Volume stability testing device for steel slag cement stabilized macadam

Abstract

The utility model provides a device for testing the volume stability of steel slag cement stabilized macadam, which relates to the technical field of concrete detection and comprises a base, a test mold, a laser ranging device, a datum plate and a dial indicator, a test container is positioned above the base, support rods are arranged at two ends of the test container, and a cross rod is transversely arranged on the support rods; a dial indicator is arranged in the longitudinal direction of the center of the cross rod, a leveling plate is connected below the dial indicator and fixed on the cross rod through two adjustable fixing rods, datum plates are arranged on the inner wall of the test container, laser ranging devices are arranged on the inner wall of the test container, and the datum plates correspond to the laser ranging devices one by one in position. According to the utility model, the capability of simultaneous measurement in multiple directions is provided, and the technical problem that cement stabilized macadam is difficult to demould and clean is effectively solved. Through the improvements, the comprehensiveness and accuracy of measurement and the convenience of operation are remarkably improved, and a more efficient and reliable solution is provided for the volume stability test of the steel slag cement stabilized macadam.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of concrete detection, concretely relates to a steel slag cement stabilized macadam volume stability test device. BACKGROUND

[0002] Cement stabilized macadam is a composite material widely used in civil engineering and infrastructure construction, mainly composed of cement, macadam and water mixed in a certain proportion. It combines with macadam particles through the hydration reaction of cement to form a solid soil structure, thereby enhancing its bearing capacity and durability. As an important engineering material, cement stabilized macadam has good volume stability and compressive strength, making it widely used in road, airport runway, parking lot and other engineering. The volume stability performance of cement stabilized macadam is affected by many factors, including cement dosage, macadam particle size, mixed water-cement ratio, environmental temperature and humidity, etc. Compared with traditional macadam materials, cement stabilized macadam not only improves the crack resistance and impermeability, but also effectively reduces the influence of water on the volume change of the material. Therefore, the volume deformation test of cement stabilized macadam is crucial for evaluating its durability, stability and long-term performance.

[0003] The existing method for measuring the volume change of cement stabilized macadam can only test the change in one direction of the cement stabilized macadam, and cannot test the overall volume change of the cement stabilized macadam, which is not accurate for judging the overall volume stability of the cement stabilized macadam. And now the device is difficult to take off from the test equipment after the cement stabilized macadam is formed, and it is not convenient to clean, which has limitations in use. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of steel slag cement stabilized macadam volume stability test device to solve the technical problems of only single direction measurement lacking multi-direction simultaneous measurement capability and cement stabilized macadam demolding and cleaning difficulty in prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme,

[0006] A kind of steel slag cement stabilized macadam volume stability test device, including a test container, laser ranging device is provided on the inner wall of test container, dial gauge is provided above test container, laser ranging device and dial gauge respectively measure the volume change of the side and upper side of test piece in test container.

[0007] The lower end of test container is provided with a base, and the surface of the base is provided with a groove, and the lower end of test container is clamped in the groove for fixation.

[0008] The test container is a cylindrical container spliced by several plates with arc structure.

[0009] The inner wall of the test container is provided with a laser hole, and a laser ranging device is installed in the laser hole.

[0010] The outer side of the diameter of the two ends of the test container is respectively provided with a support rod, and the bottom of the support rod is fixed to the upper surface of the base.

[0011] The upper end of the two support rods at the two ends of the test container is transversely provided with a cross bar, and the two ends of the cross bar are respectively connected and fixed to the upper end of the two support rods.

[0012] A micrometer is arranged at the central position of the cross bar, and the micrometer corresponds to the center point of the test container below.

[0013] The lower end of the micrometer is connected with a leveling plate, and the upper surface of the leveling plate is connected with the cross bar through two adjustable length thin rods.

[0014] The upper end of the test container is provided with a test container fixing device.

[0015] The test container fixing device is a circular ring structure, and the test container fixing device is sleeved on the outer wall of the opening at the upper end of the test container.

[0016] Compared with the prior art, the test device has the following beneficial effects:

[0017] The test device for the volume stability of the steel slag cement stabilized macadam disclosed by the utility model can measure the volume change of the test piece in multiple directions at the same time, solves the problem that only single direction measurement can be realized in the prior art, and improves the comprehensiveness and accuracy of measurement.

[0018] Further, the groove on the base ensures the stability of the test container, reduces movement and errors in the test process, and improves the reliability of the measurement results.

[0019] Further, the test container is designed in a plate block splicing mode, so that the test container is easy to disassemble and clean, the demolding and cleaning difficulties in the prior art are solved, and subsequent reuse is facilitated.

[0020] Further, the cooperation of the reference plate and the laser ranging device provides multiple direction measurement points, and further enhances the comprehensiveness and accuracy of measurement.

[0021] Further, the design of the support rods at the two ends of the test container increases the stability of the whole device, ensures that movement will not occur due to external factors during the measurement process, and improves the reliability of the measurement results.

[0022] Further, the design of the crossbar fixed on the upper end of the two support rods provides a stable installation platform for the micrometer, further enhances the overall stability of the measuring device, and improves the measurement accuracy.

[0023] Further, the design of the micrometer in the central position above the crossbar and the center of the test container ensures the uniformity and symmetry of the measurement, improves the accuracy and reliability of the measurement results.

[0024] Further, the leveling plate is connected below the micrometer, so that the leveling plate can closely contact the surface of the test piece, ensuring the accuracy of the measurement, and through the adjustable thin rod, the position of the leveling plate can be flexibly adjusted to adapt to test pieces of different heights.

[0025] Further, the test container is fixed through the annular fixing device, ensuring the stability of the test container during pouring, preventing the movement of the container, improving the accuracy of the measurement results, and the circular ring structure of the fixing device is simple and reliable, which can effectively prevent the movement of the test container during pouring, ensuring the accuracy of the measurement results. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 : Steel slag cement stabilized macadam volume stability test device structure schematic view;

[0027] Fig. 2 : Steel slag cement stabilized macadam volume stability test device front view structure schematic view;

[0028] Fig. 3 : Steel slag cement stabilized macadam volume stability test device test container schematic view;

[0029] Fig. 4 : Steel slag cement stabilized macadam volume stability test device test container fixing device schematic view.

[0030] Label explanation: 1, base; 2, test container; 3, test container fixing device; 4, reference surface; 5, support rod; 6, micrometer; 7, crossbar; 8, leveling plate; 9 laser ranging device. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. It should be understood that the embodiments are only used to explain the present application and are not limited.

[0032] Reference Figs. 1 to 4As shown, in the steel slag cement stabilized macadam volume stability test device, including a base 1, the base 1 is fixed with test container 2, test container 2 is a cylindrical container, the upper end of test container 2 is provided with test container fixing device 3, test container fixing device 3 is sleeved on the outer wall of the upper end opening of test container 2. A support rod 5 is arranged at the diameter of the test container 2, and the support rod 5 is fixed to the base 1 at the two ends of the test container 2. The upper ends of the two support rods 5 are transversely provided with a cross bar 7, and the two ends of the cross bar 7 are respectively connected and fixed with the upper ends of the two support rods 5. A micrometer 6 is arranged above the test container 2, and the micrometer 6 is arranged on the cross bar 7. The lower end of the micrometer 6 is provided with a leveling plate 8, and the upper surface of the leveling plate 8 is fixed on the cross bar 7 by two adjustable thin rods. A laser ranging device 9 is arranged on the inner wall of the test container 2, and a reference plate 4 is arranged in the test container 2. A plurality of reference plates 4 are arranged uniformly around the inner wall of the test container 2, and the laser ranging device 9 on the inner wall of the test container 2 corresponds to the reference plate 4 one by one.

[0033] The specific implementation method of the steel slag cement stabilized macadam volume stability test device is as follows:

[0034] Place the base 1 on a stable workbench, and set a 5mm deep groove on the upper surface of the base 1. Place the test container 2 into the groove of the base 1 to ensure stability. The test container 2 is a cylindrical container composed of four arc-shaped plates, and the inner diameter of the test container 2 is 150mm and the height is 155mm. The test container 2 and the base 1 are both made of metal material. The test container fixing device 3 is installed on the upper end of the test container 2 to ensure that the container will not move during pouring. A support rod 5 is installed at each end of the diameter of the test container 2, and the support rod 5 is fixed to the base 1. The upper ends of the two support rods 5 are transversely provided with a cross bar 7, and the two ends of the cross bar 7 are respectively connected and fixed with the upper ends of the support rods 5. The micrometer 6 is arranged on the cross bar 7, and the lower end of the micrometer 6 is provided with a leveling plate 8. The leveling plate 8 is fixed on the cross bar 7 by two adjustable length thin rods, so that the leveling plate 8 can be freely adjusted. Before pouring the test piece, arrange two pairs of opposite reference plates 4 around the inner wall of the test container 2. Four laser holes are arranged on the inner wall of the test container 2, and a laser ranging device 9 is arranged in each laser hole. The position of the laser ranging device 9 corresponds to the position of the reference plate 4 one by one, and the reference plate 4 serves as the reference point for measurement. Adjust the position of the leveling plate 8 to an appropriate position to ensure good contact with the surface of the test piece.

[0035] The steel slag cement stabilized macadam material is mixed according to a specified proportion to form a test specimen, the mixed test specimen is poured into the test container 2, and the reference plate 4 is ensured to be tightly attached to the peripheral surface of the test specimen; meanwhile, the position of the length-adjustable leveling plate 8 is adjusted to be tightly attached to the upper surface of the test specimen. After the slurry is preliminarily solidified, the two thin rods connected to the cross rod 7 on the leveling plate 8 are removed, and the leveling plate 8 is kept in the proper position.

[0036] The laser ranging device 9 on the test container 2 is started, the initial distance from the laser hole to the reference plate 4 is recorded, and the initial reading of the dial gauge 6 is read to record the position of the leveling plate 8 at this time. The test specimen continues to harden in the test container 2 to reach a required age. During the hardening process, the laser ranging device 9 and the dial gauge 6 are used for measurement at regular time intervals, and the data of each measurement is recorded. The displacement change in each direction is recorded, and the volume change of the test specimen is calculated. When the required age is reached, the final data of the laser ranging device and the dial gauge 6 are read. By comparing the initial data and the final data, the shrinkage of the test specimen in different directions is calculated, and the overall volume change is calculated. After the test is completed, the test container 2 and other components are disassembled, and all components are cleaned for next use.

[0037] As a further preferred, the test device does not need to move the cement stabilized macadam test specimen during the test process, is simple and convenient to operate and has high accuracy, and can measure the volume change of the cement stabilized macadam.

[0038] As a further preferred, the whole test device can be placed on a rubber pad during the test process to reduce the influence of external vibration factors on the test result. In the utility model, the whole test process can be directly completed in the test mold, the test mold is detachable, and the test mold is more convenient to clean after the test is completed.

[0039] Through the above steps, the volume changes of the steel slag cement stabilized macadam test specimen in different directions can be accurately measured at the same time, and the operation is simple and convenient and has high accuracy. This method not only improves the measurement accuracy, but also provides multi-directional data, and more comprehensively evaluates the volume stability of the test specimen.

[0040] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them, and although the utility model is described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the specific embodiments of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the utility model, and any modification or equivalent replacement without departing from the spirit and scope of the utility model should be covered in the protection scope of the claims of the utility model.

Claims

1. A test device for the volume stability of steel slag cement-stabilized crushed stone, characterized in that, The utility model provides a kind of test container, including a test container (2), laser ranging device (9) is provided on the inner wall of test container (2), dial gauge (6) is provided above test container (2), laser ranging device (9) and dial gauge (6) measure the volume change of the side and above of test piece in test container (2) respectively.

2. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 1, characterized in that, The lower end of the test container (2) is provided with a base (1), the surface of the base (1) is provided with a groove, and the lower end of the test container (2) is clamped in the groove for fixation.

3. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 2, characterized in that, The test container (2) is a cylindrical container spliced by several arc plates.

4. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 3, characterized in that, The inner wall of the test container (2) is provided with a laser hole, and the laser ranging device (9) is installed in the laser hole.

5. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 3, characterized in that, The outer side of the diameter of the test container (2) is provided with a support rod (5) at both ends, and the bottom of the support rod (5) is fixed to the upper surface of the base (1).

6. The steel slag cement stabilized macadam volume stability test device according to claim 5, characterized in that, The upper end of the two support rods (5) at both ends of the test container (2) is provided with a crossbar (7), and the two ends of the crossbar (7) are connected and fixed to the upper end of the two support rods (5).

7. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 6, characterized in that, The center of the crossbar (7) is provided with a dial gauge (6), and the center of the test container (2) corresponds to the dial gauge (6) below.

8. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 7, characterized in that, The lower end of the dial gauge (6) is connected with a leveling plate (8), and the upper surface of the leveling plate (8) is connected with the crossbar (7) through two adjustable length thin rods.

9. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 3, characterized in that, The upper end of the test container (2) is provided with a test container fixing device (3).

10. The device for testing the volume stability of a steel slag cement stabilized macadam according to claim 9, characterized in that, The test container fixing device (3) is a circular ring structure, and the test container fixing device (3) is sleeved on the outer wall of the opening at the upper end of the test container (2).

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