KR100978896B1 - Concrete block - Google Patents

Abstract

PURPOSE: An environment-friendly reflective concrete block is provided to minimize environmental contamination by using recycled aggregate, fly ash, and waste glass, and to minimize a traffic accident by improving visibility. CONSTITUTION: An environment-friendly reflective concrete block is composed of a base layer and a surface layer. The base layer comprises coarse aggregate 5~15 weight%, cement 15~25 weight%, fly ash 5~15 weight%, sand 20~40 weight%, and water repellent mixture 0.3~1 weight%(S1). The surface layer comprises artificial stone 65~75 weight%, white cement 15~25 weight%, waste glass 5~15 weight%, and water repellent mixture 0.3~1 weight%(S2).

Description

Eco-friendly reflective concrete block and its manufacturing method {concrete block}

The present invention relates to an eco-friendly reflective concrete block and a method of manufacturing the same, and more particularly, to an eco-friendly reflective concrete block and a method of manufacturing the surface layer containing artificial stone and cement.

In general, a concrete block is an interlocking block for a sidewalk used for a boundary stone separating a sidewalk and a roadway or a sidewalk, a roadway, a park, and the like.

The conventional concrete block includes a base portion and a surface layer portion, the base portion includes coarse aggregate, sand, cement, stone powder, and the like, and the surface layer portion includes artificial stone and back cement.

Concrete blocks according to the prior art are susceptible to natural damage or collision damage when the strength is low, and freeze-thawing may occur repeatedly due to moisture penetrated into the concrete gap when the water absorption rate (hereinafter referred to as "absorption rate") is high. There is a problem that can cause product cracks or increase in aging, there is a problem that does not help the safe driving of the vehicle at night because it simply represents the boundaries of the sidewalks and roads or roads and roads.

The present invention has been made to solve the above problems of the prior art, environmentally friendly and durable and eco-friendly reflective concrete that can make a safe driving and sidewalk scenery of the vehicle by reflecting the light of the vehicle or the street light at night The purpose is to provide a block.

The present invention can express the surface of the eco-friendly reflective concrete block to feel similar to the natural stone to enhance the eco-friendly reflective concrete block, and increase the light reflectance of the eco-friendly reflective concrete block, the eco-friendly reflective concrete block is the vehicle accident Another object is to provide a method of manufacturing an eco-friendly reflective concrete block that can minimize and beautifully produce the landscape of sidewalks.

Eco-friendly reflective concrete block according to the present invention is a concrete block formed of a base portion and a surface layer, the base portion 5-15% by weight coarse aggregate, 20-40% by weight sand, 35-45% by weight recycled aggregate, 15-25% by weight of cement, 2-5% by weight of fly ash, and 0.3-1% by weight of water-repellent admixture relative to the cement, wherein the surface portion is 65-75% by weight of artificial stone, 15-25% by weight of cement 5-15% by weight of waste glass, and 0.3-1% by weight of water repellent admixture, compared to the back cement.

Eco-friendly reflective concrete block manufacturing method according to the invention is coarse aggregate 5-15% by weight, sand 20-40% by weight, circulating aggregate 35-45% by weight, cement 15-25% by weight, fly ash 2 A base part forming step of forming a base part by primary vibration pressing by mixing -5 wt%, water 2-5 wt%, and a water repellent admixture of 0.3-1 wt% relative to the cement; After the base portion forming step, 65-75% by weight of artificial stone, 15-25% by weight of cement, 2-5% by weight of water, 5-15% by weight of waste glass relative to the artificial stone, 0.3 compared to the back cement And a surface layer forming step of forming the surface layer by secondary vibration pressure molding by mixing -1% by weight of a water repellent admixture.

The water-repellent admixture is a silicone acceptor that blocks water absorption of the environmentally-friendly reflective concrete block to prevent whitening, to prevent contamination of the surface, and to block sodium hydroxide compounds to increase corrosion resistance.

      The fly ash improves durability by increasing the strength of the block and resistance to freezing and thawing using a pozzolanic reaction.

 The surface layer forming step is to mix the waste glass of 0.1mm ~ 1mm thickness so that the environment-friendly reflective concrete block is reflected in the weak light at night to increase the visibility and viewability of the sidewalk and the sidewalk.

Eco-friendly reflective concrete block according to the present invention configured as described above has the advantage of suppressing environmental pollution because recycled aggregates, fly ash, and waste glass are used, the fly ash occurs when the recycled aggregates are used The breakdown load may be prevented from being lowered, and the resistance to freeze-thawing may be increased due to the fly ash, thereby increasing durability.

In addition, the eco-friendly reflective concrete block according to the present invention is a strong alkaline calcium hydroxide produced by the hydration reaction of cement is neutralized by the pozzolanic reaction of the fly ash, there is an advantage that can minimize the environmental pollution by calcium hydroxide.

In addition, the eco-friendly reflective concrete block according to the present invention minimizes the absorption of moisture to the surface of the surface layer due to the water-repellent effect of the water-repellent admixture of the surface layer portion is prevented by organic matter and by the sodium hydroxide sprayed for winter snow removal work The corrosion resistance can be prevented, and the water-repellent admixture fills the pores of the concrete composition, so there is an advantage of enhancing the bonding strength of the concrete composition.

In addition, the eco-friendly reflective concrete block according to the present invention is a water-repellent admixture is mixed 0.3-1% by weight relative to cement, the water-repellent admixture is mixed 0.3-1% by weight compared to the cement, castration is combined with the concrete composition early To increase the intensity before 28 days of age.

In addition, the manufacturing method of the eco-friendly reflective concrete block according to the present invention has a high strength of the artificial granite boundary stone and the interlocking block, and it is environmentally friendly and the reflective concrete block can minimize the accident of the vehicle because it increases the visibility of the driveway and sidewalks. There is an advantage that can be prepared.

1 is a perspective view of an embodiment of an environment-friendly reflective concrete block according to the present invention,
Figure 2 is a flow chart of one embodiment of a method for manufacturing an environmentally friendly reflective concrete block according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an embodiment of an environment-friendly reflective concrete block according to the present invention.

Eco-friendly reflective concrete block (1) according to the present embodiment is to install the boundary of the sidewalk and the roadway or the sidewalk and the roadway in succession, marking the boundary of the sidewalk and the roadway and paving the sidewalk, the base portion (2), The surface layer part 4 formed in at least one surface of the base part 2 is included.

Base layer 2 is 5-15% by weight coarse aggregate, 20-40% by weight sand, 35-45% by weight recycled aggregate, 15-25% by weight cement, 2-5% by weight fly ash, cement 0.3-1% by weight of water-repellent admixture is included.

Substrate 2 is used recycled aggregate recycled construction waste instead of conventional stone powder.

Fly ash is a coal material collected by dust collector from flue gas of boiler burning pulverized coal. It is composed of 2,400 ~ 4,000cm2 / g as spherical particles, and its main component is SiO₂ ( 55 ~ 65% by weight), Al₂O₃ (27% ~ 33% by weight), which is made by continuously performing pozzolanic reaction with calcium hydroxide (Ca (oH) ₂) generated from hydration of portland cement and SiO₂ Forming paste improves the binding strength of aggregates, improving product strength and durability.

In concrete products, concrete aging occurs due to freezing and thawing when moisture enters the concrete gap, and leaching of calcium hydroxide (Ca (OH) ₂) produced by the hydration of portland cement causes large infiltration of moisture. It creates a gap, and freezing causes the water to expand by about 9% by volume. At this time, a pressure of 30,000 psi causes the concrete to crack.

Fly ash combines calcium silicate (Ca (oH) ₂), a strong alkaline (PH 12-13) produced by the hydration reaction of cement, to produce cementitious adhesives. By reducing the amount of calcium hydroxide leaching to the outside it is possible to increase the resistance to freezing and thawing, and to minimize the whitening phenomenon.

Fly ash reduces the moisture required for blending by 2-10% by weight, which limits the penetration of moisture because spherical particles of fly ash reduce bleeding passages and voids, and reduce bleeding passages. Increases durability.

The water-repellent admixture is a silicone-based water-repellent, which contains 0.3-1% by weight of cement, increases the early strength within 28 days, and exhibits the water-repellent effect, thereby preventing water absorption of the concrete bubble and preventing contamination by organic matter. Blocks the absorption of sodium hydroxide compounds by winter snow removal.

The surface layer part 4 contains 65-75 weight% of artificial stones, 5-15 weight% of waste glass 6, 15-25 weight% of back cement, and 0.3-1 weight% water-repellent admixture with respect to a back cement.

 Artificial stone is used, such as Baekjong, black stone, and the like.

The waste glass (6) reflects a vehicle or a street light at night to clearly display the boundary of the road or to enhance the visibility and view of the sidewalk, and is 0.1mm to 1mm thick to increase product molding and light reflectance. Crushed waste glass is used.

  Water-repellent admixture is a water-soluble silicone water-soluble silicone filler, which fills the voids of concrete composition, enhances the binding strength of the composition, improves product strength, and fills the voids of concrete composition to block water absorption of concrete blocks by water repellent effect. Absorption rate of concrete blocks can be lowered below 4%.

In addition, the water-repellent admixture prevents contamination by organic matter by blocking moisture absorption on the surface of the eco-friendly reflective concrete block (1), and also blocks sodium hydroxide sprayed for winter snow removal, so that the eco-friendly reflective concrete block (1) To increase the corrosion resistance and durability, and to increase the strength of the bonding composition of the concrete composition.

Table 1 shows the absorption rate and product strength of concrete blocks containing circulating aggregate, fly ash, and water repellent admixture in the base, and water repellent admixture and waste glass in the upper part, and concrete blocks without fly ash, water repellent admixture or waste glass. And test results.

No Primary (base part) / secondary (surface part) compounding ratio Flexural strength (mpa)
Absorption rate (%)
Cement / Back Cement (kg) Fly ash (kg) Sand / Dolomite (kg) (1st / 2nd) Recycled Aggregate (kg)
(Primary) Coarse aggregate (kg)
(Primary) Water (1st / 2nd) Water-insoluble admixture
(1st / 2nd) Waste Glass (kg)
(Secondary) Comparative Example 1 300/70 0 600/300 750 150 60/10 0 0 4.8 10 Comparative Example 2 300/70 50 600/300 750 150 70/10 0 0 5.1 7 Comparative Example 3 300/70 50 600/300 750 150 70/10 0 0 5.6 5 Comparative Example 4 300/70 50 600/300 750 150 70/10 0 0 6.1 4 Example 1 300/70 50 600/300 750 150 70/10 1 / 0.4 15 5.8 3 Example 2 300/70 50 600/300 750 150 70/10 1.5 / 0.5 30 6.2 2 Example 3 300/70 50 600/300 750 150 70/10 2 / 0.7 45 6.5 2

Comparing the test results of Table 1, Comparative Example 1 is a general concrete block containing circulating aggregate and not containing fly ash or water repellent admixture or waste glass, and Comparative Example 2 is mixed with circulating aggregate and fly ash and adding water repellent admixture. This concrete block is not included and is the result of measuring the 28-day flexural strength and water absorption.

Comparative Example 3 is a case of measuring the 60-day bending strength and absorption in Comparative 2, Comparative Example 4 is a result of measuring the 90-day bending strength and absorption in Comparative Example 2.

Examples 1 to 3 are environmentally-friendly reflective concrete blocks of the present invention containing the circulating aggregate, fly ash, waste glass and water-repellent admixture in Comparative Example 2.

In Comparative Example 2, 15 to 20 %% of the fly ash was mixed with the cement in Comparative Example 1, but the breaking load and the absorption were improved, but the breaking load and the absorption were not changed to a satisfactory level.

Thus, as in comparison 3 and 4, the pozzolanic reaction of fly ash reacts with calcium hydroxide and fly ash silicate from the hydration of primary cement to continuously produce cement paste to bond the concrete composition to fill the voids. Since strength and water absorption are improved, it can be seen that sufficient strength and water absorption are improved after 90 days of age strength.

On the other hand, Examples 1 to 3, 0.3%, 0.5%, 0.7% of the water-repellent admixture of the base layer portion 2 compared to the cement compared to Comparative Example 2, 0.6% of the water-repellent admixture of the surface layer portion 4, compared to the back cement, When 0.7% and 1% are added, the bending strength and water absorption can be seen to be satisfactory.

In consideration of the fact that the KS standard of the concrete boundary stone manages the water absorption at 5% or less, the base portion 2 preferably has a mixing ratio of the water-repellent admixture in the range of 0.3-1% by weight with respect to cement, and the surface layer portion. (4), the mixing ratio of the water-repellent admixture is preferably 0.3-1% by weight compared to the back cement.

Figure 2 is a flow chart of one embodiment of a method for manufacturing an environmentally friendly reflective concrete block according to the present invention.

The manufacturing method of the eco-friendly reflective concrete block according to the present embodiment includes a base part forming step (S1), a surface layer forming step (S2), a curing step (S3), and a short processing step (S4).

Base part forming step (S1) is 5-15% by weight of coarse aggregate, 20-40% by weight of sand, 35-45% by weight of circulating aggregate, 15-25% by weight of cement, 2-5% by weight of fly ash The base layer is molded by primary vibration pressing by mixing 2-5 wt% of water and 0.3-1 wt% of a water repellent admixture with respect to cement.

Surface layer forming step (S2) is after the base layer forming step, 65-75% by weight of artificial stone, 15-25% by weight of cement, 2-5% by weight of water, 5-15% by weight of artificial stone, 0.3- A surface layer portion is formed by secondary vibration pressing by mixing 1% by weight of a water repellent admixture.

Curing step (S3) is cured after the surface layer forming step.

Short processing step (S4) after the curing step, by spraying the fine metal particles to the surface of the environment-friendly reflective concrete block (1) is short processed.

Eco-friendly reflective concrete block (1) in which fine rapid particles are sprayed is an eco-friendly reflective type in which irregularities such as a shape of natural stone polished on the surface are expressed, and fine metal particles, for example, metal particles of 0.1 to 1 mm are sprayed. The concrete block 1 has irregularities such as a shape of natural stone polished on the surface, and fine metal particles remove foreign substances on the surface of the waste glass to increase the reflectance by the waste glass.

1: concrete block 2: substrate
4: surface layer 6: waste glass

Claims (5)

In the concrete block formed of the base layer and the surface layer,
The base portion 5-15% by weight of coarse aggregate, 20-40% by weight of sand, 35-45% by weight of circulating aggregate, 15-25% by weight of cement, 2-5% by weight of fly ash, 0.3% of the cement Contains 1% by weight of a water repellent admixture,
The surface layer is 65-75% by weight of artificial stone, 15-25% by weight of cement, 5-15% by weight of waste glass compared to the artificial stone, and 0.3-1% by weight of water-repellent admixture compared to the back cement Type concrete block. 5-15% by weight of coarse aggregate, 20-40% by weight of sand, 35-45% by weight of circulating aggregate, 15-25% by weight of cement, 2-5% by weight of fly ash, 2-5% by weight of water, A base part forming step of forming a base part by primary vibration pressing by mixing 0.3-1% by weight of a water-repellent admixture with respect to the cement;
After the base portion forming step, 65-75% by weight of artificial stone, 15-25% by weight of cement, 2-5% by weight of water, 5-15% by weight of waste glass relative to the artificial stone, 0.3 compared to the back cement Method for producing an environmentally-friendly reflective concrete block comprising a surface layer forming step of forming a surface layer by secondary vibration pressure molding by mixing a water-repellent admixture of -1% by weight. The method of claim 2,
The water-repellent admixture is a method for producing an eco-friendly reflective concrete block is a silicone water-repellent to block the water absorption of the eco-friendly reflective concrete block to prevent whitening and to prevent contamination of the surface and sodium hydroxide compound to increase the corrosion resistance. The method of claim 2,
The fly ash is a method of manufacturing an environmentally-friendly reflective concrete block to improve the durability and increase the strength and freeze-thawing resistance of the environmentally-friendly reflective concrete block block using a pozzolan reaction. The method of claim 2,
The surface layer forming step is an environment-friendly reflective concrete block reflecting the environment-friendly reflective concrete block in the weak light at night to mix the waste glass of 0.1mm ~ 1mm thickness to increase the visibility and viewability of the sidewalk and the road. Manufacturing method.

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