KR100879618B1 - Fabrication method of a block - Google Patents

Abstract

A method of manufacturing block is provided to prevent shot ball from being stuck between air gaps of superficial layers according to proper superficial layer particle size when shortly blasting outer layer surface of block. A method of manufacturing block comprises steps of: mixing aggregate 80~200 parts by weight, water 20~50 parts by weight(a ratio of water/cement is 0.2~0.5) and blending material 100~800 parts by weight based on cement 100 parts by weight and manufacturing a first mixture; mixing the first mixture and inorganic pigment 0.5~10 parts by weight of the ferric oxide and chromium oxide based on cement 100 parts by weight and manufacturing a second compound; injecting the first mixture into a molder, injecting the second compound, vibrating and molding it and manufacturing formed block; curing the formed block; and shortly blasting the formed block.

Description

FABRICATION METHOD OF A BLOCK

The present invention relates to a block and a method of manufacturing the same, and more particularly, to prevent the shot ball from getting stuck between the pores of the surface layer according to the appropriate surface particle size during the short blasting of the surface layer of the block. The present invention relates to a block and a method of manufacturing the same, by which the white of the foamed styrofoam can be exposed to the surface, thereby improving the viewability of the block.

The permeable block constructed on the sidewalk or walkway has a void between the aggregate and the aggregate to permeate water due to rain and so on to delay or prevent water from entering the sidewalk, the walkway or urban rivers.

Recently, with increasing interest in permeable blocks, studies have been conducted to introduce various materials with various structures.

Korean Patent Laid-Open Publication No. 1998-71164 proposes an elastic permeable block that incorporates waste tires or waste rubber powder and aggregates to impart elasticity and strength, and is environmentally friendly and can reduce costs, while adding perfume capsules to the composition. Mention is made of permeable blocks that can have directionality.

Korean Patent Publication No. 19999-24066 proposes a block having a two-layer structure consisting of an upper elastic layer composed of a rubber chip, a polyurethane binder and a pigment, and a lower support layer composed of sand, a rubber and a polyurethane binder. The pigment is intended to make the color of the block beautiful, and it is generally mentioned that pigments used for coloring rubber or synthetic resin can be used.

In the case of the block using the pigment as described above, it has a visually excellent effect by implementing a variety of colors, to overcome some changes caused by the exposure of the cement to the climate.

However, due to climatic factors such as rain and snow, the intrinsic color is discolored with time, and there is a problem in that the usability is greatly deteriorated since the color is completely different from the intended color.

Therefore, a method of using an expensive pigment which is less decolorized has been proposed, but another problem has arisen in that the price of the permeable block is increased.

Republic of Korea Patent Publication No. 2002-18497 proposed a method of coating with an epoxy resin to prevent discoloration on the surface of the interlocking block. However, this method also led to an increase in the cost of block production with the addition of a process called coating of epoxy resin.

Korean Patent Application Nos. 2005-120591 and 2006-94935 disclose that interlocking permeable blocks can be used to realize various colors using pigments. However, these patents only mention the use of pigments, but do not mention any specific composition.

In order to solve the above problems, Korean Patent Registration No. 788633, which has been filed and registered by the applicant, limits the content of admixtures and inorganic pigments to increase the strength of the permeable block and increase the coefficient of permeability, as well as various colors. A permeable block that can be implemented and a method of manufacturing the same have been proposed.

However, the conventional water permeable block has a surface layer size of 4.0 to 8.0 mm in order to ensure a permeability function, and in the case of a permeable block having such a surface layer size, it is put into a shot blasting machine for post-processing on the surface layer. If so, after the shot ball is sprayed there is a problem that the iron ball may come out between the aggregate during the rainfall due to the short ball stuck between the surface aggregate voids. Moreover, even after finishing, additional work was needed to remove the shortball from the voids.

In addition, when the particle size of the sand is used to reduce the aggregate size of the block, rainwater does not penetrate into the surface due to water film phenomenon during the rainfall, which may adversely affect ecological aspects such as groundwater exhaustion and heat islanding. .

In order to solve the above problems, the present invention uses a silica sand aggregate having a particle size of 0.6 to 2.5 mm as the surface aggregate of the block, and after the surface layer of the cured block is shot blasted, the shot is shorted at the time of post shot blasting. It is an object of the present invention to provide a block and a method of manufacturing the same, which can prevent the ball from being stuck between the pores of the surface layer.

In addition, by using the foamed styrofoam as the surface aggregate of the block, another object of the present invention is to provide a block and a method for manufacturing the block that can enhance the viewability of the block by allowing the white surface of the foamed styrofoam to be exposed to the surface during the shot blasting.

Method for producing a block according to the present invention for achieving the above object is a) 80 to 200 parts by weight of aggregate, 20 to 50 parts by weight of water (water / cement ratio of 0.2 to 0.5), and admixture 100 with respect to 100 parts by weight of cement Preparing a secondary mixture by mixing ˜800 parts by weight, and mixing 0.5-10 parts by weight of the iron oxide and chromium oxide-based inorganic pigments with respect to the primary mixture and 100 parts by weight of cement;

b) injecting the primary mixture into a molding machine, and injecting the secondary mixture into the molding machine, followed by vibration molding, to form a molding block; And

c) curing the forming block;

And d) a post-processing step of short blasting the cured molding block after step c).

Preferably, the aggregate is characterized in that it comprises at least one selected from the group consisting of gravel, sand, steel slag aggregate, waste glass aggregate, silica sand aggregate, foamed styrofoam and mixtures thereof.

More preferably, the silica sand aggregate is characterized in that using a particle size of 0.6 to 2.5mm.

On the other hand, the present invention provides a block produced by the above method.

According to the block and the manufacturing method thereof according to the present invention as described above, there is an effect that the shot ball is prevented from getting stuck between the pores of the surface layer according to the appropriate surface layer size during the short blast post-processing.

In addition, by using the foamed styrofoam as the surface aggregate of the block, the white of the foamed styrofoam can be exposed to the surface during the shot blasting, thereby improving the viewability of the block.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the block according to an embodiment of the present invention and a manufacturing method thereof.

The manufacturing of the block according to the present invention will be described at each step.

First, in step a), a primary mixture is prepared by mixing cement, water, aggregate, and admixture, and a secondary mixture is prepared by mixing cement, water, aggregate, admixture, and inorganic pigments of iron oxide and chromium oxide.

In this case, the primary mixture is a mixture for forming a base layer of a water permeable or impermeable block, and the secondary mixture is a mixture for forming a surface layer showing color.

The primary mixture uses 80 to 200 parts by weight of aggregate, 20 to 50 parts by weight of water (water to cement ratio of 0.2 to 0.5), and 100 to 800 parts by weight of admixture based on 100 parts by weight of cement, and the secondary mixture is used as the primary mixture. It is prepared by further adding 0.5-10 parts by weight of an inorganic pigment to 100 parts by weight of cement in the composition range of.

The cement may be one selected from the group consisting of blast furnace slag cement, rough steel cement, white cement, portland cement, crude steel cement, fast cement, and mixtures thereof, and preferably white cement is used.

The purity of the color depends on the addition of the inorganic pigment, but the brighter the color of the concrete to be colored, because the color of the block is different when gray portland cement and white white cement are used when the same pigment is used. Color can be implemented. In addition, when a non-white cement such as Portland cement is used, titanium oxide is added as a pigment.

The aggregate may be one selected from the group consisting of gravel, sand, steel slag aggregate, waste glass aggregate, silica sand aggregate, foamed styrofoam and mixtures thereof.

The mixed use of the aggregate is selected in consideration of the effects of the recycled side of the aggregate and the aggregate cross-section color, texture, etc. when polishing the surface of the product. As an example, the dolomite aggregate after polishing has a color such as white, red or gray. Here, the silica sand aggregate preferably uses a particle size of 0.6 to 2.5 mm.

When the foamed styrofoam is used as the aggregate, the white (white) portion of the foamed styrofoam is partially exposed to the outside at the time of the short blasting, which will be described later, so that it may give a natural beauty such as natural stone in appearance.

In addition, the aggregate is preferably used in the case of a permeable base material of the particle size of 7.0 ~ 10.0 mm, in the case of an impervious base, it is preferable to use an impermeable layer aggregate.

On the other hand, in the case of a permeable surface layer, the aggregate is used by mixing a particle having a different size of 2 to 15 mm, preferably 2 to 7 mm and 7 to 15 mm, thereby providing sufficient void and strength to the block. do. In addition, when vegetation is planted, the roots of the plant can be easily settled into the soil beneath the block by passing between the pores of the completed porous concrete block.

These aggregates and cements are selected in consideration of the porosity, weight, feeling of compression of concrete blocks so that the blocks can be maintained at a constant weight so as not to be drift due to heavy rain or rapids when they are installed on shores such as river shores.

In the block according to the present invention, the aggregate is used in the range of 80 to 200 parts by weight, preferably 100 to 150 parts by weight, based on 100 parts by weight of cement. If the content of the aggregate is out of the above range because the physical properties of the block may be lowered, it is appropriately used within the above range.

The water is used to uniformly mix cement, aggregate, and inorganic pigment, and is used in an amount of 20 to 50 parts by weight based on 100 parts by weight of cement. If the water content is out of the above range, there is a possibility that the physical properties of the block, etc. are lowered, so it is appropriately used within the above range.

The admixture is used to increase the strength as well as improve the viewability of the block by exerting high dispersion and wetting action on the cement particles. These admixtures improve the filling rate by improving the unit volume mass, and at the same time significantly reduce the absorption rate by the water repellent action and suppress the ingress of water inside the block.

The admixture is not particularly limited in the present invention, and chemical admixtures commonly used in the art may be used.

The chemical admixture includes an air entrainer (AE agent); Naphthalin sulfonic acid formalin condensate (PNS) and melamine sulfonic acid formalin condensate (PMS) -based high-performance AE reducing agents, polycarboxylic acid-based high-performance AE reducing agents, and the like are used.

In this invention, 100-800 weight part of admixtures are used with respect to 100 weight part of cement. If the content of the admixture is out of the range can not be obtained the effect as described above, it is used properly within the above range.

The admixture is used by mixing with water or directly added to the mixer and mixed with other compositions. However, it is preferable to avoid mixing directly with cement at this time.

On the other hand, in the case of blocks, the lower the ratio of water / cement, the higher the strength. In this case, increasing the content of the inorganic pigment to the cement absorbs the moisture to be used for curing the cement, the ratio of water / cement is actually reduced, thereby increasing the strength of the block. On the other hand, increasing the concentration of inorganic pigments requires extra water to maintain the same viscosity of the cement mixture (constant slump). This means an increase in the ratio of water / cement and has a negative effect on strength. Therefore, the effect of the inorganic pigment content is very small up to 10 parts by weight with respect to 100 parts by weight of cement, and when the content exceeds 10 parts by weight, the effect is large, which greatly affects the strength.

The properties of the inorganic pigments used for coloring the blocks are in the tinting strength and color strength of the pigments. This property depends on the purity and particle size of the inorganic pigment, meaning that the visually darker reddish powder red pigment is not always strong in coloration. In addition, as the amount of the inorganic pigment is increased, the intensity of the color increases, but since it is saturated to some extent, the contrast is no longer deepened even if more pigments are added. This means that the content control of the inorganic pigment is necessary to show the intensity of the color required to some extent.

In this case, since the content of the inorganic pigment greatly affects the strength of the block as described above, the selection of the content of the inorganic pigment should consider not only the strength of the color but also the strength of the block. In other words, inorganic pigments with the highest possible color power should be used as a means to obtain the maximum color from the use of a minimum of inorganic pigments in order not to inappropriately increase the mixture of fine particles affecting the strength of the block. If an inorganic pigment with low coloring power is used, an excessive amount of inorganic pigment must be added, which causes problems in block strength.

In the present invention, an inorganic pigment is used in an amount of 0.5 to 10 parts by weight, preferably 2 to 6 parts by weight, based on 100 parts by weight of cement so as to sufficiently exhibit color without affecting the strength of the block. At this time, if the content of the inorganic pigment is out of the range it is difficult to implement the strength or color of the block, it is preferable to use within the above range.

Such inorganic pigments may be pigments known in the art, but preferably, iron oxide and chromium oxide-based inorganic pigments with strong coloring power, and have a relative tinting strength (test according to EN12878) of 95 to 105%. Use it.

The iron oxide-based inorganic pigments include Bayferrox 130C (Red), 318 (Yellow), 330C (Black), 420 (Yellow), 920G (Yellow), 965C (Yellow), and the like. oxide green (Green) is possible.

These inorganic pigment particles have a size of 10 to 20 times that of cement particles, the size and shape of these particles affects workability in the manufacture of blocks.

The inorganic pigment particles proposed in the present invention have a needle shaped structure to allow absorption of a lot of water on the surface. In this case, since the water / cement content is directly related to the strength of the block, a limitation on the size of the inorganic pigment particles is required in order not to affect the strength. Preferably, the inorganic pigment according to the present invention uses a particle size of 75-3000 μm.

According to the use of the inorganic pigment it is possible to implement a variety of colors desired by the consumer. For example, blue, green, yellow, sepia, silver, orange, pink, crimson, purple, Prussian blow, violet, cobalt blue, sky blue, brown, black, grey, and white.

At this time, various additives are possible as needed. Such additives include glidants, waterproofing agents, reinforcing agents, rust inhibitors and the like.

The glidant is used to increase the fluidity of the mixture.

The waterproofing agent is used for the purpose of reducing the water absorption or permeability of the concrete, and minerals such as calcium chloride, sodium silicate, siliceous powder, oils such as fatty acids, metal soaps, paraffin, asphalt, resin oils, water soluble oils, rubber Organic waterproofing agents such as emulsions are used.

The reinforcing agent is to increase the strength of the block, there are inorganic fibers, organic fibers, scrap, high elastic rubber steel fibers, glass fibers, carbon fibers, etc., and the type of organic fibers are aramid fibers, polypropylene fibers, vinylon fibers, nylon, etc. Used.

The rust preventive agent is used to prevent the salt from being absorbed into the concrete and rusting in the reinforcing steel when it is used for concrete or when it comes into contact with water or soil containing salt.

The content of the additive is used within a conventionally used range that does not harm the physical properties such as strength, dry shrinkage and durability of the block, for example, about 1 to 5 parts by weight based on 100 parts by weight of cement.

Next, in step b), the primary mixture is injected into a molding machine, and the secondary mixture is injected therein, followed by vibration molding to prepare a molding block.

At this time, the thickness of the block is not particularly limited because it can be appropriately determined according to the need, for example, it is preferable to comply with the standard of the block for block diagram of the Korea Industrial Standard (KS).

The molding may be any molding apparatus that is commonly used, and the molding apparatus may be a vibrating molding apparatus that applies vibration and pressure to the molding die. In this case, various shapes of blocks are manufactured according to the shape of the mold.

Next, in step c) to produce a block to be manufactured through the step of curing the molding block.

The curing is carried out by steam curing or air curing at 10 to 80 ° C., preferably at 20 to 40 ° C. for 2 to 4 hours, and then drying at 30 to 50 ° C.

At this time, the curing temperature affects the color of the block. As the curing temperature is higher, the color intensity is lower than curing at low steam pressure or in the air, and curing is performed within the above range in order to realize an optimal color.

Next, in step d), the cured molding block is shot blasted, and when the molding block is put into the shot blasting machine combo (not shown), the stainless short ball SB12 is placed in the mechanical comb. Is sprayed to polish the surface layer of the block.

Through this short blasting process, cement, silica sand, and copper slad on the surface of the concrete block are exposed or partially removed by the shot ball to prevent whitening of the block and to process the surface of the dirty block. The commerciality of the block can be improved.

In addition, a rough texture and granite texture can be expressed on the surface of the block, and slippage by a smooth block surface can be prevented.

At this time, the surface polisher may be further used to increase the surface properties of the block before polishing. In this case, a sealer coating may be used as the surface polisher, and the sealer coating agent is coated to improve abrasion resistance and strength of the block, so as to exhibit optimal landscaping properties such as suppressing whitening of colored areas of the finish layer and enhancing gloss. It is effective. The sealer coating agent is preferably to use a UV gloss sealer coating that is mainly used in the finishing process of color concrete paving.

Blocks manufactured through the above steps are packaged, and after being cured before shipment, are loaded and shipped to the consumer.

The block according to the present invention manufactured through the above steps is not only excellent in permeability and strength, but also in various colors. In addition, its high permeability makes it applicable to various fields such as sidewalks, bicycle paths, buildings, walkways, parking lots, small roads, and interior structures.

In addition, when sowing grass, grass seeds, or seeds of small trees during block construction, vegetation takes place on all exposed surfaces such as the top and sides of the block as needed, which can greatly contribute to the preservation of the ecosystem. It can be useful as a block.

In addition, by using short sandblasting on the surface of the block by using silica sand having an appropriate particle size as the surface aggregate of the block, the short ball can be prevented from getting stuck between the pores of the surface layer during post-processing, and the whitening phenomenon of the block is prevented. By preventing and processing the surface layer of the soiled block, it is possible to increase the commerciality and the beauty of the block.

Claims (4)

a) preparing a primary mixture by mixing 80 to 200 parts by weight of aggregate, 20 to 50 parts by weight of water (water / cement ratio of 0.2 to 0.5), and 100 to 800 parts by weight of admixture with respect to 100 parts by weight of cement; Preparing a secondary mixture by mixing 0.5 to 10 parts by weight of iron oxide and chromium oxide inorganic pigment with respect to 100 parts by weight of cement; b) injecting the primary mixture into a molding machine, and injecting the secondary mixture into the molding machine, followed by vibration molding, to form a molding block; And c) curing the forming block; And d) a post-processing step of short blasting the cured molding block after step c). The method of claim 1, The aggregate is a method of producing a block, characterized in that it comprises at least one selected from the group consisting of gravel, sand, steel slag aggregate, silica sand aggregate, waste glass aggregate, foamed styrofoam and mixtures thereof. The method of claim 2, The silica sand aggregate is a method of producing a block that uses a particle size of 0.6 to 2.5 mm. delete