New-old asphalt double-layer composite sample preparation device in dynamic shear rheological test

Abstract

The utility model discloses a new-old asphalt double-layer composite sample preparation device in a dynamic shear rheological test, which relates to the technical field of asphalt tests and comprises a base, and two moving plates are slidably arranged on the top surface of the middle of the base; a mold buckle is arranged on the movable plate; the movable plates are rotationally connected with the movable plates, when the two movable plates are in a horizontal state, the other ends of the two movable plates are connected, and when the two movable plates are in a vertical state, the positions of the molds on the two movable plates correspond to each other; a support is arranged on the base, and the dropping funnel is arranged on the support. According to the device disclosed by the utility model, when the movable plate is horizontally fixed, the thickness and the flatness of a sample are ensured by controlling the amount of asphalt dripped into the mold; when the movable plate is vertically attached to the movable plate, the movable plate is pushed through the handle, then the mold on the movable plate is driven to horizontally move along the sliding rail on the base, accurate sample overlapping is completed, it is guaranteed that the thickness of a test piece is accurate, the surface of the test piece is smooth and observable, and the device is simpler in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt testing, in particular to a device for preparing a new-old asphalt double-layer composite sample in a dynamic shear rheology test. Background Art

[0002] At present, highway construction has entered a period of comprehensive major and medium-sized repairs and maintenance. Promoting the recycling and high-value of waste asphalt pavement materials generated during the maintenance process is the main task of high-quality green development in the transportation industry. Affected by the aging and hardening of asphalt, the performance of waste asphalt pavement materials has been greatly attenuated. By adding new asphalt and regeneration agent to the aged asphalt adhering to the surface of the old aggregate, the new asphalt can diffuse into the interior of the aged asphalt and mix, achieving miscible regeneration of the two, and then restoring the road performance of the waste asphalt pavement materials. The degree of activation and mixing of the aged asphalt on the surface of the waste asphalt is the key to affecting the road performance of the recycled asphalt mixture. The rheological properties of the samples obtained with different mixing degrees will show obvious differences. Whether in engineering applications or scientific research, high-precision testing equipment is used to explore the miscibility of the two, and there are better experimental requirements for the samples.

[0003] In the field of road asphalt materials, the use of a dynamic shear rheometer can intuitively characterize the changing laws of the mixing behavior of new and old asphalt. In order to test the miscibility of new and old asphalt, it is necessary to prepare a double-layer contact specimen of new asphalt and aged asphalt, but the current specimen preparation method cannot directly form a new-old asphalt double-layer specimen suitable for dynamic shear rheometer testing, and there are defects such as cumbersome operating steps, uneven specimen surface, and manual sample overlap misalignment that are difficult to meet experimental requirements, which can easily lead to errors in test data. At present, there is no new-old asphalt double-layer specimen molding device for dynamic shear rheometer testing. The specimens prepared by the existing method are difficult to meet the experimental standards and require repeated rework, thereby reducing the accuracy of the specimen test and the efficiency of the test. Summary of the invention

[0004] The utility model aims to solve the above-mentioned problems of the prior art and provide a device for preparing a new-old asphalt double-layer composite sample in a dynamic shear rheology test, which is convenient for forming a double-layer asphalt sample and ensures the accuracy of the sample thickness and the flatness of the surface.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a device for preparing a double-layer composite sample of new and old asphalt in a dynamic shear rheology test, comprising a base, a movable plate, an active plate, a dropping funnel and a bracket; two movable plates are slidably arranged on the middle top surface of the base; a mold buckle is arranged on the movable plate, and the mold buckle is used to fix the mold; the top of each movable plate is rotatably connected to one end of a movable plate, and the two movable plates are connected to each other at the other ends when the two movable plates are in a horizontal state, and the positions of the molds on the two movable plates correspond when the two movable plates are in a vertical state; one bracket is arranged on each end of the base, the dropping funnel is arranged on the bracket, and the dropping funnel is located directly above the mold buckle.

[0007] Optionally, the other ends of the two movable plates are complementary stepped structures, and a magnetic strip is provided on the stepped structure.

[0008] Optionally, the base is a concave structure; a slide rail is provided on the top surface of the middle recessed area of ​​the base, and the movable plate is slidably arranged on the slide rail.

[0009] Optionally, the base is a concave structure; handles are provided at both ends of the base, and the handles pass through the ends of the base and are connected to the movable plate.

[0010] Optionally, the movable plate is connected to the moving plate via a hinge.

[0011] Optionally, a valve is provided at the bottom of the dropping funnel.

[0012] Optionally, the dropping funnel is provided with scale lines.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] In the new and old asphalt double-layer composite sample preparation device in the dynamic shear rheology test of the utility model, when the movable plate is fixed horizontally, the mold is placed in the mold buckle, and the amount of asphalt dripped into the mold is controlled to ensure the accuracy of the sample thickness and the flatness of the surface; when the movable plate is vertically attached to the moving plate, the moving plate is pushed by the handle, thereby driving the mold on the movable plate to move horizontally along the slide rail on the base to complete the accurate superposition of the sample. The utility model has the advantages of being easy to form a double-layer test piece of recycled asphalt, ensuring the accurate thickness of the test piece, and the surface is flat and observable, and the device structure is also simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of a device for preparing a new-old asphalt double-layer composite sample in a dynamic shear rheology test provided by an embodiment of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the magnetic strip of the movable plate connecting device in the preparation device of the new-old asphalt double-layer composite sample in a dynamic shear rheology test.

[0018] Figure 3 for Figure 1 Schematic diagram of the structure in which the movable plate is flipped down and fitted with the moving plate in a device for preparing a new-old asphalt double-layer composite sample in a dynamic shear rheology test.

[0019] Figure 4 for Figure 1 Schematic diagram of the working process of a new-old asphalt double-layer composite specimen preparation device in a dynamic shear rheology test, in which a handle pushes the movable plate to drive the movable plate to fit together.

[0020] Figure 5 for Figure 1 Schematic diagram of the final overlap of the mold in a device for preparing a new-old asphalt double-layer composite specimen in a dynamic shear rheology test.

[0021] Figure 6 for Figure 1 Cross-sectional view of the handle-bracket-base of a device for preparing a new-old asphalt double-layer composite specimen in a dynamic shear rheology test.

[0022] Figure 7 for Figure 1 Schematic diagram of the scale lines on the dropping funnel of a device for preparing a new-old asphalt double-layer composite sample in a dynamic shear rheology test.

[0023] Explanation of the accompanying reference numerals: 1. dropping funnel; 2. bracket; 3. mold buckle; 4. hinge; 5. movable plate; 6. slide rail; 7. moving plate; 8. base; 9. handle; 10. valve; 11. magnetic strip. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model aims to provide a new-old asphalt double-layer composite sample preparation device in a dynamic shear rheology test to solve the problems existing in the prior art, facilitate the molding of double-layer asphalt samples, and ensure the accuracy of sample thickness and surface flatness.

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figures 1 to 7 As shown, this embodiment provides a new-old asphalt double-layer composite specimen preparation device in a dynamic shear rheology test, including a base 8, a movable plate 7, an active plate 5, a dropping funnel 1 and a bracket 2; two movable plates 7 are slidably arranged on the middle top surface of the base 8; a mold buckle 3 is arranged on the movable plate 5, and the mold buckle 3 is used to fix the mold; the top of each movable plate 7 is rotatably connected to one end of a movable plate 5, and the other ends of the two movable plates 5 are connected when the two movable plates 5 are in a horizontal state, and the positions of the molds on the two movable plates 5 correspond when the two movable plates 5 are in a vertical state; a bracket 2 is respectively arranged at both ends of the base 8, and the dropping funnel 1 is arranged on the bracket 2, and the dropping funnel 1 is located directly above the mold buckle 3.

[0028] In this specific embodiment, the other ends of the two movable plates 5 are complementary stepped structures, and the stepped structures are provided with magnetic strips 11. When the movable plates 5 are in a horizontal state, the magnetic strips 11 are mutually attracted to each other, so that the two movable plates 5 can be kept horizontally fixed.

[0029] The base 8 is a concave structure; a slide rail 6 is provided on the top surface of the concave area in the middle of the base 8, and the movable plate 7 is slidably arranged on the slide rail 6. Handles 9 are provided at both ends of the base 8, and the handles 9 pass through the ends of the base 8 and are connected to the movable plate 7. By pushing the handles 9, the movable plate 7 and the movable plate 5 in the vertical state can be driven to move horizontally along the slide rail 6, thereby realizing mold fitting and preventing misalignment caused by misalignment during the pushing process.

[0030] The movable plate 5 is connected to the moving plate 7 via a hinge 4, so as to facilitate the flipping of the movable plate 5 and realize the conversion of the movable plate 5 between a horizontal state and a vertical state.

[0031] A valve 10 is provided at the bottom of the dropping funnel 1 for controlling the opening and closing of the funnel dripping liquid.

[0032] The dropping funnel 1 is provided with graduation lines, so that the amount of asphalt dripped into the mold can be controlled by observing the graduation lines and controlling the valve 10 .

[0033] In this embodiment, the center of the bracket 2 is located directly above the mold buckle 3. After the mold is installed in place, the dripping funnel 1 can be located directly above the mold. When the movable plate 5 is in a horizontal state, dripping can be performed; the movable plate 5 is flipped to a vertical state and overlapped with the movable plate 7. By pushing the handle 9, the movable plate 7 can be moved toward the middle along the slide rail 6 on the base 8, driving the movable plate 5 until the overlap of the test is achieved. In other words, on the asphalt specimen molding device of this embodiment, the movable plate 5 can be fixed horizontally to form 1 to 2 asphalt specimens at a time according to the experimental needs, and the movable plate 5 can be flipped down according to the experimental needs, and the handle 9 can be pushed to achieve the bonding of the double-layer mold, mix the new and old asphalt, and obtain the prepared asphalt specimen.

[0034] like Figure 7 There are blade scale lines marked on the dropping funnel 1. When the valve 10 is closed, add high-temperature flowing asphalt to the scale line in the funnel, and then open the valve 10. The added asphalt will flow into the mold along the long neck of the funnel. The liquid level can just fill the mold groove and remain level with the mold surface.

[0035] In summary, the utility model is a device for preparing a double-layer composite sample of new and old asphalt in a dynamic shear rheology test, which is convenient for molding a double-layer specimen of recycled asphalt and meets the requirements of dynamic shear rheology test samples. It is a device for preparing a double-layer composite sample of new and old asphalt in a dynamic shear rheology test.

[0036] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A device for preparing new-old asphalt double-layer composite samples in dynamic shear rheology test, characterized in that: It includes a base, a movable plate, an active plate, a dropping funnel and a bracket; two movable plates are slidably arranged on the middle top surface of the base; a mold buckle is arranged on the movable plate, and the mold buckle is used to fix the mold; the top of each movable plate is rotatably connected to one end of a movable plate, and the two movable plates are connected to each other at the other ends when the two movable plates are in a horizontal state, and the positions of the molds on the two movable plates correspond when the two movable plates are in a vertical state; one bracket is arranged on each end of the base, the dropping funnel is arranged on the bracket, and the dropping funnel is located directly above the mold buckle.

2. The device for preparing new-old asphalt double-layer composite specimens in dynamic shear rheology test according to claim 1, characterized in that: The other ends of the two movable plates are complementary stepped structures, and magnetic strips are arranged on the stepped structures.

3. The device for preparing new-old asphalt double-layer composite specimens in dynamic shear rheology test according to claim 1, characterized in that: The base is a concave structure; a slide rail is arranged on the top surface of the concave area in the middle of the base, and the movable plate is slidably arranged on the slide rail.

4. The device for preparing new-old asphalt double-layer composite specimens in dynamic shear rheology test according to claim 1, characterized in that: The base is a concave structure; handles are arranged at both ends of the base, and the handles pass through the ends of the base and are connected to the movable plate.

5. The device for preparing new-old asphalt double-layer composite sample in dynamic shear rheology test according to claim 1, characterized in that: The movable plate is connected to the moving plate via a hinge.

6. The device for preparing new-old asphalt double-layer composite specimens in dynamic shear rheology test according to claim 1, characterized in that: A valve is arranged at the bottom of the dropping funnel.

7. The device for preparing new-old asphalt double-layer composite specimens in dynamic shear rheology test according to claim 1, characterized in that: The dropping funnel is provided with scale lines.

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