentation compaction technology even, i.e., carried out using the rolling method of first pressing, multiple pressure and final pressure, rolling apparatus three workspaces
Roll.This compaction technology does not account for the influence of mix type and environmental factor to rolling effect, while in cryogenic conditions
Under, it is end to end to roll mode it is difficult to ensure that the temperature that rolls of multiple pressure and final pressure meets to require.Consider different mix types
With influence of the cementitious matter type to consolidation effect, while environmental factor is considered, including environment temperature, sub-layer temperature, wind speed etc.
Influence to consolidation effect, compaction technology and associated technical parameters are adjusted, be to ensure that compactness meets desired key factor.
In addition, in current work progress, show up temperature and the paving material of asphalt are often paid close attention to, for pitch
The final pressure temperature of compound is usually ignored.Actually if the final pressure temperature of asphalt is unsatisfactory for requiring, even if using
Big Compaction Effort again, asphalt also are difficult to be compacted, it is ensured that final pressure temperature meets requirement, reasonable disposition construction machinery and ginseng
Number, it is to ensure that compactness meets desired important step.
Asphalt is viscoelastic material, and the compactingproperties of different types of pitch performance are different.Therefore, having must
Will be according to the compactingproperties of asphalt, it is determined that rational compaction technology, it is ensured that compactness meets requirement, reduces bituminous paving
Earlier period damage.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of applying based on asphalt compactingproperties
Work compaction technology, it considers the compacting characteristics and change of temperature field rule of different pitches mix type, by rationally determining
The final pressure temperature of asphalt and effectively roll the time, propose to may insure the compaction technology that asphalt is fully compacted,
Ensure that compactness meets to require.
The present invention solves its technical problem and is achieved through the following technical solutions：
A kind of compaction technology based on asphalt compactingproperties, it is characterised in that：Comprise the following steps：
1) asphalt first pressing temperature is determined：
Asphalt first pressing temperature is determined according to engineering practical experience or viscosity-temperature curve；
2) the final pressure temperature of asphalt is determined using following compactingproperties experimental method：
A. prepared by asphalt：Needed according to construction, choose asphalt and determined most according to mixing proportion design method
Good asphalt content simultaneously prepares test specimen raw material；
B. shaping test piece：Initial forming temperature is determined according to engineering practical experience or viscosity-temperature curve, with 10 DEG C for step-length,
Forming temperature is gradually reduced, bitumen mixture specimen is molded using rotational forming instrument, each forming temperature is molded 3-5 examination
Part；
C. the voidage of bitumen mixture specimen is determined：Bulk specific gravity of the test specimen under each forming temperature is surveyed,
And calculate average void fraction；
D. final pressure temperature is determined：According to the Design Air Voids of asphalt, the average void under a certain forming temperature
When rate is more than Design Air Voids 50%, the previous forming temperature for determining this forming temperature is final pressure temperature；
3) determine effectively to roll the time：
According to effectively theory is rolled, decline rule by surveying roller compaction process Asphalt Mixture temperature at different conditions
Rule, determines that different type asphalt reasonably effectively rolls the time.
4) determine to roll mode：
Mode is alternately rolled using steel roller and pneumatic-tired rollers successively to carry out bottom surface layer, middle surface layer and superficial layer
Trailing type back and forth rolls；
5) determine to roll parameter；
Roll according to asphalt type, first pressing temperature, final pressure temperature and effectively the time and determine to roll mode, roll speed
Degree, number of rolling and roll bout length；And mode is rolled to being carried out to bottom surface layer, middle surface layer and superficial layer using step 4)
Segmentation rolls.
Moreover, described asphalt is rubber powder modified asphalt compound, at the beginning of the rubber powder modified asphalt compound
Beginning forming temperature is 170 DEG C, and its Design Air Voids is 4%, and the final pressure temperature of rubber powder modified asphalt compound is not less than 120 DEG C.
Moreover, described asphalt is SBS I-D modified asphalt mixtures, the SBS I-D modified pitch mixing
170 DEG C of the initial forming temperature of material, its Design Air Voids are not less than for the final pressure temperature of 4%, SBS I-D modified asphalt mixtures
110℃。
Moreover, described asphalt is AH-70 asphalt compounds, the AH-70 asphalt compound
150 DEG C of initial forming temperature, its Design Air Voids are not less than 90 DEG C for the final pressure temperature of 4%, AH-70 asphalt compounds.
Moreover, the concrete mode that the trailing type to bottom surface layer asphalt back and forth rolls is：
A first pressing is rolled using pneumatic-tired rollers immediately following paver；
B is pressed again to be followed pneumatic-tired rollers frequency low-amplitude closely using steel roller and rolls；
C pneumatic-tired rollers and steel roller alternately roll in the same scope of operation；
D final pressure receives light with steel roller static pressure.
Moreover, the concrete mode that the trailing type of the centering surface layer and superficial layer asphalt back and forth rolls is：
A first pressing is rolled using steel roller immediately following the paver frequency low-amplitude Hui Zhen that goes to shake；
B is pressed follow steel roller closely using pneumatic-tired rollers again；
C steel rollers and pneumatic-tired rollers alternately roll in the same scope of operation；
D final pressure receives light with steel roller static pressure.
Moreover, effectively being rolled the time in the step 3), the time of effectively rolling of particulate formula asphalt is 25-
30min；The time of effectively rolling of middle grain formula asphalt is 30-35min；For effectively rolling for coarse grain formula asphalt
Time is 30-35min.
Moreover, the step a that the centering surface layer and superficial layer asphalt alternately roll, which can be first pressing, uses steel
Roller, multiple pressure follow steel roller closely using pneumatic-tired rollers and rolled.
Moreover, the steel roller rolling speed control, in 2~3m/min, rolling apparatus requires that deadweight is not less than 13t,
Exciting force is not less than 71/35.3KN, and first pressing is completed in 2min.
Moreover, the pneumatic-tired rollers rolling speed control is in 2~3m/min.
Moreover, number of rolling in the step 5), for any in bottom surface layer, middle surface layer or superficial layer asphalt
One layer roll middle steel roller, the pass summation of pneumatic-tired rollers is six to eight times.
The advantages of the present invention are：
1st, the present invention is the compaction technology based on asphalt compactingproperties, by laboratory test, changes forming temperature,
The Air Voids of Asphalt Mixtures of different pitches type is surveyed, determines the final pressure temperature of asphalt, proposes to mix based on pitch
Expect the final pressure temperature of compactingproperties, the construction machinery configuration and the determination of construction parameter to bituminous paving have directive significance, lead to
The final pressure temperature of control asphalt is crossed, the compactness that asphalt is effectively ensured meets to require.
2nd, the present invention is the compaction technology based on asphalt compactingproperties, and incorporation engineering is actual, is paved in different
Thickness, roll under mode and number of rolling, asphalt temperature changing rule is surveyed, it is determined that effectively rolling time range；Root
The time effectively is rolled according to determination, the quantity of rolling apparatus is rationally determined, rolls bout length, speed and number of rolling, propose
Compaction technology based on asphalt compactingproperties.
3rd, the compaction technology of the invention based on asphalt compactingproperties, steel roller and pneumatic-tired rollers alternately grind
Pressure mode, the morning on pneumatic-tired rollers, pneumatic-tired rollers are better than steel roller to the consolidation effect of asphalt, use
Pneumatic-tired rollers, steel roller are rolled with alternately following closely, and pneumatic-tired rollers roll at a higher temperature, and wheel path can be used
What steel roller eliminated, pneumatic-tired rollers get over morning, better, the easier guarantor of compactness kept to the temperature of asphalt
Card.
4th, the compaction technology based on asphalt compactingproperties of the invention, mode is rolled by adjustment, improves and appears on the scene
Temperature, improve the initial compactness of paver, reduce the spreading speed of paver, and strengthen rolling, even if under cryogenic,
The speed of asphalt temperature decline can be equally reduced, is reached and temperature fall time same under hot conditions.
5th, the present invention considers the compacting characteristics and change of temperature field rule of asphalt, by rationally determining that pitch mixes
Close the final pressure temperature of material and effectively roll the time, proposition may insure the compaction technology that rubber powder asphalt is fully compacted, and protect
Compactness is demonstrate,proved to meet to require.
Brief description of the drawings
Fig. 1 is the relation test result figure of rubber powder modified asphalt compound forming temperature and voidage；
Fig. 2 is the relation test result figure of SBS I-D modified asphalt mixtures forming temperatures and voidage；
Fig. 3 is 70A asphalt viscosity-temperature curves；
Fig. 4 is the relation test result figure of AH-70 asphalts forming temperature and voidage.
Fig. 5 effectively rolls time curve for relevant with paving layer temperature and thickness and sub-layer temperature
Fig. 6 is middle surface layer asphalt temperature change curve under compacted state
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not limit
Qualitatively, it is impossible to which protection scope of the present invention is limited with this.
A kind of compaction technology based on asphalt compactingproperties, it comprises the following steps：
1st, asphalt first pressing temperature is determined：
Asphalt first pressing temperature is determined according to engineering practical experience or viscosity-temperature curve.
Asphalt is rubber powder modified asphalt compound, and first pressing temperature is set to 170 DEG C according to engineering practical experience.
The first pressing temperature of SBS I-D modified asphalt mixtures is set to 170 DEG C according to engineering practical experience.
The first pressing temperature of 70A Petroleum Asphalt Mixture for Road Lower determines according to viscosity-temperature curve, is calculated and mixed by viscosity-temperature curve
It it is 154.2 DEG C~160.2 DEG C with temperature, compacting temperature is 141.7 DEG C~147.2 DEG C.With reference to《Asphalt highway construction technology
Specification》Regulation of (JTG F40-2004) the 5.2.2 clauses on asphalt construction temperature, it is determined that asphalt used is mixed
It is 160 DEG C to close temperature, and first pressing temperature is 150 DEG C.
2nd, the final pressure temperature of asphalt is determined using following compactingproperties experimental method：
2.1 rubber powder modified asphalt final pressure temperature determine：
A, prepared by asphalt：Needed according to construction, choose asphalt and prepare test specimen raw material according to grading.Glue
The technical indicator of powder-modified asphalt such as table 1.
The rubber powder modified asphalt testing result of table 1
The grading curve and performance parameter of rubber powder modified asphalt compound such as table 2 and table 3.
The asphalt mixture gradation of table 2
The Performance Test on Asphalt Mixture result of table 3
B, shaping test piece：The initial forming temperature of rubber powder modified asphalt compound is set to 170 DEG C according to engineering practical experience,
With 10 DEG C for step-length, forming temperature is gradually reduced, rubber powder modified asphalt compound test specimen is molded using rotational forming instrument, it is each
Forming temperature is molded 3 test specimens.
C, voidage is tested：Voidage of each test specimen under each forming temperature is measured, calculates average void fraction；In table 4
It is shown.
The relation of the rubber powder modified asphalt compound forming temperature of table 4 and voidage
D, final pressure temperature is determined：Rubber powder modified asphalt asphalt mixture design voidage is 4%, when flat under a certain forming temperature
When equal voidage is more than Design Air Voids 50%, i.e., when voidage is more than 6%, it is not less than more than Bituminous Pavement compactness
98% requirement, the previous forming temperature for determining this forming temperature are final pressure temperature.
Fig. 1 is the relation of rubber powder modified asphalt compound forming temperature and voidage.With the reduction of forming temperature, mixing
The voidage of material gradually increases, forming temperature be 120 DEG C when, voidage 5.3%, to forming temperature be 110 DEG C when, space
Rate increased dramatically, and reach 9.1%, it is thus determined that the final pressure temperature of rubber powder modified asphalt cannot be below 120 DEG C.
2.2 SBS I-D modified pitch final pressure temperature determine：
A, prepared by asphalt：Needed according to construction, choose asphalt and prepare test specimen raw material according to grading.This
It is raw material that embodiment, which chooses SBS I-D modified pitch,.The technical indicator of SBS I-D modified pitch such as table 5.
The SBSI-D modified pitch testing results of table 5
Grading curve and the performance parameter such as table 2 and table 6 of SBS I-D modified asphalt mixtures.
The Performance Test on Asphalt Mixture result of table 6
B, shaping test piece：The initial forming temperature of SBS I-D modified asphalt mixtures is set to 170 according to engineering practical experience
DEG C, with 10 DEG C for step-length, forming temperature is gradually reduced, molding middle grain formula SBS I-D modified pitch using rotational forming instrument mixes
Material test specimen is closed, each forming temperature is molded 4 test specimens.
C, voidage is tested：The voidage of each test specimen is measured, calculates average void fraction, SBS I-D modified asphalt mixtures
The relation of forming temperature and voidage, as shown in table 7.
The relation of the SBSI-D modified asphalt mixtures forming temperature of table 7 and voidage
D, final pressure temperature is determined：The Design Air Voids of SBS I-D modified asphalt mixtures are 4%, when a certain measurement temperature
Under voidage when being more than Design Air Voids 50%, i.e., voidage is more than 6%, is not less than more than Bituminous Pavement compactness
98% requirement, the previous forming temperature for determining this forming temperature are final pressure temperature.
Fig. 2 is the relation of SBS I-D modified asphalt mixtures forming temperatures and voidage.With the reduction of forming temperature,
The voidage of compound gradually increases, forming temperature be 110 DEG C when, voidage 5.5%, to forming temperature be 100 DEG C when,
Voidage is 6.5%, more than Bituminous Pavement critical air void, it is thus determined that the end of SBS I-D modified asphalt mixtures
Pressure temperature cannot be below 110 DEG C.
The final pressure temperature of 2.3 AH-70 Petroleum Asphalt Mixture for Road Lower determines：
A, prepared by asphalt：Needed according to construction, choose asphalt and prepare test specimen raw material according to grading.
The technical indicator of AH-70 bi tumenf orr oads such as table 8.
The AH-70 bi tumenf orr oad testing results of table 8
The grading curve and performance parameter of AH-70 Petroleum Asphalt Mixture for Road Lower such as table 2 and table 9.
The Performance Test on Asphalt Mixture result of table 9
B, shaping test piece：The initial forming temperature of AH-70 Petroleum Asphalt Mixture for Road Lower according to initial forming temperature according to
Viscosity-temperature curve determines.As shown in Figure 3, it is calculated by viscosity-temperature curve and mixes and stirs temperature as 154.2 DEG C~160.2 DEG C, compacting temperature
Spend for 141.7 DEG C~147.2 DEG C.With reference to《Standard specification for construction and acceptance of highway asphalt pavement》(JTG F40-2004) 5.2.2 clauses close
In the regulation of asphalt construction temperature, it is determined that asphalt mixture mixing temperature used is 160 DEG C, initial forming temperature is
150℃。
With 10 DEG C for step-length, forming temperature is gradually reduced, molding middle grain formula 70A roads oil using rotational forming instrument drips
Blue or green compound test specimen, each forming temperature are molded 4 test specimens.
C, voidage is tested：The voidage of each test specimen is measured, calculates average void fraction, SBS I-D modified asphalt mixtures
The relation of forming temperature and voidage, as shown in table 10.
The relation of the AH-70 asphalts forming temperature of table 10 and voidage
D, final pressure temperature is determined：The Design Air Voids of AH-70 asphalts are 4%, the sky under a certain measurement temperature
When gap rate is more than Design Air Voids 50%, i.e., when voidage is more than 6%, it is not less than 98% more than Bituminous Pavement compactness
Requirement, the previous forming temperature for determining this forming temperature is final pressure temperature.
Fig. 4 is the relation of AH-70 asphalts forming temperature and voidage.With the reduction of forming temperature, compound
Voidage gradually increase, forming temperature be 90 DEG C when, voidage 5.8%, to forming temperature be 80 DEG C when, voidage is
6.1%, it is thus determined that the final pressure temperature of AH-70 asphalts cannot be below 90 DEG C.
3) determine effectively to roll the time：
According to effectively time theory is rolled, declined by surveying roller compaction process Asphalt Mixture temperature at different conditions
Rule, determine that different type asphalt reasonably effectively rolls the time.
It is 120 DEG C according to the final pressure temperature of foregoing rubber powder modified asphalt compound, the end of SBS I-D modified asphalt mixtures
It is 110 DEG C to press temperature, and the final pressure temperature of AH-70 asphalt compounds is 90 DEG C.
Being drawn by the actual measurement to asphalt temperature field, under loose paving state, temperature declines quickly asphalt,
Drop to 120 DEG C of average used times 17.4min from 170 DEG C, in practice of construction, asphalt bears many times of rolling apparatus
Roll, the decrease speed of temperature is slower than under loose paving state.Mode is rolled by adjustment, appearance temperature is improved, even in low temperature
Under the conditions of, the speed of asphalt temperature decline can be equally reduced, is reached and temperature fall time same under hot conditions.
Therefore, the Wen Duxiajiang rules by field measurement asphalt in roller compaction process, it is determined that when effectively rolling
Between it is as follows：
For particulate formula asphalt, the superficial layer of making bituminous paving is generally used for, it is 25- effectively to roll the time
30min；For middle grain formula asphalt, the middle surface layer of making bituminous paving is generally used for, it is 30- effectively to roll the time
35min；For coarse grain formula asphalt, the bottom surface layer of making bituminous paving is generally used for, it is 30- effectively to roll the time
35min。
3rd, determine to roll mode：
Mode alternately is rolled in the number of rolling of step 3) using steel roller and pneumatic-tired rollers and is rolled under the time
Trailing type is carried out to bottom surface layer, middle surface layer and superficial layer successively back and forth to roll.
The concrete mode that the trailing type of 3.1 pairs of bottom surface layer asphalts back and forth rolls is：
A first pressing is rolled using pneumatic-tired rollers immediately following paver；
B is pressed again to be followed pneumatic-tired rollers frequency low-amplitude closely using steel roller and rolls；
C pneumatic-tired rollers and steel roller alternately roll in the same scope of operation；
D finally receives light with steel roller.
The concrete mode that 3.2 trailing types to superficial layer and middle surface layer asphalt back and forth roll is：
A first pressing is rolled using steel roller immediately following the paver frequency low-amplitude Hui Zhen that goes to shake；
B is pressed follow steel roller closely using pneumatic-tired rollers again；
C steel rollers and pneumatic-tired rollers alternately roll in the same scope of operation；
D finally receives light with steel roller.
The step a for carrying out alternately rolling to bottom surface layer asphalt in step 4) can be that first pressing uses pneumatic-tired rollers.
Specifically roll mode and consider influence of the cryogenic conditions to asphalt, summarize such as table 11.
The different structure layer of the present invention of table 11 and mix type roll mode
4th, determine to roll parameter；
The rolling speed of recommendation such as table 12, it is determined that bituminous paving roll mode after, it is reasonable to be determined according to rolling speed
Roll length.Calculating process, parameter and result such as table 13.
The reasonable rolling speed of the road roller of table 12 (km/h)
Recommended parameter in the asphalt work progress of table 13
By taking the roller compaction construction of Tianjin section as an example：
Certain section asphalt pavement construction, superficial layer are 4cm particulate formula SBS I-D asphalts (AC-13)；Middle surface layer is
Grain formula rubber powder asphalt (AC-20) in 6cm；Bottom surface layer is AH-70 Petroleum Asphalt Mixture for Road Lower (ATB-30).Construct season
30 DEG C of atmospheric temperature average out to is saved, wind-force is 2-3 levels, width of roadway 15m, combines using two pavers and paves.
Following construction parameter is determined according to the above content of the invention：
Surface layer first pressing temperature is 170 DEG C in it is determined that, and final pressure temperature is 120 DEG C, and it is 30min effectively to roll the time；
It is 170 DEG C to determine superficial layer first pressing temperature, and final pressure temperature is 110 DEG C, and it is 25min effectively to roll the time；
It is 150 DEG C to determine bottom surface layer first pressing temperature, and final pressure temperature is 90 DEG C, and it is 30min effectively to roll the time；
The bottom surface layer mode of rolling is：First pass glues roller and rolls and (completed in 2min), while steel roller
Rolled immediately following the pneumatic-tired rollers high frequency high-amplitude Hui Zhen that goes to shake, to eliminate wheelmark, the alternating for forming steel wheel and rubber tire rolls.Roll time
Numerical control system is at 6-8 times.
The middle surface layer mode of rolling is：First pass is rolled using steel roller immediately following the paver frequency low-amplitude Hui Zhen that goes to shake
(being completed in 2min), second time gluing roller rolls immediately following steel roller, and the alternating for forming steel wheel and rubber tire rolls, most
Light is received by steel roller afterwards.Number of rolling is controlled at 6-8 times.
The superficial layer mode of rolling is：First pass is rolled using steel roller immediately following the paver frequency low-amplitude Hui Zhen that goes to shake
(being completed in 2min), second time gluing roller rolls immediately following steel roller, and the alternating for forming steel wheel and rubber tire rolls, eventually
Pressure receives light by steel roller.Number of rolling is controlled at 6-8 times.
Rolling speed：Steel roller and the control of pneumatic-tired rollers rolling speed require certainly in 2.5m/min, rolling apparatus
It is not less than 13t again, exciting force is not less than 71/35.3KN, and first pressing is completed in 2min.The control of pneumatic-tired rollers rolling speed exists
2.5m/min.Roll bout length：Superficial layer 40m, middle surface layer 45m, bottom surface layer 45m.
Although disclosed embodiments of the invention and accompanying drawing, those skilled in the art can manage for the purpose of illustration
Solution, do not departing from the present invention and spirit and scope of the appended claims in, it is various replace, change and modifications all be it is possible,
Therefore the scope of the present invention is not limited to embodiment and accompanying drawing disclosure of that.
Claims (11)
- A kind of 1. compaction technology based on asphalt compactingproperties, it is characterised in that：Comprise the following steps：1) asphalt first pressing temperature is determined：Asphalt first pressing temperature is determined according to engineering practical experience or viscosity-temperature curve；2) the final pressure temperature of asphalt is determined using following compactingproperties experimental method：A. prepared by asphalt：Needed according to construction, choose asphalt and determine optimal drip according to mixing proportion design method Blue or green dosage simultaneously prepares test specimen raw material；B. shaping test piece：Initial forming temperature is determined according to engineering practical experience or viscosity-temperature curve, with 10 DEG C for step-length, gradually Forming temperature is reduced, bitumen mixture specimen is molded using rotational forming instrument, each forming temperature is molded 3-5 test specimen；C. the voidage of bitumen mixture specimen is determined：Bulk specific gravity of the test specimen under each forming temperature is surveyed, and is counted Calculate average void fraction；D. final pressure temperature is determined：According to the Design Air Voids of asphalt, when the average void fraction under a certain forming temperature is big When Design Air Voids 50%, the previous forming temperature for determining this forming temperature is final pressure temperature；3) determine effectively to roll the time：According to effectively theory is rolled, decline rule by surveying roller compaction process Asphalt Mixture temperature at different conditions, really Determine different type asphalt and reasonably effectively roll the time.4) determine to roll mode：Alternately mode is rolled using steel roller and pneumatic-tired rollers successively to follow bottom surface layer, middle surface layer and superficial layer Formula back and forth rolls；5) determine to roll parameter；According to asphalt type, first pressing temperature, final pressure temperature and effectively roll the time determine rolling speed, number of rolling and Roll bout length；And rolled using the mode that rolls of step 4) to carrying out segmentation to bottom surface layer, middle surface layer and superficial layer.
- 2. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：Described pitch Compound is rubber powder modified asphalt compound, and the initial forming temperature of the rubber powder modified asphalt compound is 170 DEG C, and it is designed Voidage is 4%, and the final pressure temperature of rubber powder modified asphalt compound is not less than 120 DEG C.
- 3. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：Described pitch Compound is SBSI-D modified asphalt mixtures, and 170 DEG C of the initial forming temperature of the SBSI-D modified asphalt mixtures, it sets Count voidage and be not less than 110 DEG C for the final pressure temperature of 4%, SBSI-D modified asphalt mixtures.
- 4. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：Described pitch Compound is AH-70 asphalt compounds, and 150 DEG C of the initial forming temperature of the AH-70 asphalt compound, it is designed Voidage is that the final pressure temperature of 4%, SBSI-D modified asphalt mixtures is not less than 90 DEG C.
- 5. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：The step 3) In effectively roll the time, particulate formula asphalt effectively to roll the time be 25-30min；Middle grain formula asphalt has It is 30-35min that effect, which rolls the time,；Time of effectively rolling for coarse grain formula asphalt is 30-35min.
- 6. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：It is described to bottom surface The concrete mode that back and forth rolls of trailing type of layer asphalt is：A first pressing is rolled using pneumatic-tired rollers immediately following paver；B is pressed again to be followed pneumatic-tired rollers frequency low-amplitude closely using steel roller and rolls；C pneumatic-tired rollers and steel roller alternately roll in the same scope of operation；D final pressure receives light with steel roller static pressure.
- 7. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：The centering face The concrete mode that back and forth rolls of trailing type of layer and superficial layer asphalt is：A first pressing is rolled using steel roller immediately following the paver frequency low-amplitude Hui Zhen that goes to shake；B is pressed follow steel roller closely using pneumatic-tired rollers again；C steel rollers and pneumatic-tired rollers alternately roll in the same scope of operation；D final pressure receives light with steel roller static pressure.
- A kind of 8. compaction technology based on asphalt compactingproperties according to claim 6, it is characterised in that：It is described right The step a that middle surface layer and superficial layer asphalt alternately roll can be that first pressing uses steel roller, and multiple pressure uses glue Roller follows pneumatic-tired rollers closely.
- A kind of 9. compaction technology based on asphalt compactingproperties according to claim 1, it is characterised in that：The steel The control of roller rolling speed is in 2~3m/min, and rolling apparatus requires that deadweight is not less than 13t, and exciting force is not less than 71/ 35.3KN, and first pressing is completed in 2min.
- A kind of 10. compaction technology based on asphalt compactingproperties according to claim 1, it is characterised in that：It is described Pneumatic-tired rollers rolling speed is controlled in 2~3m/min.
- 11. the compaction technology according to claim 1 based on asphalt compactingproperties, it is characterised in that：The step 5) number of rolling in, road is pressed for the middle steel wheel that rolls of any one floor in bottom surface layer, middle surface layer or superficial layer asphalt Machine, the pass summation of pneumatic-tired rollers are six to eight times.
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| CN112305205A (en) * | 2020-10-20 | 2021-02-02 | 北京市政建设集团有限责任公司 | Method for paving double layers of asphalt pavement step by step, temperature determination method and experimental model |
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