Method and device for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy

Abstract

The present application discloses a method for evaluating the interfacial adhesion performance of asphalt and filler based on atomic force microscopy, which belongs to the technical field of material performance evaluation. The method includes: obtaining a curve of the distance of the field point-adhesion interface of the asphalt mortar and the DMT modulus, dividing the curve into a first section curve, a second section curve and a third section curve according to the size of the slope, the absolute value of the slope of the second section curve is greater than or equal to the first threshold, the absolute value of the slope of the third section curve is less than the second threshold and greater than or equal to the third threshold; the absolute value of the first threshold is greater than the absolute value of the second threshold, the absolute value of the second threshold is greater than the absolute value of the third threshold, the second section curve is used as the transition area curve, and the third section curve is used as the free asphalt area curve; based on the transition area curve and the free asphalt area curve, the critical DMT modulus of the asphalt mortar is determined, and the interfacial adhesion performance of the asphalt and the filler is evaluated. This method improves the accuracy and reliability of material adhesion performance detection.

Description

Technical Field

[0001] The present application belongs to the technical field of material performance evaluation, and in particular relates to a method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy. Background Art

[0002] With the continuous development of my country's transportation infrastructure, the construction of long-life roads has become an important goal. The quality of asphalt mixtures, especially the performance of asphalt mortar, directly affects the life of the pavement. Asphalt mortar is composed of asphalt and filler. The adhesion performance of the interface between the two is crucial to the overall performance. The interfacial adhesion performance of asphalt and filler is of great significance to improving the quality of asphalt pavement and extending its service life.

[0003] At present, the research methods of the interfacial adhesion performance between asphalt and filler mainly include surface physical and chemical methods, dynamic mechanical analysis methods and micro-nano characterization technology. The surface physical and chemical method can quantify the interfacial adhesion behavior by measuring the surface energy of asphalt and filler and calculating the interfacial adhesion work. The dynamic mechanical analysis method evaluates the influence of fillers on rheological properties by measuring the rheological properties of asphalt mortar, such as complex shear modulus. Micro-nano characterization technologies, such as scanning electron microscopy and atomic force microscopy, can directly observe the interfacial structure between asphalt and filler. At the same time, component analysis technologies such as infrared spectroscopy can also provide detailed data support.

[0004] Although the existing technology has achieved certain results in the study of interface adhesion performance, it still has some limitations, such as low accuracy and low efficiency in detecting the interface adhesion performance between asphalt and filler. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an atomic force microscope-based method for evaluating the interfacial adhesion performance of asphalt and filler, which improves the accuracy and reliability of material adhesion performance detection.

[0006] In a first aspect, the present application provides a method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy, the method comprising:

[0007] Obtaining a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus, wherein the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus is obtained by scanning the force curve of the asphalt mortar using an atomic force microscope, wherein the asphalt mortar includes asphalt and filler;

[0008] Based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, the curve is divided into a first curve section, a second curve section and a third curve section according to the size of the slope, wherein the absolute value of the slope of the first curve section is less than the first threshold value and greater than or equal to the second threshold value, the absolute value of the slope of the second curve section is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve section is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, the first curve section is taken as the structural asphalt area curve, the second curve section is taken as the transition area curve, and the third curve section is taken as the free asphalt area curve;

[0009] Determining a critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve;

[0010] Based on the critical DMT modulus of the asphalt mortar, the interfacial adhesion performance between the asphalt and the filler was evaluated.

[0011] According to one embodiment of the present application, the method of obtaining a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus includes:

[0012] Evenly apply the asphalt mortar on the glass sheet by dipping a tool, and place the glass sheet flat in a sealed container after drying;

[0013] Performing force curve scanning on the nanoscopic surface of the asphalt mortar through the atomic force microscope to obtain scanning data;

[0014] The scanning data is preprocessed to obtain a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus.

[0015] According to one embodiment of the present application, determining the critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve includes:

[0016] A tangent line is drawn based on the midpoint of the transition region curve. The tangent line expression of the midpoint of the transition region curve is as follows:

[0017]

[0018] in, represents the tangent dependent variable at the midpoint of the transition region curve, a represents the tangent slope at the midpoint of the transition region curve, x represents the tangent independent variable at the midpoint of the transition region curve, and b represents the tangent intercept at the midpoint of the transition region curve;

[0019] Based on the midpoint of the free asphalt area curve, a tangent line is drawn. The tangent line expression of the midpoint of the free asphalt area curve is as follows:

[0020]

[0021] in, represents the tangent dependent variable of the midpoint of the free asphalt area curve, c represents the tangent slope of the midpoint of the free asphalt area curve, x represents the tangent independent variable of the midpoint of the free asphalt area curve, and d represents the tangent intercept of the midpoint of the free asphalt area curve;

[0022] The critical DMT modulus of the asphalt mortar is determined based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve.

[0023] According to one embodiment of the present application, the critical DMT modulus of the asphalt mortar is determined based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve, including:

[0024] Determine the intersection of the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve based on the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve;

[0025] The critical DMT modulus of the asphalt mortar is determined based on the ordinate of the intersection of the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve.

[0026] According to one embodiment of the present application, the evaluation of the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar includes:

[0027] Based on the critical DMT modulus and interface adhesion performance parameters of the asphalt mortar, a correlation regression equation is constructed;

[0028] Based on the correlation regression equation, when the critical DMT modulus of the asphalt mortar is greater than 0 and less than a first preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a weak grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the first preset threshold and less than a second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a medium grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a strong grade;

[0029] The interfacial adhesion performance between the asphalt and the filler is divided into weak, medium and strong grades.

[0030] According to one embodiment of the present application, the calculation formula of the interface adhesion performance parameter is as follows:

[0031] ;

[0032] in, represents the complex modulus of asphalt mortar, represents the complex modulus of asphalt, represents the filler volume fraction, and C represents the interface adhesion performance parameter.

[0033] In a second aspect, the present application provides an apparatus for evaluating the interfacial adhesion performance of asphalt and filler based on an atomic force microscope, the apparatus comprising:

[0034] An acquisition module, used for acquiring a curve of a distance between a field point and an adhesion interface of asphalt mortar and a DMT modulus, wherein the curve of a distance between a field point and an adhesion interface of asphalt mortar and a DMT modulus is obtained by scanning a force curve of the asphalt mortar using an atomic force microscope, wherein the asphalt mortar includes asphalt and a filler;

[0035] A processing module, for dividing the curve into a first curve segment, a second curve segment and a third curve segment according to the size of the slope based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, wherein the absolute value of the slope of the first curve segment is less than a first threshold value and greater than or equal to a second threshold value, the absolute value of the slope of the second curve segment is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve segment is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, and the first curve segment is used as a structural asphalt area curve, the second curve segment is used as a transition area curve, and the third curve segment is used as a free asphalt area curve;

[0036] A determination module, for determining a critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve;

[0037] An evaluation module is used to evaluate the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar.

[0038] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy as described in the first aspect above is implemented.

[0039] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy as described in the first aspect above.

[0040] In a fifth aspect, the present application provides a chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy as described in the first aspect.

[0041] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy as described in the first aspect above.

[0042] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application.

[0043] The present invention provides an atomic force microscope-based method for evaluating the interfacial adhesion performance between asphalt and filler, which has the following beneficial effects compared with the prior art:

[0044] (1) The present invention obtains a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus, and divides the asphalt mortar into a structural asphalt region, a transition region and a free asphalt region based on the curve. The interfacial adhesion performance between asphalt and filler can be quickly analyzed, and the mechanical information of the adhesion interface influence area is collected by atomic force microscopy to further determine the critical DMT modulus of the asphalt mortar. The interfacial adhesion performance between asphalt and filler can be effectively characterized and evaluated, and the accuracy and reliability of the interfacial adhesion performance evaluation are improved. It has guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance between asphalt and filler and screening strong adhesion fillers.

[0045] (2) The present invention evenly applies asphalt mortar on a glass sheet, uses an atomic force microscope to perform a force curve scan on its nanoscale surface, and then obtains a curve of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar. By preprocessing the scanning data, it can intuitively reflect the change of the DMT modulus in the adhesion interface influence area in the asphalt mortar, reveal the influence of the interfacial adhesion performance of asphalt and filler on the micromechanical properties of the asphalt mortar, and has guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance of asphalt and filler and screening strong adhesion fillers.

[0046] (3) The present invention can obtain the critical DMT modulus of asphalt mortar by analyzing the tangent line of the midpoint of the transition region and the free asphalt region curve. By calculating the slope and intercept of the tangent line of the midpoint, the mechanical response characteristics of asphalt mortar in different stress regions can be captured in detail. This can be used to screen highly adhesive fillers, guide actual engineering projects, and provide data support for the proportion design of asphalt materials, which is helpful to improve the durability and stability of asphalt mixtures, thereby improving the long-term benefits of road construction and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0048] Figure 1 It is a schematic flow chart of a method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy provided in an embodiment of the present application;

[0049] Figure 2 It is one of the schematic diagrams of the curve of the distance between the field point and the adhesion interface and the DMT modulus of the asphalt mortar provided in the embodiment of the present application;

[0050] Figure 3 This is a second schematic diagram of a curve of the distance between the field point and the adhesion interface and the DMT modulus of the asphalt mortar provided in the embodiment of the present application;

[0051] Figure 4 This is a third schematic diagram of a curve of the distance between the field point and the adhesion interface and the DMT modulus of the asphalt mortar provided in the embodiment of the present application;

[0052] Figure 5 This is a fourth schematic diagram of a curve of the distance between the field point and the adhesion interface and the DMT modulus of the asphalt mortar provided in the embodiment of the present application;

[0053] Figure 6 Schematic diagram 5 of the curve of the distance between the field point and the adhesion interface and the DMT modulus of the asphalt mortar provided in the embodiment of the present application;

[0054] Figure 7 It is a schematic structural diagram of an apparatus for evaluating the interfacial adhesion performance between asphalt and filler based on an atomic force microscope provided in an embodiment of the present application;

[0055] Figure 8 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0057] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0058] In combination with the accompanying drawings, the interface adhesion performance evaluation method of asphalt and filler based on atomic force microscopy, the interface adhesion performance evaluation device of asphalt and filler based on atomic force microscopy, the electronic device and the readable storage medium provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0059] Among them, the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy can be applied to the terminal, and can be specifically executed by hardware or software in the terminal.

[0060] The terminal includes, but is not limited to, a portable communication device such as a mobile phone or a tablet computer having a touch-sensitive surface (e.g., a touch screen display and / or a touch pad). It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer having a touch-sensitive surface (e.g., a touch screen display and / or a touch pad).

[0061] In the following various embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse and a joystick.

[0062] The embodiment of the present application provides an atomic force microscope-based method for evaluating the interface adhesion performance of asphalt and filler. The execution subject of the atomic force microscope-based method for evaluating the interface adhesion performance of asphalt and filler can be an electronic device or a functional module or functional entity in the electronic device that can implement the atomic force microscope-based method for evaluating the interface adhesion performance of asphalt and filler. The electronic devices mentioned in the embodiment of the present application include but are not limited to mobile phones, tablet computers, computers, cameras, and wearable devices. The method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy provided in the embodiment of the present application is described below using an electronic device as an example of the execution subject.

[0063] Figure 1 is a flow chart of a method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy provided in an embodiment of the present application, such as Figure 1 As shown, the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy includes: step 110, step 120, step 130 and step 140.

[0064] Step 110, obtaining a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus, wherein the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus is obtained by scanning the force curve of the asphalt mortar using an atomic force microscope, and the asphalt mortar includes asphalt and filler;

[0065] It is easy to understand that asphalt mortar includes asphalt and filler. When preparing asphalt mortar samples, the asphalt can be 70# ordinary asphalt, and the filler can be mineral powder, slaked lime, cement, red mud, etc. The mass ratio of filler and asphalt can be mixed in a one-to-one manner to obtain asphalt mortar.

[0066] Furthermore, the asphalt mortar is subjected to force curve scanning by atomic force microscopy. When preparing the atomic force microscopy test sample, the asphalt mortar sample needs to be pretreated to obtain an atomic force microscopy test sample with a smooth, bright surface and no dust. The atomic force microscope is used to scan the nanoscopic surface of the atomic force microscopy test sample by force curve scanning. The linear coordinate of the distance between each field point and the adhesion interface is taken as the horizontal coordinate, and the logarithm of the DMT modulus value is taken as the vertical coordinate to obtain the curve of the field point-adhesion interface distance of the asphalt mortar and the DMT modulus.

[0067] Step 120, based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, the curve is divided into a first curve section, a second curve section and a third curve section according to the size of the slope, wherein the absolute value of the slope of the first curve section is less than a first threshold value and greater than or equal to a second threshold value, the absolute value of the slope of the second curve section is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve section is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, the first curve section is used as a structural asphalt area curve, the second curve section is used as a transition area curve, and the third curve section is used as a free asphalt area curve;

[0068] It should be noted that the curve of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar has the following characteristics: as the field point-adhesion interface distance increases, the modulus of each field point first decreases slowly, then decreases rapidly, and finally remains stable. Based on the decrease rate of the curve of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, the curve is divided into the first curve, the second curve and the third curve according to the size of the slope, wherein the absolute value of the slope of the first curve is less than the first threshold and greater than or equal to the second threshold, the absolute value of the slope of the second curve is greater than or equal to the first threshold, and the absolute value of the slope of the third curve is less than the second threshold and greater than or equal to the third threshold; the absolute value of the first threshold is greater than the absolute value of the second threshold, and the absolute value of the second threshold is greater than the absolute value of the third threshold.

[0069] For example, Figure 2 It is one of the schematic diagrams of the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar provided in the embodiment of the present application, with the highest point of the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar as point O, representing the adhesion interface between the filler and the asphalt, and the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar is divided into three sections, the first section is the curve section where the modulus decreases slowly, the second section is the curve section where the modulus decreases rapidly, and the third section is the curve section where the modulus remains stable.

[0070] Draw tangent lines for each point on the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus. The slope of the tangent line at each point is K. T Indicates the attenuation rate of the asphalt mortar modulus at each point, taking K in the first section T Draw a tangent line at a point in the stable region of change, and take the K of the second segment near the end of the first segment. T Draw a tangent line at a point in the stable region of change. The two tangent lines intersect at point ST. Similarly, take the point K in the second segment that is adjacent to the end of the third segment. T Draw a tangent line at a point in the stable region, and take K in the third segment. TDraw a tangent line at a point in the stable region of change, and the two tangent lines intersect at point TF.

[0071] Draw vertical lines through points O, ST, and TF. According to the physical meanings represented by each part of the curve, the curve segment between the vertical line at point O and the vertical line at point ST represents the structured asphalt area, the curve segment between the vertical line at point ST and the vertical line at point TF represents the transition area between the structured asphalt area and the free asphalt area, and the curve segment to the right of the vertical line at point TF represents the free asphalt area.

[0072] Step 130, determining the critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve;

[0073] It is worth noting that the dividing line between the transition zone and the free asphalt zone can indirectly characterize and evaluate the interfacial adhesion performance between asphalt and filler. The slope of the transition zone curve can represent the attenuation rate of the asphalt mortar modulus in the transition zone, and the slope of the free asphalt zone curve can represent the attenuation rate of the asphalt mortar modulus in the free asphalt zone. A tangent line is taken from a point in the transition zone curve adjacent to the free asphalt zone, and a tangent line is taken from a point in the free asphalt zone curve adjacent to the transition zone. The intersection of the two tangent lines is the critical point of the asphalt mortar, and the vertical coordinate corresponding to the critical point of the asphalt mortar is the critical DMT modulus of the asphalt mortar.

[0074] Step 140: Evaluate the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar.

[0075] Finally, based on the critical DMT modulus of asphalt mortar, the interfacial adhesion performance between asphalt and filler was evaluated. When the critical DMT modulus value of asphalt mortar is greater than or equal to the preset threshold, it indicates that the level of interfacial interaction between asphalt and filler is high, and the interfacial adhesion performance between asphalt and filler is good. When the critical DMT modulus value of asphalt mortar is less than the preset threshold, it indicates that the level of interfacial interaction between asphalt and filler is low, and the interfacial adhesion performance between asphalt and filler is poor.

[0076] According to the method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy provided in the embodiment of the present application, by obtaining the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar, and dividing the asphalt mortar into a structural asphalt region, a transition region and a free asphalt region based on the curve, the interfacial adhesion performance between asphalt and filler can be quickly analyzed, and the mechanical information of the adhesion interface influence area is collected by atomic force microscopy to further determine the critical DMT modulus of the asphalt mortar, which can effectively characterize and evaluate the interfacial adhesion performance between asphalt and filler, improve the accuracy and reliability of the interfacial adhesion performance evaluation, and have guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance between asphalt and filler and screening strong adhesion fillers.

[0077] In some embodiments, the step of obtaining a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus comprises:

[0078] Evenly apply the asphalt mortar on the glass sheet by dipping a tool, and place the glass sheet flat in a sealed container after drying;

[0079] Performing force curve scanning on the nanoscopic surface of the asphalt mortar through the atomic force microscope to obtain scanning data;

[0080] The scanning data is preprocessed to obtain a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus.

[0081] It is easy to understand that the process of obtaining the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus by atomic force microscopy specifically includes the following steps:

[0082] (1) Use a dipping tool to evenly apply the asphalt mortar on the glass sheet, dry the glass sheet and place it flat in a sealed container;

[0083] When preparing atomic force microscope test samples, the atomic force microscope test requires that the surface of the asphalt mortar sample is smooth, bright and dust-free. The asphalt mortar needs to be evenly applied on the glass slide using a dipping tool, and the glass slide is dried and placed flat in a sealed container.

[0084] Exemplarily, when preparing an atomic force microscope test sample, use a needle-shaped tool to dip 1g±0.2g of flowing asphalt mortar and evenly spread it on a glass slide. Then, place the glass slide containing the asphalt mortar flat in an oven at 135℃±1℃ for 180s±10s. Finally, take the glass slide containing the asphalt mortar out of the oven and place it flat in a dry, cold, sealed container.

[0085] (2) Scanning the force curve of the nanoscopic surface of the asphalt mortar through an atomic force microscope to obtain scanning data;

[0086] For example, when conducting an atomic force microscope test, the test temperature is 25°C, the scanning area is 40μm×40μm, there is only one protruding filler in the center of the area, the resolution is 128×128, and a force curve scan is performed on the nanoscopic surface of the asphalt mortar sample to obtain scanning data. The scanning data is field point height data and field point DMT modulus data in .spm format.

[0087] (3) The scanning data is preprocessed to obtain the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar.

[0088] For example, NanoScopeAnalysis software can be used to open the scanning data, export DMT modulus data in ASCII format, use Flatten and Plane Fit to flatten the scanning data, and then export height data in ASCII format. In order to find the mechanical information of a certain field point, the DMT modulus data and height data in ASCII format can be opened using the Windows system's application Notepad, and they are arranged into a 128×128 data matrix and organized into an Excel table to obtain respective .xls format files.

[0089] After obtaining the height and modulus data matrix in .xls format, Python software is used to associate the data at corresponding positions in the two files, filter out the data at a certain height or within a certain height in the height data file, and record the position of the field point (the row and column of the data in the matrix), and retrieve the corresponding modulus data according to the position in the DMT modulus data file.

[0090] After preprocessing the scanning data through NanoScope Analysis software, Excel software, Python software, etc., the modulus data in the DMT modulus file is used as the ordinate, and the data in the height data file is used as the horizontal and vertical scales to make a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus: taking the adhesion interface as the starting point, the distance between each field point and the adhesion interface is the horizontal coordinate, and the DMT modulus value is the vertical coordinate, where the horizontal coordinate takes the linear coordinate and the vertical coordinate takes the logarithmic coordinate with base 10.

[0091] In this embodiment, the asphalt mortar is evenly applied on a glass sheet, and the force curve of its nanoscale surface is scanned using an atomic force microscope to obtain a curve of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar. By preprocessing the scanning data, the change of the DMT modulus in the adhesion interface influence area in the asphalt mortar can be intuitively reflected, and the influence of the interfacial adhesion performance between asphalt and filler on the micromechanical properties of the asphalt mortar can be revealed, which has guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance between asphalt and filler and screening strong adhesion fillers.

[0092] In some embodiments, determining the critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve includes:

[0093] A tangent line is drawn based on the midpoint of the transition region curve. The tangent line expression of the midpoint of the transition region curve is as follows:

[0094]

[0095] in, represents the tangent dependent variable at the midpoint of the transition region curve, a represents the tangent slope at the midpoint of the transition region curve, x represents the tangent independent variable at the midpoint of the transition region curve, and b represents the tangent intercept at the midpoint of the transition region curve;

[0096] Based on the midpoint of the free asphalt area curve, a tangent line is drawn. The tangent line expression of the midpoint of the free asphalt area curve is as follows:

[0097]

[0098] in, represents the tangent dependent variable of the midpoint of the free asphalt area curve, c represents the tangent slope of the midpoint of the free asphalt area curve, x represents the tangent independent variable of the midpoint of the free asphalt area curve, and d represents the tangent intercept of the midpoint of the free asphalt area curve;

[0099] The critical DMT modulus of the asphalt mortar is determined based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve.

[0100] For example, Figure 3 This is a second schematic diagram of the curve of the distance between the field point and the adhesion interface of the asphalt mortar provided in the embodiment of the present application and the DMT modulus, as shown in FIG. Figure 3 As shown, the asphalt mortar is mineral powder asphalt mortar. , The critical DMT modulus value of mineral powder asphalt mortar is 830.17KMPa.

[0101] For example, Figure 4 This is a third schematic diagram of a curve of the distance between the field point and the adhesion interface of the asphalt mortar provided in the embodiment of the present application and the DMT modulus, as shown in FIG. Figure 4 As shown, the asphalt mortar is slaked lime asphalt mortar. , The critical DMT modulus value of slaked lime asphalt mortar is 2515.82KMPa.

[0102] For example, Figure 5 This is a fourth schematic diagram of a curve of the distance between the field point and the adhesion interface of the asphalt mortar provided in the embodiment of the present application and the DMT modulus, as shown in FIG. Figure 5 As shown, the asphalt mortar is cement asphalt mortar. , , the critical DMT modulus value of cement asphalt mortar is 1083.43KMPa.

[0103] For example, Figure 6 Schematic diagram of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus curve provided in the embodiment of the present application is No. 5, as shown in FIG. Figure 6As shown, the asphalt mortar is red mud asphalt mortar. , The critical DMT modulus value of red mud asphalt mortar is 2104.49KMPa.

[0104] In this embodiment, the critical DMT modulus of the asphalt mortar can be obtained by analyzing the tangent lines at the midpoint of the transition region and the free asphalt region curves. By calculating the slope and intercept of the tangent lines at the midpoint, the mechanical response characteristics of the asphalt mortar in different stress regions can be captured in detail. This can be used to screen highly adhesive fillers, guide actual engineering projects, and provide data support for the mix design of asphalt materials, which helps to improve the durability and stability of asphalt mixtures, thereby improving the long-term benefits of road construction and maintenance.

[0105] In some embodiments, determining the critical DMT modulus of the asphalt mortar based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve comprises:

[0106] Determine the intersection of the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve based on the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve;

[0107] The critical DMT modulus of the asphalt mortar is determined based on the ordinate of the intersection of the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve.

[0108] It is easy to understand that based on the tangent line of the midpoint of the transition area curve and the tangent line of the midpoint of the free asphalt area curve, the intersection point TF of the tangent line of the midpoint of the transition area curve and the tangent line of the midpoint of the free asphalt area curve is determined.

[0109] The modulus corresponding to the TF point is denoted as M T-F , M T-F Defined as the critical modulus between the transition region and the free asphalt region, M T-F It is an evaluation index of the micromechanical properties of asphalt mortar, which can indirectly characterize and evaluate the interfacial adhesion performance between asphalt and filler. T-F The larger the value is, the higher the level of interface interaction between asphalt and filler is, and the stronger the interface adhesion performance between asphalt and filler is.

[0110] In this embodiment, the critical DMT modulus of the asphalt mortar is determined by the ordinate of the intersection of the midpoint tangent of the transition area curve and the midpoint tangent of the free asphalt area curve, which can effectively characterize and evaluate the interfacial adhesion performance between asphalt and filler, and has guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance between asphalt and filler and screening strong adhesion fillers.

[0111] In some embodiments, the evaluation of the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar includes:

[0112] Based on the critical DMT modulus and interface adhesion performance parameters of the asphalt mortar, a correlation regression equation is constructed;

[0113] Based on the correlation regression equation, when the critical DMT modulus of the asphalt mortar is greater than 0 and less than a first preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a weak grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the first preset threshold and less than a second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a medium grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a strong grade;

[0114] The interfacial adhesion performance between the asphalt and the filler is divided into weak, medium and strong grades.

[0115] It should be noted that, at the asphalt mixture level, the standard scattering test and the immersion scattering test can characterize the water stability of the asphalt mixture, and the water stability of the asphalt mixture is mainly determined by the interfacial adhesion performance between the constituent materials. The interfacial adhesion performance between asphalt and filler is positively correlated with the water stability of the asphalt mixture.

[0116] For example, for M T-F The correlation analysis was carried out with the interface adhesion performance parameter C value of asphalt mortar at 60℃ and the water stability performance evaluation index of asphalt mixture, namely standard scattering loss and immersion scattering loss. The complex modulus of asphalt and four asphalt mortars at 60℃ can be determined by dynamic shear test, and then the interface adhesion performance parameter C value of asphalt mortar at 60℃ is calculated to verify the critical modulus M between the transition area and the free asphalt area. T-F The rationality of M is expressed in the form of a linear equation. T-F The mathematical expression of the regression equation is y=1410.5x-1342.7, and the correlation coefficient R 2 is 0.8874, take C value as x, take M T-F is y. M of asphalt mortar T-F The correlation coefficient with C value is greater than 0.85, which is a very strong correlation. T-F The rationality of characterizing the interfacial adhesion properties of asphalt and filler is verified.

[0117] For example, to verify the critical modulus M between the transition region and the free asphalt region T-F The rationality of M is expressed in the form of a linear equation. T-FThe fitting analysis was performed with the water stability performance evaluation index of asphalt mixture, namely standard scattering loss and immersion scattering loss. The mathematical expressions of the regression equations were y=-96.8x+3222.8 and y=-83.0x+3366.6, respectively. The correlation coefficient R 2 are 0.7998 and 0.7141 respectively. The standard scattering loss or water immersion scattering loss is taken as the independent variable x. M T-F is the dependent variable y. T-F The correlation coefficient with the standard flying loss and water-immersion flying loss of asphalt mixture is greater than 0.7, which is a strong correlation. T-F The rationality of characterizing the interfacial adhesion performance of asphalt and filler was further verified.

[0118] Based on the concept of dynamic mechanical analysis, M T-F It is an evaluation index of the micromechanical properties of asphalt mortar, which can indirectly characterize and evaluate the interfacial adhesion performance between asphalt and filler. T-F The larger the value, the higher the level of interaction between the asphalt and filler interface, and the stronger the asphalt and filler interface adhesion performance. The asphalt and filler interface adhesion performance can be divided into three levels: weak, medium, and strong. <M T-F <500KMPa, the interface adhesion between asphalt and filler is weak; when 500 <M T-F <1500KMPa, the interface adhesion between asphalt and filler is medium; when M T-F >1500KMPa, the interface adhesion between asphalt and filler is strong.

[0119] In this embodiment, by combining the dynamic mechanical analysis method, the correlation between the microscopic mechanical property evaluation index of asphalt mortar and the interfacial adhesion performance between asphalt and filler and the water stability performance of asphalt mixture is established. The interfacial adhesion performance between asphalt and filler in asphalt mortar with different fillers can be quantified quickly and accurately, which has guiding significance for the real, intuitive, rapid and accurate evaluation of the interfacial adhesion performance between asphalt and filler and the screening of strong adhesion fillers.

[0120] In some embodiments, the calculation formula of the interface adhesion performance parameter is as follows:

[0121] ;

[0122] in, represents the complex modulus of asphalt mortar, represents the complex modulus of asphalt, represents the filler volume fraction, and C represents the interface adhesion performance parameter.

[0123] It is easy to understand that, at the asphalt mortar level, the interfacial adhesion performance parameter C value proposed based on rheological theory, polymer composite theory and interface theory can characterize the interfacial adhesion performance between asphalt and filler.

[0124] In this embodiment, by analyzing the correlation between the critical DMT modulus and the interface adhesion performance parameter C value, the rationality of the critical DMT modulus as an evaluation index is verified, which can truly reflect the mechanical information of the adhesion interface influence area.

[0125] The interface adhesion performance evaluation method of asphalt and filler based on atomic force microscopy provided in the embodiment of the present application can be performed by an interface adhesion performance evaluation device of asphalt and filler based on atomic force microscopy. In the embodiment of the present application, the interface adhesion performance evaluation method of asphalt and filler based on atomic force microscopy is performed by an interface adhesion performance evaluation device of asphalt and filler based on atomic force microscopy as an example to illustrate the interface adhesion performance evaluation device of asphalt and filler based on atomic force microscopy provided in the embodiment of the present application.

[0126] The present application also provides an apparatus for evaluating the interfacial adhesion performance of asphalt and filler based on an atomic force microscope. Figure 7 As shown, the device for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy includes: an acquisition module 710 , a processing module 720 , a determination module 730 and an evaluation module 740 .

[0127] An acquisition module 710 is used to obtain a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus, wherein the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus is obtained by scanning the force curve of the asphalt mortar using an atomic force microscope, wherein the asphalt mortar includes asphalt and filler;

[0128] Processing module 720, for dividing the curve into a first curve segment, a second curve segment and a third curve segment according to the size of the slope based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, wherein the absolute value of the slope of the first curve segment is less than a first threshold value and greater than or equal to a second threshold value, the absolute value of the slope of the second curve segment is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve segment is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, and the first curve segment is used as a structural asphalt area curve, the second curve segment is used as a transition area curve, and the third curve segment is used as a free asphalt area curve;

[0129] A determination module 730, for determining a critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve;

[0130] The evaluation module 740 is used to evaluate the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar.

[0131] According to the device for evaluating the interfacial adhesion performance of asphalt and filler based on atomic force microscopy provided in the embodiment of the present application, by obtaining the curve of the field point-adhesion interface distance and DMT modulus of the asphalt mortar, and dividing the asphalt mortar into a structural asphalt region, a transition region and a free asphalt region based on the curve, the interfacial adhesion performance of the asphalt and the filler can be quickly analyzed, and the mechanical information of the adhesion interface influence area is collected by atomic force microscopy to further determine the critical DMT modulus of the asphalt mortar, which can effectively characterize and evaluate the interfacial adhesion performance of the asphalt and the filler, thereby improving the accuracy and reliability of the interfacial adhesion performance evaluation, and having guiding significance for truly intuitively, quickly and accurately evaluating the interfacial adhesion performance of asphalt and filler and screening strong adhesion fillers.

[0132] The device for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy provided in the embodiment of the present application can achieve Figures 1 to 6 To avoid repetition, the various processes implemented in the embodiment of the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy are not described here.

[0133] In some embodiments, Figure 8 As shown, an embodiment of the present application further provides an electronic device 800, including a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the program is executed by the processor 801, each process of the embodiment of the method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0134] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0135] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned embodiment of the method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0136] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0137] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the above-mentioned method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy.

[0138] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0139] An embodiment of the present application further provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned embodiment of the method for evaluating the interface adhesion performance of asphalt and filler based on atomic force microscopy, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0140] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0141] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0142] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the interface adhesion performance evaluation method of asphalt and filler based on atomic force microscopy in each embodiment of the present application.

[0143] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0144] In the description of the present application, “plurality” means two or more.

[0145] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0146] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0147] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy, characterized in that: The method comprises: Obtaining a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus, wherein the curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus is obtained by scanning the force curve of the asphalt mortar using an atomic force microscope, wherein the asphalt mortar includes asphalt and filler; Based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, the curve is divided into a first curve section, a second curve section and a third curve section according to the size of the slope, wherein the absolute value of the slope of the first curve section is less than the first threshold value and greater than or equal to the second threshold value, the absolute value of the slope of the second curve section is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve section is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, the first curve section is taken as the structural asphalt area curve, the second curve section is taken as the transition area curve, and the third curve section is taken as the free asphalt area curve; Determining a critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve; Based on the critical DMT modulus of the asphalt mortar, the interfacial adhesion performance between the asphalt and the filler was evaluated.

2. The method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy according to claim 1, characterized in that: The curve of obtaining the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus includes: Evenly apply the asphalt mortar on the glass sheet by dipping a tool, and place the glass sheet flat in a sealed container after drying; Performing force curve scanning on the nanoscopic surface of the asphalt mortar through the atomic force microscope to obtain scanning data; The scanning data is preprocessed to obtain a curve of the distance between the field point and the adhesion interface of the asphalt mortar and the DMT modulus.

3. The method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy according to claim 1, characterized in that: Determining the critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve includes: A tangent line is drawn based on the midpoint of the transition region curve. The tangent line expression of the midpoint of the transition region curve is as follows: ； in, represents the tangent dependent variable at the midpoint of the transition region curve, a represents the tangent slope at the midpoint of the transition region curve, x represents the tangent independent variable at the midpoint of the transition region curve, and b represents the tangent intercept at the midpoint of the transition region curve; A tangent line is drawn based on the midpoint of the free asphalt area curve. The tangent line expression of the midpoint of the free asphalt area curve is as follows: ； in, represents the tangent dependent variable of the midpoint of the free asphalt area curve, c represents the tangent slope of the midpoint of the free asphalt area curve, x represents the tangent independent variable of the midpoint of the free asphalt area curve, and d represents the tangent intercept of the midpoint of the free asphalt area curve; Based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve, the critical DMT modulus of the asphalt mortar is determined.

4. The method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy according to claim 3, characterized in that: The method of determining the critical DMT modulus of the asphalt mortar based on the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve comprises: Determine the intersection of the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve based on the tangent line at the midpoint of the transition region curve and the tangent line at the midpoint of the free asphalt region curve; The critical DMT modulus of the asphalt mortar is determined based on the ordinate of the intersection of the tangent line of the midpoint of the transition region curve and the tangent line of the midpoint of the free asphalt region curve.

5. The method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy according to claim 1, characterized in that: The method of evaluating the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar comprises: Based on the critical DMT modulus and interface adhesion performance parameters of the asphalt mortar, a correlation regression equation is constructed; Based on the correlation regression equation, when the critical DMT modulus of the asphalt mortar is greater than 0 and less than a first preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a weak grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the first preset threshold and less than a second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a medium grade; when the critical DMT modulus of the asphalt mortar is greater than or equal to the second preset threshold, the interface adhesion performance between the asphalt and the filler is determined to be a strong grade; The interfacial adhesion performance between the asphalt and the filler is divided into weak, medium and strong grades.

6. The method for evaluating the interfacial adhesion performance between asphalt and filler based on atomic force microscopy according to claim 5, characterized in that: The calculation formula of the interface adhesion performance parameter is as follows: ； in, represents the complex modulus of asphalt mortar, represents the complex modulus of asphalt, represents the filler volume fraction, and C represents the interface adhesion performance parameter.

7. An apparatus for evaluating the interfacial adhesion performance of asphalt and filler based on atomic force microscopy, which is implemented by the method for evaluating the interfacial adhesion performance of asphalt and filler based on atomic force microscopy according to any one of claims 1 to 6, characterized in that: The device comprises: An acquisition module, used for acquiring a curve of a distance between a field point and an adhesion interface of asphalt mortar and a DMT modulus, wherein the curve of a distance between a field point and an adhesion interface of asphalt mortar and a DMT modulus is obtained by scanning a force curve of the asphalt mortar using an atomic force microscope, wherein the asphalt mortar includes asphalt and a filler; A processing module, for dividing the curve into a first curve segment, a second curve segment and a third curve segment according to the size of the slope based on the curve drop rate of the field point-adhesion interface distance and the DMT modulus of the asphalt mortar, wherein the absolute value of the slope of the first curve segment is less than a first threshold value and greater than or equal to a second threshold value, the absolute value of the slope of the second curve segment is greater than or equal to the first threshold value, and the absolute value of the slope of the third curve segment is less than the second threshold value and greater than or equal to the third threshold value; the absolute value of the first threshold value is greater than the absolute value of the second threshold value, and the absolute value of the second threshold value is greater than the absolute value of the third threshold value, and the first curve segment is used as a structural asphalt area curve, the second curve segment is used as a transition area curve, and the third curve segment is used as a free asphalt area curve; A determination module, for determining a critical DMT modulus of the asphalt mortar based on the transition region curve and the free asphalt region curve; An evaluation module is used to evaluate the interfacial adhesion performance between the asphalt and the filler based on the critical DMT modulus of the asphalt mortar.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy as described in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for evaluating the interface adhesion performance between asphalt and filler based on atomic force microscopy as described in any one of claims 1 to 6 is implemented.

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