JP3032516U - Civil engineering concrete block - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a concrete block that is relatively easy to manufacture and finished at a low cost, and that has a high-class feeling and a solid feeling and is also excellent in design. [Structure] The concrete base 10 is molded by pouring concrete into a mold or the like, and then a mortar-made mounting part 11 is fixed to one end surface of the concrete base 10. The concrete base 10 integrally includes a quadrangular joint end portion 12 and a holding portion 13 extending from the joint end portion,
The mounting part 11 is fixed to the entire end surface on the side of the joint part 12.
Then, the surface 11a of the covering portion 11 is subjected to shot blasting to remove the cement paste. Therefore, the covering part 11 is an aggregate 1 such as sand contained in the mortar.
4 and 15 seed stones are exposed, and the design is greatly improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete block for civil engineering used for retaining walls such as roads and revetment work.

[0002]

[Prior art]

 In general, concrete block called "Machimo block" is widely used for retaining walls and revetments for roads. This concrete block is molded using concrete as a base, but the surface parts such as retaining walls are fixed to the concrete base as surface mounting parts made of mortar.

Conventionally, concrete blocks such as those shown in FIGS. 5 and 6 have been known as such concrete blocks.

In FIG. 5 and FIG. 6, A is a concrete base, B is a surface mounting portion fixed to its end surface, and these concrete blocks are made into a concrete base A by injecting concrete into a mold and thereafter. It is manufactured by crimping the mortar injected into the mold as the surface part B to the end surface of the concrete base A. The concrete block shown in Fig. 5 is a type in which the surface of the covering part B is flat, and the concrete block shown in Fig. 6 has a convex shape on the surface of the covering part B to improve the design. Is.

FIG. 7 is a cross section of the concrete block shown in FIG. As shown in this figure, when the mortar is solidified, the cement paste P having a small specific gravity covers the surface of the mounting portion B, and thus the surface of the mounting portion B is very dense. .

[0006] Here, A1 is referred to as a joint end portion of the concrete base A, and A2 is referred to as a back portion extending from one end surface of the joint end portion A1, which are integrally formed of concrete, but are not joined to the concrete product block. The end portion A1 has various shapes such as a quadrangular shape as shown in FIGS. 5 and 6 and a triangular shape or a pentagonal shape. Further, these concrete block blocks can prevent falling rocks as a retaining wall for roads, and can be used for revetments such as rivers and levees to prevent ground erosion.

[0007]

[Problems to be solved by the device]

 However, according to the conventional concrete block described above, since the covering portion is made of porous mortar, it is easy to get dirty, and when the retaining wall is constructed, the outer wall surface is composed of the monotonous covering portion, so There was no feeling or profoundness, and the design was poor and it did not look good.

[0008] For this reason, conventionally, those in which natural stones are fixed to the covering portion, or the natural stones are used to make an uneven pattern, etc., have been developed, but each requires a lot of materials and equipment, Moreover, there was a problem that the cost during production was high due to the troublesome work during production.

Therefore, the present invention provides a concrete block that is relatively easy to manufacture and finished at a low cost, has a high-class feeling and solid feeling, and is excellent in landscape and environmental design. Is what you are trying to do.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention integrally forms a polygonal joint end portion and a retaining portion extending from the joint end portion with concrete, and provides a mounting portion made of mortar on the end face on the joint end portion side. In the fixed truncated pyramidal concrete block for civil engineering, a shot blasting process was applied to the surface of the covering part, and the cement paste on the surface of the covering part was peeled off. Is provided.

Particularly, in a more preferred embodiment of the present invention, seed stone having a particle size of 5 mm to 10 mm is added to mortar as an aggregate. In addition, a pigment is added to the mortar to color the exterior part.

[0012]

[Action]

 According to the present invention, when the steel particles are shot-blasted on the surface of the cover part, the cement paste on the surface is peeled off, and aggregates such as sand and seed stone which are the components in the mortar are exposed. Become.

Therefore, the design is remarkably improved, and a high-class feeling and a solid feeling are created. Especially when it is used for retaining walls and revetments, it will be in good harmony with the surrounding landscape and show a wonderful view.

[0014]

[Embodiment of device]

 Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings. Figure 1 shows a retaining wall on the side of the road. In FIG. 1, 1 is a roadway, 2 is a sidewalk, and 3 is a retaining wall. The civil engineering concrete block 4 according to the present application is used, for example, in constructing such a retaining wall 3.

Next, FIG. 2 shows a cross section of the retaining wall 3. Reference numeral 5 is a foundation quarry stone laid by excavating the ground, 6 is basic concrete laid on the foundation quarry stone, 7 is backfilled rubble provided on the construction surface of the retaining wall 3, and concrete block 4 is, for example, backfilled. The stones 7 are sequentially piled up on the foundation concrete 6 along the laying surface.

In particular, the concrete slabs 4 are filled with the interlocking concrete 8 to fix them to each other. In FIG. 2, numeral 9 is a pipe for draining water, and the water in the retaining wall 3 is discharged to the outside through the pipe 9.

Next, FIG. 3 is a perspective view showing an example of a concrete block according to the present invention. Reference numeral 10 is a concrete base made of concrete, and 11 is a mortar surface mount, which are integrally joined to each other to form a truncated quadrangular pyramid.

The concrete base 10 is formed by integrally molding a quadrangular joint end portion 12 and a retaining portion 13 extending from one end surface of the joint end portion 12. Of these, the end surface on the joint end portion 12 side is formed. The cover part 11 is fixed.

The mounting portion 11 is fixed to the entire end surface on the joint end 12 side with a required thickness, and its surface 11a is shot blasted in particular.

Here, the shot blasting is to project steel particles by compressed air or centrifugal force as is well known, and in the present application, the steel particles are projected onto the surface 11a of the mounting part 11 as the shot blasting. are doing.

FIG. 4 is an enlarged plan view showing a part of the surface 11a of the cover part, 14 is an aggregate such as sand contained in the mortar, and 15 is an aggregate of 5 mm to 10 mm. A seed stone with a grain size is shown. As is clear from this figure, the surface 11a of the mounting portion is exposed in a state where the cement paste is peeled off by the shot blasting process and the aggregates 14 and the seed stones 15 are irregularly dispersed.

Therefore, in the concrete block 4 of the present application, the surface 11a of the surface mounting part 11 is not a monotonous surface where the cement paste is raised unlike the conventional product, but the aggregate 14 and the seed stone contained in the mortar are used. 15 gives an elegant finish with a natural pattern. In addition, a pigment is added to the mortar to color the surface mounting portion 11 such as red or green.

Note that the pigment is a cement pigment such as carbon black, amba, and rouge, and does not hinder the setting and stability of cement in the mortar.

Here, in order to manufacture the concrete block 4 of the present application, first, concrete is poured into a predetermined mold to mold the concrete base 10. Concrete is cement, water, fine aggregate, and gravel, crushed stone, and other coarse aggregates, and in some cases these admixtures are added and mixed, then poured into a metal frame, and after this is solidified. , The outer cover 11 is fixed to one end surface thereof.

The fine aggregate is an aggregate containing 85% or more of particles having a particle size of 5 mm or less such as sand, and the coarse aggregate is a particle having a particle size of 5 mm or more such as gravel or crushed stone. Is contained in an amount of 85% or more.

The covering part 11 is a concrete base having the shape of the form by injecting mortar into a predetermined form and crimping the mortar onto the concrete base 10 using a press or the like, and then removing the form to solidify it. It is fixed to 10. It should be noted that the mortar is prepared by adding an aggregate 14 such as sand, a seed stone 15 as another aggregate, and water to the cement, and preferably adding the pigment as described above and thoroughly kneading the mixture. .

Then, after the mortar is solidified, the surface 11a of the surface mounting part 11 is subjected to shot blasting, whereby the cement paste solidified in a state of being floated on the surface 11a of the surface mounting part 11 is peeled off, and the bone is removed. The material 14 and the seed stone 15 are exposed.

By the way, by adding various sands, especially seed stones 15 as the aggregates 14 to the mortar which is a constituent material of the cover part 11, various colors and patterns are given to the surface 11a of the cover part 11. be able to. For example, in addition to white sand such as Shirakawa sand as the aggregate 14, sand such as red or black is used, or as the seed stone 15 crushed stones having various color tones of 5 mm to 10 mm are added. By doing so, a wide variety of finished surfaces can be created.

The specific example of the present invention has been described in detail above with reference to the drawings. However, the concrete product block according to the present application may have a convex shape as shown in FIG. Also, the joints between the cover and the concrete base can be triangular or pentagonal.

[0030]

[Effect of device]

 As is clear from the above description, according to the present invention, since the cement paste is peeled off by shot blasting the surface of the mounting part made of mortar, the aggregate contained in the mortar is exposed and graceful. In particular, the addition of seed stone as an aggregate further improves the aesthetics, and when a retaining wall is constructed using this, a magnificent view can be obtained.

Further, since the conventional product can be used as it is, mass production can be performed without a large change in the manufacturing process, and the capital investment can be reduced, which is also advantageous in terms of cost.

Furthermore, the aggregates such as sand and seed stones added to the mortar are rich, and the design can be easily changed by changing the addition amount, color tone and size of the aggregate, and the pigment can be added to the cover part. A wide variety of products can be manufactured by coloring with.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of a retaining wall constructed beside a road.

[Figure 2] Cross section of the retaining wall

FIG. 3 is a perspective view showing a concrete block according to the present invention.

FIG. 4 is a plan view showing an enlarged part of the surface of the cover part.

FIG. 5 is a perspective view showing a conventional concrete block.

FIG. 6 is a perspective view showing a conventional concrete block.

FIG. 7 is a sectional view showing a conventional concrete block.

[Explanation of symbols]

 4 Concrete Block 10 Concrete Base 11 Surface Part 11a Surface 12 Joint End 13 Resting Part 14 Aggregate 15 Seed Stone

Claims (3)

[Scope of utility model registration request] 1. A truncated polygonal pyramid in which a polygonal joint end portion and a back portion extending from the joint end portion are integrally molded with concrete, and a surface mounting portion made of mortar is fixed to the end face on the joint end portion side. In the concrete block for civil engineering, the surface of the covering part is subjected to shot blasting, and the cement paste on the surface of the covering part is peeled off. 2. The particle size of the mortar as aggregate is 5 mm to 1
The concrete block for civil engineering according to claim 1, further comprising 0 mm of seed stone. 3. The civil construction concrete block according to claim 1, wherein a pigment is added to the mortar to color the exterior part.