Testing device for compression-resistant and carbonization-resistant recycled concrete

Abstract

The utility model relates to the technical field of concrete testing, and discloses a compressive and anti-carbonization recycled concrete testing device, which comprises a device box and a compressive testing mechanism, the inner wall of the device box is fixedly connected with partition plates, the partition plates divide the device box into a chamber A, a chamber B, a chamber C and a chamber D. The inner wall of the chamber B is fixedly connected with a partition plate, and the partition plate is fixedly connected with the compressive testing mechanism. A partition plate is arranged in the chamber A, the chamber C and the chamber D, a through hole is formed in the partition plate, six extrusion telescopic rods are fixedly connected to the inner wall of the through hole, the extrusion telescopic rods are sleeved with extrusion springs, and the telescopic ends of the two extrusion telescopic rods are fixedly connected with an extrusion box. The hydraulic telescopic rod is started, the hydraulic telescopic rod drives the pressing plate to move, compression resistance testing is conducted on concrete test pieces in different environments, a conclusion is obtained through comparison, the situation that multiple experiments are needed for comparison under different conditions is eliminated, the experiment process is simplified, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete testing, in particular to a testing device for compression-resistant and carbonization-resistant recycled concrete. Background Art

[0002] Recycled concrete refers to the new concrete made by crushing, cleaning and grading discarded concrete blocks, mixing them with grading in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregate), and then adding cement, water, etc. Recycled concrete can be made into the following types of concrete according to the combination of aggregates: all aggregates are recycled aggregates; coarse aggregates are recycled aggregates and fine aggregates are natural sand; coarse aggregates are natural crushed stone or pebbles and fine aggregates are recycled aggregates; recycled aggregates replace part of coarse aggregates or fine aggregates.

[0003] At present, in order to find out the various performance conditions of recycled concrete under various special circumstances, researchers usually improve the performance of recycled concrete by changing the mix ratio without changing other ingredients. However, the components in the environment interfere with the experiment to different degrees at different times. Since the experiments cannot be carried out synchronously, the accuracy of the test results decreases. Moreover, since multiple experiments are required for comparison under different circumstances, the experimental process is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a testing device for compressive and carbonation-resistant recycled concrete, which has the advantages of reducing the interference of the environment on the experiment and not requiring multiple experiments for comparison. It solves the problem that the components in the environment interfere with the experiment to different degrees at different times, and the accuracy of the test results is reduced due to the inability to conduct experiments synchronously. In addition, since multiple experiments need to be compared under different circumstances, the experimental process is cumbersome, time-consuming and labor-intensive.

[0005] The utility model provides the following technical scheme: a test device for compressive and carbonation-resistant recycled concrete, comprising a device box and a compressive test mechanism, a partition plate is fixedly connected to the inner wall of the device box, the partition plate divides the device box into chamber A, chamber B, chamber C and chamber D, an isolation plate is fixedly connected to the inner wall of chamber B, a through hole is opened on the isolation plate, six extrusion telescopic rods are fixedly connected to the inner wall of the through hole, an extrusion spring is sleeved on the extrusion telescopic rod, the telescopic ends of two of the extrusion telescopic rods are fixedly connected to the extrusion box, four filter plates are fixedly connected to the inner wall of the device box, one end of the filter plate is fixedly connected to the side wall of the partition plate, the anti The pressure testing mechanism includes a limit box, which is fixedly connected to the upper end surface of the filter plate, and two elastic telescopic rods are fixedly connected to the inner wall of the limit box, and a return spring is sleeved on the elastic telescopic rod, and the telescopic end of the elastic telescopic rod is fixedly connected to a support plate, and the right end of the support plate is fixedly connected to a rotating rod, and the rotating rod is rotatably connected to the side wall of the limit box, and the upper end surface of the device box is fixedly connected to a cover plate, and the lower end surface of the cover plate is fixedly connected to a hydraulic telescopic rod, and the telescopic end of the hydraulic telescopic rod is fixedly connected to a pressure plate, and the lower end surface of the cover plate is fixedly connected to a guide rod, and the lower part of the guide rod passes through the pressure plate and rests on the upper end surface of the filter plate.

[0006] Preferably, the interior of room A is set to a low concentration of carbon dioxide, the interior of the front side of the isolation panel in room B is set to a high concentration of carbon dioxide, the interior of the rear side of the isolation panel in room B is set to a low concentration of carbon dioxide, the interior of room C is set to a high concentration of carbon dioxide, and the interior of room D is set to the same concentration of carbon dioxide as the outside world.

[0007] Preferably, a No. 1 air hole is opened on the side wall between chamber A and chamber B, a No. 2 air hole is opened on the side wall between chamber C and chamber B, a pressure resistance testing mechanism is arranged in chamber C, and a pressure resistance testing mechanism is arranged in chamber D.

[0008] Preferably, a sliding groove is provided on the side wall of the device box, a movable box is slidably connected to the inner wall of the sliding groove, four gravel grooves are provided on the side wall of the movable box, the size of the gravel grooves matches that of chamber A, chamber C, chamber C and chamber D, a filter plate is fixedly connected to the inner wall of the gravel groove, and a handle is fixedly connected to the side wall of the movable box.

[0009] Preferably, a carbon dioxide concentration controller is fixedly connected to the side wall of the device box, an observation port is opened on the side wall of the device box, and an observation window is rotatably connected to the inner wall of the device box.

[0010] Preferably, both ends of the return spring are fixedly connected to the upper end surface of the filter plate and the lower end surface of the support plate, and both ends of the extrusion spring are fixedly connected to the inner wall of the extrusion box and the side wall of the isolation plate, and a sealing sleeve is provided on the extrusion box.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By placing the concrete specimens on the support plates in Room A, Room C and Room D for curing for 28 days, the hydraulic telescopic rod is started, and the hydraulic telescopic rod drives the pressure plate to move, and the compression test is carried out on the concrete specimens in different environments. The conclusion is drawn through comparison, which eliminates the need for multiple experiments to compare different situations, simplifies the experimental process, and saves time and effort.

[0013] 2. By passing a concrete specimen of twice the size through the isolation plate, the concrete specimen pushes the extrusion spring to move, and the extrusion spring drives the sealing sleeve to move. The extrusion spring generates pressure to squeeze the concrete specimen to ensure its sealing. After 28 days of maintenance, it is tested for carbon dioxide concentration and carbon resistance, which avoids the different degrees of interference of the components in the environment at different times on the experiment. The experiment is carried out synchronously, which improves the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model at EE.

[0018] In the figure: 1. device box; 2. air inlet pipe; 3. observation window; 4. handle; 5. movable box; 6. carbon dioxide concentration controller; 7. isolation plate; 8. extrusion box; 9. partition plate; 10. hydraulic telescopic rod; 11. pressure plate; 12. guide rod; 13. limit box; 14. support plate; 15. elastic telescopic rod; 16. return spring; 17. extrusion telescopic rod; 18. extrusion spring; 19. cover plate; 20. filter plate; 21. chamber A; 22. chamber B; 23. chamber C; 24. chamber D. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 4 The test device for compressive and carbonation-resistant recycled concrete comprises a device box 1 and a compressive test mechanism. A partition plate 9 is fixedly connected to the inner wall of the device box 1. The partition plate 9 divides the device box 1 into an A chamber 21, a B chamber 22, a C chamber 23 and a D chamber 24. An isolation plate 7 is fixedly connected to the inner wall of the B chamber 22. A through hole is opened on the isolation plate 7. Six extrusion telescopic rods 17 are fixedly connected to the inner wall of the through hole. An extrusion spring 18 is sleeved on the extrusion telescopic rod 17. The telescopic ends of the two extrusion telescopic rods 17 are The device box 1 is fixedly connected with an extrusion box 8, and four filter plates 20 are fixedly connected to the inner wall of the device box 1. One end of the filter plate 20 is fixedly connected to the side wall of the partition plate 9. The compression test mechanism includes a limit box 13, which is fixedly connected to the upper end surface of the filter plate 20. Two elastic telescopic rods 15 are fixedly connected to the inner wall of the limit box 13. A reset spring 16 is sleeved on the elastic telescopic rod 15. The telescopic end of the elastic telescopic rod 15 is fixedly connected to a support plate 14. The right end of the support plate 14 is fixedly connected to the A rotating rod is connected, and the rotating rod is rotatably connected to the side wall of the limit box 13. The upper end surface of the device box 1 is fixedly connected with a cover plate 19, and the lower end surface of the cover plate 19 is fixedly connected with a hydraulic telescopic rod 10. The telescopic end of the hydraulic telescopic rod 10 is fixedly connected with a pressing plate 11. The lower end surface of the cover plate 19 is fixedly connected with a guide rod 12. The lower part of the guide rod 12 penetrates the pressing plate 11 and abuts against the upper end surface of the filter plate 20. The concrete specimen is placed on the support plate 14 in the A chamber 21, the C chamber 23 and the D chamber 24. After 28 days of maintenance, the hydraulic telescopic rod 10 is started, and the hydraulic telescopic rod 10 drives the pressure plate 11 to move, and the concrete specimens in different environments are subjected to compression tests. The conclusion is drawn through comparison, eliminating the need for multiple experiments for comparison under different conditions, simplifying the experimental process, saving time and labor, and after the concrete specimen is crushed, the concrete is broken and scattered, causing the weight on the support plate 14 to drop, and the reset spring 16 resets the support plate 14 to flip over, so that the gravel on the support plate 14 is poured out to achieve cleaning;

[0021] The A chamber 21 is set to have a low concentration of carbon dioxide, the B chamber 22 is set to have a high concentration of carbon dioxide in front of the isolation plate 7, the B chamber 22 is set to have a low concentration of carbon dioxide in the back of the isolation plate 7, the C chamber 23 is set to have a high concentration of carbon dioxide, and the D chamber 24 is set to have the same concentration of carbon dioxide as the outside. The concentrations of carbon dioxide in the A chamber 21, the B chamber 22, and the C chamber 23 are changed through the air inlet pipe 2, and the compressive strength of the A chamber 21, the C chamber 23, and the D chamber 24 are compared, so that experiments can be carried out at the same time, thereby improving the experimental results. The accuracy of the test is improved. A first air hole is provided on the side wall between chamber A 21 and chamber B 22. A second air hole is provided on the side wall between chamber C 23 and chamber B 22. A pressure test mechanism is provided in chamber C 23. A pressure test mechanism is provided in chamber D 24. The first air hole makes the concentration of carbon dioxide in chamber A 21 the same as the concentration of carbon dioxide on the rear side of the isolation plate 7 in chamber B 22. The second air hole makes the concentration of carbon dioxide in chamber C 23 the same as the concentration of carbon dioxide on the front side of the isolation plate 7 in chamber B 22. The device box 1 A sliding groove is provided on the side wall, and a movable box 5 is slidably connected to the inner wall of the sliding groove. Four gravel grooves are provided on the side wall of the movable box 5. The sizes of the gravel grooves match those of chamber A 21, chamber C 23, chamber C 23 and chamber D 24. A handle 4 is fixedly connected to the side wall of the movable box 5. After the pressing plate 11 crushes the concrete specimen, the gravel on the support plate 14 is ejected by the return spring 16 and falls into the movable box 5. The gravel is taken out by pulling the handle 4. A carbon dioxide concentration controller 6 is fixedly connected to the side wall of the device box 1. An observation port is provided on the side wall of the device box 1, and an observation window 3 is rotatably connected to the inner wall of the device box 1. The concentration of carbon dioxide is controlled by the carbon dioxide concentration controller 6, and the material is discharged and observed through the observation window 3. The two ends of the reset spring 16 are fixedly connected to the upper end surface of the filter plate 20 and the lower end surface of the support plate 14, and the two ends of the extrusion spring 18 are fixedly connected to the inner wall of the extrusion box 8 and the side wall of the isolation plate 7. A sealing sleeve is provided on the extrusion box 8, and the reset spring 16 and the extrusion spring 18 both play a resetting role.

[0022] Working principle: the relative humidity in the regulating device box 1 should not be less than 50%, the temperature is maintained at 20℃±5℃, the carbon dioxide concentration in the high concentration is 20%±5%, and the carbon dioxide concentration in the low concentration is 3%±1%. When the device is working, the concrete specimen is placed on the support plate 14 in the A chamber 21, the C chamber 23 and the D chamber 24 for curing for 28 days, the hydraulic telescopic rod 10 is started, and the hydraulic telescopic rod 10 drives the pressing plate 11 to move, and the compression test is carried out on the concrete specimens in different environments. The conclusion is drawn through comparison, which eliminates the need for multiple experiments to compare different situations, simplifies the experimental process, saves time and effort, and at the same time, the concrete specimen of twice the volume passes through the isolation plate 7, the concrete specimen pushes the extrusion spring 18 to move, the extrusion spring 18 drives the sealing sleeve to move, and the extrusion spring 18 generates pressure to squeeze the concrete specimen to ensure its sealing. After curing for 28 days, the carbon dioxide concentration carbon resistance test is carried out on it, which avoids the different interference levels of the components in the environment on the experiment at different times, and the experiment is carried out synchronously, which improves the accuracy of the test results.

Claims

1. A testing device for compression and carbonation resistance of recycled concrete, comprising a device box (1) and a compression testing mechanism, characterized in that: A partition plate (9) is fixedly connected to the inner wall of the device box (1), and the partition plate (9) divides the device box (1) into chamber A (21), chamber B (22), chamber C (23) and chamber D (24). An isolation plate (7) is fixedly connected to the inner wall of chamber B (22), and a through hole is formed on the isolation plate (7). Six extrusion telescopic rods (17) are fixedly connected to the inner wall of the through hole, and an extrusion spring (18) is sleeved on the extrusion telescopic rod (17). The telescopic ends of two of the extrusion telescopic rods (17) are fixedly connected to the extrusion box (8). Four filter plates (20) are fixedly connected to the inner wall of the device box (1), and one end of the filter plate (20) is fixedly connected to the side wall of the partition plate (9). The pressure resistance test mechanism comprises a limit box (13), and the limit box (13) is fixedly connected to the through hole. The upper end surface of the filter plate (20), the inner wall of the limit box (13) is fixedly connected with two elastic telescopic rods (15), the elastic telescopic rods (15) are sleeved with a return spring (16), the telescopic ends of the elastic telescopic rods (15) are fixedly connected with a support plate (14), the right end of the support plate (14) is fixedly connected with a rotating rod, and the rotating rod is rotatably connected to the side wall of the limit box (13), the upper end surface of the device box (1) is fixedly connected with a cover plate (19), the lower end surface of the cover plate (19) is fixedly connected with a hydraulic telescopic rod (10), the telescopic end of the hydraulic telescopic rod (10) is fixedly connected with a pressing plate (11), the lower end surface of the cover plate (19) is fixedly connected with a guide rod (12), the lower part of the guide rod (12) passes through the pressing plate (11) and abuts against the upper end surface of the filter plate (20).

2. The testing device for compressive and carbonation-resistant recycled concrete according to claim 1, characterized in that: The A chamber (21) is set to have a low concentration of carbon dioxide, the B chamber (22) is set to have a high concentration of carbon dioxide on the front side of the isolation plate (7), the B chamber (22) is set to have a low concentration of carbon dioxide on the rear side of the isolation plate (7), the C chamber (23) is set to have a high concentration of carbon dioxide, and the D chamber (24) is set to have a carbon dioxide concentration the same as that of the outside.

3. The testing device for compressive and carbonation-resistant recycled concrete according to claim 1, characterized in that: A first air hole is provided on the side wall between the A chamber (21) and the B chamber (22), a second air hole is provided on the side wall between the C chamber (23) and the B chamber (22), a pressure resistance testing mechanism is provided in the C chamber (23), and a pressure resistance testing mechanism is provided in the D chamber (24).

4. The testing device for compressive and carbonation-resistant recycled concrete according to claim 1, characterized in that: The side wall of the device box (1) is provided with a sliding groove, the inner wall of the sliding groove is slidably connected to a movable box (5), the side wall of the movable box (5) is provided with four gravel grooves, the sizes of the gravel grooves match those of chamber A (21), chamber C (23), chamber C (23) and chamber D (24), a filter plate (20) is fixedly connected to the inner wall of the gravel groove, and a handle (4) is fixedly connected to the side wall of the movable box (5).

5. The testing device for compressive and carbonation-resistant recycled concrete according to claim 1, characterized in that: A carbon dioxide concentration controller (6) is fixedly connected to the side wall of the device box (1), an observation port is provided on the side wall of the device box (1), and an observation window (3) is rotatably connected to the inner wall of the device box (1).

6. The testing device for compressive and carbonation-resistant recycled concrete according to claim 1, characterized in that: The two ends of the return spring (16) are fixedly connected to the upper end surface of the filter plate (20) and the lower end surface of the support plate (14), and the two ends of the extrusion spring (18) are fixedly connected to the inner wall of the extrusion box (8) and the side wall of the isolation plate (7). The extrusion box (8) is provided with a sealing sleeve.

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