Device for detecting bending property of asphalt mixture

Abstract

The utility model discloses a device for detecting the bending property of an asphalt mixture, which comprises a bottom plate, wherein a mounting groove is formed in the upper surface of the bottom plate; the three-dimensional laser scanner is assembled in the mounting groove; the top of the mounting groove is sealed by the light-transmitting plate; the guide rail group is arranged on the upper surface of the bottom plate, the guide rail group comprises a first guide rail and a second guide rail, and the first guide rail and the second guide rail are parallel to each other and are symmetrically arranged on the two sides of the mounting groove; the supporting unit is assembled on the guide rail group and can slide along the guide rail group; a driving unit; and a pressing assembly. The device has the beneficial effects that the bending property of the asphalt mixture is comprehensively analyzed by adopting the three-dimensional laser scanner to measure the deformation curve of the asphalt mixture after being stressed and then combining the time change of the down pressure and the time change of the deformation curve of the asphalt mixture, and the structure and data are systematized, so that the bending property of the asphalt mixture is accurately measured. And the measurement efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway detection, in particular to a device for detecting the bending performance of asphalt mixture. Background Technique

[0002] Asphalt mixture is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder. Asphalt mixture is the general term for the mixture formed by mixing mineral materials and asphalt binder. It is divided into continuous gradation and discontinuous gradation mixtures according to the material composition and structure, and is widely used in the road construction industry.

[0003] Before the use of asphalt mixture, various tests need to be carried out. Among them, the bending test of asphalt mixture can better reflect the performance of the mixture. The bending test of asphalt mixture is a test on a small beam specimen of a specified size, applying a concentrated load to the specimen at the mid-span until it breaks. The flexural strength of the specimen (in MPa) is obtained from the maximum load at failure, and the failure flexural tensile strain of the asphalt mixture is obtained from the mid-span deflection at failure. The ratio of the two is the bending stiffness modulus at failure (in MPa). Therefore, it is necessary to develop a device for detecting the bending performance of asphalt mixture. After retrieval, no technical solution identical to the present utility model has been found. Content of the Utility Model

[0004] The main technical problem to be solved by the present utility model is to provide a device for detecting the bending performance of asphalt mixture, solving one or more of the above-mentioned prior art problems.

[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: a device for detecting the bending performance of asphalt mixture, the innovation of which lies in: including

[0006] A bottom plate, on the upper surface of which there is an installation groove;

[0007] A three-dimensional laser scanner, which is assembled in the installation groove;

[0008] A light-transmitting plate, which closes the top of the installation groove;

[0009] A guide rail group, which is arranged on the upper surface of the bottom plate. The guide rail group includes a first guide rail and a second guide rail. The first guide rail and the second guide rail are parallel and symmetrically arranged on both sides of the installation groove;

[0010] A support unit, which is assembled on the guide rail group and can slide along the guide rail group;

[0011] A driving unit, which is installed on the bottom plate. The driving unit is used to drive the first support block and the second support block to slide on the guide rail group;

[0012] A pressing-down component, which is installed on the bottom plate. The pressing-down component includes a first guide post and a second guide post. The connection line of the first guide post and the second guide post divides the installation groove into two left-right mirror-symmetrical parts. The pressing-down component further includes a guide plate, and a pressing block is assembled at the bottom of the guide plate.

[0013] In some embodiments, the supporting unit includes a first supporting block and a second supporting block. A first balancing block is provided on the top of the first supporting block, and a second balancing block is provided on the top of the second supporting block. The top surfaces of the first balancing block and the second balancing block are flat, and the bottom surfaces of the first balancing block and the second balancing block are curved. The two ends of the first balancing block are movably connected to the first supporting block, and the two ends of the second balancing block are movably connected to the second supporting block. The first balancing block and the second balancing block are of equal height and arranged parallel to each other. The extending direction of the first balancing block and the second balancing block is perpendicular to the extending direction of the guide rail group.

[0014] In some embodiments, the driving unit includes a first air cylinder, the output end of the first air cylinder is fixedly connected to the back surface of the first supporting block, and the output end of the second air cylinder is fixedly connected to the back surface of the second supporting block.

[0015] The beneficial effects of the present utility model are as follows: In this technical solution, a three-dimensional laser scanner is used to obtain the deformation curve of the asphalt mixture after being stressed. Then, by combining the time change of the downward pressure and the time change of the deformation curve of the asphalt mixture, the bending performance of the asphalt mixture is comprehensively analyzed. The structure and data of this technical solution are systematic, improving the measurement efficiency and accuracy. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is the front view of a device for detecting the bending performance of an asphalt mixture according to the present utility model.

[0018] Figure 2 is Figure 1 the sectional view taken along the A-A direction in

[0019] Figure 3 is the top view of a device for detecting the bending performance of an asphalt mixture according to the present utility model.

[0020] Figure 4 is the axonometric view of a device for detecting the bending performance of an asphalt mixture according to the present utility model. Detailed implementation mode

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figures 1 to 4 shown, the embodiments of the present utility model include:

[0023] A device for detecting the bending performance of asphalt mixture, including

[0024] A bottom plate 100, on the upper surface of which there is an installation groove 101;

[0025] A three-dimensional laser scanner 200, which is assembled in the installation groove 101;

[0026] A light-transmitting plate 300, which closes the top of the installation groove 101;

[0027] A guide rail group, which is arranged on the upper surface of the bottom plate 100. The guide rail group includes a first guide rail 401 and a second guide rail 402. The first guide rail 401 and the second guide rail 402 are parallel to each other and symmetrically arranged on both sides of the installation groove 101;

[0028] A support unit, which is assembled on the guide rail group and can slide along the guide rail group;

[0029] A driving unit, which is installed on the bottom plate 100. The driving unit is used to drive the first support block 501 and the second support block 502 to slide on the guide rail group;

[0030] A downward pressing assembly, which is installed on the bottom plate 100. The downward pressing assembly includes a first guide post 701 and a second guide post 702. The connection line of the first guide post 701 and the second guide post 702 divides the installation groove 101 into two left-right mirror-image symmetrical parts. The downward pressing assembly further includes a guide plate 703, and a pressing block 704 is assembled at the bottom of the guide plate 703.

[0031] In some embodiments, the support unit includes a first support block 501 and a second support block 502. A first balance block 503 is provided on the top of the first support block 501, and a second balance block 504 is provided on the top of the second support block 502. The top surfaces of the first balance block 503 and the second balance block 504 are flat, and the bottom surfaces of the first balance block 503 and the second balance block 504 are curved. The two ends of the first balance block 503 are movably connected to the first support block 501, and the two ends of the second balance block 504 are movably connected to the second support block 502. The first balance block 503 and the second balance block 504 are of the same height and are arranged parallel to each other. The extending direction of the first balance block 503 and the second balance block 504 is perpendicular to the extending direction of the guide rail group.

[0032] In some embodiments, the driving unit includes a first cylinder 601. The output end of the first cylinder 601 is fixedly connected to the back surface of the first support block 501, and the output end of the second cylinder 602 is fixedly connected to the back surface of the second support block 502.

[0033] The beneficial effect of the present utility model is that: this technical solution uses a three-dimensional laser scanner 200 to measure the deformation curve of asphalt mixture after being stressed, and then combines the time change of the downward pressure and the time change of the deformation curve of the asphalt mixture to comprehensively analyze the bending performance of the asphalt mixture. The structure and data of this technical solution are systematic, improving the efficiency and accuracy of measurement.

[0034] The working principle of this technical solution is: first, according to the length of the asphalt mixture sample, the distance between the first support block 501 and the second support block 502 is adjusted, and at the same time, the distance from the first support block 501 to the center point is made equal to the distance from the second support block 502 to the center point. Then, the asphalt mixture is placed on the first balance block 503 and the second balance block 504, and the three-dimensional laser scanner 200 starts to record the bottom deformation curve of the asphalt mixture in real time. Through the docking of an external press with the downward pressing assembly, the press drives the pressing block 704 to move downward, gradually applying pressure to the top central axis of the asphalt mixture until the asphalt mixture collapses, completing data collection.

[0035] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A device for detecting the bending properties of asphalt mixture, characterized in that: include A bottom plate (100), wherein a mounting groove (101) is provided on an upper surface of the bottom plate (100); A three-dimensional laser scanner (200), wherein the three-dimensional laser scanner (200) is mounted in the mounting groove (101); A light-transmitting plate (300), the light-transmitting plate (300) sealing the top of the installation groove (101); A guide rail group, the guide rail group is arranged on the upper surface of the bottom plate (100), the guide rail group comprises a first guide rail (401) and a second guide rail (402), the first guide rail (401) and the second guide rail (402) are parallel to each other and symmetrically arranged on both sides of the installation groove (101); A support unit, which is mounted on the guide rail assembly and can slide along the guide rail assembly; A driving unit, the driving unit being mounted on the bottom plate (100), the driving unit being used to drive the first supporting block (501) and the second supporting block (502) to slide on the guide rail assembly; A pressing assembly is installed on a base plate (100), the pressing assembly comprises a first guide column (701) and a second guide column (702), the connection line between the first guide column (701) and the second guide column (702) divides the installation groove (101) into two parts which are mirror-imaged on the left and right, the pressing assembly also comprises a guide plate (703), the bottom of the guide plate (703) is equipped with a pressing block (704).

2. The device for detecting the bending properties of asphalt mixture according to claim 1, characterized in that: The support unit comprises a first support block (501) and a second support block (502); a first balancing block (503) is arranged on the top of the first support block (501); a second balancing block (504) is arranged on the top of the second support block (502); the top surfaces of the first balancing block (503) and the second balancing block (504) are planes; the bottom surfaces of the first balancing block (503) and the second balancing block (504) are curved surfaces; two ends of the first balancing block (503) are movably connected to the first support block (501); two ends of the second balancing block (504) are movably connected to the second support block (502); the first balancing block (503) and the second balancing block (504) are of the same height and are arranged parallel to each other; and the extension direction of the first balancing block (503) and the second balancing block (504) is perpendicular to the extension direction of the guide rail group.

3. The device for detecting the bending properties of asphalt mixture according to claim 1, characterized in that: The driving unit comprises a first cylinder (601), the output end of the first cylinder (601) is fixedly connected to the back side of the first support block (501), and the output end of the second cylinder (602) is fixedly connected to the back side of the second support block (502).

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