A method and system for determining the dosage of solid waste powder materials in asphalt pavement applications

Abstract

This invention discloses a method and system for determining the dosage of solid waste powder materials in asphalt pavement applications, relating to the field of road material performance evaluation technology. The method includes the following steps: preparing stone slabs of fixed size and treating the adhesion surface of the slabs; preparing adhesion performance test specimens; subjecting the adhesion performance test specimens to environmentally coupled aging treatment; conducting multi-point loading tests on the adhesion performance test specimens and acquiring test data; and determining the optimal dosage of solid waste powder materials for filler application in asphalt pavement materials based on adhesion parameters. This invention uses the adhesion parameters of aged adhesion specimens between stone slabs and asphalt mastic as the evaluation basis to evaluate the effectiveness of solid waste powder materials in increasing the structural asphalt content, thereby determining the optimal dosage of solid waste powder materials for filler application in asphalt pavement materials, providing a relevant basis for the resource utilization of solid waste powder materials in road engineering.

Description

Technical Field

[0001] This invention relates to the field of road material performance evaluation technology, and in particular to a method and system for determining the dosage of solid waste powder materials in asphalt pavement. Background Technology

[0002] With the improvement of economic development and the advancement of urbanization, the amount of solid waste powder materials generated in my country is increasing year by year, occupying a large amount of land resources and posing significant ecological and environmental safety hazards. Comprehensive utilization of solid waste powder materials can effectively improve resource utilization and promote high-quality development. Using solid waste as filler in asphalt mixtures can improve the performance of the mixtures, reduce the consumption of traditional building materials, increase the utilization rate of solid waste, fundamentally reduce the environmental impact of solid waste, and lower road construction costs, thus having positive significance for both environmental protection and road construction.

[0003] The interfacial interaction between asphalt and aggregates has a significant impact on the performance of asphalt mixtures, with adhesion being a key factor. Asphalt forms a thin film covering the surface of aggregate particles, effectively bonding them. This not only affects the overall cohesiveness of the mixture but also directly relates to the service performance and lifespan of the pavement. Existing research indicates that using solid waste powder materials as fillers in asphalt mixtures can improve their adhesion, thermal stability, and aging resistance. However, the types and properties of solid waste powder materials are diverse, and their impact on the adhesion between asphalt and aggregates has not been systematically and thoroughly studied. Current methods for analyzing adhesion suffer from limitations such as relying on single indicators and failing to comprehensively and systematically evaluate aggregate-asphalt adhesion. Therefore, there is an urgent need for a method to determine the dosage of solid waste powder materials in asphalt pavement materials. This method should evaluate the adhesion between solid waste powder materials and asphalt and aggregates through multi-indicator correlation, thereby determining the optimal filler dosage of solid waste powder materials to facilitate their promotion and application in road construction. Summary of the Invention

[0004] In view of the problems existing in the determination of the dosage of solid waste powder materials in asphalt pavement and the system, this invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that current methods for analyzing adhesion have the disadvantages of using a single indicator and failing to combine multiple factors, thus failing to comprehensively and systematically evaluate adhesion.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide a method for determining the dosage of solid waste powder materials used in asphalt pavement, comprising the following steps:

[0008] Prepare stone slabs of fixed size and treat the adhesion surface of the stone slabs;

[0009] Preparation of adhesion performance test specimens;

[0010] The adhesion performance test specimens were subjected to environmental coupling aging treatment.

[0011] Multi-point loading tests were performed on the adhesion performance test specimens, and test data were obtained;

[0012] The optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials was determined based on adhesion parameters.

[0013] As a preferred embodiment of the method for determining the dosage of the solid waste powder material described in this invention in asphalt pavement, the step of treating the adhesion surface of the stone slab includes:

[0014] The stone slab is cut using a laser cutting machine, with one side of the slab serving as the adhesion surface. It is then polished using a CNC grinding machine. After polishing, the slab is placed in an ultrasonic cleaner and cleaned at 60°C for 20-30 minutes to remove surface powder and dust.

[0015] After cleaning, place the stone slabs in a 100℃ oven and dry them at a constant temperature for 1-2 hours.

[0016] The roughness of the adhesion surface of the stone slab was measured using a roughness tester. The roughness of the center position and the midpoint positions of the four sides of the adhesion surface were tested respectively. The average value of the test results was taken as the roughness of the polished surface of the stone slab.

[0017] If the roughness is less than 5μm, it meets the standard. If the roughness is not less than 5μm, grinding is repeated until the roughness index meets the requirements.

[0018] The prepared stone slabs are placed in an oven at 180℃-200℃ for heating and later use.

[0019] In a preferred embodiment of the method for determining the dosage of the solid waste powder material described in this invention for use in asphalt pavement, the step of preparing the adhesion performance test specimen includes:

[0020] Asphalt and solid waste powder materials were preheated to 135 ℃±1℃ respectively. Then, solid waste powder was weighed according to powder-binder mass ratios of 0.6, 0.8, 0.1, 1.2 and 1.4 respectively. The weighed solid waste powder was added to molten asphalt and the mixture was sheared at high speed using a high-speed shearing device to prepare solid waste powder-asphalt mortar with different powder-binder ratios.

[0021] Remove the stone slab from the oven and place it with the adhesive side up into the 3D printer. Pour the pre-prepared solid waste powder-asphalt slurry into the 3D printer's feed inlet and print a uniformly distributed asphalt film with a thickness of 1-3mm on the adhesive side of the stone slab using the parallel printing mode. Then, remove another stone slab from the oven and attach it to the asphalt film with the adhesive side down to obtain the finished product.

[0022] Place the finished product in the center of the rectangular tube, and place a steel plate on top of the finished product. Place a weight of 5-10 kg in the center above the steel plate. Place the finished product, the rectangular tube, and the weight in a 60℃ oven and let them stand for 1-2 hours. When the steel plate and the rectangular tube are in contact, the thickness of the asphalt film between the stone slabs no longer changes. At this point, take out the finished product and let it stand at room temperature for 3-5 hours.

[0023] The thickness of the asphalt film was measured using a micrometer screw gauge, and the thickness of the asphalt film between the stone slabs was controlled within 1 ± 0.05 mm. The asphalt overflowing between the stone slabs was scraped off with a hot scraper to obtain the adhesion performance test specimen.

[0024] As a preferred embodiment of the method for determining the dosage of the solid waste powder material described in this invention in asphalt pavement, the step of subjecting the adhesion performance test specimen to environmentally coupled aging treatment includes:

[0025] The adhesion performance test specimens were placed in the UV accelerated weathering tester with their sides facing the UV radiation source.

[0026] The placement of the adhesion performance test specimens was manually adjusted every 82.5 hours, and other sides were changed to face the ultraviolet radiation source so that each side of the adhesion performance test specimens could be uniformly subjected to ultraviolet aging.

[0027] After aging, the adhesion performance test specimens were placed in a room temperature environment for 6-12 hours for curing.

[0028] As a preferred embodiment of the method for determining the dosage of solid waste powder material in asphalt pavement according to the present invention, the step of obtaining test data includes:

[0029] Two tensile molds 2 were bonded to the upper and lower surfaces of the adhesion performance test specimen respectively using epoxy resin adhesive;

[0030] According to the requirements of different load conditions, epoxy resin adhesive is evenly applied to the bottom and sides of the loading point of the tensile mold 1 that needs to be bonded, and then bonded to the corresponding loading point hole at the top of the tensile mold 2. After bonding, the tensile mold 1 is fixed in a 20KN electro-hydraulic servo fatigue testing machine. Cyclic dynamic load is applied to the morphology index specimen to simulate the repeated changes of actual traffic load. Static load is applied to the mechanical index specimen and the control specimen to test their bonding strength until the asphalt film between the adhesion performance test specimens is completely separated.

[0031] The requirements for the load conditions include the first load condition, the second load condition, and the third load condition.

[0032] As a preferred embodiment of the method for determining the dosage of solid waste powder material in asphalt pavement according to the present invention, wherein: the adhesion parameter index is the asphalt adhesion rate of morphological index specimens under different loading conditions. Morphological index I1, mechanical properties, and destructive energy of the specimen. Mechanical index I2 and destructive work W of the control specimen 0i , Aging resistance rate U i Aging index I3.

[0033] As a preferred embodiment of the method for determining the dosage of solid waste powder material in asphalt pavement according to the present invention, the method for determining the optimal dosage of solid waste powder material in asphalt pavement material for filler application includes:

[0034] Draw radar charts for morphology index I1, mechanical index I2, and aging index I3;

[0035] Calculate the area S of the radar image, and determine the optimal filler content of solid waste powder materials by comparing the area sizes.

[0036] Wherein, the asphalt adhesion rate The calculation formula is as follows:

[0037] ;

[0038] In the formula, The asphalt adhesion rate represents the ratio of the asphalt pixel area to the total pixel area. The larger the value, the better the adhesion performance of the morphological index specimen; i represents the number of different load conditions; X1 and X2 represent the pixel areas of the asphalt on the upper and lower adhesion surfaces of the morphological index specimen; X represents the sum of the pixel areas of the adhesion surfaces in the loading point images of the upper and lower adhesion surfaces of the morphological index specimen.

[0039] The formula for calculating the morphology index I1 is as follows:

[0040] ;

[0041] In the formula, For morphological index; The average value of the asphalt adhesion rate of the specimens under different load conditions is the morphological index. The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The maximum value in; The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The minimum value in;

[0042] The destructive power The calculation formula is as follows:

[0043] ;

[0044] In the formula, The destructive work is the area under the load-displacement curve of the specimen, expressed in J. The larger the value, the better the adhesion performance of the mechanical index specimen; i represents the number of different load conditions; F(x) is the load as a function of displacement x in the load-displacement curve of the mechanical index specimen; L is the maximum breaking tensile force F in the load-displacement curve. max The corresponding displacement in the load-displacement diagram;

[0045] The formula for calculating the mechanical index I2 is as follows:

[0046] ;

[0047] In the formula, For mechanical indices; The average value of the failure energy of the specimen under different load conditions; The average destructive energy of specimens with different solid waste powder admixtures. The maximum value in; The average destructive energy of specimens with different solid waste powder admixtures. The minimum value in;

[0048] The aging resistance rate U i The calculation formula is as follows:

[0049] ;

[0050] In the formula, The aging resistance rate of the test specimen under different load conditions is used as a reference; i represents the number of the different load conditions. The failure work of the specimen under different loading conditions is the mechanical index. To compare the failure energy of the specimen under different loading conditions;

[0051] The aging index I3 is calculated using the following formula:

[0052] ;

[0053] in, The aging index; The average aging resistance rate of the control specimens under different load conditions; The average aging resistance rate of control specimens with different solid waste powder content The maximum value in; The average aging resistance rate of control specimens with different solid waste powder content The minimum value in;

[0054] The formula for calculating the area S of the radar image is:

[0055] ;

[0056] ;

[0057] ;

[0058] ;

[0059] Where S is the total area of ​​the radar image, with the center point of the radar image as the origin O, and the morphology index I1, mechanical index I2, and aging index I3 corresponding to points A, B, and C on the radar image, respectively. They are located on rays emanating from the origin, and their distances from the origin are a, b, and c, respectively; S OAB S represents the area of ​​the triangle formed by points O, A, and B in the radar image; OBC S represents the area of ​​the triangle formed by points O, B, and C in the radar image; OAC This represents the area of ​​the triangle formed by points O, A, and C in the radar image.

[0060] Secondly, embodiments of the present invention provide a system for determining the dosage of solid waste powder materials in asphalt pavement, which includes a stone slab preparation module, an adhesion performance test specimen preparation module, a multi-point loading test module, an environmental coupled aging treatment module, and an optimal dosage determination module.

[0061] The stone slab preparation module is used to prepare stone slabs of fixed size and to treat the adhesion surface of the stone slabs;

[0062] The adhesion performance test specimen preparation module prepares specimens for adhesion performance testing;

[0063] The environmental coupling aging treatment module performs environmental coupling aging treatment on the adhesion performance test specimens.

[0064] The multi-point loading test module performs multi-point loading tests on the adhesion performance test specimen and acquires test data;

[0065] The optimal dosage determination module determines the optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials based on adhesion parameters.

[0066] Thirdly, embodiments of the present invention provide a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any step of the above-described method for determining the dosage of solid waste powder materials in asphalt pavement.

[0067] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, it implements any step of the method for determining the dosage of solid waste powder materials used in asphalt pavement as described above.

[0068] The beneficial effects of this invention are as follows: by performing coupled aging, static, and dynamic multi-point loading treatment on the adhesion performance test specimens, the evaluation of the adhesion of solid waste powder materials to asphalt is more consistent with the adhesion of asphalt mortar and aggregate in real pavement materials. Moreover, the comprehensive analysis results of multiple indicators are highly accurate and can comprehensively and systematically reflect the adhesion of solid waste powder materials to asphalt mortar, determine the optimal filler application dosage of solid waste powder materials in asphalt pavement materials, and have good practical application value. Attached Figure Description

[0069] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0070] Figure 1 This is a flowchart of the technical solution of the present invention.

[0071] Figure 2 This is a three-dimensional view of the adhesion performance test specimen of the present invention.

[0072] Figure 3 This is a front view of the rectangular tube and steel plate of the present invention.

[0073] Figure 4 This is a top view of the rectangular tube and steel plate of the present invention.

[0074] Figure 5 This is a front view of the tensile test mold 1 of the present invention.

[0075] Figure 6 This is a top view of the tensile test mold 1 of the present invention.

[0076] Figure 7 This is a bottom view of the tensile test mold 1 of the present invention and the coordinate position of the loading point.

[0077] Figure 8 This is a front view of the tensile test mold 2 of the present invention.

[0078] Figure 9 This is a top view of the tensile test mold 2 of the present invention.

[0079] Figure 10 This is a schematic diagram of the tensile test of the adhesion performance test specimen of the present invention.

[0080] Figure 11 This is a schematic diagram illustrating the radar map area calculation according to the present invention.

[0081] Figure 12 The radar image shows the corresponding test specimens for adhesion performance testing of various solid waste powder dosages in the embodiments of the present invention.

[0082] In the figure, 1. Tensile test mold 1; 2. Tensile test mold 2; 3. Stone slab; 4. Solid waste powder-asphalt mortar. Detailed Implementation

[0083] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0084] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0085] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0086] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0087] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0088] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0089] Example 1

[0090] Reference Figures 1-12 This is the first embodiment of the present invention, which provides a method for determining the dosage of solid waste powder materials in asphalt pavement, including the following steps:

[0091] S1. Prepare stone slabs of fixed size and treat the adhesion surface of the stone slabs.

[0092] The steps for treating the adhesion surface of the slate include:

[0093] A 100mm×100mm×50mm stone slab was cut using a laser cutting machine. The 100mm×100mm side of the stone slab was used as the adhesion surface and was polished using a CNC grinding machine. After polishing, the stone slab was placed in an ultrasonic cleaning machine and cleaned at 60℃ for 30 minutes to remove surface powder and dust.

[0094] The cleaned stone slabs were placed in an oven at 100℃ and dried at a constant temperature for 2 hours, and the actual thickness of the stone slabs was measured using a micrometer.

[0095] Tests were conducted at the center positions of the top and bottom surfaces of the stone slab and at the midpoints of the four sides, and the average value was taken as the actual thickness h0 of the stone slab.

[0096] The roughness of the adhesion surface of the stone slab was measured using a roughness tester. The roughness of the center position and the midpoint positions of the four sides of the adhesion surface were tested respectively. The average value of the test results was taken as the roughness of the polished surface of the stone slab.

[0097] If the roughness is less than 5μm, it meets the standard. If the roughness is not less than 5μm, grinding is repeated until the roughness index meets the requirements.

[0098] The prepared stone slabs are placed in an oven at 200℃ for heating and later use.

[0099] In this embodiment, the stone slabs are made of common stones such as basalt, gray-green rock, and limestone; the cutting machine is a CNC laser cutting machine with a working width of 6000mm × 3000mm and a working power of 1000W; the CNC grinding machine is a CNC surface grinder with parameters set as follows: rotation speed 1500rpm, feed rate 100mm / min, cutting speed 0.2mm, and pressure 50N / cm. 2 The coolant flow rate is 10L / min; the micrometer is a mechanical micrometer with a measurement accuracy of 0.01mm and a measurement range of 25-50mm; the surface roughness tester is a TR200 surface roughness tester.

[0100] S2. Prepare adhesion performance test specimens.

[0101] Asphalt and solid waste powder materials were preheated to 135 ℃±1℃ respectively. Then, solid waste powder was weighed according to powder-binder mass ratios of 0.6, 0.8, 0.1, 1.2 and 1.4 respectively. The weighed solid waste powder was added to molten asphalt and the mixture was sheared at high speed using a high-speed shearing device to prepare solid waste powder-asphalt mortar with different powder-binder ratios.

[0102] The shearing temperature is 150℃, the shearing rate is 4500rpm, and the shearing time is 45min; the asphalt is base asphalt or modified asphalt, and the solid waste powder material is one or more of fly ash, waste incineration fly ash, and sludge ash.

[0103] Remove the stone slab from the oven and place it with the adhesive side facing up into the 3D printer. Pour the pre-prepared solid waste powder-asphalt slurry into the feed port of the 3D printer. Use the parallel printing mode to print a uniformly distributed asphalt film with a thickness of 1-3mm on the adhesive side of the stone slab. In this embodiment, the asphalt film with a thickness of 1mm is preferred. Then, remove another stone slab from the oven and attach it to the asphalt film with the adhesive side facing down to obtain the finished product.

[0104] Place the finished product in the center of the rectangular tube, and place a steel plate on top of the finished product. Place a 10kg weight in the center above the steel plate. Place the finished product, the rectangular tube, and the weight in a 60℃ oven and let them stand for 2 hours. When the steel plate and the rectangular tube are in contact, the thickness of the asphalt film between the stone slabs no longer changes. At this point, take out the finished product and let it stand at room temperature for 4 hours.

[0105] The thickness of the asphalt film was measured using a micrometer screw gauge, and the thickness of the asphalt film between the stone slabs was controlled within 1 ± 0.05 mm. The asphalt overflowing between the stone slabs was scraped off with a hot scraper to obtain the adhesion performance test specimen.

[0106] Nine specimens were prepared for the adhesion performance test under each solid waste powder material dosage, namely three specimens for morphological index, three specimens for mechanical index and three control specimens;

[0107] The 3D printer used is a RepRap Mendel90 3D printer. A 2mm diameter extrusion nozzle was selected, the printing speed was set to 5mm / s, and the printing temperature to 150℃. The printed asphalt strips were 2.5mm wide and 1mm thick. Forty asphalt strips, each 2.5mm wide and 100mm long, were printed and combined to form a 100mm×100mm asphalt film plane, covering the stone slab adhesion surface. A steel rectangular tube with external dimensions of 160mm×160mm×101mm and an outer wall thickness of 10mm, and internal dimensions of 140mm×140mm×101mm, was used. When the 160mm×160mm×10mm steel plate moved downwards under the influence of the weight above, it squeezed the asphalt film between the stone slabs. When the asphalt film thickness was squeezed to 1mm, the steel plate would lock onto the upper end of the steel rectangular tube, thus controlling the thickness of the asphalt film.

[0108] The method for measuring the thickness of the asphalt film is to use a micrometer to measure the total height from the top surface to the bottom surface of the adhesion performance test specimen, which is recorded as H. The sum of the heights of the two stone slabs is recorded as h, and the thickness of the asphalt film is represented by Hh.

[0109] S3. Perform environmental coupling aging treatment on the adhesion performance test specimens.

[0110] The adhesion performance test specimens were placed in the UV accelerated weathering tester with their sides facing the UV radiation source.

[0111] The placement of the adhesion performance test specimens was manually adjusted every 82.5 hours, and other sides were changed to face the ultraviolet radiation source so that each side of the adhesion performance test specimens could be uniformly subjected to ultraviolet aging.

[0112] After aging, the adhesion performance test specimens were placed in a room temperature environment for 10 hours for curing.

[0113] The environmental coupled aging treatment includes coupled simulation of three environmental conditions: light, temperature, and precipitation. An accelerated ultraviolet (UV) light weathering tester is used for the coupled environmental simulation. The UV aging parameters are set with an irradiance range of 0.6 W / m². 2 -0.8W / m 2The irradiation time was 330 hours. The adhesion performance test specimens were placed under the central axis of the UV aging lamp tube, 60 cm above the UV lamp tube, and the temperature parameter was 60℃. The precipitation parameter was 700 mm. The test was conducted by spraying with a nozzle (5 mm per minute). One spraying cycle was 24 hours, with one spraying per cycle, each spraying lasting 10 minutes and approximately 50 mm. There were 14 spraying cycles.

[0114] S4. Perform multi-point loading tests on the adhesion performance test specimens and obtain test data.

[0115] Two tensile molds 2 were bonded to the upper and lower surfaces of the adhesion performance test specimen respectively using epoxy resin adhesive;

[0116] According to the requirements of different load conditions, epoxy resin adhesive is evenly applied to the bottom and sides of the loading point of the tensile mold 1 that needs to be bonded, and then bonded to the corresponding loading point hole at the top of the tensile mold 2. After bonding, the tensile mold 1 is fixed in a 20KN electro-hydraulic servo fatigue testing machine. Cyclic dynamic load is applied to the morphology index specimen to simulate the repeated changes of actual traffic load. Static load is applied to the mechanical index specimen and the control specimen to test their bonding strength until the asphalt film between the adhesion performance test specimens is completely separated.

[0117] Among them, when the 20KN electro-hydraulic servo fatigue testing machine loads the specimen with morphological index, the loading frequency is set to 10Hz, the loading waveform is a sine wave, and the loading stress is... The stress ratio R is 0.1 ( R = When loading the mechanical property test specimens and control specimens, the test tensile force range is set to 5-20KN, and the loading rate is 10mm / min.

[0118] Among them, reference Figures 5-7The tensile test mold 1 is a steel cuboid with dimensions of 100mm × 100mm × 50mm. A pin head is connected to the midpoint of the top surface. The pin head is a cylinder with a bottom diameter of 20mm and a height of 50mm. A circular hole with a diameter of 15mm, connecting both ends of the cylinder, is arranged 20mm from the top surface. Seventeen smaller steel cuboids, each 10mm × 10mm × 20mm in size, are connected to the bottom surface of the large steel cuboid to apply multi-point tensile force to the adhesion performance test specimen. The positions of the protruding structures of the steel cuboids are distributed with the lower left corner of the square face as the origin of the coordinate system. The coordinates of the four corners of the bottom surface of the large steel cuboid are (0, 0), (0, 100), (10 ... (0, 0), (100, 100), the coordinates of the small steel cuboid are a1(0, 0), a2(0, 45), a3(0, 90), a4(45, 0), a5(90, 0), a6(45, 90), a7(90, 45), a8(90, 90), b1(22.5, 225), b2(22.5, 45), b3(22.5, 67.5), b4(45, 22.5), b5(67.5, 22.5), b6(45, 67.5), b7(67.5, 45), b8(67.5, 67.5), c1(45, 45), hereinafter referred to as the loading point coordinates instead of the steel cuboid position;

[0119] Reference Figures 8-9 The tensile test mold 2 is a steel cuboid with dimensions of 110mm×110mm×60mm. Its upper surface has 17 cuboid holes with dimensions of 10mm×10mm×20mm for bonding the loading points of the tensile mold 1. The lower end face has holes with dimensions of 100mm×100mm×10mm to ensure that the center of the adhesion performance test specimen and the mold is on the same axis during bonding. The adhesive is epoxy resin AB glue, which is bonded by mixing A glue and B glue in a 1:1 ratio.

[0120] The requirements for load conditions include three conditions: Condition 1, Condition 2, and Condition 3. Condition 1 corresponds to eight load points: a1, a2, a3, a4, a5, a6, a7, and a8. These load points are all located at the edge of the loading surface of the adhesion performance test specimen and are used to test the adhesion of solid waste powder material-asphalt mortar in the edge area of ​​the adhesion surface. Condition 2 corresponds to eight load points: b1, b2, b3, b4, b5, b6, b7, and b8. These load points are all located inside the loading surface of the adhesion performance test specimen and are used to test the adhesion of solid waste powder material-asphalt mortar in the inner area of ​​the adhesion surface. Condition 3 corresponds to all load points and is used to test the overall adhesion of solid waste powder material-asphalt mortar in the adhesion performance test specimen. The purpose of setting different load conditions is to comprehensively evaluate the bonding performance of solid waste powder material-asphalt mortar and improve the accuracy of the test.

[0121] After the tensile test of the morphology index specimen, photos of the two stone slab adhesion surfaces of the morphology index specimen were taken using a high-definition digital camera and imported into Fiji-Image image processing software. The images were then subjected to contrast enhancement, grayscale processing, and binarization processing in sequence to separate the morphology of the asphalt and exposed stone slab areas on the adhesion surface of the morphology index specimen (black pixels were identified as asphalt, and light-colored pixels were identified as stone slabs). The number of pixels of the asphalt, stone slab, and adhesion surface at each loading point in the image was obtained as the basic evaluation data. After the tensile test of the mechanical index specimen and the control specimen, the tensile force and displacement during the test were obtained as the basic evaluation data.

[0122] S5. Determine the optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials based on adhesion parameters.

[0123] The adhesion parameter is the asphalt adhesion rate of specimens under different loading conditions. Morphological index I1, mechanical properties, and destructive energy of the specimen. Mechanical index I2 and destructive work W of the control specimen 0i , Aging resistance rate U i Aging index I3.

[0124] Methods for determining the optimal dosage of solid waste powder materials as fillers in asphalt pavement materials include:

[0125] Draw radar charts for morphology index I1, mechanical index I2, and aging index I3;

[0126] Calculate the area S of the radar image, and determine the optimal filler content of solid waste powder materials by comparing the area sizes.

[0127] Among them, asphalt adhesion rate The calculation formula is as follows:

[0128] ;

[0129] In the formula, The asphalt adhesion rate represents the ratio of the asphalt pixel area to the total pixel area. The larger the value, the better the adhesion performance of the morphological index specimen; i represents the number of different load conditions; X1 and X2 represent the pixel areas of the asphalt on the upper and lower adhesion surfaces of the morphological index specimen; X represents the sum of the pixel areas of the adhesion surfaces in the loading point images of the upper and lower adhesion surfaces of the morphological index specimen.

[0130] The formula for calculating the morphology index I1 is as follows:

[0131] ;

[0132] In the formula, For morphological index; The average value of the asphalt adhesion rate of the specimens under different load conditions is the morphological index. The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The maximum value in; The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The minimum value in;

[0133] Destructive power The calculation formula is as follows:

[0134] ;

[0135] In the formula, The destructive work is the area under the load-displacement curve of the specimen, expressed in J. The larger the value, the better the adhesion performance of the mechanical index specimen; i represents the number of different load conditions; F(x) is the load as a function of displacement x in the load-displacement curve of the mechanical index specimen; L is the maximum breaking tensile force F in the load-displacement curve. max The corresponding displacement in the load-displacement diagram;

[0136] The formula for calculating the mechanical index I2 is as follows:

[0137] ;

[0138] In the formula, For mechanical indices; The average value of the failure energy of the specimen under different load conditions; The average destructive energy of specimens with different solid waste powder admixtures. The maximum value in; The average destructive energy of specimens with different solid waste powder admixtures. The minimum value in;

[0139] Aging resistance rate U i The calculation formula is as follows:

[0140] ;

[0141] In the formula, The aging resistance rate of the test specimen under different load conditions is used as a reference; i represents the number of the different load conditions. The failure work of the specimen under different loading conditions is the mechanical index. To compare the failure energy of the specimen under different loading conditions;

[0142] The formula for calculating the aging index I3 is as follows:

[0143] ;

[0144] in, The aging index; The average aging resistance rate of the control specimens under different load conditions; The average aging resistance rate of control specimens with different solid waste powder content The maximum value in; The average aging resistance rate of control specimens with different solid waste powder content The minimum value in;

[0145] The formula for calculating the area S of a radar image is:

[0146] ;

[0147] ;

[0148] ;

[0149] ;

[0150] Where S is the total area of ​​the radar image, with the center point of the radar image as the origin O, and the morphology index I1, mechanical index I2, and aging index I3 corresponding to points A, B, and C on the radar image, respectively. They are located on rays emanating from the origin, and their distances from the origin are a, b, and c, respectively; S OAB S represents the area of ​​the triangle formed by points O, A, and B in the radar image; OBC S represents the area of ​​the triangle formed by points O, B, and C in the radar image; OAC This represents the area of ​​the triangle formed by points O, A, and C in the radar image.

[0151] Table 1. Morphological index K of adhesion performance test specimens i , I1

[0152]

[0153] Table 2 Mechanical properties W of the adhesion performance test specimens i , I2

[0154]

[0155] Table 3 Mechanical properties W of the adhesion performance test specimens 0i and aging index U i , I3

[0156]

[0157] Table 4. Adhesion performance test specimens' various indices I1, I2, I3 and radar map area S

[0158]

[0159] In this embodiment, the morphological, mechanical and aging indices of the adhesion performance test specimens are shown in Tables 1-3. For the morphological index, the morphological index I1 reaches its maximum when the powder-to-binder ratio is 1.2, and the order from largest to smallest is 1.2>1.4>1.0>0.8>0.6.

[0160] Regarding mechanical properties, the mechanical index I2 reaches its maximum when the powder-to-binder ratio is 1.2, and the order from largest to smallest is 1.2 > 1.0 > 1.4 > 0.8 > 0.6.

[0161] Regarding aging indicators, the aging index I3 reaches its maximum when the powder-to-binder ratio is 1.2, and the order from largest to smallest is 1.2 > 1.0 > 1.4 > 0.8 > 0.6.

[0162] A radar chart was drawn based on three indicators: morphology index, mechanical index, and aging index, as shown below. Figure 12 As shown in Table 4, the radar map areas of each solid waste powder material were obtained. The radar map areas were sorted from largest to smallest as follows: 1.2 > 1.0 > 1.4 > 0.8 > 0.6. Comprehensive analysis shows that the optimal adhesion performance test specimen for asphalt mastic with the best solid waste powder material content is a powder-to-mass ratio of 1.2.

[0163] The analysis results are highly accurate and can comprehensively evaluate the adhesion performance between solid waste powder-asphalt mortar and aggregate slabs through multiple indicators. It can accurately and scientifically determine the optimal filler application dosage of solid waste powder materials in asphalt pavement materials.

[0164] In summary, by subjecting the adhesion performance test specimens to coupled aging, static, and dynamic multi-point loading treatments, the evaluation of the adhesion of solid waste powder materials to asphalt more closely reflects the adhesion between asphalt mastic and aggregates in real-world pavement materials. Furthermore, the comprehensive analysis of multiple indicators yields high accuracy, comprehensively and systematically reflecting the adhesiveness of solid waste powder material asphalt mastic, and determining the optimal filler dosage of solid waste powder materials in asphalt pavement materials. This approach has significant practical application value.

[0165] Example 2

[0166] Based on the first embodiment, this embodiment further provides a system for determining the dosage of solid waste powder materials in asphalt pavement, including a stone slab preparation module, an adhesion performance test specimen preparation module, a multi-point loading test module, an environmental coupling aging treatment module, and an optimal dosage determination module;

[0167] The stone slab preparation module is used to prepare stone slabs of fixed size and to treat the adhesion surface of the stone slabs;

[0168] The adhesion performance test specimen preparation module prepares specimens for adhesion performance testing;

[0169] The environmental coupling aging treatment module performs environmental coupling aging treatment on the adhesion performance test specimens.

[0170] The multi-point loading test module performs multi-point loading tests on the adhesion performance test specimens and acquires test data;

[0171] The optimal dosage determination module determines the optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials based on adhesion parameters.

[0172] This embodiment also provides a computer device applicable to the method for determining the dosage of solid waste powder materials in asphalt pavement, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to realize the method for determining the dosage of solid waste powder materials in asphalt pavement as proposed in the above embodiment.

[0173] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0174] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the method for determining the dosage of solid waste powder materials in asphalt pavement as proposed in the above embodiments.

[0175] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0176] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for determining the dosage of solid waste powder material in asphalt pavement, characterized in that: Includes the following steps, Prepare stone slabs of fixed size and treat the adhesion surface of the stone slabs; Preparation of adhesion performance test specimens; The adhesion performance test specimens were subjected to environmental coupling aging treatment. Multi-point loading tests were performed on the adhesion performance test specimens, and test data were obtained; The optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials was determined based on adhesion parameters. These adhesion parameters were defined as the asphalt adhesion rate of specimens under different loading conditions. Morphological index I1, mechanical properties, and destructive energy of the specimen. Mechanical index I2 and destructive work W of the control specimen 0i , Aging resistance rate U i Aging index I3; The methods for determining the optimal dosage of solid waste powder materials as fillers in asphalt pavement materials include... Draw radar charts for morphology index I1, mechanical index I2, and aging index I3; Calculate the area S of the radar image, and determine the optimal filler content of solid waste powder materials by comparing the area sizes. Wherein, the asphalt adhesion rate The calculation formula is as follows: ； In the formula, The asphalt adhesion rate represents the ratio of the asphalt pixel area to the total pixel area. The larger the value, the better the adhesion performance of the morphological index specimen; i represents the number of different load conditions; X1 and X2 represent the pixel areas of the asphalt on the upper and lower adhesion surfaces of the morphological index specimen; X represents the sum of the pixel areas of the adhesion surfaces in the loading point images of the upper and lower adhesion surfaces of the morphological index specimen. The formula for calculating the morphology index I1 is as follows: ； In the formula, For morphological index; The average value of the asphalt adhesion rate of the specimens under different load conditions is the morphological index. The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The maximum value in; The average asphalt adhesion rate of specimens with different solid waste powder admixture morphology indicators The minimum value in; The destructive power The calculation formula is as follows: ； In the formula, The destructive work is the area under the load-displacement curve of the specimen, expressed in J. The larger the value, the better the adhesion performance of the mechanical index specimen; i represents the number of different load conditions; F(x) is the load as a function of displacement x in the load-displacement curve of the mechanical index specimen; L is the maximum breaking tensile force F in the load-displacement curve. max The corresponding displacement in the load-displacement diagram; The formula for calculating the mechanical index I2 is as follows: ； In the formula, For mechanical indices; The average value of the failure energy of the specimen under different load conditions; The average destructive energy of specimens with different solid waste powder admixtures. The maximum value in; The average destructive energy of specimens with different solid waste powder admixtures. The minimum value in; The aging resistance rate U i The calculation formula is as follows: ； In the formula, The aging resistance rate of the test specimen under different load conditions is used as a reference; i represents the number of the different load conditions. The failure work of the specimen under different loading conditions is the mechanical index. To compare the failure energy of the specimen under different loading conditions; The aging index I3 is calculated using the following formula: ； in, The aging index; The average aging resistance rate of the control specimens under different load conditions; The average aging resistance rate of control specimens with different solid waste powder content The maximum value in; The average aging resistance rate of control specimens with different solid waste powder content The minimum value in; The formula for calculating the area S of the radar image is: ； ； ； ； Where S is the total area of ​​the radar image, with the center point of the radar image as the origin O, and the morphology index I1, mechanical index I2, and aging index I3 corresponding to points A, B, and C on the radar image, respectively. They are located on rays emanating from the origin, and their distances from the origin are a, b, and c, respectively; S OAB S represents the area of ​​the triangle formed by points O, A, and B in the radar image; OBC S represents the area of ​​the triangle formed by points O, B, and C in the radar image; OAC This represents the area of ​​the triangle formed by points O, A, and C in the radar image.

2. The method for determining the dosage of solid waste powder materials in asphalt pavement as described in claim 1, characterized in that: The steps for treating the adhesion surface of the slate include: The stone slab is cut using a laser cutting machine, with one side of the slab serving as the adhesion surface. It is then polished using a CNC grinding machine. After polishing, the slab is placed in an ultrasonic cleaner and cleaned at 60°C for 20-30 minutes to remove surface powder and dust. After cleaning, place the stone slabs in a 100℃ oven and dry them at a constant temperature for 1-2 hours. The roughness of the adhesion surface of the stone slab was measured using a roughness tester. The roughness of the center position and the midpoint positions of the four sides of the adhesion surface were tested respectively. The average value of the test results was taken as the roughness of the polished surface of the stone slab. If the roughness is less than 5μm, it meets the standard. If the roughness is not less than 5μm, grinding is repeated until the roughness index meets the requirements. The prepared stone slabs are placed in an oven at 180℃-200℃ for heating and later use.

3. The method for determining the dosage of solid waste powder materials in asphalt pavement as described in claim 2, characterized in that: The steps for preparing adhesion performance test specimens include: Asphalt and solid waste powder materials were preheated to 135 ℃±1℃ respectively. Then, solid waste powder was weighed according to powder-binder mass ratios of 0.6, 0.8, 0.1, 1.2 and 1.4 respectively. The weighed solid waste powder was added to molten asphalt and the mixture was sheared at high speed using a high-speed shearing device to prepare solid waste powder-asphalt mortar with different powder-binder ratios. Remove the stone slab from the oven and place it with the adhesive side up into the 3D printer. Pour the pre-prepared solid waste powder-asphalt slurry into the 3D printer's feed inlet and print a uniformly distributed asphalt film with a thickness of 1-3mm on the adhesive side of the stone slab using the parallel printing mode. Then, remove another stone slab from the oven and attach it to the asphalt film with the adhesive side down to obtain the finished product. Place the finished product in the center of the rectangular tube, and place a steel plate on top of the finished product. Place a weight of 5-10 kg in the center above the steel plate. Place the finished product, the rectangular tube, and the weight in an oven at 60℃ and let them stand for 1-2 hours. When the steel plate and the rectangular tube are in contact, the thickness of the asphalt film between the stone slabs no longer changes. At this point, take out the finished product and let it stand at room temperature for 3-5 hours. The thickness of the asphalt film was measured using a micrometer screw gauge, and the thickness of the asphalt film between the stone slabs was controlled within 1 ± 0.05 mm. The asphalt overflowing between the stone slabs was scraped off with a hot scraper to obtain the adhesion performance test specimen.

4. The method for determining the dosage of solid waste powder material in asphalt pavement as described in claim 3, characterized in that: The steps for subjecting adhesion performance test specimens to environmentally coupled aging treatment include: The adhesion performance test specimens were placed in the UV accelerated weathering tester with their sides facing the UV radiation source. The placement of the adhesion performance test specimens was manually adjusted every 82.5 hours, and other sides were changed to face the ultraviolet radiation source so that each side of the adhesion performance test specimens could be uniformly subjected to ultraviolet aging. After aging, the adhesion performance test specimens were placed in a room temperature environment for 6-12 hours for curing.

5. The method for determining the dosage of solid waste powder material in asphalt pavement as described in claim 4, characterized in that: The steps to obtain test data include: Two tensile molds 2 were bonded to the upper and lower surfaces of the adhesion performance test specimen respectively using epoxy resin adhesive; According to the requirements of different load conditions, epoxy resin adhesive is evenly applied to the bottom and sides of the loading point of the tensile mold 1 that needs to be bonded, and then bonded to the corresponding loading point hole at the top of the tensile mold 2. After bonding, the tensile mold 1 is fixed in a 20KN electro-hydraulic servo fatigue testing machine. Cyclic dynamic load is applied to the morphology index specimen to simulate the repeated changes of actual traffic load. Static load is applied to the mechanical index specimen and the control specimen to test their bonding strength until the asphalt film between the adhesion performance test specimens is completely separated. The requirements for the load conditions include the first load condition, the second load condition, and the third load condition.

6. A system for determining the dosage of solid waste powder materials in asphalt pavement, based on the method for determining the dosage of solid waste powder materials in asphalt pavement according to any one of claims 1 to 5, characterized in that: It includes a slab preparation module, an adhesion performance test specimen preparation module, a multi-point loading test module, an environmental coupled aging treatment module, and an optimal doping amount determination module; The stone slab preparation module is used to prepare stone slabs of fixed size and to treat the adhesion surface of the stone slabs; The adhesion performance test specimen preparation module prepares specimens for adhesion performance testing; The environmental coupling aging treatment module performs environmental coupling aging treatment on the adhesion performance test specimens. The multi-point loading test module performs multi-point loading tests on the adhesion performance test specimen and acquires test data; The optimal dosage determination module determines the optimal dosage of solid waste powder materials for use as fillers in asphalt pavement materials based on adhesion parameters.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the steps of the method for determining the dosage of solid waste powder material in asphalt pavement as described in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the steps of the method for determining the dosage of solid waste powder material in asphalt pavement as described in any one of claims 1 to 5.

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