Method for preparing heavy traffic road asphalt based on heavy-extracted oil from reduced four-line and heavy traffic road asphalt

Abstract

The present invention relates to the field of road asphalt, and specifically to a method for preparing heavy-traffic road asphalt based on heavy-extracted oil from a reduced-line oil, and the heavy-traffic road asphalt. Specifically, the method comprises the following steps: S1: subjecting an intermediate base crude oil to propane deasphalting treatment to obtain deoiled asphalt, wherein the deoiled asphalt has a needle penetration of 91 / 10mm-121 / 10m; and subjecting the reduced-line oil to furfural refining treatment to obtain heavy-traffic road asphalt from a reduced-line oil; S2: blending the deoiled asphalt with the heavy-extracted oil from a reduced-line oil to obtain heavy-traffic road asphalt. The method provided by the present invention can produce heavy-traffic road asphalt that meets the AH-70 or AH-90 specifications of GB / T15180-2010 by blending the deoiled asphalt with the heavy-extracted oil from a reduced-line oil, and has strong practicality and high economic benefits.

Description

Technical Field

[0001] The present invention relates to the field of road asphalt, and in particular to a method for preparing heavy-traffic road asphalt based on reduced four-line heavy-extracted oil and the heavy-traffic road asphalt. Background Art

[0002] Intermediate-base crude oil is a type of crude oil with properties between paraffin-based crude oil and naphthenic crude oil. It is usually used to produce light deasphalted oil and heavy deasphalted oil through propane deasphalting. Its by-product, deoiled asphalt, has high hardness and poor low-temperature performance and cannot be directly shipped as road asphalt. It is mainly used to prepare construction asphalt or sold as fuel oil, with low economic benefits.

[0003] CN109535747A discloses a No. 30 hard road asphalt, which comprises the following components, calculated by mass: 75-85 parts of vacuum residue oil, 10-20 parts of deoiled asphalt mixture, and 1-5 parts of furfural extracted oil mixture. The vacuum residue oil is an intermediate-base and / or cycloalkyl vacuum residue oil, and its needle penetration is 10-30 / 0.1mm; the deoiled asphalt mixture is a mixture of deoiled asphalt and heavy deasphalted oil in a mass ratio of 1:0.4-2.5, and the needle penetration after mixing is 70-90 / 0.1mm; the furfural extracted oil mixture is an extracted oil obtained by refining light deasphalted oil and fourth-line distillate oil with furfural, respectively, in a mass ratio of 1:2-4, and the aromatic hydrocarbon content after mixing is ≥80%.

[0004] However, the shortcoming of this method is that it can only produce No. 30 hard road asphalt that meets the "Technical Specifications for Highway Asphalt Pavement Construction of the Ministry of Transport" (JTG-F402004), but cannot produce heavy traffic road asphalt with higher penetration and higher ductility that meets the AH-70 and AH-90 specifications of GB / T15180-2010. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that heavy traffic road asphalt that meets the AH-70 and AH-90 specifications of GB / T15180-2010 cannot be prepared based on heavy-extracted oil extracted from a reduced fourth line, and to provide a method for preparing heavy traffic road asphalt based on heavy-extracted oil extracted from a reduced fourth line and heavy traffic road asphalt.

[0006] In order to achieve the above object, the present invention provides a method for preparing heavy traffic road asphalt based on the oil extracted from the reduced four-line heavy pump, comprising the following steps:

[0007] S1: performing propane deasphalting on the intermediate base crude oil to obtain deoiled asphalt; and

[0008] The fourth-line distillate oil is subjected to furfural refining treatment to obtain the fourth-line heavy-extracted oil;

[0009] S2: blending the deoiled asphalt with the heavy-extracted oil from the reduced four-line asphalt to obtain heavy-traffic road asphalt;

[0010] In step S1, the conditions of the propane deasphalting treatment are controlled so that the saturated hydrocarbon content of the deoiled asphalt is 5wt%-10wt%, the aromatic hydrocarbon content of the deoiled asphalt is 43wt%-47wt%, the asphaltene content of the deoiled asphalt is 45wt%-51wt%, and the needle penetration of the deoiled asphalt is 91 / 10mm-121 / 10m;

[0011] In step S1, the furfural refining treatment conditions are controlled so that the saturated hydrocarbon content of the reduced four-line heavy-extracted oil is 7wt%-10wt%, the aromatic hydrocarbon content of the reduced four-line heavy-extracted oil is 62wt%-70wt%, the colloid content of the reduced four-line heavy-extracted oil is 20wt%-30wt%, the asphaltene content of the reduced four-line heavy-extracted oil is 0.2wt%-1wt%, and the kinematic viscosity of the reduced four-line heavy-extracted oil at 100°C is 35mm 2 .s -1 -74mm 2 .s -1 ;

[0012] In step S2, the total weight of the deoiled asphalt and the weight-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 60-70 parts by weight and the weight-extracted oil accounts for 30-40 parts by weight.

[0013] Preferably, in step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 65°C-70°C.

[0014] Preferably, in step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not higher than 1.8 wt%.

[0015] Preferably, in step S1, the furfural refining treatment conditions are controlled so that the wax content of the four-line weight-extracted oil is not higher than 3.5 wt%.

[0016] Preferably, in step S1, the furfural refining treatment step includes:

[0017] S11: extracting the minus fourth distillate oil and the furfural in an extraction tower, wherein the minus fourth distillate oil is fed from a lower portion of the extraction tower, and the furfural is fed from an upper portion of the extraction tower, and a weight ratio of the minus fourth distillate oil to the furfural is 1:(1.8-2.8);

[0018] S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer liquid is separated to obtain the four-line-reduced heavy extracted oil.

[0019] More preferably, in step S11, the top temperature of the extraction tower is 123° C.-127° C., the bottom temperature is 88° C.-92° C., and the bottom pressure is 0.3 MPa-0.9 MPa.

[0020] More preferably, in step S12, the temperature of the sedimentation treatment is not greater than 55°C, the pressure is 0.2 MPa-0.8 MPa, and the sedimentation time is 15 min-30 min.

[0021] Preferably, in step S1, the furfural refining treatment conditions are controlled so that the flash point of the four-line-minus-reweighted oil is 240°C-265°C.

[0022] Preferably, in step S2, the total weight of the deoiled asphalt and the four-line weight-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 63-68 parts by weight and the four-line weight-extracted oil accounts for 32-37 parts by weight.

[0023] Preferably, in step S2, the temperature of the blending treatment is 120°C-140°C, and the blending time is 3 min-10 min.

[0024] Preferably, the intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Kaisarje crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hange crude oil and Oman crude oil.

[0025] More preferably, the intermediate base crude oil comprises the Angolan Plutone crude oil, the Kaisarje crude oil and the Saudi Arabian medium crude oil, wherein the content of the Angolan Plutone crude oil is 0wt%-10wt%, the content of the Kaisarje crude oil is 45wt%-65wt%, and the content of the Saudi Arabian medium crude oil is 35wt%-45wt%.

[0026] The second aspect of the present invention provides a heavy traffic road asphalt, which is prepared by the method provided by the first aspect of the present invention.

[0027] The method provided by the present invention can produce heavy-duty road asphalt that meets the AH-70 or AH-90 specification requirements of GB / T15180-2010 by blending the deoiled asphalt with the re-extracted oil from the reduced fourth-line crude oil. The preparation process is simple and the cost is low. High-value heavy-duty road asphalt is produced by utilizing the deoiled asphalt as a by-product produced by processing intermediate base crude oil and the re-extracted oil from the reduced fourth-line crude oil produced by refining furfural. The method has strong practicality and high economic benefits. DETAILED DESCRIPTION

[0028] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0029] As mentioned above, the first aspect of the present invention provides a method for preparing heavy traffic road asphalt based on the oil extracted from the reduced four-line heavy pump, comprising the following steps:

[0030] S1: performing propane deasphalting on the intermediate base crude oil to obtain deoiled asphalt; and

[0031] The fourth-line distillate oil is subjected to furfural refining treatment to obtain the fourth-line heavy-extracted oil;

[0032] S2: blending the deoiled asphalt with the heavy-extracted oil from the reduced four-line asphalt to obtain heavy-traffic road asphalt;

[0033] In step S1, the conditions of the propane deasphalting treatment are controlled so that the saturated hydrocarbon content of the deoiled asphalt is 5wt%-10wt%, the aromatic hydrocarbon content of the deoiled asphalt is 43wt%-47wt%, the asphaltene content of the deoiled asphalt is 45wt%-51wt%, and the needle penetration of the deoiled asphalt is 91 / 10mm-121 / 10m;

[0034] In step S1, the furfural refining treatment conditions are controlled so that the saturated hydrocarbon content of the four-line heavy-extracted oil is 7wt%-10wt%, the aromatic hydrocarbon content of the four-line heavy-extracted oil is 62wt%-70wt%, the colloid content of the four-line heavy-extracted oil is 20wt%-30wt%, and the asphaltene content of the four-line heavy-extracted oil is 0.2wt%-1wt%;

[0035] In step S2, the total weight of the deoiled asphalt and the weight-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 60-70 parts by weight and the weight-extracted oil accounts for 30-40 parts by weight.

[0036] It should be noted that, in the present invention, the needle penetration is measured under the conditions of 25°C, within 5s, and 100 load, and the unit is: 1 / 10mm.

[0037] The method provided by the present invention comprises the following steps: blending deoiled asphalt obtained by processing intermediate base crude oil with fourth-line degassing heavy-extracted oil obtained by subjecting fourth-line degassing distillate oil to furfural refining treatment to obtain heavy-duty road asphalt that meets the AH-70 or AH-90 specification requirements of GB / T15180-2010. The preparation process is simple, the cost is low, the practicability is strong, and the economic benefit is high.

[0038] According to some preferred embodiments of the present invention, in step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 65°C-70°C.

[0039] According to some preferred embodiments of the present invention, in step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not higher than 1.8 wt%.

[0040] According to some preferred embodiments of the present invention, in step S1, the furfural refining treatment conditions are controlled so that the wax content of the four-line weight-extracted oil is not higher than 3.5 wt%.

[0041] According to some preferred embodiments of the present invention, in step S1, the furfural refining process comprises:

[0042] S11: extracting the minus fourth distillate oil and the furfural in an extraction tower, wherein the minus fourth distillate oil is fed from a lower portion of the extraction tower, and the furfural is fed from an upper portion of the extraction tower, and a weight ratio of the minus fourth distillate oil to the furfural is 1:(1.8-2.8);

[0043] S12: After the extracted oil produced at the bottom of the extraction tower is subjected to sedimentation treatment, the lower layer liquid is separated to obtain the four-line-reduced heavy extracted oil.

[0044] The four-line heavy extraction oil obtained under the preferred conditions can be blended with deoiled asphalt to produce heavy traffic asphalt, which can produce heavy traffic asphalt with better performance.

[0045] According to some preferred embodiments of the present invention, in step S11, the top temperature of the extraction tower is 123° C.-127° C., the bottom temperature is 88° C.-92° C., and the bottom pressure is 0.3 MPa-0.9 MPa.

[0046] According to some preferred embodiments of the present invention, in step S12, the temperature of the sedimentation treatment is not greater than 55°C, the pressure is 0.2MPa-0.8MPa, and the sedimentation time is 15min-30min.

[0047] According to some preferred embodiments of the present invention, the furfural refining treatment conditions are controlled so that the flash point of the reduced four-line heavy-extracted oil is 240° C.-265° C. Under these preferred conditions, heavy-duty road asphalt with even better performance can be produced.

[0048] According to some preferred embodiments of the present invention, in step S2, the deoiled asphalt and the reduced-line heavy-extracted oil are blended together to form 100 parts by weight, with the deoiled asphalt comprising 63-68 parts by weight and the reduced-line heavy-extracted oil comprising 32-37 parts by weight. Under these preferred conditions, heavy-duty road asphalt meeting the AH-90 specification requirements of GB / T 15180-2010 can be produced.

[0049] According to some preferred embodiments of the present invention, in step S2, the temperature of the blending treatment is 120° C.-140° C., and the blending time is 3 min-10 min.

[0050] According to some preferred embodiments of the present invention, the intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Kaisarje crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hango crude oil, and Oman crude oil.

[0051] According to some preferred embodiments of the present invention, the intermediate base crude oil comprises Angolan Plutoni crude oil, Kaisarge crude oil, and Saudi Arabian medium crude oil. The intermediate base crude oil comprises 0-10 wt% of Angolan Plutoni crude oil, 45-65 wt% of Kaisarge crude oil, and 35-45 wt% of Saudi Arabian medium crude oil. Under these preferred conditions, heavy-duty road asphalt with superior performance can be produced.

[0052] The second aspect of the present invention provides a heavy traffic road asphalt prepared by the method provided by the first aspect of the present invention. The heavy traffic road asphalt meets the requirements of AH-70 or AH-90 of GB / T15180-2010.

[0053] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, the various raw materials used can be obtained from commercial sources. It should be noted that in the following examples, each 1 part by weight represents 1 kg.

[0054] Intermediate base crude oil:

[0055] Angola Plutoni crude oil, Kaiserja crude oil, Saudi Arabian Medium crude oil.

[0056] The above-mentioned crude oil was purchased by China International Petroleum & Chemical Corporation.

[0057] Furfural was purchased from Pingquan Fengsheng Chemical Co., Ltd. with a purity of >98.5%.

[0058] Intermediate base crude oil blend A (hereinafter referred to as blended crude oil A): based on the total weight of the blended crude oil A being 100 parts by weight, wherein the blended crude oil is a mixture of 40 parts by weight of Saudi Arabian intermediate crude oil, 5 parts by weight of Angolan Plutoni crude oil, and 55 parts by weight of Kaisarja crude oil;

[0059] Intermediate base crude oil blend B (hereinafter referred to as blended crude oil B): based on the total weight of the blended crude oil B being 100 parts by weight, the blended crude oil is a mixture of 50 parts by weight of Saudi Arabian intermediate crude oil and 50 parts by weight of Kaiserje crude oil.

[0060] Example 1

[0061] S1: performing propane deasphalting on the intermediate base crude oil to obtain deoiled asphalt; and

[0062] The fourth-line distillate oil is subjected to furfural refining treatment to obtain the fourth-line heavy-extracted oil;

[0063] S2: blending the deoiled asphalt with the heavy-extracted oil from the reduced four-line asphalt to obtain heavy-traffic road asphalt;

[0064] In step S1, the conditions of the propane deasphalting treatment are controlled so that the saturated hydrocarbon content of the deoiled asphalt is 6.73 wt%, the aromatic hydrocarbon content of the deoiled asphalt is 45.29 wt%, and the asphaltene content of the deoiled asphalt is 47.98 wt%;

[0065] In step S1, the furfural refining treatment conditions are controlled so that the saturated hydrocarbon content of the reduced four-line heavy-extracted oil is 7.46 wt%, the aromatic hydrocarbon content of the reduced four-line heavy-extracted oil is 65.49 wt%, the colloid content of the reduced four-line heavy-extracted oil is 25.75 wt%, the asphaltene content of the reduced four-line heavy-extracted oil is 0.89 wt%, and the kinematic viscosity of the reduced four-line heavy-extracted oil at 100°C is 73.45 mm 2 .s -1 ;

[0066] In step S2, the total weight of the deoiled asphalt and the weight-extracted oil minus four-line is 100 parts by weight, wherein the deoiled asphalt accounts for 69 parts by weight and the weight-extracted oil minus four-line accounts for 31 parts by weight;

[0067] In step S1, the furfural refining process includes:

[0068] S11: extracting the minus fourth distillate oil and the furfural in an extraction tower, wherein the minus fourth distillate oil is fed from a lower portion of the extraction tower, and the furfural is fed from an upper portion of the extraction tower, and a weight ratio of the minus fourth distillate oil to the furfural is 1:2.3;

[0069] S12: subjecting the extracted oil produced at the bottom of the extraction tower to sedimentation treatment, and separating the lower layer liquid to obtain heavy extracted oil;

[0070] Wherein, in step S11, the top temperature of the extraction tower is 125°C, the bottom temperature is 90°C, and the bottom pressure is 0.7 MPa;

[0071] In step S12, the temperature of the sedimentation treatment is 45°C, the pressure is 0.5 MPa, and the sedimentation time is 20 min;

[0072] In step S2, the temperature of the blending treatment is 120° C.-140° C., and the blending time is 5 minutes.

[0073] Specifically, various parameters in the preparation process are shown in Table 1 below, and performance parameters of the prepared heavy traffic road asphalt are shown in Table 2 below.

[0074] Example 2

[0075] The process was carried out in a similar manner to that of Example 1, except that the ratio of the deoiled asphalt to the heavy-extracted oil from the fourth-line reduction process in step S2 was adjusted.

[0076] Example 3

[0077] The method is similar to that of Example 1, except that the type of intermediate base crude oil and the ratio of deoiled asphalt to the heavy-extracted oil from the fourth-line reduction in step S2 are changed.

[0078] Example 4

[0079] The method is similar to that of Example 1, except that in step S1, the furfural refining treatment is carried out as follows:

[0080] In step S1, the furfural refining process includes:

[0081] S11: extracting the minus fourth line distillate oil and the furfural in an extraction tower, wherein the minus fourth line distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the weight ratio of the minus fourth line distillate oil to the furfural is 1:1;

[0082] S12: subjecting the extracted oil produced at the bottom of the extraction tower to sedimentation treatment, and separating the lower layer liquid to obtain heavy extracted oil;

[0083] Wherein, in step S11, the top temperature of the extraction tower is 125°C, the bottom temperature is 90°C, and the bottom pressure is 0.7 MPa;

[0084] In step S12, the temperature of the sedimentation treatment is 45°C, the pressure is 0.5 MPa, and the sedimentation time is 20 minutes.

[0085] Specifically, various parameters in the preparation process are shown in Table 1 below, and performance parameters of the prepared heavy traffic road asphalt are shown in Table 2 below.

[0086] Comparative Example 1

[0087] The process was carried out in a similar manner to that of Example 1, except that the ratio of deoiled asphalt to re-extracted oil in step S2 was adjusted.

[0088] Comparative Example 2

[0089] The process was carried out in a similar manner to that of Example 1, except that the ratio of deoiled asphalt to re-extracted oil in step S2 was adjusted.

[0090] Table 1

[0091]

[0092]

[0093] Table 2

[0094]

[0095]

[0096] It can be seen from the results in Tables 1 and 2 that the method of the embodiment of the present invention can produce heavy traffic road asphalt with quality meeting the AH-70 or AH-90 specifications of GB / T15180-2010 using deoiled asphalt and reduced four-line heavy extraction oil.

[0097] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A method for preparing heavy traffic road asphalt based on oil extracted from a four-line reduction reactor, characterized in that: Use the following steps: S1: Propane deasphalting the intermediate base crude oil to obtain deoiled asphalt; as well as The fourth-line distillate oil is subjected to furfural refining treatment to obtain the fourth-line heavy-extracted oil; S2: blending the deoiled asphalt with the heavy-extracted oil from the reduced four-line asphalt to obtain heavy-traffic road asphalt; In step S1, the conditions of the propane deasphalting treatment are controlled so that the saturated hydrocarbon content of the deoiled asphalt is 5 wt%-10 wt%, the aromatic hydrocarbon content of the deoiled asphalt is 43 wt%-47 wt%, the asphaltene content of the deoiled asphalt is 45 wt%-51 wt%, and the needle penetration of the deoiled asphalt is 9 1 / 10 mm-12 1 / 10 m; In step S1, the furfural refining process includes: S11: extracting the minus fourth distillate oil and the furfural in an extraction tower, wherein the minus fourth distillate oil is fed from the lower part of the extraction tower, and the furfural is fed from the upper part of the extraction tower, and the weight ratio of the minus fourth distillate oil to the furfural is 1:(1.8-2.8); S12: subjecting the extracted oil produced at the bottom of the extraction tower to sedimentation treatment, and separating the lower layer liquid to obtain the four-line-reduced heavy extracted oil; In step S1, the furfural refining treatment conditions are controlled so that the saturated hydrocarbon content of the reduced fourth-line heavy-extracted oil is 7wt%-10wt%, the aromatic hydrocarbon content of the reduced fourth-line heavy-extracted oil is 62wt%-70wt%, the colloid content of the reduced fourth-line heavy-extracted oil is 20wt%-30wt%, the asphaltene content of the reduced fourth-line heavy-extracted oil is 0.2wt%-1wt%, and the kinematic viscosity of the reduced fourth-line heavy-extracted oil at 100°C is 35mm 2 .s -1 -74mm 2 .s -1 ; In step S2, the total weight of the deoiled asphalt and the weight-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 60-70 parts by weight and the weight-extracted oil accounts for 30-40 parts by weight.

2. The method according to claim 1, characterized in that In step S1, the conditions of the propane deasphalting treatment are controlled so that the softening point of the deoiled asphalt is 65°C-70°C.

3. The method according to claim 1, characterized in that In step S1, the conditions of the propane deasphalting treatment are controlled so that the wax content of the deoiled asphalt is not higher than 1.8 wt%.

4. The method according to claim 1, wherein In step S1, the furfural refining treatment conditions are controlled so that the wax content of the four-line-reduced heavy oil is not higher than 3.5 wt%.

5. The method according to claim 1, wherein In step S11, the top temperature of the extraction tower is 123° C.-127° C., the bottom temperature is 88° C.-92° C., and the bottom pressure is 0.3 MPa-0.9 MPa.

6. The method according to claim 1, characterized in that In step S12, the temperature of the sedimentation treatment is not greater than 55°C, the pressure is 0.2MPa-0.8MPa, and the sedimentation time is 15min-30min.

7. The method according to any one of claims 1 to 6, characterized in that In step S1, the furfural refining treatment conditions are controlled so that the flash point of the four-line-minus-redrawn oil is 240°C-265°C.

8. The method according to any one of claims 1 to 6, characterized in that In step S2, the total weight of the deoiled asphalt and the weight-extracted oil subjected to the blending treatment is 100 parts by weight, wherein the deoiled asphalt accounts for 63-68 parts by weight and the weight-extracted oil accounts for 32-37 parts by weight.

9. The method according to any one of claims 1 to 6, characterized in that In step S2, the temperature of the blending treatment is 120°C-140°C, and the time is 3 minutes-10 minutes.

10. The method according to any one of claims 1 to 6, characterized in that The intermediate base crude oil is selected from at least one of Angola Plutoni crude oil, Kaisarje crude oil, Saudi Arabian medium crude oil, Mahila crude oil, Hange crude oil and Oman crude oil.

11. The method according to claim 10, characterized in that The intermediate base crude oil includes the Angolan Plutoni crude oil, the Kaisarge crude oil and the Saudi Arabian medium crude oil. In the intermediate base crude oil, the content of the Plutoni crude oil is 0wt%-10wt%, the content of the Kaisarge crude oil is 45wt%-65wt%, and the content of the Saudi Arabian medium crude oil is 35wt%-45wt%.

12. A heavy traffic road asphalt, characterized in that: Prepared by the method described in any one of claims 1 to 11.

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