Asphalt viscosity and toughness detection device

Abstract

The utility model discloses an asphalt viscosity and toughness detection device which comprises a sample container used for forming a containing space for pouring an asphalt sample; the stretching assembly is arranged in the sample container and is used for being in contact with the asphalt sample for detection; and the bracket is arranged at the top of the sample container and is used for mounting the stretching piece in the sample container. According to the utility model, the adhesion effect between an asphalt sample and the drawing detection head can be effectively enhanced, so that the drawing detection head is prevented from being pulled in the test process, the viscosity and toughness value of asphalt can be more accurately measured, the modification effect of the asphalt can be evaluated, and meanwhile, the sample container can adapt to various environments by additionally arranging the positioning hole in the bottom of the sample container, so that the test efficiency is improved. And the viscosity and toughness can be measured on site.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt detection, in particular to a portable asphalt viscosity and toughness detection device. Background Art

[0002] Due to the continuous growth of asphalt pavements and the increasing requirements for various performance aspects such as the strength of asphalt pavements, the requirements for asphalt are also increasing. Currently, there are many types of polymer-modified asphalt, and it is crucial to evaluate its modification effect. The results of the asphalt viscosity and toughness test are an important indicator for evaluating the modification effect of asphalt. Viscosity and toughness can reflect the impact strength of the material and the adhesion strength with stone materials.

[0003] In the prior art, when using the original tensile hemispherical head of the viscosity and toughness tester for measurement, the tensile hemispherical head will be pulled out from the sample. This is because the adhesion force between the asphalt and the tensile hemispherical head is less than the cohesive force between the asphalts, resulting in the inability to accurately quantify the viscosity and toughness of the modified asphalt, thus affecting the accuracy of the evaluation of the modification effect of asphalt. At the same time, most of the existing detection devices are suitable for laboratories and cannot be used

[0004] Therefore, there is an urgent need to develop an asphalt viscosity and toughness detection device that can enhance the adhesion between the asphalt and the tensile hemispherical head, solve the problem of pulling out caused by the weak adhesion between the asphalt and the tensile hemispherical head, improve the accuracy of the asphalt viscosity and toughness results, and can also adapt to various detection environments and measure the viscosity and toughness of asphalt on-site. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide an asphalt viscosity and toughness detection device that can enhance the adhesion between the asphalt and the tensile hemispherical head, solve the problem of pulling out caused by the weak adhesion between the asphalt and the tensile hemispherical head, improve the accuracy of the asphalt viscosity and toughness results, and can also adapt to various detection environments and measure the viscosity and toughness of asphalt on-site.

[0006] The asphalt viscosity and toughness detection device of the utility model includes:

[0007] A sample container for forming a containing space to pour the asphalt sample;

[0008] A pulling component with a pulling detection head that can be driven to move up and down in the sample container for contacting the asphalt sample and pulling to complete the viscosity and toughness detection.

[0009] Further, the bottom surface of the pulling detection head is a pulling surface for bonding the asphalt sample.

[0010] Further, the pulling surface is approximately spherical.

[0011] Further, the pulling component further includes a support component and a driving component. The driving component includes a screw rod and a nut that cooperates with the screw rod. The lower end of the screw rod is fixedly connected to the pulling detection head, and the support component is used to support the driving component in the sample container.

[0012] Further, the support component includes a support frame and a support cylinder. The support cylinder is sleeved on the screw rod to support the nut, and the support frame is fixedly connected to the support cylinder.

[0013] Further, the support frame is provided with a clamping groove, and the clamping groove is clamped on the top of the sample container for cooperating with the support cylinder to support the driving component in the sample container.

[0014] Further, a limiting sliding groove extending in the vertical direction is formed inside the support cylinder for enabling the screw to reciprocate in a single degree of freedom inside the support cylinder.

[0015] Further, a limiting protrusion is provided on the screw rod, and the limiting protrusion is fitted in the limiting sliding groove to reciprocate in a single degree of freedom.

[0016] Further, a plurality of pulling grooves are provided on the pulling surface of the pulling detection head, and the pulling grooves are used to increase the contact area and friction force between the pulling detection head and the asphalt sample.

[0017] Further, a base is provided at the bottom of the sample container, and a plurality of positioning holes for positioning the sample container are formed in the base.

[0018] Advantages of the present utility model: The asphalt viscosity and toughness detection device of the present utility model can effectively enhance the adhesion between the asphalt sample and the pulling detection head, thereby preventing the situation of the pulling detection head being pulled off during the test, and can more accurately measure the viscosity and toughness value of the asphalt, and further evaluate the modification effect of the asphalt. At the same time, by adding positioning holes at the bottom of the sample container, it can adapt to various environments and can measure the viscosity and toughness on site. Description of the Drawings

[0019] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the pulling detection head;

[0022] Figure 3 is a schematic structural diagram of the pulling surface of the pulling detection head;

[0023] Figure 4 is a schematic structural diagram of the support component.

[0024] Reference numerals in the figure: 1, sample container; 2, drawing detection head; 3, screw; 4, support cylinder; 5, support frame; 6, nut; 7, base; 8, positioning hole; 9, limit projection; 10, drawing groove; 11, card slot; 12, limit sliding groove; 13, drawing surface. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] Figure 1 It is a structural schematic diagram of the present invention. Figure 2 It is a structural schematic diagram of the drawing detection head. Figure 3 It is a structural schematic diagram of the drawing detection head. Figure 4 It is a structural schematic diagram of the support assembly. As shown in the figure: The asphalt adhesion and toughness detection device of this embodiment includes: a sample container 1 for forming a containing space to pour the asphalt sample; a drawing assembly having a drawing detection head 2, and the drawing detection head 2 can be driven to move up and down in the sample container 1 for contacting the asphalt sample and performing the adhesion and toughness detection by drawing; the drawing assembly can be detachably received in the sample container 1 to improve the portability of the asphalt adhesion and toughness detection device. The sample container 1 of this embodiment is cylindrical, and can also be square, which will not be elaborated here.

[0028] In this embodiment, the bottom surface of the drawing detection head 2 is a drawing surface 13 for bonding the asphalt sample; multiple friction lines, friction grooves, bonding grooves, etc. can be provided on the surface of the drawing surface 13, which can increase the friction force between the drawing detection head 2 and the asphalt sample, and the drawing detection head 2 can bond the asphalt sample more effectively, avoiding the phenomenon of pulling during the adhesion and toughness detection process.

[0029] In this embodiment, the drawing surface 13 is approximately spherical; being approximately spherical means it can be a spherical surface composed of arcs, an elliptical spherical surface, a spherical surface composed of smooth curves, etc., such that the cross-section of the drawing surface 13 presents a structure with a smaller bottom and a larger top. Using the drawing surface 13 that is approximately spherical can increase the contact area between the drawing surface and the asphalt sample, ensuring that the drawing surface of the drawing detection head 2 is in contact with the asphalt sample to the greatest extent during the viscosity and ductility detection process.

[0030] In this embodiment, the drawing assembly further includes a support assembly and a drive assembly. The drive assembly includes a screw 3 and a nut 6 that mates with the screw 3. The lower end of the screw 3 is fixedly connected to the drawing detection head 2. The support assembly is used to support the drive assembly within the specimen container 1; supporting within the specimen container 1 means that the screw 3 in the drive assembly is supported by the support assembly at the axis of the specimen container 1 and near the top of the specimen container 1. By adjusting the relative position between the screw 3 and the nut 6, the depth of the drawing detection head 2 immersed in the asphalt sample can be adjusted. The lower end of the screw 3 is fixedly connected to the drawing detection head 2, enabling the drawing detection head 2 to be placed within the specimen container 1. The fixed connection method between the screw 3 and the drawing detection head 2 can adopt a detachable connection, such as threaded connection, pin connection, or other mechanical connection methods, which will not be elaborated here. The fixed connection method between the screw 3 and the drawing detection head 2 can also adopt a non-detachable connection, such as welding, bonding, etc., which will not be elaborated here.

[0031] In this embodiment, the support assembly includes a support frame 5 and a support cylinder 4. The support cylinder 4 is sleeved on the screw 3 to support the nut 6, and the support frame 5 is fixedly connected to the support cylinder 4. The support frame 5 includes at least three legs and is evenly distributed on the outer wall of the support cylinder 4, which can ensure that the support frame 5 effectively supports the support cylinder 4 and the drive assembly. The support frame 5 in this embodiment is composed of three legs.

[0032] In this embodiment, the support frame 5 is provided with a card slot 11. The card slot 11 is clamped on the top of the specimen container 1 and is used to cooperate with the support cylinder 4 to support the drive assembly within the specimen container 1. The width of the card slot 11 shall not be less than the thickness of the cylindrical side wall of the specimen container 1. It is preferably ensured that the width of the card slot 11 is the same as the thickness of the cylindrical side wall of the specimen container 1, which can ensure that after the card slot 11 of the support frame 5 is clamped on the top of the specimen container 1, the card slot 11 of the support frame 5 will not be misaligned or displaced, avoiding the rotation of the drawing detection head 2 due to the misalignment and displacement of the card slot 11 during the viscosity and ductility detection process.

[0033] In this embodiment, a limiting sliding groove 12 extending in the vertical direction is formed inside the support cylinder 4, which is used to enable the screw rod 3 to reciprocate in the support cylinder 4 with a single degree of freedom. The single degree of freedom means that the position of the object's movement can be determined by only a single spatial coordinate at any time. The direction of the single spatial coordinate here is the vertical direction, and the vertical direction is along the axis direction of the specimen container 1.

[0034] In this embodiment, a limiting protrusion 9 is provided on the screw rod 3, and the limiting protrusion 9 reciprocates with a single degree of freedom and is fitted in the limiting sliding groove 12. The limiting protrusion 9 can be a limiting boss integrally formed on the screw rod 3 or a limiting pin detachably installed on the screw rod 3. By driving the screw rod 3 to move in the vertical direction through the adjusting nut 6, at the same time, the limiting protrusion 9 fitted in the limiting sliding groove 12 of the support cylinder 4 also moves in the vertical direction, preventing the screw rod 3 from rotating in the support cylinder 4.

[0035] In this embodiment, a plurality of drawing grooves 10 are provided on the drawing surface 13 of the drawing detection head 2, and the drawing grooves 10 are used to increase the contact area and friction force between the drawing detection head 2 and the asphalt sample; as Figure 3 shown, the distribution of the drawing grooves 10 on the drawing surface of the drawing detection head 2 is approximately similar to the texture of the basketball joint. The arrangement of a plurality of drawing grooves 10 on the drawing surface 13 of the drawing detection head 2 can have a sufficient contact area with the asphalt sample, improving the adhesion between the asphalt sample and the drawing detection head 2.

[0036] In this embodiment, a base 7 is provided at the bottom of the specimen container 1, and a plurality of positioning holes 8 for positioning the specimen container 1 are formed in the base 7. The positioning holes 8 can be bolt holes. When it is necessary to perform asphalt adhesion and toughness detection on site, place the asphalt adhesion and toughness detection device on the ground, and install bolts in the bolt holes to position the asphalt adhesion and toughness detection device for use on site.

[0037] In this embodiment, the specific use steps of the asphalt adhesion and toughness detection device are as follows:

[0038] Preparation of asphalt sample: The asphalt sample to be detected is prepared strictly in accordance with the "Test Procedures for Bitumen and Bituminous Mixtures for Highway Engineering" (JTG E20—2011). The specimen container 1 is placed in an oven at 60 - 80 °C and preheated for 1 hour.

[0039] Treatment of the drawing detection head 2: The drawing detection head 2 of the asphalt adhesion and toughness detection device is cleaned with trichloroethylene. Trichloroethylene can dissolve the asphalt to form a mixture, ensuring that there is no asphalt residue on the drawing detection head 2 before each detection and avoiding the influence of the asphalt residue on the current asphalt adhesion and toughness detection.

[0040] Installation of the support component and the drive component: Align the limit protrusion 9 on the screw 3 with the limit chute 12 in the support cylinder 4 and insert it so that the support cylinder 4 is sleeved on the screw 3 and fixed with the nut 6.

[0041] Gradually inject the prepared asphalt sample into the specimen container 1. When there are no bubbles in the asphalt sample, quickly immerse the pull-out detection head 2 into the asphalt sample, and clamp the card slot 11 of the support frame 5 on the specimen container 1, and tighten and fix it with the nut 6 so that the surface of the pull-out detection head 2 is exactly flush with the asphalt specimen. Let it stand at room temperature for 1 to 1.5 hours. At this time, the asphalt sample shrinks slightly. Appropriately adjust the nut 6 so that the height of the pull-out detection head 2 remains flush with the upper surface of the asphalt sample.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An asphalt viscosity and toughness detection device, characterized in that: include: A sample container, used to form a containing space for pouring the asphalt sample; The pulling component has a pulling detection head, which can be driven to move up and down in the sample container to contact the asphalt sample and pull it to complete the viscosity and toughness test.

2. The asphalt viscosity and toughness detection device according to claim 1 is characterized in that: The bottom surface of the pulling detection head is a pulling surface, which is used for bonding asphalt samples.

3. The asphalt viscosity and toughness detection device according to claim 2 is characterized in that: The drawing surface is approximately a spherical surface.

4. The asphalt viscosity and toughness detection device according to claim 1 is characterized in that: The pulling assembly also includes a supporting assembly and a driving assembly. The driving assembly includes a screw and a nut matched with the screw. The lower end of the screw is fixedly connected to the pulling detection head. The supporting assembly is used to support the driving assembly in the sample container.

5. The asphalt viscosity and toughness detection device according to claim 4 is characterized in that: The support assembly includes a support frame and a support tube. The support tube is sleeved on the screw rod to support the nut. The support frame is fixedly connected to the support tube.

6. The asphalt viscosity and toughness detection device according to claim 5, characterized in that: The support frame is provided with a card slot, and the card slot is connected to the top of the sample container and is used to cooperate with the support tube to support the driving component in the sample container.

7. The asphalt viscosity and toughness detection device according to claim 5, characterized in that: A limiting sliding groove is provided inside the support cylinder along the up-and-down direction, so as to allow the screw to reciprocate in a single degree of freedom in the support cylinder.

8. The asphalt viscosity and toughness detection device according to claim 7, characterized in that: The screw rod is provided with a limiting protrusion, and the limiting protrusion is embedded in the limiting sliding groove in a single-degree-of-freedom reciprocating motion.

9. The asphalt viscosity and toughness detection device according to claim 1, characterized in that: The drawing surface of the drawing detection head is provided with a plurality of drawing grooves, and the drawing grooves are used to increase the contact area and friction force between the drawing detection head and the asphalt sample.

10. The asphalt viscosity and toughness detection device according to claim 1, characterized in that: A base is provided at the bottom of the sample container, and a plurality of positioning holes for positioning the sample container are opened on the base.

Images