CN115403307A - Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof - Google Patents
Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof Download PDFInfo
- Publication number
- CN115403307A CN115403307A CN202211200045.4A CN202211200045A CN115403307A CN 115403307 A CN115403307 A CN 115403307A CN 202211200045 A CN202211200045 A CN 202211200045A CN 115403307 A CN115403307 A CN 115403307A
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- China
- Prior art keywords
- cold
- emulsified asphalt
- asphalt
- recycled
- recycling
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- 239000010426 asphalt Substances 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000004064 recycling Methods 0.000 claims abstract description 25
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 125000003118 aryl group Chemical group 0.000 claims abstract description 6
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 13
- 239000003607 modifier Substances 0.000 claims description 11
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 125000002091 cationic group Chemical group 0.000 claims description 5
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 17
- 230000008929 regeneration Effects 0.000 abstract description 11
- 238000011069 regeneration method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical class OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical group [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- -1 aromatic nitro compound Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical class OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003431 steroids Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses cold-recycling emulsified asphalt with a high proportion of recycled material utilization rate and a preparation method thereof, and relates to the technical field of asphalt recycling. The cold-recycling emulsified asphalt comprises the following components in percentage by mass: modifying agent: 3% -10%, emulsifier: 3% -10%, light aromatic naphtha: 1% -5%, matrix asphalt: 60-70% of water and 20-30% of water. The cold-recycled emulsified asphalt with high recycled material utilization rate has good regeneration effect, and the prepared regenerated asphalt mixture has good anti-rutting performance and high resilience modulus.
Description
Technical Field
The invention belongs to the technical field of asphalt recycling, and particularly relates to cold-recycling emulsified asphalt with a high proportion recycled material utilization rate and a preparation method thereof.
Background
The cold regeneration technology of emulsified asphalt is to crush old materials of original asphalt pavement, remix the materials according to a certain gradation requirement (or add part of new aggregates) and the like, and remix the materials with water, additives, emulsified asphalt and the like at normal temperature to form a new uniform mixture, so that the mixture becomes a layer of the pavement structure and meets a certain pavement performance. Compared with other regeneration types, the emulsified asphalt cold regeneration has the characteristics of wrapping type regeneration, flexible regeneration and large-proportion regeneration, and is particularly suitable for the regeneration of old materials of asphalt surface layers and the occasions of cold regeneration materials used for upper structural layers of pavements.
The cold regeneration of the emulsified asphalt is a complete set of solution for integrating the emulsifier, the emulsified asphalt, the design of the cold regenerated mixture of the emulsified asphalt, the selection of professional equipment, the field construction process and the like. The cold recycling of the emulsified asphalt commonly used on site can be carried out in plant mixing (mixing the mixture in a mixing station) and site recycling (milling and planning on site and mixing and paving on site simultaneously), the mixing amount of the old material of the cold recycling of the plant-mixed emulsified asphalt can be higher and is generally about 30% of the total mixture, most researches find that the mixing ratio of the old material cannot be increased due to the fact that the asphalt in the recycled material is seriously aged and wrapped by the recovery rate and cannot be fully combined with the emulsified asphalt in cold recycling, and in order to guarantee the quality, the mixing ratio of the old material cannot be increased under the conventional cold recycling emulsified asphalt system.
Disclosure of Invention
In view of the above, the invention aims to provide cold-recycling emulsified asphalt with a high proportion of recycled materials utilization rate and a preparation method thereof, which can enable the proportion of the mixing amount of old materials of cold recycling of plant-mixed emulsified asphalt to reach about 50%. The mixing proportion of the old material is increased, so that the material cost is greatly reduced, the pollution is reduced, and the outward transportation of the milled material, the exploitation of new material (new aggregate comes from a new mine) and the like are reduced.
The invention discloses cold-recycled emulsified asphalt with high utilization rate of a proportion of recycled materials, which comprises the following components: light aromatic naphtha, a cationic emulsifier, a modifier, water and base asphalt. The modifier comprises the following components in percentage by mass: 3% -10%, emulsifier: 3% -10%, light aromatic naphtha: 1% -5%, matrix asphalt: 60-70% of water and 20-30% of water. The cold-recycling emulsified asphalt with high recycled material utilization rate has a good recycling effect, and the prepared recycled asphalt mixture has good anti-rutting performance and high resilience modulus.
The light aromatic naphtha comprises compounds of the formula above 99% purity and a density of 0.87-0.9 (15 deg.C, g/cm) 3 ). The molecular structure of the main compound of the light aromatic naphtha is shown in a formula 1. Wherein the other impurities include halogenated aromatic hydrocarbon, aromatic nitro compound, aromatic alcohol, aromatic acid, steroid, etc. and total amount is not more than 1%.
The modifier is SBR latex doped with macroporous cation resin, wherein the macroporous cation resin is cation exchange resin with acrylic acid copolymer having carboxylic acid group (-COOH). The mixing amount of the modifier accounts for 10-20% of the total amount of the modifier, and the modifier can be mixed together at normal temperature for later use. Wherein the macroporous cation resin has stable physical and chemical properties, the ion exchange resin is a polymer with corresponding functional groups, and the conventional sodium ion exchange resin generally has a large amount of sodium ions to reduce Ca 2+ 、Mg 2+ The ion content enhances the using effect of the cationic emulsifier. The solid content of the macroporous cation resin is more than or equal to 95 percent.
The light aromatic hydrocarbon naphtha is a light component, and the emulsified asphalt is modified by adding the SBR latex doped with the macroporous cation resin, so that the light aromatic hydrocarbon naphtha can be well blended into the emulsified asphalt without influencing the modification and demulsification time of the emulsified asphalt. The dosage of the medicine is required to be 1-5%. The key point for solving the problem that the proportion of the old material of the emulsified asphalt cold-recycling mixture cannot be increased is to blend soluble light components into the old material to recover the flexibility of the aged asphalt in the old material.
The cationic emulsifier, the modifier, the water and the matrix asphalt are produced into modified emulsified asphalt according to a general method for producing the modified emulsified asphalt, and after the modified emulsified asphalt is at normal temperature, the light aromatic hydrocarbon naphtha with a given proportion is added and mixed uniformly. The cold recycled emulsified asphalt with high utilization rate of the recycled materials is obtained.
Detailed Description
Examples 1 to 4
The cold-recycled emulsified asphalt of examples 1 to 4 was prepared according to the formulation of table 1.
Table 1 four examples formulation table (total mass 100%)
Comparative example: the comparative example is a commercial finished cationic emulsified asphalt, which is applied to the existing emulsified asphalt cold regeneration engineering in a large scale. The formula is not available. The binder testing project indices are shown in the last column of table 2. The binder test item indicators for the examples and comparative examples are shown in table 2.
TABLE 2 comparison of indexes of binder test items of examples and comparative examples of emulsified asphalt for cold recycling
The method is characterized in that a recycled Asphalt Pavement material (RAP) is selected to meet the specification requirement, namely the recycled Asphalt Pavement material is dried, the material composition is stable, the agglomeration and blocking phenomenon are avoided, the maximum particle size is not more than 37.5mm, and the detection items and the quality requirement are shown in Table 3.
TABLE 3 technical requirements for recycled asphalt pavement materials
One gradation was selected, as shown in table 4 below.
TABLE 4 Cold-recycled emulsified asphalt mixture design grading Range
Blending of new and old materials is carried out, and the emulsified asphalt for cold recycling of examples 1-4 and comparative example is added. The porosity of the bituminous mixture compacted marshall test pieces was uniformly controlled to 10% to give examples 1-4 and comparative examples having 10.2%, 10.5%, 9.8%, 10.5%, and 11.3% bitumen loading, respectively. Wherein the proportion of the new and old aggregates in the asphalt mixtures prepared in examples 1 to 4 is 1 (i.e., the old utilization ratio is 50%), and the proportion of the new and old aggregates in the asphalt mixtures prepared in the comparative examples is 3.
Finally, detecting various indexes of the cold-recycling mixed material. The results are shown in Table 5.
Test results of the cold-recycled mixes prepared in Table 5
From the results, it can be seen that the cold-recycled mixes prepared in examples 1-4 and the comparative example are almost equivalent in performance. The embodiment 3 and the embodiment 4 obtain good marshall stability and dynamic stability, which shows that the cold-recycling mixture has excellent high-temperature stability, and the obtained better cold-recycling mixture can be used for a higher layer of a pavement structure layer, so that more possibilities can be provided for performance improvement, safety guarantee and cost saving.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The cold-recycling emulsified asphalt with high ratio recycled material utilization rate is characterized by comprising the following components in percentage by mass: 1-5% of light aromatic hydrocarbon naphtha, 3-10% of emulsifier, 3-10% of modifier, 20-30% of water and 60-70% of matrix asphalt.
2. The cold-recycled emulsified asphalt of claim 1, wherein said emulsifier comprises a cationic emulsifier.
3. The cold-recycling emulsified asphalt as set forth in claim 1, wherein the light aromatic naphtha has a structural formula as follows:
4. the cold-recycling emulsified asphalt as claimed in claim 1, wherein the modifier comprises SBR latex blended with macroporous cation resin, and the blending amount accounts for 10-20% of the total mass of the modifier.
5. The method for preparing the cold-recycling emulsified asphalt as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps: and (2) producing the modified emulsified asphalt by using the emulsifier, the modifier, water and the matrix asphalt, adding the light aromatic hydrocarbon naphtha after the modified emulsified asphalt is at normal temperature, and uniformly mixing to obtain the cold-recycling emulsified asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211200045.4A CN115403307A (en) | 2022-09-29 | 2022-09-29 | Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211200045.4A CN115403307A (en) | 2022-09-29 | 2022-09-29 | Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115403307A true CN115403307A (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211200045.4A Pending CN115403307A (en) | 2022-09-29 | 2022-09-29 | Cold-recycled emulsified asphalt with high utilization rate of recycled materials in proportion and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115403307A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632709A1 (en) * | 1986-09-26 | 1988-04-07 | Ruetgerswerke Ag | Process for the stabilisation of pitch/bitumen mixtures |
| CN105199407A (en) * | 2015-10-21 | 2015-12-30 | 王立志 | Low-temperature renewable asphalt binder and application thereof |
| CN113860799A (en) * | 2021-10-14 | 2021-12-31 | 东南大学 | Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof |
-
2022
- 2022-09-29 CN CN202211200045.4A patent/CN115403307A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632709A1 (en) * | 1986-09-26 | 1988-04-07 | Ruetgerswerke Ag | Process for the stabilisation of pitch/bitumen mixtures |
| CN105199407A (en) * | 2015-10-21 | 2015-12-30 | 王立志 | Low-temperature renewable asphalt binder and application thereof |
| CN113860799A (en) * | 2021-10-14 | 2021-12-31 | 东南大学 | Curing cold-patch material suitable for low-temperature humid environment and preparation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221129 |