An asphalt-aggregate adhesion performance testing device

Abstract

The utility model relates to an asphalt - aggregate adhesion performance testing arrangement, including the pressure -resistant cavity inner layer of pressure -variable temperature treatment and the sample test block of setting in the pressure -resistant cavity inner layer, the output of pressure -resistant cavity inner layer bottom is equipped with the recovery assembly for filtering sample residue, the pressure -resistant cavity inner layer outside is provided with the weighing assembly for measuring the mass of sample test block before and after test. The utility model simple structure, reasonable in design, through the pressure -variable temperature treatment simulation underwater high -pressure environment and temperature change to the inner chamber of pressure -resistant cavity inner layer, then the weight difference of sample before and after test is determined, calculates the asphalt peeling amount, realizes the quantitative evaluation of asphalt - aggregate adhesion under underwater high -pressure environment and different temperature change in this way, solves the problem that traditional method can not simulate complex hydraulic environment, and the strong problem of subjective nature of testing, is applicable to the performance detection of hydraulic asphalt concrete material.

Description

Technical Field

[0001] This utility model relates to the field of performance testing of materials for water conservancy projects, specifically to a device for testing the adhesion performance of asphalt-aggregate. Background Technology

[0002] In water conservancy engineering construction, hydraulic asphalt concrete serves as a crucial seepage-proof structural material, with applications widely covering core components such as dam seepage barriers, canal linings, and reservoir basin seepage prevention. These structures withstand complex effects from water pressure and temperature changes over extended periods, and their durability directly impacts the safe operation and service life of the water conservancy project. The adhesion performance between asphalt and aggregate is a key factor determining the quality and durability of hydraulic asphalt concrete. As a seepage barrier, hydraulic asphalt concrete operates in an underwater environment for extended periods. If the adhesion performance between asphalt and aggregate is poor, water molecules can more easily penetrate the asphalt-aggregate interface under water load, leading to delamination, leakage, and other defects in the asphalt concrete structure, severely affecting its safe and stable operation.

[0003] Currently, commonly used methods for testing the adhesion between asphalt and aggregates include the boiling water method and the immersion water method. However, the "slight boiling" state in the boiling water method is difficult to control precisely, and different operators may interpret it differently. While the immersion water method is simple to operate, its evaluation is highly subjective, relying on manual visual inspection of asphalt peeling on the aggregate surface to assess the adhesion level, lacking quantitative analysis. Furthermore, neither of these methods can simulate the water pressure and temperature changes in a hydraulic environment, resulting in unsatisfactory correlation between the test results and actual engineering performance. Therefore, it is essential to develop a device that can accurately and efficiently test the adhesion performance of asphalt-aggregate in hydraulic asphalt concrete. Utility Model Content

[0004] This invention addresses the aforementioned problems by providing an asphalt-aggregate adhesion performance testing device to solve the issues of inaccurate testing and inability to simulate complex actual hydraulic environments in existing testing methods for hydraulic asphalt concrete.

[0005] This utility model is constructed as follows: it includes a pressure-resistant inner layer that can be pressurized and temperature-controlled, and a sample block disposed in the pressure-resistant inner layer. The output end at the bottom of the pressure-resistant inner layer is provided with a recovery component for filtering sample residues, and a weighing component for measuring the mass of the sample block before and after the test is disposed on the outer side of the pressure-resistant inner layer.

[0006] Furthermore, a mounting bracket is provided below the inner layer of the pressure-resistant cavity, and a sample suspension assembly is provided on the mounting bracket to extend into the inner layer of the pressure-resistant cavity, with multiple sample blocks suspended on the sample suspension assembly.

[0007] Furthermore, the sample suspension assembly includes a fixed rod and a suspension rod sleeved within the fixed rod. The suspension rod can move up and down along the fixed rod. The suspension rod and the fixed rod are fixed together by a rotating handle. A horizontal bar is fixed on the suspension rod. A vertical bar is provided on the side of the horizontal bar away from the suspension rod. The upper end of the vertical bar is connected to the horizontal bar via an upper adjustment knob. A detachable sealing cover is provided on the upper part of the pressure-resistant cavity. The lower end of the vertical bar passes through the detachable sealing cover and extends into the inner cavity of the inner layer of the pressure-resistant cavity. A horizontal hanging rod is provided at the lower end of the vertical bar. The vertical bar and the horizontal hanging rod are connected via a lower adjustment knob. Multiple hooks are provided on the horizontal hanging rod. A titanium wire is connected to each hook. The lower end of the titanium wire is connected to the sample block.

[0008] Furthermore, a sealing ring is provided at the connection between the detachable sealing cover and the vertical rod to achieve a sealing fit.

[0009] Furthermore, an electric heating plate is provided in the lower inner part of the inner layer of the pressure-resistant cavity.

[0010] Furthermore, the weighing assembly includes an electronic balance and a weighing platform, with the electronic balance placed on a mounting bracket and the weighing platform located at the weighing end of the electronic balance.

[0011] Furthermore, the recycling assembly includes a bottom support and a funnel mounted on the bottom support. The inlet end of the funnel is equipped with a filter screen, and the outlet end of the funnel is connected to a water tank via a drain hose.

[0012] Furthermore, a water inlet and an exhaust outlet are respectively provided on the upper two sides of the inner layer of the pressure-resistant cavity, and a bottom drain outlet is provided on the lower side of the inner layer of the pressure-resistant cavity.

[0013] Furthermore, valves are provided on the water inlet, the vent, and the bottom drain.

[0014] Furthermore, the inner cavity of the pressure-resistant cavity is provided with a temperature sensor and a pressure sensor for detecting the temperature and pressure in the inner cavity. The outer side of the inner cavity is provided with a temperature controller and a pressure controller. The temperature controller is electrically connected to the temperature sensor, and the pressure controller is electrically connected to the pressure sensor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) This device can accurately simulate the underwater high pressure environment and different temperature changes of hydraulic asphalt concrete by pressurizing and temperature changing inside the pressure-resistant chamber. It solves the problem that traditional water boiling method and water immersion method cannot simulate complex hydraulic environment, making the test environment closer to the actual engineering scenario, thus making the test results more valuable.

[0016] (2) The weight difference of the samples before and after the test is measured by the weighing component, and the amount of asphalt spalling is calculated. This enables a quantitative assessment of the adhesion between asphalt and aggregate, which changes the traditional method that relies on manual visual inspection to assess the adhesion level and is highly subjective, making the assessment results more objective and accurate.

[0017] (3) The sample hook in the sample suspension assembly can suspend multiple aggregate samples at the same time, enabling simultaneous testing of multiple samples and effectively improving test efficiency. The sample suspension assembly is a telescopic structure, and its length can be adjusted by rotating the handle, making it convenient to put or take out the sample into or out of the inner layer of the pressure-resistant chamber, and the operation is convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the weighing component structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the sample suspension assembly structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the recycling component in an embodiment of this utility model. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: Refer to Appendix Figures 1-4 As shown, an asphalt-aggregate adhesion performance testing device is provided, including a pressure-resistant inner layer 2 that can be pressurized and temperature-controlled, and a sample block disposed in the pressure-resistant inner layer. The output end at the bottom of the pressure-resistant inner layer is provided with a recycling component for filtering sample residues, and a weighing component for measuring the mass of the sample block before and after the test is disposed on the outside of the pressure-resistant inner layer.

[0021] The pressure-resistant cavity inner layer 2 mentioned above is provided with a pressure-resistant cavity outer shell 1.

[0022] The sample block in the inner layer of the pressure-resistant cavity is pressurized and heated by existing heating and pressurizing equipment. The heating equipment can be an electric heating plate, etc., and the pressurizing equipment can be a gas pressurization device, such as a booster pump.

[0023] The working process of this utility model is as follows: First, a standard aggregate sample is prepared, heated and coated with asphalt. After cooling, the initial weight m1 of the sample block 7 is weighed using an electronic balance and recorded. After weighing, the sample block is tied with titanium wire 10 and suspended on a horizontal hanging rod through sample hook 6. The valve at the bottom drain port of the inner layer 2 of the pressure-resistant cavity is closed, and an appropriate amount of water is injected into the inner layer of the pressure-resistant cavity through water inlet 11. The sample block is then placed in the water after being lifted and lowered by the sample suspension assembly. The upper and lower adjustment buttons are turned to keep the sample suspension assembly fixed, and the detachable sealing cover 24 is tightened. The temperature controller 4 and pressure controller 5 are started, and the test temperature and pressure are set to ensure that the environment inside the container reaches the set conditions and remains stable.

[0024] After maintaining the test conditions for a certain period of time, stop temperature and pressure control, open the detachable sealing cover 24, and remove the sample block through the sample suspension assembly. After drying the sample block, place it on the weighing platform, weigh the sample m2 using an electronic balance, and record the weight.

[0025] Calculate the asphalt stripping amount Δm = m1 - m2, and determine the degree of adhesion between asphalt and aggregate based on the ratio of Δm to the initial asphalt weight.

[0026] After the test, open the valve on the bottom drain outlet to drain the water from the container, and recover the detached asphalt residue through the filter screen 15 at the funnel opening.

[0027] In this embodiment of the present invention, a mounting bracket 23 is provided below the inner layer of the pressure-resistant cavity, and a sample suspension assembly is provided on the mounting bracket for extending into the inner layer of the pressure-resistant cavity, and multiple sample blocks are suspended on the sample suspension assembly.

[0028] The sample suspension assembly includes a fixed rod and a suspension rod 13 sleeved within the fixed rod. The suspension rod can move up and down along the fixed rod. The suspension rod and the fixed rod are fixed together by a rotating handle 16. A horizontal bar is fixed on the suspension rod. A vertical bar is provided on the side of the horizontal bar away from the suspension rod. The upper end of the vertical bar is connected to the horizontal bar by an upper adjustment knob 3. A detachable sealing cover 24 is provided on the upper part of the pressure-resistant cavity. The lower end of the vertical bar passes through the detachable sealing cover and extends into the inner cavity of the inner layer of the pressure-resistant cavity. A horizontal hanging rod is provided at the lower end of the vertical bar. The vertical bar and the horizontal hanging rod are connected by a lower adjustment knob 14. A plurality of hooks 6 are provided on the horizontal hanging rod. A titanium wire 10 is connected to each hook. The lower end of the titanium wire is connected to the sample block.

[0029] The aforementioned rotating handle includes a screw and a handle. The suspension rod and the fixed rod are connected by the screw, which can pass through both the suspension rod and the fixed rod for fixation. At this time, the suspension rod can be provided with multiple adjustment holes, and the fixed rod is provided with one fixing hole. The screw can pass through one fixing hole and any adjustment hole to fix the two. When the screw is loosened, the suspension rod and the fixed rod can move freely. When the screw is tightened, the suspension rod and the fixed rod are in a fixed state. Of course, the screw can also pass directly through the fixed rod and directly abut against the suspension rod to achieve fixation after the suspension rod is raised or lowered.

[0030] The upper adjustment knob here includes an upper adjustment screw and an upper knob. The upper adjustment screw can pass through the vertical bar and the horizontal bar. The lower adjustment knob includes a lower adjustment screw and a lower knob. The lower adjustment screw can also pass through the vertical bar and the horizontal hanging bar. The adjustment method of the upper and lower adjustment knobs here can be the same as the adjustment method of the rotary handle, so it will not be described in detail here.

[0031] In this embodiment of the utility model, a sealing soft ring 25 is provided at the connection between the detachable sealing cover and the vertical rod to achieve a sealing fit.

[0032] In this embodiment of the utility model, an electric heating plate 9 is provided in the lower inner part of the inner layer of the pressure-resistant cavity; the electric heating plate is prior art and will not be described in detail here.

[0033] In this embodiment of the present invention, the weighing component includes an electronic balance 20 and a weighing platform 19. The electronic balance is placed on a mounting bracket, and the weighing platform is located at the weighing end of the electronic balance.

[0034] In this embodiment of the utility model, the recycling component includes a bottom support 21 and a funnel 17 disposed on the bottom support 21. The input end of the funnel is provided with a filter screen 15, which is directly opposite the output end of the bottom drain. The output end of the funnel is connected to a water tank 18 via a drain hose 22.

[0035] In this embodiment of the invention, a water inlet 11 and an exhaust outlet 8 are respectively provided on the upper two sides of the inner layer of the pressure-resistant cavity, and a bottom drain outlet 12 is provided on the lower side of the inner layer of the pressure-resistant cavity.

[0036] In this embodiment of the utility model, valves are provided on the water inlet, the vent, and the bottom drain.

[0037] Example 2: Based on Example 1, in this embodiment of the present invention, a temperature sensor and a pressure sensor are provided in the inner cavity of the inner layer of the pressure-resistant cavity for detecting the temperature and pressure in the inner layer of the pressure-resistant cavity. A temperature controller 4 and a pressure controller 5 are provided on the outside of the inner layer of the pressure-resistant cavity. The temperature controller is electrically connected to the temperature sensor, and the pressure controller is electrically connected to the pressure sensor.

[0038] Unless otherwise stated, if any technical solution disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solution of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0039] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0040] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by casting process) (except where it is obviously impossible to use an integral forming process).

[0041] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0042] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A device for testing the adhesion performance of asphalt-aggregate, characterized in that, It includes a pressure-resistant inner layer that can be pressurized and heated, and a sample block disposed in the pressure-resistant inner layer. The output end at the bottom of the pressure-resistant inner layer is provided with a recovery component for filtering sample residues, and a weighing component is provided on the outside of the pressure-resistant inner layer for measuring the mass of the sample block before and after the test.

2. The asphalt-aggregate adhesion performance testing device according to claim 1, characterized in that, A mounting bracket is provided below the inner layer of the pressure-resistant cavity, and a sample suspension assembly is provided on the mounting bracket to extend into the inner layer of the pressure-resistant cavity, with multiple sample blocks suspended on the sample suspension assembly.

3. The asphalt-aggregate adhesion performance testing device according to claim 2, characterized in that, The sample suspension assembly includes a fixed rod and a suspension rod sleeved within the fixed rod. The suspension rod can move up and down along the fixed rod. The suspension rod and the fixed rod are fixed together by a rotating handle. A horizontal bar is fixed on the suspension rod. A vertical bar is provided on the side of the horizontal bar away from the suspension rod. The upper end of the vertical bar is connected to the horizontal bar by an upper adjustment knob. A detachable sealing cover is provided on the upper part of the pressure-resistant cavity. The lower end of the vertical bar passes through the detachable sealing cover and extends into the inner cavity of the inner layer of the pressure-resistant cavity. A horizontal hanging rod is provided at the lower end of the vertical bar. The vertical bar and the horizontal hanging rod are connected by a lower adjustment knob. Multiple hooks are provided on the horizontal hanging rod. A titanium wire is connected to each hook. The lower end of the titanium wire is connected to the sample block.

4. The asphalt-aggregate adhesion performance testing device according to claim 3, characterized in that, A sealing ring is provided at the connection between the detachable sealing cover and the vertical rod to achieve a sealing fit.

5. The asphalt-aggregate adhesion performance testing device according to any one of claims 1-4, characterized in that, An electric heating plate is provided in the lower inner part of the inner layer of the pressure-resistant cavity.

6. The asphalt-aggregate adhesion performance testing device according to claim 2, characterized in that, The weighing assembly includes an electronic balance and a weighing platform. The electronic balance is placed on a mounting bracket, and the weighing platform is located at the weighing end of the electronic balance.

7. The asphalt-aggregate adhesion performance testing device according to claim 1, characterized in that, The recycling assembly includes a bottom support and a funnel mounted on the bottom support. The inlet of the funnel is equipped with a filter screen, and the outlet of the funnel is connected to a water tank via a drain hose.

8. The asphalt-aggregate adhesion performance testing device according to claim 1, characterized in that, The pressure-resistant cavity has a water inlet and an exhaust outlet on the upper two sides of the inner layer, and a bottom drain outlet on the lower side of the inner layer.

9. The asphalt-aggregate adhesion performance testing device according to claim 8, characterized in that, Valves are installed on the water inlet, air outlet, and bottom drain outlet.

10. A testing device for asphalt-aggregate adhesion performance according to any one of claims 1-4, characterized in that, The inner cavity of the pressure-resistant cavity is equipped with a temperature sensor and a pressure sensor for detecting the temperature and pressure in the inner cavity. The outer side of the inner cavity is equipped with a temperature controller and a pressure controller. The temperature controller is electrically connected to the temperature sensor, and the pressure controller is electrically connected to the pressure sensor.

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