Special strength rebound apparatus for high-content mineral admixture concrete

Abstract

The utility model relates to the technical field of rebound apparatuses, in particular to a special strength rebound apparatus for high-volume mineral admixture concrete. According to the technical scheme, the rebounding instrument comprises a rebounding instrument body and a reading plate, the reading plate is fixedly installed on the upper surface of the rebounding instrument body, an observation opening is formed in the upper surface of the reading plate, and scale marks are arranged on the positions, located on the two sides of the observation opening, of the upper surface of the reading plate. Fixed number scales and a sliding groove are formed in the positions, close to the two scale marks, of the upper surface of the reading plate respectively, a sliding block is installed in the sliding groove in a sliding mode, a sliding plate is fixedly installed on the upper surface of the sliding block, and sliding number scales are arranged on the upper surface of the sliding plate. According to the utility model, the reading scales on the traditional rebound apparatus can be adjusted so as to adapt to the strength of the large-volume mineral admixture concrete, the detection error is reduced, and the reliability of the strength evaluation of the large-volume mineral admixture concrete is improved.

Description

Technical Field

[0001] This utility model relates to the field of rebound hammer technology, specifically a strength rebound hammer for concrete with large amounts of mineral admixtures. Background Technology

[0002] With the deepening of the concept of sustainable development, the application of high-volume mineral admixture concrete in construction projects is receiving increasing attention. Mineral admixtures such as fly ash and slag powder have advantages such as reducing cement usage, reducing environmental pollution, and improving concrete durability. The use of high-volume mineral admixtures in concrete production has become a trend in some large-scale infrastructure construction and green building projects.

[0003] Currently, the rebound hammer test is a common method for testing the strength of solid structures. While it offers a certain degree of reliability for traditional concrete, it has limitations for concrete with high mineral admixture content. The main issues are as follows: First, the rebound hammer method estimates compressive strength based on the surface hardness of the concrete. The primary influencing factors are the surface carbonation depth and hydration degree of the concrete component. As the carbonation depth increases, the assessed strength of the concrete decreases sharply. Therefore, the accuracy of carbonation measurement is crucial. For concrete with high mineral admixture content, the hydration reaction of the admixtures reduces the alkalinity of the concrete, but the resulting substances do not increase the concrete's hardness, leading to a "false" increase in strength. The text discusses several issues related to concrete with high mineral admixture content. It mentions two problems: first, the lack of curing or inadequate curing after pouring high-volume mineral admixture concrete, resulting in insufficient hydration of cement on the concrete surface. The text notes that the concrete surface lacks "Ca(OH)2," exhibiting low alkalinity or even neutrality, and thus does not show signs of "carbonation." The text also mentions the low rebound strength of high-volume mineral admixture concrete due to its porous nature. Finally, it proposes a special strength rebound hammer for high-volume mineral admixture concrete. Utility Model Content

[0004] The purpose of this invention is to provide a special strength rebound hammer for concrete with high mineral admixture content. It has the advantages of being able to adjust the reading scale on the traditional rebound hammer to adapt to the strength of concrete with high mineral admixture content, reducing detection errors, and improving the reliability of strength assessment of concrete with high mineral admixture content. It solves the problem that the strength value reading on the traditional rebound hammer has a large detection error relative to the strength detection of concrete with high mineral admixture content.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rebound hammer for high-volume mineral admixture concrete, comprising a rebound hammer body and a reading plate. The reading plate is fixedly installed on the upper surface of the rebound hammer body. An observation port is located on the upper surface of the reading plate. Scale lines are provided on both sides of the observation port on the upper surface of the reading plate. Fixed numerical scales and grooves are respectively provided on the upper surface of the reading plate near the two scale lines. A slider is slidably installed inside the groove. A sliding plate is fixedly installed on the upper surface of the slider. A sliding numerical scale is provided on the upper surface of the sliding plate.

[0006] Preferably, a transparent plate is fixedly installed inside the observation port. The transparent plate seals the observation port, allowing the pointer on the rebound hammer body to be observed through the transparent plate and the reading to be made according to the scale line.

[0007] Preferably, a magnetic suction plate is fixedly installed at the bottom of the inner wall of the slide groove, and the slider is fixed inside the slide groove by the magnetic attraction between the slider and the magnetic suction plate. The magnetic attraction between the magnetic suction plate and the slider can quickly fix the moved slider.

[0008] Preferably, the upper surface of the slider is provided with a threaded hole, and a screw is movably inserted into the threaded hole. A knob is fixedly connected to one end of the screw located outside the slide groove, and the other end of the screw located inside the slide groove contacts the upper surface of the magnetic plate. By turning the knob, the end of the screw located inside the slide groove presses against the magnetic plate, thereby fixing the slider and the slide plate in place to prevent them from sliding.

[0009] Preferably, the groove is a dovetail groove, and the slider is a dovetail block, which can prevent the slider from slipping out of the groove when the screw is turned.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model, by setting up a rebound hammer body, reading plate, scale lines, fixed digital scale, groove, slider, sliding plate, and sliding digital scale, achieves the effect of adjusting the reading scale on the traditional rebound hammer to adapt to the strength of concrete with high mineral admixture content, reducing detection errors, and improving the reliability of strength assessment of concrete with high mineral admixture content. When testing the strength of traditional concrete with the rebound hammer body, the reading can be taken through the fixed digital scale and scale lines. When testing the strength of concrete with high mineral admixture content, the slider slides inside the groove to adjust the position of the sliding digital scale on the upper surface of the sliding plate, thereby adjusting the corresponding position between the sliding digital scale and the scale lines. When the rebound hammer body tests the strength of concrete with high mineral admixture content, the reading is taken through the sliding digital scale to revise the strength value of concrete with high mineral admixture content. Thus, it is suitable for both traditional concrete strength testing and strength testing of concrete with high mineral admixture content.

[0012] 2. By setting a magnetic suction plate, the magnetic attraction between the magnetic suction plate and the slider can quickly fix the moved sliding plate.

[0013] 3. This utility model achieves the effect of preventing the sliding plate and slider from sliding inside the groove after adjustment by setting threaded holes, screws and knobs. After turning the screw by the knob, the end of the screw inside the groove presses against the magnetic plate, which can fix the slider and sliding plate in place to prevent them from sliding. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partial three-dimensional structural diagram of the reading plate of this utility model;

[0016] Figure 3 This is a partial three-dimensional structural diagram of the sliding plate of this utility model.

[0017] Reference numerals in the attached diagram: 1. Main body of the rebound hammer; 2. Reading plate; 3. Sliding plate; 4. Fixed digital scale; 5. Observation port; 6. Transparent plate; 7. Scale line; 8. Slide groove; 9. Magnetic plate; 10. Sliding digital scale; 11. Slider; 12. Threaded hole; 13. Screw; 14. Knob. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] like Figures 1-3As shown, this utility model proposes a high-volume mineral admixture concrete strength rebound hammer, which includes a rebound hammer body 1 and a reading plate 2. The reading plate 2 is fixedly installed on the upper surface of the rebound hammer body 1. The upper surface of the reading plate 2 has an observation port 5. A transparent plate 6 is fixedly installed inside the observation port 5. The reading pointer on the rebound hammer body 1 can be observed through the transparent plate 6 inside the observation port 5. Scale lines 7 are provided on both sides of the upper surface of the reading plate 2 at the observation port 5. The scale lines 7 are used in conjunction with the reading pointer to read the value. Fixed numerical scales 4 and grooves 8 are respectively provided on the upper surface of the reading plate 2 near the two scale lines 7. A slider 11 is slidably installed inside the groove 8. A sliding plate 3 is fixedly installed on the upper surface of the slider 11. A sliding numerical scale 10 is provided on the upper surface of the sliding plate 3.

[0021] When this invention is in use, the strength of traditional concrete is tested by the rebound hammer body 1 using fixed digital scale 4 and scale line 7. When testing the strength of concrete with a large amount of mineral admixture, the slider 11 slides inside the slide groove 8 to adjust the position of the sliding digital scale 10 on the upper surface of the sliding plate 3, thereby adjusting the corresponding position between the sliding digital scale 10 and the scale line 7. When the rebound hammer body 1 tests the strength of concrete with a large amount of mineral admixture, the strength value of the concrete with a large amount of mineral admixture is revised by reading the sliding digital scale 10. This invention is suitable for both traditional concrete strength testing and concrete with a large amount of mineral admixture.

[0022] Example 2

[0023] like Figure 2 and Figure 3 As shown, the present invention proposes a high-volume mineral admixture concrete strength rebound hammer. Compared with the first embodiment, this embodiment also includes a magnetic suction plate 9 fixedly installed at the bottom of the inner wall of the chute 8, and the slider 11 is fixed inside the chute 8 by the magnetic attraction between it and the magnetic suction plate 9.

[0024] In this embodiment, when adjusting the position of the sliding plate 3 by sliding the slider 11 inside the slide groove 8, the magnetic attraction between the magnetic plate 9 and the slider 11 can be used to quickly fix the moved sliding plate 3.

[0025] Example 3

[0026] like Figure 2 and Figure 3As shown, the present invention proposes a high-volume mineral admixture concrete strength rebound hammer. Compared with Embodiment 1, this embodiment further includes a threaded hole 12 on the upper surface of the slider 11, a screw 13 movably inserted into the threaded hole 12, a knob 14 fixedly connected to one end of the screw 13 outside the slide groove 8, and the other end of the screw 13 inside the slide groove 8 contacting the upper surface of the magnetic plate 9. The slide groove 8 is a dovetail groove, and the slider 11 is a dovetail block to prevent the slider 11 from slipping out of the slide groove 8 when the screw 13 is turned.

[0027] In this embodiment, after turning the screw 13 by the knob 14, the end of the screw 13 located inside the slide groove 8 presses against the magnetic plate 9, which can fix the slider 11 and the sliding plate 3 to prevent the slider 11 and the sliding plate 3 from sliding.

[0028] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A rebound hammer for concrete with high mineral admixture content, comprising a rebound hammer body (1) and a reading plate (2), characterized in that: A reading plate (2) is fixedly installed on the upper surface of the main body (1) of the rebound hammer. An observation port (5) is provided on the upper surface of the reading plate (2). Scale lines (7) are provided on both sides of the observation port (5) on the upper surface of the reading plate (2). Fixed digital scales (4) and a slide groove (8) are respectively provided on the upper surface of the reading plate (2) near the two scale lines (7). A slider (11) is slidably installed inside the slide groove (8). A sliding plate (3) is fixedly installed on the upper surface of the slider (11). A sliding digital scale (10) is provided on the upper surface of the sliding plate (3).

2. The concrete strength rebound hammer with high mineral admixture content according to claim 1, characterized in that: A transparent plate (6) is fixedly installed inside the observation port (5).

3. The concrete strength rebound hammer with high mineral admixture content according to claim 1, characterized in that: A magnetic suction plate (9) is fixedly installed at the bottom of the inner wall of the slide groove (8), and the slider (11) is fixed inside the slide groove (8) by magnetic attraction with the magnetic suction plate (9).

4. A concrete strength rebound hammer with high mineral admixture content according to claim 3, characterized in that: The upper surface of the slider (11) is provided with a threaded hole (12), and a screw (13) is movably inserted into the threaded hole (12). A knob (14) is fixedly connected to one end of the screw (13) outside the slide groove (8), and the other end of the screw (13) inside the slide groove (8) is in contact with the upper surface of the magnetic plate (9).

5. A concrete strength rebound hammer with high mineral admixture content according to claim 4, characterized in that: The groove (8) is a dovetail groove, and the slider (11) is a dovetail block.

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