KR102294033B1 - Eco-friendly concrete composition - Google Patents

Abstract

The present invention relates to concrete which comprises sand, aggregate, coal ash, cement, silica, alumina, iron oxide, a binding agent with a vegetable binder, and water. The aggregate includes: recycled quartz having a particle size of 5 mm or less; waste glass powder; and ground waste plastic of an edible plastic container. The aggregate includes 70 wt% of sand and stone, 10 wt% of the ground waste plastic, 10 wt% of the recycled quartz, 5 wt% of the waste glass powder, and 5% of vegetable fiber. The vegetable fiber is formed of dried sugar cane residues. Accordingly, the present invention can provide the advantages in that natural organic matter is added such that the generation of harmful substances is reduced; concrete is prepared by recycling a large amount of waste, thereby being eco-friendly; and a high strength-to-weight ratio is provided by adding fiber.

Description

Eco-friendly concrete composition {Eco-friendly concrete composition}

The present invention relates to an eco-friendly concrete composition, and more particularly, to an eco-friendly concrete composition used for ready-mixed concrete or poured concrete and bricks.

In general, concrete is a building and civil structural material, made by mixing cement, various aggregates, and water. Various materials such as sand, gravel, and stone chips are used as aggregates.

Concrete is made through a mechanical mixing process in which aggregate and cement are placed in an acceptable drum, poured with water and thoroughly mixed. This concrete is transported to and used by a ready-mixed concrete vehicle.

Ready Mixed Concrete is manufactured using cement, aggregate (sand, gravel), water, and admixture materials at a factory equipped with concrete manufacturing facilities, and then a truck mixer or agitator truck is used. It is concrete in a flexible state that is not hardened and transported to the construction site using a mixture of cement, water, sand, gravel and admixture.

The general concrete used so far is just a simple solvent for making concrete structures at the construction site, and after pouring and hardening, it has no other functionality other than the structure, and environmental problems are constantly being raised due to its toxicity. .

Concrete has a strong alkalinity with a pH of 12.5 to 13, and when cement, which is a raw material, is hardened, harmful factors such as carbon dioxide (CO2), ammonia basic gas, and radon (Rn) that can be fatal to the indoor environment are generated. factors cause sick house syndrome.

In particular, carbon dioxide and base generated during concrete hardening as above are the main causes of corrosion of reinforcing bars and the like, and there is a problem in that the structure is weakened due to expansion cracks due to corrosion of rebar and the lifespan of the building is shortened.

In addition, since conventional concrete mostly uses natural resources as aggregates, it depletes aggregate resources, and there is a passive problem in the use of mass wastes that are difficult to treat such as plastics.

For reference, as a concrete manufacturing technology, 'concrete composition containing deodorizing cement mixture' disclosed in Patent Registration No. 10-1613906 and 'Environment-friendly cement concrete composition for Racon' disclosed in Patent Registration No. 10-1779565 may be referred to. can

The present invention has been improved by sufficiently studying the existing problems as described above, and it is to provide an eco-friendly concrete composition with less generation of harmful substances than before, an eco-friendly recycling of wastes, and a high strength compared to weight.

The eco-friendly concrete composition according to the present invention for solving the above problems includes sand, aggregate, coal ash, cement, silica, alumina, iron oxide, a binder containing a vegetable binder, and water, and the aggregate is recycled having a particle size of 5 mm or less Quartz, waste glass powder, and pulverized waste plastics from edible plastic containers, comprising 70 wt% sand and stone, 10 wt% pulverized waste plastics, 10 wt% recycled quartz, 5 wt% waste glass powder, and vegetable fibers Consisting of 5% water, the vegetable fiber includes dried sugar cane waste.

The vegetable binder suitably includes sugar cane sap and acacia tree sap.

The sugar cane residue is a wet fiber pulverized by mixing with water, and it is appropriate to use one having a thickness of 5 mm or less.

The vegetable fiber, as a dried corn stalk, further comprising a fiber pulverized to a thickness of 5 mm or less, wherein the vegetable fiber may include 70 to 90% by weight of sugar cane residue and 10 to 20% by weight of the dried corn stalk have.

The vegetable binder further includes a natural mixture, and the natural mixture includes 10 to 15 parts by weight of lacquer lacquer, 3 to 5 parts by weight of camphor essential oil, 0.5 to 1 parts by weight of an evergreen bark extract, based on 100 parts by weight of the total composition. can do.

The pulverized waste plastic may include PP, PE, PA, PET, PC, PS, PVC, and melamine except for plasticizers of environmental hormones.

The present invention described as described above can provide an eco-friendly concrete composition with high strength compared to the weight by mixing natural organic matter, which is environmentally friendly by recycling a large amount of waste, and is environmentally friendly by mixing natural organic matter.

1 is a schematic layout view for concrete mixing of materials constituting a concrete composition according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to specific embodiments shown in the accompanying drawings. The differences in the embodiments are not mutually exclusive and should be understood in a complex manner, and without departing from the spirit and scope of the present invention, specific shapes, structures and characteristics described in relation to the embodiments are implemented in other embodiments. can be

Concrete according to an embodiment having high practical implementation and high industrial applicability among various embodiments of the present invention will be described with reference to the conventional matters as described above.

Hereinafter, the main components of concrete according to an embodiment of the present invention will be described with reference to the drawings. Reference numerals except for some devices in this embodiment indicate storage tanks of each material.

1, the eco-friendly concrete composition according to an embodiment of the present invention, aggregate 20, coal ash 25, cement 30, silica, alumina, iron oxide, a binder containing a vegetable binder 41 ( 40), and water.

The aggregate 20 is 70% by weight of sand 10 including stone, 10% by weight of crushed material of waste plastic 21 in an edible plastic container, 10% by weight of recycled quartz having a particle size of 5 mm or less, 5% by weight of waste glass powder, And it is provided including 5% by weight of vegetable fiber including sugar cane offal (22).

Regenerated quartz and waste glass powder used as the aggregate 20 in this embodiment significantly helps in the treatment of construction waste, has excellent bonding strength by the cement 30, and has high self-strength to create a reinforced concrete structure. can

The stone may include waste concrete pulverized material. The waste concrete crushed product is pulverized and cleaned into small pieces so that the concrete demolished of buildings or roads can be recycled, and it is reused as a concrete material, and provides the advantage of increasing economic efficiency and eco-friendliness according to the recycling aspect of waste concrete.

On the other hand, the stone may further include a pulverized product of basalt and granite. Basalt pulverized material is a material that can be used in areas with a lot of basalt such as Jeju Island. It is porous and has high strength, so it is sufficient for concrete material. In addition, the crushed granite, as a stone panel for finishing the exterior wall of an existing building, is useful in terms of recycling waste generated when the building is demolished.

The pulverized waste plastic 21 may include PP, PE, PA, PET, PC, PS, PVC, and melamine except for plasticizers containing environmental hormones. This type of waste plastic 21 excludes plasticizers containing environmental hormones, and is mainly used for edible containers.

Currently, delivery food due to COVID-19 is on the rise, and the use of plastic containers is also increasing significantly and further increasing. As COVID-19 prolongs, lifestyle leads to increase in delivery food. As this trend is expected to be maintained, disposal of edible containers poses significant challenges. That is, since the edible container is difficult to clean and cannot be recycled, it is disposed of as it is buried.

In terms of recycling such edible container waste, using it as a concrete material has a significant advantage. That is, the edible container classified from municipal waste can be used as a concrete material after a large amount of washing, cutting, and grinding processes are performed.

The waste plastic 21 material presented above, as having a rigid enough to be used as an edible container, if used as a part of the concrete material, helps in the treatment of waste and serves to reduce the weight of the concrete. As will be described later, the pulverized material of the waste plastic 21 by the vegetable binder 41 may be sufficiently mixed with the existing concrete materials to be combined.

Silica may include nanoSiO2. nanoSiO2 is nano silicon dioxide, which improves the performance in terms of the structural material of cement 30 or concrete. By using the nano silicon dioxide as the binder 40, concrete can have ultra-high pressure, high abrasion resistance, erosion, corrosion, and penetration prevention functions.

The binder 40 further includes at least one of trisilicate silicate, dilime silicate, and trilime aluminate, and may further include an alkali solution or a geopolymer paste.

Geopolymer paste is an inorganic polymer composite as an aluminosilicate binder synthesized by thermal activation of solid aluminosilicates such as fly ash, metakaolin, GGBS, etc. together with alkali metal hydroxide and sodium silicate solution.

In this geopolymer paste, the influence of parameters such as the concentration of sodium hydroxide and alkali-fly ash ratio with an appropriate formulation design for fly ash-sand-aggregate provides desirable compressive strength, and the curing time for the development of compressive strength and other parameters such as curing temperature and the microstructure of fly ash-based geopolymer pastes and mortars can be adjusted according to settings according to monitoring.

On the other hand, the vegetable binder 41, the sugar cane solution 42, and the acacia tree sap 43 or containing the extract, may further include a natural rubber solution (44).

The sugar cane solution 42 contains saccharides having a sticky property, and improves the bonding properties of the waste plastic 21 pieces and other aggregates 20 types. In particular, sugar is used to harden the coal ash 25 Since it has been found to act as a useful binder 40, it is possible to exert the same effect as sugar if the sugar cane solution 42, which is a raw material for sugar, is used.

This sugar cane solution 42 is mixed with the existing binder 40 to delay the initial rapid hardening of the coal ash 25 together with the other aggregates 20, while the coal ash 25 and aggregate 20 as a liquid state. It easily penetrates into the pores of the

Sugarcane residue 22 is a wet fiber that is mixed with water and pulverized, and it is appropriate to use one having a thickness of 5 mm or less.

The sugar cane waste 22 is agricultural waste generated in large quantities after processing of sugar cane grown and produced in tropical or subtropical regions, and in an area where sugar cane is grown and processed, waste treatment and I am very interested in using it.

The sugar cane waste 22 contains many fibers longer and tougher than other plants, and the fibers are not easily damaged during the compression process of sugar cane. Since the sugar cane waste 22 contains significant residual sugar, it is difficult to dry and not easy to use after drying.

Accordingly, the sugar cane residues 22 are transported to the concrete factory as they are while maintaining the wet state, and the toughness of the fibers is made soft and tough while steaming or boiling, and then mixed with water and dilute and melted with sugar. There is an advantage that it can be used as it is put into the concrete mixer 120 as it is mixed with water and sugar after being cut into small fibers by the agitator 100 and the pulverizing and cutting machine 110 after the process.

As such, if the sugar cane residue 22 is used as a material for concrete, after the concrete is cured by the tough fibers of sugar cane, the fibers are included in various directions and structures in the concrete, and the longer the curing time after curing, the more the fibers become. As it dries sufficiently, high-strength concrete is made, and breathability can be provided through the fibers in the concrete, and it is of considerable economic help to the region suffering from the difficulty of processing the sugar cane waste 22 .

Vegetable fibers further include fibers pulverized to a thickness of 5 mm or less as the dried corn stalks 23 . These vegetable fibers may include 70 to 90% by weight of the dried sugarcane offal 22 and 10 to 20% by weight of the dried corn stalks 23 .

Along with sugarcane, maize is cultivated worldwide. As corn fruits are separated through the harvesting season, the stems and leaves are pulverized and cut to be used as manure or feed. This corn stalk is a material containing very strong fibers when dried, similar to sugar cane, and is sufficient to be used as a material for concrete.

In this embodiment, although it has been described that fibers obtained by mixing some fibers of the corn stem 23 with the sugar cane grounds 22 are used, only the sugar cane grounds 22 may be used alone, and when some materials are limited, corn stems (23) can be mixed and used. The corn stalks 23 may be put into the concrete mixer 120 after being put together in the process of stirring and pulverizing the sugar cane waste 22 and pulverized into small pieces.

As described above, since the sugar cane waste 22 and the corn stalks 23 are mixed with water and put into the concrete mixer 120, the substantially pure input of water is limited to an appropriate amount required for concrete mixing.

The acacia tree sap 43 is obtained from the acacia tree. The acacia tree is a tree with high growth potential and adaptability to the environment, and it is a tree species that contributed greatly to afforestation of the country.

Since these acacia trees are mass-cultivated and grow rapidly, sap can be collected in turns without harming a large reforestation area. When the concentration of the acacia tree sap 43 is increased, the acacia tree sap 43 provides adhesive strength while exhibiting properties such as gum. In particular, since it has a gum-like property, it can significantly help in the agglomeration of the pulverized waste plastic 21, other used aggregates 20, and vegetable oils.

Natural rubber liquid 44 is also used as a material for gum, and has excellent adhesion to various materials, and may be used by being mixed with the acacia tree sap 43 as a part of the vegetable binder 41 .

Meanwhile, the vegetable binder 41 may further include a natural mixture 45 . This natural mixture 45 may include 10 to 15 parts by weight of raw lacquer lacquer, 3 to 5 parts by weight of camphor essential oil, and 0.5 to 1 parts by weight of an evergreen bark extract based on 100 parts by weight of the total composition.

The raw lacquer lacquer can be obtained by putting lacquer in an organic solvent and extracting it at a low temperature, and since it exhibits very high film strength, durability, waterproofness and insect repellent effect, it can be added to mortar to give waterproofness and enhance durability as well as insect repellency. By showing the effect, it is possible to provide improvement in the quality of concrete by blocking external interference during the curing process.

Camphor tree is native to Jeju Island, and essential oil components such as camphor, safrol, and cineol contained in camphor show excellent antibacterial activity, strong volatility, and refreshing and strong fragrance. Due to this, it is possible to remove the peculiar smell when mixing the mortar, and it is possible to remove the possibility of bacterial generation during the curing process after the mortar is installed. In addition, since it shows strong volatility, it evaporates together with moisture particles during the curing process, thereby shortening the curing period of concrete.

Kiraya saponin, which is contained in a large amount in the evergreen bark extract, has a large number of hydroxyl groups in the molecule, and is known to have excellent surfactant effect among saponins. By adding such an evergreen bark extract as a catalyst, the vegetable binder 41 may be uniformly mixed, contaminants may be reduced, and the possibility of bacterial generation may be eliminated to improve the quality of the mortar and increase durability.

On the other hand, since the eco-friendly concrete composition as described above contains a significant amount of natural substances, it is fermented for a certain time in a frame for making a concrete block, is formed into a cuboid-shaped cake, and is then cut to an appropriate size of the concrete block. It can be made of eco-friendly aerated concrete after being moved to a curing room and cured, and can also be used for finishing interior and exterior walls of buildings.

Although the embodiments of the present invention have been described as described above, those of ordinary skill in the art based thereon can add or change components within the scope that does not depart from the essential technical spirit of the present invention described in the claims. , it will be possible to variously modify and change the present invention by deletion or addition, which is also included within the scope of the present invention.

10: sand 20: aggregate
21: plastic waste 22: sugar cane waste
25: coal ash
23: corn stalk 30: cement
40: binder 41: vegetable binder
42: sugar cane sap 43: acacia tree sap
44: natural rubber liquid 45: natural mixed liquid
100: agitator 110: grinder and cutter
120: mixer

Claims (6)

Aggregate, coal ash, cement, silica, alumina, iron oxide, a binder containing vegetable binder and water,
The aggregate is 70% by weight of sand containing stone, 10% by weight of pulverized waste plastic of an edible plastic container, 10% by weight of recycled quartz having a particle size of 5 mm or less, 5% by weight of waste glass powder, and sugarcane residue and corn stalks. Contains 5% by weight of vegetable fiber,
The vegetable fiber comprises 70 to 90% by weight of sugarcane offal and 10 to 20% by weight of dried corn stalks,
The vegetable binder includes sugar cane sap, acacia tree sap, and a natural mixture extracted from sugar cane residue,
The natural mixture contains 10 to 15 parts by weight of raw lacquer lacquer, 3 to 5 parts by weight of camphor essential oil, 0.5 to 1 parts by weight of an evergreen bark extract based on 100 parts by weight of the total,
The sugar cane residue of the vegetable fiber is a wet fiber having a thickness of 5 mm or less that is mixed with water and pulverized, and after making the toughness of the fiber soft and tough while maintaining a wet state and going through a steaming or boiling process, water and It is mixed and subjected to a soaking process so that the sugar is diluted and melted, and then it is released into small fibers in a stirrer and grinder and cutter and cut and processed, and then water and sugar are mixed and put into a concrete mixer.
The vegetable fiber corn stalks are put together in the process of stirring and pulverizing the sugar cane residue, and are then put into a concrete mixer after being pulverized into small pieces,
The pulverized waste plastic is a concrete composition comprising PP, PE, PA, PET, PC, PS, PVC, and melamine excluding plasticizers containing environmental hormones. delete delete delete delete delete

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