JPS62142602A - Concrete block using surface layer as decorative surface layer and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete block whose surface layer is a decorative surface layer by immediate demolding using only hard-mixed concrete with zero slump, and a method for manufacturing the same.

Conventionally, concrete blocks used for retaining walls and earthen walls as intended by the present invention are formed by vibration and compression using hardened concrete with zero slump in order to take an immediate demolding method. There is. However, in the case of forming with this hardened concrete/crete, the surface (joint surface of the rfU concrete) is rough and has many bubbles and high water absorption, so the concrete may weather and deteriorate. Not only was it difficult to withstand long-term use, but it was also aesthetically unsatisfactory and had no value as a product. For this reason, when molding this type of block, mortar is placed on a surface pallet, and the mortar is piled up and molded using the surface pallet itself to form a smooth decorative surface layer.

However, the decorative surface of the block formed in this way is
Since the dissimilar materials of hard mixed concrete and mortar are in contact with each other, the decorative surface tends to peel off, and the mortar decorative surface is weak in strength, so it is prone to chipping due to impact.

As a result of intensive research to solve these drawbacks, the inventor of the present invention improved the strength of the decorative surface by molding the decorative surface using only hardened concrete without using mortar on the surface pallet. To provide a co/crete block that maintains the same beauty in appearance as the decorative surface of conventional blocks, and a method for manufacturing the same.

The present invention uses only hard-mixed concrete with zero slump without applying mortar to the surface pallet, and pours an appropriate amount of water onto the surface pallet, or evenly supplies an appropriate amount of water to the upper layer of the hard-mixed concrete. It is then molded by vibration and compression, and during this molding process it becomes hard! The p-concrete 1 is replenished at the joint surface of the surface pallet and transformed into a soft concrete-like state by adding water, which improves fluidity and eliminates voids and bubbles, making it denser and creating a smooth surface of the block. A block to be used as a surface and a manufacturing method thereof,
As a result, the surface of the molded block has a smooth decorative surface even though hard-mixed concrete is used, and there is no bonding layer between hard-mixed concrete and mortar as in the conventional molding method, and it is made of the same type of concrete. Since the decorative layer is formed by coating 17-, peeling of the surface and chipping during use do not occur.

Next, the method of the present invention will be explained with reference to examples shown in the drawings.

The embodiment shown in Fig. 1 shows a molding machine using a split formwork that is divided into left and right parts or a formwork (1) that is integrated.In both cases, a surface pallet (2) is arranged at the bottom of the formwork. First, an appropriate amount of water W is added to the surface pallet (2) to soften a part of the hard mixed concrete.
Depending on the conditions, filling may be carried out after placing a surface pallet on the inner bottom of the mold, or a surface pallet (2) to which water W has been added in advance may be placed on the inner bottom of the form. Then, as detailed below, hard mixed concrete C is poured into the formwork (1), and vibration is applied from the bottom of the surface pallet (2) to transform the hard mixed concrete that is in contact with water into a fluid soft wire. It is used to form a decorative surface having a finely smooth surface in the shape of a seam. In FIG. 1, (1) shows the formwork, and (2) shows the surface pallet. (3
) is a vibrating table on which a surface pallet is placed, and (4) is a diaphragm, with a vibrating table (3) on the top and a vibrator (5) on the bottom. This camera (5) is attached to the lower surface of the diaphragm (4) as shown in the figure, and this attachment position is assumed to be the most effective position by 1 degree depending on the shape and dimensions of the block. (6) is a hopper for storing hard mixed concrete with zero slump, and a material feeding surface (7) for supplying to the formwork (1) is provided below. Then, this material feeding surface (7) t is placed at the upper opening of the formwork.
9) moves forward and backward by the operation of
Feed material 0. (8) is a miscellaneous press that compresses and compacts the upper part of the block, and is fixed in front of the material feeding surface (force) and operates in unison with the material feeding surface (7), and is a press rod Ql of the cylinder 〇 for pressing. ) to space the concrete material C in the formwork between the suppressed parts.

FIG. 2 shows automatic water filling of the surface pallet (2), and when the surface pallet (2) moves in the direction of the arrow, metering water W is injected by the water injection nozzle <13). The surface pallet (2) that has been injected with water in this way is placed in the bottom of the formwork, and the concrete IJ-0 is fed into the vibrator (5).
starts and molding begins.

Fig. 3 shows an example of an inverted type block forming machine, in which the formwork (1) is inverted and concrete is fed from the surface with a large area to overturn the surface pallet (2). It is molded by a press, turned around by a rotating shaft, and removed from the mold downward.

The same parts in the figure are indicated by the same numbers as in Fig. 1, so their descriptions are omitted, but in the case of this formwork type, there is a water supply nozzle (13) in front of the material supply surface (7). , hard mixed concrete material C is fed into the formwork (1) by the forward movement of the cylinder (9), and when it retreats, an appropriate amount of water is poured onto the upper surface of the concrete by nozzle 0,
Overturn the surface pallet (2) from above, start the vibrator (5) and press plate (8) to complete the molding, and the rotating shaft (14)
), the mold (1) is inverted and demolded downward. Reference numeral Q51 in the figure is a guide rod that accurately positions the press plate (8) vertically.

The present invention has been explained above, and in the present invention, by pouring an appropriate amount of water onto the surface of a surface pallet or concrete IJ, a part of the hard-mixed concrete is automatically turned into a soft linear shape by vibration and compression during the forming process. It changes to give it fluidity and removes air bubbles and voids to create a dense and smooth decorative surface.
This eliminates the need to mix and manufacture mortar separately in the factory as in the past, and the molded product has a concrete-colored surface.There is no discoloration like with conventional white mortar, and there is no mortar layer. It is easy to remove the surface pallet after curing, and there is no need for forced peeling such as punching, so there is no need to remove the surface pallet or the decorative surface due to damage. The effect is extremely remarkable, with no visible defects.

[Brief explanation of drawings]

FIG. 1 shows an embodiment using a left-right opening/closing type or integral type formwork, and FIG. 2 shows an embodiment showing water injection into a surface pallet. Further, FIG. 3 shows an embodiment of a formwork of an inverted demolding type. (1)...Formwork (2)...Surface pallet (5)...
・Vibrator A3...Water injection nozzle Figure 1 Figure 2 Figure 3 Procedure amendment (self-motivated) Showa G, Yuzuki/Rho day

Claims (1)

[Claims] 1. A concrete block whose surface layer is made into a decorative surface layer by immediate demolding using hard mixed concrete with zero slump. 2. A method for manufacturing concrete blocks, in which a suitable amount of water is poured onto a surface pallet or concrete surface, only hard mixed concrete with zero slump is filled into a formwork, and the surface layer is formed into a decorative surface layer by vibration and pressure.