JPH0627681B2 - Concrete test placing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). BACKGROUND OF THE INVENTION 1. Field of the Invention In the present invention, a quick-setting admixture and concrete mortar (herein, "concrete mortar" means "concrete" or "mortar"; hereinafter the same)) are uniformly stirred. The present invention relates to a concrete test-placing device that can discharge and form a sample body such as a test piece.

(b). 2. Description of the Related Art Recently, when constructing a tunnel lining, concrete mortar added with a quick-setting agent is supplied between the ground and the moving form without using spraying, and the lining is performed. Building is being done.

(c). However, in such a case, when making a test piece in a strength test or the like, concrete mortar to which a quick-setting agent is added is poured into a concrete mortar, that is, a moving mold. In many cases, it is not possible to collect it from the inside because it interferes with the frame of the formwork.

In addition, at the construction site, in order to confirm the degree of addition of the quick-setting admixture to the concrete / mortar, the behavior of the concrete / mortar after the addition of the quick-setting admixture may be observed.・ To directly mix the mortar and the quick-setting admixture using a moving mold device,
It has a drawback that it requires a large amount of work and the workability is poor.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a concrete test placing device capable of supplying concrete and mortar and a quick-setting agent in a mixed and agitated form. .

(d). Means for Solving the Problems That is, the present invention has a concrete supply pipe (2), and a plurality of stirring blades (5a, 5a, 5g)
Are rotatably driven through the rotary shaft (5) and are multiply provided in the concrete / mortar supply direction, and the rotary shaft (5) and at least one stirring blade (5a) are provided.
Is provided with a quick-setting agent supply means (5c, 5d).

It should be noted that the numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The same applies to the section "(e). Action" below.

(e). Action With the above-mentioned configuration, the present invention provides a means for supplying the quick-setting agent provided on the rotating shaft (5) and the stirring blade (5a) to the concrete mortar (6) supplied from the concrete supply pipe (2). The quick-setting admixture (7) is added from (5c, 5d), and the concrete mortar (6) and the quick-setting admixture (7) are stirred and supplied by the stirring blades (5a, 5g) so as to be uniform. Acts like.

(f). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a concrete test placing device according to the present invention, and FIG. 2 is a view of the discharge port portion of the concrete test placing device shown in FIG.

As shown in FIG. 1, the concrete test placing device 1 is
The concrete transport pipe 2 has a concrete transport pipe 2, and a concrete mortar pumping means such as a concrete pump (not shown) is connected to the concrete transport pipe 2. A tip portion 2a of the concrete conveying pipe 2 is formed in a shape that is bent slightly upward in the figure, and a cylindrical cover 3 made of a flexible material such as rubber is attached to the tip portion 2a. Tip 2a
Are connected so as to cover the outer periphery of the. The cover 3 extends to the left in the figure, and its tip portion is a discharge port 3a having a circular cross section. Further, a hollow rotary shaft 5 is provided in the concrete transport pipe 2 so as to be rotatably driven so as to penetrate the pipe wall 2b of the concrete transport pipe 2, and at a position corresponding to the cover 3 at the tip of the rotary shaft 5. Has two stirring blades 5a and 5g
Is the arrow A, which is the direction of concrete and mortar supply,
It is provided so as to be doubled in the B direction. Each stirring blade 5
As shown in FIG. 2, a and 5g have four blades 5b formed at a 90 ° pitch, and each blade 5b of the stirring blade 5a on the right side of FIG. As shown in FIG. 1, the quick-setting agent supply paths 5c and 5d to which the quick-setting agent is supplied are formed to communicate with each other. The surface 5e of each blade 5b of the stirring blade 5a is provided with a large number of quick-setting agent adding holes (not shown) so as to communicate the quick-setting agent supply passage 5d with the outside.

On the other hand, on the right side of the rotary shaft 5 in FIG. 1, a drive motor 10 is rotatably driven via a swivel joint 9, and the swivel joint 9 is provided with a quick-setting agent supply pipe 11
Is provided in a form capable of supplying the quick-setting admixture 7 to the quick-setting admixture supply passage 5c formed in the rotary shaft 5.

Since the concrete test placing device 1 has the above-mentioned configuration, the concrete test placing device 1 is used to remove the concrete mortar 6 from the concrete mortar 6.
It is supplied in the form of adding the quick-setting admixture 7 to prepare test pieces such as test pieces, or the concrete after adding the quick-setting admixture 7
When observing the behavior of the mortar 6, first, a concrete pump (not shown) is driven to supply the concrete mortar 6 to be placed to the concrete conveying pipe 2. Concrete supplied to the concrete carrier pipe 2
The mortar 6 is fed from the right side of FIG. 1 in the direction of the cover 3,
Further, the liquid is discharged and supplied to the outside from the discharge port 3a after passing between the stirring blades 5a and 5g. At that time, the drive motor 10 is driven to rotate the rotary shaft 5 and the swivel joint 9 is used to rapidly drive the rotary shaft 5. From the binder supply pipe 11, the quick binder 7 is supplied to the quick binder supply passage 5c of the rotary shaft 5. Then, the stirring blades 5a and 5g in the cover 3 rotate together with the rotation of the rotary shaft 5 to stir the concrete mortar 6 that has been pressure-fed in the concrete transport pipe 2 toward the discharge port 3a. Further, the quick-setting admixture 7 is added and supplied through the quick-setting admixture supply paths 5c and 5d from the quick-setting admixture addition holes provided in each blade 5b of the stirring blade 5a, and the added quick-setting admixture 7 is concrete. Along with the mortar 6, the stirring blades 5a and 5g, which are doubly provided, uniformly stir the mixture to discharge it from the discharge port 3a to the outside.

Although the concrete / mortar 6 contains a large amount of aggregate, since the cover 3 that covers the outer periphery of the stirring blades 5a and 5g is made of a flexible material, such aggregates are not included. Even if the material or the like is sandwiched between the tip 5f of the blades 5b of the stirring blades 5a and 5g and the cover 3, the cover 3 is deformed, so that the aggregates or the like are caught between the blades 5b and the cover 3. There is no such a case, and the stirring operation of the concrete mortar 6 and the quick-setting admixture 7 by the stirring blades 5a and 5g is smoothly performed.

In addition, although the above-mentioned embodiment described the case where two stirring blades 5a and 5g for stirring concrete and mortar were provided, the present invention provides multiple stirring blades 5a and 5g in the supply direction of concrete and mortar. As a matter of course, any number of two or more may be provided.

(g). EFFECTS OF THE INVENTION As described above, according to the present invention, the concrete feeding pipe 2 and other concrete feeding pipes are provided, and a plurality of stirring blades 5a are provided at the tip of the concrete feeding pipe for feeding concrete and mortar. 5g are rotatably driven through the rotary shaft 5 and are multiply provided in the concrete / mortar supply direction, and the rapid-setting agent supply paths 5d, 5c, etc. are provided to the rotary shaft 5 and at least one or more stirring blades 5a. Since the quick-setting agent supply means is provided, the concrete-mortar 6 is supplied with the quick-setting agent 7 via the quick-setting agent supply paths 5d and 5c, and a plurality of stirring blades 5a are driven to rotate. ,
It is possible to obtain concrete mortar 6 in which 5 g is mixed in a uniform state and immediately mixed with the quick-setting agent necessary for producing a test piece or the like immediately from the discharge port 3a.
Therefore, in order to create the test piece, it is not necessary to perform the difficult work such as collecting the concrete mortar mixed with the quick-setting admixture directly from the moving form, and the concrete-mold containing the quick-setting admixture is not required. Even when observing the behavior of the mortar, it is possible to perform the work only with the main test placing device 1, and it is not necessary to perform a large-scale work using the movable formwork, so that the workability is significantly improved. .

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a concrete test placing device according to the present invention, and FIG. 2 is a view of the discharge port portion of the concrete test placing device shown in FIG. 1 ... Concrete test placing device 2 ... Concrete supply pipe (concrete transfer pipe) 5 ... Rotary shafts 5a, 5g ... Stirring blades 5c, 5d ... quick-agent supply means (quick-agent supply path) 6 …… Concrete and mortar 7 …… A quick setting agent

Claims (1)

[Claims] 1. A concrete supply pipe, wherein a plurality of stirring blades are rotatably driven through a rotary shaft at a tip portion of the concrete supply pipe for supplying concrete / mortar and a concrete / mortar supply direction. A concrete test placing device, wherein the concrete test placing device is provided in multiple layers, and the rotating shaft and at least one stirring blade are provided with a quick-setting agent supply means.