CN113831745A - Warm-mixed asphalt and preparation method thereof - Google Patents
Warm-mixed asphalt and preparation method thereof Download PDFInfo
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- CN113831745A CN113831745A CN202010511911.6A CN202010511911A CN113831745A CN 113831745 A CN113831745 A CN 113831745A CN 202010511911 A CN202010511911 A CN 202010511911A CN 113831745 A CN113831745 A CN 113831745A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/20—Mixtures of bitumen and aggregate defined by their production temperatures, e.g. production of asphalt for road or pavement applications
- C08L2555/24—Asphalt produced between 100°C and 140°C, e.g. warm mix asphalt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention discloses warm mix asphalt and a preparation method thereof, and the adopted raw materials comprise matrix asphalt, polymer and additive; the asphalt-polymer composite material comprises, by weight, 85-90% of asphalt, 6-8% of polymer and 2-5% of additive; the polymer is styrene-butadiene rubber and styrene-butadiene-styrene triblock copolymer, and the additive is a composition of molecular weight regulator and stabilizer. A preparation method of warm-mixed asphalt comprises four steps. According to the invention, the polymer and the additive material are added into the asphalt main material, so that the prepared finished product has a remarkable viscosity reduction effect, and the mixing, paving and rolling temperatures of the matrix asphalt mixture are reduced, compared with the common matrix asphalt mixture, the construction operation temperature can be reduced by at least about 40 ℃, the health of constructors is ensured, the environment benefits of energy conservation and emission reduction are achieved, the construction cost is reduced, and the construction progress and the construction quality are improved. Based on the above, the invention has good application prospect.
Description
Technical Field
The invention relates to the technical field of asphalt preparation, in particular to warm mix asphalt and a preparation method thereof.
Background
The traditional hot-mixed asphalt mixture is the most widely applied asphalt mixture in the construction of roads and the like at present because the mixing and paving operations are simple and easy. The production process of HMA (hot-mix asphalt) is to mix asphalt (or modified asphalt) and aggregate at about 180 ℃ with equipment; in construction, the temperature for paving and rolling road construction equipment is usually not lower than 140 ℃. Because the temperature is higher, a large amount of fuel oil is consumed in the process, and asphalt smoke gas containing a large amount of 3, 4-benzopyrene and other gases is released in the mixing, transportation and construction processes, so that the health of construction personnel and the atmospheric environment are seriously damaged. In addition, the use of HMA is also limited by the ambient temperature, and too low a temperature cannot satisfy the remixing of the mixture, and particularly cannot satisfy the high temperature requirements during paving and rolling, so that paving and rolling of roads cannot be performed. Due to the influence of the factors, energy waste is caused by high required temperature, the construction period of the road is greatly prolonged, and the early passing of the road is hindered. Based on the above, it is necessary to provide a warm mix asphalt and a processing method thereof, which can reduce the viscosity of the asphalt and the mixing temperature.
Disclosure of Invention
In order to overcome the defects that the required temperature of the existing warm mix asphalt is higher in the mixing and road paving and rolling processes, which can cause serious harm to the health of constructors and the atmospheric environment, thereby causing energy waste, prolonging the road construction period and causing obstruction to the early passing of roads, the invention provides the warm mix asphalt and the preparation method thereof, which are characterized in that the polymers and the additive materials are added into the asphalt main material, the viscosity reduction effect of the prepared finished product is obvious, the mixing, paving and rolling temperatures of the matrix asphalt mixture are reduced, compared with the common matrix asphalt mixture, all the construction operation temperatures can be reduced by at least 40 ℃, the health of the constructors is ensured, the energy-saving and emission-reducing environmental benefits are realized, the construction cost is reduced, and the construction progress and the construction quality are improved.
The invention provides a preparation method of warm mix asphalt, which comprises the following steps:
step A: heating the asphalt to 100-120 ℃ by using heating equipment;
and B: after the asphalt is melted, adding a polymer and an additive;
and C: stirring the asphalt, the polymer and the additive composition at the stirring temperature of 100-120 ℃ until all the asphalt, the polymer and the additive composition are dissolved, discharging and cooling to normal temperature to obtain warm-mixed asphalt;
wherein the using amount of the asphalt is 85-90 wt%; the polymer is at least one of butadiene rubber BR, ABS resin and alkyd resin, and the using amount is 6-8 wt%; the additive composition consists of a USPA additive, a molecular weight regulator and a stabilizer, and the dosage of the additive composition is 2-5 wt%.
The preparation method of the warm mix asphalt comprises the step of stirring for 60-120 min under a high-speed shearing machine.
The preparation method of the warm-mixed asphalt comprises the following steps of mixing the asphalt with a hot-mix solvent, and then mixing the asphalt with a hot-mix solvent to obtain the warm-mixed asphalt.
The preparation method of the warm-mixed asphalt comprises the step of preparing the molecular weight regulator 2, 4-diphenyl-4-methyl-1-pentene.
The preparation method of the warm mix asphalt of the invention, wherein the average molecular weight of the molecular weight regulator is 238.4.
The preparation method of the warm-mixed asphalt comprises the step of adding at least one of light calcium carbonate and carbon black as a stabilizer.
The preparation method of the warm mix asphalt comprises the following steps of 0.15-0.35 wt% of molecular weight regulator, 0.5-1.65 wt% of stabilizer and the balance of USPA additive.
The invention can also be detailed as follows:
the technical scheme adopted by the invention for solving the technical problems is as follows:
the warm-mixed asphalt is characterized in that the adopted raw materials comprise base asphalt, polymer and additive composition; the asphalt-based composite material comprises, by percentage, 85-90 wt% of asphalt, 6-8 wt% of polymer and 2-5 wt% of additive; the polymer is at least one of butadiene rubber BR, ABS resin and alkyd resin, and the additive composition consists of USPA additive, molecular weight regulator and stabilizer.
Further, the matrix asphalt is asphalt prepared from petroleum products for road construction, and rubber modified asphalt can also be adopted.
Further, the molecular weight regulator of the additive was 2, 4-diphenyl-4-methyl-1-pentene with an average molecular weight of 238.4.
Further, the stabilizer of the additive is at least one of light calcium carbonate and carbon black.
In the components of the additive, the USPA additive is a novel warm mixing agent, and the USPA additive is used as an asphalt cooling material and is used for reducing the viscosity of asphalt so as to reduce the construction temperature; the molecular weight regulator is used for reducing the molecular weight of the polymer and facilitating the uniform dispersion of the polymer into asphalt, and the stabilizer is used for increasing the stability of the mixture and preventing the modified asphalt from being separated.
Further, the ratio of the molecular weight regulator to the stabilizer of the additive is preferably 1: 3-1: 4.
A preparation method of warm-mixed asphalt is characterized by comprising the following steps of A: weighing the components of asphalt, polymer and additive according to the weight percentage; b: heating the asphalt to 100-120 ℃ by using heating equipment; c: after the asphalt is melted, adding the polymer and the additive into the asphalt, and continuously keeping the temperature between 100 and 120 ℃; d: controlling the temperature within the range of 100-120 ℃, stirring by adopting a high-speed shearing machine to completely dissolve the asphalt, the polymer and the additive composition, stopping stirring, discharging and cooling to normal temperature to obtain a warm-mixed asphalt finished product.
Further, in the step D, the stirring time is 60-120 min.
The invention has the beneficial effects that:
(1) the invention has simple preparation process, and in the preparation process, the used raw materials of asphalt, polymer and additive can be simultaneously sheared and stirred after being mixed, thereby saving the process of independently shearing the raw materials, shortening the preparation time and saving the process cost compared with the prior art.
(2) According to the invention, by adding the proper amount of the polymer and the additive, when the temperature is higher than 140 ℃, the polymer and the additive exist in liquid state due to high temperature, and at the moment, a large amount of liquid formed by the polymer and the additive not only effectively reduces the high-temperature viscosity of the warm-mixed asphalt, but also can be effectively combined with the asphalt. The polymer and the additive contain a large amount of-C ═ O, -OH and-NH groups, and can be matched with-OH and-NH in the warm-mixed asphalt2The functional groups form hydrogen bonds, nonpolar long chain structures of the polymer and the additive extend in an extension, and due to mutual repulsion of the nonpolar structures, the polymer and the additive can disperse asphaltenes or colloid in the warm-mixed asphalt, so that the viscosity of the warm-mixed asphalt can be reduced, and compared with the prior art that the warm-mixed asphalt needs to be mixed at a high temperature of about 180 ℃, the mixing temperature is only 100-120 ℃, the mixing temperature of the warm-mixed asphalt and road construction auxiliary materials (such as stone materials) is reduced, and the temperature can be reduced to about 60 ℃. Meanwhile, the surface tension and the anti-stripping performance of the warm-mixed asphalt due to the amine components in the polymer and the additiveThe softening point of the warm-mixed asphalt is improved, the aging degree of the warm-mixed asphalt is greatly reduced, the heat storage stability of the warm-mixed asphalt is effectively improved, and the viscosity reduction effect is obvious.
(3) The invention also reduces the paving and rolling temperature in road construction, and compared with the common matrix asphalt mixture, the temperature of all construction operation can be reduced by at least 40 ℃, compared with the prior art, the invention can not generate asphalt smoke such as 3, 4-benzopyrene and the like in the preparation process, ensures the health of constructors, has the environmental benefits of energy conservation and emission reduction, reduces the construction cost, and improves the construction progress and the road construction quality.
(4) The invention can adopt rubber modified asphalt and asphalt prepared from common petroleum products as matrix asphalt, is more convenient for manual and mechanical construction under the conditions of low temperature and low oil-stone ratio, has sufficient paving and rolling time, and can lead the construction road to traffic as quickly as possible. The invention is widely suitable for the new construction, reconstruction and extension projects of urban main roads, express roads, expressways and first-level roads; the asphalt pavement curing agent can be packaged in vacuum, is convenient to use, has excellent performance, and is used for curing and minor repair of asphalt pavements.
Based on the above, the invention has good application prospect.
Drawings
The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a schematic view of the composition of a warm mix asphalt of the present invention.
Detailed Description
The present invention will be further specifically described with reference to the following examples, but the present invention is not limited to the following examples. Any modification which does not depart from the spirit and scope of the invention is deemed to be within the scope of the invention.
As shown in figure 1, the warm-mixed asphalt adopts the raw materials comprising base asphalt, polymer and additive; the asphalt-based composite material comprises, by percentage, 85-90% of asphalt, 6-8% of polymer and 2-5% of additive; the polymer is at least one of butadiene rubber BR, ABS resin and alkyd resin, and the additive is a composition of USPA additive, molecular weight regulator and stabilizer. The matrix asphalt is asphalt prepared from petroleum products for road construction, and can also adopt rubber modified asphalt. The molecular weight regulator of the additive was 2, 4-diphenyl-4-methyl-1-pentene with an average molecular weight of 238.4. The stabilizer of the additive is one of light calcium carbonate and carbon black. The ratio of the molecular weight regulator to the stabilizer of the additive is 1: 3-1: 4.
Example 1
The preparation method of the warm mix asphalt in the embodiment comprises the following steps of A: weighing 88% of asphalt, 8% of polymer and 4% of additive according to weight percentage; b: heating asphalt to 110 ℃ by using heating equipment; c: after the asphalt is melted, adding the polymer and the additive into the asphalt, and continuously keeping the temperature at 110 ℃; d: controlling the temperature within 110 ℃, stirring by adopting a high-speed shearing machine to completely dissolve the asphalt, the polymer and the additive composition, stopping stirring, discharging and cooling to normal temperature to obtain a warm-mixed asphalt finished product. In the step D, the stirring speed is 1000 r/min. The stirring time is 100 min. The matrix asphalt is asphalt prepared from petroleum products for road construction. The polymer is ABS resin, the molecular weight regulator of the additive is 2, 4-diphenyl-4-methyl-1-pentene, and the average molecular weight is 238.4. The stabilizer of the additive is carbon black. The ratio of the molecular weight regulator to the stabilizer of the additive is 1: 3.
Example 2
The preparation method of the warm mix asphalt in the embodiment comprises the following steps of A: weighing 90% of asphalt, 7% of polymer and 3% of additive according to weight percentage; b: heating asphalt to 120 ℃ by using heating equipment; c: after the asphalt is melted, adding the polymer and the additive into the asphalt, and continuously keeping the temperature at 120 ℃; d: controlling the temperature within 120 ℃, stirring by adopting a high-speed shearing machine to completely dissolve the asphalt, the polymer and the additive composition, stopping stirring, discharging and cooling to normal temperature to obtain a warm-mixed asphalt finished product. In the step D, the stirring speed is 1000 r/min. The stirring time was 120 min. The base asphalt is rubber modified asphalt. The polymer is butadiene rubber BR, and the molecular weight regulator of the additive is 2, 4-diphenyl-4-methyl-1-pentene, and the average molecular weight is 238.4. The stabilizer of the additive is light calcium carbonate. The ratio of the molecular weight regulator to the stabilizer of the additive is 1: 4.
Example 3
The preparation method of the warm mix asphalt in the embodiment comprises the following steps of A: 89% of asphalt, 6% of polymer and 5% of additive are weighed according to the weight percentage; b: heating the asphalt to 100 ℃ by using heating equipment; c: after the asphalt is melted, adding the polymer and the additive into the asphalt, and continuously keeping the temperature at 100 ℃; d: controlling the temperature within 100 ℃, stirring by adopting a high-speed shearing machine to completely dissolve the asphalt, the polymer and the additive composition, stopping stirring, discharging and cooling to normal temperature to obtain a warm-mixed asphalt finished product. In the step D, the stirring speed is 1000 r/min. The stirring time was 110 min. The matrix asphalt is asphalt prepared from petroleum products for road construction. The polymer is an alkyd resin. The molecular weight regulator of the additive was 2, 4-diphenyl-4-methyl-1-pentene with an average molecular weight of 238.4. The stabilizer of the additive is carbon black. The ratio of the molecular weight regulator to the stabilizer of the additive is 1: 3.
Comparative example 1
Prepared using the method of example 1 in chinese published patent CN 103305015A.
Comparative example 2
Prepared using the method of example 2 in chinese published patent CN 103305015A.
The polymer and the additive in the invention are solid matters with melting points below 140 ℃, and both the polymer and the additive exist in liquid forms due to the high temperature when the temperature is higher than 140 ℃, so that a large amount of liquid formed by the polymer and the additive can reduce the viscosity of the warm-mixed asphalt finished product and can be effectively combined with the asphalt. The polymer and additive of the present invention contain a large amount of-C ═ O, -OH and-NH groups, and can react with-OH and-NH groups in warm-mix asphalt2The functional groups form hydrogen bonds, the nonpolar long chain structures of the polymer and the additive extend in the extension, and due to the mutual repulsion of the nonpolar structures, the polymer and the additive can disperse the asphaltene or the colloid in the warm-mixed asphalt, so that the viscosity of the warm-mixed asphalt can be reduced, and the warm-mixed asphalt and the road can be reducedThe mixing temperature of construction auxiliary materials (such as stones) is reduced to about 40 ℃, manual and mechanical construction is facilitated, sufficient time is provided for paving and rolling, and a construction road can be quickly started as far as possible. Meanwhile, due to the existence of amine components in the polymer and the additive, the surface tension and the anti-stripping performance of the warm-mixed asphalt are improved, the flow performance and the adhesion performance of the finished warm-mixed asphalt are improved, and the high-temperature performance of the warm-mixed asphalt is improved.
The following Table 1 is a comparative table of reaction conditions for examples 1 to 3 and comparative examples 1 to 2:
TABLE 1
As can be seen from the comparative reaction condition table in Table 1 above, the preparation process of the present invention is simpler than that of the comparative example, and the reaction conditions are, for example: the heating temperature, the reaction temperature, the rotating speed, the time and the like of the asphalt are more moderate, and the reaction cost is saved; in addition, the construction operation temperature and the mixing temperature of the warm-mixed asphalt prepared by the preparation method are reduced by about 20 ℃ compared with the temperature of a comparative example, no asphalt smoke is generated in the preparation process, the preparation method has the environmental benefits of energy conservation and emission reduction, the construction cost is reduced, and the construction progress and the road construction quality are improved.
The following table 2 is a comparative analysis of each index data of the warm mix asphalt finished product prepared by the invention and the asphalt No. 70 commonly used in the existing road construction:
TABLE 2
As can be seen from Table 2, the viscosity of the warm mix asphalt of the present invention was significantly lower than that of the No. 70 base asphalt and comparative examples 1-2, reducing the processing conditions of the modified asphalt (warm mix asphalt finished product) at low temperature operation. Meanwhile, the high oil content of the invention ensures that the penetration degree of the modified asphalt is larger, which aims to meet the requirements of viscosity reduction in construction and asphalt molecule re-polymerization after paving and rolling, and can reach the pavement performance index of the asphalt pavement. The ductility of the warm mix asphalt finished product is higher than that of No. 70 matrix asphalt and comparative examples 1-2, and the warm mix asphalt has better low-temperature ductility and better low-temperature cracking resistance. The softening point of the warm-mixed asphalt finished product still meets the standard requirement, which shows that the warm-mixed asphalt finished product has high-temperature stability for road use.
The following table 3 is the comparative analysis of the technical indexes of the warm mix asphalt finished product and the stone mixture of the invention and the marshall test piece of the No. 70 asphalt and the stone mixture of the invention under the reference:
TABLE 3
Table 3 shows that the warm mix asphalt finished product mixture of the invention has the stability and the flow value meeting the specifications, has enough strength for roads to use, and has the mechanical property reaching the standard. The early strength is slightly lower than that of No. 70 base asphalt due to the oil component action of the formula, but the strength still has an increasing process through the action of light, oxygen and vehicles.
The following table 4 shows comparative analysis of each index data of the Sasobit warm-mix asphalt obtained by mixing and modifying the conventional Sasobit warm-mix agent and No. 70 asphalt according to the mass percentage of 4.75: 0.15:
TABLE 4
As can be seen from Table 4, the penetration, ductility and Brookfield viscosities of the warm mix asphalt finished product of the invention and the Sasobit warm mix asphalt are greatly different, and the larger the penetration, the softer the asphalt is, the smaller the viscosity is; the larger the ductility value, the better the plasticity; the Brookfield viscosity of the warm mix asphalt finished product is far less than that of Sasobit warm mix asphalt, which shows that the warm mix asphalt has better construction workability under the condition of the same temperature. The anti-aging degree of the obtained warm mix asphalt finished product is greater than that of the contrast Sasobit warm mix asphalt.
As shown in figure 1, the preparation method is simple, and polymers and additives which are low in cost and wide in application are used as modifiers of the warm-mixed asphalt in the preparation process; the finished product prepared from the warm-mixed asphalt and the asphalt not only effectively reduces the high-temperature viscosity of the warm-mixed asphalt, but also reduces the mixing temperature of the warm-mixed asphalt and road construction auxiliary materials (such as stone materials), the temperature can be reduced to about 40 ℃, meanwhile, the softening point of the warm-mixed asphalt is improved, the aging degree of the warm-mixed asphalt is greatly reduced, the heat storage stability of the warm-mixed asphalt is effectively improved, and the viscosity reduction effect is obvious; the invention also reduces the paving and rolling temperature in road construction, and compared with the common matrix asphalt mixture, the temperature of all construction operation can be reduced by at least 40 ℃, thereby ensuring the health of constructors, having the environmental benefits of energy conservation and emission reduction, reducing the construction cost, and improving the construction progress and the road construction quality. The invention can adopt rubber modified asphalt and asphalt prepared from common petroleum products as matrix asphalt, is more convenient for manual and mechanical construction under the conditions of low temperature and low oil-stone ratio, has sufficient paving and rolling time, and can lead the construction road to traffic as quickly as possible. The invention is widely suitable for the new construction, reconstruction and extension projects of urban main roads, express roads, expressways and first-level roads; the asphalt pavement curing agent can be packaged in vacuum, is convenient to use, has excellent performance, and is used for curing and minor repair of asphalt pavements.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The preparation method of the warm-mixed asphalt is characterized by comprising the following steps:
step A: heating the asphalt to 100-120 ℃ by using heating equipment;
and B: after the asphalt is melted, adding a polymer and an additive;
and C: stirring the asphalt, the polymer and the additive composition at the stirring temperature of 100-120 ℃ until all the asphalt, the polymer and the additive composition are dissolved, discharging and cooling to normal temperature to obtain warm-mixed asphalt;
wherein the using amount of the asphalt is 85-90 wt%; the polymer is at least one of butadiene rubber BR, ABS resin and alkyd resin, and the using amount is 6-8 wt%; the additive composition consists of a USPA additive, a molecular weight regulator and a stabilizer, and the dosage of the additive composition is 2-5 wt%.
2. The method for preparing warm mix asphalt according to claim 1, wherein the stirring is performed for 60-120 min under a high speed shearing machine.
3. The method for preparing warm-mixed asphalt according to claim 1, wherein the asphalt is asphalt prepared from petroleum products for road construction, or asphalt modified with rubber.
4. The method of claim 1, wherein the molecular weight regulator is 2, 4-diphenyl-4-methyl-1-pentene.
5. The method of claim 4, wherein the molecular weight regulator has an average molecular weight of 238.4.
6. The method of claim 1, wherein the stabilizer is at least one of light calcium carbonate and carbon black.
7. The method for preparing warm mix asphalt according to claim 1, wherein the amount of the molecular weight regulator is 0.15-0.35 wt%, the amount of the stabilizer is 0.5-1.65 wt%, and the balance is USPA additive.
8. A warm mix asphalt produced by the production method according to any one of claims 1 to 7.
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