CN109608093B - A kind of Recycled Asphalt Pavement and preparation method thereof - Google Patents
A kind of Recycled Asphalt Pavement and preparation method thereof Download PDFInfo
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- CN109608093B CN109608093B CN201811560422.9A CN201811560422A CN109608093B CN 109608093 B CN109608093 B CN 109608093B CN 201811560422 A CN201811560422 A CN 201811560422A CN 109608093 B CN109608093 B CN 109608093B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of Recycled Asphalt Pavements, comprise the following components in parts by weight: 38-42 parts of coarse aggregate, 45-55 parts of old asphalt mixture, 3-5 parts of Iron Ore Powder, 1.2-2.5 parts of pitch and 2-3.5 parts of regenerative agent additionally provide the preparation method of above-mentioned Recycled Asphalt Pavement: (1) preparing regenerative agent；(2) reclaimed asphalt mixture is prepared；(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), heating stirring is to get Recycled Asphalt Pavement.Recycled Asphalt Pavement of the invention the problem of effective solution reclaimed asphalt mixture is easy to produce cracking, can be applied to the laying of the high class pavements such as through street, trunk roads while taking into account high old asphalt mixture utilization rate.
Description
Technical field
The invention belongs to building castoff application technology as the second resource fields, and in particular to a kind of high performance regeneration asphalt is mixed
Solidifying soil and preparation method thereof.
Background technique
Asphalt pavement material regeneration is will to overhaul or waste and old old asphalt concrete pavement, by digging, recycling, break
Broken, screening, then new aggregate appropriate, new pitch are added, mix becomes the regeneration asphalt with good pavement performance and mixes again
Material.
Will appear Some Disease after a certain period of time for bituminous pavement service and influence its service level, according to every 12 years into
It goes again making (actual useful year is lower than design period), the waste asphalt mixture (RAP) generated every year is more than 20,000,000
Ton.Waste asphalt mixture is mainly bituminous cements and the composition that gathers materials, and the waste asphalt mixture of enormous amount obtains not at present
To making full use of, not only polluted underground water also wastes in waste asphalt mixture the direct landfill disposal of waste asphalt mixture
Pitch and building stones.Therefore, waste asphalt mixture is improved in the application of newly-built road, reduces the exploitation of non-renewable resources, no
Only be conducive to environmental protection, can also reduce construction investment.
CN106223152A discloses a kind of particulate formula high-performance Recycled Asphalt Pavement for being easy to construct, including standard again
The collection material screen that aperture is 6.3mm is added on the basis of sieve, the Recycled Asphalt Pavement is less than using nominal maximum aggregate size
The fine aggregate of 13.2mm is mineral aggregate, and is forming micro- gap gradation in continuous grading curve between 4.75mm sieve pore and 6.3mm sieve pore.
The patent makes reclaimed asphalt mixture have high temperature Rut resistance deformation performance, while its antifatigue and endurance quality and low temperature
Performance is all enhanced, but the utilization rate of waste asphalt mixture is lower in the patent, only 20-35%, is still had a large amount of
Waste asphalt mixture is not fully utilized.
CN105837099A discloses a kind of composite regenerated bituminous concrete, by following components preparation by weight
At: RAP30 parts of 0-5mm Recycled Asphalt Pavement, RAP25 parts of 5-10mm Recycled Asphalt Pavement, 10-30mm regeneration asphalt coagulation
RAP28 parts native, 10-30mm newly gathers materials 15 parts, and 2 parts of miberal powder, 1.5 parts of cement, 3.5-4.2 parts of emulsified asphalt and regenerative agent 0.5-
1.5 part.The invention is composite regenerated to Milled asphalt materials progress by adding a certain proportion of regenerative agent, improves regenerating mixture
Material property, while improving the utilization rate of waste asphalt mixture, but the invention belongs to cold-mix asphalt mixture, only fit
It shares in the superficial layer of the surface layer of branch and its following road, branch, is not used to the high class pavements such as through street, trunk roads.
The volume of waste asphalt mixture RAP is generally not more than 30% in plant-mix heat recycle technology at present, and is rarely used in
Highway surfaces layer, the main reason is that being hardened and being become fragile due to waste asphalt mixture RAP ageing of asphalt, viscoelasticity can become
Difference makes heat regeneration asphalt mixture be easy to produce cracking (temperature cracking and fatigue cracking) problem, and old material volume is higher, cracking
Problem is more serious.Therefore, how under the premise of improving old material volume, high performance Recycled Asphalt Pavement is obtained, is current
The hot spot of waste asphalt mixture research and utilization.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of high performance Recycled Asphalt Pavement and its preparation sides
Method.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight:
38-42 parts of coarse aggregate；
45-55 parts of old asphalt mixture；
3-5 parts of Iron Ore Powder；
1.2-2.5 parts of pitch and
2-3.5 parts of regenerative agent.
Preferably, the partial size of the coarse aggregate is 26.5-31.5mm.
It is further preferred that the crush values of the coarse aggregate are 18-25%, water absorption rate 1.5-2.0%.
Preferably, the old asphalt mixture includes: by weight percentage
Partial size is the old asphalt mixture 28-36% of 13.2-19mm；
Partial size is the old asphalt mixture 15-22% of 4.75-9.5mm；
Partial size is the old asphalt mixture 30-40% of 0.6-2.36mm；
Partial size is less than the old asphalt mixture of 0.15mm, surplus.
Preferably, the partial size of the Iron Ore Powder is less than 0.15mm；It is further preferably 0.075-0.15mm.
Preferably, the pitch is SBS modified pitch, SBR modified pitch or rubber modified asphalt.
Preferably, the regenerative agent, including used oil, aromatic naphtha and modification infusorial earth, the used oil, aromatic naphtha and
The mass ratio of modification infusorial earth is 45-65:8-15:3-10.
It is further preferred that the partial size of the modification infusorial earth is 100-500nm.
In addition, the present invention provides the preparation methods of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and (1-3)/4 formula ratio is mixed, is heated to 135 DEG C, system
Obtain regenerative agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of pitch, (1-3)/4 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), heating stirring, i.e.,
Obtain Recycled Asphalt Pavement.
Preferably, heating stirring described in step (3) are as follows: stir 45-80s at 170-185 DEG C.
The invention has the benefit that
(1) present invention is matched using coarse aggregate, old asphalt mixture, miberal powder, pitch and regenerative agent, has been obtained a kind of high
The Recycled Asphalt Pavement of performance, take into account high old asphalt mixture utilization rate while, effective solution regeneration asphalt is mixed
The problem of material is easy to produce cracking is closed, can be applied to the laying of the high class pavements such as through street, trunk roads.
(2) high performance Recycled Asphalt Pavement of the invention, by the gradation between coarse aggregate and old asphalt mixture,
The selection of regenerative agent obtains the performance of Recycled Asphalt Pavement of the invention compared to traditional Recycled Asphalt Pavement properties
To optimization, meanwhile, it can effectively absorb the NO in vehicle exhaustX, have the effect of good air cleaning.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be described in further detail.
The present invention is not construed as limiting raw materials used source, and unless otherwise specified, raw material of the present invention is general at present
Logical commercial goods.
Modification infusorial earth of the invention is prepared using following methods, specifically:
(1) shell cleaned and dried is taken, is crushed, sieving, the shell coarse powder that partial size is 0.05mm is obtained；
(2) the dibastic sodium phosphate solution that shell coarse powder concentration made from step (1) is 2.5% is eluted 3 times, obtains band liquid
Shell coarse powder；
(3) the band liquid shell coarse powder for obtaining step (2), after keeping the temperature 15min at 500 DEG C, is drenched with 50 DEG C of tap water
It washes 5 times, dries to get active conch meal；
(4) 5 parts by weight of active conch meal for taking step (4) to obtain, mix with the diatomite of 2 parts by weight, stir 10min
Afterwards, keep the temperature 15min at 450 DEG C, be cooled to 60 DEG C, be ground to partial size be 100-500nm to obtain the final product.
The used oil that the present embodiment is selected: 20 DEG C of viscosity are 35mPas, and 25 DEG C of density are 0.876g/cm3。
Embodiment 1
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight: 38 parts of coarse aggregate, Bituminous concrete surface mixing
45 parts of material, 3 parts of Iron Ore Powder, 1.2 parts of SBS modified pitch and 2 parts of regenerative agent；
Wherein,
The partial size of the coarse aggregate is 26.5mm, crush values 18%, water absorption rate 1.5%；
In the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 28%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 15%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 30%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm；
The partial size of the Iron Ore Powder is 0.075mm；
In the regenerative agent, the partial size of modification infusorial earth is 100nm, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 45:8:3.
The preparation method of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and 1/4 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of modified pitch, 3/4 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), is stirred at 170 DEG C
80s is mixed to get Recycled Asphalt Pavement.
Embodiment 2
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight: 42 parts of coarse aggregate, Bituminous concrete surface mixing
55 parts of material, 5 parts of Iron Ore Powder, 2.5 parts of SBS modified pitch and 3.5 parts of regenerative agent；
Wherein,
The partial size of the coarse aggregate is 31.5mm, crush values 25%, water absorption rate 2%；
In the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 36%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 22%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 40%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm；
The partial size of the Iron Ore Powder is 0.15mm；
In the regenerative agent, the partial size of modification infusorial earth is 500nm, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 65:15:10.
The preparation method of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and 3/4 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of modified pitch, 1/4 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), is stirred at 185 DEG C
45s is mixed to get Recycled Asphalt Pavement.
Embodiment 3
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight: 39 parts of coarse aggregate, Bituminous concrete surface mixing
46 parts of material, 3.1 parts of Iron Ore Powder, 1.3 parts of SBS modified pitch and 2.1 parts of regenerative agent；
Wherein,
The partial size of the coarse aggregate is 31.5mm, crush values 18%, water absorption rate 1.5%；
In the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 36%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 22%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 40%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm；
The partial size of the Iron Ore Powder is 0.075mm；
In the regenerative agent, the partial size of modification infusorial earth is 150nm, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 50:9:4.
The preparation method of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and 1/2 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of modified pitch, 1/2 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), is stirred at 180 DEG C
50s is mixed to get Recycled Asphalt Pavement.
Embodiment 4
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight: 41 parts of coarse aggregate, Bituminous concrete surface mixing
54 parts of material, 4.9 parts of Iron Ore Powder, 2.4 parts of SBS modified pitch and 3.4 parts of regenerative agent；
Wherein,
The partial size of the coarse aggregate is 31.5mm, crush values 25%, water absorption rate 2.0%；
In the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 28%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 15%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 30%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm；
The partial size of the Iron Ore Powder is 0.15mm；
In the regenerative agent, the partial size of modification infusorial earth is 450nm, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 60:16:9.
The preparation method of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and 3/4 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of modified pitch, 1/4 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), is stirred at 175 DEG C
60s is mixed to get Recycled Asphalt Pavement.
Embodiment 5
A kind of high performance Recycled Asphalt Pavement, comprises the following components in parts by weight: 40 parts of coarse aggregate, Bituminous concrete surface mixing
50 parts of material, 3.2 parts of Iron Ore Powder, 2.3 parts of SBS modified pitch and 2.3 parts of regenerative agent；
Wherein,
The partial size of the coarse aggregate is 31.5mm, crush values 20%, water absorption rate 1.8%；
In the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 33%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 18%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 33%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm；
The partial size of the Iron Ore Powder is 0.15mm；
In the regenerative agent, the partial size of modification infusorial earth is 450nm, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 55:12.5:6.5.
The preparation method of above-mentioned high performance Recycled Asphalt Pavement, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and 1/4 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modified silicon of modified pitch, 3/4 formula ratio is added
Regenerative agent made from diatomaceous earth and step (1) continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), is stirred at 175 DEG C
55s is mixed to get Recycled Asphalt Pavement.
Comparative example 1
The difference of this comparative example and embodiment 5 is that the old asphalt mixture is the Bituminous concrete surface of partial size 13.2-19mm
Mixture.
Comparative example 2
The difference of this comparative example and embodiment 5 is that the old asphalt mixture is the old drip of partial size 4.75-9.5mm
Green mixture.
Comparative example 3
The difference of this comparative example and embodiment 5 is that the old asphalt mixture is the old drip of partial size 0.6-2.36mm
Green mixture accounts for 33%.
Comparative example 4
The difference of this comparative example and embodiment 5 is that the old asphalt mixture is the old drip that partial size is less than 0.15mm
Green mixture.
Comparative example 5
The difference of this comparative example and embodiment 5 is, in the old asphalt mixture,
Partial size is that the old asphalt mixture of 13.2-19mm accounts for 37%；
Partial size is that the old asphalt mixture of 4.75-9.5mm accounts for 23%；
Partial size is that the old asphalt mixture of 0.6-2.36mm accounts for 42%,
Surplus is the old asphalt mixture that partial size is less than 0.15mm.
Comparative example 6
The difference of this comparative example and embodiment 5 is that the partial size of modification infusorial earth is 550nm in the regenerative agent, described
The mass ratio of used oil, aromatic naphtha and modification infusorial earth is 40:16:11.
Comparative example 7
The difference of this comparative example and embodiment 5 is that the modification infusorial earth of the regenerative agent is not added with during the preparation process
Conch meal.
Comparative example 8
The difference of this comparative example and embodiment 5 is that the regenerative agent is used oil.
Comparative example 9
The difference of this comparative example and embodiment 5 is that the regenerative agent is aromatic naphtha.
Comparative example 10
The difference of this comparative example and embodiment 5 is that the regenerative agent is the used oil and aromatic hydrocarbons that mass ratio is 55:12.5
Oil.
Comparative example 11
The difference of this comparative example and embodiment 5 is that the Iron Ore Powder is 2.5 parts, partial size 0.15-0.3mm.
According to the correlation of Ministry of Communications ministry standard JTGE20-2011 " highway engineering pitch and Asphalt Mixture Experiment regulation "
Technical requirements verify the performance of the Recycled Asphalt Pavement of 1-5 of the embodiment of the present invention by following tests.
One, high-temperature stability
The high-temperature stability data of the Recycled Asphalt Pavement of 1-5 of the embodiment of the present invention are shown in Table 1.
The high-temperature stability data of 1 Recycled Asphalt Pavement of table
| Group | Dynamic stability (secondary/mm) |
| Embodiment 1 | 5475 |
| Embodiment 2 | 6328 |
| Embodiment 3 | 5940 |
| Embodiment 4 | 6388 |
| Embodiment 5 | 8425 |
| Comparative example 1 | 2890 |
| Comparative example 2 | 2984 |
| Comparative example 3 | 3016 |
| Comparative example 4 | 3215 |
| Comparative example 5 | 3459 |
| Comparative example 11 | 3398 |
As shown in Table 1, Recycled Asphalt Pavement of the invention has preferable high-temperature stability, remote to meet " bituminous pavement
Construction technique normalizing " requirement to bituminous pavement high temperature rutting resistance.
Two, low-temperature cracking-resistance
The low-temperature cracking-resistance data of the Recycled Asphalt Pavement of 1-5 of the embodiment of the present invention are shown in Table 2.
The low-temperature cracking-resistance data of 2 Recycled Asphalt Pavement of table
As shown in Table 2, Recycled Asphalt Pavement of the invention has preferable low-temperature cracking-resistance, and the remote specification that meets is to pitch
The requirement of road surface low temperature anti-deformation.
Three, water stability
The water stability data of the Recycled Asphalt Pavement of 1-5 of the embodiment of the present invention are shown in Table 3.
The water stability data of 3 Recycled Asphalt Pavement of table
| Group | MS/% | TSR/% |
| Embodiment 1 | 96.78 | 92.89 |
| Embodiment 2 | 95.69 | 93.56 |
| Embodiment 3 | 97.18 | 95.38 |
| Embodiment 4 | 98.01 | 94.68 |
| Embodiment 5 | 98.89 | 97.26 |
As shown in Table 3, Recycled Asphalt Pavement of the invention has preferable water stability, and the remote specification that meets is to asphalt road
The requirement of face durability.
Four, air test is purified
Track plate is formed using the Recycled Asphalt Pavement of embodiment 1-5 and comparative example 6-7, track board size is length
7 groups of track plates are placed in closed tails assay equipment respectively, are passed through vehicle exhaust by 30cm, wide 30cm, high 5cm, pass through
After a period of time, using the variation of gas content in exhaust analyzer test equipment, Recycled Asphalt Pavement of the invention is analyzed
Purification air effect, test result is as shown in table 4.
The purification air test result of 4 Recycled Asphalt Pavement of table
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example 6 | Comparative example 7 |
| NOxPurifying rate % | 85.6 | 86.4 | 90.5 | 88.9 | 94.8 | 56.4 | 46.8 |
| HC purifying rate % | 17.3 | 16.9 | 18.7 | 20.8 | 32.6 | 4.6 | 5.2 |
| CO purifying rate % | 7.6 | 8.9 | 7.3 | 9.0 | 11.8 | 2.6 | 2.7 |
| CO2Purifying rate % | 30.7 | 28.6 | 27.8 | 25.6 | 38.8 | 0.9 | 1.3 |
From table 4, it can be seen that Recycled Asphalt Pavement of the invention can absorb NO in vehicle exhaustX, HC compound, CO etc.
Gas, wherein to NOXPurification efficiency it is the most obvious, purifying rate shows regeneration asphalt of the invention between 85.6-94.8%
Concrete can effectively purify air.
The above is only presently preferred embodiments of the present invention, not does any restrictions to the present invention, all according to invention skill
Art any simple modification substantially to the above embodiments, change and equivalent structural changes, still fall within the technology of the present invention
In the protection scope of scheme.
Claims (6)
1. a kind of Recycled Asphalt Pavement, which is characterized in that comprise the following components in parts by weight:
38-42 parts of coarse aggregate；
45-55 parts of old asphalt mixture；
3-5 parts of Iron Ore Powder；
1.2-2.5 parts of pitch and
2-3.5 parts of regenerative agent；
The old asphalt mixture includes: by weight percentage
Partial size is the old asphalt mixture 28-36% of 13.2-19mm；
Partial size is the old asphalt mixture 15-22% of 4.75-9.5mm；
Partial size is the old asphalt mixture 30-40% of 0.6-2.36mm；
Partial size is less than the old asphalt mixture of 0.15mm, surplus；
The partial size of the Iron Ore Powder is less than or equal to 0.15mm；
The regenerative agent, including used oil, aromatic naphtha and modification infusorial earth, the used oil, aromatic naphtha and modification infusorial earth
Mass ratio be 45-65:8-15:3-10；
The modification infusorial earth is prepared using following methods, specifically: (1) shell cleaned and dried is taken, is crushed, sieving, obtains
Partial size is the shell coarse powder of 0.05mm；(2) the dibastic sodium phosphate solution for being 2.5% by shell coarse powder concentration made from step (1)
Elution 3 times obtains band liquid shell coarse powder；(3) the band liquid shell coarse powder for obtaining step (2), after keeping the temperature 15min at 500 DEG C,
It is eluted 5 times, is dried to get active conch meal with 50 DEG C of tap water；(4) 5 weight of active conch meal for taking step (4) to obtain
Part, it is mixed with the diatomite of 2 parts by weight, after stirring 10min, keeps the temperature 15min at 450 DEG C, be cooled to 60 DEG C, be ground to partial size
For 100-500nm to obtain the final product.
2. Recycled Asphalt Pavement according to claim 1, which is characterized in that the partial size of the coarse aggregate is 26.5-
31.5mm。
3. Recycled Asphalt Pavement according to claim 2, which is characterized in that the crush values of the coarse aggregate are 18-
25%, water absorption rate 1.5-2.0%.
4. Recycled Asphalt Pavement according to claim 1, which is characterized in that the pitch be SBS modified pitch,
SBR modified pitch or rubber modified asphalt.
5. a kind of preparation method of the described in any item Recycled Asphalt Pavements of claim 1-4, which is characterized in that the system
Preparation Method, comprising the following steps:
(1) modification infusorial earth of used oil, aromatic naphtha and (1-3)/4 formula ratio is mixed, is heated to 135 DEG C, be made again
Raw agent；
(2) old asphalt mixture is heated to 105 DEG C, after stirring 25s, the modification infusorial earth of pitch, (1-3)/4 formula ratio is added
With regenerative agent made from step (1), continues to stir 10s, reclaimed asphalt mixture is made；
(3) coarse aggregate and Iron Ore Powder are sequentially added into reclaimed asphalt mixture made from step (2), heating stirring is to get again
Raw bituminous concrete.
6. preparation method according to claim 5, which is characterized in that heating stirring described in step (3) are as follows: in 170-
45-80s is stirred at 185 DEG C.
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| CN111693346A (en) * | 2020-06-15 | 2020-09-22 | 深圳市市政工程总公司 | Marshall test piece preparation method based on plant heat tracing recycled asphalt mixture |
| CN113135692B (en) * | 2020-07-31 | 2023-05-05 | 临沂兰城循环利用建材科技有限公司 | Preparation method of anti-aging modified asphalt concrete |
| CN113173738A (en) * | 2021-06-09 | 2021-07-27 | 上海繁荣道路建设工程有限公司 | Anti-rutting regenerated asphalt mixture, and preparation method and application thereof |
| CN115925324A (en) * | 2022-12-09 | 2023-04-07 | 山东省高速养护集团有限公司 | high-RAP plant-mixed AC-25 hot recycled asphalt mixture and preparation method thereof |
| CN116621507B (en) * | 2023-05-26 | 2024-04-02 | 无锡翔云道桥科技有限公司 | Recycled asphalt concrete and preparation method thereof |
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| EP2960294A1 (en) * | 2013-02-19 | 2015-12-30 | Jung Do Huh | Novel highly viscoelastic warm mix modifier composition and preparation method therefor, and new and regenerated warm mix modified asphalt concrete mixture composition and preparation method therefor |
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