JP5947096B2 - Test piece molding form, test piece molding form opening method - Google Patents

Description

  The present invention relates to a test piece molding form used when making a test piece for measuring the compressive strength of a cement-based material such as concrete, mortar, soil cement, cement paste and the like, and a method for opening the molding form. .

  When using a cement-based material, in order to confirm the solidification strength and determine whether the blending is appropriate or not, a test piece is molded with the blending and the compression strength and the like are measured. In this case, as the molding mold used for molding the test piece, a resin molding mold that is light and easy to handle has been used in place of the cast iron molding mold. In the case of using a resin mold, various measures have been conventionally taken to extract the test piece solidified from the mold and the shape retention strength to the extent that the test piece is molded according to the dimensions (Patent Literature). 1-3).

  For example, by providing a cut surface portion or a cut cylindrical wall portion divided by two grooves from the opening edge, the molding frame is cut (Patent Documents 1 and 2). An axial rib was formed on the surface.

  Moreover, the weak part was formed in the axial direction, and the mold was cut (Patent Document 3). In this case, support wall parts were provided on both sides of the weak part.

  Also, in these molds, the height of the mold is not explicitly described, but the test piece is formed to be almost the same as the height of the test piece to be molded, as in the conventional cast iron mold. It is well known to those skilled in the art that capping and end polishing are performed to treat the upper surface of the substrate flatly.

JP 7-68524 A JP-A-9-145570 JP 2005-345169 A

  The conventional mold is not preferable because it requires a capping operation and an end surface polishing operation after the cement material as a sample is solidified, and the operation becomes complicated.

  In addition, since ribs were formed along the grooves and fragile portions to reinforce, large protrusions were formed from the surface of the cylindrical base material. There was a problem of cutting at the vulnerable part.

  Further, when the sample in the mold is solidified, there is a possibility that the height of the test piece is reduced by breathing, and there is a possibility that a non-uniform portion or a low strength portion is formed in the upper portion of the test piece. In order to cope with this, the portion has to be cut, and the height of the test piece may become a predetermined dimension or less.

Therefore, in this invention, using a tubular support having a higher plate than the height H ₀ of the test piece, and the display reference height position of the H ₀ to the tubular support, a reference from at least the bottom plate further tubular support The above-described problem has been solved by providing means for cutting in a substantially vertical direction up to the height.

That is, the invention of the forming mold is a mold for manufacturing a test piece of cementitious material having a height of H ₀ , and is a test piece forming mold having the following configuration.
(1) A bottom plate is formed at the lower end portion of the cylindrical side plate, opened upward, and a height H ₁ (H ₁ > H ₀ ) from the bottom plate inner surface to the upper edge is used as the cylindrical base.
(2) If necessary, place an end face forming plate on the inner surface of the bottom plate.
(3) The position of the height H ₀ from the inner surface of the bottom plate of the cylindrical base or the end face forming plate is displayed on the cylindrical base as a reference height display.
(4) On the side plate of the cylindrical base body, a substantially vertical cutting means is formed at least from the bottom plate to the reference height.
(5) A cutting start piece is connected to the cuttable means at an arbitrary position on the outer surface or side plate of the bottom plate of the cylindrical base.
(6) In the case where the cut-off starting piece forms a protrusion that is integrally connected to the outer surface of the cylindrical base body or connected to the outer surface of the cylindrical base body and that is not connected to the cuttable means. It was formed in a position and shape that does not protrude outwardly from the “projection”.

Further, an invention other molding frame, a mold for manufacturing a test piece of cementitious material in the height H _0, which is a test piece molding frame, characterized in that configured as follows.
(1) A bottom plate is formed at the lower end portion of the cylindrical side plate, and the cylindrical base plate has a height H ₁ (H ₁ > H ₀ ) that opens upward and extends from the bottom plate inner surface to the upper edge.
(2) If necessary, place an end face forming plate on the inner surface of the bottom plate.
(3) The position of the height H ₀ from the inner surface of the bottom plate of the cylindrical base or the end face forming plate is displayed on the cylindrical base as a reference height display.
The cylindrical base has a lower cylindrical base piece on the bottom plate side from the reference height display, and an upper cylindrical base piece on the upper end side from the reference height display, and the cylindrical base body has an upper cylindrical base piece and a lower cylindrical piece. A cylindrical base piece is connected, or the cylindrical base is configured to be separable into an upper cylindrical base piece and a lower cylindrical base piece by the reference height display.
(4) On the side plate of the cylindrical base body, a substantially vertical cutout means is formed at least from the bottom plate to the reference height.
(5) A cutting start piece is connected to the cuttable means at an arbitrary position on the outer surface or side plate of the bottom plate of the lower cylindrical base piece.
(6) In the case where the cut-off starting piece forms a protrusion that is integrally connected to the outer surface of the cylindrical base body or connected to the outer surface of the cylindrical base body and that is not connected to the cuttable means. It was formed in a position and shape that does not protrude outwardly from the “projection”.

Further, in the invention of each molding mold, the test piece molding mold is configured as follows.
(1) The cleavable means is a cleavable piece, and the cleavable piece is constituted by a portion surrounded by the two cleavable lines in parallel with two cleavable lines forming a thin portion.
(2) On the side plate of the cylindrical substrate, at least two of the cuttable pieces were formed in a symmetric position.
(3) The cuttable wire is extended to the bottom plate to form a cuttable piece on the bottom plate, and a cut start piece is formed on the outer surface side of the bottom plate continuously to the cuttable piece of the bottom plate.
(4) An end face forming plate having substantially the same cross-sectional shape as the test piece was placed inside the bottom surface of the cylindrical base.
In the invention of the molding mold, the test piece molding mold is configured as follows.
(1) An opening was formed in the center of the bottom plate, a bottom plate cuttable piece was formed on the remaining peripheral edge of the bottom plate, and a cut start piece was continuously provided on the cuttable piece.

Further, in the invention of each molding mold, the test piece molding mold is configured as follows.
(1) On the outer surface of the side plate of the cylindrical base, a plurality of protective protrusions are formed on the outer periphery of the cylindrical base so as to correspond to the reference height display.
(2) Of at least one set of the protective protrusions, a tangent line connecting the outer edges of the protective protrusions is formed between the protective protrusions on the outer surface of the side plate of the cylindrical base body. Touch.

Further, in the invention of each molding mold, the test piece molding mold is configured as follows.
(1) An operation projecting plate is integrally connected to the outer surface of the side plate or the bottom plate of the cylindrical base.
(2) The operation projecting plate is connected to a “position not connected to the cutable means” or a “position including the cuttable means”.

The invention of the unsealing method is a method for unsealing a test piece molding form, characterized in that a form for forming a test piece filled with a cementitious material having a height H ₀ is unsealed as follows.
(1) A cylindrical base having an upward opening and a height H ₁ (H ₁ > H ₀ ) from the inner surface of the bottom plate to the upper edge.
(2) An end face forming plate is installed on the inner surface of the bottom plate of the cylindrical substrate, and in this state, the cementitious material is filled to a height of at least a height H ₀ in the cylindrical substrate, Solidify the cementitious material.
(3) After the cementitious material is solidified, the solidified cement material and the side plate of the cylindrical substrate are cut at a height H ₀ from the upper surface of the end face forming plate.
(4) A cuttable piece surrounded by two cuttable lines is exposed on the side plate, and “directly to the cuttable piece of the side plate” or “a cuttable piece of the bottom plate continuous with the cuttable piece of the side plate” `` Through '', a cutting start piece is provided on the outer surface side of the bottom plate, and after (3) or before (3), the cylindrical substrate containing the solidified cementitious material is turned upside down to start the cutting The piece is manipulated to remove all or part of the cuttable piece, and all or part of the cuttable piece is separated from the cylindrical base and opened.
(5) The solidified cementitious material is taken out from the cylindrical substrate and used as the test piece.

  The “reference height display” in the above may be arbitrarily configured such as displaying as a pattern on a plane or displaying a three-dimensional object protruding or recessed. In addition, the “reference height display” is usually formed on the outer surface of the cylindrical base body, but it is only necessary to indicate the position at which the cement-based material (later test piece) solidified with a circular saw or the like is cut. “Indication” is also possible on the inner surface of the cylindrical substrate.

  The above-mentioned cementitious materials are hydraulic materials such as cement paste, soil cement, mortar, concrete, etc., and are all materials that can be solidified in a mold to form a test piece such as a compression test. Applicable.

In the present invention, since the reference height is displayed for the position of H ₀ using a cylindrical substrate having a side plate that is higher than the height H ₀ of the test piece, at least the injection amount of the cementitious material is not taken into account. It is sufficient to inject more than the reference height. Accordingly, the cementing material can be injected efficiently as soon as possible before the cementing material undergoes a solidification reaction.
In addition, after the cementitious material is solidified, the solidified cementitious material is cut together with the side plate at the reference height display position to obtain a test piece having an accurate height. Furthermore, since the cut surface can be formed flat, it is possible to form a test piece that can obtain a more accurate test result without requiring a conventional capping operation.
Furthermore, when the sample in the mold is solidified, the height of the test piece is reduced even if the height of the test piece is reduced due to breathing, or even if a non-uniform part or low-strength part is formed on the top of the test piece. There is an effect that can be prevented from becoming below a predetermined dimension.

FIG. 1 is a perspective view of a mold according to an embodiment of the present invention, where (a) is a view from above before separation, (b) is a view from below before separation, and (c) is an upper view after separation. (D) is a diagram viewed from below after separation. FIG. 2 is a form of the embodiment of the present invention, in which (a) is a front view, (b) is a right side view, (c) is a bottom view, and (d) is a plan view. 3A is a cross-sectional view taken along the line AA in FIG. 2D, and FIG. 3B is an enlarged view of a portion D in FIG. FIG. 4A is a front view of a part broken along the line BB in FIG. 2B, and FIG. 4B is an enlarged view of a portion E in FIG. FIG. 5A is a cross-sectional view taken along the line CC in FIG. 2A, and FIG. 5A is an enlarged view of a portion F in FIG. FIG. 6A is a bottom view, and FIG. 6B is an enlarged view of a portion G in FIG. FIG. 7A is an enlarged view around the cutting start piece in the bottom view, and FIG. 7B is a sectional view broken along the line JJ in FIG. FIGS. 8A to 8D are perspective views in the middle of cutting the cuttable piece. 9A to 9I are schematic longitudinal sectional views for explaining the method of the embodiment. 10A to 10E are schematic longitudinal sectional views for explaining another method of the embodiment. FIGS. 11A to 11D are perspective views in the middle of cutting a cuttable piece in another embodiment. FIGS. 12A and 12B are perspective views of a mold according to another embodiment of the present invention, in which FIG. 12A is a view as seen from below before separation, and FIG. 12B is a view as seen from above before separation. FIG. 13 is a mold of another embodiment of the present invention, in which (a) is a front view, (b) is a bottom view, and (c) is a plan view.

  Embodiments of the present invention will be described with reference to the drawings.

1. Test piece mold 50

(1) The test piece 1 molded with this mold has a cylindrical shape with an outer diameter D ₀ and a height H ₀ (FIG. 9 (i)). Further, the end face forming plate 40 made of metal or resin used for the mold 50 is a circle having the same outer diameter D ₀ as the outer diameter of the test piece, and has a thickness t ₀ (FIG. 3). The end face forming plate 40 is placed on a bottom plate 16 of a cylindrical base 10 to be described later, and has a rigidity that does not bend as a whole in a state where concrete or the like is poured, and a flat end face is provided on the test piece after solidification. As long as it can be formed, the material is arbitrary, and it may be made of water-resistant wood or paper.
Standard test piece 1,
Outer diameter D ₀ = 5 cm, 10 cm
Height H ₀ = 10 cm, 20 cm
However, it is arbitrarily set with the test piece 1 to be used.

(2) have the same inner diameter as the outer shape D ₀ of the test piece 1, the side plate 12 of the cylindrical opening upward to form a bottom plate 16, forming the tubular support 10. From the lower end 14a of the tubular body 19 to the lower surface 17a of the bottom plate 16 to provide a gap distance _{H 2} (FIG. 3 (b), the Figure 4 (b)).
The bottom plate 16 has a circular opening 18 at the center, and has a donut shape (remaining piece. After opening, the bottom plate 16 is divided into two C-shapes). Reinforcing ribs 19 are formed on the inner peripheral edge of the steel plate downward. The lower edge 19a of the reinforcing ribs 19 is located above the lower edge 14a of the side plate 12 of the tubular body 10, the distance _{H 2} is within the gap (Figure 4 (b)).

(3) Four projecting pieces 21 and 21 are projected horizontally on the outer surface of the upper end portion of the side plate 12 at equal intervals along the outer periphery (that is, the adjacent projecting pieces 21 and 21 form an angle of 90 degrees). To do. The projecting piece 21 is shaped like a right isosceles triangle with a rounded apex angle 22, and the oblique sides 23, 23 of the adjacent projecting pieces 21, 21 are continuous on a straight line 43, and the straight line is the adjacent projecting piece 21. , 21 so as to be in contact with the outer surface 13 of the side plate 14 (FIG. 2D). Accordingly, in the plan view, the four projecting pieces 21 and 21 have a square (rhombus) shape whose apexes (rounded) 22 and 22 are the apexes, and the side plates 12 that are circular in plan view are formed on the sides 23 and 23 of the square. The outer surface 13 is inscribed in the shape (FIGS. 2C and 2D).
The installation position of the projecting piece 21 is a distance (height) H ₁ from the upper surface 41 of the end surface forming plate 40 to the lower surface 24a of the projecting piece 21 in a state where the end surface forming plate 40 to be used is placed on the bottom plate 16. When
H ₁ = H ₀
(FIGS. 3A and 3B), the lower surface 24a of the projecting piece 21 becomes the reference height display.
Also,
H ₁ > H ₀
In this case, in consideration of the thickness t ₁ of the cutting saw blade and the thickness t ₂ to be ground in the end face polishing, the thickness added to H ₀ may be set to H 1. That means
“H ₁ = H ₀ ” or “H ₁ ≧ H ₀ + t ₁ + t ₂ ”
If it is good.
Of the four projecting sides, the two projecting pieces 21 and 21 facing each other are directly connected to the outer surface 13 of the side plate 12 and are not connected to the cuttable piece 27. Therefore, the two projecting pieces 21 correspond to “projections which are integrally connected to the outer surface 13 of the cylindrical base body 10 and are not connected to the cut-away means”. Further, the other two projecting pieces 21 and 21 are arranged at the positions of the cutable piece 27 and the cutout grooves 26 and 26.

(4) On the outer surface 13 of the side plate 12, two projecting pieces 21, 21 positioned symmetrically in diameter are arranged in parallel in the axial direction (length direction) from the lower surface 24 a of each projecting piece 21 to the lower edge 14 a of the side plate 12. 2 grooves (cuttable lines) 26 and 26 are formed. The groove 26 sets the depth direction to be substantially parallel with the corresponding grooves 26, 26 (FIG. 5B). A vertically long rectangular portion surrounded by the parallel grooves 26, 26 is defined as a cuttable piece 27. The grooves 26 and 26 form an upper end 26a at a position in contact with the lower surface 24a of the protruding piece 21 (FIG. 1B).
The groove 26 is formed at the lower end portion of the cylindrical base body 20 up to the height position of the lower surface 17a of the bottom plate 16, and the height from the lower surface 17a of the bottom plate 16 to the lower edge 14a is the same width continuously from the groove 26. The notch 28 is formed. Therefore, the outer surface 13 and the inner surface 13a of the side plate 12 of the cylindrical base 10 communicate with each other at the notch 28 portion.

(5) A groove 31 is also formed in the lower surface (outer surface) 17 a of the bottom plate 16 continuously from the notch 28. A portion surrounded by the grooves 31 and 31 of the bottom plate 16 also becomes a cuttable piece 32 and continues to the cuttable piece 27 (FIG. 6). A cut start piece 34 continuous to the cuttable piece 32 is continuously provided in a substantially horizontal direction toward the inside (the circular center side of the bottom plate 16) continuously to the cuttable piece 32. The cuttable piece 34 has substantially the same thickness as the cuttable piece 32 (the same thickness as the bottom plate 16) and is located slightly below. That is, an operator's finger or a jig used for opening can be inserted between the upper surface 35 of the cutting start piece 32 and the upper surface 17 of the bottom plate 16 (that is, the lower surface 41a of the mounted end surface forming plate 40). A gap is formed (FIG. 3B). Further, in the height direction, the lower surface 35 a of the cut start piece 34 is located at the same position or at least not protruding from the upper edge 14 a of the side plate 12 of the cylindrical base 10, and is located in the gap below the bottom plate 16. (FIG. 3B).
Further, the front end side of the cutting start piece 34 is formed in an arc shape and a circular through hole 36 is formed.

(6) Further, the bottom plate 16 is formed continuously with the reinforcing ribs 19 formed on the inner peripheral edge thereof, and the reinforcing ribs 33 and 33 having the same height are formed downward on the edges facing the grooves 31 and 31 (FIG. 6). ).

(7) As described above, the mold base 50 of the test piece 1 is configured by the cylindrical base 10 and the end face forming plate 40 (FIGS. 1A and 1B).

2. Use of mold 50 (opening method of mold)

  Next, the use of the mold 50, that is, the method for opening the mold 50 will be described.

(1) The end surface forming plate 40 is placed on the upper surface of the bottom plate 16 of the cylindrical substrate 10 (FIGS. 9A, 9B, 3B). The end surface forming plate 40 is, for example, a steel plate plated with zinc or the like having a thickness of t ₀ (= 1.5 mm). However, the end surface forming plate 40 may be made of aluminum or other materials, and may have any thickness. Set appropriately at about 3 mm.

(2) Subsequently, cement milk is poured into the excavated pile hole and mixed with stirring to form a soil cement layer in the pile hole. The soil cement (cement-based material) is collected from the soil cement layer with a sampling device and collected on the ground. The soil cement is taken out from the sampling device and injected into the cylindrical base 10 of the forming mold 50 on which the end face forming plate 40 is placed (FIG. 9C). At this time, if necessary (especially when the fluidity is low), the cylindrical substrate 10 is vibrated, and the soil cement 1A spreads over the outer peripheral side of the inner surface of the bottom plate 16 (the lower end side of the inner surface 13a of the side plate 12). Like that. At this time, the peripheral edge of the lower surface 41a of the end surface forming plate 40 and the upper surface 17 of the bottom plate 16 having a donut shape (having an opening on the center side) are in close contact with each other. . Further, since the end surface forming plate 40 has a certain degree of rigidity, there is no possibility that the vicinity of the center of the end surface forming plate 40 (portion located at the opening 18 of the bottom plate 16) is bent.
In this case, since the amount of soil cement to be injected should be at least larger than the lower surface 24a of the projection 21, which is the reference line display, it can be quickly injected before solidification is started without considering the exact amount of injection.

(3) The mold 50 filled with the soil cement 1A is cured at a predetermined curing place for a predetermined time (days) to solidify the soil cement 1B (FIG. 9 (c)).
During the operation of filling the soil cement 1A and the operation of moving the molding die 50 thereafter, the cut start piece 34 is located in the gap inside the side plate 12 of the cylindrical base 10 (the lower surface 17a side of the bottom plate 16). Therefore, in particular, since it does not protrude outward from the outer surface 13 of the side plate 12, there is no possibility that the cutting start piece 34 is erroneously operated due to an unexpected impact or the like. Further, in the cutable piece 27, upper ends 26a and 26a of the grooves (cuttable lines) 26 and 26 are covered with the protruding pieces 21, and further cuttable pieces 27 and 27 on the outer surface 13 side of the side plate 12 of the cylindrical base body 10. Therefore, there is no possibility that the cutable pieces 27 and 27 are impacted.

(4) After the soil cement 1B is solidified, when the molding die 50 is laid on a flat surface (the ground or a work table) 44 (arranged with the axis of the cylindrical base body 10 sideways), the protruding piece 21 does not roll. It is placed stably (FIG. 6 (a)). In this state, a soil cement 1B solidified together with the side plate 12 of the cylindrical base body 10 by inserting a cutting edge such as a circular saw along the lower surface 24a of the projecting piece 21 at a right angle with the axis of the side plate 12 of the cylindrical base body 10 is obtained. Disconnect. As a result, the side plate piece 12b with the projecting piece 21 is separated from the side plate piece 12a with the bottom plate 16 at the upper end portion of the cylindrical base 10 (FIG. 9D). Further, grooves (cuttable lines) 26 and 26 are exposed on the upper edge 14c of the side plate piece 12a of the remaining cylindrical base 10 (FIGS. 9E and 1C). Further, the soil cement 1B that has been cut and separated together with the side plate piece 12b is referred to as a soil cement 1Bb, the one that remains with the side plate piece 12a is referred to as a soil cement 1Ba, and the upper edge of the soil cement 1Ba is referred to as a cut surface 2 (FIG. 9). (E)).

(5) Subsequently, the cylindrical base body 10 is turned upside down so that the lower surface 17a of the bottom plate 16 faces upward (FIG. 9 (f)). In this state, if the cutting start piece 34 exposed on the lower surface 17a of the bottom plate 16 is pinched and pulled downward, the cuttable piece 27 is peeled off in order from the solidified soil cement 1Ba along the grooves 26 and 26. (FIG. 9G, FIG. 8A to FIG. 8C), the cutable pieces 27 and 32 with the cut start piece 34 are separated from the cylindrical base 10 (FIG. 9H, FIG. 8). (D) This separation is described in detail in (6) below). At this time, since there is the end face forming plate 40, there is no possibility that the solidified soil cement 1Ba is chipped in the vicinity of the bottom plate 16. Further, since the opening 18 is formed in the bottom plate 16 so that the bottom plate 16 has a donut shape (having an opening on the center side), the substantially radial groove 31 that cuts the bottom plate 16 can be shortened and further solidified. The load generated in the soil cement 1Ba can be reduced.
Subsequently, the remaining side plate 12a, bottom plate 16, and end face forming plate 40 of the cylindrical base body 10 are removed from the solidified soil cement 1Ba (FIG. 9 (h)).

(6) Based on FIG. 7, the operation of separating the cuttable piece 27 with the cutout start piece 34 and the cuttable piece (bottom plate side) 32 from the cylindrical base body 10 described above (FIG. 9 (h), FIG. d)) will be described in detail.
By using the tip of the cutting start piece 34 as the force point K, the connecting portion between the cuttable piece 32 and the cuttable piece 27 as the fulcrum M, and the tip 31a of the groove 21 (facing the opening 18) as the action point, A large force is applied to a certain “tip 31 a of the groove 31”, and cutting is started from the “tip 31 a of the groove 31”. After the start of cutting, cutting proceeds from the “tip 31 a of the groove 31” to the connection portion of the cutting start pieces 32 and 27, and at the same time, cutting continues to the grooves 26 and 26.

(A) Here, when a force is applied to the “tip of the cutting start piece 34”, which is the power point K, the “cutting start piece 34” becomes the “connecting portion of the cutable piece 32 and the cutable piece 27” (fulcrum M ) to make it easier to deform (rotational) and "connection of cut possible pieces 32 and cut possible piece 27" is the thickness t _11, and more thin, and low intensity (Fig. 7 ( a) (b)).
Further, in order to reduce the thickness t _11, it is formed with notches 37 on the lower surface side of the can piece 32 cut from the lower surface side. The notch 37 has an outer peripheral side wall 37a formed vertically along the inner surface of the cuttable piece 27, and a central side wall 37b having an arc shape. As a result, the bottom side of the cutout 37 (= “connection portion between the cuttable piece 32 and the cuttable piece 27” is a thickness t ₁₁ ) is made thinner, and the cuttable piece 32 is formed on the opening edge side of the cutout 37. set aside a thickness _{t 12 (2} times the _{t 12} is _{t 11).} Further, an arcuate curved surface 38 is formed on the upper side of the connection portion between the cuttable piece 32 and the cutout starting piece 34, and the wall thickness t ₁₃ is inclined between the arcuate curved surface 38 and the central side wall 37 b of the notch 37. has secured (sufficiently larger than _{t 11)} (FIG. 7 (b)). With the configuration as described above, the cutting start is guided by cutting from the tip 31a of the thinnest cutable piece 32.
(B) Further, by the deformation (rotation) of the “cutting start piece 34”, the cutting is started from the tip 31a of the groove 31 that is thinned and has the lowest strength. Further, the deformation ribs of the cutting start piece 34 cause the force to concentrate on the tip 31 a of the groove 31, so that the “both sides near the tip 31 a of the groove 31” are the reinforcing rib 19, the cuttable piece 32, and the cutting start piece 34. The thickness is increased by the “connecting portion” to increase the strength and make it difficult to deform (FIG. 7A).
(C) If it is difficult to manually open the cut start piece 34, a driver or the like can be inserted into the through hole 36 to deform (rotate) the cut start piece 34.

(7) As described above, the entire solid cement 1Ba is exposed to form the test piece 1 (FIG. 9 (i)).
This test piece 1 is used for a compression test or the like, similarly to the conventional test piece. When used in the compression test, the cut surface 2 and the bottom surface 3 of the test piece 1 are formed flat, and in particular, no other material (such as cement paste) adheres to the cut surface 2 portion by conventional capping, so that it solidifies. More accurate test results depending on the material can be obtained.

(8) In the above description, the cuttable piece 27 is opened after the soil cement 1B solidified together with the side plate 12 of the cylindrical base 10 is cut on the lower surface 24a of the protruding piece 21, but other procedures may be used. it can. For example, in a state in which the soil cement is solidified, the cylindrical base 10 is turned upside down so that the lower surface 17a of the bottom plate 16 faces up, and the upper end portion (the protruding piece 21 side) of the side plate 12 is connected. Then, similarly to the above, the cutting start piece 34 is pinched to separate the cuttable pieces 27 and 32 (FIGS. 11A to 11D). Thereafter, the side plate piece 12a is peeled off from the soil cement 1B, or the side plate piece 12a is attached to the soil cement 1B, the soil cement 1B is cut at the lower surface 24a of the projecting piece 21, and the test piece 1 is removed from the soil cement 1Ba. Form (not shown).

3. Other embodiments

(1) In the above embodiment, the protruding piece 21 is provided to provide functions such as display of the cutting position, protection of the grooves 26 and 26, and stable holding at the time of cutting. It is also possible to draw a line as a pattern on the outer surface 13 and install the projecting pieces 21 at other positions (not shown). Furthermore, if another means for protecting the groove 26 is provided, the protruding piece 21 can be omitted (not shown).

(2) Moreover, in the said embodiment, if the structure of the groove | channel 26, the cuttable piece 27, and the cutting start piece 34 cuts the cylindrical base | substrate 10 and can take out the solidified soil cement 1Bb from inside, it can also be set as another structure. Yes (not shown).

(3) In the above embodiment, the cutting start piece 34 is provided in the gap on the inner side of the side plate 12 of the cylindrical base 10 (on the lower surface 17a side of the bottom plate 16), so that it is stable without receiving an unexpected impact. It can also be provided at other positions (not shown). For example, the side plate 12 may be formed at the upper end portion, the intermediate portion, or the lower end portion. In this case, the side plate 12 is formed to have a certain thickness, and the cut start piece is placed within the thickness. It is desirable to arrange the start piece so as not to protrude outward from the outer surface 13 of the side plate 12 (not shown).

(4) In the above embodiment, the end face forming plate 40 is used. However, when the opening 18 is not formed in the bottom plate 16, it can be omitted (not shown).
For example, a cutting position display 46 is drawn on the outer surface 13 of the side plate 12 of the cylindrical base body 10 having the bottom plate 16 (FIG. 10A), and the soil cement 1A is filled up above the cutting position display 46 (FIG. 10). (B)). After predetermined curing, along with the solidified soil cement 1B, the side plate 12 is cut at the cutting position display 46 (FIG. 10 (c)), and the side plate piece 12b and the soil cement 1Bb are separated (FIG. 10 (d)). Subsequently, the cutting start means provided in the vicinity of the upper end 14c of the side plate piece 12b is operated to cut the side plate piece 12a, and the bottom plate 16 is cut, folded or bent, and the soil cement 1Ba. Is taken out to form the test piece 1 (FIG. 10E).

(5) Moreover, in the said embodiment, although the integrated side plate 12 was cut | disconnected and separated into the side plate (remaining) piece 12a and the side plate (separation) 12b, the side plate piece 12b formed separately from the side plate piece 12a is connected. It can also be configured. In this case, by forming the height H ₀ and the combined side plate piece 12a in advance in the test piece 1, by cutting the soil cement 1B solidified, with the side plates piece 12b, to separate the soil cement 1Bb. Here, the side plate pieces 12 can be peeled off from the soil cement 1B in advance, and only the exposed soil cement 1Bb can be cut and separated.
In this case, it is possible to connect the side plate piece 12b (the lower end has a reference height indication) to the opening edge of the molding frame of the conventional test piece opened at the upper portion to obtain the molding frame 50 of the present invention.

(6) Moreover, in the said Example, the operation protrusion plate 52 can also be erected radially with respect to the outer surface 13 of the side plate 12 in the lower end 14a (namely, vicinity of the bottom plate 16) of the outer surface 13 of the side plate 12 (FIG. 12, FIG. 13).
(A) In this case, the operation projecting plates 52, 52 do not come into contact with the grooves 26, 26, the cuttable piece 27, the cut start piece 34, etc. (cuttable means) involved in the cutting of the cylindrical base 10, and as much as possible Place it at a position away from. Therefore, it is desirable to arrange at a position orthogonal to the cuttable pieces 27 and 27 in the circumferential direction of the cylindrical base body 10 (side plate 12). Therefore, two operation projecting plates were formed at diametrically symmetric positions and arranged at the same position as the protective projecting piece 21 in the circumferential direction of the cylindrical base 10.
(B) Further, the operation projecting plate 52 is formed continuously to the lower edge 14a of the side plate 12 of the cylindrical base 10 in the axial direction of the cylindrical base 10 (FIGS. 12A, 12B, 13A). )). Although the operation projecting plate 52 is formed on the side plate 12 of the cylindrical base body 10, the base end portion 53 of the operation projecting plate 52 can also be formed continuously from the bottom plate 16 (not shown).
(C) Further, in the above description, the oblique sides 23 and 23 are continuous on the straight line 43 between the adjacent protruding pieces 21 and 21, and the straight line is in contact with the outer surface 13 of the side plate 14 between the adjacent protruding pieces 21 and 21. When the molding die 50 is laid on the flat surface 44 (FIG. 2D), the projecting piece 21 is grounded and the molding die 50 is stably placed (FIG. 6). In this case, the operation projecting plate 52 is always located inside the straight line 43 (flat surface 44), so that the stability of the molding frame 50 by the projecting pieces 21 and 21 can be maintained (FIGS. 13B and 13C). ).
In addition, the front-end | tip part 54 of the shaping | molding die frame 50 can also be formed so that it may correspond to the outer periphery of the protrusion 21 in planar view or bottom view, or may be located inside an outer periphery (not shown).
Further, the base end portion 53 of the operation projecting plate 52 is continuous from the distal end portion 54 (in a substantially parallel shape thinner than the projecting piece 21) and is continuously grounded to the outer surface 13 of the side plate 12 of the cylindrical base 10. (FIGS. 12B and 13B). Further, a reinforcing rib 55 is formed between the base end portion 53 of the operation projecting plate 52 and the outer surface of the side plate 12.
(D) Further, the operation projecting plates 52, 52 formed in this way are formed when the molding die 50 is molded from resin, when the molding die 50 is taken out from the “mold for molding the molding die 50”, or thereafter. It can also be used when handling 50.
(E) In the embodiment in which the operation projecting plate 52 is provided, the operation projecting plates 52 and 52 are arranged at positions where they do not come into contact with the grooves 26 and 26, the cuttable piece 27, the cut start piece 34, etc. (cuttable means). The lower edge 4a of the side plate 12 can be connected to the position of the cuttable piece 27 (not shown). In this case, it is desirable that each operation protrusion 52 does not protrude outward from the protrusion 21 positioned on the upper side in the circumferential direction. Further, in this case, the operation projecting plates 52, 52 can have a function as a cutting start piece, and the cutting start piece 34 provided on the bottom plate 16 side can be omitted (not shown).

DESCRIPTION OF SYMBOLS 1 Test piece 1A Unsolidified soil cement 1B Solidified soil cement 1Ba Remaining solidified soil cement 1Bb Solidified soil cement cut and separated 2 Solidified soil cement cut surface 3 Solidified soil cement bottom surface 10 Cylindrical substrate 12 Side plate 12a Side plate piece (Leave)
12b Side plate (separated)
13 Outer surface of side plate 13a Inner surface of side plate 14 Upper end of side plate 14a Lower end of side plate 14c Upper end of side plate piece 16 Bottom plate 17 Bottom plate top surface 17a Bottom plate bottom surface 18 Bottom plate opening 19 Bottom plate reinforcing rib 21 Projection piece (protective projection piece)
23 Oblique side 24 of the projecting piece Upper surface 24a of the projecting piece Lower surface of the projecting piece (reference height display)
26 Side plate groove (means that can be cut off)
27 Side plate cut-off piece (cut-off possible means)
31 Groove in bottom plate (means that can be cut)
31a Groove tip 32 Bottom plate cuttable piece (cuttable means)
33 Reinforcing rib 34 of the bottom plate Cutting start piece 35 Upper surface 35a of the cutting start piece Lower surface 37 of the cutting start piece 37 Notch 40 End face forming plate 41 End face forming plate upper face 41a End face forming plate lower face 43 Straight line 44 Flat surface (ground)
46 Cutting display (reference height display)
50 Molding mold 52 Operation veneer 53 Operational veneer base end 54 Operation vaginal tip

Claims (7)

A mold for producing a test piece of cementitious material having a height of H ₀ , wherein the mold is configured as follows.
(1) A bottom plate is formed at the lower end portion of the cylindrical side plate, opened upward, and a height H ₁ (H ₁ > H ₀ ) from the bottom plate inner surface to the upper edge is used as the cylindrical base.
(2) If necessary, place an end face forming plate on the inner surface of the bottom plate.
(3) The position of the height H ₀ from the inner surface of the bottom plate of the cylindrical base or the end face forming plate is displayed on the cylindrical base as a reference height display.
(4) On the side plate of the cylindrical base body, a substantially vertical cutting means is formed at least from the bottom plate to the reference height.
(5) A cutting start piece is connected to the cuttable means at an arbitrary position on the outer surface or side plate of the bottom plate of the cylindrical base.
(6) In the case where the cut-off starting piece forms a protrusion that is integrally connected to the outer surface of the cylindrical base body or connected to the outer surface of the cylindrical base body and that is not connected to the cuttable means. It was formed in a position and shape that does not protrude outwardly from the “projection”. A mold for producing a test piece of cementitious material having a height H ₀ , wherein the mold is configured as follows.
(1) A bottom plate is formed at the lower end portion of the cylindrical side plate, and the cylindrical base plate has a height H ₁ (H ₁ > H ₀ ) that opens upward and extends from the bottom plate inner surface to the upper edge.
(2) If necessary, place an end face forming plate on the inner surface of the bottom plate.
(3) The position of the height H ₀ from the inner surface of the bottom plate of the cylindrical base or the end face forming plate is displayed on the cylindrical base as a reference height display.
The cylindrical base has a lower cylindrical base piece on the bottom plate side from the reference height display, and an upper cylindrical base piece on the upper end side from the reference height display, and the cylindrical base body has an upper cylindrical base piece and a lower cylindrical piece. A cylindrical base piece is connected, or the cylindrical base is configured to be separable into an upper cylindrical base piece and a lower cylindrical base piece by the reference height display.
(4) On the side plate of the cylindrical base body, a substantially vertical cutout means is formed at least from the bottom plate to the reference height.
(5) A cutting start piece is connected to the cuttable means at an arbitrary position on the outer surface or side plate of the bottom plate of the lower cylindrical base piece.
(6) In the case where the cut-off starting piece forms a protrusion that is integrally connected to the outer surface of the cylindrical base body or connected to the outer surface of the cylindrical base body and that is not connected to the cuttable means. It was formed in a position and shape that does not protrude outwardly from the “projection”. The test piece mold according to claim 1, wherein the test piece mold is configured as follows.
(1) The cleavable means is a cleavable piece, and the cleavable piece is constituted by a portion surrounded by the two cleavable lines in parallel with two cleavable lines forming a thin portion.
(2) On the side plate of the cylindrical substrate, at least two of the cuttable pieces were formed in a symmetric position.
(3) The cuttable wire is extended to the bottom plate to form a cuttable piece on the bottom plate, and a cut start piece is formed on the outer surface side of the bottom plate continuously to the cuttable piece of the bottom plate.
(4) An end face forming plate having substantially the same cross-sectional shape as the test piece was placed inside the bottom surface of the cylindrical base. The test piece molding form according to claim 3, which is configured as follows.
(1) An opening was formed in the center of the bottom plate, a bottom plate cuttable piece was formed on the remaining peripheral edge of the bottom plate, and a cut start piece was continuously provided on the cuttable piece. The test piece mold according to claim 1, wherein the test piece mold is configured as follows.
(1) On the outer surface of the side plate of the cylindrical base, a plurality of protective protrusions are formed on the outer periphery of the cylindrical base so as to correspond to the reference height display.
(2) Of at least one set of the protective protrusions, a tangent line connecting the outer edges of the protective protrusions is formed between the protective protrusions on the outer surface of the side plate of the cylindrical base body. Touch. The test piece mold according to claim 1, wherein the test piece mold is configured as follows.
(1) An operation projecting plate is integrally connected to the outer surface of the side plate or the bottom plate of the cylindrical base.
(2) The operation projecting plate is connected to a “position not connected to the cutable means” or a “position including the cuttable means”. A method for opening a test piece molding mold, comprising: opening a mold forming a test piece filled with a cementitious material having a height H ₀ as follows.
(1) A cylindrical base having an upward opening and a height H ₁ (H ₁ > H ₀ ) from the inner surface of the bottom plate to the upper edge.
(2) An end face forming plate is installed on the inner surface of the bottom plate of the cylindrical substrate, and in this state, the cementitious material is filled to a height of at least a height H ₀ in the cylindrical substrate, Solidify the cementitious material.
(3) After the cementitious material is solidified, the solidified cement material and the side plate of the cylindrical substrate are cut at a height H ₀ from the upper surface of the end face forming plate.
(4) A cuttable piece surrounded by two cuttable lines is exposed on the side plate, and “directly to the cuttable piece of the side plate” or “a cuttable piece of the bottom plate continuous with the cuttable piece of the side plate” `` Through '', a cutting start piece is provided on the outer surface side of the bottom plate, and after (3) or before (3), the cylindrical substrate containing the solidified cementitious material is turned upside down to start the cutting The piece is manipulated to remove all or part of the cuttable piece, and all or part of the cuttable piece is separated from the cylindrical base and opened.
(5) The solidified cementitious material is taken out from the cylindrical substrate and used as the test piece.

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