KR101875457B1 - Eco-friendly concrete wall block and construction method of concrete wall therewith - Google Patents

Abstract

The present invention relates to an environmentally-friendly concrete bock composition, and an environmentally-friendly concrete retaining wall construction method and a construction method using the same. According to the present invention, the environmentally-friendly concrete bock composition comprises: 5 to 45 weight percent of a perform improvement combiner; 15 to 65 weight percent of fine aggregate; 20 to 70 weight percent of coarse aggregate; and 0.1 to 20 weight percent of water. The performance improvement binder comprises: 30 to 95 weight percent of blast furnace slag cement; 1 to 30 weight percent of kaolinite; 1 to 20 weight percent of phyllite powder; 1 to 20 weight percent of metakaolin; 0.1 to 20 weight percent of alumina cement; 0.01 to 10 weight percent of perlite; 0.01 to 10 weight percent of bentonite; 0.01 to 10 weight percent of waste silicon water sludge; 0.01 to 10 weight percent of hydrophilic fiber; 0.01 to 10 weight percent of polystyrene acrylic ester; 0.01 to 10 weight percent of isoprene-isobutylene copolymer; 0.01 to 10 weight percent of ethylene methyl-acrylate copolymer; 0.01 to 5 weight percent of a defoamer; and 0.01 to 5 weight percent of a water reducing agent. Accordingly, strength and durability, in particular, excellent durability are provided to prevent corrosion of concrete due to erosion, thereby providing an effect of remarkably reducing maintenance costs. Moreover, provided is an effect of improving durability, such as whitening prevention, weather resistance, salt resistance, pollution resistance, neutralization resistance, ultraviolet resistance, and the like. Moreover, the retaining wall block is tensioned and fixed on a slanted surface by using a fixing wire, a rebar is inserted into a connection hole vertically penetrated through retaining walls and is tensioned, and a grout member is injected therein, thereby providing an effect of reinforcing shearing force and freely increasing a construction height in accordance with a site condition.

Description

TECHNICAL FIELD [0001] The present invention relates to an eco-friendly concrete retaining wall block and an eco-friendly concrete retaining wall construction method using the eco-

The present invention relates to an eco-friendly concrete retaining wall block composition having improved strength and durability, which is excellent in bonding force, has improved chemical resistance, weatherability and durability, can prevent whitening, To provide an eco-friendly concrete retaining wall block composition having improved weatherability and durability, and a method of manufacturing an eco-friendly concrete retaining wall block and a method of constructing a concrete retaining wall block.

Generally, various methods including concrete panel method, block axis method, method of constructing horizontal or vertical surface of metal front plate, steel frame vegetation reinforced earth retaining wall method using wire net, etc. have been developed and used in general.

The retaining wall comprises a block made of concrete, masonry, brick or stone, a gravel filled on the rear side of the block, and an appropriate anchor means. The block serves to prevent the soil from being pushed forward. It is generally known that a retaining wall constructed by retaining wall blocks is constructed by stacking blocks several times in a transverse direction, and then filling the back surface with reinforcing soil including soil and crushed stone.

When a retaining wall is constructed using a conventional concrete panel or block, in the structural aspect, each panel or block is interlocked with each other, so that the entire retaining wall forms a single rigid body. Therefore, In case of concentrating locally, there is a problem that each panel or block is opened and the soil is escaped or cracks occur. In case of extreme case, there is a problem that the retaining wall is destroyed, and there is a problem of weathering due to seasonal change and period There is a problem that the structural strength is lowered and the concrete surface of the panel or the block is not in harmony with the surrounding environment and the visibility is very poor.

On the other hand, the concrete retaining wall block made of concrete has disadvantages in that the concrete can not exert its original function and deteriorate its properties over time due to neutralization, salt corrosion, frost damage, chemical erosion, alkali aggregate reaction, fatigue and weathering.

Korean Patent No. 10-1276291 (issued on June 24, 2013) Korean Registered Patent No. 10-1247608 (issued on April 02, 2013)

A problem to be solved by the present invention is to use a performance improving binder having strength and durability to improve the above problems and to provide an excellent strength and durability to prevent corrosion of concrete due to chemical erosion due to atmospheric conditions, The present invention provides an eco-friendly concrete retaining wall block composition having improved strength and durability, and a method of manufacturing an eco-friendly concrete retaining wall block and a method of constructing a concrete retaining wall block.

In order to achieve the above-mentioned object, the eco-friendly concrete retaining wall block composition comprises 5 to 45% by weight of performance improving binder, 15 to 65% by weight of fine aggregate, 20 to 70% by weight of coarse aggregate and 0.1 to 20% Wherein the performance improving binder comprises 30 to 95% by weight of blast furnace slag cement, 1 to 30% by weight of kaolinite, 1 to 20% by weight of feldspar powder, 1 to 20% by weight of meta kaolin, 0.1 to 20% by weight of alumina cement, 0.01 0.01 to 10 wt% of bentonite, 0.01 to 10 wt% of bentonite, 0.01 to 10 wt% of silicon wafer waste sludge, 0.01 to 10 wt% of hydrophilic fiber, 0.01 to 10 wt% of polystyrene acrylic ester, 0.01 to 10 wt% of isoprene- 0.01 to 10% by weight of an ethylene methyl acrylate copolymer, 0.01 to 5% by weight of a defoaming agent, and 0.01 to 5% by weight of a water reducing agent.

As the fine aggregate, sand or crushed sand having a particle diameter of 5 mm or less is used. The fine aggregate is preferably contained in an amount of 15 to 65% by weight based on the eco-friendly concrete retaining wall block composition.

The coarse aggregate is an aggregate having a particle size of 25 mm or less and an aggregate having a larger particle size than the fine aggregate. The coarse aggregate used recycled aggregate to recycle industrial byproducts. The coarse aggregate is preferably contained in an amount of 20 to 70% by weight based on the eco-friendly concrete retaining wall block composition.

According to another aspect of the present invention, there is provided a method of manufacturing a metal mold, comprising the steps of: assembling a casting mold having a fixing hole for fixing a wire on an inclined surface, The present invention relates to a method for constructing an eco-friendly concrete retaining wall block composition, comprising the steps of: pouring an environmentally-friendly concrete retaining wall block composition so that it can be manufactured in a wet and dry manner by adjusting a water-cement ratio; And forming a block by surface-finishing and vapor-curing the molded product, thereby providing an eco-friendly concrete retaining wall block manufacturing method.

In addition, the method of constructing the environmentally-friendly concrete retaining wall block according to the present invention comprises the steps of: setting the floor at the installation point of the concrete retaining wall block, flattening the floor, forming a retaining wall block using the retaining wall block, A step of connecting a fixed wire to a fixed end of a sloping surface, a step of forming a two-layered block of a retaining wall by laminating a retaining wall block on the top of the one of the retaining wall blocks, A step of forming a three-layer block, connecting a fixing wire to a fixing groove and fixing the fixing wire to a fixed end of the inclined surface, and repeating the step of installing the retaining wall block and the wire on the inclined surface, A method of constructing a concrete retaining wall block comprising filling a lump of concrete with concrete, the method comprising the steps of: Through the connection through-hole and down it characterized in that it comprises the step of inserting the reinforced and injected with non-shrink grout material after tense.

The present invention provides an eco-friendly concrete retaining wall block having a form having a shear key and a shear key groove for improving workability and horizontal force, and a vertically penetrating connecting hole formed by the manufacturing method of the eco-concrete concrete retaining wall block described above do.

Further, the present invention provides a method of manufacturing a concrete concrete retaining wall block, which is manufactured by the above-described method of manufacturing an environmentally-friendly concrete retaining wall block and includes a fixing groove in which a fixing wire can be connected to an inclined surface for improving conduction and shearing force, The present invention provides an eco-friendly concrete retaining wall block having a pin-groove shape.

In addition, the method of constructing the environmentally-friendly concrete retaining wall block according to the present invention includes steps of forming a floor at a place where the concrete retaining wall block is installed, forming a floor by using the retaining wall block, Connecting a fixed wire to a fixed end of a slope and connecting the fixed wire to the fixed end of the slope; stacking a retaining wall block on the upper part of the retaining wall block to form a two-layer retaining wall block; A step of connecting a fixed wire to a fixing groove and fixing the fixed wire to a fixed end of an inclined surface after forming the three layers of the retaining wall block, and the step of installing the retaining wall block and the wire on the inclined surface, The method comprising the steps of: (a) placing a block at a height of 1/5 to 3/5 of the total height of the block, And inserting the reinforcing bars through the connection holes vertically penetrating the reinforcing bars and injecting the non-shrinking grout material after straining.

According to the present invention, by adding a performance improving binder to a concrete retaining wall block composition, it is possible to prevent corrosion of concrete due to erosion due to excellent strength and durability, particularly water resistance, so that the maintenance cost to be used can be remarkably reduced . Further, it is possible to obtain an effect of improving durability such as prevention of whitening, weather resistance, flame retardancy, stain resistance, neutralization resistance, ultraviolet resistance and the like.

Further, according to the construction method of the present invention, the retaining wall block is fixed on the inclined surface by using a fixed wire, and the retaining wall block is vertically inserted into the connecting hole, And at the same time, it is possible to freely increase the height of the construction according to the site conditions.

1 is a schematic perspective view illustrating a structure of an environmentally-friendly concrete retaining wall block according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an eco-friendly concrete retaining wall block.
3 is a schematic side cross-sectional view illustrating the construction of an environmentally-friendly concrete retaining wall block according to an embodiment of the present invention.
4 is a schematic perspective view illustrating the structure of an environmentally friendly concrete retaining wall block according to another embodiment of the present invention.
5 is a schematic side cross-sectional view illustrating the construction of an environmentally friendly concrete retaining wall block according to another embodiment of the present invention.
6 to 10 are schematic views illustrating a structure of an environmentally-friendly concrete retaining wall block and a retaining wall structure using the same according to another embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, it should be understood that the following embodiments are provided so that those skilled in the art can understand the present invention without departing from the scope and spirit of the present invention. It is not.

The eco-friendly concrete retaining wall block composition according to a preferred embodiment of the present invention comprises 5 to 45% by weight of performance improving binder, 15 to 65% by weight of fine aggregate, 20 to 70% by weight of coarse aggregate and 0.1 to 20% by weight of water.

As the fine aggregate, sand or fine sand (crushed sand) having a particle diameter of 5 mm or less is used. The fine aggregate is preferably contained in an amount of 15 to 65% by weight based on the eco-friendly concrete retaining wall block composition.

The coarse aggregate is an aggregate having a particle size of 25 mm or less and an aggregate having a larger particle size than the fine aggregate. The coarse aggregate used recycled aggregate to recycle industrial byproducts. The coarse aggregate is preferably contained in an amount of 20 to 70% by weight based on the eco-friendly concrete retaining wall block composition.

Wherein the performance improving binder comprises 30 to 95% by weight of blast furnace slag cement, 1 to 30% by weight of kaolinite, 1 to 20% by weight of feldspar powder, 1 to 20% by weight of meta kaolin, 0.1 to 20% by weight of alumina cement, 0.01 to 10 wt% of bentonite, 0.01 to 10 wt% of silicon wafer waste sludge, 0.01 to 10 wt% of hydrophilic fiber, 0.01 to 10 wt% of polystyrene acrylic ester, 0.01 to 10 wt% of isoprene- 0.01 to 10% by weight of methyl acrylate copolymer, 0.01 to 5% by weight of defoamer, and 0.01 to 5% by weight of water reducing agent.

The blast furnace slag cement is preferably the one specified in KS. The blast furnace slag cement is preferably contained in an amount of 30 to 95% by weight based on the performance improving binder. When the content of the blast furnace slag cement is less than 30 wt%, the effect of improving the long-term strength and durability is deteriorated. When the blast furnace slag cement content exceeds 95 wt%, the neutralization resistance and drying shrinkage may be increased.

The kaolinite has a pozzolanic characteristic and is used for the development of long-term strength and durability, and also contributes greatly to the reduction of carbon dioxide. The kaolinite is preferably contained in an amount of 1 to 30% by weight based on the performance improving binder. If the content of kaolinite is less than 1% by weight, the performance improvement effect may be insufficient. When the content of kaolinite exceeds 30% by weight, good physical properties may be obtained. However, I can not.

The cemented carbide powder has a pozzolanic characteristic and is used for improving long-term strength and durability. In particular, SiO2 contained in cementite powder reacts with Ca of cement to produce calcium silicate, and has an index and self-healing ability. The cemented carbide powder is preferably contained in an amount of 1 to 20% by weight based on the performance improving binder. If the content of the cyanide powder exceeds 20% by weight, the index and self-healing properties are improved but the strength is easily lowered. If the content is less than 1% by weight, the performance improving effect is deteriorated.

The metakaolin is used for improving pozzolanic characteristics, long-term strength development and durability. When the weight ratio of meta-kaolin is increased, initial strength is lowered, but long-term strength development and durability are increased. The meta kaolin is preferably contained in an amount of 1 to 20% by weight based on the performance improving binder. If the content of the meta-kaolin exceeds 20 wt%, the performance is improved but the initial strength development is deteriorated. If the content is less than 1 wt%, the performance improvement effect is insufficient.

 The alumina cement is generally stabilized after about 1 to 3 days of production of the ettringite hydrate which is produced when the Portland cement is contacted with the Portland cement. Therefore, when a small amount of the alumina cement is added to the Portland cement, the shrinkage of the cement- And prevent cracks and durability deterioration caused by the self-shrinkage and drying shrinkage. The alumina cement is preferably contained in an amount of 0.1 to 20% by weight based on the performance improving binder. As the weight ratio of the alumina cement increases, rapid curing properties are exhibited. When the content is less than 0.1 wt%, the effect of suppressing the occurrence of strength and cracking is insignificant. When the content is more than 20 wt% But it is not economical because the manufacturing cost is high.

The perlite is used to improve the workability and flame retardancy of the composition. The content of the perlite is preferably 0.01 to 10% by weight based on the performance improving binder. If the content of the perlite is less than 0.01% by weight, the performance improvement effect may be insufficient. If the content of the perlite exceeds 10% by weight, the workability and strength are lowered and the manufacturing cost is increased.

The bentonite is used to prevent material separation. The bentonite is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving binder. If the content of bentonite is less than 0.01 wt%, the effect of preventing material separation is insufficient. If the content of bentonite is more than 10 wt%, viscosity increases and workability is lowered.

The silicon wafer waste sludge is used for promoting pozzolanic properties and initial reactivity to improve initial strength and durability, and initial strength and durability are improved when the weight ratio is increased. The silicon wafer waste sludge is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving binder. If the content of the silicon wafer waste sludge is less than 0.01% by weight, the initial reactivity of the composition may be lowered and the initial strength development and durability improving effect may be deteriorated. If the content of the silicon wafer waste sludge exceeds 10% by weight The initial strength and durability of the composition are improved but the heat of hydration is increased and over expansion is a concern.

The hydrophilic fiber is used for improving shrinkage reduction and flexural toughness. As the hydrophilic fiber, it is preferable to mix at least one of nylon, PP fiber and PE fiber. If the content of the hydrophilic fiber is less than 0.01% by weight, the effect of improving the performance of the composition may deteriorate. If the content of the hydrophilic fiber exceeds 10% by weight, the workability of the composition deteriorates.

The polystyrene acrylic ester has an effect of improving the water resistance of the composition. If the content of the polystyrene acrylic ester exceeds 10% by weight, the performance of the cement concrete composition may be improved but the price competitiveness may be deteriorated. If the content of the polystyrene acrylic ester is less than 0.01% by weight, the workability of the composition is improved but the water resistance may be lowered.

The isoprene-isobutylene copolymer is added to improve tensile strength, weather resistance, ozone resistance and chemical resistance. The isoprene-isobutylene copolymer is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving binder. When the content of the isoprene-isobutylene copolymer is less than 0.01% by weight, the effect of improving tensile strength, weatherability, and chemical resistance is insufficient. When the content is more than 10% by weight, viscosity increases and workability is lowered.

The ethylene methyl acrylate copolymer is used for improving strength and durability. The ethylene methyl acrylate copolymer is preferably contained in an amount of 0.01 to 10% by weight based on the performance improving binder. When the content of the ethylene methyl acrylate copolymer is less than 0.01% by weight, the effect of improving the strength and durability is insufficient. When the content exceeds 10% by weight, the viscosity increases and the workability is lowered.

The antifoaming agent is added to reduce an increase in the amount of air due to the generation of entrained air of the composition. The antifoaming agent may be used alone or in combination with other antifoaming agents such as an alcohol type antifoaming agent, a silicone type antifoaming agent, a fatty acid type antifoaming agent, an oil type antifoaming agent, an ester type antifoaming agent, But the present invention is not limited thereto, and a species conventionally used in the art may be used. Examples of the silicone defoaming agent include dimethyl silicone oil, polyorganosiloxane, and fluorosilicone oil. Examples of the fatty acid defoaming agent include stearic acid and oleic acid. As the oil defoamer, kerosene, animal or plant oil, castor oil, etc. may be used. As the ester type antifoaming agent, solitol trioleate, glycerol monoricinolate and the like can be used. Examples of the oxyalkylene antifoaming agents include polyoxyalkylene, acetylene ethers, polyoxyalkylene dihalogen esters, polyoxyalkylene alkylamines, and the like. As the alcohol defoaming agent, glycol or the like may be used. The antifoaming agent is preferably contained in an amount of 0.01 to 5% by weight based on the performance improving binder.

The water reducing agent reduces the water-cement ratio of the cement concrete composition to improve strength and durability, and has a fluidity to produce a dense cement concrete composition. Examples of the water reducing agent include polycarboxylic acid type, melamine type, naphthalene type and the like. The melamine type or naphthalene type water reducing agent is less effective for improving the strength and durability than the polycarboxylic acid type water reducing agent, and the water- , There is a disadvantage in that the miscibility with the polymer is poor. Therefore, it is preferable to use a polycarboxylic acid-based water reducing agent in the composition for the granular eco-friendly reinforcing soil block according to the present invention. The water reducing agent is preferably contained in an amount of 0.01 to 5% by weight based on the performance improving binder.

The green concrete retaining wall block composition is prepared by mixing 5 to 45% by weight of the performance improving binder, 15 to 65% by weight of fine aggregate and 20 to 70% by weight of coarse aggregate with a forced mixer for 1 to 3 minutes, Can be further mixed and re-crosslinked with a forced mixer for 1 to 5 minutes.

The present invention also relates to a fixing device for a motor vehicle, which comprises a shear key and a shear key groove for improving workability and horizontal force, an upper and lower end bolt connecting holes for improving a shear force by pulling a bolt vertically, Assembling the pouring mold having the pouring mold part formed therein; placing the eco-friendly concrete retaining wall block composition on the assembled mold form so that the water-cement ratio can be adjusted by wet and dry processes; Vibrating or compressing the retaining wall block composition; And forming a block by surface-finishing and vapor-curing the molded product, thereby providing an eco-friendly concrete retaining wall block manufacturing method.

The eco-friendly concrete retaining wall block manufactured according to the present invention and the retaining walls constructed using the same are illustrated in Figs. 1 to 10.

In the embodiment illustrated in Figs. 1 to 3, the retaining wall block 10 has a block body 11 in a generally rectangular parallelepiped shape. A protrusion 16 is formed on the upper surface of the block body 11 and a concave portion 16a is formed on the lower surface of the block body 11 at a position corresponding to the position of the protrusion 16 of the upper surface. As shown in Fig. 3, the protrusions 16a corresponding to the protrusions 16 are aligned with the protrusions and recesses formed on the block bodies adjacent to each other in the upper and lower retaining walls, It is possible to obtain an effect that the frictional force is increased in the horizontal direction between a plurality of block bodies stacked in a plurality of layers by engaging the protruding portions of the blocks with the concave portions of the other blocks. A keyway (14) is formed on one side or both sides of the block body (11).

On the other hand, pin grooves 12 are formed on both side edges of the upper surface of the block body 11 to fix the adjacent block bodies to each other using the connecting pin 20. [ An example in which two adjacent blocks 10 are fixed to each other by inserting the connecting pin 20 into the pin groove 12 is illustrated in Fig.

Further, a fixing groove 15 for fixing one end of the fixing wire 30 is formed on the rear surface of the block body 11. In the illustrated example, the fixing groove 15 has an open top and a shape of a wider width of the inner space than an entrance width of the rear side of the block body 11. [ The fastening plate 32 having a width larger than the entrance width is fixed to one end of the fixing wire 30 using a bolt-nut structure, and then inserted into the inner space of the fixing groove 15. Since the width of the engaging plate 32 is larger than the width of the opening on the rear side of the fixing groove 15, the engaging plate 32 can be fixed in the horizontal direction within the inner space of the fixing groove 15 . As a result, one end of the fixed wire 30 is hooked on the rear surface of the block body 11 in the horizontal direction (See FIG. 3). The fixing wire 30 which is fixed to the rear surface of the block body 11 can be vertically extended in the horizontal direction using the connecting member 30a to fix the other end to the inclined surface 34. [

The blocks 10 are stacked in layers in the same manner as in the example shown in Fig. 2 to form a retaining wall and then a retaining wall is formed between the inclined surfaces 34 and the fixing grooves 15 of the block 10 The fixing wire 30 can be provided. The total length of the fixing wire 30 is adjustable using the length-adjusting connecting member 30a. The eco-friendly concrete retaining wall block can then be constructed in such a manner that the blocks 10 are filled with the rubble 36 between the retaining wall formed by piled up and the inclined surface 34.

4 and 5, the block 40 is similar to that shown in Fig. 1 (A) except that the fixing groove 45 is formed in the form that the engaging member 46 is inserted into the rear surface of the block body 41 in advance And includes a key groove 44 and a pin groove 42 on the side surface and a connection pin 20 insertion structure, similar to the block 10 illustrated in Fig.

In the present embodiment, the fixing groove 45 is closed on the upper surface and opened on the rear surface, the width of the opening being larger than the width of the inner space. The hook structure formed at one end of the fixed wire 50 can be fixed to the engaging member 46 by fixing the hook member 46 to the inside of the fixing groove 45. [ In this example, since the locking member 46 is fixed not only in the horizontal direction but also in the vertical direction, there is an advantage that the fixing wire 50 can be installed at various angles (see FIG. 5). The fixing wire 50, which is fixed to the rear surface of the block body 41 at one end, may be extended in multiple steps using the connecting member 50a to fix the other end to the inclined surface 34. [

Similarly to the method of constructing the retaining wall block using the block 10 of the above-described example, the block 40 according to the present example is also constructed by stacking the retaining walls in several layers in the same manner as the example shown in FIG. 2 , A fixing wire 50 may be provided between the inclined surface 34 and the fixing groove 45 of the block 40, as shown in Fig. The total length of the fixing wire 50 is adjustable using the length-adjusting connecting member 50a. The eco-friendly concrete retaining wall block can then be constructed in such a manner that the blocks 40 are filled with the rubble 36 between the retaining wall formed by piled up and the inclined surface 34. [

6 to 10 illustrate a preferred embodiment of the present invention. As shown in FIGS. 6 to 10, a reinforcing member such as a reinforcing bar can be inserted in a vertical direction of a retaining wall including holes penetrating vertically, An eco-friendly concrete retaining wall block and a retaining wall structure using the same.

In the example shown in Figs. 6 and 7, the retaining wall block 60 has a block body 61 of a generally rectangular parallelepiped shape. On the upper surface of the block body 61, a protrusion 66 is formed. A through hole 67 is formed in the center of the protruding portion 66 so as to penetrate the block body 61 in the vertical direction. The through-holes 67 can be aligned with the through-holes formed in the other block bodies piled up and down. 10, one long through-hole 100 penetrating in the vertical direction of the retaining wall structure in which the blocks 60 are piled up can be formed. Since the through hole 100 is long and straight in the vertical direction of the retaining wall, a reinforcing material such as a reinforcing bar can be inserted into the through hole 100 or an injection material such as a grout material can be injected. In the example shown in Fig. 6, the reinforcing member 70, which is illustrated as being inserted into the through-hole 67, is a general line-shaped reinforcing bar. On the other hand, in the example shown in Fig. 7, the reinforcing member 80, which is illustrated as being inserted into the through-hole 67, is a reinforcing member in the form of a twisted two- It will be apparent to those skilled in the art that various types of reinforcements are possible if the shape of the reinforcement is not limited to the example shown and only the material and shape that can be inserted into the through-hole 67 are satisfied.

A straight groove 68 connected to the through-hole 67 is formed on the lower surface of the block body 61 while passing through the portion corresponding to the position of the projection 66 of the upper surface. As shown in Fig. 10, the recessed grooves 68 corresponding to the protrusions 66 are aligned with the protrusions and recesses formed in the block bodies adjacent to each other in the upper and lower retaining walls, It is possible to obtain an effect that the frictional force is increased in the horizontal direction between a plurality of block bodies stacked in a plurality of layers by engaging the protruding portions of the blocks with the concave portions of the other blocks. A keyway (64) is formed on one side or both sides of the block body (61).

On the other hand, pin grooves 62 are formed on both side edges of the upper surface of the block main body 61. This pin groove 62 is used for fixing the block main body 61 to another adjacent block main body by using the connecting pin 20. [ An example in which two adjacent blocks 60 are fixed to each other by inserting the connecting pin 20 into the pin groove 62 is illustrated in Fig.

A fixing groove 65 for fixing one end of the fixing wire 90 is formed on the rear surface of the block body 61. In the illustrated example, the fixing groove 65 is open at the top and is shaped like a wider width of the inner space than the entrance width at the rear side of the block body 61, 92 is fixed to one end of the fixing wire 90 by using a bolt-nut structure and then inserted into the inner space of the fixing groove 65 is similar to that illustrated in FIG.

In this example, on the other hand, one end of the fixing wire 90 is fixed to the fixing groove 65 on the rear surface of the block body 61, and on the other hand, is extended in multiple stages in the horizontal direction via the connecting member 90a 1 except that the position of the connecting member 90a is the inside of the block body 61, that is, the inside of the fixing groove 65. In this case, In order to adjust the length of the fixed wire 90 while repairing the retaining wall, it is necessary to maintain the inclined surface 34 and the retaining wall 60 in a state where the retaining wall structure, i.e., There is a problem that all the burrs 36 filled in between them must be poured and re-backed. According to the illustrated example, since the position of the connecting member 90a is within the block 60, it is advantageous that the retaining wall can be easily repaired without the need to pour out and refill the rubble 36. [

In addition, the method of constructing an environmentally friendly concrete retaining wall block according to the present invention comprises steps of: setting a floor at a place where the concrete retaining wall block is installed, forming a floor by using the retaining wall block, Forming a retaining wall block on the upper surface of the retaining wall block; forming a retaining wall block on the upper surface of the retaining wall block; A step of fixing the wire to an inclined surface, a step of repeating the step of installing the retaining wall block and the wire on the inclined surface, filling the gap between the retaining wall block and the inclined surface, And injecting the non-shrinkage grout through the hole. In this case, when a high shearing force is required, the method may further include inserting the reinforcing bars through the upper and lower end bolt connecting holes of the block, and injecting the non-shrinking grout material after straining.

Hereinafter, embodiments according to the present invention will be described in more detail, and the following embodiments are not limited to the legal inventions.

≪ Example 1 >

20% by weight of the performance improving binder, 30% by weight of the fine aggregate and 40% by weight of the coarse aggregate were stirred in a forced mixer, and then 5.0% by weight of water and 5.0% by weight of a functional admixture were further mixed and stirred for 3 minutes to prepare an eco- Respectively.

The performance enhancing binder was composed of 60 wt.% Blast furnace slag cement, 10 wt.% Kaolinite, 10 wt.% Celanese powder, 6 wt.% Meta kaolin, 6 wt.% Alumina cement, 1 wt.% Perlite, 1 wt.% Bentonite, 1 wt% of hydrophilic fiber, 1 wt% of polystyrene acrylic ester, 1 wt% of isoprene-isobutylene copolymer, 1 wt% of ethylene methyl acrylate copolymer, 0.5 wt% of defoaming agent and 0.5 wt% of water reducing agent Respectively.

As the water reducing agent and defoaming agent, a polycarboxylic acid reducing agent and a silicone defoaming agent were used.

≪ Example 2 >

20% by weight of the performance improving binder, 30% by weight of the fine aggregate and 40% by weight of the coarse aggregate were stirred in a forced mixer, and then 5.0% by weight of water and 5.0% by weight of a functional admixture were further mixed and stirred for 3 minutes to prepare an eco- Respectively.

The performance improving binder was composed of 54 wt% blast-furnace slag cement, 10 wt% kaolinite, 10 wt% cobalt powder, 6 wt% meta kaolin, 6 wt% alumina cement, 1 wt% perlite, 1 wt% bentonite, 1% by weight of hydrophilic fiber, 3% by weight of polystyrene acrylic ester, 3% by weight of isoprene-isobutylene copolymer, 3% by weight of ethylene methyl acrylate copolymer, 0.5% by weight of defoamer and 0.5% Respectively.

As the water reducing agent and defoaming agent, a polycarboxylic acid reducing agent and a silicone defoaming agent were used.

≪ Example 3 >

20% by weight of the performance improving binder, 30% by weight of the fine aggregate and 40% by weight of the coarse aggregate were stirred in a forced mixer, and then 5.0% by weight of water and 5.0% by weight of a functional admixture were further mixed and stirred for 3 minutes to prepare an eco- Respectively.

The performance enhancing binder was composed of 48 wt% blast-furnace slag cement, 10 wt% kaolinite, 10 wt% celanese powder, 6 wt% meta kaolin, 6 wt% alumina cement, 1 wt% perlite, 1 wt% bentonite, 5 wt% of hydrophilic fiber, 5 wt% of polystyrene acrylic ester, 5 wt% of isoprene-isobutylene copolymer, 5 wt% of ethylene methyl acrylate copolymer, 0.5 wt% of defoamer and 0.5 wt% of water reducing agent Respectively.

As the water reducing agent and defoaming agent, a polycarboxylic acid reducing agent and a silicone defoaming agent were used.

Comparative examples that can be compared to illustrate the characteristics of Examples 1 to 3 of the present invention can be easily understood. Comparative Example 1 to be described later shows a widely used cement concrete composition.

≪ Comparative Example 1 &

20% by weight of blast furnace slag cement, 30% by weight of fine aggregate, and 45% by weight of coarse aggregate were stirred in a forced mixer, and then 5% by weight of water was further mixed and stirred for 3 minutes to prepare a cement concrete composition.

The following test examples show test results comparing characteristics of the embodiment of the present invention and the characteristics of the first comparative example so as to more easily grasp the characteristics of the first to third embodiments of the present invention .

≪ Test Example 1 >

In order to compare the physical properties of the composition prepared according to the present invention with that of the environmentally-friendly concrete retaining wall block composition prepared in the comparative example, the composition of Examples 1 to 3 and the cement concrete composition prepared by Comparative Example 1 After steam curing, the strength of each was tested and the results as shown in Table 1 were obtained.

The tests were carried out according to the methods specified in KS F 2405 and KS F 2408, respectively.

division Young Example 1 Example 2 Example 3 Comparative Example 1 Flexural strength
(MPa) 1 day 5.3 5.7 5.8 4.0 7 days 6.3 6.8 7.0 4.5 28th 7.5 8.0 8.5 5.2 Compressive strength
(MPa) 1 day 29.4 30.3 31.2 28.8 7 days 36.2 37.2 38.0 33.0 28th 43.5 44.3 45.3 39.0

As shown in Table 1, the flexural and compressive strengths of the compositions prepared according to the present invention (Examples 1, 2, and 3) were much higher than those prepared in Comparative Example 1. [

That is, it was confirmed that the composition prepared according to the present invention is much superior in strength to the cement concrete composition prepared in the comparative example.

≪ Test Example 2 &

After the steam curing of the compositions of Examples 1 to 3 and those of Comparative Example 1, the rate of change in length was measured by KS F 2424 (length change test method of concrete). The results are shown in Table 2 below .

division Example 1 Example 2 Example 3 Comparative Example 1 Length change rate (%) 0.08 0.05 0.045 0.14

As shown in Table 2, it can be seen that Examples 1 to 3 have a shrinkage reduction effect by decreasing the rate of change of length as compared with Comparative Example 1. [

≪ Test Example 3 >

The results of the measurement of the green concrete block wall composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Example 1 according to the method defined in KS F 2409 after steam curing are shown in Table 3 below Respectively. If the water absorption rate is high, if the impurities or water penetrate into the concrete, the porosity increases in the interior of the concrete, thereby promoting deterioration of the structure and causing damage.

division Example 1 Example 2 Example 3 Comparative Example 1 Absorption Rate (%) 0.7 0.6 0.5 2.2

As shown in the above Table 3, the eco-friendly concrete retaining wall block composition prepared according to Examples 1 to 3 had a lower water absorption rate than the cement concrete composition prepared according to Comparative Example 1.

<Test Example 4>

According to the above-described Example 1, Example 2 and Example 3, the green concrete retaining wall block composition and the cement concrete composition prepared according to Comparative Example 1 were steam cured and then subjected to chloride ion penetration resistance As shown in Fig.

division Example 1 Example 2 Example 3 Comparative Example 1 Chloride ion penetration resistance (coulombs) 780 650 590 2,800

As shown in Table 4, it was confirmed that the eco-friendly concrete retaining wall block composition according to the present invention exhibits less resistance to chloride ion penetration than the comparative example, and is highly resistant to salt corrosion.

&Lt; Test Example 5 >

According to the above-described Example 1, Example 2 and Example 3, the green concrete retaining wall block composition and the cement concrete composition prepared according to Comparative Example 1 were vapor-cured and then subjected to the neutralization penetration depth according to the method defined in KS F 4042 The results are shown in Table 5.

division Example 1 Example 2 Example 3 Comparative Example 1 Neutralization depth (mm) 0.41 0.31 0.29 1.3

As shown in Table 5, it was confirmed that the eco-friendly concrete retaining wall block composition according to Example 1, Example 2, and Example 3 exhibited less neutralization penetration depth than the comparative example, and thus was highly resistant to neutralization.

&Lt; Test Example 6 >

The results of the measurement of the freeze-thaw resistance test according to the method of KS F 2456 after steam curing the composition of the above-described Examples 1 to 3 and the cement concrete composition prepared by Comparative Example 1 are shown.

Freezing and thawing means that the water absorbed in the concrete is frozen and melted. When freezing and thawing is repeated, fine cracks are generated in the concrete structure, and the durability is lowered.

Table 6 shows the durability indexes of the respective examples and comparative examples according to the freeze-thaw resistance test.

division Example 1 Example 2 Example 3 Comparative Example 1 Durability index 84 87 89 65

As shown in Table 6, the durability is improved because the durability indexes of Examples 1 to 3 are much higher than those of Comparative Example 1.

&Lt; Test Example 7 >

The composition prepared according to Examples 1 to 3 and the cement concrete composition prepared according to Comparative Example 1 were mixed with 2% hydrochloric acid, 5% sulfuric acid, and 2% hydrochloric acid according to the Japanese Industrial Standards draft [Test Method for Chemical Resistance by Solution Deposition of Concrete] The aqueous solution of 45% sodium hydroxide was immersed in the test solution for 28 days, and the results of the chemical resistance test were shown in Table 7 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Weight change rate (%) Hydrochloric acid -1.6 -1.2 -1.0 -10.5 -2.6 Sulfuric acid -0.4 -0.3 -0.2 -2.3 -0.9 Sodium hydroxide +0.4 +0.5 +0.6 0 +0.2

As shown in Table 7, the compositions prepared according to Examples 1 to 3 had a lower rate of weight change with respect to chemical resistance than the cement concrete composition prepared according to Comparative Example 1, and showed a high resistance to chemical resistance I could confirm.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible.

10, 40, 60: retaining wall block, 11, 41, 61:
12, 42, 62: pin groove, 14, 44, 64:
15, 45: fixing grooves, 16, 46, 66: protrusions,
16a: concave portion, 20: connecting pin,
30, 50, 90: fixing wire, 30a, 50a, 90a: connecting member,
32, 92: engaging plate, 34: inclined surface,
36: rubble, 46: latching member,
67: through hole, 68: groove,
100: Through hole

Claims (6)

delete delete delete An environmentally friendly concrete retaining wall block manufactured using an environmentally friendly concrete retaining wall block composition,
The environmentally friendly concrete retaining wall block composition comprises:
5 to 45% by weight of a performance improving binder, 15 to 65% by weight of a fine aggregate, 20 to 70% by weight of a coarse aggregate and 0.1 to 20%
Wherein the performance improving binder comprises 30 to 95% by weight of blast furnace slag cement, 1 to 30% by weight of kaolinite, 1 to 20% by weight of feldspar powder, 1 to 20% by weight of meta kaolin, 0.1 to 20% by weight of alumina cement, 0.01 to 10 wt% of bentonite, 0.01 to 10 wt% of silicon wafer waste sludge, 0.01 to 10 wt% of hydrophilic fiber, 0.01 to 10 wt% of polystyrene acrylic ester, 0.01 to 10 wt% of isoprene- 0.01 to 10% by weight of a methyl acrylate copolymer, 0.01 to 5% by weight of an antifoam agent and 0.01 to 5% by weight of a water reducing agent;
Wherein the fine aggregate is composed of sand or crushed sand having a particle diameter of 5 mm or less and the coarse aggregate is made of recycled aggregate having a particle size larger than that of the fine aggregate and a particle size of 25 mm or less,
The eco-friendly concrete retaining wall block 60 comprises:
A block body (61);
A protrusion 66 formed on an upper surface of the block body 61; And
A through hole 67 formed at the center of the protruding portion 66 and vertically penetrating the block main body 61,
/ RTI &gt;
The through-holes 67 can be aligned with the through-holes formed in the other block bodies stacked up and down. Thus, the through-holes 67 can be aligned with the through-holes through the long- 100). &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt;
5. The method of claim 4,
The eco-friendly concrete retaining wall block (60)
Further comprising a fixing groove (65) formed on a rear surface of the block body (61) for fixing one end of the fixing wire (90)
In this way, in the retaining wall structure in which a plurality of environmentally friendly concrete retaining wall blocks 60 are piled up, one end of the retaining wire 90 can be fixed in the fixing groove 65 on the rear surface of the block body 61, The other end of the wire 90 may be connected to the inclined surface 34 in a multistage manner in the horizontal direction through the connecting member 90a and may be fixed to the inclined surface 34. In this case, Wherein the connecting member (90a) is located inside the fixing groove (65).
A method of constructing an environmentally friendly concrete retaining wall using the eco-friendly concrete retaining wall block according to claim 4 or 5,
After blasting the installation point, flatten the floor;
Fixing the fixed wire (90) to the inclined surface (34) after forming the one layer of the retaining wall block using the environmentally friendly concrete retaining wall block;
Stacking the eco-friendly concrete retaining wall block on the upper surface of the one-layer retaining wall block to form a two-layer retaining wall block;
Depositing the eco-concrete concrete retaining wall block on the upper two layers of the retaining wall blocks to form three layers of the retaining wall blocks, and then fixing the wires to the inclined surfaces;
Forming a retaining wall structure having a predetermined height by repeating the step of installing the retaining wall block layer and the wire on an inclined surface;
Filling the gap between the formed retaining wall structure and the inclined surface (34); And
The reinforcing bars are inserted into the through holes 100 formed to penetrate the retaining wall structure in the up and down direction by aligning the through holes 67 of the plurality of environmentally friendly concrete retaining wall blocks forming the retaining wall structure, Strengthening steps
The method of claim 1,

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