JPH03189102A - Preparation of cloth-textured concrete block - Google Patents

Abstract

PURPOSE:To obtain a dense texture which has strong resistance to freezing and melting and to improve the durability of a block product by spreading a fabric sheet in a concrete form and casting a concrete material thereon to cure it. CONSTITUTION:A fabric sheet 2 is spread in a concrete form 1 in such a way that the inner bottom face and each inner side face are covered with the fabric sheet 2, which is fixed by means of a proper device so as not to be positionally shifted. A concrete material 3 with a lowly adjusted water-cement ratio to obtain a necessary and enough fluidity for a casting operation is placed in the concrete form from the upper side of the fabric sheet 2. By peeling off the fabric sheet 2 from a block product 4, the block product 4 on the surface of which the fabric texture 5 of the fabric sheet 2 is transferred is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing various concrete blocks such as pedestrian and roadway boundary blocks and retaining wall blocks by pouring.

[Prior art] A conventional manufacturing method uses a hard-mixed concrete material and presses and forms the concrete material into a formwork using a press plate, and then immediately removes the product from the formwork and cures it. known from.

According to this instant demolding method, a block that is resistant to freezing and thawing can be obtained due to the high water-to-cement ratio, but air bubbles from molding remain on the surface of the block, causing avatars and spots, and forming a rough surface. The problem is that it can be done.

On the other hand, there is also already known a manufacturing method in which a soft concrete material is poured into a mold and the product is removed from the mold after curing and hardening.

According to this pour molding method, there are no avatars or spots due to residual air bubbles on the block surface, but the low water-cement ratio makes it susceptible to freezing and thawing, and the block surface is formed into a highly reflective smooth surface. Therefore, pedestrian and roadway boundary blocks, retaining wall blocks, and the like have the disadvantage of increasing eye fatigue for vehicle drivers.

[The problem that the invention attempts to solve I#! ] Therefore, an object of the present invention is to provide a method for producing a concrete block with a texture pattern, which is resistant to freezing and thawing and can significantly reduce eye strain on the driver, although the method basically uses a pour molding method. That's true.

[Means for Solving the Problems] Hereinafter, it will be explained using the reference numerals in the attached drawings. In the method for manufacturing a concrete block with a texture pattern of the present invention, a cloth sheet 2 is passed through a formwork 1.

A concrete material 3 is poured onto the cloth sheet 2 and cured to harden, and the cloth sheet 2 is peeled off from the surface of the block product 4 during or after demolding.

[Example] In the example shown in Fig. 1, a cloth sheet 2 is laid in the form l so as to cover the inner bottom surface and each inner surface, and the cloth sheet 2 is spread by appropriate means so as not to shift. Sheet 2 is fixed.

The concrete material 3 is poured into the formwork 1 from above the cloth sheet 2, with the wood-cement ratio adjusted to be low in order to obtain sufficient fluidity for pouring work.

After curing and hardening the concrete material 3 in the form l, when the cloth sheet 2 is peeled off from the block product 4, a block with the grain pattern 5 of the cloth sheet 2 transferred to the surface part as shown in FIG. 2 is obtained. Product 4 is obtained.

The peeling of the fabric sheet 2 from the block product 4 is carried out when the block product 4 is removed from the form l if the fabric sheet 2 is directly fixed to the form l. On the other hand, when the cloth sheet 2 is not fixed to the formwork l, the cloth sheet 2
is removed from the formwork 1 while adhering to the block product 4, and then peeled off from the block product 4.

As the cloth sheet, in addition to knitted cloth, towel cloth, etc., a sheet impregnated with a water-absorbing polymer can also be used, thereby making it possible to improve the water-to-cement ratio. Further, the cloth sheet can be laid on one part of the formwork instead of on all sides.

[Effects of the Invention] As described above, in the manufacturing method of the present invention, the fabric sheet 2 is molded into the formwork 1, and the concrete material 3 is poured over the fabric sheet 2 and cured, so that the fabric sheet 2 is molded. Excess water in the concrete material in the adjacent surface area is absorbed by the cloth sheet 2, increasing the wood-cement ratio in the surface area, resulting in a dense structure that is resistant to freezing and thawing, and improving the durability of the block product 4. Improves sex.

Further, in the manufacturing method of the present invention, the grain pattern 5 of the cloth sheet 2
is transferred onto the block product 4, which not only provides an aesthetically pleasing appearance, but also because the surface of the block product 4 has excellent diffuse reflection properties, which can significantly reduce the strain on the driver's eyes. can.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal cross-sectional view of a formwork used in carrying out the method of the present invention, showing a state in which concrete material is poured over a cloth sheet. FIG. 2 is a front view of the block product with the cloth sheet removed after curing and curing. '1rtX1 Otohoki Z Prisoner, Da

Claims (1)

[Claims] A cloth sheet 2 is laid in a formwork 1, a concrete material 3 is poured over the cloth sheet 2 and cured, and the cloth sheet 2 is peeled off from the block product 4 during or after demolding. How to make blocks.