CN113354340A - Plant-mixed hot recycled asphalt mixture and preparation method thereof - Google Patents
Plant-mixed hot recycled asphalt mixture and preparation method thereof Download PDFInfo
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- CN113354340A CN113354340A CN202110796472.2A CN202110796472A CN113354340A CN 113354340 A CN113354340 A CN 113354340A CN 202110796472 A CN202110796472 A CN 202110796472A CN 113354340 A CN113354340 A CN 113354340A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 216
- 239000000203 mixture Substances 0.000 title claims abstract description 180
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 82
- 239000012492 regenerant Substances 0.000 claims abstract description 51
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 31
- 239000011707 mineral Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 238000004064 recycling Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 38
- 235000019198 oils Nutrition 0.000 claims description 38
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical group CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 28
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical group O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 26
- 238000004523 catalytic cracking Methods 0.000 claims description 25
- 239000002002 slurry Substances 0.000 claims description 25
- 235000005687 corn oil Nutrition 0.000 claims description 23
- 239000002285 corn oil Substances 0.000 claims description 23
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000011259 mixed solution Substances 0.000 claims description 22
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 22
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 20
- 241000196324 Embryophyta Species 0.000 claims description 13
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000004014 plasticizer Substances 0.000 claims description 6
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 6
- 239000008158 vegetable oil Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 229910052612 amphibole Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000003716 rejuvenation Effects 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 239000011384 asphalt concrete Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000715 Mucilage Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene group Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
- 238000012668 chain scission Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000010998 test method Methods 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
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 application relates to the technical field of asphalt pavements, in particular to a hot mix plant recycling asphalt mixture and a preparation method thereof. The recycled asphalt mixture comprises the following components in parts by weight: 40-50 parts of old sbs asphalt mixture; 3-5 parts of asphalt; 50-56 parts of aggregate; 3-5 parts of mineral powder; 0.1-0.12 part of penetrant; 0.6-0.8 part of regenerant. The preparation method comprises the following steps: s1: mixing 40-50 parts by weight of old sbs asphalt mixture, 0.6-0.8 part of regenerant and 0.1-0.12 part of penetrant, and then uniformly stirring to obtain a mixture C; s2: adding 50-56 parts of aggregate into the mixture C, and uniformly stirring to obtain a mixture D; s3: and heating 3-5 parts of asphalt to 160-170 ℃, adding the asphalt and 3-5 parts of mineral powder into the mixture D, and uniformly stirring to obtain the regenerated asphalt mixture. The method has the advantage of recycling the waste asphalt mixture.
Description
Technical Field
The application relates to the technical field of asphalt pavements, in particular to a hot mix plant recycling asphalt mixture and a preparation method thereof.
Background
Asphalt pavements are various types of pavements formed by spreading and rolling asphalt concrete. The asphalt concrete is a mixture formed by fully blending asphalt and mineral aggregates with certain gradation.
The structural disease can appear after using a period of time in bituminous paving, lead to the road surface service function to descend, consequently general bituminous paving operation can face the major-medium maintenance engineering after a period of time, the serious road surface of general structural disease often adopts in the major-medium maintenance engineering and mills the prescription mode of milling and additionally laying, and mill the former road surface of milling and can produce a large amount of old bituminous mixture, pile up after these materials are discarded mostly, occupy the land, the polluted environment, the event needs to carry out recycle to old bituminous mixture.
Disclosure of Invention
In order to recycle waste asphalt mixture, the application provides a hot mix plant recycling asphalt mixture and a preparation method thereof.
In a first aspect, the application provides a hot mix plant recycled asphalt mixture, which adopts the following technical scheme:
the plant-mixed hot recycled asphalt mixture comprises the following components in parts by weight:
40-50 parts of old sbs asphalt mixture;
3-5 parts of asphalt;
50-56 parts of aggregate;
3-5 parts of mineral powder;
0.1-0.12 part of penetrant;
0.6-0.8 part of regenerant.
By adopting the technical scheme, the regenerant regenerates the aged sbs asphalt components in the old sbs asphalt mixture, the performance of the aged sbs asphalt is improved, and a certain proportion of new asphalt, new aggregate and new mineral powder is added simultaneously, so that the regenerated asphalt mixture can meet the use requirement, and the recycling of the old sbs asphalt mixture is realized.
Preferably, the regenerant comprises the following components: the weight parts of the catalyst are 18-20 parts of catalytic cracking slurry oil, 18-20 parts of ethyl acrylate, 18-20 parts of vegetable oil, 3-5 parts of plasticizer and 4-6 parts of glycidyl ether.
By adopting the technical scheme, the catalytic cracking oil slurry and the corn oil can supplement lost aromatic components and saturated components in the asphalt, repair damaged polymer networks in the aged asphalt, simultaneously, the corn oil can dissolve the asphaltene in the asphalt and play a role in diluting the aged asphalt, so that the viscosity of the asphalt is reduced, the catalytic cracking oil slurry and the corn oil can better regenerate the asphalt, thereby enhancing the flexibility of the aged asphalt, the ethyl acrylate can better ensure the component balance of the regenerated asphalt, the durability and the bending resistance of the regenerated asphalt are obviously improved, the glycidyl ether can regenerate the SBS in the aged asphalt, so that the molecular chain structure of the SBS in the aged asphalt is recovered, meanwhile, the SBS polymer can generate swelling reaction when the asphalt absorbs light components in the asphalt, and the catalytic cracking oil slurry, the corn oil and the ethyl acrylate can provide a part of light components for the SBS polymer to absorb, the SBS is swelled more fully.
Preferably, the vegetable oil is corn oil and the plasticizer is dibutyl phthalate.
Preferably, the preparation method of the regenerant comprises the following steps:
a1: mixing 18-20 parts by weight of catalytic cracking slurry oil, 18-20 parts by weight of ethyl acrylate and 18-20 parts by weight of vegetable oil, and uniformly stirring to obtain a mixed solution A;
a2: and adding 3-5 parts of plasticizer and 4-6 parts of glycidyl ether into the mixed solution A, and uniformly stirring to obtain the regenerant.
Preferably, in the step A1, the stirring temperature is 140-150 ℃ and the stirring time is 0.5-1h, and in the step A2, the stirring temperature is 130-140 ℃ and the stirring time is 1.5-2 h.
Preferably, the penetrant is furfural oil.
Preferably, the aggregate is one of amphibole and basalt, and the aggregate is continuous graded particles with the particle size of less than 26.5 mm; the mineral powder is limestone mineral powder, and the mesh range of the mineral powder is 120-140 meshes.
By adopting the technical scheme, the mineral powder has a filling effect on the asphalt mixture, the gap of the asphalt mixture is reduced, the mineral powder and the asphalt form asphalt mucilage together, the strength and the stability of the asphalt mixture are improved, and the mesh range of the mineral powder is 120-140 meshes so that the mineral powder can be fully and uniformly mixed with the regenerated asphalt mixture; the aggregate plays a role of a framework in the asphalt mixture, and the compression resistance of the asphalt mixture is improved.
Preferably, the oilstone ratio of the old asphalt mixture is 3.8-4.2%.
In a second aspect, the application provides a preparation method of a hot mix plant recycled asphalt mixture, which adopts the following technical scheme: a preparation method of a plant-mixed hot recycled asphalt mixture comprises the following steps:
s1: mixing 40-50 parts by weight of old sbs asphalt mixture, 0.6-0.8 part of regenerant and 0.1-0.12 part of penetrant, and then uniformly stirring to obtain a mixture C;
s2: adding 50-56 parts of aggregate into the mixture C, and uniformly stirring to obtain a mixture D;
s3: and heating 3-5 parts of asphalt to 160-170 ℃, adding the asphalt and 3-5 parts of mineral powder into the mixture D, and uniformly stirring to obtain the regenerated asphalt mixture.
By adopting the technical scheme, the regenerant and the penetrant are mixed with the old sbs asphalt mixture, and then the mixture is stirred, so that the regenerant and the penetrant are dispersed into the old sbs asphalt mixture, the old sbs asphalt is regenerated, the performance of the old asphalt is improved, in the step S3, the newly added asphalt is heated in advance to be melted, the asphalt can be more fully mixed when the old sbs asphalt mixture is added, and then the aggregate and the mineral powder are added for stirring.
Preferably, in the step S1, the stirring temperature is 120-130 ℃, and the stirring time is 4-5 min; in the step S2, the aggregate is heated to 210 ℃ at the temperature of 190-; in the step S3, the stirring temperature is 150-165 ℃, and the stirring time is 30-45S.
By adopting the technical scheme, the asphalt can be effectively melted by the process parameters of 120-130 ℃ and 4-5min in the step S1, and the reaction activity between the regenerant and the old sbs asphalt mixture is increased, so that the regenerant can fully react with the old sbs asphalt to regenerate the old sbs asphalt; the stirring temperature of 150-165 ℃ in the step S3 can ensure that the regenerated asphalt mixture can keep a proper construction temperature after being taken out of the pot, and simultaneously, the temperature of the asphalt is not too high, so that the asphalt is aged in advance, and the stirring time of 30-45S avoids the aging of the asphalt caused by too long stirring time.
In summary, the present application has the following beneficial effects:
1. the regeneration agent is adopted to regenerate the aged sbs asphalt components in the old sbs asphalt mixture, so that the performance of the aged sbs asphalt is improved, and a certain proportion of new asphalt, new aggregate and new mineral powder is added simultaneously, so that the regenerated asphalt mixture can meet the use requirement, and the recycling of the old sbs asphalt mixture is realized.
2. The regenerant is prepared based on catalytic cracking oil slurry, corn oil and ethyl acrylate, the catalytic cracking oil slurry and the corn oil can supplement lost aromatic components and saturated components in asphalt, repair damaged polymer networks in aged asphalt, simultaneously, the corn oil can dissolve asphaltine in the asphalt, the effect of diluting the aged asphalt is achieved, the viscosity of the asphalt is reduced, the catalytic cracking oil slurry and the corn oil can better regenerate the asphalt, the flexibility of the aged asphalt is enhanced, the ethyl acrylate can better ensure the component balance of the regenerated asphalt, the durability and the bending resistance of the regenerated asphalt are obviously improved, the glycidyl ether can regenerate SBS in the aged asphalt, the molecular chain structure of the SBS in the aged asphalt is recovered, and meanwhile, the SBS polymer can generate swelling reaction in the asphalt by absorbing light components in the asphalt, the catalytic cracking slurry oil, the corn oil and the ethyl acrylate can provide a part of light components for the SBS polymer to absorb, so that the SBS is more fully swelled.
3. The preparation method comprises the steps of mixing the regenerant and the penetrating agent with the old sbs asphalt mixture, stirring, dispersing the regenerant and the penetrating agent into the old sbs asphalt mixture, regenerating the old sbs asphalt, and improving the performance of the old asphalt, wherein in the step S3, the newly added asphalt is heated in advance to be melted, so that the asphalt can be more fully mixed when being added into the old sbs asphalt mixture, and then the aggregate and the mineral powder are added for stirring.
Detailed Description
The present application will be described in further detail with reference to examples.
SBS modified asphalt is widely used in paving asphalt pavements in China since the beginning of the 21 st century because of excellent mechanical properties, especially for expressways. Therefore, the research on the regeneration technology of the waste SBS asphalt mixture has important significance for promoting the sustainable development of the Chinese roads. Compared with other regeneration modes, the plant-mixed hot-recycling asphalt mixture has relatively reliable quality and the widest application. After the pavement is accurately and efficiently detected to determine the type of the surface layer diseases, the most common maintenance measures are milling and planing the asphalt pavement and paving the surface layer again. If the original asphalt mixture can be regenerated, the performance of the aged mixture is recovered and the aged mixture is paved on the road surface again, the resource-saving maintenance technology not only saves resources, but also creates objective economic benefit and environmental protection effect. The resource-saving maintenance technology for recycling the mixture is mature in application to common asphalt pavements, but is still immature in common SBS asphalt pavements in China, and has two main difficulties, namely lack of a regenerant capable of effectively recovering the performance of aged SBS asphalt on one hand and lack of process research for hot mix plant-mixing regeneration of SBS asphalt mixture on the other hand.
The raw material sources of the following examples and preparations are shown in table 1:
TABLE 1
TABLE 2 design grading of aggregates
Examples
Example 1
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 30 parts by weight of ethyl acrylate and 30 parts by weight of corn oil, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 5 parts of dibutyl phthalate and 5 parts of glycidyl ether into the mixed solution A, and stirring at 140 ℃ for 2 hours to obtain the regenerant.
Example 2
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 29 parts by weight of catalytic cracking slurry oil with 30 parts by weight of corn oil, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 5 parts of dibutyl phthalate and 5 parts of glycidyl ether into the mixed solution A, and stirring at 140 ℃ for 2 hours to obtain the regenerant.
Example 3
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 29 parts by weight of catalytic cracking slurry oil with 30 parts by weight of ethyl acrylate, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 5 parts of dibutyl phthalate and 5 parts of glycidyl ether into the mixed solution A, and stirring at 140 ℃ for 2 hours to obtain the regenerant.
Example 4
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 29 parts by weight of catalytic cracking slurry oil with 30 parts by weight of ethyl acrylate, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 10 parts of glycidyl ether into the mixed solution A, and stirring for 2 hours at 140 ℃ to obtain the regenerant.
Example 5
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 29 parts by weight of catalytic cracking slurry oil with 30 parts by weight of ethyl acrylate, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 10 parts of dibutyl phthalate into the mixed solution A, and stirring for 2 hours at 140 ℃ to obtain the regenerant.
Example 6
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 40 parts by weight of old sbs asphalt mixture with the oilstone ratio of 3.8 percent, 0.6 part of regenerant and 0.1 part of furfural oil, and stirring at 120 ℃ for 4min to obtain a mixture C;
s2: preheating 50 parts of amphibole aggregate to 190 ℃, adding the mixture C, and stirring at 155 ℃ for 5s to obtain a mixture D;
s3: and (3) heating 3 parts of asphalt to 160 ℃, adding the asphalt and 3 parts of limestone mineral powder with the average mesh number of 120 meshes into the mixture D, and stirring for 30s at 150 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 18 parts by weight of catalytic cracking slurry oil, 18 parts by weight of ethyl acrylate and 18 parts by weight of corn oil, and stirring at 140 ℃ for 0.5h to obtain a mixed solution A;
a2: and adding 3 parts of dibutyl phthalate and 4 parts of glycidyl ether into the mixed solution A, and stirring at 130 ℃ for 1.5 hours to obtain the regenerant.
Example 7
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% with 0.8 part of regenerant and 0.12 part of furfural oil, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 20 parts by weight of catalytic cracking slurry oil, 19 parts by weight of ethyl acrylate and 19 parts by weight of corn oil, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 5 parts of dibutyl phthalate and 5 parts of glycidyl ether into the mixed solution A, and stirring at 140 ℃ for 2 hours to obtain the regenerant.
Example 8
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 45 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.0%, 0.7 part of regenerant and 0.11 part of furfural oil, and stirring at 125 ℃ for 4.5min to obtain a mixture C;
s2: preheating 56 parts of basalt aggregate to 210 ℃, adding the mixture C, and stirring at 170 ℃ for 8s to obtain a mixture D;
s3: and (3) heating 5 parts of asphalt to 170 ℃, adding the asphalt and 4 parts of limestone mineral powder with the average mesh number of 130 meshes into the mixture D, and stirring for 45s at 158 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 19 parts by weight of catalytic cracking slurry oil, 20 parts by weight of ethyl acrylate and 20 parts by weight of corn oil, and stirring at 150 ℃ for 1 hour to obtain a mixed solution A;
a2: adding 4 parts of dibutyl phthalate and 6 parts of glycidyl ether into the mixed solution A, and stirring at 135 ℃ for 1.8 hours to obtain a regenerant;
comparative example
Comparative example 1
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture 0.12 part by weight of furfural oil with an oilstone ratio of 4.2%, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Comparative example 2
A plant-mixed hot recycling asphalt mixture is prepared by the following steps:
s1: mixing 50 parts by weight of old sbs asphalt mixture with an oilstone ratio of 4.2% and 0.8 part by weight of regenerant, and stirring at 130 ℃ for 5min to obtain a mixture C;
s2: preheating 53 parts of basalt aggregate to 200 ℃, adding the mixture C, and stirring at 163 ℃ for 10s to obtain a mixture D;
s3: and heating 4 parts of asphalt to 165 ℃, adding the asphalt and 5 parts of limestone mineral powder with the average mesh number of 140 meshes into the mixture D, and stirring for 38 seconds at 165 ℃ to obtain the regenerated asphalt mixture.
Wherein, the preparation steps of the regenerant are as follows:
a1: mixing 20 parts by weight of catalytic cracking slurry oil, 19 parts by weight of ethyl acrylate and 19 parts by weight of corn oil, and stirring at 145 ℃ for 0.8h to obtain a mixed solution A;
a2: and adding 5 parts of dibutyl phthalate and 5 parts of glycidyl ether into the mixed solution A, and stirring at 140 ℃ for 2 hours to obtain the regenerant.
Performance test
Detection method/test method
1. Rut test
Rutting tests were performed on the reclaimed asphalt according to the road engineering asphalt and asphalt mixture test protocol (JTGE20-2011), and the test results are shown in table 2.
2. Trabecular bending test
The recycled asphalt mixture was subjected to a trabecular bending test according to the test protocol for road engineering asphalt and asphalt mixture (JTGE20-2011), and the test results are shown in table 3.
TABLE 3
It can be seen from the combination of examples 1-3 and examples 4-6 and from Table 3 that, when the catalytic cracking oil slurry corn oil and ethyl acrylate are added to the rejuvenating agent, the dynamic stability and failure strain of the rejuvenated asphalt mixture are improved, which is probably because the light components in the asphalt are continuously lost and the asphaltenes are increased during the aging process of the asphalt, thereby increasing the brittleness of the asphalt and causing the surface of the asphalt to be dry and brittle and further causing cracks and loosening, while when the composite rejuvenating agent based on the catalytic cracking oil slurry, ethyl acrylate and corn oil is added to the aged asphalt, the dynamic stability and failure strain of the rejuvenated asphalt are improved, which is probably because the catalytic cracking oil slurry and corn oil can supplement the lost aromatic components and saturated components in the asphalt, repair the damaged polymer network in the aged asphalt and dissolve the asphaltenes in the asphalt, the asphalt has the effects of diluting aged asphalt, so that the viscosity of the asphalt is reduced, the catalytic cracking slurry oil and the corn oil can better regenerate the asphalt, the flexibility of the aged asphalt is enhanced, the ethyl acrylate can better ensure the component balance of the regenerated asphalt, the dynamic stability and the damage strain of the regenerated asphalt are obviously improved, meanwhile, the SBS polymer can generate a swelling reaction in the process that the asphalt absorbs light components in the asphalt, and the catalytic cracking slurry oil, the corn oil and the ethyl acrylate can provide a part of the light components for the SBS polymer to absorb, so that the SBS is swelled more fully.
It can be seen from the combination of example 5 and example 7 and table 3 that, when the glycidyl ether is added to the rejuvenating agent, the dynamic stability and the failure strain of the rejuvenated asphalt mixture are both improved, because the butadiene part of the SBS polymer is susceptible to chain scission reaction caused by light and heat during the aging process of the SBS asphalt, which results in the failure of the internal polymer network, and the modification effect on the asphalt is lost, and the glycidyl ether can be better and fully mixed with the aged asphalt due to the effect of reducing the viscosity of the aged asphalt, possibly due to the catalytic cracking slurry oil, the ethyl acrylate and the corn oil, so as to repair the structure of the aged SBS, recover the molecular chain structure of the SBS molecules in the aged asphalt, and improve the dynamic stability and the failure strain of the rejuvenated asphalt.
It can be seen from the combination of example 4 and example 7 and table 2 that, when dibutyl phthalate is added to the regenerant, the dynamic stability and the breaking strain of the regenerated asphalt are improved compared with those of the regenerated asphalt without dibutyl phthalate, which is probably because dibutyl phthalate can enhance the regeneration effect of glycidyl ether on aged sbs, and dibutyl phthalate can increase the mobility of molecular bonds of the sbs, reduce the crystallinity of the sbs molecules, and improve the activity of the sbs molecules, so that the regeneration ratio of the sbs can be increased when the molecular chain structure of the sbs is recovered by the glycidyl ether.
By combining the example 7 and the comparative example 1 and combining the table 3, it can be seen that after the regenerant is added to the regenerated asphalt mixture, the dynamic stability and the failure strain of the regenerated asphalt mixture are both greatly improved, which indicates that the regenerant can effectively regenerate the aged sbs asphalt, so that the dynamic stability and the failure strain of the regenerated asphalt mixture are improved, and the recycling of the old sbs asphalt mixture is realized.
It can be seen by combining example 2 and comparative example 2 with table 3 that both the dynamic stability and the strain to failure of the reclaimed asphalt mixture are improved when furfural oil is added to the reclaimed asphalt mixture, probably because the furfural oil facilitates the incorporation of glycidyl ether molecules between the aged sbs, thereby facilitating the glycidyl ether repair of the aged sbs.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The plant-mixed hot recycled asphalt mixture is characterized by comprising the following components in parts by weight:
40-50 parts of old sbs asphalt mixture;
3-5 parts of asphalt;
50-56 parts of aggregate;
3-5 parts of mineral powder;
0.1-0.12 part of penetrant;
0.6-0.8 part of regenerant.
2. The hot mix plant mix recycled asphalt mixture of claim 1, wherein: the regenerant comprises the following components: the weight parts of the catalyst are 18-20 parts of catalytic cracking slurry oil, 18-20 parts of ethyl acrylate, 18-20 parts of vegetable oil, 3-5 parts of plasticizer and 4-6 parts of glycidyl ether.
3. The hot mix plant mix recycled asphalt mixture of claim 1, wherein: the vegetable oil is corn oil, and the plasticizer is dibutyl phthalate.
4. A hot mix plant mix recycled asphalt mix according to any one of claims 1 to 3, characterized in that: the preparation method of the regenerant comprises the following steps:
a1: mixing 18-20 parts by weight of catalytic cracking slurry oil, 18-20 parts by weight of ethyl acrylate and 18-20 parts by weight of vegetable oil, and uniformly stirring to obtain a mixed solution A;
a2: and adding 3-5 parts of plasticizer and 4-6 parts of glycidyl ether into the mixed solution A, and uniformly stirring to obtain the regenerant.
5. The hot mix plant mix recycled asphalt mixture of claim 4, wherein: in the step A1, the stirring temperature is 140-150 ℃, and the stirring time is 0.5-1h, in the step A2, the stirring temperature is 130-140 ℃, and the stirring time is 1.5-2 h.
6. The hot mix plant mix recycled asphalt mixture of claim 1, wherein: the penetrating agent is furfural oil.
7. The hot mix plant mix recycled asphalt mixture of claim 1, wherein: the aggregate is one of amphibole and basalt, and is continuous graded particles with the particle size of less than 26.5 mm; the mineral powder is limestone mineral powder, and the mesh range of the mineral powder is 120-140 meshes.
8. The hot mix plant mix recycled asphalt mixture of claim 1, wherein: the asphalt-stone ratio of the old sbs asphalt mixture is 3.8-4.2%.
9. The method for preparing a hot mix plant mix reclaimed asphalt according to any one of claims 1 to 8, wherein the method comprises the following steps: the recycled asphalt mixture is prepared by the following steps:
s1: mixing 40-50 parts by weight of old sbs asphalt mixture, 0.6-0.8 part of regenerant and 0.1-0.12 part of penetrant, and then uniformly stirring to obtain a mixture C;
s2: adding 50-56 parts of aggregate into the mixture C, and uniformly stirring to obtain a mixture D;
s3: and heating 3-5 parts of asphalt to 160-170 ℃, adding the asphalt and 3-5 parts of mineral powder into the mixture D, and uniformly stirring to obtain the regenerated asphalt mixture.
10. The method for preparing the hot mix plant recycling asphalt mixture according to claim 9, wherein the method comprises the following steps: in the step S1, the stirring temperature is 120-; in the step S2, the aggregate is heated to 210 ℃ at the temperature of 190-; in the step S3, the stirring temperature is 150-165 ℃, and the stirring time is 30-45S.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629020A (en) * | 2009-08-10 | 2010-01-20 | 江苏省建筑科学研究院有限公司 | Special regenerant suitable for regenerating modified asphalt and prepared method thereof |
| CN102618046A (en) * | 2012-03-31 | 2012-08-01 | 英达热再生有限公司 | SBS (styrene-butadiene-styrene) modified regenerant, preparation method thereof and asphalt regeneration method |
| CN104231640A (en) * | 2013-08-27 | 2014-12-24 | 武汉理工大学 | SBS (styrene-butadiene-styrene) modified asphalt regenerant and preparation method thereof |
| CN104610768A (en) * | 2015-01-26 | 2015-05-13 | 江苏苏博特新材料股份有限公司 | Asphalt regeneration agent as well as preparation method and application thereof |
| CN109354890A (en) * | 2018-11-02 | 2019-02-19 | 长沙理工大学 | A kind of regenerating waste asphalt method |
| US20200308052A1 (en) * | 2016-05-23 | 2020-10-01 | Jiangsu Tiannuo Road Materials Technology Co.,Ltd | Plant mix warm regenerated asphalt mixture and preparation method therefor |
| CN111747683A (en) * | 2020-06-29 | 2020-10-09 | 上海佳砼新材料科技发展有限公司 | Hot-mix-in-plant asphalt mixture and preparation method thereof |
-
2021
- 2021-07-14 CN CN202110796472.2A patent/CN113354340A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629020A (en) * | 2009-08-10 | 2010-01-20 | 江苏省建筑科学研究院有限公司 | Special regenerant suitable for regenerating modified asphalt and prepared method thereof |
| CN102618046A (en) * | 2012-03-31 | 2012-08-01 | 英达热再生有限公司 | SBS (styrene-butadiene-styrene) modified regenerant, preparation method thereof and asphalt regeneration method |
| CN104231640A (en) * | 2013-08-27 | 2014-12-24 | 武汉理工大学 | SBS (styrene-butadiene-styrene) modified asphalt regenerant and preparation method thereof |
| CN104610768A (en) * | 2015-01-26 | 2015-05-13 | 江苏苏博特新材料股份有限公司 | Asphalt regeneration agent as well as preparation method and application thereof |
| US20200308052A1 (en) * | 2016-05-23 | 2020-10-01 | Jiangsu Tiannuo Road Materials Technology Co.,Ltd | Plant mix warm regenerated asphalt mixture and preparation method therefor |
| CN109354890A (en) * | 2018-11-02 | 2019-02-19 | 长沙理工大学 | A kind of regenerating waste asphalt method |
| CN111747683A (en) * | 2020-06-29 | 2020-10-09 | 上海佳砼新材料科技发展有限公司 | Hot-mix-in-plant asphalt mixture and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 梁乃兴等编著: "《现代路面与材料》", 31 August 2003, 人民交通出版社 * |
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Application publication date: 20210907 |