Method for evaluating asphalt adhesion of aggregate based on active adhesion mechanism
By using an evaluation method based on active adhesion mechanism, the dynamic adhesion process between asphalt and aggregate is simulated, and the asphalt coverage is calculated. This solves the problems of qualitative and subjective evaluation results in existing technologies, and achieves an accurate quantitative evaluation of the adhesion between asphalt and aggregate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN SEZ CONSTR GRP CO LTD
- Filing Date
- 2026-03-21
- Publication Date
- 2026-06-16
AI Technical Summary
In the existing technology, the evaluation methods for the adhesion between asphalt and aggregate are mainly based on passive adhesion mechanisms, which are difficult to simulate dynamic adhesion behavior in actual working conditions. Moreover, the evaluation results are highly subjective and qualitative, making it difficult to meet the requirements for accurate quantification.
An evaluation method based on active adhesion mechanism is adopted. By heating asphalt to coat the matrix aggregate and mixing it with the aggregate to be tested, the dynamic adhesion process is simulated. The coverage of the asphalt adhesion layer is calculated as the evaluation index. The dynamic adhesion behavior during construction is simulated using a mixing drum and elastic sheet.
It improves the accuracy and objectivity of the evaluation of asphalt-aggregate adhesion, truly reflects the dynamic adhesion process, overcomes the limitations of passive stripping, and achieves quantitative evaluation.
Smart Images
Figure CN122217847A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of road aggregate testing, and more specifically, to a method for evaluating the adhesion of aggregate to asphalt based on an active adhesion mechanism. Background Technology
[0002] In the field of road construction, the adhesion between asphalt and aggregate is directly related to the durability, water damage resistance and skid resistance of the road surface. Therefore, evaluating the adhesion between them is one of the important test steps.
[0003] In the existing technology, the main methods for evaluating the adhesion between asphalt and aggregates include the boiling water method and the immersion water method. These two methods are designed based on the "passive adhesion mechanism", which means that in the test, the asphalt is mainly peeled off by the action of external water, while ignoring the dynamic adhesion behavior between aggregates and asphalt under actual working conditions.
[0004] In actual engineering, the adhesion between asphalt and aggregate is often active. For example, during construction mixing or long-term use of the pavement, asphalt will undergo dynamic transfer and redistribution due to temperature and mechanical action. Therefore, existing evaluation methods are difficult to simulate these dynamic characteristics.
[0005] Furthermore, existing methods tend to be biased towards qualitative visual assessments of evaluation results, which are highly subjective and fail to meet the need for accurate quantification of evaluation results. Summary of the Invention
[0006] The purpose of this invention is to provide a method for evaluating the adhesion of aggregate asphalt based on the active adhesion mechanism, aiming to solve the problem of low accuracy in the evaluation of aggregate asphalt adhesion in the prior art.
[0007] This invention is implemented as follows: a method for evaluating the adhesion of aggregate asphalt based on an active adhesion mechanism, comprising the following steps: 1) Mix the matrix aggregate with heated asphalt until the heated asphalt coats the outer surface of the matrix aggregate, forming an asphalt outer layer that covers the entire outer surface of the matrix aggregate; before mixing the matrix aggregate and the heated asphalt, the heated asphalt is heated to above 150°C and kept at that temperature for at least 4 hours. 2) Mix the matrix aggregate with the asphalt outer layer with the aggregate to be tested for a set time. During the mixing process, the asphalt outer layer collides and contacts the aggregate to be tested, so that part of the heated asphalt in the asphalt outer layer is transferred to the outer surface of the aggregate to be tested, forming an asphalt adhesion layer attached to the outer surface of the aggregate to be tested. 3) Calculate the percentage of the area of the asphalt adhesion layer to the total area of the aggregate to be tested, define the percentage as the asphalt coverage rate, and use the asphalt coverage rate as the evaluation value of the aggregate asphalt adhesion.
[0008] Furthermore, in step 1), the matrix aggregate is washed and dried, and then the matrix aggregate is mixed with heated asphalt.
[0009] Furthermore, the matrix aggregate is basalt aggregate.
[0010] Furthermore, in step 2), the aggregate to be tested is basalt aggregate or steel slag aggregate.
[0011] Furthermore, in step 2), the mass of the aggregate to be tested is the same as the mass of the matrix aggregate.
[0012] Furthermore, in step 1), the particle size range of the matrix aggregate is 9.5 mm to 13.2 mm, and the particle size of the aggregate to be tested is 4.75 mm to 9.5 mm.
[0013] Furthermore, in step 2), before mixing the matrix aggregate and the aggregate to be tested, the matrix aggregate and the aggregate to be tested are kept in an oven for more than 4 hours to ensure that the temperature of the asphalt outer layer and the aggregate to be tested is higher than 150°C before mixing the matrix aggregate and the aggregate to be tested.
[0014] Furthermore, in step 1), before the matrix aggregate is mixed with the heated asphalt, the heated asphalt is sprayed onto the matrix aggregate to form multiple block-shaped asphalt blocks on the surface of the matrix aggregate, and multiple spacer grooves are formed on the surface of the matrix aggregate between adjacent asphalt blocks. Once the asphalt blocks are immobilized, the matrix aggregate is mixed with heated asphalt until the heated asphalt completely covers the outside of the matrix aggregate. The outer layer of asphalt fills the spacer grooves and encapsulates multiple asphalt blocks.
[0015] Furthermore, in step 3), calculating the percentage of the area of the asphalt adhesion layer to the total area of the aggregate to be tested includes the following steps: 3.1) Use a camera to acquire the original image of the aggregate to be tested that has not been mixed with the matrix aggregate; 3.2) By identifying the edge contour lines of the aggregate to be tested after it has been mixed with the matrix aggregate, the pixel area corresponding to the aggregate to be tested is determined; 3.3) Binarize the pixel area to identify the blank area of the area on the aggregate to be tested that is not covered by the asphalt adhesion layer and the total area of the aggregate to be tested; 3.4) The percentage of the asphalt adhesion layer's area relative to the total area of the aggregate being tested can be obtained using the following formula: Percentage = (1 - (A(b) / A(a))) × 100% A(b) is the blank area, and A(a) is the total area.
[0016] Furthermore, in step 2), the matrix aggregate and the aggregate to be tested are mixed in a horizontally eccentrically rotating mixing drum; the mixing drum is arranged horizontally and has a horizontally arranged mixing chamber; the mixing chamber is provided with a plurality of reciprocating elastic deformation plates, and the plurality of elastic plates are arranged at intervals around the outer periphery of the central axis of the mixing drum. The elastic sheet is arranged in a staggered parallel manner along the central axis of the mixing drum, and the two ends of the elastic sheet are respectively connected to the ends of the mixing drum; along the length direction of the elastic sheet, the elastic sheet is arranged in multiple curved segments; the elastic sheet has multiple straight segments extending in a straight line, and a rotating drum that rotates around the straight segment is sleeved on the straight segment; the multiple straight segments are arranged at intervals along the length direction of the elastic sheet. In step 2), after the matrix aggregate and the aggregate to be tested are mixed and placed in the mixing chamber, the mixing drum rotates horizontally eccentrically, and the matrix aggregate and the aggregate to be tested rotate synchronously with the mixing drum to perform rotational mixing; the elastic sheet is subjected to impact and reciprocating elastic deformation, and multiple elastic sheets perform elastic scraping and mixing of the matrix aggregate and the aggregate to be tested; the rotating drum is subjected to the impact of the matrix aggregate and the aggregate to be tested, and rotates around the straight section to buffer the collision between the matrix aggregate and the aggregate to be tested.
[0017] Compared with existing technologies, the aggregate-asphalt adhesion evaluation method based on active adhesion mechanism provided by this invention simulates the dynamic adhesion behavior of aggregate and asphalt under actual working conditions, making the evaluation of aggregate-asphalt adhesion accurate and reliable. Specifically, it includes the following points: First, by wrapping the matrix aggregate with heated asphalt and keeping it at high temperature, the fluidity and uniformity of the asphalt were ensured, providing stable test conditions for the subsequent dynamic adhesion process, thereby reducing errors caused by unstrict test conditions.
[0018] Secondly, the collision and contact between the matrix aggregate and the aggregate to be tested causes the asphalt to actively transfer and form an asphalt adhesion layer. This dynamic transfer of the asphalt outer layer truly simulates the dynamic adhesion process during construction and use, overcoming the limitation that passive peeling alone cannot reflect dynamic adhesion.
[0019] Finally, a quantitative index of asphalt coverage was introduced to replace qualitative visual inspection, thereby improving the objectivity and accuracy of the evaluation and meeting the need for accurate quantification of the evaluation results of aggregate asphalt adhesion. Attached Figure Description
[0020] Figure 1 This is a flowchart illustrating the method for evaluating the adhesion of aggregate asphalt based on the active adhesion mechanism provided by the present invention. Figure 2This is a simplified schematic diagram of the mixing process between the matrix aggregate and the aggregate to be tested provided by the present invention; Figure 3 This is a cross-sectional schematic diagram of the mixing cylinder provided by the present invention; Figure 4 This is a schematic diagram of the structure of the elastic sheet provided by the present invention; In the diagram: matrix aggregate 100, heated asphalt 101, asphalt outer layer 102; The aggregate to be tested is 200, and the asphalt adhesion layer is 201. Mixing drum 300, mixing chamber 301, elastic sheet 302, straight section 303, central axis 304, rotating drum 305. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0022] The implementation of the present invention will be described in detail below with reference to specific embodiments.
[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0024] Reference Figure 1-4 The image shows a preferred embodiment of the present invention.
[0025] The method for evaluating the adhesion of aggregate asphalt based on the active adhesion mechanism includes the following steps: 1) Mix the matrix aggregate 100 with heated asphalt 101 until the heated asphalt 101 coats the outer surface of the matrix aggregate 100, forming an asphalt outer layer 102. The asphalt outer layer 102 covers the entire outer surface of the matrix aggregate 100. Before mixing the matrix aggregate 100 and the heated asphalt 101, the heated asphalt 101 is heated to above 150°C and kept at that temperature for at least 4 hours. 2) Mix the matrix aggregate 100 with the asphalt outer layer 102 with the aggregate to be tested 200 for a set time. During the mixing process, the asphalt outer layer 102 and the aggregate to be tested 200 collide and come into contact, so that part of the heated asphalt 101 of the asphalt outer layer 102 is transferred to the outer surface of the aggregate to be tested 200, forming an asphalt adhesion layer 201 attached to the outer surface of the aggregate to be tested 200. 3) Calculate the percentage of the area of the asphalt adhesion layer 201 to the total area of the aggregate 200 to be tested. Define the percentage as the asphalt coverage rate and use the asphalt coverage rate as the evaluation value of the aggregate asphalt adhesion.
[0026] The above-mentioned method for evaluating aggregate-asphalt adhesion based on active adhesion mechanism simulates the dynamic adhesion behavior of aggregate and asphalt under actual working conditions, making the evaluation of aggregate-asphalt adhesion accurate and reliable. Specifically, it includes the following points: First, by wrapping the matrix aggregate 100 with heated asphalt 101 and keeping it at high temperature, the fluidity and uniformity of the asphalt were ensured, providing stable test conditions for the subsequent dynamic adhesion process, thereby reducing errors caused by unstrict test conditions.
[0027] Secondly, the collision and contact between the matrix aggregate 100 and the aggregate to be tested 200 causes the asphalt to actively transfer and form an asphalt adhesion layer 201. This dynamic transfer of the asphalt outer layer 102 truly simulates the dynamic adhesion process during construction and use, overcoming the limitation that passive peeling alone cannot reflect dynamic adhesion.
[0028] Finally, a quantitative index of asphalt coverage was introduced to replace qualitative visual inspection, thereby improving the objectivity and accuracy of the evaluation and meeting the need for accurate quantification of the evaluation results of aggregate asphalt adhesion.
[0029] In this embodiment, in step 1), the matrix aggregate 100 is washed and dried, and then the matrix aggregate 100 is mixed with heated asphalt 101.
[0030] By cleaning and drying the matrix aggregate 100, surface impurities and moisture can be removed, ensuring that when the aggregate is mixed with asphalt, the asphalt can evenly coat the outer surface of the aggregate, forming a good asphalt outer layer 102. This provides a prerequisite for the contact between the aggregate 200 to be tested and the asphalt outer layer 102, and helps to improve the accuracy of the aggregate asphalt adhesion evaluation.
[0031] In this embodiment, the matrix aggregate 100 is basalt aggregate; because basalt aggregate has high strength and good durability, its surface roughness is large, and its adhesion to asphalt is good. Therefore, basalt is selected as the matrix aggregate 100, which can provide a good adhesion base for heating asphalt 101, so that the outer layer of asphalt 102 can more tightly wrap the aggregate and form a stable structure.
[0032] Moreover, in actual road engineering, basalt aggregate is often used in road sections with high requirements for pavement performance, such as the surface layer of highways. In this embodiment, the characteristics of basalt aggregate are used to simulate the combination of actual road materials, making the evaluation method more targeted and practical, and making the evaluation of the adhesion performance between aggregate and asphalt more accurate.
[0033] In this embodiment, in step 2), the aggregate to be tested 200 is either basalt aggregate or steel slag aggregate. Although both are commonly used aggregate types in road construction, their surface properties and adhesion to asphalt differ: basalt aggregate has a rougher surface and a stronger affinity with asphalt; steel slag aggregate has a relatively smooth surface and contains certain active ingredients, and its adhesion to asphalt needs further evaluation.
[0034] In this embodiment, the adhesion of the aggregate 200 to be tested is evaluated, which can help to understand the adhesion characteristics of the two aggregates under different conditions and provide a basis for rational material selection. For example, in some cost-sensitive projects, if the adhesion performance of steel slag aggregate meets the requirements, it can be used as a substitute for basalt aggregate to reduce construction costs.
[0035] In this embodiment, in step 2), the mass of the aggregate to be tested 200 is the same as the mass of the matrix aggregate 100; this is to ensure the consistency of the test conditions and reduce test errors caused by mass differences.
[0036] During the mixing process, when aggregates of the same mass interact with asphalt, the adhesion performance between the aggregates and asphalt can be more accurately reflected, making the evaluation results more comparable.
[0037] In this embodiment, in step 1), the particle size range of the matrix aggregate 100 is 9.5mm~13.2mm, and the particle size of the aggregate to be tested 200 is 4.75mm~9.5mm.
[0038] Thus, based on the precise requirements of the experiment and considerations for practical application, the matrix aggregate 100 has a larger particle size, which enables it to provide support for the outer asphalt layer 102 during the mixing process, simulating the load-bearing role of aggregates in actual roads; while the test aggregate 200 has a smaller particle size, which allows the test aggregate 200 to be closer to the particle size that is in direct contact with asphalt in actual roads, thereby more realistically reflecting its adhesion characteristics in the experiment.
[0039] In addition, the difference in particle size also facilitates the observation and analysis of experimental results; the larger matrix aggregate 100 and the smaller test aggregate 200 will form a sharp contrast after mixing, making the formation process of the asphalt adhesion layer 201 more intuitive and easier to distinguish, thus improving the operability of the test and the reliability of the results.
[0040] In this embodiment, in step 2), before mixing the matrix aggregate 100 and the aggregate to be tested 200, the matrix aggregate 100 and the aggregate to be tested 200 are kept in an oven for more than 4 hours so that the temperature of the asphalt outer layer 102 and the aggregate to be tested 200 is higher than 150°C, and then the matrix aggregate 100 and the aggregate to be tested 200 are mixed.
[0041] In the actual mixing process, the heating temperature of the asphalt outer layer 102 and the aggregate to be tested 200 is one of the key factors affecting the mixing quality. If the temperature is too low, the asphalt outer layer 102 has poor fluidity and is difficult to dynamically transfer to the aggregate to be tested 200; if the temperature is too high, it will cause the asphalt outer layer 102 to age and affect its adhesion performance.
[0042] By controlling the temperature, the optimal mixing state was achieved, which improved the accuracy and authenticity of the aggregate asphalt adhesion evaluation.
[0043] In this embodiment, in step 1), before the matrix aggregate 100 is mixed with the heated asphalt 101, the heated asphalt 101 is sprayed onto the matrix aggregate 100 so that multiple block-shaped asphalt blocks are formed on the surface of the matrix aggregate 100 and multiple spacer grooves are formed on the surface of the matrix aggregate 100 between adjacent asphalt blocks. Once the asphalt blocks are fixed, the matrix aggregate 100 is mixed with heated asphalt 101 until the heated asphalt 101 covers the entire exterior of the matrix aggregate 100. The outer asphalt layer 102 fills the spacer groove and covers multiple asphalt blocks.
[0044] During the experiment, the matrix aggregate 100 was used as a carrier for the asphalt outer layer 102, which allowed the aggregate to be tested 200 to only contact the asphalt outer layer 102. This buffered the contact between the asphalt outer layer 102 and the aggregate to be tested 200, slowed down the contact speed between the asphalt outer layer 102 and the aggregate to be tested 200, and highlighted the behavior of the aggregate to be tested 200 actively "capturing" the heated asphalt 101 from the surface of the matrix aggregate 100.
[0045] Asphalt blocks are arranged here to form a gap. The outer asphalt layer 102 fills the gap, which can further buffer the contact between the aggregate to be tested 200 and the outer asphalt layer 102. The gap provides a buffer space for the flow and filling of asphalt, further slowing down the contact speed between the outer asphalt layer 102 and the aggregate to be tested 200.
[0046] In this embodiment, step 3) involves calculating the percentage of the area of the asphalt adhesion layer 201 relative to the total area of the aggregate 200 to be tested, which includes the following steps: 3.1) Use a camera to acquire the original image of the aggregate 200 to be tested that has not been mixed with the matrix aggregate 100; 3.2) By identifying the edge contour lines of the aggregate to be tested 200 after it is mixed with the matrix aggregate 100, the pixel area corresponding to the aggregate to be tested 200 is determined; 3.3) Binarize the pixel area to identify the blank area of the area on the aggregate 200 that is not covered by the asphalt adhesion layer 201 and the total area of the aggregate 200. 3.4) The percentage of the area of the asphalt adhesion layer 201 relative to the total area of the aggregate 200 to be tested is obtained using the following formula: Percentage = (1 - (A(b) / A(a))) × 100% A(b) is the blank area, and A(a) is the total area.
[0047] In this process, the larger the percentage of the area of the asphalt adhesion layer 201 to the total area of the aggregate 200 to be tested, the stronger the ability of the aggregate 200 to actively capture asphalt and the better its active adhesion performance.
[0048] This kind of indexing not only quantifies adhesion but also avoids the subjective errors of manual visual inspection, making the evaluation of aggregate asphalt adhesion more scientific and accurate.
[0049] It should be noted that, in order to reduce the error between the adhesion situation in the two-dimensional image and the actual situation, the calculation method in this embodiment uses the average value of multiple sets of experimental data as the final coverage result.
[0050] Specifically, since the aggregate 200 to be tested may be placed in different ways during the mixing process, the performance in a single image is insufficient to fully reflect the actual adhesion. However, by taking the average value, random errors caused by placement differences can be eliminated, improving the stability of the data and the reliability of the results, thereby more realistically reflecting the adhesion characteristics of the aggregate 200 to be tested.
[0051] The binarization process mentioned in this embodiment is an image processing technique that simplifies the pixel values of an image into two states, usually 0 or 1, corresponding to black or white.
[0052] In the calculation method of this embodiment, the function of binarization is to clearly distinguish the surface of the aggregate 200 to be tested from the area without asphalt, and to remove background noise, so that the subsequent calculation steps and results are more accurate and reliable.
[0053] In this embodiment, in step 2), the matrix aggregate 100 and the aggregate to be tested 200 are mixed in a horizontally eccentrically rotating mixing drum 300; the mixing drum 300 is arranged horizontally and has a horizontally arranged mixing chamber 301; the mixing chamber 301 is provided with a plurality of reciprocating elastic plates 302, and the plurality of elastic plates 302 are arranged at intervals around the outer periphery of the central axis 304 of the mixing drum 300; The elastic sheet 302 is arranged in parallel with the central axis 304 of the mixing drum 300, and the two ends of the elastic sheet 302 are respectively connected to the ends of the mixing drum 300. Along the length direction of the elastic sheet 302, the elastic sheet 302 is arranged in multiple curved segments. The elastic sheet 302 has multiple straight segments 303 extending in a straight line. A rotating drum 305 that rotates around the straight segment 303 is sleeved on the straight segment 303. The multiple straight segments 303 are arranged at intervals along the length direction of the elastic sheet 302. In step 2), after the matrix aggregate 100 and the aggregate to be tested 200 are mixed and placed in the mixing chamber 301, the mixing drum 300 rotates horizontally eccentrically. The matrix aggregate 100 and the aggregate to be tested 200 rotate synchronously with the mixing drum 300 to perform rotational mixing. The elastic sheet 302 is subjected to impact and reciprocating elastic deformation. Multiple elastic sheets 302 perform elastic scraping and mixing of the matrix aggregate 100 and the aggregate to be tested 200. The rotating drum 305 is subjected to the impact of the matrix aggregate 100 and the aggregate to be tested 200 and rotates around the straight section 303 to buffer the collision between the matrix aggregate 100 and the aggregate to be tested 200.
[0054] Among them, the reciprocating elastic deformation of the elastic sheet 302 can simulate the dynamic interaction between aggregate and asphalt during construction, so that the asphalt can be more evenly coated on the surface of the aggregate, thereby improving the accuracy of the adhesion evaluation; while the buffering effect of the rotating cylinder 305 can avoid excessive crushing of the aggregate, ensuring that the evaluation results can truly reflect the adhesion performance between the aggregate and the asphalt.
[0055] In this way, through the synergistic effect of the elastic sheet 302 and the rotating drum 305, not only is the uniformity and efficiency of mixing enhanced, but also the direct collision between aggregates is buffered, reducing the mass loss of aggregates and protecting the integrity of aggregates.
[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism, characterized in that, Includes the following steps: 1) Mix the matrix aggregate with heated asphalt until the heated asphalt coats the outer surface of the matrix aggregate, forming an asphalt outer layer that covers the entire outer surface of the matrix aggregate; before mixing the matrix aggregate and the heated asphalt, the heated asphalt is heated to above 150°C and kept at that temperature for at least 4 hours. 2) Mix the matrix aggregate with the asphalt outer layer with the aggregate to be tested for a set time. During the mixing process, the asphalt outer layer collides and contacts the aggregate to be tested, so that part of the heated asphalt in the asphalt outer layer is transferred to the outer surface of the aggregate to be tested, forming an asphalt adhesion layer attached to the outer surface of the aggregate to be tested. 3) Calculate the percentage of the area of the asphalt adhesion layer to the total area of the aggregate to be tested, define the percentage as the asphalt coverage rate, and use the asphalt coverage rate as the evaluation value of the aggregate asphalt adhesion.
2. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 1), the matrix aggregate is washed and dried, and then the matrix aggregate is mixed with heated asphalt.
3. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, The matrix aggregate is basalt aggregate.
4. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 2), the aggregate to be tested is basalt aggregate or steel slag aggregate.
5. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 2), the mass of the aggregate to be tested is the same as the mass of the matrix aggregate.
6. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 1), the particle size range of the matrix aggregate is 9.5 mm to 13.2 mm, and the particle size of the aggregate to be tested is 4.75 mm to 9.5 mm.
7. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 2), before mixing the matrix aggregate and the aggregate to be tested, the matrix aggregate and the aggregate to be tested are kept in an oven for more than 4 hours to ensure that the temperature of the asphalt outer layer and the aggregate to be tested is higher than 150°C before mixing the matrix aggregate and the aggregate to be tested.
8. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 1), before the matrix aggregate is mixed with heated asphalt, the heated asphalt is sprayed onto the matrix aggregate to form multiple block-shaped asphalt blocks on the surface of the matrix aggregate, and multiple spacer grooves are formed on the surface of the matrix aggregate between adjacent asphalt blocks. Once the asphalt blocks are immobilized, the matrix aggregate is mixed with heated asphalt until the heated asphalt completely covers the outside of the matrix aggregate. The outer layer of asphalt fills the spacer grooves and encapsulates multiple asphalt blocks.
9. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in claim 1, characterized in that, In step 3), calculating the percentage of the area of the asphalt adhesion layer to the total area of the aggregate to be tested includes the following steps: 3.1) Use a camera to acquire the original image of the aggregate to be tested that has not been mixed with the matrix aggregate; 3.2) By identifying the edge contour lines of the aggregate to be tested after it has been mixed with the matrix aggregate, the pixel area corresponding to the aggregate to be tested is determined; 3.3) Binarize the pixel area to identify the blank area of the area on the aggregate to be tested that is not covered by the asphalt adhesion layer and the total area of the aggregate to be tested; 3.4) The percentage of the asphalt adhesion layer's area relative to the total area of the aggregate being tested can be obtained using the following formula: Percentage = (1 - (A(b) / A(a))) × 100% A(b) is the blank area, and A(a) is the total area.
10. The method for evaluating the adhesion of aggregate asphalt based on active adhesion mechanism as described in any one of claims 1-9, characterized in that, In step 2), the matrix aggregate and the aggregate to be tested are mixed in a horizontally eccentrically rotating mixing drum; the mixing drum is arranged horizontally and has a horizontally arranged mixing chamber; the mixing chamber is provided with a plurality of reciprocating elastic deformation plates, and the plurality of elastic plates are arranged at intervals around the outer periphery of the central axis of the mixing drum. The elastic sheet is arranged in a staggered parallel manner along the central axis of the mixing drum, and the two ends of the elastic sheet are respectively connected to the ends of the mixing drum; along the length direction of the elastic sheet, the elastic sheet is arranged in multiple curved segments; the elastic sheet has multiple straight segments extending in a straight line, and a rotating drum that rotates around the straight segment is sleeved on the straight segment; the multiple straight segments are arranged at intervals along the length direction of the elastic sheet. In step 2), after the matrix aggregate and the aggregate to be tested are mixed and placed in the mixing chamber, the mixing drum rotates horizontally eccentrically, and the matrix aggregate and the aggregate to be tested rotate synchronously with the mixing drum to perform rotational mixing; the elastic sheet is subjected to impact and reciprocating elastic deformation, and multiple elastic sheets perform elastic scraping and mixing of the matrix aggregate and the aggregate to be tested; the rotating drum is subjected to the impact of the matrix aggregate and the aggregate to be tested, and rotates around the straight section to buffer the collision between the matrix aggregate and the aggregate to be tested.