A rapid marking instrument for the elastic modulus of concrete

Abstract

This utility model discloses a rapid marking instrument for the elastic modulus of concrete, belonging to the technical field of special tools for concrete laboratories. It includes a top plate, a first side plate, and a second side plate opposite to the first side plate. The top plate, first side plate, and second side plate are all made of aluminum alloy. Together, they form a U-shaped groove extending along the length direction, defining an internal space for accommodating a standard concrete specimen. This utility model achieves rapid, accurate, and consistent marking of the elastic modulus measurement points on concrete specimens through a standardized rigid clamping structure and pre-set cross-shaped precision positioning through-holes. The square cross-section internal space design allows its inner wall to fit against the surface of a prism-shaped standard specimen, thus enabling the marking of measurement points on the prism-shaped specimen.

Description

Technical Field

[0001] This utility model relates to the technical field of special tools for concrete laboratories, specifically to a rapid marker for the elastic modulus of concrete. Background Technology

[0002] The elastic modulus of concrete is one of the key parameters for evaluating its mechanical properties, and it is of great significance for structural design, quality control, and project acceptance. Currently, the standard method for determining the elastic modulus of concrete (usually referring to the static compressive elastic modulus) (such as GB / T 50081-2019 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete") typically requires the use of prism specimens (standard size 150×150×300mm), and precise marking of measurement points or installation of reference points for displacement gauges at specific positions on two opposite sides of the specimen.

[0003] In existing technologies, marking these measurement points mainly relies on manual positioning and marking with a steel ruler. Manual measurement and marking are prone to visual and operational errors, resulting in inaccurate positions of the marked points or that they are not at the same height / axis, making it difficult to guarantee accuracy. The positions of the marks made by different operators or by the same operator at different times may differ, and the work efficiency is low when marking in batches. Utility Model Content

[0004] The purpose of this invention is to provide a rapid marker for the elastic modulus of concrete to solve the problems of low efficiency, poor accuracy, and difficulty in ensuring consistency of the marking and measurement points mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a rapid marking instrument for the elastic modulus of concrete, including a top plate, a first side plate, and a second side plate opposite to the first side plate. The top plate, the first side plate, and the second side plate are all made of aluminum alloy. Together, they form a U-shaped groove extending along the length direction, defining an internal space for accommodating a standard concrete specimen. The first side plate has a first positioning through hole and a second positioning through hole, which are spaced apart along the length of the first side plate, and their positions match the gauge length requirements for the concrete elastic modulus test.

[0006] Furthermore, the width of the inner side of the top plate, the height of the inner side of the first side plate, and the height of the inner side of the second side plate are all equal, so that the cross-section of the internal space extending along the length direction is square.

[0007] Furthermore, the cross-sectional side length of the internal space is 150mm, and the length extension dimension is 300mm, to accommodate a 150mm×150mm×300mm prism concrete standard specimen.

[0008] Furthermore, both the first and second positioning through holes are cross-shaped through holes. The intersection of the cross-shaped through holes forms the reference point for the marking, and the outline of the cross-shaped through holes is used to guide the marking tool to draw the cross positioning line.

[0009] Furthermore, a first scale and a second scale are engraved on the first side plate. The first scale extends along the length of the first side plate, and the zero point of the first scale is located at the end of the first side plate. The second scale extends along the width of the first side plate, and the zero point of the second scale is located at the connection between the first side plate and the top plate.

[0010] Furthermore, the center intersection of the first positioning through hole is located at the intersection of the 75mm scale line of the first scale and the 75mm scale line of the second scale, and the center intersection of the second positioning through hole is located at the intersection of the 225mm scale line of the first scale and the 75mm scale line of the second scale. The center distance between the first positioning through hole and the second positioning through hole is 150mm.

[0011] Furthermore, the first and second side plates have the same structure and are used for simultaneous marking on both sides of the specimen.

[0012] Furthermore, the concrete elastic modulus rapid marking instrument also includes a handle, which is fixedly mounted on the top plate.

[0013] This utility model has the following advantages over the prior art:

[0014] 1. This utility model achieves rapid, accurate, and consistent marking of the elastic modulus measurement points of concrete specimens through a standardized rigid clamp structure and a pre-set cross-shaped precision positioning through hole. The main body of this utility model is made of lightweight aluminum alloy, with an overall weight of less than 1kg. It can be operated with one hand, overcoming the shortcomings of traditional manual marking methods such as low efficiency, poor accuracy, and difficulty in ensuring consistency. It significantly improves the efficiency and standardization of test preparation.

[0015] 2. This utility model, through its square cross-section internal space design, allows its inner wall to fit against the surface of a prism standard specimen, thereby enabling the marking of measurement points on the prism specimen. Combined with the scale design on the side plate, this utility model ensures rapid marking of standard points while also providing positional reference for operators, enhancing its functionality.

[0016] The aforementioned beneficial effects of this invention lay the foundation for obtaining more reliable and comparable concrete elastic modulus test data. Its structure is simple and easy to operate, and it has good practicality and promotional value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is the left view of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1—Top plate; 21—First side plate; 22—Second side plate;

[0022] 3—Internal space; 41—First positioning through hole; 42—Second positioning through hole;

[0023] 51—First scale; 52—Second scale; 6—Handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] like Figures 1 to 3 As shown in the figure, this utility model embodiment provides a rapid marking instrument for the elastic modulus of concrete, including a top plate 1, a first side plate 21, and a second side plate 22 opposite to the first side plate 21. The top plate 1, the first side plate 21, and the second side plate 22 are all made of aluminum alloy. The top plate 1, the first side plate 21, and the second side plate 22 together form a U-shaped groove extending along the length direction. The U-shaped groove defines an internal space 3, which is used to accommodate a standard concrete specimen. The first side plate 21 has a first positioning through hole 41 and a second positioning through hole 42. The first positioning through hole 41 and the second positioning through hole 42 are distributed at intervals along the length direction of the first side plate 21, and the positions of the first positioning through hole 41 and the second positioning through hole 42 match the measurement gauge length requirements of the concrete elastic modulus test.

[0026] This embodiment is used to assist in marking measurement points on standard concrete elastic modulus specimens. A U-shaped slot structure with a locking function, consisting of a top plate 1, a first side plate 21, and a second side plate 22 opposite to the first side plate 21, matches the concrete specimen to be marked. Then, through the first positioning through-hole 41 and the second positioning through-hole 42, rapid, accurate, and consistent marking of the concrete specimen's elastic modulus measurement points is achieved. In this embodiment, aluminum alloy is selected. Aluminum alloy not only possesses the high hardness and durability of other metals, but its lightweight material also prevents operator fatigue during prolonged operation. The overall weight is less than 1 kg, allowing for operation with one hand.

[0027] like Figure 3 As shown, the width of the inner side of the top plate 1, the height of the inner side of the first side plate 21, and the height of the inner side of the second side plate 22 are all equal, making the cross-section of the internal space 3 extending along its length square. In this embodiment, the side length of the cross-section of the internal space 3 is 150mm, and the length extension dimension is 300mm, to accommodate a 150mm×150mm×300mm prism concrete standard specimen. Using this size in this embodiment, its inner wall can fit snugly against the surface of a 150×150×300mm prism concrete standard specimen, allowing for precise marking of measurement points on the 150×150×300mm concrete standard specimen, thus enhancing functionality.

[0028] In this embodiment, both the first positioning through hole 41 and the second positioning through hole 42 are cross-shaped through holes. The intersection of the cross-shaped through holes forms the reference point for the marking, and the outline of the cross-shaped through holes is used to guide the marking tool to draw the cross positioning lines. Using a pen through the limit of the cross-shaped through holes, cross-shaped marking points can be accurately drawn on the surface of the specimen. The cross shape is more conspicuous and easier to be found and identified by the naked eye than a simple dot. The intersection of the cross lines is the precise positioning point. Compared with a single point (such as a dot), the intersection of the cross lines can more clearly indicate the center point of the target position, greatly reducing the ambiguity of positioning.

[0029] In this embodiment, the first side plate 21 is engraved with a first scale 51 and a second scale 52. The first scale 51 extends along the length of the first side plate 21, and its zero point is located at the end of the first side plate 21. The second scale 52 extends along the width of the first side plate 21, and its zero point is located at the connection between the first side plate 21 and the top plate 1. The scale provides an objective and quantifiable reference, allowing operators or quality inspectors to verify at any time whether the center point of the cross-shaped through hole is accurately aligned with the preset width center point and height position. Through the cooperation of the scale and the positioning through hole, a simple tool that might have been limited by specimen tolerances and fixed designs is transformed into a flexible, precise, and professional instrument that meets stringent testing requirements.

[0030] like Figure 2 As shown, the center intersection of the first positioning through hole 41 is located at the intersection of the 75mm scale line of the first scale 51 and the 75mm scale line of the second scale 52. The center intersection of the second positioning through hole 42 is located at the intersection of the 225mm scale line of the first scale 51 and the 75mm scale line of the second scale 52. The center distance between the first positioning through hole 41 and the second positioning through hole 42 is 150mm. According to the standard method for determining the elastic modulus of concrete in GB / T 50081-2019 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete", the micro-deformation measuring instrument needs to be installed on the center line on both sides of the specimen and symmetrically at both ends of the specimen. The measuring gauge length of the specimen is 150mm. The first positioning through hole 41 and the second positioning through hole 42 are opened on the first side plate 21 at the specified positions, which can mark two measuring points at the same time, thus improving the efficiency of test preparation.

[0031] In this embodiment, the first side plate 21 and the second side plate 22 have the same structure and are used for simultaneous marking on both sides of the specimen. With cross-shaped positioning holes and scales on both side plates, it is not necessary to distinguish between the positive and negative effects of this embodiment during marking operations. Measurement points can be marked simultaneously on opposite sides of the specimen, which not only improves the efficiency of marking measurement points on the specimen surface but also meets the marking requirement in the standard method for determining the elastic modulus of concrete, which requires the micro-deformation measuring instrument to be installed on the center line of both sides of the specimen and symmetrically opposite both ends of the specimen.

[0032] like Figure 1 As shown, in this embodiment, the concrete elastic modulus rapid marking instrument also includes a handle 6, which is fixedly mounted on the top plate 1. The handle allows the operator to lift the instrument with one hand and move it quickly between multiple specimens, improving the efficiency of batch marking. It also avoids the risk of being caught between the specimen and the side or top plate when manually gripping it, thus improving operational safety.

[0033] In this embodiment, the workflow of the rapid marker for the elastic modulus of concrete is as follows:

[0034] Step 1: Place the standard concrete specimen (150×150×300mm prism) to be marked on a stable platform. Hold the marker handle 6 and put the marker on the specimen, ensuring that the inner surfaces of the top plate 1, the first side plate 21 and the second side plate 22 are in close contact with the corresponding surfaces of the specimen.

[0035] Step 2: After confirming a secure fit without any misalignment, use a marking tool (such as a pencil) to precisely draw crosshair lines on the side of the specimen through the first positioning through hole 41 and the second positioning through hole 42. The intersection of the crosshair lines is the required measurement point for the elastic modulus.

[0036] Step 3: After marking, simply lift the marking device. Both side plates are equipped with positioning through holes and a scale, allowing marking to be done simultaneously on both sides of the specimen. The entire process takes only 10-15 seconds, truly achieving "instant marking and immediate removal," simplifying the marking process.

[0037] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "upper" and "lower" and "top" and "bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0039] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A rapid marking instrument for the elastic modulus of concrete, characterized in that: The concrete elastic modulus rapid marking instrument includes a top plate (1), a first side plate (21), and a second side plate (22) opposite to the first side plate (21). The top plate (1), the first side plate (21), and the second side plate (22) are all made of aluminum alloy. The top plate (1), the first side plate (21), and the second side plate (22) together form a U-shaped slot extending along the length direction. The U-shaped slot defines an internal space (3) for accommodating standard concrete specimens. The first side plate (21) is provided with a first positioning through hole (41) and a second positioning through hole (42). The first positioning through hole (41) and the second positioning through hole (42) are distributed at intervals along the length direction of the first side plate (21), and the positions of the first positioning through hole (41) and the second positioning through hole (42) match the measurement gauge length requirements of the concrete elastic modulus test.

2. The rapid concrete modulus marker of claim 1, wherein: The width of the inner side of the top plate (1), the height of the inner side of the first side plate (21), and the height of the inner side of the second side plate (22) are all equal, so that the cross-section of the internal space (3) extending along the length direction is square.

3. A rapid concrete modulus marker as defined in claim 2, wherein: The cross-sectional side length of the internal space (3) is 150mm, and the length extension dimension is 300mm.

4. The rapid concrete modulus marker of claim 1, wherein: The first positioning through hole (41) and the second positioning through hole (42) are both cross-shaped through holes. The intersection of the cross-shaped through holes forms the reference point of the mark. The outline of the cross-shaped through hole is used to guide the marking tool to draw the cross positioning line.

5. The rapid concrete modulus marker of claim 1, wherein: The first side plate (21) is engraved with a first scale (51) and a second scale (52). The first scale (51) extends along the length direction of the first side plate (21), and the zero point of the first scale (51) is located at the end of the first side plate (21). The second scale (52) extends along the width direction of the first side plate (21), and the zero point of the second scale (52) is located at the connection between the first side plate (21) and the top plate (1).

6. A rapid concrete modulus marker as claimed in claim 4 or 5 wherein: The center intersection of the first positioning through hole (41) is located at the intersection of the 75mm scale line of the first scale (51) and the 75mm scale line of the second scale (52). The center intersection of the second positioning through hole (42) is located at the intersection of the 225mm scale line of the first scale (51) and the 75mm scale line of the second scale (52). The center distance between the first positioning through hole (41) and the second positioning through hole (42) is 150mm.

7. A rapid concrete modulus marker as defined in claim 6, wherein: The first side plate (21) and the second side plate (22) have the same structure and are used for synchronous marking on both sides of the specimen.

8. The rapid concrete modulus marker of claim 1, wherein: The concrete elastic modulus rapid marking instrument also includes a handle (6), which is fixedly mounted on the top plate (1).

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