KR100632790B1 - Composite of remicon using industrial waste matters and sand, pebbles - Google Patents

Abstract

The present invention relates to a ready-mixed concrete composition used for road paving or building floor paving using various waste foundry sand and waste aggregate.

The present invention disclosed is a cement which is 14% by weight of the total weight;

A puddle aggregate of 39% by weight in which the particle size distribution is pulverized to the same size as the grains of sand and the yarn is mixed in a 3: 7 weight ratio;

40% by weight of waste aggregate whose waste concrete is separated by type and size, and whose particle size distribution is crushed to a size of 25 mm or less;

Admixture that is 1% by weight based on the total weight; And

Characterized in that the mixture is made of water which is 6% by weight based on the total weight,

Accordingly, it is possible to maximize the utilization of waste resources by minimizing the recycling of industrial wastes and aggregates discarded by each company to ready-mix concrete or concrete for building floors, minimizing environmental pollution, reducing costs, and eliminating landfill difficulties. .

Description

Composition of ready-mixed concrete using waste foundry sand and waste aggregates {COMPOSITE OF REMICON USING INDUSTRIAL WASTE MATTERS AND SAND, PEBBLES}

1 is a schematic configuration diagram showing an embodiment of a ready-mixed concrete manufacturing apparatus using waste casting sand and waste aggregate according to the present invention,

Figure 2 is a process chart showing a ready-mixed concrete manufacturing method using waste casting sand and waste aggregate according to the present invention.

<Description of the symbols for the main parts of the drawings>

100 to 102: first to third hopper 103: water tank

108: main conveyor belt 109: mixer

110: storage tank

The present invention is a concrete road paving or building floor paving ready-mixed concrete using waste foundry sand (부산 物 砂) and waste aggregate (廢 骨材) generated during the dismantling of concrete structures in steelmaking, foundries, ports, ships and steelmaking process (REMICON: Ready Mixed Concrete) composition, and more particularly, by sorting and separating the waste foundry sand and aggregate containing a large amount of harmful substances by size to regenerate the road concrete or building floor paving ready-mixed concrete safely, The present invention relates to a composition of ready-mixed concrete using waste foundry sand and aggregates to maximize utilization of waste resources and to minimize environmental pollution.

In general, the casting industry is a field that needs continuous support development at the national level, such as industrial machinery, ports, ships, automobile parts, and metal machine tools.

Various waste castings generated during the smelting and production process of each company are added with various chemicals, which are components of the wastewater treatment agent, and a large amount of iron oxide, zinc oxide, silica calcium silica, and some sulfur, etc. It is included. And the harmful substance contains a small amount of lead, cadmium, chromium, copper and the like.

Although such waste foundry sands can be recycled and used, most of them rely on landfills or are left unattended due to the lack of technology for reclaiming waste foundry sands at each company, excessive investment costs, and the avoidance of recycled foundry sands at foundries. Is most of them.

In addition, when dismantling the aged concrete structure, a large amount of concrete waste, that is, waste concrete is discharged. Considering the trend of dismantling old buildings due to recent redevelopment or reconstruction, it is estimated that the amount of waste concrete will reach millions of tons per year, of which over 60% of the total can be collected and recycled.

Such waste concrete is crushed to a certain size and used as a backfill of retaining walls, but its amount is insignificant, and most of it is used for reclamation, such as reclaimed land or discarded in landfills, such as the waste foundry sand. There was also a negative aspect of disposal of useful resources.

In this way, the waste foundry and industrial waste generated from each company are not recycled and landfilled in a certain place without being recycled. Therefore, environmental pollution, as well as landfill cost and increase in waste foundry sand and waste aggregate. There is a problem that increases the difficulty of landfills.

In particular, the use of natural sand and gravel instead of recycling waste aggregate and waste foundry sand in the manufacture of ready-made concrete for road pavement and construction of concrete structures results in the depletion of natural resources. It is becoming.

Therefore, it is desirable to provide a ready-to-use concrete and concrete for cheap floor pavement in terms of economics, and in terms of reliability, to maximize utilization of waste resources and to prevent environmental pollution.

Accordingly, an object of the present invention is to sort and separate various waste foundry sand and aggregates by size instead of the appropriate amount of yarn (natural sand and gravel) used in the production of ready-mixed concrete for paving the floor of a general building or reinforcing strength as needed. In providing ready-mixed concrete.

Another object of the present invention is to provide a ready-mixed concrete using the selected waste foundry sand and waste aggregate as aggregate, such as uneven wall and slab.

Still other objects of the present invention will become more apparent from the following detailed description.

According to the ready-mixed composition using the waste foundry sand and waste aggregate according to the present invention for achieving the above object, the cement and the particle size distribution is 14% by weight of the total weight, the waste foundry sand and yarn 3 : 39% by weight of paddle aggregate aggregated in 7% by weight ratio, 40% by weight of waste aggregate, the waste concrete is separated by type and size, the particle size distribution is crushed to 25mm or less size, 1% by weight relative to the total weight It is characterized by consisting of a blending agent of% and water of 6% by weight relative to the total weight.

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In this way, various waste foundry sands, which are industrial wastes from each company's smelting and production process, and waste aggregates generated during the dismantling of concrete structures are collected and pulverized to a certain size through sorting, separating, and crushing operations to remove foreign substances. By mixing a predetermined amount of cement, admixture, and water in the various waste foundry sand and waste aggregate from which foreign matters are removed, it can be seen that the concrete is recycled into a road paving or floor paving ready-mixed concrete.

As a result, various waste foundry sands and waste aggregates generated at the time of dismantling of concrete structures are recycled into floor paving ready-mixed concrete, maximizing the utilization of waste resources and minimizing environmental pollution and eliminating landfill difficulties. There is this.

And, there may be a plurality of embodiments of the present invention, hereinafter will be described in detail with respect to the most preferred embodiments below.

Through this preferred embodiment, it is possible to better understand the objects, features and advantages of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the ready-mixed concrete composition using the waste molding sand and waste aggregate according to the present invention.

1 is a schematic configuration diagram showing an embodiment of a ready-mixed concrete manufacturing apparatus using waste casting sand and waste aggregate according to the present invention.

The ready-mixed concrete manufacturing apparatus using waste foundry sand and waste aggregate according to the present embodiment is selected by a specific size and type, and the first hopper (100) that receives the waste-casting aggregate containing yarns in the waste foundry sand in which foreign substances are removed, and discharges it by a predetermined compounding ratio (100). ), And the second and third hoppers 101 which are selected by the predetermined size and type and are supplied with a predetermined mixing ratio by receiving the waste gravel and cement of the waste concrete, the particle size distribution of which is crushed to a size of 25 mm or less, and the foreign matters are removed. (102), a water tank (103) storing water and supplying it through a supply pipe (107), and a predetermined ratio of waste casting aggregate and waste gravel discharged from the first to third hoppers (100 to 102). And first to third conveyor belts 104 to 106 for conveying cement, and the waste casting aggregate and waste gravel and cement conveyed from the first to third conveyor belts 104 to 106, respectively. The main conveyor belt 108 to be transported, and the water supplied from the supply pipe 107 and a predetermined amount of waste casting aggregate and waste gravel and cement transferred through the main conveyor belt 108 are stirred and mixed together with the admixture. The mixer 109 and the storage tank 110 for storing and distributing the confined concrete and weighing the weight with a predetermined weight as needed, through the discharge passage 111.

The ready-mixed concrete manufacturing method using waste foundry sand and waste aggregate according to the present invention through such a ready-mixed concrete manufacturing apparatus will be described in more detail with reference to FIG. 2.

Before collecting the waste foundry sand discarded by each company and the waste aggregate generated during the dismantling of the concrete structure, that is, the waste concrete and putting it into the first to third hoppers 100 to 102, first, the collected waste foundry sand and the waste concrete by size and Sorting and separating by type (step S100). Then, the selected and separated waste foundry sand and waste concrete are crushed to a certain size, that is, the waste foundry sand is crushed to the same size as the grain of sand, and the waste concrete is crushed to a size of 25 mm or less (step ST110). The debris and waste concrete are then removed by regeneration. Here, it is preferable that the waste foundry sand is recycled from raw anticorrosive yarn.

In this way, a predetermined ratio of yarn (natural sand) is blended with the waste foundry sand in which the pulverized and foreign matters are removed through the crushing operation and the regeneration process and the pulverized waste foundry sand in the concrete (step S120). It is preferable that the compounding ratio of the said waste foundry yarn and a yarn shall be 3: 7 weight ratio. As such, the waste casting sand and the yarns are screened by mixing the paddle aggregate mixed with the weight ratio of 3 to 7 and the waste gravel of the sorted and pulverized waste concrete by screens having meshes of a predetermined standard, that is, the particle size distribution is sand grains. After the waste casting aggregate and the particle size distribution of the waste gravel having a particle size of 25mm or less (aggregate maximum size) are sorted, the first and second hoppers 100 and 101 are respectively injected and sorted into fine cement, and the third hopper 102 (Step S130).

The waste casting aggregate stored in the first hopper 100 and the waste gravel and cement stored in the second and third hoppers 101 and 102 have a specific ratio, for example, concrete having a strength of 210-220 kg / cm 2. 39% by weight of the waste casting aggregate, 14% by weight of cement, and 40% by weight of waste gravel having a particle size distribution of 25 mm or less are transported through the first to third conveyor belts 104 to 106 for manufacturing. (Step S140). The transferred waste casting aggregate, waste gravel, and cement are combined in the main conveyor belt 107 and then administered to the mixer 109.

On the other hand, after diluting the water 6% by weight of the total weight and the admixture 1% by weight of the total weight from the water tank 103, it is supplied to the mixer 109 through the supply pipe 107.

In the mixer 109, the supplied waste casting aggregate 39% by weight, waste concrete 40% by weight and 14% by weight of cement are sufficiently stirred and mixed with the admixture and water diluted in the water tank 103 (step S150). After it is administered to the storage tank 110 (step S160).

In this way, the waste casting aggregate, waste gravel, cement, water, and admixture are mixed at a predetermined mixing ratio, that is, 39% by weight of waste casting aggregate, 40% by weight of waste gravel, 14% by weight of cement, 6% by weight of water, and 1% by weight of admixture. By mixing with sufficient stirring at 109, the mixture is discharged to the storage tank 110 to produce concrete having a strength of 210-220 kg / cm 2. Here, the size of the waste casting aggregate and waste gravel can be used differently depending on the purpose of construction, that is, the base aggregate for road pavement, the aggregate for floor pavement of a building, or as the aggregate such as the wall and the slab. You can also change the intensity.

And the ready-mixed concrete stored in the storage tank 110 is weighed to a predetermined weight and loaded into the ready-mixed concrete vehicle through the outlet 111, and then shipped to the road repair or concrete facility site (step; S170) road paving (walkway, bicycle road, square) It is used as a base aggregate for paving, parking lot, alley pavement), or as a pavement aggregate for building floors (especially parking lot buildings), or aggregates such as walls and slabs.

On the other hand, as a comparative example, unlike the conventional technology, that is, to manufacture the road paving or floor paving concrete using natural sand and gravel and cement, the present invention is an industrial waste produced by smelting, production process, etc. of each company It can be seen that the waste aggregate generated during the dismantling of various waste foundry sand and concrete structures is recycled to the floor paving or road paving ready-mixed concrete.

In this result, according to the present invention, by recycling various waste foundry sand and waste aggregates generated at the time of dismantling the concrete structure in each company to be reclaimed into the floor paving concrete, thereby maximizing utilization of waste resources and minimizing environmental pollution Of course, by using the waste foundry sand and waste aggregate as a material for the production of ready-mixed concrete it can be seen that the road and floor damage caused by the improvement of durability does not occur and the difficulty of the landfill is solved.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

According to the method and the composition of the ready-mixed concrete using the waste foundry sand and the aggregate of the present invention, which is apparent from the above description, the utilization of the waste resources by recycling the waste foundry sand and the waste aggregate which are industrial wastes into road paving or concrete for building floors It is maximized, minimizing environmental pollution and eliminating landfill difficulties, as well as contributing to the production cost reduction of the manufacturing company.

Claims (3)

delete delete Cement, 14% by weight of the total weight; A puddle aggregate of 39% by weight in which the particle size distribution is pulverized to the same size as the grains of sand and the yarn is mixed in a 3: 7 weight ratio; 40% by weight of waste aggregate whose waste concrete is separated by type and size, and whose particle size distribution is crushed to a size of 25 mm or less; Admixture that is 1% by weight based on the total weight; And The composition of the ready-mixed concrete using waste foundry sand and waste aggregate, characterized in that the mixture is made of water 6% by weight based on the total weight.

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