Device for testing early strength of cold-mixed asphalt mixture

Abstract

The utility model discloses a device for testing the early strength of a cold-mixed asphalt mixture. The device comprises a base, a fixed test piece tray, a movable test piece tray, a first top cover, a second top cover and a force application arm, the fixed test piece tray is arranged at the top of the base, the first top cover is detachably arranged above the fixed test piece tray, and the first top cover is matched with the fixed test piece tray; one end of the fixed test piece tray is hinged with the movable test piece tray; the second top cover is detachably arranged above the movable test piece tray; one end of the force application arm is connected with the movable test piece tray, and the other end of the force application arm is connected with an external force application detection device. The device for testing the early strength of the cold-mixed asphalt mixture is simple in structure and easy to operate, a tester can better evaluate the early strength difference level caused by the internal cohesive force difference of the cold-mixed asphalt mixture according to an experimental test result, and compared with a conventionally used 15 DEG C splitting strength index, the early strength difference level of the cold-mixed asphalt mixture is greatly improved. And the problems caused by different skeletons, high variability and the like are reduced.

Description

Technical Field

[0001] The utility model relates to the field of testing equipment, in particular to an early strength testing device for cold-mix asphalt mixture. Background Art

[0002] Cold mix asphalt is a material commonly used in road repair and construction. It is usually mixed with asphalt emulsifier, mineral materials such as crushed stone or gravel, water and other additives without heating. As the most popular green and environmentally friendly material, cold mix asphalt has always attracted wide attention from industry personnel.

[0003] In the prior art, the molding of cold-mix asphalt mixture is slow, but few researchers pay attention to the trend of its early strength change. There is no special means for testing the early strength of cold-mix asphalt mixture, and there is a lack of specific equipment for testing the early strength of cold-mix asphalt mixture. Utility Model Content

[0004] The utility model aims to provide a device for testing the early strength of cold-mix asphalt mixture, so as to solve the problem of lack of a specific device for testing the early strength of cold-mix asphalt mixture.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a cold-mix asphalt mixture early strength testing device, comprising a base, a fixed specimen tray, a movable specimen tray, a first top cover, a second top cover and a force application arm;

[0007] The fixed specimen tray is arranged on the top of the base, the first top cover is detachably arranged above the fixed specimen tray, the first top cover cooperates with the fixed specimen tray to clamp one end of the cold-mix asphalt mixture; one end of the fixed specimen tray is hinged to the movable specimen tray, and the fixed specimen tray cooperates with the movable specimen tray to form a testing station; the second top cover is detachably arranged above the movable specimen tray; the second top cover cooperates with the movable specimen tray to clamp the other end of the cold-mix asphalt mixture;

[0008] One end of the force applying arm is connected to the movable test piece tray, and the other end of the force applying arm is connected to an external force applying detection device.

[0009] In the cold-mix asphalt early strength testing device, the edges of the fixed specimen tray and the movable specimen tray are both provided with a plurality of threaded rods at intervals, the first top cover is provided with a first through hole corresponding to the position of the threaded rod of the fixed specimen tray, and the second top cover is provided with a second through hole corresponding to the position of the threaded rod of the movable specimen tray; the threaded rod is inserted into the first through hole or the second through hole corresponding to the position, and the threaded rod is threadedly connected with a nut, so that the first top cover cooperates with the fixed specimen tray to clamp one end of the cold-mix asphalt mixture, or the second top cover cooperates with the movable specimen tray to clamp the other end of the cold-mix asphalt mixture.

[0010] In the cold mix asphalt early strength testing device, a connecting piece is provided at the other end of the force application arm, and the top of the connecting piece is connected to an external force application detection device.

[0011] In the cold mix asphalt early strength testing device, the end surface of one end of the fixed specimen tray is rotatably equipped with an axle rod, and one end of the movable specimen tray is provided with a mounting block, the mounting block is provided with a through hole, and the axle rod passes through the mounting block through the through hole, so that the movable specimen tray can rotate along the axis of the axle rod.

[0012] In the cold mix asphalt early strength testing device, the bottom surfaces of the fixed specimen tray, the movable specimen tray, the first top cover and the second top cover are all semicircular, and the rectangular side surface of the fixed specimen tray is hinged to the rectangular side surface of the movable specimen tray.

[0013] In the cold mix asphalt early strength testing device, the base includes a support seat and a connecting column; the top of the connecting column is connected to the bottom of the fixed specimen tray, and the bottom of the connecting column is connected to the support seat.

[0014] In the cold-mix asphalt mixture early strength testing device, the base also includes two lateral support rods, the bottom of the connecting column is connected to one end of the support seat, and the two lateral support rods are respectively arranged at the other end of the support seat, one of the lateral support rods is located on one side of the length direction of the support seat, and the other lateral support rod is located on the other side of the length direction of the support seat; the support seat is located directly below the projection of the force arm.

[0015] A technical solution in the utility model can have the following beneficial effects:

[0016] The cold-mix asphalt mixture early strength testing device has a simple structure and is easy to operate. The tester can better evaluate the level of early strength difference caused by the difference in internal cohesion of the cold-mix mixture based on the results of the experimental test. Compared with the conventionally used 15°C splitting strength index, it reduces the problems caused by the different skeletons and large variability of the cold-mix asphalt mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of one embodiment of the utility model;

[0018] In the accompanying drawings: test piece a, base 1, fixed specimen tray 2, movable specimen tray 3, first top cover 4, second top cover 5, force arm 6; threaded rod 7, nut 8, connecting piece 9, support seat 11, connecting column 12, lateral support rod 13, shaft rod 21. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0021] In the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Please refer to Figure 1 The utility model provides a cold-mix asphalt early strength testing device, comprising a base 1, a fixed specimen tray 2, a movable specimen tray 3, a first top cover 4, a second top cover 5 and a force application arm 6;

[0024] The fixed specimen tray 2 is arranged on the top of the base 1, and the first top cover 4 is detachably arranged above the fixed specimen tray 2. The first top cover 4 cooperates with the fixed specimen tray 2 to clamp one end of the cold-mix asphalt mixture; one end of the fixed specimen tray 2 is hinged to the movable specimen tray 3, and the fixed specimen tray 2 cooperates with the movable specimen tray 3 to form a testing station; the second top cover 5 is detachably arranged above the movable specimen tray 3; the second top cover 5 cooperates with the movable specimen tray 3 to clamp the other end of the cold-mix asphalt mixture;

[0025] One end of the force applying arm 6 is connected to the movable specimen tray 3 , and the other end of the force applying arm 6 is connected to an external force detecting device.

[0026] The cold-mix asphalt mixture early strength testing device has a simple structure and is easy to operate. It includes a base 1, a fixed specimen tray 2, a movable specimen tray 3, a first top cover 4, a second top cover 5 and a force-applying arm 6. The fixed specimen tray 2 cooperates with the movable specimen tray 3 to form a testing station, and a test piece a is placed at the testing station. The fixed specimen tray 2 and the first top cover 4 clamp one end of the cold-mix asphalt mixture, and the movable specimen tray 3 and the second top cover 5 clamp one end of the cold-mix asphalt mixture. When an external force-applying detection device applies downward pressure to the force-applying arm 6, the force-applying arm 6 drives the movable specimen tray 3 to The hinge between the fixed specimen tray 2 and the movable specimen tray 3 is a rotating shaft that rotates downward, thereby achieving the purpose of breaking the cold-mix asphalt mixture; the force arm 6 is connected to the external force detection device, which can record the applied force and force time, and record the time when the cold-mix asphalt mixture breaks. The test personnel can better evaluate the level of early strength difference caused by the difference in internal cohesion of the cold-mix mixture based on the results of the experimental test. Compared with the conventionally used 15°C splitting strength and other indicators, the problems caused by the different skeletons and large variability of the cold-mix asphalt mixture are reduced.

[0027] Specifically, a plurality of threaded rods 7 are provided at intervals on the edges of the fixed specimen tray 2 and the movable specimen tray 3, the first top cover 4 is provided with a first through hole corresponding to the position of the threaded rod 7 of the fixed specimen tray 2, and the second top cover 5 is provided with a second through hole corresponding to the position of the threaded rod 7 of the movable specimen tray 3; the threaded rod 7 is inserted into the first through hole or the second through hole corresponding to the position, and the threaded rod 7 is threadedly connected with a nut 8, so that the first top cover 4 cooperates with the fixed specimen tray 2 to clamp one end of the cold-mix asphalt mixture, or the second top cover 5 cooperates with the movable specimen tray 3 to clamp the other end of the cold-mix asphalt mixture.

[0028] In a specific embodiment of the utility model, the fixed specimen tray 2 and the first top cover 4, and the movable specimen tray 3 and the second top cover 5 are detachably connected by means of threaded rods 7 and nuts 8; when the test piece a is placed on the test station, the first through hole of the first top cover 4 is aligned with the threaded rod 7 on the fixed specimen tray 2, and the first top cover 4 is placed on the top surface of the test piece a, and the nut 8 and the threaded rod 7 on the fixed specimen tray 2 are threadedly connected, so that the first top cover 4 is tightly against the top surface of the test piece a, and the bottom surface of the test piece a is tightly against the fixed specimen tray 2, thereby achieving the purpose of the first top cover 4 and the fixed specimen tray 2 cooperating to clamp one end of the cold-mixed asphalt mixture. The movable specimen tray 3 is also provided with a threaded rod 7, and the second top cover 5 is provided with a second through hole. Similarly, the second top cover 5 is also tightly against the top surface of the test piece a by means of nuts 8 and the threaded rod 7 on the movable specimen tray 3, thereby achieving the purpose of the second top cover 5 and the movable specimen tray 3 cooperating to clamp the other end of the cold-mixed asphalt mixture.

[0029] Specifically, a connecting piece 9 is provided at the other end of the force applying arm 6 , and the top of the connecting piece 9 is connected to an external force applying detection device.

[0030] The connecting piece 9 is used to connect with the external force detection device so that the force arm 6 is parallel to the horizontal plane in the idle state, so that the bottom surfaces of the fixed specimen tray 2 and the movable specimen tray 3 are in the same plane, thereby forming a test station, which is convenient for the tester to place the test piece a, makes the placement position of each test piece a uniform, and reduces the test error.

[0031] Specifically, the end surface of one end of the fixed specimen tray 2 is rotatably equipped with an axle rod 21, and one end of the movable specimen tray 3 is provided with a mounting block, and the mounting block is provided with a through hole. The axle rod 21 passes through the mounting block through the through hole, so that the movable specimen tray 3 can rotate along the axis of the axle rod 21.

[0032] In a specific embodiment of the utility model, rotating seats are respectively provided on both sides of the hinged end surface of the fixed specimen tray 2, one end of the shaft rod 21 is rotatably assembled on the rotating seat on one side, and the other end of the shaft rod 21 is rotatably assembled on the rotating seat on the other side; a mounting block is provided on the hinged end surface of the movable specimen tray 3, and the shaft rod 21 passes through the mounting block through a through hole, so that the movable specimen tray 3 can rotate along the axis of the shaft rod 21. The above structure is simple and easy to install.

[0033] Specifically, the bottom surfaces of the fixed specimen tray 2 , the movable specimen tray 3 , the first top cover 4 and the second top cover 5 are all semicircular, and the rectangular side surface of the fixed specimen tray 2 is hinged to the rectangular side surface of the movable specimen tray 3 .

[0034] In a specific embodiment of the present invention, the bottom surfaces of the fixed specimen tray 2 and the movable specimen tray 3 are both semicircular, so that the bottom surface of the test station is circular. The above structure prevents the test piece a or the tester from bumping against the corners of the test station, thereby avoiding damage to the test piece a or injury to the tester.

[0035] Specifically, the base 1 includes a support seat 11 and a connecting column 12 ; the top of the connecting column 12 is connected to the bottom of the fixed specimen tray 2 , and the bottom of the connecting column 12 is connected to the support seat 11 .

[0036] The connecting column 12 serves to connect the supporting base 11 and the fixed specimen tray 2, and the supporting base 11 serves to fix the overall structure to prevent the cold mix asphalt mixture early strength testing device from tipping over during the test.

[0037] Specifically, the base 1 also includes two lateral support rods 13, the bottom of the connecting column 12 is connected to one end of the support seat 11, and the two lateral support rods 13 are respectively arranged at the other end of the support seat 11, one of the lateral support rods 13 is located on one side of the length direction of the support seat 11, and the other lateral support rod 13 is located on the other side of the length direction of the support seat 11; the support seat 11 is located directly below the projection of the force arm 6.

[0038] The lateral support rod 13 plays the role of auxiliary support to prevent the cold mix asphalt mixture early strength test device from tipping over on both sides of the length direction of the support seat 11 during the test. The force arm 6 has a certain length and uses the lever principle to reduce the force to be applied. The support seat 11 is long and is located directly below the projection of the force arm 6, which improves the stability of the overall structure and prevents tipping over during the test.

[0039] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A cold mix asphalt early strength testing device, characterized in that: It includes a base, a fixed specimen tray, a movable specimen tray, a first top cover, a second top cover and a force application arm; The fixed specimen tray is arranged on the top of the base, the first top cover is detachably arranged above the fixed specimen tray, the first top cover cooperates with the fixed specimen tray to clamp one end of the cold-mix asphalt mixture; one end of the fixed specimen tray is hinged to the movable specimen tray, and the fixed specimen tray cooperates with the movable specimen tray to form a testing station; the second top cover is detachably arranged above the movable specimen tray; the second top cover cooperates with the movable specimen tray to clamp the other end of the cold-mix asphalt mixture; One end of the force applying arm is connected to the movable test piece tray, and the other end of the force applying arm is connected to an external force applying detection device.

2. The cold mix asphalt early strength testing device according to claim 1, characterized in that: The edges of the fixed specimen tray and the movable specimen tray are both provided with a plurality of threaded rods at intervals, the first top cover is provided with a first through hole corresponding to the position of the threaded rod of the fixed specimen tray, and the second top cover is provided with a second through hole corresponding to the position of the threaded rod of the movable specimen tray; the threaded rod is inserted into the first through hole or the second through hole corresponding to the position, and the threaded rod is threadedly connected with a nut, so that the first top cover cooperates with the fixed specimen tray to clamp one end of the cold-mix asphalt mixture, or the second top cover cooperates with the movable specimen tray to clamp the other end of the cold-mix asphalt mixture.

3. The cold mix asphalt early strength testing device according to claim 1, characterized in that: The other end of the force applying arm is provided with a connecting piece, and the top of the connecting piece is connected to an external force applying detection device.

4. The cold mix asphalt early strength testing device according to claim 1, characterized in that: The end surface of one end of the fixed specimen tray is rotatably equipped with a shaft rod, and one end of the movable specimen tray is provided with a mounting block, the mounting block is provided with a through hole, and the shaft rod passes through the mounting block through the through hole, so that the movable specimen tray can rotate along the axis of the shaft rod.

5. The cold mix asphalt early strength testing device according to claim 1, characterized in that: The bottom surfaces of the fixed specimen tray, the movable specimen tray, the first top cover and the second top cover are all semicircular, and the rectangular side surface of the fixed specimen tray is hinged to the rectangular side surface of the movable specimen tray.

6. The cold mix asphalt early strength testing device according to claim 1, characterized in that: The base comprises a supporting seat and a connecting column; the top of the connecting column is connected to the bottom of the fixed specimen tray, and the bottom of the connecting column is connected to the supporting seat.

7. The cold mix asphalt early strength testing device according to claim 6, characterized in that: The base also includes two lateral support rods, the bottom of the connecting column is connected to one end of the support seat, and the two lateral support rods are respectively arranged at the other end of the support seat, one of the lateral support rods is located on one side of the length direction of the support seat, and the other lateral support rod is located on the other side of the length direction of the support seat; the support seat is located directly below the projection of the force arm.

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