A method, system and equipment for designing the proportion of thermally recycled mixture

Abstract

The present invention discloses a method, system and equipment for designing the mix proportion of a hot recycled mixture. The method comprises: calculating the degree of fusion of new and old asphalt in the hot recycled mixture; using the screening results of RAP materials before and after extraction in a corresponding proportion in the process of synthesizing the gradation according to the degree of fusion of the new and old asphalt; determining the optimal asphalt-stone ratio of the hot recycled mixture; and calculating the amount of newly added asphalt based on the degree of fusion of the new and old asphalt. The present invention takes into account the degree of fusion of the new and old asphalt in the hot recycled mixture when designing the mix proportion, so that the designed gradation is close to the actual gradation of the produced hot recycled mixture, and the asphalt content in the hot recycled mixture is close to the calculated optimal asphalt-stone ratio, thereby improving the water stability and low-temperature crack resistance of the hot recycled mixture.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal regeneration mix design, and in particular to a thermal regeneration mixture mix design method, system and equipment. Background Art

[0002] When designing the hot recycling mix, according to the "Technical Specifications for Highway Asphalt Pavement Regeneration," the old asphalt in the recycled material is considered completely integrated with the new asphalt, and the design is based on the screening data of the old aggregate after RAP extraction. However, in the actual hot recycling production process, the state of the RAP recycled material lies between two extremes: completely unintegrated and completely integrated. Therefore, when designing the gradation for hot recycling, whether using the screening results before or after RAP extraction, the designed gradation will deviate to a certain extent from the actual gradation of the hot recycling product. Summary of the Invention

[0003] The purpose of the present invention is to provide a method, system and equipment for designing the mix ratio of hot recycled mixture, which can scientifically and rationally design the hot recycled gradation according to the actual fusion state of new and old asphalt in the mixture, so as to better ensure the performance of hot recycled mixture.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A method for designing a mix ratio of a thermally recycled mixture, comprising:

[0006] Calculate the degree of fusion of new and old asphalt in hot recycled mixture;

[0007] According to the degree of fusion of the new and old asphalt, the screening results of the RAP materials before and after extraction in the corresponding proportion are used in the process of synthetic grading;

[0008] Determine the optimal oil-to-stone ratio for thermally recycled mixes;

[0009] The amount of new asphalt to be added is calculated based on the degree of fusion of the new and old asphalt.

[0010] Optionally, calculate the degree of fusion between the new and old asphalt, including:

[0011] Cut the hot recycled mixture, 100% RAP hot mix asphalt mixture and 0% RAP hot mix asphalt mixture into several test blocks with smooth surfaces;

[0012] The DMT modulus of the asphalt area in the hot recycled mixture, the old asphalt in the 100% RAP hot mix asphalt mixture, and the new asphalt in the 0% RAP hot mix asphalt mixture was measured using AFM PF-QNM technology to obtain the DMT modulus of the new and old asphalt.

[0013] Calculate the DMT modulus of the recycled asphalt when the new and old asphalt are completely fused according to the asphalt content in the hot recycled mixture and the DMT modulus of the new and old asphalts;

[0014] The degree of fusion of the new and old asphalt in the hot recycled mixture is calculated based on the DMT modulus of the new and old asphalt and the DMT modulus of the recycled asphalt in the state where the new and old asphalt are completely fused.

[0015] Optionally, according to the degree of fusion of the new and old asphalt, the screening results of the RAP materials before and after extraction in a corresponding proportion are used in the process of synthetic grading, specifically including:

[0016] Screen the RAP materials before and after extraction respectively;

[0017] According to the degree of fusion of new and old asphalt and the amount of RAP material, the formula a M(i) =a v(i) ×(1-R)+a R(i) ×R×DOB+a ER(i) ×(1-DOB)×R to calculate the percentage of the residual on the sieve of the hot recycled mixture on the sieve hole i; where a M(i) is the percentage of the hot recycled mixture on the sieve hole i; a v(i) is the percentage of the residue on the sieve hole i of the new aggregate; a R(i) is the percentage of the residual on sieve hole i after the RAP old material is extracted; a ER(i) is the percentage of the residual on the sieve hole i before the old RAP material is extracted; R is the amount of RAP material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture.

[0018] Optionally, determine the optimal asphalt-to-stone ratio of the thermally recycled mixture, including:

[0019] According to the formula P b =0.035a+0.045b+Kc+F to estimate the optimal asphalt content in hot recycled mixture; where P b is the estimated optimal asphalt content in the hot recycled mixture; a is the proportion of aggregate that does not pass through the 2.36mm sieve; b is the proportion of aggregate that passes through the 2.36mm sieve and remains on the 0.075mm sieve; c is the proportion of aggregate that passes through the 0.075mm sieve; K and F are both proportional coefficients;

[0020] P b is the median, using P b 、P b ±0.5, P b The optimal asphalt-to-stone ratio was determined according to the Marshall method for the five asphalt dosage levels of ±1.0.

[0021] Optionally, the calculation formula for the amount of newly added asphalt is as follows:

[0022] P nb =P b -DOB×P ob ×R

[0023] Among them, P nb Add asphalt dosage to thermal regeneration; P b is the total asphalt content in the hot recycled mixture; P ob is the asphalt content in RAP old material; R is the amount of old material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture.

[0024] The present invention also provides a thermal regeneration mixture proportion design system, comprising:

[0025] The module for calculating the degree of fusion of new and old asphalt is used to calculate the degree of fusion of new and old asphalt in hot recycled mixture;

[0026] The corresponding proportion calculation module of the recycled mixture synthesis gradation is used to use the screening results of the RAP materials before and after extraction in the synthesis gradation process according to the degree of fusion of the new and old asphalt;

[0027] Optimal oil-stone ratio determination module, used to determine the optimal oil-stone ratio of thermally recycled mixture;

[0028] The module for calculating the amount of newly added asphalt is used to calculate the amount of newly added asphalt based on the degree of fusion of new and old asphalt in the hot recycled mixture.

[0029] Optionally, the module for calculating the degree of fusion of new and old asphalt specifically includes:

[0030] Cutting unit, used to cut the hot-mixed asphalt mixtures, 100% RAP hot-mixed asphalt mixtures and 0% RAP hot-mixed asphalt mixtures into several test blocks with smooth surfaces;

[0031] The DMT modulus test unit is used to measure the DMT modulus of the asphalt area in hot recycling, the old asphalt in 100% RAP, and the new asphalt in 0% RAP hot mix asphalt using AFM PF-QNM technology to obtain the DMT modulus of the new and old asphalt;

[0032] A DMT modulus calculation unit is used to calculate the DMT modulus of the regenerated asphalt in the state where the new and old asphalts are completely fused, based on the content of the hot-regenerated asphalt and the DMT modulus of the new and old asphalts.

[0033] The new and old asphalt fusion degree calculation unit is used to calculate the fusion degree of the new and old asphalt in the hot recycled mixture based on the DMT modulus of the new and old asphalt and the DMT modulus of the recycled asphalt in the state of complete fusion of the new and old asphalt.

[0034] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the above-mentioned method for designing a proportion of a thermally recycled mixture.

[0035] The present invention also provides a computer-readable storage medium storing a computer program, which implements the above-mentioned method for designing the proportion of thermally regenerated mixture when executed by a processor.

[0036] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0037] The present invention takes into account the degree of fusion of new and old asphalt in the hot-recycled mixture when designing the mix ratio, so that the designed gradation is close to the actual gradation of the produced hot-recycled mixture, and the asphalt amount is close to the calculated optimal oil-stone ratio, thereby improving the water stability and low-temperature crack resistance of the hot-recycled mixture; and can effectively improve the problem of decreased high-temperature performance of the asphalt pavement caused by changes in the fusion state of new and old asphalt in the early service process of the hot-recycled asphalt mixture pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Flowchart of the method for designing the mix ratio of thermally regenerated mixture provided in Example 1 of the present invention;

[0040] Figure 2 The design gradation curve diagram of the hot recycled mixture provided in the second embodiment of the present invention;

[0041] Figure 3 This is a gradation curve diagram of RAP material before and after extraction provided by Example 2 of the present invention;

[0042] Figure 4 A schematic diagram of volume parameter information for preparing thermal regeneration using a conventional mix ratio design method provided in Example 2 of the present invention;

[0043] Figure 5 A schematic diagram of thermal regeneration volume parameter information prepared using a conventional mix design method provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] The purpose of the present invention is to provide a method, system and equipment for designing the mix ratio of hot recycled mixture, which can scientifically and rationally design the hot recycled gradation according to the actual fusion state of new and old asphalt in the hot recycled mixture, so as to better ensure the performance of the hot recycled mixture.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1

[0048] The first embodiment of the present invention provides a method for designing the proportion of a thermally regenerated mixture, such as Figure 1 As shown, the method includes the following steps:

[0049] Step S1: Calculate the degree of fusion between new and old asphalt in the hot recycled mixture.

[0050] 1) Cut the hot recycled mixture, 100% RAP hot mix asphalt mixture and 0% RAP hot mix asphalt mixture into several 30mm*20mm*10mm (or 20mm*20mm*10mm) test blocks with smooth surface;

[0051] 2) Using AFM PF-QNM technology to measure the DMT modulus of the old asphalt in 100% RAP hot mix asphalt mixture, the new asphalt in 0% RAP hot mix asphalt mixture, and the asphalt area in the hot recycled mixture;

[0052] 3) Calculate the DMT modulus of the recycled asphalt in the complete state of the new and old asphalt based on the asphalt content of the hot recycled mixture and the DMT modulus of the new and old asphalt obtained by testing;

[0053] 4) Compare the DMT modulus of the asphalt in the new-old aggregate area of ​​the hot recycled mixture with the DMT modulus of the new and old asphalt in the fully fused state, and calculate the degree of fusion of the new and old asphalt in the hot recycled mixture according to the following formula:

[0054]

[0055] Where, DOB is the degree of fusion of new and old asphalt in hot recycled mixture, %; E mea is the measured DMT modulus of asphalt in the new-old aggregate region of the hot recycled mixture at 25°C, MPa; Evirgin is the DMT modulus of new asphalt at 25℃, MPa; E total It is the DMT modulus of the new and old asphalt when they are completely mixed at 25°C, MPa.

[0056] Step S2: Based on the degree of fusion of the new and old asphalt, the screening results of the RAP materials before and after extraction in a corresponding proportion are used in the process of synthetic grading.

[0057] 1) Screening the RAP material before and after extraction respectively;

[0058] 2) According to the degree of fusion of new and old asphalt and the amount of RAP material, the percentage of the hot recycled mixture on the sieve hole i is calculated as follows:

[0059] a M(i) =a v(i) ×(1-R)+a R(i) ×R×DOB+a ER(i) ×(1-DOB)×R

[0060] Where a M(i) is the percentage of the hot recycled mixture on the sieve hole i, %; a v(i) is the percentage of the residue on the sieve hole i of the new aggregate, %; a R(i) is the percentage of the residue on sieve hole i after the RAP old material is extracted, %; a ER(i) is the percentage of the residual on the sieve hole i before the old RAP material is extracted, %; R is the amount of RAP material in the hot recycled mixture, %; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture, %.

[0061] Step S3: Determine the optimal oil-stone ratio of the thermally recycled mixture.

[0062] The optimal asphalt content in hot recycled mixture can be estimated by the following formula:

[0063] P b =0.035a+0.045b+Kc+F

[0064] Among them, P b is the estimated optimal asphalt content in the hot recycled mixture; when the pass rate of 0.075mm sieve is 6% to 10%, K is 0.18; when the pass rate of 0.075mm sieve is equal to or less than 5%, K is 0.20; a is the proportion of aggregate that does not pass through the 2.36mm sieve; b is the proportion of aggregate that passes through the 2.36mm sieve and remains on the 0.075mm sieve; c is the proportion of mineral material that passes through the 0.075mm sieve; F is 0 to 2.0, depending on the water absorption rate of the aggregate. In the absence of data, 0.7 is used.

[0065] Pb is the median, using P b 、P b ±0.5, P b The optimal asphalt-to-stone ratio was determined according to the Marshall method for the five asphalt dosage levels of ±1.0.

[0066] Step S4: Calculate the amount of new asphalt based on the degree of fusion between the new and old asphalt.

[0067] The amount of new asphalt added in thermal regeneration is calculated as follows:

[0068] P nb =P b -DOB×P ob ×R

[0069] Where, P nb is the amount of new asphalt added to the hot recycled mixture, %; P b is the total asphalt content in the hot recycled mixture, %; P ob is the asphalt content in RAP old material, %; R is the amount of old material in the hot recycled mixture, %; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture, %.

[0070] By adopting the above scheme, the beneficial effects of the present invention are:

[0071] The method of the present invention can take into account the degree of fusion of new and old asphalt in the hot recycled mixture when designing the mix ratio, so that the designed gradation is close to the actual gradation of the produced hot recycled mixture, and the asphalt amount is close to the calculated optimal oil-stone ratio, thereby improving the water stability and low-temperature crack resistance of the hot recycled mixture.

[0072] Example 2

[0073] In order to execute the method corresponding to the above-mentioned embodiment 1, this embodiment 2 provides a specific example.

[0074] The recycled asphalt mixture was prepared by using 70# matrix asphalt, limestone and laboratory aged RAP material. The target gradation was AC-20 and the RAP material content was 40%. The designed gradation curve is shown in the figure below. Figure 2 As shown. The screening curve of RAP old material before and after extraction is as follows Figure 3 shown.

[0075] Conventional mix design methods:

[0076] The addition of each grade of new and old aggregates is calculated according to the conventional mix design method, and the results are shown in Table 1 below.

[0077] Table 1 Addition of new and old aggregates

[0078]

[0079] Marshall test specimens were first tested using five different oil-stone ratios (3.0%, 3.5%, 4.0%, 4.5%, and 5.0%). Stability was determined using these specimens, and the bulk density, void fraction, and VFA were calculated. Figure 4 The thermal regeneration volume parameter information prepared by conventional mix design method is given.

[0080] from Figure 4 For the hot recycled mixture prepared using conventional mix design, a1 = 4.4, a2 = 4.1, a3 = 4.18, and a4 = 3.86, resulting in OAC1 = 4.19% and OAC2 = 4.00%. The average value of OAC1 and OAC2 is 4.10%, resulting in a calculated proportion of new asphalt in the mixture of 2.46%.

[0081] Hot recycling mix design method considering the degree of fusion between new and old asphalt:

[0082] (1) Quantify the degree of fusion of new and old asphalt in hot recycled mixtures.

[0083] The DMT modulus of asphalt in the hot recycled mixture was tested in situ using atomic force microscopy technology, and the degree of fusion of new and old asphalt in the mixture was quantified to be approximately 68.7%.

[0084] (2) According to the degree of fusion of new and old asphalt in hot regeneration, the screening results of RAP materials before and after extraction with corresponding proportions are used in the process of synthetic grading.

[0085] When designing the gradation, the screening results after RAP waste material extraction showed a 27.5% waste material content, while the screening results before RAP waste material extraction showed a 12.5% ​​waste material content. The design adhered to the principle of keeping as close to the target gradation as possible, and the calculated proportions of each grade are shown in Table 2.

[0086] Table 2 Addition of new and old aggregates

[0087]

[0088] (3) Determine the optimal oil-stone ratio of the thermally recycled mixture.

[0089] Marshall test specimens were tested using five different oil-stone ratios (3.0%, 3.5%, 4.0%, 4.5%, and 5.0%). The stability of the specimens was determined and the bulk density, void fraction, and VFA were calculated using the specimens formed at different oil-stone ratios. Figure 5 The prepared thermal regeneration volume parameter information is given.

[0090] from Figure 5It can be seen that for the hot recycled mixture prepared by the optimized mix design method, a1=4.32, a2=4.09, a3=4.19, a4=3.70, then OAC1=4.07%, OAC2=3.68%; the average value of OAC1 and OAC2 is 3.87%.

[0091] (4) Calculate the amount of new asphalt to be added by considering the degree of fusion of new and old asphalt during thermal regeneration.

[0092] The amount of new asphalt added to the hot recycled mixture is calculated as follows. The calculated proportion of new asphalt added to the mixture is 2.74%.

[0093] P nb =P b -DOB×P ob ×R

[0094] Where, P nb is the amount of new asphalt added to the hot recycled mixture, %; P b is the total asphalt content in the hot recycled mixture, %; P ob is the asphalt content in RAP old material, %; R is the amount of old material in the hot recycled mixture, %; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture, %.

[0095] The thermally recycled mixture was prepared according to the specified synthetic gradation and the calculated optimal oil-stone ratio. The performance of the mixtures obtained by the two design methods was compared. The results are shown in Table 3.

[0096] Table 3 Comparison of properties of mixtures prepared by two design methods

[0097]

[0098] As shown in Table 3, incorporating the actual fusion state of new and old asphalt into mix design can effectively improve the low-temperature crack resistance and water stability of the hot-recycled mixture. Even if the high-temperature performance of the hot-recycled mix is ​​reduced, high-temperature performance is not the key to evaluating its road performance for hot recycling. Therefore, in future hot-recycled mixture mix designs, the present invention can be used to incorporate the actual fusion state of new and old asphalt into the mix design process to improve the low-temperature performance and water stability of the hot-recycled mixture.

[0099] Example 3

[0100] In order to execute the corresponding method of the above-mentioned embodiment 1 and realize the corresponding functions and technical effects, a thermal regeneration mixture proportion design system is provided below.

[0101] The system includes:

[0102] The module for calculating the degree of fusion of new and old asphalt is used to calculate the degree of fusion of new and old asphalt in hot recycled mixture.

[0103] The corresponding proportion calculation module for the synthetic gradation of the recycled mixture is used to use the screening results of the RAP materials before and after the extraction in the process of synthetic gradation according to the degree of fusion of the new and old asphalt.

[0104] The optimal oil-stone ratio determination module is used to determine the optimal oil-stone ratio of thermally recycled mixture.

[0105] The module for calculating the amount of newly added asphalt is used to calculate the amount of newly added asphalt based on the degree of fusion of new and old asphalt in the hot recycled mixture.

[0106] The newly added asphalt usage calculation module specifically includes:

[0107] Cutting unit, used to cut the hot-mixed asphalt mixtures, 100% RAP hot-mixed asphalt mixtures and 0% RAP hot-mixed asphalt mixtures into several test blocks with smooth surfaces;

[0108] The DMT modulus test unit is used to measure the DMT modulus of the asphalt area in hot recycling, the old asphalt in 100% RAP, and the new asphalt in 0% RAP hot mix asphalt using AFM PF-QNM technology to obtain the DMT modulus of the new and old asphalt;

[0109] A DMT modulus calculation unit is used to calculate the DMT modulus of the regenerated asphalt in the state where the new and old asphalts are completely fused, based on the content of the hot-regenerated asphalt and the DMT modulus of the new and old asphalts.

[0110] The new and old asphalt fusion degree calculation unit is used to calculate the fusion degree of the new and old asphalt in the hot recycled mixture based on the DMT modulus of the new and old asphalt and the DMT modulus of the recycled asphalt in the state of complete fusion of the new and old asphalt.

[0111] Example 4

[0112] The fourth embodiment of the present invention provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the method for designing the proportion of the hot recycled mixture of the first embodiment.

[0113] The electronic device mentioned above may be a server.

[0114] Example 5

[0115] The fifth embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for designing the proportion of the thermally regenerated mixture of the first embodiment.

[0116] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0117] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for designing the proportion of a thermally regenerated mixture, characterized in that: include: Calculating the degree of fusion of new and old asphalt in the hot recycled mixture; specifically comprising: cutting the mixed and formed hot recycled mixture, 100% RAP hot mix asphalt mixture and 0% RAP hot mix asphalt mixture into several test blocks with smooth surfaces; using AFMPF-QNM technology to test the DMT modulus of the asphalt area in the hot recycled mixture, the old asphalt in the 100% RAP hot mix asphalt mixture, and the new asphalt in the 0% RAP hot mix asphalt mixture to obtain the DMT modulus of the new and old asphalt; calculating the DMT modulus of the recycled asphalt in a state where the new and old asphalt are completely fused based on the asphalt content in the hot recycled mixture and the DMT modulus of the new and old asphalt; calculating the degree of fusion of new and old asphalt in the hot recycled mixture based on the DMT modulus of the new and old asphalt and the DMT modulus of the recycled asphalt in a state where the new and old asphalt are completely fused; According to the degree of fusion of the new and old asphalt, the screening results of the RAP materials before and after extraction in the corresponding proportion are used in the process of synthetic grading; specifically, the RAP materials before and after extraction are screened respectively; according to the degree of fusion of the new and old asphalt and the amount of RAP material, the formula a is used to calculate the gradation of the RAP materials. M(i) =a v(i) ×(1-R)+a R(i) ×R×DOB+a ER(i) ×(1-DOB)×R to calculate the percentage of the residual on the sieve of the hot recycled mixture on the sieve hole i; where a M(i) is the percentage of the hot recycled mixture on the sieve hole i; a v(i) is the percentage of the residue on the sieve hole i of the new aggregate; a R(i) is the percentage of the residual on sieve hole i after the RAP old material is extracted; a ER(i) is the percentage of the residual on the sieve hole i before the old RAP material is extracted; R is the amount of RAP material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture; Determine the optimal oil-to-stone ratio for thermally recycled mixes; Calculate the amount of new asphalt based on the degree of fusion between the new and old asphalt; The calculation formula for the amount of newly added asphalt is as follows: P nb =P b -DOB×P ob ×R Among them, P nb Add asphalt dosage to thermal regeneration; P b is the total asphalt content in the hot recycled mixture; P ob is the asphalt content in RAP old material; R is the amount of old material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture.

2. The method for designing the proportion of thermally regenerated mixture according to claim 1, characterized in that: Determine the optimal asphalt-stone ratio for thermally recycled mixtures, including: According to the formula P b =0.035a+0.045b+Kc+F estimates the optimal asphalt content in the hot recycled mixture; where Pb is the estimated optimal asphalt content in the hot recycled mixture; a is the proportion of aggregate that does not pass through the 2.36mm sieve; b is the proportion of aggregate that passes through the 2.36mm sieve and remains on the 0.075mm sieve; c is the proportion of aggregate that passes through the 0.075mm sieve; K and F are both proportional coefficients; P b is the median, using P b 、P b ±0.5, P b The optimal asphalt-to-stone ratio was determined according to the Marshall method for the five asphalt dosage levels of ±1.

0.

3. A thermal regeneration mixture proportion design system, characterized in that: include: A module for calculating the degree of fusion of new and old asphalt is used to calculate the degree of fusion of new and old asphalt in hot-recycled mixtures; specifically comprising: a cutting unit for cutting the hot-recycled, 100% RAP hot-recycled and 0% RAP hot-mix asphalt mixtures into several test blocks with smooth surfaces; a DMT modulus testing unit for testing the DMT modulus of the asphalt area in hot-recycled, the old asphalt in 100% RAP and the new asphalt in the 0% RAP hot-mix asphalt mixture using AFM PF-QNM technology to obtain the DMT modulus of the new and old asphalt; a DMT modulus calculation unit for calculating the DMT modulus of the recycled asphalt in the state of complete fusion of the new and old asphalt according to the content of the hot-recycled asphalt and the DMT modulus of the new and old asphalt; a unit for calculating the degree of fusion of new and old asphalt in the hot-recycled mixture according to the DMT modulus of the new and old asphalt and the DMT modulus of the recycled asphalt in the state of complete fusion of the new and old asphalt; The corresponding proportion calculation module of the synthetic gradation of the recycled mixture is used to use the screening results of the RAP materials before and after extraction in the synthetic gradation process according to the degree of fusion of the new and old asphalt; specifically, it includes: screening the RAP materials before and after extraction respectively; according to the degree of fusion of the new and old asphalt and the amount of RAP materials, the formula a is used to calculate the RAP materials before and after extraction. M(i) =a v(i) ×(1-R)+a R(i) ×R×DOB+a ER(i) ×(1-DOB)×R to calculate the percentage of the residual on the sieve of the hot recycled mixture on the sieve hole i; where a M(i) is the percentage of the hot recycled mixture on the sieve hole i; a v(i) is the percentage of the residue on the sieve hole i of the new aggregate; a R(i) is the percentage of the residual on sieve hole i after the RAP old material is extracted; a ER(i) is the percentage of the residual on the sieve hole i before the old RAP material is extracted; R is the amount of RAP material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture; Optimal oil-stone ratio determination module, used to determine the optimal oil-stone ratio of thermally recycled mixture; A module for calculating the amount of newly added asphalt is used to calculate the amount of newly added asphalt based on the degree of fusion of new and old asphalt in the hot recycled mixture; The calculation formula for the amount of newly added asphalt is as follows: P nb =P b -DOB×P ob ×R Among them, P nb Add asphalt dosage to thermal regeneration; P b is the total asphalt content in the hot recycled mixture; P ob is the asphalt content in RAP old material; R is the amount of old material in the hot recycled mixture; DOB is the degree of fusion of new and old asphalt in the hot recycled mixture.

4. An electronic device, characterized in that: It includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the hot recycled mixture proportion design method according to any one of claims 1-2.

5. A computer-readable storage medium, characterized in that It stores a computer program, which, when executed by a processor, implements the hot recycled mixture proportion design method as described in any one of claims 1-2.

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