Cylindrical test piece mold for side wall concrete extrusion test

Abstract

The utility model discloses a cylindrical test piece mold for a side wall concrete extrusion test, and belongs to the field of concrete face rockfill dam construction. According to the cylindrical test piece mold for the side wall concrete extrusion test, a mixing material is filled into the cylindrical sleeve, the steel pressing plate is placed above the mixing material, and the force transmission column is driven by the driving mechanism, so that the steel pressing plate is pushed to move downwards, the effect of compacting the mixing material is realized, and the manufacturing of a test piece is completed; due to the fact that the cylindrical sleeve is composed of the two semi-cylindrical shells which are detachably connected, after a test piece is compacted, demolding can be completed only by disassembling the two semi-cylindrical shells; in the demolding process, the test piece is not subjected to other destructive force any more, the integrity of the test piece is guaranteed, and the qualification rate of the test piece is increased; the problem that the percent of pass of a test piece is low due to the fact that the test piece is not easy to demould in an existing cylindrical test piece mould is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to concrete face rockfill dam construction technical field, concretely relates to a cylindrical test piece mould for extrusion side wall concrete test. BACKGROUND

[0002] In the construction of the dam project, when the next layer of the dam is filled, a concrete side wall is filled at the edge of the dam water surface to protect the dam water surface slope. In order to ensure the quality of construction, the cylindrical compressive strength and static compressive elastic modulus of the extrusion side wall concrete are determined by the cylindrical compressive strength and static compressive elastic modulus test during construction, so as to evaluate the quality of the extrusion side wall concrete.

[0003] When the test is carried out, the cylindrical concrete test piece needs to be made first. The existing test piece mould includes an integral cylindrical sleeve, a steel pressing plate and a pressing machine. The mixed material is loaded into the cylindrical sleeve in batches, the steel pressing plate is covered above the mixed material, and the test piece is extruded by moving down the pressing machine. Since the mixed material needs to be added in batches, the steel pressing plate needs to be taken out many times. However, since the steel pressing plate does not have a convenient handle, the steel pressing plate is not convenient to take out, which consumes time. At the same time, the strength of the extrusion side wall concrete is small, generally 3MPa~5MPa, so that the test piece is damaged, which affects the accuracy of the test.

[0004] In summary, the existing cylindrical test piece mould has the problem that the test piece is not easy to demould, which leads to low test piece pass rate. Utility model content

[0005] The utility model provides a cylindrical test piece mould for extrusion side wall concrete test, which is novel and reasonable in design, simple in structure, strong in practicability and convenient to use and promote.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A cylindrical test piece mould for extrusion side wall concrete test, comprising a cylindrical sleeve, a base, a fastening bolt, a steel pressing plate, a force transmission column and a driving mechanism for driving the force transmission column to move.

[0008] The connecting lug is provided with a first connecting hole, and the base is provided with a second connecting hole corresponding to the contact position of the lug, and the fastening bolt passes through the first connecting hole and the second connecting hole, so that the cylindrical sleeve is fixed above the base.

[0009] The steel pressing plate is used for being placed above the mixed material in the cylindrical sleeve;

[0010] The force transmission column is used for pushing the steel pressing plate to move downward to realize the extrusion of the steel pressing plate to the mixed material.

[0011] The cylindrical sleeve is composed of two half-cylindrical shells which are detachably connected through connecting plates and connecting nuts at both circumferential ends.

[0012] Further, a height increasing sleeve with the same inner diameter as the cylindrical sleeve is further included, the height increasing sleeve is provided with a stepped surface at the lower end for embedding the upper end part of the cylindrical sleeve, and the width of the stepped surface is equal to the wall thickness of the cylindrical sleeve.

[0013] Further, at the contact part of the two half-cylindrical shells, one is provided with a convex rib, and the other is provided with a limiting groove corresponding to the convex rib.

[0014] Further, a first circular groove concentric with the base is formed on the base for assembling the cylindrical sleeve.

[0015] Further, handles are arranged on both sides of the base.

[0016] Further, the force transmission column adopts a hollow cylindrical structure.

[0017] Further, a handle is arranged on the steel pressing plate corresponding to the hollow part of the hollow cylindrical structure.

[0018] Further, a second circular groove concentric with the steel pressing plate is formed on the steel pressing plate for limiting the position of the force transmission column.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The cylindrical test piece mold for extrusion side wall concrete test of the utility model realizes the effect of compacting mixed material by driving the force transmission column through the driving mechanism to push the steel pressing plate downward to move, and completes the production of the test piece; since the cylindrical sleeve is composed of two half-cylindrical shells which are detachably connected, after the test piece is compacted, the two half-cylindrical shells are only needed to be disassembled to complete demolding; the test piece is not subjected to other destructive forces during demolding, the integrity of the test piece is guaranteed, and the qualified rate of the test piece is improved; the problem of low qualified rate of the test piece caused by the fact that the test piece is not easy to demold in the existing cylindrical test piece mold is solved.

[0021] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. DRAWINGS

[0022] Figure 1The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0023] Figure 2 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0024] Figure 3 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0025] Figure 4 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0026] Figure 5 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0027] Figure 6 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0028] Figure 7 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0029] Figure 8 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0030] Figure 9 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0031] Figure 10 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0032] Figure 11 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0033] Figure 12 The utility model discloses a cylinder test piece mould for extruding side wall concrete test has the cross section structure schematic drawing of height increasing sleeve of the cross section structure schematic drawing of height increasing sleeve of cylinder test piece mould for extruding side wall concrete test,

[0034] Mark explanation:

[0035] 1, cylinder sleeve;11, connecting lug;12, first connecting hole;13, half cylinder shell,

[0036] 14. Connecting plate; 15. Connecting nut; 16. Protruding ridge; 17. Limiting groove;

[0037] 2. Base; 21. Second connecting hole; 22. First circular groove; 23. Handle;

[0038] 3. Tighten the bolts;

[0039] 4. Steel pressure plate; 41. Handle; 42. Second circular groove;

[0040] 5. Force transmission column;

[0041] 6. Heightening sleeve; 61. Stepped surface. Detailed Implementation

[0042] Example of a cylindrical specimen mold for extrusion-resistant sidewall concrete testing:

[0043] like Figure 1 , Figure 2 As shown, the cylindrical specimen mold for the test of extruded sidewall concrete includes a cylindrical sleeve 1, a base 2, fastening bolts 3, a steel pressure plate 4, a force transmission column 5, and a drive mechanism for driving the force transmission column 5 to move.

[0044] like Figures 8-12 As shown, specifically, connecting lugs 11 are symmetrically arranged on the lower outer side of the cylindrical sleeve 1. A first connecting hole 12 is provided on the connecting lug 11, and a second connecting hole 21 is correspondingly provided at the contact point between the base 2 and the lug. The fastening bolts 3 pass through the first connecting hole 12 and the second connecting hole 21, thus fixing the cylindrical sleeve 1 above the base 2. To ensure that the mixture is evenly compressed, a steel pressure plate 4 is placed above the mixture inside the cylindrical sleeve 1. To facilitate the operation of the steel pressure plate 4, its diameter is slightly smaller than the inner diameter of the cylindrical sleeve 1.

[0045] To achieve compaction of the mixture, the aforementioned force transmission column 5 is used to push the steel pressure plate 4 downward, thereby squeezing the mixture. To address the problem of low specimen strength, which easily leads to chipping and corner breakage during demolding and affects test results, the cylindrical sleeve 1 is composed of two semi-cylindrical shells 13. Both ends of the two semi-cylindrical shells 13 are detachably connected along the circumferential direction by connecting plates 14 and connecting nuts 15.

[0046] To accommodate different height requirements of the specimens and facilitate the addition of mixing materials, an elevating sleeve 6 with the same inner diameter as the cylindrical sleeve 1 is also included. The lower end of the elevating sleeve 6 is provided with a stepped surface 61 for embedding into the upper part of the cylindrical sleeve 1; the width of the stepped surface 61 is equal to the wall thickness of the cylindrical sleeve 1. Generally, the height of the specimen is 300 mm and the bottom diameter is 150 mm.

[0047] In order to avoid displacement of the joint of the two half-cylinder shells 13, affecting the shape of the test piece, the contact part of the two half-cylinder shells 13 is provided with a convex rib 16 on one side and a limiting groove 17 corresponding to the convex rib 16 on the other side, so as to increase the compression resistance of the joint, avoid displacement of the joint, and improve the yield of the test piece.

[0048] As shown in Figures 3-5 , in order to avoid displacement between the base 2 and the cylindrical sleeve 1, a first circular groove 22 concentric with the base 2 is formed on the base 2 for assembling the cylindrical sleeve 1, so as to limit the relative position of the cylindrical sleeve 1 and the base 2.

[0049] In order to facilitate the movement of the test piece, handles 23 are arranged on both sides of the base 2. The force transmission column 5 adopts a hollow cylindrical structure.

[0050] In order to facilitate the removal of the steel pressing plate 4, a handle 41 is arranged on the steel pressing plate 4 corresponding to the hollow part of the hollow cylindrical structure, so as to shorten the production time of the test piece.

[0051] As shown in Figure 6 , Figure 7 , in order to ensure that the force transmission column 5 can accurately contact the steel pressing plate 4, a second circular groove 42 concentric with the steel pressing plate 4 is formed on the steel pressing plate 4 for limiting the position of the force transmission column 5, so as to ensure the effect of the force transmission column 5 pushing the steel pressing plate 4.

[0052] The process of making the test piece by the cylindrical test piece mold is as follows:

[0053] Two half-cylinder shells 13 are assembled together by connecting nuts 15, placed in the first circular groove 22 of the base 2, and the base 2 and the cylindrical sleeve 1 are fixed by fastening bolts 3; the mixed material is added into the cylindrical sleeve 1 twice, after the first time of adding the mixed material, the surface of the mixed material in the cylindrical sleeve 1 is leveled, the steel pressing plate 4 is placed in the cylindrical sleeve 1, the steel pressing plate 4 is placed by the handle 41 of the steel pressing plate 4, the whole cylindrical sleeve 1 with the mixed material and the base 2 are moved to the bottom of the transmission column by the handle 23 of the base 2, the longer transmission column is placed, the driving mechanism is loaded and pressed, the whole cylindrical sleeve 1 with the mixed material and the base 2 are moved out by the handle 23 of the base 2, at this time, the steel pressing plate 4 is located in the middle of the cylindrical sleeve 1, the steel pressing plate 4 is taken out by the handle 41 of the steel pressing plate 4, the steel pressing plate 4 is placed by the handle 41 of the steel pressing plate 4, the whole cylindrical sleeve 1 with the mixed material and the base 2 are moved to the bottom of the transmission column again by the handle 23 of the base 2, the shorter transmission column is placed, the pressing machine is loaded and pressed, and then the heightening sleeve 6 is removed. The same steps are repeated to prepare six test pieces. After the test pieces are moved into the molding room and stand for 24 hours, demolding is prepared. During demolding, the fastening bolts 3 used for fixing the base 2 and the steel test mold are removed first, then the connecting bolts used for connecting the two half-cylinder shells 13 are removed, the two half-cylinder shells 13 are gently taken out to complete demolding, and complete test pieces are obtained. The demolding method is simple and fast, and the situation that the test pieces are missing or the corners are dropped during demolding is avoided.

[0054] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any simple modification, change and equivalent structural change of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A mold for testing a cylindrical specimen of extruded wall concrete, characterized by: It comprises a cylindrical sleeve (1), a base (2), a fastening bolt (3), a steel pressing plate (4), a force transmission column (5) and a driving mechanism for driving the force transmission column (5) to move. The cylindrical sleeve (1) is provided with a connecting lug (11) symmetrically on the left and right below the outer side, a first connecting hole (12) is formed on the connecting lug (11), a second connecting hole (21) is formed on the base (2) corresponding to the contact position of the lug, the fastening bolt (3) passes through the first connecting hole (12) and the second connecting hole (21), so that the cylindrical sleeve (1) is fixed above the base (2). The steel pressing plate (4) is used for placing above the mixed material in the cylindrical sleeve (1). The force transmission column (5) is used for pushing the steel pressing plate (4) to move downward, so as to realize the extrusion of the steel pressing plate (4) on the mixed material. The cylindrical sleeve (1) is composed of two half-cylinder shells (13), and the two half-cylinder shells (13) are detachably connected through the connecting plate (14) and the connecting nut (15) at the circumferential two ends.

2. A mold for extruded side wall concrete test cylinders according to claim 1, characterized in that: It also comprises a heightening sleeve (6) with the same inner diameter as the cylindrical sleeve (1), the lower end of the heightening sleeve (6) is provided with a stepped surface (61) for embedding the upper end of the cylindrical sleeve (1), and the width of the stepped surface (61) is equal to the wall thickness of the cylindrical sleeve (1).

3. A mold for extruded sidewall concrete test cylinders according to claim 1, characterized in that: The contact position of the two half-cylinder shells (13) is provided with a convex rib (16) on one side and a limiting groove (17) corresponding to the convex rib (16) on the other side.

4. A mold for extruded sidewall concrete test cylinders according to claim 1, characterized in that: A first circular groove (22) concentric with the base (2) is formed on the base (2) for assembling the cylindrical sleeve (1).

5. A mold for extruded side wall concrete test cylinders according to claim 1, characterized in that: The base (2) is provided with a handle (23) on both sides.

6. A mold for extruded side wall concrete test cylinders according to claim 1, characterized in that: The force transmission column (5) adopts a hollow cylindrical structure.

7. A test cylinder mold for extruded wall concrete according to claim 6, characterized in that: A handle (41) is arranged on the steel pressing plate (4) corresponding to the hollow position of the hollow cylindrical structure.

8. A mold for casting a cylindrical test specimen of extruded sidewall concrete according to claim 1, characterized in that: A second circular groove (42) concentric with the steel pressing plate (4) is formed on the steel pressing plate (4) for limiting the position of the force transmission column (5).

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