Mold for pouring single-side freeze-thaw concrete test piece
By using high-density polyethylene plates or stainless steel plates and a combined structure of central grooves and edge fixings in concrete specimen molds, the problems of deformation and up-climbing of polytetrafluoroethylene sheets are solved, and the molding quality and testing reliability of the specimen are improved.
Patent Information
- Application Number
- CN202422384716.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In existing concrete specimen molds, the polytetrafluoroethylene sheets are prone to deform during the pouring process, resulting in poor separation effect, affecting the molding quality of the specimen and the reliability of the test results, and climbing up during the vibration process, increasing experimental errors.
A mold for single-sided frozen-thaw concrete specimens is designed, using high-density polyethylene plates or stainless steel plates as partitions, and through a combined structure of central grooves and edge fixings, providing support and fixation, avoiding deformation and up-climbing of partition plates, and ensuring the uniformity and molding quality of concrete specimens.
It effectively avoids deformation and climbing problems of the partition plate, improves the molding quality of concrete specimens and the reliability of test results, and reduces experimental errors.
Smart Images
Figure CN223130964U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of concrete specimen preparation equipment, and particularly relates to a mold for casting single-sided freeze-thaw concrete specimens. Background Art
[0002] With the continuous development of building materials science, the application of concrete is becoming more and more extensive. Especially in engineering tests, the preparation and testing technologies of concrete specimens have gradually become a research hotspot. According to the "Standard for Test Methods of Long-Term Performance and Durability of Concrete" (GB / T50082-2009) in the prior art, during the preparation of concrete specimens, it is required to use a cube mold with standard dimensions and insert a polytetrafluoroethylene sheet in the middle of the mold as a separator to ensure the uniformity and accuracy of the formed specimens. However, this traditional mold design has obvious defects in actual operation.
[0003] The main problem of the prior art is that during the process of casting concrete, the polytetrafluoroethylene sheet is prone to deformation due to its soft texture, resulting in poor separation effect of the specimens and ultimately affecting the reliability of the test results. In addition, when using a vibrating table to vibrate the concrete, the polytetrafluoroethylene sheet obviously climbs upward, resulting in ineffective separation of the lower part of the concrete, which not only reduces the forming quality of the specimens but also increases the error risk of subsequent experiments.
[0004] Although the existing standards provide corresponding concrete specimen preparation processes and requirements, these technologies cannot fully meet the needs of high-precision concrete specimen preparation in practical applications. The forming effect of the specimens is not ideal, further affecting the test results of the long-term performance and durability of concrete. Therefore, there is an urgent need for a new technical solution to solve the deficiencies in the prior art and ensure the stability and reliability of the concrete specimen preparation process. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a mold for casting single-sided freeze-thaw concrete specimens.
[0006] The technical solution of the present utility model for solving the above technical problems is as follows: A mold for casting single-sided freeze-thaw concrete specimens, which includes: a bottom plate and side plates; the side plates are arranged on the upper surface of the bottom plate; the side plates include a first side plate, a second side plate, a third side plate, and a fourth side plate connected in sequence; the first side plate and the second side plate are arranged opposite to each other and form a first side plate group, and the third side plate and the fourth side plate are arranged opposite to each other and form a second side plate group; a central groove is provided on the inner side of one of the first side plate group and the second side plate group; both sides of the partition plate are installed in the central groove; it also includes a partition plate fixing device, and the partition plate fixing device includes a first rib fixing piece and a second rib fixing piece arranged above the side plates. The rib is inserted into the fixing holes of the first rib fixing piece and the second rib fixing piece, and the rib is located above the partition plate and abuts against the top surface of the partition plate.
[0007] For the mold for casting single-sided freeze-thaw concrete specimens as described above in the present utility model, further, the partition plate is an acrylic plate, a high-density polyethylene plate, or a stainless steel plate, and the rib is a triangular rib or a quadrangular rib.
[0008] For the mold for casting single-sided freeze-thaw concrete specimens as described above in the present utility model, further, central grooves are respectively provided in the middle parts of the third side plate and the fourth side plate. The first rib fixing piece is arranged on the top of the first side plate, and the second rib fixing piece is arranged on the top of the second side plate; the first rib fixing piece and the second rib fixing piece are provided with triangular fixing holes, and the rib is a triangular rib.
[0009] For the mold for casting single-sided freeze-thaw concrete specimens as described above in the present utility model, further, it also includes stiffening ribs, and the stiffening ribs are vertically arranged on the outside of any one, two, or more of the first side plate, the second side plate, the third side plate, and the fourth side plate.
[0010] For the mold for casting single-sided freeze-thaw concrete specimens as described above in the present utility model, further, the first side plate, the second side plate, the third side plate, and the fourth side plate all include a side plate body, a left extension plate, and a right extension plate. The left extension plate and the right extension plate are respectively arranged on both sides of the side plate body, and both the left extension plate and the right extension plate are bent outward from the outer side of the side plate body, and the included angle between the left extension plate and the right extension plate and the side plate body is 45 degrees.
[0011] For the mold for casting single-sided freeze-thaw concrete specimens as described above in the present utility model, further, it also includes a top edge, and the top edge is connected above the side plates.
[0012] Since the partition plates on both sides of the utility model are inserted into the central groove, and the inner wall of the side plate corresponding to the central groove provides a certain supporting force for the partition plates, the deformation of the partition plates can be avoided to a certain extent in the vertical direction along the central groove. Due to the arrangement of the partition plate fixing device, the partition plates can be directly pressed from above, applying a downward pressure to the partition plates, so as to overcome and offset the upward movement force of the partition plates generated during the concrete vibration process, solve the problem of the partition plates climbing up during the compaction process, and make the middle part of the fabricated concrete specimen completely separated by the partition plates, improving the forming quality of the specimen. Description of the Drawings
[0013] Through the detailed description in combination with the following drawings, the above and / or other advantages of the utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the utility model, where:
[0014] Figure 1 Schematic diagram of a mold for pouring single-sided freeze-thaw concrete specimens in one embodiment;
[0015] Figure 2 Schematic diagram of the third side plate and the fourth side plate in one embodiment of the utility model;
[0016] Figure 3 Schematic diagram of the partition plate fixing device in one embodiment of the utility model;
[0017] Figure 4 Schematic diagram of the application state of the mold for pouring single-sided freeze-thaw concrete specimens;
[0018] Figure 5 Schematic diagram of the first side plate and the second side plate in one embodiment of the utility model;
[0019] Figure 6 Schematic diagram of the bottom plate in one embodiment of the utility model.
[0020] In the drawings, the list of components represented by each reference numeral is as follows:
[0021] 10, the first side plate; 20, the second side plate; 21, the second side plate body; 22, the right extension plate of the second side plate body; 23, the left extension plate of the second side plate body; 24, the stiffening rib of the second side plate; 30, the third side plate; 40, the fourth side plate; 41, the fourth side plate body; 42, the left extension plate of the fourth side plate body; 43, the right extension plate of the fourth side plate body; 44, the stiffening rib of the fourth side plate; 45, the central groove; 50, the partition plate fixing device; 51, the first rib fixing piece; 52, the second rib fixing piece; 53, the triangular rib; 60, the bottom plate; 61, the air hole; 70, the partition plate; 80, the top edge. Detailed Embodiment
[0022] In the following, embodiments of the mold for casting single-sided freeze-thaw concrete specimens of the present utility model will be described with reference to the accompanying drawings.
[0023] The embodiments described herein are specific specific embodiments of the present utility model for explaining the concept of the present utility model, and are all explanatory and exemplary, and should not be construed as limiting the embodiments of the present utility model and the scope of the present utility model. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of the present application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.
[0024] The drawings in this specification are schematic diagrams to assist in explaining the concept of the present utility model, schematically showing the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of the various components of the embodiments of the present utility model, the drawings are not drawn in the same proportion. The same reference numerals are used to represent the same parts.
[0025] Embodiment 1
[0026] The following will be described in conjunction with Figures 1 to 5 , a mold for casting single-sided freeze-thaw concrete specimens according to an embodiment of the present utility model, which includes:
[0027] A bottom plate 60 and side plates; in conjunction with Figure 1 , Figure 4 and Figure 6 As shown, the bottom plate is a rectangular structure. For example, the bottom plate is a square structure, and the four corners of the bottom plate are rounded. Figure 6 This is the bottom plate structure of a preferred embodiment. Air holes 61 are provided on the bottom plate 60. During the demolding process of the concrete specimen, the air duct is connected to the position of the air hole, and the gas pressure in the air duct is used to smoothly demold the specimen in the mold. In a specific embodiment, the materials of the bottom plate and the side plates are preferably plastic materials (such as PP material), which can avoid corrosion problems during the preparation of concrete specimens.
[0028] The side plates include a first side plate 10, a second side plate 20, a third side plate 30, and a fourth side plate 40 connected in sequence; the first side plate 10 and the second side plate 20 are arranged opposite to each other and form a first side plate 10 group, and the third side plate 30 and the fourth side plate 40 are arranged opposite to each other and form a second side plate 20 group; the side plates are arranged on the upper surface of the bottom plate 60. For example, the side plates and the bottom plate are fixedly connected by bonding or other means, so as to achieve the sealing of the middle space formed between the bottom plate and the side plates and avoid leakage at the connection position between the side plates and the bottom plate; in conjunction with Figure 1 and Figure 4As shown, the internal cavity formed by the side plates and the bottom plate is a cuboid or cube structure for concrete pouring.
[0029] A central groove 45 is provided on the inner side of one of the 10 groups of first side plates and the 20 groups of second side plates; both sides of the partition plate 70 are installed in the central groove 45; by providing a central groove on the inner side of one group of side plates, the partition plate can be installed and fixed by using this groove, so that the horizontal position of the partition plate can be defined by the groove, avoiding the displacement of the partition plate in the horizontal direction. In a preferred embodiment, the width of the groove is 6 mm, the depth is 3 mm, and the height is equal to the height of the side plate. Correspondingly, the thickness dimension of the partition plate is set to 6 mm, and the fit between the partition plate and the groove is a clearance fit. In a more preferred embodiment, the fit between the partition plate and the groove is an interference fit. Through the interference fit between the partition plate and the groove, not only can the displacement of the partition plate in the horizontal direction be avoided, but also the position of the partition plate in the vertical direction can be restricted, avoiding the problem that the lower part of the concrete specimen cannot be completely separated due to the upward climbing of the partition plate during the vibration compaction process, and improving the pouring success rate of the test concrete block. In a preferred embodiment, the partition plate is a high-density polyethylene plate, an acrylic plate (PMMA, made of polymethyl methacrylate) or a stainless steel plate. By using the partition plate of the above materials, the problem that the polytetrafluoroethylene sheet is prone to deformation during the concrete pouring process due to its soft texture, resulting in poor separation effect of the specimen and ultimately affecting the quality of the specimen is avoided.
[0030] It further includes a partition plate fixing device 50. The partition plate fixing device 50 includes a first rib fixing member 51 and a second rib fixing member 52 provided above the side plate. The rib is inserted into the fixing holes of the first rib fixing member 51 and the second rib fixing member 52, and the rib is located above the partition plate and abuts against the top surface of the partition plate. In a first preferred embodiment, the rib is a triangular rib 53 or a quadrangular rib. Using a triangular or quadrangular structure can avoid the problem that the rib further disengages from the fixing member due to the rotation of the rib.
[0031] The process of pouring a concrete specimen using the mold for pouring a single-sided freeze-thaw concrete specimen according to the above embodiments of the present invention is as follows:
[0032] Step 1, as Figure 1 , remove the triangular rib, and apply a release agent to the side plates and the bottom plate; Step 2, after inserting the partition plate into the middle groove, insert the triangular rib into the corresponding fixing hole; Step 3, after the mold is assembled, start pouring concrete into the mold, and then place the mold on the laboratory vibrating table for compaction; Step 4, after compaction, level the upper surface of the test block and place the mold horizontally, and remove the triangular rib to prevent it from sticking to the concrete; Step 5, after 24 hours, demold and enter the curing process, that is, complete the concrete pouring work; Step 6, place the whole test block in water for curing until the age of 7 days, and remove the partition plate to complete the separation of the specimen.
[0033] Since both sides of the partition board of the present utility model are inserted into the central groove, and the inner wall of the side board corresponding to the central groove provides a certain supporting force for the partition board, the partition board can be prevented from deforming to a certain extent in the vertical direction along the central groove. Due to the arrangement of the partition board fixing device, it can directly press the partition board from above, applying a downward pressure on the partition board, so as to overcome and offset the upward movement force of the partition board generated during the concrete vibration process, solve the problem of the partition board climbing up during the compaction process, and make the middle part of the made concrete specimen completely separated by the partition board, improving the forming quality of the specimen.
[0034] Combined with Figure 1 and Figure 2 As shown, central grooves 45 are respectively arranged in the middle parts of the third side board 30 and the fourth side board 40. The first rib fixing member 51 is arranged at the top of the first side board 10, and the second rib fixing member 52 is arranged at the top of the second side board 20. Triangular fixing holes are arranged on the first rib fixing member 51 and the second rib fixing member 52, and the rib is a triangular rib 53. In this embodiment, the number of ribs is two, and they are arranged in parallel at intervals. Correspondingly, there are two groups of the first rib fixing member 51 and the second rib fixing member 52, which are arranged at intervals. By arranging two groups of ribs for pressing the partition board downward, the upward movement of one side of the partition board during the concrete vibration process can be avoided.
[0035] In a preferred embodiment of the mold for casting single-sided freeze-thaw concrete specimens, it further includes stiffening ribs, and the stiffening ribs are vertically arranged on the outside of any one, two or more of the first side board 10, the second side board 20, the third side board 30 and the fourth side board 40. In a preferred embodiment, vertical stiffening ribs are arranged on the outside of the first side board 10, the second side board 20, the third side board 30 and the fourth side board 40, and the overall strength of the mold is improved by using the stiffening ribs to meet the preparation requirements of the concrete specimens. Since the side board provided with the central groove will have stress concentration at the central groove part, stiffening ribs are arranged on the corresponding side board to ensure that the strength of the concrete mold meets the use requirements.
[0036] In a further preferred embodiment of the mold for casting single-sided freeze-thaw concrete specimens, the first side board 10, the second side board 20, the third side board 30 and the fourth side board 40 each include a side board body, a left extension board and a right extension board. The left extension board and the right extension board are respectively arranged on both sides of the side board body. The left extension board and the right extension board are bent outward from the outside of the side board body, and the included angle between the left extension board and the right extension board and the side board body is 45 degrees. Combined with Figure 2As shown, the structures of the third side plate and the fourth side plate are the same. Taking the fourth side plate as an example, the specific structure will be described. The fourth side plate 40 includes a fourth side plate body 41, a left extension plate 42 of the fourth side plate body arranged on both sides thereof, and a right extension plate 43 of the fourth side plate body. A vertical stiffening rib 44 of the fourth side plate is arranged on the outer side of the fourth side plate, and a central groove 45 is arranged on the inner side of the fourth side plate. Combined with Figure 4 As shown, the structures of the first side plate and the second side plate are the same. Taking the second side plate as an example, the specific structure will be described. The second side plate 20 includes a second side plate body 21, a right extension plate 22 of the second side plate body connected to both sides thereof, and a left extension plate 23 of the second side plate body. A vertical stiffening rib 24 of the second side plate is arranged on the outer side of the second side plate. First, by providing the extension plates, during the splicing process of the side plates, it is easier to splice two adjacent side plates into a mutually perpendicular structure, improving the splicing speed. Second, the extension plates of adjacent side plates are tightly connected, increasing the sealing area between adjacent side plates, thereby avoiding leakage at the connection position of adjacent side plates.
[0037] In a preferred embodiment, the mold for casting a single-sided freeze-thaw concrete specimen further includes a top edge 80, and the top edge 80 is connected above the side plates. The top edge can also be referred to as the top plate. The above-mentioned top edge is a rectangular structure corresponding to the bottom plate, and a hole having the same horizontal cross-section as the concrete specimen is arranged on the inner side of the top edge. By providing the top edge, the tops of the mutually connected side plates can be connected, further improving the overall strength of the side plates.
[0038] The disclosed technical features are not limited to the combinations with other disclosed features. Those skilled in the art can also make other combinations between the technical features according to the purpose of the utility model, subject to achieving the purpose of the utility model.
Claims
1. A mold for casting single-sided freeze-thaw concrete specimens, characterized in that, Comprising: A bottom plate (60) and side plates; the side plates are disposed on the upper surface of the bottom plate (60); the side plates include a first side plate (10), a second side plate (20), a third side plate (30), and a fourth side plate (40) connected in sequence; the first side plate (10) and the second side plate (20) are oppositely disposed and form a first side plate (10) group, the third side plate (30) and the fourth side plate (40) are oppositely disposed and form a second side plate (20) group; a central groove (45) is provided inside one of the first side plate (10) group and the second side plate (20) group; both sides of a partition plate (70) are mounted in the central groove (45); further comprising a partition plate fixing device (50), the partition plate fixing device (50) includes a first rib fixing member (51) and a second rib fixing member (52) disposed above the side plates, a rib is inserted into the fixing holes of the first rib fixing member (51) and the second rib fixing member (52), and the rib is located above the partition plate and abuts against the top surface of the partition plate.
2. The mold for casting single-sided freeze-thaw concrete specimens according to claim 1, characterized in that, The partition plate is a high-density polyethylene plate, an acrylic plate, or a stainless steel plate, and the rib is a triangular rib (53) or a square rib.
3. The mold for casting single-sided freeze-thaw concrete specimens according to claim 1, characterized in that, Central grooves (45) are respectively provided in the middle parts of the third side plate (30) and the fourth side plate (40), the first rib fixing member (51) is disposed at the top of the first side plate (10), and the second rib fixing member (52) is disposed at the top of the second side plate (20); the first rib fixing member (51) and the second rib fixing member (52) are provided with triangular fixing holes, and the rib is a triangular rib (53).
4. The mold for casting single-sided freeze-thaw concrete specimens according to claim 3, characterized in that, Further comprising stiffening ribs, the stiffening ribs are vertically disposed on the outside of any one, two, or more of the first side plate (10), the second side plate (20), the third side plate (30), and the fourth side plate (40).
5. The mold for casting single-sided freeze-thaw concrete specimens according to claim 3 or 4, characterized in that The first side plate (10), the second side plate (20), the third side plate (30), and the fourth side plate (40) each include a side plate body, a left extension plate, and a right extension plate, the left extension plate and the right extension plate are respectively disposed on both sides of the side plate body, the left extension plate and the right extension plate are bent outward from the outer side surface of the side plate body, and the included angle between the left extension plate and the right extension plate and the side plate body is 45 degrees.
6. The mold for casting single-sided freeze-thaw concrete specimens according to claim 1, characterized in that, Further comprising a top surface edge (80), the top surface edge (80) is connected above the side plates.