CN105271950A - Foam warm mixing recycled asphalt mixture, preparation method and performance evaluation method - Google Patents
Foam warm mixing recycled asphalt mixture, preparation method and performance evaluation method Download PDFInfo
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- CN105271950A CN105271950A CN201510859928.XA CN201510859928A CN105271950A CN 105271950 A CN105271950 A CN 105271950A CN 201510859928 A CN201510859928 A CN 201510859928A CN 105271950 A CN105271950 A CN 105271950A
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a foam warm mixing recycled asphalt mixture, a preparation method and a performance evaluation method. The mixture is a mixture formed by recycled waste and a foam modified asphalt mixture. A lower milled material of an asphalt pavement is used as a raw material, no additional recycling agent is needed, the construction temperature can be reduced by 20 to 30 DEG C by utilizing foam asphalt and warm mixing technology, the energy consumption during the construction process is reduced, the resource is saved, the environment is protected, the finally prepared mixture can be reused for the lower layer of the asphalt pavement, various technical indexes can meet the requirement, and the preparation cost is reduced.
Description
Technical field
The present invention relates to a kind of asphalt for road, particularly relate to a kind of foam warm mix reclaimed asphalt mixture, preparation method and method of evaluating performance thereof.
Background technology
Department of Transportation has promulgated " Highway and Waterway transport energy savings medium-term and long-term plans outline ", requires to greatly develop green traffic transport system, the research and extension of the field of traffic science and technology of reinforcement high-efficiency environment friendly, weather close friend.In this context, warm-mixed asphalt technology is arisen at the historic moment.But in the application process of warm mix technology, most domestic Warm-Mix Bitumen Mixture still continues to use the method for design of hot-mix asphalt mixture, do not give full play to the advantage that warm-mixed asphalt technical energy saving reduces discharging.In existing old pavement transformation, maintenance process, old pavement material is given it up simultaneously, cause the pollution of environment.
Because the defect that above-mentioned existing ground surface material exists, the present inventor is based on being engaged in the practical experience and expertise that this type of product design manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, to founding a kind of novel foam warm mix reclaimed asphalt mixture, preparation method and method of evaluating performance thereof, it is made to have more practicality.Through constantly research, design, and through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
Main purpose of the present invention is, overcome the defect that existing ground surface material exists, and provide a kind of Novel bubble foam warm mix reclaimed asphalt mixture, preparation method and method of evaluating performance thereof, energy-saving and emission-reduction, thus be more suitable for practicality, and there is the utility value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to the foam warm mix reclaimed asphalt mixture that the present invention proposes, for regenerating the mixture of old material, foaming modifying pitch and new filling grain composition.
Aforesaid foam warm mix reclaimed asphalt mixture, the old material of described regeneration is bituminous pavement top milling material, is divided into thick milling material and thin milling material.Described thick milling material and thin milling material two kinds of mass ratios are 8:12; The old material bitumen aggregate ratio of described regeneration is 4.0% ~ 5.0%, and be preferably 4.6%, described new filling grain is consistent with the bitumen aggregate ratio of foaming modifying asphalt mixture and the bitumen aggregate ratio of the old material of described regeneration.
Aforesaid foam warm mix reclaimed asphalt mixture, gathers materials in described new filling grain and comprises the 4# that the 3# that the 2# that 1# expects, particle diameter is 5 ~ 10mm expects, particle diameter is 3 ~ 5mm expects, particle diameter the is 0 ~ 3mm material and breeze that particle diameter is 10 ~ 20mm.
Aforesaid foam warm mix reclaimed asphalt mixture, the proportional range of described thick milling material, thin milling material, 1# material, 2# material, 3# material, 4# material and breeze is 6 ~ 10:10 ~ 14:14.5 ~ 17.5:28.5 ~ 31.5:9:20.5 ~ 27:1.5.
The preparation method of foam warm mix reclaimed asphalt mixture, comprises following operation steps,
Step one: the preparation of foaming modifying pitch, carries out mechanical foaming process to SBS modifying asphalt;
Step 2: the preparation regenerating old material, sieved by bituminous pavement top milling material, choose the thick milling material of required grating and thin milling material, ratio is 8:12.
Step 3: the preparation of target product, prepares new filling grain and fully mixes with the old material of regeneration, add foaming modifying pitch prepared by step one, stir, obtain target product.
The preparation method of aforesaid foam warm mix reclaimed asphalt mixture, in described step one, the preparation condition of foaming modifying pitch is, SBS modifying asphalt is heated to 150 ~ 175 DEG C, be preferably 165 DEG C, foaming water amount accounts for 1 ~ 5% of SBS modifying asphalt consumption, be preferably 3%, the temperature of foaming water is 10 ~ 50 DEG C, is preferably normal temperature 30 DEG C.
The preparation method of aforesaid foam warm mix reclaimed asphalt mixture, under 130 ~ 140 DEG C of temperature condition, stir 90 ~ 120s in described step 3, preferred whipping temp is 135 DEG C.
The method of evaluating performance of foam warm mix reclaimed asphalt mixture, carries out compactibility evaluation test, the evaluation test of wrapping property and workability evaluation test to the foam warm mix reclaimed asphalt mixture of preparation.
Foam asphalt warm mix know-why:
In whole asphalt foaming process, chemical property does not change, just the temporary transient change of physical properties.When water droplet (foaming water, under envrionment temperature) when contacting with hard pitch (more than 140 DEG C), following process will be there is: hard pitch and water drops surface generation heat (energy) exchange, water droplet is heated to about 100 DEG C, produce vapor bubbles, cause volumetric expansion, pitch cooling simultaneously.Vapor bubbles is pressed in the external phase of pitch under a certain pressure; There is the pitch of a large amount of vapor bubbles to spray from nozzle along with melting, vapor expansion, thus make the pitch slightly cooled off form film like, and rely on the surface tension of film to be wrapped completely by bubble.Now, in vapor expansion process, opposing vapor pressure until reach a kind of equilibrium state, generally can be maintained the time of several seconds by the surface tension that asphalt membrane produces; The a large amount of bubbles produced in foaming process exist with the metastable form of one, and foam is easily vanished.Along with asphalt membrane cools the condensation with steam in bubble at normal temperatures, the equilibrium state of asphalt membrane surface tension and vapor pressure is broken, and finally causes bubble-break.
By technique scheme, foam warm mix reclaimed asphalt mixture of the present invention, preparation method and method of evaluating performance thereof at least have following advantages:
Pitch after foaming greatly reduces the viscosity of pitch, makes to gather materials also to wrap up in attached with the good mix of bituminous cements in lower temperature.After asphalt temperature reduces, the viscosity of pitch exceedes the cooled viscosity of hot-mix asphalt mixture on the contrary.The present invention with bituminous pavement cutting optimal milling material for raw material, and do not need additionally to add regenerator, construction temperature 20 ~ 30 DEG C can be reduced by the use of foamed asphalt and warm mix technology, reduce the energy consumption discharge of construction process, economize on resources, environmentally friendly, the compound finally prepared can be reused for the cutting optimal of bituminous pavement, each technical requirements all meets the demands, and reduces preparation cost.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technique means of the present invention, and can be implemented according to the content of specification sheets, be described in detail as follows below with preferred embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technique means reaching predetermined goal of the invention and take and effect, to the foam warm mix reclaimed asphalt mixture proposed according to the present invention, preparation method and its embodiment of method of evaluating performance, feature and effect thereof, be described in detail as follows.
Embodiment 1
First following material is prepared before preparing foam warm mix reclaimed asphalt mixture:
1, old material is regenerated: RAP1 material 80 parts (the thick milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 3.9%), RAP2 material 120 parts (the thin milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 4.6%);
2, newly pellet is added: 1# expects 210 parts, 2# expects 270 parts, 3# expects 70 parts, 4# expects 240 parts, breeze 10 parts;
3, foaming modifying pitch: SBS modifying asphalt 42 parts, foaming water 1.2 parts, foam asphalt production unit ensures maximum gas pressure 1000kPa, maximum hydraulic pressure 1000kPa, pitch pressure 1000kPa, adapts to asphalt temperature 140 ~ 200 DEG C, should in certain water consumption situation, continually can produce foam asphalt, and every batch of foam asphalt quality produced can reach 10 ~ 20kg.
Foam warm mix reclaimed asphalt mixture preparation process:
Step one, at indoor foaming modification pitch, is heated to 165 DEG C by SBS modifying asphalt, and the temperature of foaming water is 30 DEG C, and obtained foaming modification pitch is for subsequent use;
Step 2, prepares the old material of regeneration, is sieved by the milling material of bituminous pavement cutting optimal, choose the old material of the regeneration meeting Particle size requirements;
Step 3, by the abundant mix 30s under 135 DEG C of conditions that gathers materials in the old material of regeneration and new filling grain, is directly injected to foam warm mix modifying asphalt and mixes in pot, and the aggregate blending 120s with the old material of regeneration and new filling grain, adds breeze, mix 30s; Namely final foam warm mix reclaimed asphalt mixture is obtained.Wherein mix pot adopt match with foaming machine horizontally mix pot, horizontally mix the mix temperature that pot can meet 100 ~ 200 DEG C, and can continuously operate, ensure foam asphalt with gather materials fully wrap up in attached.
The foam warm mix reclaimed asphalt mixture mineral aggregate gradation of preparation is as shown in table 1.
Table 1 mineral aggregate gradation forms
Embodiment 2
First following material is prepared before preparing foam warm mix reclaimed asphalt mixture:
1, old material is regenerated: RAP1 material 80 parts (the thick milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 3.9%), RAP2 material 120 parts (the thin milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 4.6%);
2, newly pellet is added: 1# expects 190 parts, 2# expects 255 parts, 3# expects 70 parts, 4# expects 270 parts, breeze 10 parts;
3, foaming modifying pitch: SBS modifying asphalt 46 parts, foaming water 1.4 parts, foam asphalt production unit ensures maximum gas pressure 1000kPa, maximum hydraulic pressure 1000kPa, pitch pressure 1000kPa, adapts to asphalt temperature 140 ~ 200 DEG C, should in certain water consumption situation, continually can produce foam asphalt, and every batch of foam asphalt quality produced can reach 10 ~ 20kg.
Foam warm mix reclaimed asphalt mixture preparation process:
Step one, at indoor foaming modification pitch, is heated to 170 DEG C by SBS modifying asphalt, and the temperature of foaming water is 30 DEG C, and obtained foaming modification pitch is for subsequent use;
Step 2, prepares the old material of regeneration, is sieved by the milling material of bituminous pavement cutting optimal, choose the old material of the regeneration meeting Particle size requirements;
Step 3, by the abundant mix 30s under 135 DEG C of conditions that gathers materials in the old material of regeneration and new filling grain, is directly injected to foam warm mix modifying asphalt and mixes in pot, and the aggregate blending 120s with the old material of regeneration and new filling grain, adds breeze, mix 30s; Namely final foam warm mix reclaimed asphalt mixture is obtained.Wherein mix pot adopt match with foaming machine horizontally mix pot, horizontally mix the mix temperature that pot can meet 100 ~ 200 DEG C, and can continuously operate, ensure foam asphalt with gather materials fully wrap up in attached.
The foam warm mix reclaimed asphalt mixture mineral aggregate gradation of preparation is as shown in table 2.
Table 2 mineral aggregate gradation forms
Embodiment 3
First following material is prepared before preparing foam warm mix reclaimed asphalt mixture:
1, old material is regenerated: RAP1 material 80 parts (the thick milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 3.9%), RAP2 material 120 parts (the thin milling material of bituminous pavement cutting optimal, bitumen aggregate ratio about 4.6%);
2, newly pellet is added: 1# expects 175 parts, 2# expects 240 parts, 3# expects 70 parts, 4# expects 300 parts, breeze 10 parts;
3, foaming modifying pitch: SBS modifying asphalt 50 parts, foaming water 1.5 parts, foam asphalt production unit ensures maximum gas pressure 1000kPa, maximum hydraulic pressure 1000kPa, pitch pressure 1000kPa, adapts to asphalt temperature 140 ~ 200 DEG C, should in certain water consumption situation, continually can produce foam asphalt, and every batch of foam asphalt quality produced can reach 10 ~ 20kg.
Foam warm mix reclaimed asphalt mixture preparation process:
Step one, at indoor foaming modification pitch, is heated to 165 DEG C by SBS modifying asphalt, and the temperature of foaming water is 30 DEG C, and obtained foaming modification pitch is for subsequent use;
Step 2, prepares the old material of regeneration, is sieved by the milling material of bituminous pavement cutting optimal, choose the old material of the regeneration meeting Particle size requirements;
Step 3, by the abundant mix 30s under 135 DEG C of conditions that gathers materials in the old material of regeneration and new filling grain, is directly injected to foam warm mix modifying asphalt and mixes in pot, and the aggregate blending 120s with the old material of regeneration and new filling grain, adds breeze, mix 30s; Namely final foam warm mix reclaimed asphalt mixture is obtained.Wherein mix pot adopt match with foaming machine horizontally mix pot, horizontally mix the mix temperature that pot can meet 100 ~ 200 DEG C, and can continuously operate, ensure foam asphalt with gather materials fully wrap up in attached.
The foam warm mix reclaimed asphalt mixture mineral aggregate gradation of preparation is as shown in table 3.
Table 3 mineral aggregate gradation forms
Performance verification:
The foam warm mix reclaimed asphalt mixture each embodiment prepared carries out performance test:
Marshall Test: get foam warm mix reclaimed asphalt mixture and adopt that Marshall method is two-sided respectively hits real 75 shaping test pieces, mold temperature is 130 DEG C.Marshall Test is carried out with reference to " highway engineering pitch and Asphalt Mixture Experiment code " code requirement, test and the marshal piece of 130 DEG C of (unified mold temperature) compacted unders is placed in room temperature cooling demoulding after 12 hours, then carry out volumetric parameter test.Specific experiment the results are shown in Table 4.
Immersion Marshall test: carry out immersion Marshall test according to " highway engineering pitch and Asphalt Mixture Experiment code " code requirement, evaluates anti-water damage property, often organizes three parallel test specimens.Specific experiment the results are shown in Table 4.
Indirect tensile test on frozen-thaw: carry out indirect tensile test on frozen-thaw according to " highway engineering pitch and Asphalt Mixture Experiment code " code requirement, evaluates anti-water damage property, often organizes three parallel test specimens.Specific experiment the results are shown in Table 4.
Thimble test: carry out wheel tracking test according to " highway engineering pitch and Asphalt Mixture Experiment code " code requirement, evaluates high-temperature behavior, often organizes three parallel tests.Specific experiment the results are shown in Table 4.
Workability is tested: workability is evaluated by the gyratory compaction shearing stress that asphalt is shaping, and by measuring the force value needed for gyratory compaction angle, the maximum shear stress namely in gyratory compaction process, reacts the workability in compacting process.
Specific experiment operating process is as follows:
Asphalt as the inhomogeneous composite materials be made of a variety of materials, by mixing and stirring the Homogeneous phase mixing that can realize each composition material.In the process of mixing and stirring, at different levels gather materials progressively be uniformly distributed, pitch wraps up in attached gathering materials.As Warm-Mix Bitumen Mixture, relative to hot-mix asphalt mixture, should have and can mix and stir ability at lesser temps, this just claims to the workability of compound and workability.At present to asphalt workability, the general high temperature viscosity of bituminous cements that adopts characterizes indirectly, and viscosity is larger, and compound more not easily mixes and stirs, compacting.
But, in asphalt, form asphalt mastic by pitch and breeze to be wrapped in and to gather materials around, the fluidity determining of the asphalt mastic workability of compound, and adopt merely the viscosity-temperature curve determination mixture construction temperature of pitch cannot reflect the flow characteristics of asphalt mastic comprehensively.Meanwhile, viscosity, only can the mobility of relative evaluation pitch as an indirect indexes, intuitively cannot reflect the workability of compound.In the process of mixing and stirring, because different compounds has different gather materials frictional force and pitch force of cohesion, it is also not identical that it mixes and stirs resistance.Therefore, the size of mixing and stirring resistance can reflect workability to a certain extent.Obviously, the internal friction of compound and cohesion are larger, and its resistance mixed and stirred is larger, mixes and stirs in process and needs more energy support.
Mechanical foaming mode is adopted to reduce the mix of foam asphalt warm mix regenerating mixture and roll temperature, the construction workability of foaming water amount and compound has and contacts closely, this project adopts the gyratory compaction molding test specimen closer to on-the-spot rubber tire roller compaction process, use the maximum shear stress occurred in gyratory compaction molding test specimen process to evaluate the workability of compound, the maximum shear stress occurred is less, then its workability is better, and compound is more easily compacted.Testing program is as follows:
1. according to design level registration for gathering materials needed for 3 gyratory compaction moldings;
2. gather materials and place 10h in baking oven under 145 DEG C of conditions;
3. prepare the foam asphalt of 2%, 3% and 4% water consumption respectively, by foamed asphalt respectively with aggregate blending, produce the foam asphalt warm mix regenerating mixture of three water consumptions;
4. under 120 DEG C of conditions aging two hours;
5. gyratory compaction molding test specimen (300 times), record height and shearing stress.Specific experiment the results are shown in Table 4.
Wrap up in attached performance test: foam warm mix regeneration techniques reduces the mix temperature of modified asphalt mixture, how what need consideration to gather materials wraps up in attached degree, develop a kind of hydrophobicity performance wrapping up in attached asphalt membrane according to surface of aggregate, pass judgment on the aggregate water absorption being wrapped with asphalt membrane the test method that surface of aggregate pitch wraps up in attached situation.
Wrap up in the hydrophobicity performance of attached asphalt membrane according to surface of aggregate, pass judgment on surface of aggregate pitch with the aggregate water absorption being wrapped with asphalt membrane and wrap up in attached situation.The aggregate water absorption being wrapped with asphalt membrane is less, and it is better that it wraps up in attached performance.
Test principle: the aggregate water absorption being wrapped with asphalt membrane is less, it is better that it wraps up in attached performance, and vice versa.The water-intake rate that difference is gathered materials also has different, thus only can not pass judgment on that difference gathers materials with the aggregate water absorption being wrapped with asphalt membrane wrap up in attached sex differernce, wrap up in attached index (CI) so adopt the attached performance of wrapping up in of gathering materials evaluated.Wrapping up in attached index is with aggregate water absorption (A
j) deduct and be wrapped with the later water-intake rate (A of asphalt membrane
l), then calculate than upper aggregate water absorption.Formula is shown in following formula
Concrete test operation is as follows:
1) 5 parts of coarse aggregates (between 16mm-19mm) are prepared, each 2000g;
2) first part of immersion 1h, takes out and wipes surface drying, claim its quality, be designated as n;
3) gather materials first part of immersion placement oven drying, claims its dry weight, be designated as m;
4) the water-intake rate A gathered materials is calculated
j;
5) at 165 DEG C, baking oven for heating is placed 4 hours by second part;
6) by dry gather materials and SBS modifying asphalt carry out mix 60s;
7) its excess-three part places baking oven for heating one night at 135 DEG C;
8) these three parts are gathered materials carry out mix 60s with the foam asphalt of water consumption 2%, 3%, 4% respectively;
9) by being wrapped with gathering materials and gathering materials of foam asphalt being cooled to room temperature respectively of modifying asphalt, being respectively divided into two parts, being about 1000g;
10) take every part of quality, be designated as m
1-1, m
1-2, m
2-1, m
2-2, m
3-1, m
3-2, m
4-1, m
4-2;
11) soak 1h, wipes the coarse aggregate being wrapped with pitch to surface drying, take surface drying quality, be designated as n with dry towel
1-1, n
1-2, n
2-1, n
2-2, n
3-1, n
3-2, n
4-1, n
4-2;
12) the water-intake rate A of compound is calculated respectively
l;
13) attached index CI is wrapped up in calculating.Specific experiment the results are shown in Table 4.
Compactibility can be tested: compactibility adopts the density under initial gyratory compaction number of times as the standard of measurement compactibility.The gyratory compaction number of times of 92% relative density is reached than the compactibility energy characterizing warm mix with test specimen.
Compactibility adopts the density under initial gyratory compaction number of times as the standard of measurement compactibility.Under designed content of asphalt, prepare foam Warm-Mix Bitumen Mixture, under design compacting temperature condition, short ageing 2 hours, determines maximum theory density (G
mm).Under the shaping temperature condition of design, gyratory compaction N is carried out to test specimen
designsecondary, and the height of test specimen after recording each gyratory compaction, determine the bulk specific gravity of test specimen.Mixture temperature is down to lower than field compaction temperature 30 DEG C, gyratory compaction test specimen N
designsecondary, and the height of test specimen after recording each gyratory compaction, determine the bulk specific gravity of test specimen.For each gyratory compaction test specimen, calculate by following formula.
Wherein: %G
mmNfor the relative density after N gyratory compaction;
G
mbfor gyratory compaction N
designbulk specific gravity after secondary;
H
dfor gyratory compaction N
designheight of specimen after secondary;
H
nfor the height of specimen after gyratory compaction N time.
To each test specimen, record reaches the gyratory compaction number of times (92% represents the first pressing stage in actual compacting process) during relative density 92%.At the scene under compacting temperature condition, determine the average gyratory compaction number of times reaching 92% relative density.Under 30 DEG C conditions lower than field compaction temperature, determine the average gyratory compaction number of times reaching 92% relative density.With following formula determination gyratory compaction ratio.
Wherein: Ratio is gyratory compaction ratio;
(N
92)
t-30for under 30 DEG C of conditions lower than field compaction temperature, reach the gyratory compaction number of times of 92% relative density;
(N
92)
tfor under compacting temperature at the scene, reach the gyratory compaction number of times of 92% relative density.Specific experiment the results are shown in Table 4.
The compacting criteria of suggestion is that gyratory compaction ratio is less than or equal to 1.25.If gyratory compaction ratio is less than or equal to 1.25, then the compactness in construction rolling process can meet the demands, and namely warm mix effect is better, can implement.
Each test-results is as shown in table 4.
Table 4 each foam warm mix recycling asphalt mixtures performance test result
As can be seen from the above table, foam warm mix reclaimed asphalt mixture prepared by the present invention all can meet performance requriements, not only makes RAP material obtain regeneration, and reduces construction temperature, decreases the energy consumption discharge of construction.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (8)
1. a foam warm mix reclaimed asphalt mixture, is characterized in that: for regenerating the mixture of old material, foaming modifying pitch and new filling grain composition.
2. foam warm mix reclaimed asphalt mixture according to claim 1, is characterized in that: the old material of described regeneration is bituminous pavement top milling material, is divided into thick milling material and thin milling material.
3. foam warm mix reclaimed asphalt mixture according to claim 2, is characterized in that: described new filling grain comprises the 4# that the 3# that the 2# that 1# expects, particle diameter is 5 ~ 10mm expects, particle diameter is 3 ~ 5mm expects, particle diameter the is 0 ~ 3mm material and breeze that particle diameter is 10 ~ 20mm.
4. foam warm mix reclaimed asphalt mixture according to claim 3, is characterized in that: the proportional range of described thick milling material, thin milling material, 1# material, 2# material, 3# material, 4# material and breeze is 6 ~ 10:10 ~ 14:14.5 ~ 17.5:28.5 ~ 31.5:9:20.5 ~ 27:1.5.
5. the preparation method of foam warm mix reclaimed asphalt mixture, is characterized in that: comprise following operation steps,
Step one: the preparation of foaming modifying pitch, carries out mechanical foaming process to SBS modifying asphalt;
Step 2: the preparation regenerating old material, sieves bituminous pavement top milling material, chooses the thick milling material of required grating and thin milling material;
Step 3: the preparation of target product, prepares new filling grain and fully mixes with the old material of regeneration, add foaming modifying pitch prepared by step one, stir, obtain target product.
6. the preparation method of foam warm mix reclaimed asphalt mixture according to claim 5, it is characterized in that: the preparation condition of foaming modifying pitch described in described step one is, SBS modifying asphalt is heated to 130 ~ 185 DEG C, foaming water amount accounts for 1 ~ 8% of SBS modifying asphalt consumption, and the temperature of foaming water is 20 ~ 50 DEG C.
7. the preparation method of the foam warm mix reclaimed asphalt mixture according to claim 5 or 6, is characterized in that: under 120 ~ 145 DEG C of temperature condition, stir 90 ~ 120s in described step 3.
8. the method for evaluating performance of foam warm mix reclaimed asphalt mixture, is characterized in that: carry out compactibility evaluation test, the evaluation test of wrapping property and workability evaluation test to the foam warm mix reclaimed asphalt mixture of preparation.
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| CN105948813A (en) * | 2016-04-28 | 2016-09-21 | 河海大学 | Foamed warm-mix recycled asphalt mixture and preparation method thereof |
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| CN106145777A (en) * | 2016-06-29 | 2016-11-23 | 广州新粤交通技术有限公司 | Warm-mixed recycled asphalt mixture and preparation method thereof |
| CN106289682A (en) * | 2016-08-31 | 2017-01-04 | 沧州市市政工程股份有限公司 | A kind of evaluate Colophonium and the method and application thereof wrapping up in attached property of gathering materials |
| CN106630771A (en) * | 2017-01-07 | 2017-05-10 | 中铁十五局集团第五工程有限公司 | Highway foam asphalt mixture, and production process and detection method thereof |
| CN106988188A (en) * | 2017-05-18 | 2017-07-28 | 江苏道润工程技术有限公司 | The construction method and construction system of cold in place recycling |
| CN109765102A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt multi-step rotation debulking methods and its application |
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| CN106289682A (en) * | 2016-08-31 | 2017-01-04 | 沧州市市政工程股份有限公司 | A kind of evaluate Colophonium and the method and application thereof wrapping up in attached property of gathering materials |
| CN106289682B (en) * | 2016-08-31 | 2018-11-30 | 沧州市市政工程股份有限公司 | A kind of evaluation asphalt and aggregate wrap up in the method and its application of attached property |
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| CN109765102A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt multi-step rotation debulking methods and its application |
| CN109765102B (en) * | 2019-03-13 | 2021-06-25 | 长安大学 | Step-by-step rotary compaction method for asphalt mixture and application thereof |
| CN111537418A (en) * | 2020-04-27 | 2020-08-14 | 哈尔滨工业大学 | Method for evaluating grouting performance of cement asphalt composite concrete cementing material |
| CN111978012A (en) * | 2020-07-10 | 2020-11-24 | 苏州中恒通路桥股份有限公司 | Preparation method of novel warm-mixed asphalt mixture |
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