KR100198022B1 - Method of manufacturing high pressed pervious blocks having fine aggregate layer - Google Patents

Abstract

The present invention relates to a method for producing a block having a high surface strength and permeability as well as a small surface roughness due to the small pore size of the surface layer, which passes 100% in a 19mm sieve and 95-100% in a 13mm sieve. Cement: 300 ~ 500kg, water: 25 ~ 40% by water-cement ratio, water reducing agent: Mixture within 2% by weight of cement Putting the first into the mold of the block to clean the surface and then pressurize the first vibration; Cement: 300 ~ 500kg, water: water-cement ratio for 1m3 by aggregate maximum compaction weight which passes 100% in 5mm sieve and less than 10% in 1mm sieve on top of the first vibration pressurized mixture in the electric process 25 to 40% as a guide, reducing agent: adding a mixture of less than 2% by weight of the amount of cement to form a thin layer to form a thin layer after the second vibration pressing step; And removing the molded article formed in the electrical process from the mold and drying the molded article according to a conventional steam curing or dry curing method. To provide a fine-grain high-pressure permeable block manufacturing method comprising a.

Description

Fine grain high pressure pitch block manufacturing method

The present invention relates to a method for manufacturing a block used for sidewalks or roadways, and more particularly, the surface of the block by forming a fine-grained permeable concrete layer on top of the general permeable concrete layer It relates to a method for producing a smooth, high strength permeable block.

Conventional general blocks are used only for sidewalks due to their low strength, but if a heavy object such as a vehicle passes over them or the bottom surface is uneven due to ground subsidence, there is a problem of being easily broken.

In addition to the general block, a high pressure block has also been used, but the high pressure block is manufactured in an airtight manner, and thus has a very low water absorption rate and thus no water permeability. Moreover, when such a conventional high pressure block is used for sidewalks and roadways, it is common for the gap between the block and the block to be filled with an impermeable material such as sand, clay, cement, or the like. As such, when a conventional high pressure block is used for sidewalks and roadways, the underground ecosystem cannot be destroyed because rainwater can not penetrate into the basement. Flooding in urban streams, depletion of groundwater, and resulting ground deformation can occur.

In order to solve these problems of the conventional block, there is a 'pattern porous panel manufacturing method' invented and patented by the applicant (Patent Publication No. 96-11336). The panels (blocks) produced by this method are not only permeable but also very high in strength. However, since this method uses a relatively coarse aggregate of 13 to 4 mm, the panel (block) produced by this method is not smooth in surface, and surface particles are likely to fall out of impact from the outside. In addition, since the panel has large surface pores, foreign matter enters between the pores, so that the pores are difficult to clean, and as a result, the function of the pitcher is easily degraded.

The present invention has been proposed to solve these problems of the conventional block, the object of the present invention is not only high strength and permeability, but also the surface is not rough, fine-grained high-pressure water permeable block that can make various and easy coloring It is to provide a manufacturing method.

Another object of the present invention is to reduce the surface voids of the block to prevent foreign matters from entering into the voids, and furthermore to prepare a fine-grain high-pressure water permeable block that can be easily removed by water cleaning or simple broom cleaning To provide a way.

1 is a process flow diagram of an embodiment of the present invention.

The present invention for achieving the above object consists of four processes, summarized as follows.

1st process: The process of vibrating or vibrating pressurizing after mixing the surface which mixed water, aggregate, cement, a water reducing agent, etc. to the mold of a block based on a normal permeable concrete mixing ratio.

Second step: Immediately after the electrical process, a mixture of fine sand, sand, cement, water, pigment, and water-reducing agent is added to the top of the permeable concrete layer to form a thin layer (5-20 mm). After vibration pressurizing process.

3rd process: The process of taking out the molding formed in the electrical process from a mold, and curing it by the conventional steam curing or dry curing method.

Fourth step: After curing and dried molding in the electric process, install water-soluble acrylic resin, epoxy, urethane or unsaturated resin on the surface and infiltrate the pores and dry and cure according to the usual method. fair.

In the present invention, in the first step, aggregate, cement, water, water reducing agent, etc. are mixed by the mixing ratio of conventional permeable concrete using 13 to 4 mm aggregate, which will be described in detail. The cement is used in the range of 300 ~ 500kg according to the change of strength for 1㎥ of aggregate which passes 95 ~ 100% in 13mm sieve and 0 ~ 40% in # 4 sieve. As a guide, use it in the range of 25 to 40%, and reducer should be used in the range of 2% by weight of cement usage. After the mixture is introduced into the mold, vibration and pressurization may be performed according to a conventional method.

The second step is to mix fine-grained permeable concrete and put it on the permeable concrete of the electric process. In this process, silica sand (sand) that passes 100% in 5mm sieve and 10% or less in 1mm sieve passes the maximum compaction weight. For 1㎥ as a standard, cement is used in the range of 300 ~ 500kg according to the strength change, water is used in the range of 25 ~ 40% based on water-cement ratio, and water reducing agent is used within the range of 2% by weight of the cement usage. For coloring, inorganic pigments are used within 10% of the amount of cement used.

In addition, the mixture is introduced into the upper portion of the mixture of the mold in the appropriate amount, it is preferably added in about 5 ~ 20mm. What is necessary is just to vibrate and pressurize according to a conventional method after injection | throwing-in. The coarse pitcher concrete is put in the lower part of the mold and the fine particle permeable concrete is put in the upper part and pressurized. Reinforced and integrated.

In the third step, the molded article formed in the electrical process is separated from the mold, and steam cured or air cured at about 50 ° C. for about 10 hours according to a conventional curing method, and then dried at about 30 to 50 ° C. in a dry state to form internal voids. Allow 10 to 20% formation. In order to produce a molded article having a perfect shape and a clean surface, in removing the molded product from the mold, it is preferable to remove the pressure plate after lifting the edge of the mold upward while the pressure plate is pressed. At this time, it is preferable that the porosity is about 12%, the permeability coefficient is 10 × 10 ⁻² c / sec or more, and the flexural strength is 50 kg / cm 2 or more.

In the fourth step, after the molding cured in the electrical process is installed on-site, the resin can be sprayed on the surface of the molded article installed in the air condition, if necessary, for the purpose of whitening removal, pore protection, strength increase and color protection. As the resin to be sprayed onto the surface of the molded article, it is preferable to use epoxy, water-soluble acrylic, urethane resin or unsaturated resin. When spraying the resin onto the molding, the manufacturing process proceeds with the economic burden such as the establishment of a facility and a drying room, and the cost increase due to the complexity of the process. It is preferable to spray the resin in large quantities using a spray after the sunny weather.

Even if the resin of the water permeable block of the present invention is used without being sprayed, its strength, durability and water permeability are superior to those of the conventional block.

Hereinafter, the present invention will be described based on Examples.

EXAMPLE

About 30cm in width and length, 6cm in height, and red in color, respectively, a block was prepared, and the following processes were performed in sequence.

1) Figure 1 shows the process of the embodiment in the order of progress. As shown in FIG. 1, a mold having an internal dimension of 30 cm and a height of 30 cm and a height of 7.5 cm, respectively, was formed of a base 1 and a frame 2 and a pressing plate 3 suitable for the template.

2) Cement: 380kg, water: 95kg, high performance water sensitizer for aggregates passing 100% in a 19mm sieve, 95-100% in a 13mm sieve, and 0-40% in a # 4 sieve 3.8 kg were mixed and the mixture was introduced to reach the top of the mold (7.5 cm) to clear the surface, and the press plate 3 was covered with the upper part to pressurize it. The height after pressurization became 6.3 cm.

3) Cement: 400kg, water: 100kg, high-performance water reducing agent: 4kg, mineral pigment for coloring for 1m3 of silica sand (sand) that passes 100% in 5mm sieve and 10% or less in 1mm sieve. A mixture of 20 kg of red iron oxide was added to the mixture of the electric process to reach the top of the mold so that the total height was about 7.5 cm. After the addition, the surface was cleaned, vibrated, and pressed in a conventional manner so that the height was 6 cm. At this time, the height of the bottom permeable concrete layer was 5.1 cm and the height of the fine-grained permeable concrete layer was 0.9 cm.

4) In order to completely and cleanly separate the molding formed in the electrical process from the mold without being damaged, the pressing plate was removed by lifting the edge of the mold while the pressing plate was placed on the molding. And air curing was performed based on the normal curing method.

5) Install the molding cured in the electric process on-site by the usual way block installation method, mix the emulsion (water-soluble) acrylic with water so that it becomes 10% based on 50% of solid content, and spray it on the site-installed block to the inside. Allow to absorb and allow to dry sufficiently.

After all the process is completed, hayeotneun measuring the permeability, porosity and bending strength with respect to the high-pressure fine character pitching block of the upper bar, the permeability: 5x10 cm ^-1 / sec, void ratio: 14.5%, bending strength: excellent both as 61.5kg / ㎠ It was.

Blocks made by the present invention have a small surface porosity and the surface is smooth and beautiful in appearance, and foreign matters are not easily caught in the pores. It can be secured. In addition, the block of the present invention has high compressive strength and excellent durability, and can be used not only for sidewalks but also for roadways. In addition, since the block of the present invention can be easily colored in a variety of colors, it is said that the present invention contributes to the field in the use and value of the importance of the aesthetics of the city is emphasized today.

On the other hand, the present invention, when compared to the pitched concrete products directly placed on the site, it will be very useful in terms of being recyclable at the time of repair.

Claims (5)

Aggregate 100% passing through 19mm sieve, 95 ~ 100% passing through 13mm sieve, and 0-40% passing through # 4 sieve. Cement: 300 ~ 500kg, water: water-cement ratio 25 to 40%, water reducing agent: a step of putting the mixture of less than 2% by weight of the cement used in the mold of the block to clean the surface first and then pressurize; Cement: 300 ~ 500kg, water: water-cement ratio for 1m3 by aggregate maximum compaction weight which passes 100% in 5mm sieve and less than 10% in 1mm sieve on top of the first vibration pressurized mixture in the electric process 25 to 40% as a guide, reducing agent: adding a mixture of less than 2% by weight of the amount of cement to form a thin layer to form a thin layer after the second vibration pressing step; And separating the molded product formed in the electrical process from the mold and drying the mold according to a conventional steam curing or dry curing method. Fine grain high pressure water permeable block manufacturing method comprising a. The method of claim 1, wherein the surface of the dried molding is sprayed with at least one of epoxy, water-soluble acrylic, urethane or unsaturated resin to penetrate into the inner void of the surface thin layer, and then cured and dried according to a conventional method. Fine grain high pressure permeation block manufacturing method. The method of claim 1, wherein the inorganic pigment is added to the surface thin layer mixture within 10% of the amount of cement used. The bottom layer is formed of a conventional permeable concrete, and passes through 100% in a 5 mm sieve and 10% or less in a 1 mm sieve. For 1 m 3 of the maximum compaction weight standard, cement: 300 to 500 kg and water: water-cement ratio 25 ~ 40%, water-reducing agent: fine particles high-pressure water permeable block formed of a mixture of less than 2% by weight of cement, inorganic pigments: less than 10% of the amount of cement used. 5. The fine particle high-pressure water permeation block according to claim 4, wherein at least one of epoxy, water-soluble acrylic, urethane or unsaturated resin penetrates into the pores of the upper layer.