KR20240072517A - Method for manufacturing porous concrete aggregate using recycled plastic - Google Patents

Abstract

The method for producing resource recycling material using waste cement and waste plastic according to the present invention includes the steps of pulverizing pretreated waste plastic, pulverizing waste cement sludge into particles of a predetermined size or less, pulverized waste plastic and pulverized waste. It includes the step of mixing cement, putting the mixed waste plastic and waste cement into the extruder hopper and melting it in the cylinder.

Description

Method for manufacturing porous concrete aggregate using recycled plastic }

The present invention relates to a method for manufacturing resource-recycling materials using recycled plastic and a method for manufacturing porous concrete aggregates including the same.

Since the cement industry is a national key industry, demand is subject to fluctuations depending on industrial growth and economic conditions, especially in developing countries, and production is expected to remain at the current level.

As of 2019, greenhouse gas emissions from the domestic cement industry amounted to 39 million tons, accounting for 10% of the total industry emissions as of 2019, and 5.6% of the total domestic emissions, making it urgent to come up with ways to reduce carbon emissions.

Additionally, the cement industry is conducting research to achieve carbon neutrality through replacement of limestone and cement circular fuel.

In addition, continuous noise is becoming a problem these days when apartment construction is at its peak. Various auxiliary materials are being released to prevent such inter-floor noise, but they cannot be a direct solution. Accordingly, it became necessary to develop salt reduction technology, one of the biggest technological elements for cement companies.

The purpose of the present invention is to provide a circular material and a manufacturing method that can reuse resources by utilizing waste cement and waste plastic to prevent environmental pollution.

Additionally, the purpose of the present invention is to provide a manufacturing method that can use waste plastic such as recycled PET when producing concrete aggregate.

Another object of the present invention is to provide a method for producing porous concrete aggregate for noise reduction and a concrete aggregate produced through the method.

According to an embodiment of the present invention to achieve the above object, a method for manufacturing a resource recycling material using waste cement and waste plastic includes the steps of pulverizing waste plastic that has been pretreated by removing impurities; Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less; Mixing the pulverized waste plastic and the pulverized waste cement; Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder; It includes, wherein the step of pulverizing the waste plastic further includes producing the pulverized waste plastic into a pellet form through extrusion.

In one embodiment, the predetermined size of the pulverized waste cement is 5.0 um or less, and the step of pulverizing the waste cement sludge further includes manufacturing the pulverized waste cement sludge into a pellet form through extrusion. .

In one embodiment, in the mixing step, the pulverized waste plastic and the pulverized waste cement are mixed using a screw-type mixer or a rotary mixer.

In one embodiment, the mixing step is performed by mixing the pulverized waste plastic and the pulverized waste cement into a pellet form through extrusion.

According to another embodiment of the present invention, a method for producing porous concrete aggregate includes the steps of pulverizing waste plastic that has been pretreated by removing impurities; Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less; Mixing the pulverized waste plastic and the pulverized waste cement; Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder; Injecting the molten mixture into an aggregate mold; and cooling the aggregate formed in the mold; Including, in the step of pulverizing the waste plastic, the pulverized waste plastic is manufactured into a pellet form through extrusion.

In one embodiment, the aggregate mold is formed to form a tunnel gate by processing a portion of the area near the lower parting line at a right angle, and processing the lower extraction pin to be shorter than the shape to secure a space for inserting an undercut.

According to another embodiment of the present invention, a resource recycling material utilizing waste cement and waste plastic includes the steps of pulverizing waste plastic that has been pretreated by removing impurities; Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or smaller; Mixing the pulverized waste plastic and the pulverized waste cement; And injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder; It is manufactured through a process that includes, and the step of pulverizing the waste plastic further includes manufacturing the pulverized waste plastic into a pellet form through extrusion.

In one embodiment, the predetermined size of the pulverized waste cement is 5.0 um or less, and the step of pulverizing the waste cement sludge further includes manufacturing the pulverized waste cement sludge into a pellet form through extrusion. .

In one embodiment, in the mixing step, the pulverized waste plastic and the pulverized waste cement are mixed using a screw-type mixer or a rotary mixer.

According to another embodiment of the present invention, the porous concrete aggregate includes the steps of pulverizing waste plastic that has been pretreated by removing impurities; Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less; Mixing the pulverized waste plastic and the pulverized waste cement; Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder; Injecting the molten mixture into an aggregate mold; and cooling the aggregate formed in the mold; It is manufactured through a process that includes, and the step of pulverizing the waste plastic further includes manufacturing the pulverized waste plastic into a pellet form through extrusion.

According to the method of manufacturing resource recycling material using waste cement and waste plastic according to the present invention, waste cement and waste plastic can be used, preventing environmental pollution by preventing waste cement and waste plastic from being discarded, and creating a reusable circular material. Materials can be provided.

In addition, according to the porous concrete aggregate and the method for producing porous concrete aggregate according to the present invention, waste plastics such as recycled PET can be used when producing concrete aggregate, which has the effect of obtaining eco-friendly elements in concrete through the development of environmentally-reduced aggregate. .

In addition, according to the porous concrete aggregate and the method for producing porous concrete aggregate according to the present invention, a large number of irregular spaces are created in the aggregate through an eco-friendly porous structure, and this has the effect of trapping and attenuating various elements such as sound and noise in these irregular spaces.

Figure 1 is a flowchart showing a method for manufacturing a resource-recycling material using waste cement and waste plastic and a method for manufacturing porous concrete aggregate including the same according to an embodiment of the present invention.
Figures 2a and 2b show thermal analysis results of raw materials, waste cement, and waste plastic mixtures, respectively.
Figure 3 schematically shows the structure of an injection mold modified for application of the aggregate manufacturing method according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle of definability, it must be interpreted with meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, various alternatives are available to replace them. It should be understood that equivalents and variations may exist.

Climate change is the greatest risk factor threatening human survival. Climate change is causing enormous social and economic losses throughout the world. To this end, the international community is taking strategic action to combat climate change.

The international community regarded climate change as a threat to human survival and took immediate action, including establishing an international carbon neutral regime, urging each country to become carbon neutral, and imposing sanctions such as carbon border taxes on those who did not participate in carbon reduction.

In addition, resource circulation means 'extraction ??' globally. production ?? Consumption ?? This means converting the 'disposal' structure into a circular system, using limited natural resources as little as possible while reintroducing waste into the production process as much as possible.

The period it takes for plastic to completely decompose ranges from 200 to 300 years to as long as 500 years, which means that all products have not decomposed since 1868, when plastic was first produced. The use of plastic has increased rapidly since the 1950s, and according to a study by the United Nations Environment Program (UNEP), a minimum of 4.8 million tons and a maximum of 12.7 million tons of plastic waste flowed into the sea in 2010 alone. The North Pacific Garbage Island, discovered in 1997, had nearly doubled in size by 2009, becoming seven times the size of the Korean Peninsula, and in 2017, an additional garbage island 1.5 times the size of Texas was discovered in the South Pacific. Such environmental pollution not only destroys the ecosystem, but also consumes funds and manpower for purification, resulting in great losses, so materials that can replace it are needed.

Meanwhile, as mentioned earlier, the cement industry is a national key industry, so it is a field where demand changes depending on industrial growth and economic conditions, especially those in developing countries, and production is expected to remain at the current level. In addition, greenhouse gas emissions from the domestic cement industry are 39 million tons (19 years), accounting for 10% of the total industry emissions and 5.6% of the total national debt emissions as of 2019, and there is an urgent need to come up with a plan to reduce carbon emissions.

Additionally, the cement industry is conducting research to achieve carbon neutrality through replacement of limestone and cement circular fuel. Cement companies in leading countries are developing and applying various measures to reduce greenhouse gases, and are investing in and researching low-carbon emission and CO2-absorbing cement concrete technology.

Accordingly, the present invention seeks to propose a new aggregate for concrete mixing that is environmentally friendly and effective in preventing noise in apartments.

Aggregate refers to materials such as sand or gravel used to make concrete or mortar. For convenience, aggregates can be divided into coarse aggregates and fine aggregates with a 5mm boundary depending on their size. The collection law for aggregates is being established for the purpose of smooth supply and demand and to prevent disasters caused by aggregate collection.

These aggregates must be clean, contain no harmful substances, have strong physical durability, have a strong structure, and have a high density. It is also required to have high chemical stability. In addition, although the aggregate has a cubic or ball shape, the surface must not be smooth, it must have an appropriate particle size to reduce voids, and it must have strong abrasion resistance and fire resistance.

It is proposed that the aggregate for concrete mixing according to the present invention is manufactured using cement waste and plastic waste, which must be included by law when mixing concrete.

Figure 1 is a flowchart showing a method for manufacturing a resource-recycling material using waste cement and waste plastic and a method for manufacturing porous concrete aggregate including the same according to an embodiment of the present invention.

In Figure 1, a resource recycling material manufacturing method using waste cement and waste plastic is explained, and among them, a method of manufacturing porous concrete aggregate through an additional process is explained.

Referring to Figure 1, the method for producing porous concrete aggregate according to the present invention includes a waste plastic grinding step (S110), a waste cement sludge grinding step (S120), a step of introducing waste plastic and waste cement into an extruder hopper (S130), and melting. It includes the step of injecting the mixture into a mold (S140) and the step of cooling the aggregate in the analog mold (S150).

First, in the waste plastic crushing step (S110), impurities are removed and the pretreated waste plastic is pulverized.

In order to smoothly recycle waste plastic, it is necessary to separate waste plastic into each material, for example, PP, PET, and vinyl. In addition, due to the characteristics of the aggregate product according to the present invention, the color or appearance of the waste plastic is not a major problem, but since the quality must be maintained, a process of separating waste plastic by type is essential. If waste plastics of different properties are mixed and injected, problems such as cracks or surface peeling may occur in the product during injection, and if impurities such as paper stickers are introduced, it may cause cracks in the product or block the mold gate or injection machine nozzle during the production process. There is a risk of reducing productivity. Therefore, in this step, pretreatment processes for waste plastic, such as separation by type and removal of impurities, are performed.

In order to recycle waste plastic, waste plastic must be pulverized to the extent that it can be put into an extruder. At this time, either a high-speed shredder or a low-speed shredder can be used. However, in the case of high-speed shredding, the grinding amount per hour is superior to that of the low-speed shredder, but dust is generated. Because this problem is so severe, it is preferable to use a low-speed grinder.

Meanwhile, the step of pulverizing waste plastic (S110) may include an additional process of manufacturing the pulverized waste plastic into pellet form through extrusion. This is manufactured in the form of pellets using extrusion because the additives are not mixed uniformly when put directly into the extruder hopper in the form of a powder.

In the waste cement sludge grinding step (S120), the waste cement sludge is dried for a predetermined time and then the waste cement sludge is pulverized into particles of a predetermined size or less. At this time, the pulverized waste cement sludge is preferably 5 um or less, and preferably 2.5 um or less.

In the case of waste cement sludge, it is not suitable for direct use as an aggregate material because it contains large particles of gravel and a large amount of moisture used during cement mixing. Therefore, the pretreatment process for waste cement sludge is very important. First, a drying pretreatment process is required to filter out large-sized gravel and then reduce the moisture content to a level that allows injection. In addition, since the sludge becomes lumpy during the drying process, an additional grinding process is required.

In the step of pulverizing the waste cement sludge (S120), an additional process of manufacturing the pulverized waste cement sludge into pellet form through extrusion may be performed. In this case as well, if the waste cement is put directly into the extruder hopper in the form of powder, the additives are not mixed uniformly, so it is manufactured in the form of pellets using extrusion.

Meanwhile, in step S120, in order to recycle the waste cement sludge, the waste cement sludge must be pulverized to a predetermined size so that it can be fed into the extruder. However, for pulverizing lumpy cement sludge, the discharged particles are somewhat thick so that they can be pulverized into smaller particles. Should be. Accordingly, in the present invention, impurities such as pebbles and coarse particles are first filtered out from the waste cement sludge through a filtration device and then entered into the grinding process.

Meanwhile, in the grinding process, either a high-speed grinder or a low-speed grinder can be used. In the case of high-speed grinding, the grinding amount per hour is superior to that of a low-speed grinder, but there is a problem in that dust generation is very severe, so it is preferable to use a low-speed grinder.

In order to manufacture spherical aggregates or specimens of special shapes through a separate mold, a process of mixing pellet-shaped chips and sludge, extruding them into filament form, and grinding them again is required. However, there is a problem of low mutual affinity due to the different surface energy of the general-purpose plastic, which is close to hydrophobic, and that of the cement sludge, which is close to hydrophilic. Therefore, during extrusion, the efficiency of the process is reduced, such as when the screw is clogged or sludge comes out in clumps on the extruded filament. Therefore, we use our own equipment, a stone crusher, to pulverize the sludge into fine particles of 2.5μm to expand the contact surface area with the waste plastic in the pellet form. Improved extrusion process was implemented.

In the step of inputting waste plastic and waste cement into the extruder hopper (S130), the pulverized waste plastic and pulverized waste cement are mixed, and the combined waste plastic and waste cement are input into the extruder hopper and melted in the cylinder.

A blender can be used to mix pulverized waste plastic and waste cement with different materials or additives such as pigments. As such a mixer, a screw type mixer or a rotary mixer may be used. Screw-type mixers are suitable for mixing ingredients with similar ratios and are generally large in size, which has the advantage of being convenient for mixing. However, it is difficult to mix powder-type additives with a screw-type mixer. In comparison, the rotary mixer has the advantage of being able to mix powder-type additives evenly, but has the disadvantage of having to manually repeat the process of inserting and discharging the ingredients due to its small size.

Meanwhile, even in this mixing step, a process of mixing the pulverized waste plastic and the pulverized waste cement and producing them in the form of pellets through extrusion may be added.

Then, the blended waste plastic and waste cement mixture is put into the extruder hopper and melted in the cylinder.

Meanwhile, a point to be considered for cement sludge fusion injection is that when using talc, a component of existing stone powder, it is desirable to add a stabilizer other than a plasticizer so that it mixes well with plastics of different properties and does not lower the strength too much. Additionally, cement sludge also has different properties from plastic, so it is advisable to add an appropriate plasticizer or stabilizer.

In general, in the case of plastic additives, additives that affect color are not used except under special circumstances. This is because the use of cement sludge as an additive is limited due to its color.

Meanwhile, in the present invention, when waste plastic, waste cement, or a mixture thereof is mixed and used without pelletizing, there is a risk of scattering due to the nature of the powder, so a dust collection facility was installed to prevent the powder from leaking out from the extruder hopper.

In addition, in the present invention, productivity was improved by additionally constructing a device that can collect the dropped products after injection into gunny bags or tone bags through a conveyor, etc.

The waste cement sludge powder pulverized into fine particles at this stage is mixed with pellet-shaped plastic chips and weight fertilizer and supplied to the extruder hopper. The melting temperature of general-purpose plastics, excluding engineering plastics, generally does not exceed 200℃, but in order to create an environment such as liquid mixing that is efficient for the dispersion of inorganic particles such as cement sludge, the temperature condition in the screw chamber is set to 260℃~270℃. The melted waste plastic was made into a state with very low viscosity. In addition, due to the different surface energy between waste cement sludge and waste plastic, the longer it stays in the screw, the more the sludge tends to clump together, and the screw speed of the extruder is set to a relatively high speed of about 45 rpm to minimize the tendency for plastic to clump together. and extrude it.

In addition, the extruded product, which is a mixture of waste cement sludge and waste plastic extruded at a high speed at a high temperature, is still not completely crystallized due to the remaining high temperature. In other words, since it is not completely solidified, the inside of the extrudate has a certain degree of flowability. This means that the waste cement sludge dispersed in the form of fine particles is fluid and can cause agglomeration, so the waste cement for the extrudate is In order to achieve excellent dispersion of sludge, a quenching process is applied by applying cold wind of about 7 to 10°C to the waste cement sludge/waste plastic extrudate extruded from the nozzle to quickly form crystallization.

The quenching process may cause heat shrinkage of the extruded product due to rapid crystallization, but since this is a prior step to the grinding process for the injection or pelletizing filament re-extrusion process, even if it is carried out, it has an effect on morphological characteristics such as shape stability of the final finished product. It is okay to do so.

In the step of injecting the molten mixture into the mold (S140), the molten mixture is injected into the aggregate mold in the cylinder and injected.

The waste cement sludge/waste plastic extrudate that is pulverized to the optimal size through a grinder goes through a re-extrusion process for injection or pelletization for finished products. Among them, the temperature setting for the injection process is one of the very important condition values, which has a great influence on the uniformity of the finished product shape and the molding of the specimen size for accurate physical property measurement.

Waste plastic extrudate mixed with waste cement sludge has a melting temperature that is on average 30°C higher than that of pure waste plastic.

Therefore, the temperature inside the injection screw chamber is set to about 20℃ higher than the melting point of existing raw material waste plastic to ensure flowability suitable for molding, and the temperature of the nozzle just before injection is set to about 35℃ to instantaneously increase moldability suitable for injection. At the same time, it minimizes the residual heat after injection and minimizes heat shrinkage in the final finished product.

Figures 2a and 2b show the results of thermal analysis of raw materials, waste cement, and waste plastic mixtures, respectively.

Figure 2a shows the results of thermal analysis (DSC) of waste plastic raw materials (chips). It can be seen that Tm: 129.80℃, Tc: 109.42℃, showing the thermal behavior of general waste plastic, and Figure 2b shows waste cement and waste plastic. It shows the results of thermal analysis (DSC) of the plastic mixture. It can be seen that an endothermic peak presumed to be Tg is formed as Tm: 163.80℃, Tg: 123.86℃, Tc: 112.28℃. In addition, the biggest peculiarity is that the Tm of the sample increased due to the addition of sludge.

That is, referring to Figures 2a and 2b, DSC was analyzed under inert gas conditions for waste plastic raw materials (chips) and PLAAMENT (waste cement mixture / waste plastic), and as a result of the analysis, compared to existing waste plastic, waste cement sludge was stirred. It was confirmed that Tm increased in PLAAMENT.

Since waste cement sludge is an inorganic material, it has no Tm. Even if it does have Tm, it is common for two Tm peaks to occur each when there is no compatibility between different materials. However, the analysis results showed that Tm increased by about 30~40℃ as the waste cement sludge was stirred, which means that specimens made of PLAAMENT can be expected to exhibit better physical properties than specimens made of existing waste plastic.

In addition, in the present invention, a new mold design was designed for mass production type spherical design as a mold for injecting the molten mixture.

First, various prototypes were produced using a 3D printer, and then the optimal mold structure for cement aggregate injection was created through mold design.

Figure 3 schematically shows the structure of an injection mold modified for application of the aggregate manufacturing method according to the present invention.

The left side of Figure 3 is a mold structure for an existing spherical injection molded product. Referring to the drawing on the left, in the case of a completely spherical injection mold, due to the structure of the mold, air can flow into the lower part of the mold due to the ejection pin, and because it is difficult for air to flow between the mold surface and the injection material on the upper side of the mold, when the mold is opened, the product sticks to the upper side of the mold. There may be cases where it is thrown away.

In addition, even if the pins are placed equally on the upper side of the mold, there is a problem that air is easily introduced into the lower side of the mold due to the mold structure.

For general products, an undercut is applied to the bottom of the mold to roughen up a portion of the product to attach it to the bottom of the mold. However, if the inner shape of the mold is spherical, undercut processing is meaningless.

Additionally, due to the nature of the shape, only direct injection side gates are possible, so the product must be separated from the runner by hand or by manufacturing a dedicated jig, which reduces productivity.

To solve this problem, the present invention used a mold of the type shown on the right side of Figure 2.

Referring to the right side of Figure 2, a shape for a tunnel gate was created on the lower side of the mold, and an extraction pin for undercut was machined shorter than the shape. In other words, if a tunnel gate is adopted by machining part of the area near the parting line on the lower side of the mold to a right angle, the tunnel gate itself acts as an undercut and helps solve the bite of the upper side of the mold. In addition, the take-out pin at the bottom of the mold is processed slightly shorter than the shape to secure space for undercuts.

At this time, it is necessary to select the tunnel gate size considering the particle size of the waste cement. This is because if a commonly used tunnel gate size is used, the gate may be blocked when waste cement, which has slightly larger particles, is mixed in, which may reduce productivity.

If the particle size is larger than expected, it may be difficult to use a tunnel gate, so it may be necessary to use a valve gate, etc.

During the post-treatment process after injection, when sufficiently mixed materials are fed into the hopper during injection, there is a possibility that cement sludge with small particles may collect downward due to differences in particle size and vibration of the extruder, so it is necessary to prevent this. Additionally, if necessary, a hopper smaller than the commonly used hopper or a hopper placed separately rather than installed in the extruder may be adopted.

Meanwhile, it is preferable to prepare a dedicated nozzle and use a nozzle with a larger exposed hole than a generally used nozzle in consideration of the waste cement powder that has not been melted in the extruder cylinder.

On the other hand, due to the non-meltable nature of cement, it becomes a factor that impedes flowability, requiring higher pressure in the extruder cylinder. If flowability is too low, the product may not be molded sufficiently, or burrs may exceed the allowable limit. If it comes out, it may cause a defect. Accordingly, in order to facilitate molding in a mold, it is desirable to have appropriate flow properties.

And in the final step S150, the aggregate is cooled within the analog mold to complete the aggregate.

As such, in the present invention, an aggregate for zero waste concrete mixing is developed by applying a fusion injection molding technique of heterogeneous materials using waste plastic and waste cement sludge, and the fusion design of waste plastic and waste cement materials, flame retardancy and impact Strength properties were secured and dissimilar material injection technology was secured.

Meanwhile, based on the physical properties data obtained through the porous concrete aggregate manufacturing method according to the present invention, it can be applied to product groups other than plastic aggregates. For example, it can be mainly applied to building materials that are not exposed to the outside after construction is completed.

The method for producing porous concrete aggregate according to the present invention was tested in a field test on a prototype through an agreement with Sanha Industries Co., Ltd.

First, concrete mixed with aggregate was produced, and aggregate and admixture were mixed to set a target mixing ratio for concrete with final lightweight characteristics emphasized.

Concrete is generally manufactured with cement, sand, and gravel in a ratio of 1:3:6, and gravel, which accounts for 60% of the total weight, is replaced with artificial aggregate manufactured by mixing waste plastic and waste cement sludge using this developed technology. Thus, environmentally friendly elements and lightweight characteristics were secured at the same time.

According to the method of manufacturing resource recycling material using waste cement and waste plastic according to the present invention, waste cement and waste plastic can be used, preventing environmental pollution by preventing waste cement and waste plastic from being discarded, and creating a reusable circular material. Materials can be provided.

In addition, according to the porous concrete aggregate and the method for producing porous concrete aggregate according to the present invention, waste plastics such as recycled PET can be used when producing concrete aggregate, which has the effect of obtaining eco-friendly elements in concrete through the development of environmentally-reduced aggregate. .

In addition, according to the porous concrete aggregate and the method for producing porous concrete aggregate according to the present invention, a large number of irregular spaces are created in the aggregate through an eco-friendly porous structure, and this has the effect of trapping and attenuating various elements such as sound and noise in these irregular spaces.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the claims to be described.

Claims (10)

In the method of manufacturing resource-recycling materials using waste cement and waste plastic,
A step of pulverizing the pretreated waste plastic by removing impurities;
Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less;
Mixing the pulverized waste plastic and the pulverized waste cement;
Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder;
Includes,
The step of pulverizing the waste plastic further includes the step of manufacturing the pulverized waste plastic into a pellet form through extrusion.
According to claim 1,
The predetermined size of the pulverized waste cement is 5.0um or less,
The step of pulverizing the waste cement sludge,
A method for manufacturing a resource-recycling material using waste cement and waste plastic, further comprising the step of manufacturing the pulverized waste cement sludge into a pellet form through extrusion.
According to claim 1,
The mixing step is a resource recycling material manufacturing method using waste cement and waste plastic, characterized in that the pulverized waste plastic and the pulverized waste cement are mixed using a screw-type mixer or a rotary mixer.
According to clause 3,
The mixing step is a resource recycling material manufacturing method using waste cement and waste plastic, characterized in that the pulverized waste plastic and the pulverized waste cement are mixed and manufactured into a pellet form through extrusion.
In the method of producing porous concrete aggregate,
A step of pulverizing the pretreated waste plastic by removing impurities;
Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less;
Mixing the pulverized waste plastic and the pulverized waste cement;
Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder;
Injecting the molten mixture into an aggregate mold; and
Cooling the aggregate formed in the mold;
Includes,
The step of pulverizing the waste plastic further includes the step of manufacturing the pulverized waste plastic into a pellet form through extrusion.
According to clause 5,
The aggregate mold is a tunnel gate formed by processing a portion of the area near the lower parting line at a right angle, and the lower extraction pin is processed to be shorter than the shape to secure a space for inserting an undercut. A method of producing porous concrete aggregate.
In resource recycling materials using waste cement and waste plastic,
A step of pulverizing the pretreated waste plastic by removing impurities;
Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less;
Mixing the pulverized waste plastic and the pulverized waste cement; and
Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder;
It is manufactured through a process that includes,
The step of pulverizing the waste plastic further includes the step of manufacturing the pulverized waste plastic into a pellet form through extrusion. A resource recycling material utilizing waste cement and waste plastic.
According to clause 7,
The predetermined size of the pulverized waste cement is 5.0um or less,
The step of pulverizing the waste cement sludge,
A resource recycling material utilizing waste cement and waste plastic, further comprising the step of manufacturing the pulverized waste cement sludge into pellet form through extrusion.
According to clause 7,
The mixing step is a resource recycling material utilizing waste cement and waste plastic, characterized in that the pulverized waste plastic and the pulverized waste cement are mixed using a screw-type mixer or a rotary mixer.
In porous concrete aggregate,
A step of pulverizing the pretreated waste plastic by removing impurities;
Drying the waste cement sludge for a predetermined time and then pulverizing the waste cement sludge into particles of a predetermined size or less;
Mixing the pulverized waste plastic and the pulverized waste cement;
Injecting the mixed waste plastic and waste cement into an extruder hopper and melting them in a cylinder;
Injecting the molten mixture into an aggregate mold; and
Cooling the aggregate formed in the mold;
It is manufactured through a process that includes,
The step of pulverizing the waste plastic further includes the step of manufacturing the pulverized waste plastic into a pellet form through extrusion.

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