CN113773000A - Modified recycled asphalt mixture and processing technology thereof - Google Patents
Modified recycled asphalt mixture and processing technology thereof Download PDFInfo
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- CN113773000A CN113773000A CN202111119181.6A CN202111119181A CN113773000A CN 113773000 A CN113773000 A CN 113773000A CN 202111119181 A CN202111119181 A CN 202111119181A CN 113773000 A CN113773000 A CN 113773000A
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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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Abstract
The application relates to a modified recycled asphalt mixture and a processing technology thereof, wherein the modified recycled asphalt mixture comprises the following components in parts by weight: 50-60 parts of recycled old asphalt material; 10-12 parts of a new asphalt material; 8-10 parts of coarse aggregate; 2-4 parts of a filler; 2-3 parts of a regenerant; 9-12 parts of hydroxymethyl polystyrene resin; 1-3 parts of diallylaminomethoxyacetanilide; 2-3 parts of guar gum; a processing technology of a modified recycled asphalt mixture comprises the preparation of a regenerant and the preparation of a recycled asphalt mixture. The application has the following advantages and effects: the diallyl amino methoxy acetanilide is highly crosslinked with hydroxymethyl polystyrene resin at high temperature in the asphalt mixture, has excellent comprehensive performance, is further blended with old asphalt materials and new asphalt materials to generate stronger binding force in the presence of guar gum, so that the obtained regenerated asphalt mixture is tightly combined, and the impact resistance and toughness are improved by further adding the coarse aggregate and the filler, and the rutting resistance of the asphalt mixture is further improved.
Description
Technical Field
The application relates to the technical field of asphalt mixtures, in particular to a modified recycled asphalt mixture and a processing technology thereof.
Background
After the rapid development of highways in China for more than ten years, a large amount of asphalt pavements enter the major and middle repair periods, and compared with the traditional asphalt pavement maintenance mode, the asphalt pavement regeneration can save a large amount of raw materials such as asphalt, gravel and the like, save the engineering investment, and simultaneously is beneficial to treating waste materials and protecting the environment, so that the method has obvious economic benefits and social and environmental benefits; with the concern of people on environmental protection and social benefits and the progress of technology, the recycling technology of asphalt pavements is more and more paid attention by people.
The prior Chinese patent with the publication number of CN112227143A discloses a pavement thermal regeneration construction method for an asphalt mixture; which comprises the following steps: cleaning the pavement, and heating the pavement to soften the old asphalt mixture layer on the pavement; raking the softened old asphalt mixture layer, and spraying a regenerant and hot asphalt; collecting the old asphalt mixture into a belt shape for stacking to obtain a regenerated old asphalt mixture; the regenerated old asphalt mixture is heated again, and the temperature of the regenerated old asphalt mixture is increased; adding a new asphalt mixture into the regenerated old asphalt mixture, and heating and uniformly stirring to obtain a regenerated asphalt mixture; and conveying the regenerated asphalt mixture to a paver for paving construction.
In view of the above-mentioned related technologies, the inventors consider that the current asphalt pavement is susceptible to rutting damage, and the service life of the pavement is affected when the rutting damage is serious, so that the rutting damage resistance of the recycled asphalt reclaimed mix of today is still to be improved to prolong the service life when the recycled asphalt reclaimed mix is reused.
Disclosure of Invention
In order to improve the anti-rutting performance of the recycled asphalt mixture and prolong the service life of the pavement paved with the recycled asphalt mixture, the application provides the modified recycled asphalt mixture and the processing technology thereof.
In a first aspect, the modified recycled asphalt mixture provided by the application adopts the following technical scheme:
the modified recycled asphalt mixture comprises the following components in parts by weight:
50-60 parts of recycled old asphalt material;
10-12 parts of a new asphalt material;
8-10 parts of coarse aggregate;
2-4 parts of a filler;
2-3 parts of a regenerant;
9-12 parts of hydroxymethyl polystyrene resin;
1-3 parts of diallylaminomethoxyacetanilide;
2-3 parts of guar gum.
By adopting the technical scheme, the methoxyl in the diallyl amino methoxyl acetanilide and the hydroxyl in the hydroxymethyl polystyrene resin are highly crosslinked at high temperature, the comprehensive performance is excellent, the diallyl amino methoxyl acetanilide is further blended with old asphalt materials and new asphalt materials, and stronger binding force is generated in the presence of guar gum, so that the obtained regenerated asphalt mixture is tightly combined, and the impact resistance and the toughness are improved by further adding the coarse aggregate and the filler, so that the anti-rutting performance of the asphalt mixture is further improved.
Preferably, the reclaimed asphalt mixture further comprises 6-8 parts by weight of isopropyl palmitate and 1-2 parts by weight of barium metaborate.
By adopting the technical scheme, isopropyl palmitate has higher lubricating permeability, the dispersibility of barium metaborate can be improved, isopropyl palmitate and guar gum can be thickened and tackified cooperatively, the internal structure is stabilized, and the heat resistance of the asphalt mixture can be improved better by synchronously adding barium metaborate, so that the condition that the asphalt mixture is melted and flows when paved on a road surface at outdoor high temperature is reduced, and then the generation of ruts is reduced.
Preferably, the reclaimed asphalt mixture further comprises 2-3 parts of butyl Pimenta latex by weight.
By adopting the technical scheme, the butyl Pix latex is mixed with the isopropyl palmitate and then is blended with the asphalt mixture to generate fusion, a pyridine group is introduced, the polarity is increased, and the butyl Pix latex is distributed in the asphalt mixture and then solidified into microscopic and uniformly distributed particles through the rise and fall of the temperature, so that the bonding strength among the components of the asphalt mixture is greatly improved, the toughness of the regenerated asphalt mixture is enhanced, and the rutting resistance and the overall quality of the regenerated asphalt mixture are improved.
Preferably, the weight part ratio of the hydroxymethyl polystyrene resin to the diallylaminomethoxyacetanilide is 5: 1.
By adopting the technical scheme, experiments prove that when the weight part ratio of the hydroxymethyl polystyrene resin to the diallylaminomethoxyacetanilide is 5:1, the effect of improving the anti-rutting property of the regenerated asphalt mixture is better, probably because the diallyl aminomethoxyacetanilide has excessive use amount and less hydroxyl content in a system, and the diallylaminomethoxyacetanilide is self-crosslinked, so that the impact resistance is poor and the anti-rutting property is reduced; the diallyl amino methoxy acetanilide has the advantages of low dosage, incomplete crosslinking reaction, poor system hardness and reduced rutting resistance.
Preferably, the regenerant comprises the following raw materials in parts by weight:
15-20 parts of rosin resin;
5-6 parts of furfural oil;
3-4 parts of triphenyl phosphite;
1-2 parts of POE-g-MAH;
2-3 parts of allyl butyl ether.
By adopting the technical scheme, the compatibility of the rosin resin and the furfural oil with the asphalt mixture is good, the stability of each component of the asphalt mixture is improved, the regeneration effect of the regenerant is improved through the reaction of triphenyl phosphite and POE-g-MAH, the viscosity of the regenerated asphalt mixture is reduced, the penetration and the ductility are increased, the high temperature resistance is improved, the problems that the viscosity of old asphalt materials is increased due to aging and the pavement is easy to crack are solved, and the anti-rutting property of the regenerated asphalt mixture is improved in a targeted manner.
Preferably, the POE-g-MAH and the allyl butyl ether have a weight part ratio of 2: 3.
By adopting the technical scheme, tests prove that when the weight part ratio of the tackifying compound to the dispersing agent is 2:3, the dispersing ability and the bonding property of the regenerant are ideal, so that the regenerant can be fully and uniformly mixed with the asphalt mixture on one hand, and the regenerant and the asphalt mixture can be stably combined on the other hand, thereby achieving the purposes of improving the regeneration property of the asphalt mixture and pertinently improving the rutting resistance.
In a second aspect, the application provides a processing technology of a modified recycled asphalt mixture, which adopts the following technical scheme:
a processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 30-40min at the temperature of 80-90 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at the temperature of 80-90 ℃ for 25-30min, and stirring for 10-15min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum for 40-50min at the temperature of 70-80 ℃ to obtain a modified mixture;
and (3) mixing and stirring the recovered old asphalt material and the regenerant prepared from S1 at the rotation speed of 300r/min under the condition of 150 ℃ plus 120 ℃ for 60-80min, then adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 3-4h at the stirring speed of 1000r/min plus 800 ℃ to obtain a regenerated asphalt mixture.
Preferably, the S2 further includes the following steps: blending 6-8 parts of isopropyl palmitate, 2-3 parts of butyl-pyridine latex and 1-2 parts of barium metaborate at 80-90 ℃, and stirring for 35-45min to obtain a blend;
stirring 9-12 parts of hydroxymethyl polystyrene resin, 1-3 parts of diallylaminomethoxyacetanilide and 2-3 parts of guar gum at the temperature of 70-80 ℃ for reacting for 40-50 min; and adding the blend, and continuously stirring for 20-30min to obtain a modified mixture.
To sum up, the application comprises the following beneficial technical effects:
1. the methoxy group in the diallyl amino methoxy acetanilide and the hydroxyl group in the hydroxymethyl polystyrene resin are highly crosslinked at high temperature, the comprehensive performance is excellent, the diallyl amino methoxy acetanilide is further blended with an old asphalt material and a new asphalt material to generate stronger binding force in the presence of guar gum, so that the obtained regenerated asphalt mixture is tightly bound, and the impact resistance and the toughness are improved by further adding the coarse aggregate and the filler, so that the anti-rutting performance of the asphalt mixture is further improved;
2. the butyl-picolatex and the isopropyl palmitate generate synergistic effect, so that the butyl-picolatex is distributed in the asphalt mixture and then solidified into microscopic and uniformly distributed particles, and the bonding strength among the components of the asphalt mixture is improved; the isopropyl palmitate has higher lubrication permeability, and can also improve the dispersibility of the barium metaborate, and the isopropyl palmitate and the guar gum can be synergistically thickened and tackified, so that the heat resistance of the asphalt mixture can be better improved by synchronously adding the barium metaborate while the internal structure is stabilized, the condition that the asphalt mixture is melted and flows when being paved on a road surface at outdoor high temperature is reduced, and then the generation of ruts is reduced;
3. the compatibility and component stability of the rosin resin and furfural oil in the regenerant with the asphalt mixture are improved, the regeneration effect of the regenerant can be improved by the reaction of triphenyl phosphite and POE-g-MAH, the viscosity of the regenerated asphalt mixture is reduced, the penetration and ductility are increased, the high temperature resistance is improved, the problems that the viscosity of old asphalt materials is increased due to aging and the pavement is easy to crack are solved, and the anti-rutting property of the regenerated asphalt mixture is improved in a targeted manner.
Detailed Description
The present application is described in further detail below.
In the application, the recovered old asphalt material is obtained by repairing, crushing and screening the pavement; the new asphalt material is produced by Zhejiang Gaodeng road asphalt Co Ltd; the coarse aggregate is crushed stone with the particle size of more than 2.36 mm; the filler is S95 mineral powder; the hydroxymethyl polystyrene resin is produced by gold mallow chemical co; rosin resin is produced by xiamen heko chemical limited; the furfural oil is 650SN furfural refined oil of Daqing refining company of China Petroleum; triphenyl phosphite, model 101-02-0, manufactured by Jiangsu plerian biotechnology limited; POE-g-MAH is produced by Shenyang four-dimensional group.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum; wherein, the regenerant comprises the following raw materials in parts by weight: 15 parts of rosin resin; 5 parts of furfural oil; 3 parts of triphenyl phosphite; 1 part of POE-g-MAH; 2 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 30min at the temperature of 80 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 80 ℃ for 25min, and stirring for 10min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallylaminomethoxyacetanilide and guar gum for 40min at the temperature of 70 ℃ to obtain a modified mixture;
and (3) mixing and stirring the recycled old asphalt material and the regenerant prepared from S1 at the rotation speed of 250r/min for 60min at the temperature of 120 ℃, adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 3h at the stirring speed of 800r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 2
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum; wherein, the regenerant comprises the following raw materials in parts by weight: 20 parts of rosin resin; 6 parts of furfural oil; 4 parts of triphenyl phosphite; 2 parts of POE-g-MAH; 3 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 40min at the temperature of 90 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 90 ℃ for 30min, and stirring for 15min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum for 50min at the temperature of 80 ℃ to obtain a modified mixture;
and (3) mixing the recycled old asphalt material with the regenerant prepared from S1 at the rotation speed of 300r/min at the temperature of 150 ℃ and stirring for 80min, then adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 4h at the stirring speed of 1000r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 3
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum; wherein, the regenerant comprises the following raw materials in parts by weight: 18 parts of rosin resin; 6 parts of furfural oil; 3 parts of triphenyl phosphite; 2 parts of POE-g-MAH; 3 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 35min at the temperature of 85 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 85 ℃ for 28min, and stirring for 12min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallylaminomethoxyacetanilide and guar gum for 45min at 75 ℃ to obtain a modified mixture;
and (3) mixing and stirring the recycled old asphalt material and the regenerant prepared from S1 for 70min at the rotation speed of 280r/min at the temperature of 130 ℃, adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 4h at the stirring speed of 900r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 4
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide, guar gum, isopropyl palmitate, barium metaborate and butyl picolatex; wherein, the regenerant comprises the following raw materials in parts by weight: 15 parts of rosin resin; 5 parts of furfural oil; 3 parts of triphenyl phosphite; 1 part of POE-g-MAH; 2 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 30min at the temperature of 80 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 80 ℃ for 25min, and stirring for 10min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallylaminomethoxyacetanilide and guar gum for 40min at the temperature of 70 ℃; blending isopropyl palmitate, butyl Pile latex and barium metaborate at 80 ℃, stirring for 35min to obtain a blend, adding the blend, and continuously stirring for 20min to obtain a modified mixture;
and (3) mixing and stirring the recycled old asphalt material and the regenerant prepared from S1 at the rotation speed of 250r/min for 60min at the temperature of 120 ℃, adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 3h at the stirring speed of 800r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 5
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide, guar gum, isopropyl palmitate, barium metaborate and butyl picolatex; wherein, the regenerant comprises the following raw materials in parts by weight: 20 parts of rosin resin; 6 parts of furfural oil; 4 parts of triphenyl phosphite; 2 parts of POE-g-MAH; 3 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 40min at the temperature of 90 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 90 ℃ for 30min, and stirring for 15min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallylaminomethoxyacetanilide and guar gum for 50min at the temperature of 80 ℃; blending isopropyl palmitate, butyl Pile latex and barium metaborate at 90 ℃, stirring for 45min to obtain a blend, adding the blend, and continuously stirring for 30min to obtain a modified mixture;
and (3) mixing the recycled old asphalt material with the regenerant prepared from S1 at the rotation speed of 300r/min at the temperature of 150 ℃ and stirring for 80min, then adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 4h at the stirring speed of 1000r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 6
The application discloses a modified recycled asphalt mixture and a processing technology thereof; a modified recycled asphalt mixture comprises the following components: recovering old asphalt material, new asphalt material, coarse aggregate, filler, regenerant, hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide, guar gum, isopropyl palmitate, barium metaborate and butyl picolatex; wherein, the regenerant comprises the following raw materials in parts by weight: 18 parts of rosin resin; 6 parts of furfural oil; 3 parts of triphenyl phosphite; 2 parts of POE-g-MAH; 3 parts of allyl butyl ether.
A processing technology of a modified recycled asphalt mixture comprises the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 35min at the temperature of 85 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at 85 ℃ for 28min, and stirring for 12min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallylaminomethoxyacetanilide and guar gum for 45min at the temperature of 75 ℃; blending isopropyl palmitate, butyl Pile latex and barium metaborate at 85 ℃, stirring for 40min to obtain a blend, adding the blend, and continuously stirring for 25min to obtain a modified mixture;
and (3) mixing and stirring the recycled old asphalt material and the regenerant prepared from S1 for 70min at the rotation speed of 280r/min at the temperature of 130 ℃, adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 4h at the stirring speed of 900r/min to obtain a regenerated asphalt mixture.
The contents of the components are shown in table 1 below.
Example 7
The difference from example 1 is that the components of a modified recycled asphalt mixture further include isopropyl palmitate and barium metaborate, and the content of each component is shown in table 2 below.
Example 8
The difference from example 7 is that isopropyl palmitate was replaced with epoxy resin and the contents of each component are shown in table 2 below.
Example 9
The difference from example 7 is that barium metaborate is replaced by calcium carbonate and the contents of the components are shown in Table 2 below.
Example 10
The difference from example 1 is that the weight part ratio of the hydroxymethyl polystyrene resin to the diallylaminomethoxyacetanilide is 5:1, and the contents of the components are shown in the following table 2.
Example 11
The difference from example 1 is that the weight part ratio of POE-g-MAH to allyl butyl ether in the raw material of the regenerant is 2:3, i.e. 2 parts of POE-g-MAH and 3 parts of allyl butyl ether, and the contents of the components are shown in Table 2 below.
Example 12
The difference from example 4 is that butadiene-styrene latex was replaced by butadiene-styrene latex, and the contents of the components are shown in table 2 below.
Example 13
The difference from example 1 is that the asphalt recycling agent LBS-3 manufactured by New Material science and technology Limited, State road Bisi is used as the recycling agent, item number LBS-RZ.
Comparative example
Comparative example 1
The difference from the example 1 is that the raw materials of the modified recycled asphalt mixture comprise old recycled asphalt, new asphalt, coarse aggregate, filler and a recycling agent; wherein the regenerant is asphalt regenerant LBS-3 produced by New Material science and technology Limited, often State Luobisi, and the product number LBS-RZ, and the contents of each component are shown in Table 3 below.
Comparative example 2
The difference from example 1 is that the hydroxymethyl polystyrene resin was replaced with a phenol resin, and the contents of the respective components are shown in table 3 below.
Comparative example 3
The difference from example 1 is that diallylaminomethoxyacetanilide was replaced by aniline and the contents of the components are shown in Table 3 below.
Comparative example 4
The difference from example 1 is that guar gum is replaced by hydroxyethyl cellulose and the component contents are shown in table 3 below.
Comparative example 5
The difference from example 1 is that the rosin resin was replaced with a polyvinyl chloride resin.
Comparative example 6
The difference from example 1 is that triphenyl phosphite is replaced with a polyphenyl ester.
Comparative example 7
The difference from example 1 is that POE-g-MAH was replaced by polymaleic anhydride.
TABLE 1 ingredient content tables for examples 1-6
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Recovering old asphalt material | 50 | 60 | 55 | 50 | 60 | 55 |
| New asphalt material | 10 | 12 | 11 | 10 | 12 | 11 |
| Coarse aggregate | 8 | 10 | 9 | 8 | 10 | 9 |
| Filler material | 2 | 4 | 3 | 2 | 4 | 3 |
| Regenerant | 2 | 3 | 3 | 2 | 3 | 3 |
| Hydroxymethyl polystyrene resin | 9 | 12 | 11 | 9 | 12 | 11 |
| Diallylaminomethoxyacetanilide | 1 | 3 | 2 | 1 | 3 | 2 |
| Guar gum | 2 | 3 | 2 | 2 | 3 | 2 |
| Isopropyl palmitate | / | / | / | 6 | 8 | 7 |
| Barium metaborate | / | / | / | 1 | 2 | 2 |
| Butyl pyridine latex | / | / | / | 2 | 3 | 3 |
TABLE 2 ingredient content tables for examples 7-13
| Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | |
| Recovering old asphalt material | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| New asphalt material | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Coarse aggregate | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Filler material | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Regenerant | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Hydroxymethyl polystyrene resin | 9 | 9 | 9 | 10 | 9 | 9 | 9 |
| Diallylaminomethoxyacetanilide | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
| Guar gum | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Isopropyl palmitate/epoxy resin | 6 | 6 | 6 | / | / | / | / |
| Barium metaborate/calcium carbonate | 1 | 1 | 1 | / | / | / | / |
| Butadiene-pyridine latex/styrene-butadiene latex | / | / | / | / | / | / | / |
TABLE 3 ingredient content of comparative examples 1 to 4
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Recovering old asphalt material | 50 | 50 | 50 | 50 |
| New asphalt material | 10 | 10 | 10 | 10 |
| Coarse aggregate | 8 | 8 | 8 | 8 |
| Filler material | 2 | 2 | 2 | 2 |
| Regenerant | 2 | 2 | 2 | 2 |
| Hydroxymethyl polystyrene resin/phenol resin | / | 9 | 9 | 9 |
| Diallylaminomethoxyacetanilide/aniline | / | 1 | 1 | 1 |
| Guar/hydroxyethyl cellulose | / | 2 | 2 | 2 |
Performance test
The test method comprises the following steps: the asphalt mixtures of the examples and the comparative examples are prepared into rutting test pieces of 300mm multiplied by 50mm, and indoor rutting tests are carried out; according to the test results of T0719-2011 in JTGE20-2011, the temperature is 60 ℃, the wheel pressure is 0.7MPa, the back-and-forth rolling speed of a test wheel is 42 times/min, the test is 60min, the test piece is placed at normal temperature for 12h after being wheel-rolled and formed, and the dynamic stability is tested, wherein the test results are shown in the following table 4; the higher the dynamic stability, the better the rut resistance.
TABLE 4 table of results of dynamic stability test of each example and comparative example
| Degree of dynamic stability (times/mm) | |
| Example 1 | 1252 |
| Example 2 | 1395 |
| Example 3 | 1324 |
| Example 4 | 1601 |
| Example 5 | 1743 |
| Example 6 | 1678 |
| Example 7 | 1543 |
| Example 8 | 1482 |
| Example 9 | 1496 |
| Example 10 | 1288 |
| Example 11 | 1271 |
| Example 12 | 1544 |
| Example 13 | 1125 |
| Comparative example 1 | 1023 |
| Comparative example 2 | 1179 |
| Comparative example 3 | 1208 |
| Comparative example 4 | 1189 |
| Comparative example 5 | 1210 |
| Comparative example 6 | 1192 |
| Comparative example 7 | 1206 |
In summary, the following conclusions can be drawn:
1. according to the example 1 and the examples 7 to 9 and the combination of the table 4, the synergistic addition of the isopropyl palmitate and the barium metaborate can better improve the rutting resistance of the reclaimed asphalt mixture.
2. According to the example 1 and the example 10 and the combination of the table 4, when the weight part ratio of the hydroxymethyl polystyrene resin to the diallylaminomethoxyacetanilide is 5:1, the rutting resistance of the reclaimed asphalt mixture can be effectively improved.
3. According to the embodiment 1 and the embodiments 11 to 13 and the combination of the table 4, when the weight part ratio of the POE-g-MAH to the allyl butyl ether is 2:3, the rutting resistance of the reclaimed asphalt mixture can be improved to a certain degree; in addition, the butyl Pix latex and the specific regenerant can be added to effectively improve the rutting resistance of the regenerated asphalt mixture.
4. According to the example 1 and the comparative example 1 and the combination of the table 4, the reclaimed asphalt mixture prepared by the technical scheme of the application has better anti-rutting performance.
5. According to example 1 and comparative examples 2 to 4 in combination with table 4, it can be seen that the co-addition of the hydroxymethylpolystyrene resin diallylaminomethoxyacetanilide and guar gum has a synergistic effect on the improvement of the rutting resistance of the reclaimed asphalt mix.
6. According to the example 1 and the comparative examples 5 to 7 and the combination of Table 4, the co-addition of the rosin resin, the triphenyl phosphite and the POE-g-MAH as the recycling agent can improve the rutting resistance of the recycled asphalt mixture.
The present embodiment is only for explaining the present application, and the protection scope of the present application is not limited thereby, and those skilled in the art can make modifications to the present embodiment without inventive contribution as needed after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A modified recycled asphalt mixture is characterized in that: the recycled asphalt mixture comprises the following components in parts by weight:
50-60 parts of recycled old asphalt material;
10-12 parts of a new asphalt material;
8-10 parts of coarse aggregate;
2-4 parts of a filler;
2-3 parts of a regenerant;
9-12 parts of hydroxymethyl polystyrene resin;
1-3 parts of diallylaminomethoxyacetanilide;
2-3 parts of guar gum.
2. The modified recycled asphalt mixture of claim 1, wherein: the regenerated asphalt mixture also comprises 6-8 parts of isopropyl palmitate and 1-2 parts of barium metaborate according to parts by weight.
3. The modified recycled asphalt mixture as claimed in claim 2, wherein: the regenerated asphalt mixture also comprises 2-3 parts of butyl-pyridine latex by weight.
4. The modified recycled asphalt mixture of claim 1, wherein: the weight part ratio of the hydroxymethyl polystyrene resin to the diallyl amino methoxy acetanilide is 5: 1.
5. The modified recycled asphalt mixture of claim 1, wherein: the regenerant comprises the following raw materials in parts by weight:
15-20 parts of rosin resin;
5-6 parts of furfural oil;
3-4 parts of triphenyl phosphite;
1-2 parts of POE-g-MAH;
2-3 parts of allyl butyl ether.
6. The modified recycled asphalt mixture of claim 5, wherein: the POE-g-MAH and the allyl butyl ether are in a weight part ratio of 2: 3.
7. The process for processing the modified recycled asphalt mixture as claimed in claim 1, which is characterized by comprising the following steps:
s1, preparing a regenerant; firstly, triphenyl phosphite, POE-g-MAH and allyl butyl ether are stirred and react for 30-40min at the temperature of 80-90 ℃; continuously adding a mixture obtained by stirring rosin resin and furfural oil at the temperature of 80-90 ℃ for 25-30min, and stirring for 10-15min to obtain a regenerant;
s2, preparing a regenerated asphalt mixture; stirring and reacting hydroxymethyl polystyrene resin, diallyl amino methoxy acetanilide and guar gum for 40-50min at the temperature of 70-80 ℃ to obtain a modified mixture;
and (3) mixing and stirring the recovered old asphalt material and the regenerant prepared from S1 at the rotation speed of 300r/min under the condition of 150 ℃ plus 120 ℃ for 60-80min, then adding the new asphalt material, the coarse aggregate, the filler and the modified mixture, and stirring for 3-4h at the stirring speed of 1000r/min plus 800 ℃ to obtain a regenerated asphalt mixture.
8. The processing technology of the modified recycled asphalt mixture according to claim 7, which is characterized in that: the S2 further includes the steps of: blending 6-8 parts of isopropyl palmitate, 2-3 parts of butyl-pyridine latex and 1-2 parts of barium metaborate at 80-90 ℃, and stirring for 35-45min to obtain a blend;
stirring 9-12 parts of hydroxymethyl polystyrene resin, 1-3 parts of diallylaminomethoxyacetanilide and 2-3 parts of guar gum at the temperature of 70-80 ℃ for reacting for 40-50 min; and adding the blend, and continuously stirring for 20-30min to obtain a modified mixture.
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