Asphalt mixture oblique shearing auxiliary device

Abstract

The utility model discloses an asphalt mixture oblique shearing auxiliary device, and relates to the technical field of asphalt mixture tests. The inclined shearing auxiliary device for the asphalt mixture comprises an upper assembly and a lower assembly, the upper assembly comprises a pressure plate, a top surface part and an upper side part, and the pressure plate is connected with the top surface part and the upper side part respectively; the lower assembly comprises a supporting piece, a bottom face part and a lower side part, and the supporting piece is connected with the bottom face part and the lower side part. The upper portion of the pressure applying plate is detachably connected with a first angle adjusting piece, the lower portion of the supporting piece is detachably connected with a second angle adjusting piece, the first angle adjusting piece is used for adjusting the pressure applying angle of the upper assembly, and the second angle adjusting piece is used for adjusting the supporting angle of the lower assembly. By the adoption of the auxiliary device for oblique shearing of the asphalt mixture, the problems that in the prior art, the shearing angle and dislocation displacement cannot be adjusted can be solved.

Description

Technical Field

[0001] This utility model relates to the field of asphalt mixture testing technology, and in particular to an auxiliary device for inclined shearing of asphalt mixtures. Background Art

[0002] Asphalt mixtures are the main materials used for road paving. They are composed of asphalt, aggregates (such as crushed stone and sand), and fillers (such as mineral powder) mixed in a certain proportion. Asphalt concrete, due to its high modulus, long fatigue life, and strong resistance to rutting, is often used as the surface layer of channelized traffic sections, reducing the frequency and workload of road maintenance and achieving good economic and social benefits, making it one of the preferred materials in road construction. Therefore, research on the shear strength of asphalt mixtures is of great significance.

[0003] Currently, the relevant standard is Appendix C, Shear Strength Test Method, in JTG / T3364-02-2019 Technical Specification for Design and Construction of Highway Steel Bridge Deck. This test method is used to test the shear strength between asphalt mixture and steel plate. The asphalt mixture is subjected to oblique shear test according to Appendix C of JTG / T3364-02-2019 Technical Specification for Design and Construction of Highway Steel Bridge Deck to evaluate the shear resistance of asphalt concrete.

[0004] However, existing asphalt mixture oblique shear auxiliary devices cannot adjust different shear angles according to different needs. Secondly, the specimen is prone to displacement under stress during the test, which cannot guarantee that the specimen will be continuously stressed along the predetermined shear plane during the pressing process of the testing machine, thus affecting the accuracy of the test.

[0005] Therefore, there is an urgent need to design an asphalt mixture inclined shear auxiliary device to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an auxiliary device for inclined shearing of asphalt mixture, which can solve the problem that the shearing angle and displacement cannot be adjusted in the prior art.

[0007] To address the aforementioned technical problems, this utility model provides an asphalt mixture oblique shear auxiliary device for assisting specimens in oblique shear tests. The asphalt mixture oblique shear auxiliary device includes an upper component for applying pressure to the specimen and a lower component for supporting the specimen. The upper component includes a pressure plate, a top part for applying pressure to the top surface of the specimen, and an upper side part for applying pressure to the sides of the specimen. The pressure plate is connected to the top part and the upper side part, respectively, and transmits the pressure from an external pressurizing mechanism to the top part and the upper side part. The lower component includes a support member, a bottom part for positioning the bottom surface of the specimen, and a lower side part for positioning the other side of the specimen. The support member is connected to the bottom part and the lower side part respectively, and the support member is used to support the bottom part and the lower side part. A first angle adjustment member is detachably connected above the pressure plate, and a second angle adjustment member is detachably connected below the support member. The first angle adjustment member is used to adjust the pressure angle of the upper component, and the second angle adjustment member is used to adjust the support angle of the lower component.

[0008] As an improvement to the above solution, the upper component further includes a first internal adjustment member detachably connected to the upper side portion, the upper side portion abutting against the side of the specimen through the first internal adjustment member; the lower component further includes a second internal adjustment member detachably connected to the lower side portion, the lower side portion abutting against the other side of the specimen through the second internal adjustment member.

[0009] As an improvement to the above solution, the lower component also includes an internal component chassis, and the bottom surface abuts against the bottom surface of the specimen through the internal component chassis.

[0010] As an improvement to the above solution, the upper side is vertically disposed on the top surface, and the pressure plate is fixedly connected to the connection between the top surface and the upper side.

[0011] As an improvement to the above solution, the support member includes a support base and a support side plate that are perpendicular to each other, and the lower side is vertically disposed on the bottom surface; the support base is fixedly connected to the connection between the bottom surface and the lower side, and the support side plate is fixedly connected to the bottom surface of the bottom surface.

[0012] As an improvement to the above solution, a sliding base is also provided below the second angle adjusting member; the sliding base includes a base with a plurality of rolling shafts and a fixing plate provided on both sides of the base, and the base is provided with shaft grooves for placing the rolling shafts.

[0013] As an improvement to the above solution, the rolling shaft component includes a rolling shaft and bearings disposed at both ends of the rolling shaft, and the two ends of the rolling shaft are inserted into the fixing plates on both sides of the base through the bearings.

[0014] As an improvement to the above solution, the top surface of the fixing plate is higher than the top surface of the base; the fixing plate is provided with fixing holes to fix the fixing plate to both sides of the base by means of fasteners.

[0015] As an improvement to the above solution, the longitudinal section of the first angle adjusting member and the second angle adjusting member is triangular, and the top surface of the first angle adjusting member is parallel to the bottom surface of the second angle adjusting member.

[0016] As an improvement to the above solution, both the upper and lower parts are arc-shaped.

[0017] The beneficial effects of implementing this utility model are as follows:

[0018] This utility model of an asphalt mixture oblique shear auxiliary device applies pressure and supports the specimen through the upper and lower components, converts the pressure of the external pressurizing mechanism into an oblique shear force at a fixed angle on the specimen, and adjusts the oblique shear angle through a detachable first angle adjusting component and a second angle adjusting component.

[0019] Furthermore, the asphalt mixture inclined shear auxiliary device of this utility model also adapts to specimens of different sizes through the first internal component and the second internal component, and converts the displacement of the specimen into the movement of the asphalt mixture inclined shear auxiliary device and the specimen as a whole through the sliding base, so as to ensure that the specimen is continuously subjected to force along the shear plane at a predetermined angle during the test. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first embodiment of the asphalt mixture inclined shear auxiliary device of this utility model after loading a test specimen;

[0021] Figure 2 This is a perspective view of the first embodiment of the asphalt mixture inclined shear auxiliary device of this utility model after loading a test specimen;

[0022] Figure 3 This is a perspective view of the first embodiment of the asphalt mixture inclined shear auxiliary device of this utility model from another angle after loading the test specimen;

[0023] Figure 4 This is a schematic diagram of the second embodiment of the asphalt mixture inclined shear auxiliary device after loading the test specimen;

[0024] Figure 5 This is a schematic diagram of the sliding base in the asphalt mixture inclined shear auxiliary device of this utility model. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0026] See Figures 1-3 , Figures 1-3 The first embodiment of the asphalt mixture inclined shear auxiliary device of the present invention is shown. The asphalt mixture inclined shear auxiliary device of the present invention is used to assist the specimen 1 in the inclined shear test. It includes an upper component 2 for applying pressure to the specimen 1 and a lower component 3 for supporting the specimen 1.

[0027] The upper component 2 includes a pressure plate 21, a top part 22 for applying pressure to the top surface of the specimen 1, and an upper side part 23 for applying pressure to the side surface of the specimen 1. The pressure plate 21 is connected to the top part 22 and the upper side part 23 respectively, and the pressure plate 21 transmits the pressure of the external pressure mechanism to the top part 22 and the upper side part 23.

[0028] The lower component 3 includes a support member 31, a bottom part 32 for positioning the bottom surface of the specimen 1, and a lower side part 33 for positioning the other side of the specimen 1. The support member 31 is connected to the bottom part 32 and the lower side part 33 respectively, and the support member 31 is used to support the bottom part 32 and the lower side part 33.

[0029] A first angle adjustment component 4 is detachably connected to the upper part of the pressure plate 21, and a second angle adjustment component 5 is detachably connected to the lower part of the support component 31. The first angle adjustment component 4 is used to adjust the pressure angle of the upper component 2, and the second angle adjustment component 5 is used to adjust the support angle of the lower component 3.

[0030] Since the specimen 1 is generally cylindrical in the oblique shear test of asphalt mixture, the upper part 23 and the lower part 33 are both arc-shaped to adapt to the shape of the specimen 1.

[0031] The first angle adjusting member 4 and the second angle adjusting member 5 are respectively connected to the pressure plate 21 and the support plate 31 by bolts. Specifically, the bolts pass through the first angle adjusting member 4 and the pressure plate 21 in sequence to connect the first angle adjusting member 4 and the pressure plate 21, and the bolts pass through the second angle adjusting member 5 and the support member 31 in sequence to connect the second angle adjusting member 5 and the support member 31.

[0032] The pressure from the external pressurizing mechanism is directly transmitted to the top surface of the first angle adjusting member 4, and then to the pressure plate 21, the top part 22 and the upper side part 23. In conjunction with the lower component 3, the downward pressure of the external pressurizing mechanism is converted into a shearing force along a predetermined angle.

[0033] Preferably, to ensure that the pressure from the external pressurizing mechanism applies vertical pressure to the first angle adjusting member 4, the longitudinal sections of both the first angle adjusting member 4 and the second angle adjusting member 5 are triangular, with the top surface of the first angle adjusting member 4 parallel to the bottom surface of the second angle adjusting member 5. The first angle adjusting member 4 and the second angle adjusting member 5 are respectively connected to the pressure plate 21 and the support member 31 by bolts. When different shear angles are required for the experiment, the shear angle can be adjusted by replacing the first angle adjusting member 4 and the second angle adjusting member 5 with different angles.

[0034] In order to accommodate specimens 1 of different diameters, the upper assembly 2 also includes a first internal adjustment member 24 detachably connected to the upper side portion 23, and the upper side portion 23 abuts against the side of the specimen 1 through the first internal adjustment member 24.

[0035] The lower component 3 also includes a second internal adjustment member 34 detachably connected to the lower side portion 33, and the lower side portion 33 abuts against the other side of the specimen 1 through the second internal adjustment member 34.

[0036] To accommodate specimens 1 of different heights, the lower component 3 also includes an internal component chassis 35, through which the bottom surface 32 abuts against the bottom surface of the specimen 1.

[0037] Preferably, the first internal component 24 and the second internal component 34 are both connected to the upper side 23 and the lower side 33 respectively by bolts.

[0038] The first internal component 24 and the second internal component 34 can accommodate specimens 1 with smaller diameters, and the internal component chassis 35 can accommodate specimens 1 with smaller heights.

[0039] Specifically, the upper side portion 23 is vertically disposed on the top portion 22, and the pressure plate 21 is fixedly connected to the connection between the top portion 22 and the upper side portion 23. Preferably, in order to ensure uniform force transmission, the middle part of the pressure plate 21 can be welded and fixedly connected to the connection between the top portion 22 and the upper side portion 23.

[0040] The support member 31 includes a support base 311 and a support side plate 312 that are perpendicular to each other, and the lower side 33 is vertically disposed on the bottom part 32;

[0041] The support base 311 is fixedly connected to the connection between the bottom part 32 and the lower side part 33, and the support side plate 312 is fixedly connected to the bottom surface of the bottom part 32. Preferably, the middle part of the support base 311 is welded and fixed to the connection between the bottom part 32 and the lower side part 33, and the support side plate 312 is welded and fixed to the bottom surface of the bottom part 32.

[0042] See Figure 4 and Figure 5 , Figure 4 and Figure 5 This invention illustrates a second embodiment of the asphalt mixture inclined shear auxiliary device, which is related to... Figure 1 Unlike the first embodiment shown, the asphalt mixture inclined shear auxiliary device in this embodiment also includes a sliding base 6 located below the second angle adjusting member 5;

[0043] When the shear test is performed, the specimen 1 will be subjected to continuous shear force and will undergo a certain displacement, which will affect the accuracy of the test. Therefore, this embodiment introduces a sliding base 6.

[0044] The sliding base 6 includes a base 61 with a plurality of rolling shafts 611 and a fixing plate 62 on both sides of the base 61. The base 61 is provided with shaft grooves 612 for placing the rolling shafts 611.

[0045] The sliding base 6 is set up to convert the displacement of the specimen 1 into the movement of the asphalt mixture inclined shear auxiliary device and the specimen 1 as a whole, thereby ensuring that the specimen 1 is continuously subjected to force along the shear plane at a predetermined angle during the test.

[0046] The rolling shaft component 611 includes a rolling shaft 611a and bearings 611b disposed at both ends of the rolling shaft 611a. Both ends of the rolling shaft 611a are inserted into the fixing plates 62 on both sides of the base 61 through the bearings 611b.

[0047] In order to limit the position of the components above the sliding base 6, the top surface of the fixing plate 62 is higher than the top surface of the base 61;

[0048] The fixing plate 62 is provided with fixing holes 621 so as to fix the fixing plate 61 to both sides of the base 61 by means of fasteners.

[0049] In summary, the asphalt mixture oblique shear auxiliary device of this utility model applies pressure and supports the specimen 1 through the upper component 2 and the lower component 3, converting the pressure of the external pressurizing mechanism into an oblique shear force at a fixed angle on the specimen 1. Furthermore, the oblique shear angle can be adjusted through the detachable first angle adjusting component 4 and the second angle adjusting component 5. Secondly, the first internal component 24 and the second internal component 34 accommodate specimens 1 of different sizes, and the sliding base 6 converts the displacement of the specimen 1 into movement of the asphalt mixture oblique shear auxiliary device and the specimen 1 as a whole, ensuring that the specimen 1 is continuously subjected to force along the shear plane at a predetermined angle during the test.

[0050] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An auxiliary device for oblique shear testing of asphalt mixtures, used to assist specimens in oblique shear tests, characterized in that, It includes an upper component for applying pressure to the specimen and a lower component for supporting the specimen; The upper component includes a pressure plate, a top part for applying pressure to the top surface of the specimen, and an upper part for applying pressure to the side surface of the specimen. The pressure plate is connected to the top part and the upper part respectively, and the pressure plate transmits the pressure from the external pressure mechanism to the top part and the upper part. The lower component includes a support member, a bottom part for positioning the bottom surface of the specimen, and a lower part for positioning the other side of the specimen. The support member is connected to the bottom part and the lower part respectively, and the support member is used to support the bottom part and the lower part. A first angle adjustment component is detachably connected to the upper part of the pressure plate, and a second angle adjustment component is detachably connected to the lower part of the support component. The first angle adjustment component is used to adjust the pressure angle of the upper component, and the second angle adjustment component is used to adjust the support angle of the lower component.

2. The asphalt mixture inclined shear auxiliary device according to claim 1, characterized in that, The upper component also includes a first internal adjustment member detachably connected to the upper side portion, the upper side portion abutting against the side of the specimen through the first internal adjustment member; The lower component also includes a second internal adjustment member detachably connected to the lower side portion, the lower side portion abutting against the other side of the specimen via the second internal adjustment member.

3. The asphalt mixture inclined shear auxiliary device according to claim 2, characterized in that, The lower component also includes an internal component chassis, and the bottom part abuts against the bottom surface of the specimen through the internal component chassis.

4. The asphalt mixture inclined shear auxiliary device according to claim 1, characterized in that, The upper side portion is vertically disposed on the top surface portion, and the pressure plate is fixedly connected to the connection between the top surface portion and the upper side portion.

5. The asphalt mixture inclined shear auxiliary device according to claim 1 or 4, characterized in that, The support includes a support base and a support side plate that are perpendicular to each other, and the lower side is vertically disposed on the bottom surface. The support base is fixedly connected to the connection between the bottom part and the lower side part, and the support side plate is fixedly connected to the bottom surface of the bottom part.

6. The asphalt mixture inclined shear auxiliary device according to claim 1, characterized in that, It also includes a sliding base located below the second angle adjusting member; The sliding base includes a base with a plurality of rolling shafts and a fixing plate on both sides of the base. The base has shaft grooves for placing the rolling shafts.

7. The asphalt mixture inclined shear auxiliary device according to claim 6, characterized in that, The rolling shaft component includes a rolling shaft and bearings at both ends of the rolling shaft. The two ends of the rolling shaft are inserted into the fixing plates on both sides of the base through the bearings.

8. The asphalt mixture inclined shear auxiliary device according to claim 6, characterized in that, The top surface of the fixing plate is higher than the top surface of the base; The fixing plate is provided with fixing holes so as to fix the fixing plate to both sides of the base by means of fasteners.

9. The asphalt mixture inclined shear auxiliary device according to claim 1, characterized in that, The longitudinal sections of the first and second angle adjusting components are triangular, and the top surface of the first angle adjusting component is parallel to the bottom surface of the second angle adjusting component.

10. The asphalt mixture inclined shear auxiliary device according to claim 1, characterized in that, Both the upper and lower sides are arc-shaped.

Images