Asphalt mixture Marshall test piece thickness measuring device

Abstract

The utility model discloses an asphalt mixture Marshall test piece thickness measuring device which comprises a base, a digital display vernier caliper is fixed to the base, an L-shaped connecting rod is fixed to one side of a vernier scale of the digital display vernier caliper, a measuring top plate capable of being located in a Marshall test mold is fixed to the lower end of the L-shaped connecting rod, and a measuring bottom plate is fixed to the base through a vertical connecting rod. And a plurality of leveling bolts are screwed on the lower side of the base. The method comprises the following steps: after compaction of an asphalt mixture Marshall test piece is finished, immediately taking off paper on two surfaces by using tweezers, pressing a measuring top plate and a measuring bottom plate, carrying out zero setting, separating the measuring top plate from the measuring bottom plate, putting the bottom surface of the test piece on the measuring bottom plate, pressing the measuring top plate to enable the measuring top plate to be attached to the top surface of the test piece, at the moment, the numerical value displayed on the digital display screen on the vernier scale is the height of the asphalt mixture Marshall test piece. According to the measurement mode, the height of the test piece can be measured only by placing the test piece and the test mold on the measurement bottom plate, so that the height measurement convenience and accuracy of the test piece can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the production and measurement of asphalt mixture Marshall specimens, in particular to a device for measuring the thickness of asphalt mixture Marshall specimens. Background Technique

[0002] At present, in the mix design of asphalt mixtures, when making specimens by the compaction method, conducting the Marshall stability test on asphalt mixtures, and measuring the density of asphalt mixture Marshall specimens by the volume method, it is necessary to measure the height of the asphalt mixture Marshall specimens to determine whether the specimen height meets the dimensional requirements. However, during the production process of asphalt mixture Marshall specimens, since the asphalt mixture Marshall specimens are located inside the test mold, the conventional measurement method requires manually holding a corresponding measuring ruler to calculate the height of the asphalt mixture Marshall specimens by measuring the height of the Marshall test mold and the remaining heights on both sides inside (the height of the specimen from the upper and lower openings of the test mold). The specimen height is equal to the test mold height - the remaining height on one side inside - the remaining height on the other side inside. It requires two people to cooperate to complete the measurement of the three heights. The measurement process is relatively complex, the accuracy of the obtained specimen height is relatively low, and at this time, the temperature of the asphalt mixture specimen is relatively high, posing a risk of scalding to the measurement personnel. Content of the Utility Model

[0003] The purpose of this application is to provide a device for measuring the thickness of asphalt mixture Marshall specimens, so as to solve the problems of complex measurement process, low measurement accuracy, and the risk of scalding to measurement personnel in the existing measurement of the height of asphalt mixture Marshall specimens.

[0004] To solve the above technical problems, this application provides a device for measuring the thickness of asphalt mixture Marshall specimens, including:

[0005] A base, on which a digital vernier caliper is fixed. One side of the vernier of the digital vernier caliper is fixed with an L-shaped connecting rod. The lower end of the L-shaped connecting rod is fixed with a measuring top plate that can be located inside the Marshall test mold. A measuring bottom plate corresponding to the measuring top plate is fixed on the base through a vertical connecting rod. A plurality of leveling bolts are screwed on the lower side of the base.

[0006] On the basis of the above embodiment, as a preferred implementation manner, a horizontal bubble level is further arranged on one side of the base.

[0007] On the basis of the above embodiment, as a preferred implementation manner, the number of the leveling bolts is 4.

[0008] It should be specifically noted in the solution that both the measuring top plate and the measuring bottom plate are circular plates with the same diameter as the asphalt mixture Marshall specimen.

[0009] On the basis of the above embodiments, as a preferred embodiment, the main scale in the digital display vernier caliper and the base are integrally formed.

[0010] Compared with the prior art, a device for measuring the thickness of a Marshall specimen of asphalt mixture provided by the utility model includes a base, a digital display vernier caliper is fixed on the base, an L-shaped connecting rod is fixed on one side of the vernier of the digital display vernier caliper, a measuring top plate that can be located inside the Marshall test mold is fixed at the lower end of the L-shaped connecting rod, a measuring bottom plate corresponding to the measuring top plate is fixed on the base through a vertical connecting rod, and a plurality of leveling bolts are screwed on the lower side of the base. After the compaction of the Marshall specimen of asphalt mixture is completed, immediately use tweezers to remove the papers on both sides, press the measuring top plate and the measuring bottom plate together for zero adjustment. After zero adjustment, separate the measuring top plate and the measuring bottom plate, and determine the separation height according to the height of the Marshall test mold for the asphalt mixture. Then, place the bottom surface of the Marshall specimen of asphalt mixture on the measuring bottom plate, and then operate to press down the measuring top plate so that the measuring top plate fits against the top surface of the Marshall specimen of asphalt mixture. At this time, the value displayed on the digital display screen of the vernier is the height of the Marshall specimen of asphalt mixture. This measurement method only needs to place the Marshall specimen of asphalt mixture together with the Marshall test mold on the measuring bottom plate to measure its height, and one person can complete it independently, thereby improving the convenience and accuracy of measuring the height of the Marshall specimen of asphalt mixture and effectively preventing the risk of scalding the measuring personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the present application, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0012] Figure 1 Schematic structural diagram of a device for measuring the thickness of a Marshall specimen of asphalt mixture provided by an embodiment of the present application;

[0013] Figure 2 Schematic diagram of the positional relationship between a Marshall specimen of asphalt mixture and a Marshall test film provided by an embodiment of the present application;

[0014] In the figure: 1, base; 2, digital display vernier caliper; 20, vernier; 21, main scale; 22, pushing roller; 23, digital display screen; 3, L-shaped connecting rod; 4, Marshall test mold; 5, measuring top plate; 6, vertical connecting rod; 7, measuring bottom plate; 8, leveling bolt; 9, horizontal bubble level; 10, Marshall specimen of asphalt mixture. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings.

[0016] The core of this application is to provide a device for measuring the thickness of Marshall specimens of asphalt mixtures, which solves the problems of complex measurement process, low measurement accuracy, and the risk of scalding the measurement personnel in the existing measurement of the height of Marshall specimens of asphalt mixtures.

[0017] Figure 1 It is a schematic structural diagram of a device for measuring the thickness of Marshall specimens of asphalt mixtures provided by an embodiment of this application. Figure 2 It is a schematic diagram of the positional relationship between a Marshall specimen of asphalt mixture and a Marshall test mold provided by an embodiment of this application. See Figures 1 to 2 as shown.

[0018] Embodiment 1

[0019] A device for measuring the thickness of Marshall specimens of asphalt mixtures includes a base 1. The shape and size of the base 1 can be determined according to the actual situation. A digital vernier caliper 2 is fixed on the base 1. The structure and working principle of the digital vernier caliper 2 can be referred to the prior art. One side of the vernier 20 of the digital vernier caliper 2 is fixed with an L-shaped connecting rod 3. The lower end of the L-shaped connecting rod 3 is fixed with a measuring top plate 5 that can be located inside the Marshall test mold 4. During actual use, the vernier 20 can be moved on the main scale 21 by operating the pushing roller 22 in the digital vernier caliper 2, and then the measuring top plate 5 can be driven to move up and down through the L-shaped connecting rod 3. A measuring bottom plate 7 is fixed on the base 1 through a vertical connecting rod 6. The measuring bottom plate 7 corresponds to the measuring top plate 5. A plurality of leveling bolts 8 are screwed on the lower side of the base 1. During use, the base 1 can be first leveled by operating the leveling bolts 8 (screwed out or into the base 1). Then, after pressing the measuring top plate 5 and the measuring bottom plate 7 together for zero adjustment and separating them, after the compaction of the Marshall specimen 10 of asphalt mixture is completed, immediately use tweezers to remove the papers on both sides of the Marshall specimen 10 of asphalt mixture, place the bottom surface of the Marshall specimen 10 of asphalt mixture on the measuring bottom plate 7, and then operate to press down the measuring top plate 5 to make the measuring top plate 5 fit the top surface of the Marshall specimen 10 of asphalt mixture. At this time, the value displayed on the digital display screen 23 of the vernier 20 is the height value of the Marshall specimen 10 of asphalt mixture.

[0020] Embodiment 2

[0021] Based on Embodiment 1, for an asphalt mixture Marshall specimen thickness measuring device, in order to ensure the levelness of the base 1, preferably, a level bubble 9 is further provided on one side of the base 1. Whether the base 1 is in a horizontal state can be accurately determined through the level bubble 9. For the structure and working principle of the level bubble 9, reference can be made to the prior art.

[0022] Based on Embodiment 1, for an asphalt mixture Marshall specimen thickness measuring device, in order to achieve accurate leveling, preferably, 4 leveling bolts 8 can be provided on the lower side of the base 1.

[0023] Based on Embodiment 1, for an asphalt mixture Marshall specimen thickness measuring device, in order to improve the fitting degree between the measuring top plate 5 and the measuring bottom plate 7 and the asphalt mixture Marshall specimen 10, preferably, both the measuring top plate 5 and the measuring bottom plate 7 can be set as circular plates with the same diameter as the asphalt mixture Marshall specimen 10. The diameters of the measuring top plate 5 and the measuring bottom plate 7 can be selected according to the diameter of the asphalt mixture Marshall specimen 10. For standard Marshall specimens, the measuring top plate 5 and the measuring bottom plate 7 with a diameter of 8 cm are adopted, and for large Marshall specimens, the measuring top plate 5 and the measuring bottom plate 7 with a diameter of 13 cm are selected.

[0024] Based on Embodiment 1, for an asphalt mixture Marshall specimen thickness measuring device, in order to improve the convenience of design and installation, preferably, the main scale 21 in the digital display vernier caliper 2 and the base 1 can be set as an integrally formed structure.

[0025] An asphalt mixture Marshall specimen thickness measuring device provided by the present utility model includes a base 1. A digital display vernier caliper 2 is fixed on the base 1. One side of the vernier 20 of the digital display vernier caliper 2 is fixed with an L-shaped connecting rod 3. The lower end of the L-shaped connecting rod 3 is fixed with a measuring top plate 5 that can be located inside the Marshall test mold 4. The base 1 is fixed with a measuring bottom plate 7 corresponding to the measuring top plate 5 through a vertical connecting rod 6. A plurality of leveling bolts 8 are screwed and arranged on the lower side of the base 1. After the asphalt mixture Marshall specimen 10 is compacted, immediately use tweezers to remove the papers on both sides, press the measuring top plate 5 and the measuring bottom plate 7 together for zero adjustment. After zero adjustment, separate the measuring top plate 5 and the measuring bottom plate 7. The separation height is determined according to the height of the asphalt mixture Marshall test mold 4. Then, place the bottom surface of the asphalt mixture Marshall specimen 10 on the measuring bottom plate 7, and then operate to press down the measuring top plate 5 to make the measuring top plate 5 fit with the top surface of the asphalt mixture Marshall specimen 10. At this time, the value displayed on the digital display screen of the vernier 20 is the height of the asphalt mixture Marshall specimen. This measuring method only needs to place the asphalt mixture Marshall specimen together with the Marshall test mold 4 on the measuring bottom plate 7 to measure its height, and one person can complete it independently, thereby improving the convenience and accuracy of measuring the height of the asphalt mixture Marshall specimen 10 and effectively preventing the risk of scalding the measuring personnel.

[0026] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is pointed out by the claims.

[0027] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

1. An apparatus for measuring the thickness of a Marshall specimen of asphalt mixture, characterized in that, Including: A base (1), on which a digital vernier caliper (2) is fixed. On one side of the vernier scale (20) of the digital vernier caliper (2), an L-shaped connecting rod (3) is fixed. At the lower end of the L-shaped connecting rod (3), a measuring top plate (5) which can be located inside a Marshall test mold (4) is fixed. On the base (1), a measuring bottom plate (7) corresponding to the measuring top plate (5) is fixed through a vertical connecting rod (6). A plurality of leveling bolts (8) are screwed on the lower side of the base (1).

2. The asphalt mixture Marshall specimen thickness measuring device according to claim 1, characterized in that On one side of the base (1), a horizontal bubble level (9) is further provided.

3. The Marshall specimen thickness measuring device for asphalt mixture according to claim 1, characterized in that, The number of the leveling bolts (8) is 4.

4. The asphalt mixture Marshall specimen thickness measuring device according to claim 1, characterized in that Both the measuring top plate (5) and the measuring bottom plate (7) are circular plates with the same diameter as that of a Marshall specimen of asphalt mixture (10).

5. The thickness measuring device for Marshall specimens of asphalt mixture according to claim 1, characterized in that, The main scale (21) in the digital vernier caliper (2) and the base (1) are integrally formed.

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