Production method of composite modified asphalt

Abstract

The invention belongs to the field of composite modified asphalt, particularly relates to a production method of composite modified asphalt, and aims to solve the problems that raw materials cannot be fully and uniformly mixed, the uniformity cannot be effectively detected and controlled, and the quality cannot be guaranteed in the prior art. The method comprises the following steps: S1, quantifying matrix petroleum asphalt, and uniformly dividing the quantified matrix petroleum asphalt into 3-5 parts; quantifying the SBS modifier, and uniformly dividing the quantified SBS modifier into 3 to 5 parts; s2, one part of matrix petroleum asphalt is taken out and added into the stirring reaction kettle, and then one part of SBS modifier is added into the stirring reaction kettle, the raw materials can be mixed more easily, mixing of the raw materials is faster and more uniform, the uniformity is improved, and meanwhile the mixing uniformity of the raw materials can be detected and controlled.

Description

Technical Field

[0001] The invention relates to the technical field of composite modified asphalt, and in particular to a production method of composite modified asphalt. Background Art

[0002] Modified asphalt is an asphalt binder made by adding rubber, resin, high molecular polymer, ground rubber powder or other fillers or other external additives (modifiers), or by taking measures such as mild oxidation of asphalt to improve the performance of asphalt or asphalt mixture.

[0003] The patent document with publication number: CN101130635B discloses a method for producing composite modified asphalt, which mainly includes the following process steps: adding the base petroleum asphalt into a stirred reactor, and forming a closed-loop circulation system with a colloid mill and a stirrer, adding the SBS modifier and furfural extracted oil into the stirred reactor to obtain a mixed solution I; the mixed solution I is pumped into a finished product development tank; a stabilizer is added to obtain a mixed solution II; the mixed solution II is sent into a mixing tank with a jacket heating, and natural asphalt is added and stirred. The composite modified asphalt produced by the method of the present invention combines the advantages of SBS modified asphalt and natural asphalt, and can meet the needs under harsh working conditions. The practice of road application shows that the asphalt mixture produced by this natural composite modified asphalt has good paving performance, good stability and durability, and other transportation and storage methods are basically the same as SBS modified asphalt.

[0004] The above patent cannot make the raw materials fully mixed evenly during production, and the uniformity cannot be effectively detected and controlled, which leads to the inability to ensure the quality. Therefore, we propose a production method of composite modified asphalt to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art that the raw materials cannot be fully mixed evenly, the uniformity cannot be effectively detected and controlled, and thus the quality cannot be guaranteed, and a production method of composite modified asphalt is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for producing composite modified asphalt comprises the following steps:

[0008] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 3-5 portions; quantify the SBS modifier and evenly divide the quantified SBS modifier into 3-5 portions;

[0009] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 1-5 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 1-5 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0010] S3. Set 4-6 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0011] S4, quantifying the stabilizer, and dividing the quantified stabilizer into 3-5 portions;

[0012] S5. Add a portion of stabilizer to the mixed solution I, stir for 3-5 minutes, then add another portion of stabilizer, stir for another 3-5 minutes, until all the stabilizers are added to obtain a mixed solution II. Detect the stabilizer content at different positions through the detection points, and proceed to the next step if qualified;

[0013] S6. quantify the natural asphalt and divide the quantified natural asphalt into 3-5 portions;

[0014] S7. Add one portion of natural asphalt to the mixed solution II, stir for 3-5 minutes, then add another portion of natural asphalt, stir for 3-5 minutes, until all the natural asphalt is added to obtain a composite modified asphalt.

[0015] Preferably, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0016] Preferably, in S2, the stirred reactor is preheated to 50-60 degrees Celsius, and the base petroleum asphalt is added.

[0017] Preferably, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 1-5 minutes at a stirring speed of 300-400 r / min.

[0018] Preferably, in S3, the internal space of the stirred reactor is measured, the internal space is evenly divided according to the measurement data, and a detection point is set in each area.

[0019] Preferably, in S3, 4-6 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0020] Preferably, in S5, a portion of stabilizer is added to the mixed solution I, stirred for 3-5 minutes, and then another portion of stabilizer is added, and stirred for another 3-5 minutes, with a stirring speed of 350-450 r / min.

[0021] Preferably, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0022] Preferably, in S7, a portion of natural asphalt is added to the mixed liquid II and stirred for 3-5 minutes at a stirring speed of 450-550 r / min.

[0023] Preferably, in S7, the obtained composite modified asphalt is tested, and qualified ones are packaged and put into storage.

[0024] In the present invention, the beneficial effects of the production method of a composite modified asphalt are:

[0025] By quantifying the base petroleum asphalt, SBS modifier and stabilizer, dividing them evenly after quantification, and finally stirring and mixing them, the raw materials can be mixed more easily, and the mixing of the raw materials can be faster and more uniform, thereby improving the uniformity;

[0026] By setting up detection points in the stirred reactor, the content of each component in the raw material can be detected, and the uniformity can be judged by summarizing and analyzing, and the uniformity of the raw material mixing can be detected and controlled;

[0027] The present invention can make the raw materials easier to mix, and also make the mixing of the raw materials faster and more uniform, thereby improving the uniformity, and at the same time can detect and control the uniformity of the raw material mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a flow chart of a method for producing a composite modified asphalt. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1

[0031] Reference Figure 1 , a method for producing a composite modified asphalt, comprising the following steps:

[0032] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 3 parts; quantify the SBS modifier and evenly divide the quantified SBS modifier into 3 parts;

[0033] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 1 minute, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 1 minute, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0034] S3. Set 4 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0035] S4, quantifying the stabilizer, and dividing the quantified stabilizer into three portions;

[0036] S5. Add a portion of stabilizer to the mixed solution I, stir for 3 minutes, then add another portion of stabilizer, and stir for another 3 minutes until all the stabilizers are added to obtain a mixed solution II. The stabilizer content at different positions is tested through the detection points, and the next step is performed if qualified;

[0037] S6. quantify the natural asphalt and divide the quantified natural asphalt into three parts;

[0038] S7. Add one portion of natural asphalt to the mixed solution II, stir for 3 minutes, then add another portion of natural asphalt, stir for 3 minutes, until all the natural asphalt is added, to obtain a composite modified asphalt.

[0039] In this embodiment, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0040] In this embodiment, in S2, the stirred reactor is preheated to 50 degrees Celsius, and the base petroleum asphalt is added.

[0041] In this embodiment, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 1 minute at a stirring speed of 300 r / min.

[0042] In this embodiment, in S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

[0043] In this embodiment, in S3, four detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0044] In this embodiment, in S5, one portion of stabilizer is added to the mixed solution I, stirred for 3 minutes, and then another portion of stabilizer is added, and stirred for another 3 minutes, with a stirring speed of 350 r / min.

[0045] In this embodiment, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0046] In this embodiment, in S7, a portion of natural asphalt is added to the mixed solution II and stirred for 3 minutes at a stirring speed of 450 r / min.

[0047] In this embodiment, in S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

[0048] Embodiment 2

[0049] A method for producing composite modified asphalt comprises the following steps:

[0050] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 4 parts; quantify the SBS modifier and evenly divide the quantified SBS modifier into 4 parts;

[0051] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 2 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 2 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0052] S3. Set 5 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0053] S4, quantifying the stabilizer and dividing the quantified stabilizer into 4 portions;

[0054] S5. Add a portion of stabilizer to the mixed solution I, stir for 4 minutes, then add another portion of stabilizer, and stir for another 4 minutes until all the stabilizers are added to obtain a mixed solution II. The stabilizer content at different positions is detected by the detection point, and the next step is performed if it is qualified;

[0055] S6. quantify the natural asphalt and divide the quantified natural asphalt into 4 parts;

[0056] S7. Add one portion of natural asphalt to the mixed solution II, stir for 4 minutes, then add another portion of natural asphalt, stir for 4 minutes, until all the natural asphalt is added, to obtain a composite modified asphalt.

[0057] In this embodiment, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0058] In this embodiment, in S2, the stirred reactor is preheated to 52 degrees Celsius, and the base petroleum asphalt is added.

[0059] In this embodiment, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 2 minutes at a stirring speed of 320 r / min.

[0060] In this embodiment, in S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

[0061] In this embodiment, in S3, 5 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0062] In this embodiment, in S5, one portion of stabilizer is added to the mixed solution I, stirred for 4 minutes, and then another portion of stabilizer is added, and stirred for another 4 minutes, with a stirring speed of 360 r / min.

[0063] In this embodiment, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0064] In this embodiment, in S7, a portion of natural asphalt is added to the mixed solution II and stirred for 4 minutes at a stirring speed of 460 r / min.

[0065] In this embodiment, in S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

[0066] Embodiment 3

[0067] A method for producing composite modified asphalt comprises the following steps:

[0068] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 5 parts; quantify the SBS modifier and evenly divide the quantified SBS modifier into 5 parts;

[0069] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 3 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 3 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0070] S3. Set 6 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0071] S4, quantifying the stabilizer, and dividing the quantified stabilizer into 5 portions;

[0072] S5. Add a portion of stabilizer to the mixed solution I, stir for 5 minutes, then add another portion of stabilizer, and stir for another 5 minutes until all the stabilizers are added to obtain a mixed solution II. The stabilizer content at different positions is detected by the detection point, and the next step is performed if it is qualified;

[0073] S6. quantify the natural asphalt and divide the quantified natural asphalt into 5 portions;

[0074] S7. Add one portion of natural asphalt to the mixed solution II and stir for 5 minutes, then add another portion of natural asphalt and stir for 5 minutes until all the natural asphalt is added to obtain a composite modified asphalt.

[0075] In this embodiment, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0076] In this embodiment, in S2, the stirred reactor is preheated to 54 degrees Celsius, and the base petroleum asphalt is added.

[0077] In this embodiment, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 3 minutes at a stirring speed of 330 r / min.

[0078] In this embodiment, in S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

[0079] In this embodiment, in S3, 6 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0080] In this embodiment, in S5, one portion of stabilizer is added to the mixed solution I, stirred for 5 minutes, and then another portion of stabilizer is added, and stirred for another 5 minutes, with a stirring speed of 370 r / min.

[0081] In this embodiment, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0082] In this embodiment, in S7, a portion of natural asphalt is added to the mixed liquid II and stirred for 5 minutes at a stirring speed of 470 r / min.

[0083] In this embodiment, in S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

[0084] Embodiment 4

[0085] A method for producing composite modified asphalt comprises the following steps:

[0086] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 5 parts; quantify the SBS modifier and evenly divide the quantified SBS modifier into 5 parts;

[0087] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 5 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 5 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0088] S3. Set 6 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0089] S4, quantifying the stabilizer, and dividing the quantified stabilizer into 5 portions;

[0090] S5. Add a portion of stabilizer to the mixed solution I, stir for 5 minutes, then add another portion of stabilizer, and stir for another 5 minutes until all the stabilizers are added to obtain a mixed solution II. The stabilizer content at different positions is detected by the detection point, and the next step is performed if it is qualified;

[0091] S6. quantify the natural asphalt and divide the quantified natural asphalt into 5 portions;

[0092] S7. Add one portion of natural asphalt to the mixed solution II and stir for 5 minutes, then add another portion of natural asphalt and stir for 5 minutes until all the natural asphalt is added to obtain a composite modified asphalt.

[0093] In this embodiment, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0094] In this embodiment, in S2, the stirred reactor is preheated to 58 degrees Celsius, and the base petroleum asphalt is added.

[0095] In this embodiment, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 4 minutes at a stirring speed of 380 r / min.

[0096] In this embodiment, in S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

[0097] In this embodiment, in S3, 6 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0098] In this embodiment, in S5, one portion of stabilizer is added to the mixed solution I, stirred for 5 minutes, and then another portion of stabilizer is added, and stirred for another 5 minutes, with a stirring speed of 440 r / min.

[0099] In this embodiment, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0100] In this embodiment, in S7, a portion of natural asphalt is added to the mixed solution II and stirred for 5 minutes at a stirring speed of 530 r / min.

[0101] In this embodiment, in S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

[0102] Embodiment 5

[0103] A method for producing composite modified asphalt comprises the following steps:

[0104] S1. quantify the base petroleum asphalt and evenly divide the quantified base petroleum asphalt into 5 parts; quantify the SBS modifier and evenly divide the quantified SBS modifier into 5 parts;

[0105] S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 5 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 5 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I;

[0106] S3. Set 6 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified;

[0107] S4, quantifying the stabilizer, and dividing the quantified stabilizer into 5 portions;

[0108] S5. Add a portion of stabilizer to the mixed solution I, stir for 5 minutes, then add another portion of stabilizer, and stir for another 5 minutes until all the stabilizers are added to obtain a mixed solution II. The stabilizer content at different positions is detected by the detection point, and the next step is performed if it is qualified;

[0109] S6. quantify the natural asphalt and divide the quantified natural asphalt into 5 portions;

[0110] S7. Add one portion of natural asphalt to the mixed solution II and stir for 5 minutes, then add another portion of natural asphalt and stir for 5 minutes until all the natural asphalt is added to obtain a composite modified asphalt.

[0111] In this embodiment, in S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

[0112] In this embodiment, in S2, the stirred reactor is preheated to 60 degrees Celsius, and the base petroleum asphalt is added.

[0113] In this embodiment, in S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 5 minutes at a stirring speed of 400 r / min.

[0114] In this embodiment, in S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

[0115] In this embodiment, in S3, 6 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data is analyzed and judged to determine whether there is an error in the data of different detection points, and whether the error is within an acceptable range. If it is within the acceptable range, it is qualified.

[0116] In this embodiment, in S5, one portion of stabilizer is added to the mixed solution I, stirred for 5 minutes, and then another portion of stabilizer is added, and stirred for another 5 minutes, with a stirring speed of 450 r / min.

[0117] In this embodiment, in S5, the stabilizer content at different positions is detected through detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

[0118] In this embodiment, in S7, a portion of natural asphalt is added to the mixed solution II and stirred for 5 minutes at a stirring speed of 550 r / min.

[0119] In this embodiment, in S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

[0120] Experimental example

[0121] The composite modified asphalts prepared in Examples 1 to 5 were tested, and the results are shown in the following table:

[0122]

[0123] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for producing a composite modified asphalt, characterized in that: The following steps are involved: S1. quantify the base petroleum asphalt, and evenly divide the quantified base petroleum asphalt into 3-5 portions; Quantify the SBS modifier, and evenly divide the quantified SBS modifier into 3-5 portions; S2, taking out a portion of base petroleum asphalt and adding it to a stirred reactor, then adding a portion of SBS modifier to the stirred reactor, stirring for 1-5 minutes, then taking out another portion of base petroleum asphalt and adding it to the stirred reactor, and then taking out another portion of SBS modifier and adding it to the stirred reactor, stirring for 1-5 minutes, until the base petroleum asphalt and SBS modifier are added, to obtain a mixed solution I; S3. Set 4-6 detection points in the stirred reactor to detect the content of SBS modifier at different positions in the stirred reactor, analyze and judge the detection data, and proceed to the next process if qualified; S4, quantifying the stabilizer, and dividing the quantified stabilizer into 3-5 portions; S5. Add a portion of stabilizer to the mixed solution I, stir for 3-5 minutes, then add another portion of stabilizer, stir for another 3-5 minutes, until all the stabilizers are added to obtain a mixed solution II. Detect the stabilizer content at different positions through the detection points, and proceed to the next step if qualified; S6. quantify the natural asphalt and divide the quantified natural asphalt into 3-5 portions; S7. Add one portion of natural asphalt to the mixed solution II, stir for 3-5 minutes, then add another portion of natural asphalt, stir for 3-5 minutes, until all the natural asphalt is added to obtain a composite modified asphalt.

2. The method for producing a composite modified asphalt according to claim 1, characterized in that: In S1, the total amount of the base petroleum asphalt is weighed by an electronic weighing device, the weighing data is recorded, and then the mixture is evenly divided.

3. The method for producing a composite modified asphalt according to claim 2, characterized in that: In S2, the stirred reactor is preheated to 50-60 degrees Celsius, and the base petroleum asphalt is added.

4. The method for producing a composite modified asphalt according to claim 3, characterized in that: In S2, a portion of base petroleum asphalt is taken out and added into a stirred reactor, and then a portion of SBS modifier is added into the stirred reactor, and stirred for 1-5 minutes at a stirring speed of 300-400 r / min.

5. The method for producing a composite modified asphalt according to claim 4, characterized in that: In S3, the internal space of the stirred reactor is measured, and the internal space is evenly divided according to the measured data, and a detection point is set in each area.

6. The method for producing a composite modified asphalt according to claim 5, characterized in that: In S3, 4-6 detection points are set in the stirred reactor, the content of the SBS modifier at different positions in the stirred reactor is detected, and the detection data are analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

7. The method for producing a composite modified asphalt according to claim 6, characterized in that: In S5, a portion of stabilizer is added to the mixed solution I, and stirred for 3-5 minutes, and then another portion of stabilizer is added, and stirred for another 3-5 minutes, with a stirring speed of 350-450 r / min.

8. The method for producing a composite modified asphalt according to claim 7, characterized in that: In S5, the stabilizer content at different positions is detected through the detection points, and the detection data is analyzed and judged to determine whether there are errors in the data of different detection points and whether the errors are within an acceptable range. If they are within the acceptable range, they are qualified.

9. The method for producing a composite modified asphalt according to claim 8, characterized in that: In S7, a portion of natural asphalt is added to the mixed solution II and stirred for 3-5 minutes at a stirring speed of 450-550 r / min.

10. The method for producing a composite modified asphalt according to claim 9, characterized in that: In S7, the obtained composite modified asphalt is tested, and those that pass the test are packaged and put into storage.

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