A method and system for compounding a performance recovery type regenerative agent

Abstract

The application discloses a kind of targeted performance recovery type regenerant compounding method and system, it is related to road engineering technical field, compounding method includes: obtaining the performance characterization parameter of aging asphalt in old asphalt pavement material, and constructs aging asphalt performance matrix;According to the target incorporation amount of old asphalt pavement material, the target performance matrix of regenerated asphalt is constructed;According to aging asphalt performance matrix, candidate regenerant is determined, and the performance characterization parameter of the regenerated asphalt that candidate regenerant is mixed with aging asphalt based on preset incorporation amount, and the performance matrix of regenerated asphalt is constructed;According to aging asphalt performance matrix, target performance matrix and regenerated asphalt performance matrix, multi-index mixed model and object function are constructed, and target regenerant and optimal compounding weight coefficient are determined, and the compounding scheme of targeted performance recovery type regenerant is obtained.The application can realize the recovery of aging asphalt, and is suitable for the production and application of regenerated asphalt.

Description

Technical Field

[0001] This invention belongs to the field of road engineering technology, specifically relating to a method and system for compounding a targeted performance-restoring regenerant. Background Technology

[0002] Asphalt pavement is an important transportation infrastructure, and its efficient maintenance and recycling have significant economic benefits and value. The recycling of old asphalt pavement materials (RAP) usually relies on recycling agents to restore the properties of the aged asphalt.

[0003] However, existing asphalt pavement recycling technologies generally suffer from the following drawbacks: 1) Low efficiency and poor targeting. Most existing recycling agents are empirical or general-purpose formulations, lacking quantitative design and precise control based on the specific properties of aged asphalt. This results in poor controllability of the recycling process, large fluctuations in performance, and low overall recycling efficiency. 2) Incomplete performance recovery. Due to the lack of precise guidance on the dosage and component ratio of recycling agents, it is difficult to systematically restore the key performance indicators of aged asphalt (such as penetration and PG classification) to near-new asphalt standards, affecting the long-term road performance and durability of recycled mixtures. Therefore, it is necessary to develop a scientifically quantified and precisely targeted recycling agent formulation method. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a method and system for compounding rejuvenating agents with targeted performance recovery. The rejuvenating agent compounding method provided by this invention can solve the problems of low efficiency, poor targeting, and incomplete recovery of existing rejuvenating agents, achieving reliable and controllable recovery of aged asphalt, ensuring that its key indicators can stably reach or approach the target engineering requirements, and has significant economic and environmental benefits.

[0005] This invention provides the following technical solution: Firstly, a method for compounding a targeted performance-restoring regenerant is provided, comprising: Obtain the performance characterization parameters of aged asphalt in old asphalt pavement materials and construct the performance matrix of aged asphalt; Based on the target incorporation amount of old asphalt pavement materials, construct the target performance matrix of recycled asphalt; Candidate recycling agents are determined based on the performance matrix of aged asphalt. Based on the performance characterization parameters of recycled asphalt prepared by mixing the candidate recycling agents with aged asphalt at a preset dosage, a performance matrix of recycled asphalt is constructed. Based on the performance matrix of aged asphalt, the target performance matrix, and the performance matrix of recycled asphalt, a multi-index hybrid model and object function are constructed, and the target rejuvenator and its optimal compounding weight coefficient are determined to obtain the compounding scheme of the targeted performance recovery rejuvenator.

[0006] Furthermore, the properties involved in the aged asphalt performance matrix, the target performance matrix, and the recycled asphalt performance matrix include at least three of the following: penetration, softening point, ductility, PG grading index, or the proportion of the four components.

[0007] Furthermore, the target performance matrix is ​​determined based on the target incorporation amount of the old asphalt pavement material: If the target admixture content of old asphalt pavement material accounts for less than 30% of the mass of recycled asphalt mixture, then the target performance matrix of recycled asphalt adopts the new asphalt standard required by the target project. If the target admixture of old asphalt pavement material is ≤30% of the mass of recycled asphalt mixture, the target performance matrix of recycled asphalt is based on the new asphalt standard required by the target project, ensuring that the target value of ductility at 10℃ is ≥20cm and the PG high temperature grade is 70~76. If the target admixture content of old asphalt pavement material accounts for more than 50% of the mass of recycled asphalt mixture, then the target performance matrix of recycled asphalt is based on the new asphalt standard required by the target project, ensuring that the target value of ductility at 10℃ is ≥20 cm, the improvement level of PG low temperature grade is ≥1, and the PG high temperature grade is 76~82.

[0008] Furthermore, the candidate regenerators include at least two of aromatic hydrocarbon oil regenerators, cycloalkane oil regenerators, vegetable oil-based regenerators, or polymer-modified regenerators.

[0009] Furthermore, the preset dosage is a preset percentage of the mass of each candidate recycling agent relative to the mass of the aged asphalt, and the preset dosage is 0.5% to 5%, preferably 1% for each candidate recycling agent.

[0010] Furthermore, the aged asphalt performance matrix P age The expression is: ; in, j The number of performance characterization parameters for aged asphalt. P a1 , P a2 , P a3 , P aj The aged asphalt is the first 1 , 2 , 3 , j A type of performance characterization parameter.

[0011] Furthermore, the target performance matrix of the recycled asphalt P TThe expression is: ; in, k Number of target performance parameters for recycled asphalt ，P t1 、P t2 、P t3 、P tk They are respectively the recycled asphalt 1 , 2 , 3 , k Target performance parameters.

[0012] Furthermore, the performance matrix of the recycled asphalt P Ri The expression is: ; in, h The number of performance characterization parameters for recycled asphalt. P r1 、P r2 、P r3 、P rh These are the first batches of recycled asphalt. 1 , 2 , 3 , h A type of performance characterization parameter.

[0013] Furthermore, the determination of the target regenerant and its optimal compounding weight coefficient to obtain the compounding scheme of the targeted performance-restoring regenerant includes: Establish a multi-indicator hybrid model P S The expression is: ; in, n The number of candidate regenerants. i Candidate regenerant types, V i For the first i The compounding weighting coefficients of the candidate regenerants, P Ri The performance matrix of recycled asphalt; by The target regenerant and its optimal compound weight coefficients are obtained by solving for the object function. The optimal dosage of the target regenerant is calculated based on the optimal compounding weight coefficient. M v : ; in, v For the target regenerant type, the optimal dosage of the target regenerant. M v For the first v The percentage of the target rejuvenator by mass relative to the mass of aged asphalt. W v For the first v The preset dosage of the candidate regenerant.

[0014] Secondly, a targeted performance-restoring regenerant compounding system is provided, comprising: The aging asphalt performance matrix construction module is used to obtain the performance characterization parameters of aging asphalt in old asphalt pavement materials and construct the aging asphalt performance matrix. The target performance matrix construction module for recycled asphalt is used to construct the target performance matrix of recycled asphalt based on the target admixture amount of old asphalt pavement materials. The recycled asphalt performance matrix construction module is used to determine candidate recycling agents based on the aged asphalt performance matrix, and to construct the recycled asphalt performance matrix based on the performance characterization results of recycled asphalt prepared by mixing the candidate recycling agents with aged asphalt at a preset dosage. The scheme determination module is used to construct a multi-index hybrid model and object function based on the performance matrix of aged asphalt, the target performance matrix and the performance matrix of recycled asphalt, and to determine the target rejuvenator and its optimal compounding weight coefficient, so as to obtain the compounding scheme of the targeted performance recovery rejuvenator.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention has strong targeting and thorough recovery. Through quantitative characterization and precise calculation of multiple indicators, the compounding of the recycling agent is improved to the level of customization and quantification, which can ensure that the key performance indicators of aged asphalt are completely restored. This invention first constructs the performance matrix of aged asphalt, the performance matrix of target asphalt and the performance matrix of recycled asphalt. Through the multi-index mixing model and object function, the target recycling agent and its optimal compounding weight coefficient are obtained, and then the targeted performance recovery recycling agent is formulated. The recycled asphalt formulated with the targeted performance recovery recycling agent can achieve 100% performance recovery of aged asphalt, solving the problems of low efficiency, poor targeting and incomplete performance recovery of existing recycling agents. (2) The method provided by the present invention has high efficiency in determining the recycling agent, stable performance of the prepared recycled asphalt, and precise compounding method avoids performance deviation caused by empirical addition of recycling agent, improves the recycling efficiency of aged asphalt, and ensures the long-term stability and reliability of the service performance of recycled asphalt mixture. (3) The method provided by the present invention is scientific in its quantification, and uses mathematical models to replace conventional empirical ratios, thereby improving the repeatability and engineering applicability of regenerant design. Attached Figure Description

[0016] Figure 1 This is a flowchart of the targeted performance-restoring regenerant compounding method of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0018] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. The terms "comprising," "including," "having," "containing," etc., as used herein are open-ended, meaning they include but are not limited to.

[0019] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Every smaller range between any stated value or intermediate value within a stated range, and any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0020] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar to or equivalent to those described herein may be used in the implementation or testing of this invention.

[0021] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be readily apparent to those skilled in the art. This specification and embodiments are merely exemplary.

[0022] Example 1

[0023] like Figure 1 As shown, the present invention provides a method for compounding a targeted performance-restoring regenerant, comprising the following steps: S1. Obtain the performance characterization parameters of aged asphalt in old asphalt pavement materials and construct the performance matrix of aged asphalt. P age ; S2. Construct a target performance matrix for recycled asphalt based on the target admixture content of the old asphalt pavement material. P T ; S3. Based on the performance matrix of aged asphalt, determine candidate recycling agents, and construct a performance matrix of recycled asphalt based on the performance characteristics parameters of recycled asphalt prepared from candidate recycling agents at preset dosages and aged asphalt. P Ri ; S4. Based on the performance matrix of aged asphalt P age Target performance matrix P T and the performance matrix of recycled asphalt P Ri A multi-index hybrid model and object function are constructed, and the target regenerant and its optimal compounding weight coefficient are determined to obtain the compounding scheme of the targeted performance recovery regenerant. S5. The target regenerant is compounded according to the compounding scheme. The target regenerant is added in sequence according to the viscosity increase order of different regenerants and stirred. The stirring time of any one of the target regenerants is 3~5 min, and the total stirring time is ≤30 min. After the preparation is completed, it is allowed to stand for 1~2 h to obtain the targeted performance recovery regenerant.

[0024] In some possible embodiments, the aged asphalt is extracted from old asphalt pavement materials using the Absen method, and the extraction process strictly follows the standard procedure described in the Chinese transportation industry standard "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" JTG E20-2011.

[0025] In some possible embodiments, the aged asphalt performance matrix P age Target performance matrix P T and the performance matrix of recycled asphalt P Ri The properties involved include penetration, softening point, ductility, PG grading index (including high and low temperature performance based on complex shear modulus G*) or multiple of the four-component ratios.

[0026] In some possible embodiments, the target incorporation amount of old asphalt pavement material is determined according to the requirements of the target project, and the target performance matrix is... P T Determined based on the target admixture content of the old asphalt pavement material: If the target admixture content of old asphalt pavement material accounts for less than 30% of the mass of recycled asphalt mixture, the target performance matrix of recycled asphalt adopts the new asphalt standard required by the target project. If the target admixture of old asphalt pavement material is 30%≤ and the proportion of recycled asphalt mixture mass is ≤50%, the target performance matrix of recycled asphalt is based on the new asphalt standard required by the target project, prioritizing low-temperature ductility, with the goal of ensuring low-temperature crack resistance and durability, including a target value of 10℃ ductility ≥20 cm, PG high temperature grade of 70~76, and other performance indicators are determined according to the road grade of the target project within the performance range allowed by the corresponding specifications. If the target admixture content of old asphalt pavement material accounts for more than 50% of the mass of recycled asphalt mixture, the target performance matrix of recycled asphalt is based on the new asphalt standard required by the target project, with the goal of significantly improving low-temperature performance and ductility. This includes a target value of ductility at 10℃ ≥ 20 cm, an improvement grade of PG low temperature grade ≥ 1, and a PG high temperature grade of 76~82. Other performance indicators are determined according to the road grade of the target project, within the performance range allowed by the corresponding specifications.

[0027] In this embodiment, the core of constructing a multi-index hybrid model lies in establishing a quantitative relationship between the recycling agent ratio and the performance of recycled asphalt. The multi-index hybrid model may take the form of, but is not limited to, a linear model or other mathematical optimization models. In some possible embodiments, the multi-index hybrid model adopts a linear model. P S The preset performance matrix is ​​a linear combination of the performance matrix of recycled asphalt obtained by mixing different recycling agents with aged asphalt at preset dosages.

[0028] A linear model is used to establish a multi-index mixed model. P S The expression is: ; in, n The number of candidate regenerants. i Candidate regenerant types, V i For the first i The compounding weighting coefficients of the candidate regenerants, P Ri This is the performance matrix of recycled asphalt.

[0029] by The target regenerant and its optimal compound weight coefficients are obtained by solving for the object function. The optimal dosage of the target regenerant is calculated based on the optimal compounding weight coefficient. M v : ; in, v For the target regenerant type, the optimal dosage of the target regenerant.M v For the first v The percentage of the target rejuvenator by mass relative to the mass of aged asphalt. W v For the first v The preset dosage of the candidate regenerant, i.e., the first v The predetermined percentage of the mass of the candidate recycling agent relative to the mass of aged asphalt.

[0030] Example 2

[0031] This embodiment provides a compounding scheme for a targeted performance-restoring regenerant based on Embodiment 1.

[0032] Aged asphalt was extracted from RAP (Rich Asphalt Acrylic Acid) recovered from a highway using the Absen extraction method. The extraction process strictly followed the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The extracted aged asphalt underwent physical and chemical property tests, and a performance matrix of the aged asphalt was obtained. P age The target RAP incorporation amount is 20% of the mass of the recycled asphalt mixture, and the target performance matrix of the recycled asphalt is... P T Following the new asphalt standards, three recycling agents, A, B, and C, were selected and mixed with aged asphalt at a predetermined dosage of 1% to prepare recycled asphalt. Their properties were then tested, and a performance matrix for recycled asphalt was constructed. P R1 , P R2 , P R3 Performance matrix of aged asphalt P age Target performance matrix P T1 and the performance matrix of recycled asphalt P R1 , P R2 , P R3 The results are shown in Table 1.

[0033] Table 1 P age , P T1 , P R1 , P R2 and P R3 Performance results

[0034] Combining multi-index hybrid models and object functions Set the preset performance matrix .

[0035] Based on the above formula, the optimal solution is determined to be a compound of recycling agents A and B, with optimal weighting coefficients of 0.6 and 0.4 for recycling agents A and B, respectively. The corresponding optimal addition amounts of recycling agents A and B are 0.6% and 0.4% of the mass of aged asphalt, respectively.

[0036] At room temperature, 0.6% of regenerant A was placed in a stirring container and mechanically stirred. Then, regenerant B was added, and the stirring speed was 300±50 rpm for 3 min. Then, 0.4% of regenerant B was added at a uniform speed and stirred continuously for 5 min. After the compounding was completed, it was allowed to stand for 1 hour to obtain the targeted performance restoration regenerant.

[0037] The above-mentioned targeted performance-restoring rejuvenator was mixed with aged asphalt to obtain recycled asphalt mixture, and its performance was tested to obtain the performance matrix of the compounded recycled asphalt mixture, denoted as . P M1 The results are shown in Table 2.

[0038] Table 2 P T1 and P M1 Performance results

[0039] As shown in Table 2, all performance indicators of the recycled asphalt met the target performance matrix. P T1 The performance indicators achieved 100% recovery of the properties of aged asphalt.

[0040] Example 3

[0041] This embodiment provides a compounding scheme for a targeted performance-restoring regenerant based on Embodiment 1.

[0042] Aged asphalt was extracted from RAP (Rich Asphalt Acrylic Acid) recovered from a highway using the Absen extraction method. The extraction process strictly followed the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The extracted aged asphalt underwent physical and chemical property tests, and a performance matrix of the aged asphalt was obtained. P age The target RAP incorporation rate is 40% of the total mixture mass. At higher incorporation rates, low-temperature crack resistance and durability should be prioritized. Target performance matrix of recycled asphalt. P TFollowing the new asphalt standards, three recycling agents, A, B, and C, were selected and mixed with aged asphalt at a predetermined dosage of 2% to prepare recycled asphalt. Their properties were then tested, and a performance matrix for recycled asphalt was constructed. P R4 , P R5 , P R6 Performance matrix of aged asphalt P age Target performance matrix P T2 and the performance matrix of recycled asphalt P R4 , P R5 , P R6 The results are shown in Table 3.

[0043] Table 3 P age , P T2 , P R4 , P R5 and P R6 Performance results

[0044] Combining multi-index hybrid models and object functions Set the preset performance matrix .

[0045] Based on the above formula, the optimal solution is determined to be a compound of recycling agents D, E and F, with optimal weighting coefficients of 0.35, 0.3 and 0.35 for recycling agents D, E and F respectively. The optimal addition amounts of recycling agents D, E and F are 0.7%, 0.6% and 0.7% of the mass of aged asphalt, respectively, and the total addition amount is 2% of the mass of aged asphalt.

[0046] Under constant temperature of 60℃, 0.7% of regenerant D, 0.6% of regenerant E and 0.7% of regenerant F were added to a mixing container and mechanically stirred at a speed of 500 rpm. The stirring time after each regenerant was added was 3 min. After all the regenerants were added, the stirring was continued for 10 min. After the compounding was completed, it was allowed to stand for 1 hour to obtain the targeted performance restoration regenerant.

[0047] The above-mentioned targeted performance-restoring rejuvenator was mixed with aged asphalt to obtain recycled asphalt mixture, and its performance was tested to obtain the performance matrix of the compounded recycled asphalt mixture, denoted as . PM2 The results are shown in Table 4.

[0048] Table 4 P T2 and P M2 Performance results

[0049] As shown in Table 4, all performance indicators of the recycled asphalt met the target performance matrix. P T2 The performance indicators achieved 100% recovery of the properties of aged asphalt.

[0050] Example 4

[0051] This embodiment provides a compounding scheme for a targeted performance-restoring regenerant based on Embodiment 1.

[0052] Aged asphalt was extracted from RAP (Rich Asphalt Acrylic Acid) recovered from a highway using the Absen extraction method. The extraction process strictly followed the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The extracted aged asphalt underwent physical and chemical property tests, and a performance matrix of the aged asphalt was obtained. P age The target incorporation amount of RAP is 60% of the total mixture mass. At this high incorporation, aged asphalt dominates in the recycled mixture, and its penetration and ductility are its core weaknesses. Therefore, flexibility and low-temperature crack resistance should be given priority. Target performance matrix of recycled asphalt. P T Following the new asphalt standards, three recycling agents, A, B, and C, were selected and mixed with aged asphalt at a predetermined dosage of 3% to prepare recycled asphalt. Their properties were then tested, and a performance matrix for recycled asphalt was constructed. P R7 , P R8 , P R9 Performance matrix of aged asphalt P age Target performance matrix P T3 and the performance matrix of recycled asphalt P R7 , P R8 , P R9 The results are shown in Table 5.

[0053] Table 5 P age , P T3 , P R7, P R8 and P R9 Performance results

[0054] Combining multi-index hybrid models and object functions Set the preset performance matrix .

[0055] Based on the above formula, the optimal solution is determined to be a compound of recycling agents D, E and F, with optimal weighting coefficients of 0.4, 0.36 and 0.23 for recycling agents D, E and F respectively. The optimal addition amounts of recycling agents D, E and F are 1.2%, 1.1% and 0.7% of the mass of aged asphalt, respectively, and the total addition amount is 3% of the mass of aged asphalt.

[0056] Under constant temperature of 60℃, 1.2% of regenerant D, 1.1% of regenerant E and 0.7% of regenerant F were added to a stirring container and mechanically stirred at a speed of 600 rpm. The stirring time after each regenerant was added was 4 min. After all the regenerants were added, the stirring was continued for 15 min. After the compounding was completed, the mixture was allowed to stand for 2 hours to obtain a targeted performance recovery regenerant.

[0057] The above-mentioned targeted performance-restoring rejuvenator was mixed with aged asphalt to obtain recycled asphalt mixture, and its performance was tested to obtain the performance matrix of the compounded recycled asphalt mixture, denoted as . P M3 The results are shown in Table 6.

[0058] Table 6 P T3 and P M3 Performance Results

[0059] As shown in Table 6, all performance indicators of the recycled asphalt met the target performance matrix. P T3 The performance indicators achieved 100% recovery of the properties of aged asphalt. The results of this embodiment demonstrate that even with a high RAP incorporation content of 60%, the method provided by this invention, through precise selection of functional rejuvenators and quantitative calculation of multi-index mixing models, can still produce highly efficient composite rejuvenators.

[0060] In summary, as the RAP content increases, the proportion of aged asphalt increases, leading to a more severe aging of the recycled asphalt. By adjusting the focus of the target performance and selecting different dosages and types of recycling agents, the recycling needs of different aged asphalts can be systematically addressed, ultimately obtaining recycled asphalt that meets the requirements of actual engineering projects.

[0061] Example 5

[0062] Based on the above embodiments, this embodiment provides a targeted performance-restoring regenerant compounding system. This system is used to execute the targeted performance-restoring regenerant compounding method in the above method embodiments, including: The aging asphalt performance matrix construction module is used to obtain the performance characterization parameters of aging asphalt in old asphalt pavement materials and construct the aging asphalt performance matrix. The target performance matrix construction module for recycled asphalt is used to construct the target performance matrix of recycled asphalt based on the target admixture amount of old asphalt pavement materials. The recycled asphalt performance matrix construction module is used to determine candidate recycling agents based on the aged asphalt performance matrix, and to construct the recycled asphalt performance matrix based on the performance characterization results of recycled asphalt prepared by mixing the candidate recycling agents with aged asphalt at a preset dosage. The scheme determination module is used to construct a multi-index hybrid model and object function based on the performance matrix of aged asphalt, the target performance matrix and the performance matrix of recycled asphalt, and to determine the target rejuvenator and its optimal compounding weight coefficient, so as to obtain the compounding scheme of the targeted performance recovery rejuvenator.

[0063] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] This invention is described with reference to flowchart illustrations of methods and systems according to embodiments of the invention. It should be understood that each step in the flowchart, and combinations of steps in the flowchart, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing device, generate instructions for implementing the steps in the flowchart. Figure 1 A device for a function specified in one or more processes.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for compounding a targeted performance-restoring regenerant, characterized in that, include: Obtain the performance characterization parameters of aged asphalt in old asphalt pavement materials and construct the performance matrix of aged asphalt; Based on the target incorporation amount of old asphalt pavement materials, construct the target performance matrix of recycled asphalt; Candidate recycling agents are determined based on the performance matrix of aged asphalt. Based on the performance characterization parameters of recycled asphalt prepared by mixing the candidate recycling agents with aged asphalt at a preset dosage, a performance matrix of recycled asphalt is constructed. Based on the performance matrix of aged asphalt, the target performance matrix, and the performance matrix of recycled asphalt, a multi-index hybrid model and object function are constructed, and the target rejuvenator and its optimal compounding weight coefficient are determined to obtain the compounding scheme of the targeted performance recovery rejuvenator.

2. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The properties involved in the aged asphalt performance matrix, the target performance matrix, and the recycled asphalt performance matrix include at least three of the following: penetration, softening point, ductility, PG grading index, and the proportion of the four components.

3. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The target performance matrix is ​​determined based on the target incorporation amount of the old asphalt pavement material: If the target admixture content of old asphalt pavement material accounts for less than 30% of the mass of recycled asphalt mixture, then the target performance matrix of recycled asphalt adopts the new asphalt standard required by the target project. If the target admixture amount of old asphalt pavement material is less than 30% and accounts for less than 50% of the mass of recycled asphalt mixture, then the target performance matrix of recycled asphalt is based on the asphalt standard required by the target project, ensuring that the target value of ductility at 10℃ is ≥20 cm and the PG high temperature grade is 70~76. If the target admixture content of old asphalt pavement material accounts for more than 50% of the mass of recycled asphalt mixture, then the target performance matrix of recycled asphalt is based on the asphalt standard required by the target project, ensuring that the target value of ductility at 10℃ is ≥20 cm, the improvement level of PG low temperature grade is ≥1, and the PG high temperature grade is 76~82.

4. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The candidate regenerators include at least two of the following: aromatic hydrocarbon oil regenerators, cycloalkane oil regenerators, vegetable oil-based regenerators, or polymer-modified regenerators.

5. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The preset dosage is a preset percentage of the mass of each candidate recycling agent relative to the mass of the aged asphalt, and the preset dosage is 0.5% to 5%.

6. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The performance matrix of aged asphalt P age The expression is: ； in, j The number of performance characterization parameters for aged asphalt. P a1 , P a2 , P a3 , P aj The aged asphalt is the first 1 , 2 , 3 , j A type of performance characterization parameter.

7. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The target performance matrix of recycled asphalt P T The expression is: ； in, k Number of target performance parameters for recycled asphalt ，P t1 、P t2 、P t3 、P tk They are respectively the recycled asphalt 1 , 2 , 3 , k Target performance parameters.

8. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The performance matrix of recycled asphalt P Ri The expression is: ； in, h The number of performance characterization parameters for recycled asphalt. P r1 、P r2 、P r3 、P rh These are the first batches of recycled asphalt. 1 , 2 , 3 , h A type of performance characterization parameter.

9. The method for compounding a targeted performance-restoring regenerant according to claim 1, characterized in that, The process of determining the target regenerant and its optimal compounding weight coefficient to obtain a compounding scheme for the targeted performance-restoring regenerant includes: Establish a multi-indicator hybrid model P S The expression is: ； in, n The number of candidate regenerants. i Candidate regenerant types, V i For the first i The compounding weighting coefficients of the candidate regenerants, P Ri The performance matrix of recycled asphalt; by The target regenerant and its optimal compound weight coefficients are obtained by solving for the object function. The optimal dosage of the target regenerant is calculated based on the optimal compounding weight coefficient. M v : ； in, v For the target regenerant type, the optimal dosage of the target regenerant. M v For the first v The percentage of the target rejuvenator by mass relative to the mass of aged asphalt. W v For the first v The preset dosage of the candidate regenerant.

10. A targeted performance-restoring regenerant compounding system, characterized in that, include: The aging asphalt performance matrix construction module is used to obtain the performance characterization parameters of aging asphalt in old asphalt pavement materials and construct the aging asphalt performance matrix. The target performance matrix construction module for recycled asphalt is used to construct the target performance matrix of recycled asphalt based on the target admixture amount of old asphalt pavement materials. The recycled asphalt performance matrix construction module is used to determine candidate recycling agents based on the aged asphalt performance matrix, and to construct the recycled asphalt performance matrix based on the performance characterization results of recycled asphalt prepared by mixing the candidate recycling agents with aged asphalt at a preset dosage. The scheme determination module is used to construct a multi-index hybrid model and object function based on the performance matrix of aged asphalt, the target performance matrix and the performance matrix of recycled asphalt, and to determine the target rejuvenator and its optimal compounding weight coefficient, so as to obtain the compounding scheme of the targeted performance recovery rejuvenator.

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