KR19980040554A - Fine grain high pressure permeation block manufacturing method - Google Patents

Abstract

The present invention relates to a method of manufacturing a block having excellent strength and permeability, and based on a common permeable concrete mixing ratio, a mixture of water, aggregate, cement, and a reducing agent is added to the mold of the block to clean the surface. Primary vibration or pressurization after; Putting a mixture of fine silica sand, cement, water, pigment, water reducing agent, and the like into a thin layer to form a thin layer on the top of the permeable concrete in the electrical process, followed by secondary vibration pressurization after surface cleaning; Separating the molded product formed in the electrical process from the mold to cure according to a conventional steam curing or dry curing method; And a step of spraying the resin on the surface of the cured and dried molding in the electrical process to infiltrate the voids, and then drying and curing according to a conventional method to complete the high-permeability high-pressure block. To provide a fine-grain high-pressure permeable block manufacturing method comprising a.

Description

Fine grain high pressure permeation block manufacturing method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a block used for sidewalks or roadways, and more particularly, to form a fine-grained permeable concrete layer on top of a 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 conventional high pressure blocks are used for sidewalks and driveways, it is common for the gaps between the blocks to be filled with an impermeable material, which is a mixture of sand, clay, cement and the like. As such, when a conventional high pressure block is used for sidewalks and roadways, the underground ecosystem is destroyed because rainwater cannot penetrate into the underground, and when the conventional high pressure block use area is wide, Local flooding of urban streams, groundwater depletion, and resulting ground deformation can occur in the region.

In order to solve such problems of the conventional block, there is a 'pattern porous panel manufacturing method' invented and patented by the present applicant (Patent Publication No. 96-11337). The panels (blocks) produced by this method are not only permeable but also very high in strength. However, since this method uses a relatively thick 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 off from 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 which mix | blends the mixture which mixed water, aggregate, cement, a water reducing agent, etc. in the mold of a block based on a normal permeable concrete mixing ratio, and vibrates or vibrates and pressurizes after surface cleaning.

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 13-4 mm aggregate, which will be described in detail. 1m3 is used as the maximum compaction level for the aggregate which passes 95 ~ 100% at 13mm and 0 ~ 40% at # 4, and cement is used in the range of 300 ~ 500kg per 1m3 of aggregate depending on the strength change. The cement ratio should be used in the range of 25 to 40%, and the reducing agent should be used in the range of 2% by weight of the cement usage. After the mixture is introduced into the mold, vibration and pressurization may be performed according to a conventional method.

The second process is to mix fine-grain permeable concrete and put it on the top of permeable concrete of the electric process. In this process, 1 m3 of silica sand (sand) that passes through 100% at 5mm and 10% or less at 1mm is passed. Cement is used in the range of 300 ~ 500kg per 1m3 of aggregate 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 in the range of 2% by weight of 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. By injecting coarse pitcher concrete into the lower part of the mold and injecting fine-grained permeable concrete into the upper part of the mold, fine-grained concrete gets stuck in the pores of the coarse two-concrete concrete to strengthen the adhesion between the layers and integrate.

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 cm / 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 molding 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 water permeable block of the present invention is used in a state in which no resin is 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, 6cm in height, 6cm in height and red in color were prepared, and the following processes were carried out in sequence.

One). 1 shows the process of this embodiment in the order of progress. As shown in Figure 1, the inner dimensions of the horizontal, vertical 30cm, height was 7.5cm, respectively, a frame consisting of a pedestal (1) and the rim (2) and a pressure plate (3) according to the frame was prepared.

2) Mix 100% at 19mm, 95 ~ 100% at 13mm, and 0 ~ 40% at # 4 at 1m3 with maximum compaction, cement: 380kg, water: 95kg, and high performance water reducing agent: 3.8kg Then, the mixture was introduced to reach the top of the mold (7.5 cm), the surface was cleaned up, and the press plate 3 was covered and pressurized to the upper portion. The height after pressurization became 6.3 cm.

3) 100 m at 5 mm and less than 10% at 1 mm at 3 mm, cement: 400 kg, water: 100 kg, high performance water reducing agent: 4 kg, red iron oxide as inorganic pigment for coloring: A mixture of 20 kg was added to the mixture of the above process to fill 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) acryl with water so that it becomes 10% based on 50% of solid content, and spray it on the block installed on-site to the inside. Allow sufficient absorption and then dry sufficiently.

After the process was completed, permeability coefficient, porosity and bending strength were measured for the fine grain high-pressure permeation block of the upper layer. It was.

Blocks made by the present invention have a small surface porosity and the surface is smooth so that the aesthetics are beautiful, and foreign substances 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 easily color a variety of colors, it is said that the present invention contributes to the field in the use and value of the present day when the importance of urban aesthetics is emphasized.

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 (7)

A step of subjecting the mixture of water, aggregate, cement, water reducing agent, etc., to the mold of the block based on a conventional water permeable concrete mixing ratio, to firstly vibrate and pressurize the surface; Putting a mixture of fine silica sand, cement, water, pigment, water reducing agent, and the like into a thin layer to form a thin layer on the top of the permeable concrete in the electrical process, followed by secondary vibration pressurization after surface cleaning; And Removing the molded product formed in the mold from the mold and drying the molded article 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 cured molding is sprayed with epoxy, water-soluble acrylic, urethane, or unsaturated resin, and then permeated into the pores, followed by drying and curing according to a conventional method to complete the permeable high pressure block. Fine grain high-pressure permeable block manufacturing method characterized in that. The method of claim 1, wherein the fine-grained aggregate is to pass 100% at 5mm and less than 10% at 1mm. The method of claim 1, wherein the mixing ratio of the mixture of the first process is 100% at 19mm, 95-100% at 13mm and 0-40% at aggregate # 4 using 1m3 as the maximum compaction standard. , Cement is used in the range of 300 ~ 500kg per 1m3 of aggregate 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 in the range of 2% by weight of cement usage. Fine grain high pressure permeable block manufacturing method. The method of claim 1, wherein the mixing ratio of the mixture of the second process is 1m3 on the basis of the compaction of aggregates passing from 100% at 5mm and less than 10% at 1mm, and cement is used per square meter of aggregate according to the change in strength. It is used in the range of 300 ~ 500kg, water is used in the range of 25 ~ 40% based on water-cement ratio, water reducing agent is used in the range of 2% by weight of cement usage, and inorganic pigment is in the range of 10% of cement usage. Pitcher high pressure block manufacturing method, characterized in that used in. The bottom layer is formed of a conventional permeable concrete, 1m3 is used as the basis of the maximum compaction of silica sand passing through 100% at 5mm and less than 10% at 1mm, cement is used in the range of 300 ~ 500kg per 1m3 of silica sand, water is water -Cement ratio is used in the range of 25 to 40%, water reducing agent is used within the range of 2% by weight of the cement usage, inorganic pigments are used within the range of 10% of the cement usage, mixed with fine-grain permeable concrete Fine-grained high-pressure water permeation block formed. The fine-grain high-pressure water-permeable block according to claim 6, wherein epoxy, water-soluble acrylic, urethane or unsaturated resin penetrates into the pores of the fine-grained water-permeable concrete layer and is dried and cured according to a conventional method.