KR20230129945A - Manufacturing method of high-strength reinforced soil retaining wall block for civil engineering using waste plastic - Google Patents

Abstract

The present invention relates to a method of manufacturing high-strength reinforced earth retaining wall blocks for civil engineering using various waste plastics that are difficult to recycle, and more specifically, by dissolving low-grade waste plastics such as waste vinyl, waste Styrofoam, waste synthetic resin, and medical waste plastic at a certain high temperature. This relates to a manufacturing method of high-strength reinforced soil retaining wall blocks for civil engineering.
To achieve this, the present invention,
In the manufacturing method of high-strength reinforced soil retaining wall blocks for civil engineering using waste plastic,
A waste plastic recovery stage in which waste vinyl, waste Styrofoam, waste synthetic resin, medical waste plastic, and low-grade waste plastic are collected from various sources;
A washing step of cleaning the waste plastic collected in the waste plastic recovery step to remove impurities or contaminants;
A sorting step performed by having a sorting function to classify and separate the various waste plastics that have gone through the washing step;
A dissolution step in which the waste plastic selected through the washing and sorting steps is melted at a constant high temperature in a dissolution chamber, and the temperature and duration of the melting process are applied differently depending on the type and quality of the waste plastic;
In the melting step, an injection molding step of producing a high-strength reinforced soil retaining wall block by injecting the molten plastic into molds formed in various designs, shapes, and sizes after the melting process;
A cooling step of cooling the block after injection molding by the injection molding step; and
It provides a method of manufacturing a high-strength reinforced soil retaining wall block for civil engineering using waste plastic, comprising an inspection step of inspecting the block that has undergone the cooling step to determine whether it meets the required specifications.

Description

Manufacturing method of high-strength reinforced soil retaining wall block for civil engineering using waste plastic}

The present invention relates to a method of manufacturing high-strength reinforced earth retaining wall blocks for civil engineering using various waste plastics that are difficult to recycle, and more specifically, by dissolving low-grade waste plastics such as waste vinyl, waste Styrofoam, waste synthetic resin, and medical waste plastic at a certain high temperature. This relates to a manufacturing method of high-strength reinforced soil retaining wall blocks for civil engineering.

In general, reinforced soil retaining wall blocks are precast concrete blocks used in retaining wall construction. These blocks are designed to interlock together to create a stable, durable structure that can hold down soil and prevent erosion.

Blocks are usually made of high-strength concrete and reinforced with steel bars or fibers. Provides additional strength and stability. They come in a variety of sizes and shapes to suit a variety of uses and can be customized to suit specific project requirements.

Reinforced soil retaining wall blocks are installed by first excavating a trench for the base course of the block. . The blocks are then placed in the trench, leveled, and the base course set slightly back to form dough. The blocks are then fitted together and backfilled with soil to create a stable structure that can resist the lateral pressure of the soil behind it.

Reinforced soil retaining wall blocks are commonly used in highway and railway construction, slope stabilization and landscaping projects. It provides a cost-effective and efficient solution for retaining walls and offers the added benefits of durability, low maintenance and easy installation.

The latest trend in reinforced soil retaining wall blocks is the use of innovative materials and designs that improve the performance and aesthetics of the wall system. The latest trends in reinforced soil retaining wall blocks are as follows:

Sustainable materials: There is a growing trend to use sustainable and environmentally friendly materials for retaining wall blocks. With recycled plastic or composite materials. These materials not only have a lower environmental impact, but also offer improved durability and longevity.

Retaining wall blocks are now available in a variety of designs and colors, allowing architects and engineers to create walls that blend in perfectly with their surroundings. Newer designs incorporate textures, patterns, and even flower pots to enhance the aesthetic appeal of walls.

Modern retaining wall blocks are designed to provide improved performance and stability. , Ideal for use in high load applications or areas with challenging soil conditions. The blocks are designed to maximize load bearing capacity and minimize the need for extensive foundation work.

Modular retaining wall block systems are faster and easier to install than traditional retaining walls. These systems use stackable interlocking blocks to create walls of any height and can be easily customized to suit the specific needs of a site.

Some retaining wall blocks now incorporate sensors and monitoring systems to detect movement, changes in soil conditions and other factors that can affect the stability of the wall. This technology provides early warning signals of potential failures and enables timely repairs or improvements.

Overall, the latest trends in reinforced soil retaining wall blocks focus on improving performance. Easier and more cost-effective to install and maintain.

Looking at conventional patent technologies related to retaining walls, Korea Patent No. 10-0919755 (September 24, 2009) states that the body, middle, and wings are formed integrally, and each of the body and middle has an upper, In a block for constructing a reinforced earth retaining wall in which a first fill hole and a second fill hole are penetrated downward and filled with soil or gravel, the bottom of the body portion allows rainwater that seeps into the back fill soil after construction of the reinforced earth retaining wall to the front of the constructed blocks. In order to allow discharge, a drain is formed extending from the first filling hole to the front of the body, and in the middle part, cement mortar is used to bind the blocks built above and below and improve the binding strength of the grid reinforcement. The mortar pouring hole for block binding is formed to penetrate upward and downward so as to communicate with the grid binding groove on the bottom of the block, and the mortar pouring hole for block binding and the grid binding groove are filled with cement mortar. Blocks for constructing reinforced earth retaining walls are known.

In addition, Korean Patent No. 10-1116393 (February 7, 2012) discloses a block for a reinforced soil retaining wall stacked on filled land or cut land, including a concrete body portion; And, an exterior part made of a material different from that of the concrete body and detachably coupled to the front of the concrete body, wherein the front and rear portions of the concrete body are formed to be symmetrical, and the front and rear portions of the concrete body are formed to be symmetrical. A block for a reinforced earth retaining wall is known, characterized in that at least one locking groove and a locking piece that are coupled to each other are formed on the rear portion and the rear portion of the exterior portion, respectively.

However, although reinforced soil retaining wall blocks are a widely used solution for soil stabilization and retaining wall structures, they may face certain challenges. Some problems with reinforced soil retaining wall blocks are as follows:

The design of reinforced earth retaining wall blocks requires adequate drainage to prevent water from accumulating behind the wall. This leads to hydrostatic pressure and wall failure. Insufficient drainage may cause moisture to accumulate and corrode the reinforcement.

The load of retaining walls can cause soil settlement over time. Even cracks or wall failure. Proper foundation design and compaction are essential to prevent settlement problems.

Reinforced retaining walls are often built on slopes and embankments, which can lead to slope failure due to: Soil erosion or instability. If this is not addressed, the wall may move or even collapse.

In cold climates, moisture in the soil may freeze and expand, causing freeze-thaw. Lift the wall up. This can cause stress to be applied to the retaining wall, causing cracks or damage.

The quality of materials used in reinforced earth retaining wall blocks may vary and may be substandard. Wall failure may occur. It is important to ensure that the materials used meet appropriate standards and are of high quality.

Overall, proper design, construction and maintenance are essential to address these potential problems with reinforcement.

Korean registered patent 10-0919755 (September 24, 2009) Korean registered patent 10-1116393 (February 7, 2012)

To solve the above problems of the present invention, the aim is to create a more sustainable and environmentally friendly solution for soil stabilization and retaining wall structures while reducing plastic waste. By using waste plastic as a raw material, we can provide a high-strength and durable material for retaining walls while reducing the amount of plastic that ends up in landfills or the environment.

Environmental benefits: Using waste plastic in reinforced retaining blocks can provide economic benefits by reducing material costs and potentially lowering construction costs. The high strength and durability of these blocks improve the performance and lifespan of retaining wall structures, reducing the need for frequent maintenance or replacement.

Therefore, the purpose of the present invention is to provide a manufacturing method that includes collection, cleaning, classification, and injection molding of waste plastic.

In order to solve the above problems, the present invention specifies a method of manufacturing a high-strength reinforced soil retaining wall block using waste plastic by melting low-grade waste plastic at high temperature and then forming it into a block, and the specific method includes the following steps.

Waste plastic recovery stage: Low-grade waste plastics such as waste vinyl, waste Styrofoam, waste synthetic resin, and medical waste plastic are collected from various sources.

Washing stage: The collected waste plastic is washed to remove impurities or contaminants.

Sorting stage: A sorting function that can distinguish and separate various waste plastics is required.

Dissolution stage: Washed and selected waste plastics are dissolved at a constant high temperature in a dissolution chamber. The temperature and duration of the melting process depend on the type and quality of waste plastic used.

Injection molding step: After the melting process, molten plastic is injected into the mold to produce high-strength reinforced soil retaining wall blocks. Molds can be of various designs, shapes and sizes.

Cooling stage: Cool the block after injection molding.

Inspection stage: Inspection to ensure that required specifications are met.

A control unit that controls each of the above steps can be configured, and a method of manufacturing a high-strength reinforced soil retaining wall block using waste plastic through these steps is configured as a means of solving the problem.

Engineering by injection molding. By using high-strength reinforced soil retaining wall blocks made from waste synthetic resin during retaining wall construction, carbon emissions generated during the production process of each material that occurs when making blocks from concrete can also be reduced. It is also very effective in preventing environmental pollution caused by landfilling or incineration of waste synthetic resins that are difficult to recycle. The blocks produced are much stronger and last longer than earth retaining blocks reinforced with concrete mix. Additionally, blocks of various designs can be produced through injection molding. Overall, it provides a sustainable and efficient solution for waste plastic management while improving the performance of retaining wall construction.

Figure 1 is a step diagram of the method of manufacturing a high-strength reinforced soil retaining wall block using waste plastic of the present invention.
Figure 2 is a block diagram of a sorting device used in the classification step of the present invention.
Figure 3 is a block diagram of a melting device used in the melting step of the present invention.
Figure 4 is a detailed step diagram of the injection molding step of the present invention.
Figure 5 is a detailed step diagram of the cooling step of the present invention
Figure 6 is a detailed step diagram of the inspection step of the present invention
Figure 7 is a photo of an embodiment of a sorting device
Figure 8 is a photo of a high-frequency sensor operating in an example of a sorting device.
Figure 9 is a photo of an infrared sensor operating in an example of a sorting device.
Figure 10 is a photograph of waste plastic being inspected with a high-frequency sensor after it has been melted.
Figure 11 is an example of a retaining wall block mixed with waste plastic and cement.
Figure 12 is an example of a retaining wall block using waste plastic according to the present invention.
Figure 13 is an example of a retaining wall block using waste plastic according to the present invention.
Figure 14 shows three embodiments of retaining wall blocks using waste plastic according to the present invention.
Figure 15 is a realistic example of a retaining wall block using waste plastic according to the present invention.
Figure 16 is an example of a retaining wall block using waste plastic according to the present invention.
Figure 17 is a six-illustration example of a retaining wall block using waste plastic according to the present invention.
Figure 18 is an example of a retaining wall block using waste plastic according to the present invention.

The present invention,

In the manufacturing method of high-strength reinforced soil retaining wall blocks for civil engineering using waste plastic,

A waste plastic recovery stage in which waste vinyl, waste Styrofoam, waste synthetic resin, medical waste plastic, and low-grade waste plastic are collected from various sources;

A washing step of washing the waste plastic collected in the waste plastic recovery step to remove impurities or contaminants; and

A sorting step performed by having a sorting function to classify and separate the various waste plastics that have gone through the washing step;

A dissolution step in which the waste plastic selected through the washing and sorting steps is melted at a constant high temperature in a dissolution chamber, and the temperature and duration of the melting process are applied differently depending on the type and quality of the waste plastic;

In the melting step, an injection molding step of producing a high-strength reinforced soil retaining wall block by injecting the molten plastic into molds formed in various designs, shapes, and sizes after the melting process;

A cooling step of cooling the block after injection molding by the injection molding step; and

It relates to a method of manufacturing a high-strength reinforced soil retaining wall block for civil engineering using waste plastic, comprising an inspection step of checking whether the block that has passed the cooling step meets the required specifications.

Hereinafter, the present invention will be described in detail through drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the drawings described herein.

Figure 1 is a step diagram of a method of manufacturing a high-strength reinforced soil retaining wall block using waste plastic of the present invention, Figure 2 is a block diagram of a sorting device used in the classification step of the present invention, and Figure 3 is a block diagram of a sorting device used in the dissolution step of the present invention. It is a block diagram of the melting device, Figure 4 is a detailed step diagram of the injection molding step of the present invention, Figure 5 is a detailed step diagram of the cooling step of the present invention, and Figure 6 is a detailed step diagram of the inspection step of the present invention.

First, if we explain with reference to Figures 2 to 6 and summarize Figure 1,

As shown in Figure 2, Figure 2 is a block diagram of a sorting device used in the classification step of the present invention.

The automatic waste plastic sorting device is a device that automatically separates various types of waste plastic collected for recycling and classifies them into pure waste plastic that can be recycled. Since there are various types of waste plastic, such as waste vinyl, waste Styrofoam, and waste medical plastic, an automatic waste plastic sorting device requires the ability to distinguish and separate these various waste plastics.

An automatic waste plastic sorting device may include the following components:

Conveyor belt (210): A belt on which the collected waste plastic is placed, and serves to move the waste plastic within the device.

Infrared camera (220): Used to determine the characteristics of waste plastic. The infrared camera recognizes characteristics such as color, shape, and size of waste plastic and distinguishes each waste plastic.

High-frequency sensor (230): The high-frequency sensor is used to determine the type of waste plastic. This sensor detects and classifies what waste plastic is made of.

Determining plastic composition with high-frequency sensors requires measuring the dielectric properties of the plastic material. Different types of plastics have different dielectric properties that can be measured by high-frequency sensors.

The general steps for determining plastic composition with a high-frequency sensor are as follows:

Calibration: First, the high-frequency sensor must be calibrated to ensure accurate readings. This involves measuring the dielectric properties of a plastic sample, known as a sensor, and using the data to establish a calibration curve.

Sample preparation: You will need to prepare a sample of the plastic to be tested. By cutting them into specific sizes and shapes to fit the sensor.

Measurement of dielectric properties: Once the sample is prepared, it is placed on the sensor and a high frequency signal is applied. The sensor then measures the plastic's response to high-frequency signals based on its dielectric properties.

Data analysis: Decisions are made by analyzing data collected by sensors. Plastic composition. By comparing the dielectric properties of a plastic sample to a calibration curve, the sensor can identify the plastic type and estimate its composition.

It is worth noting that some plastics may have similar properties. Due to their dielectric properties, it can be difficult to accurately determine their composition using only high-frequency sensors. In this case, additional testing may be required to confirm the composition of the plastic sample.

Air separator (240): After separating waste plastic, the separated waste plastic is collected through an air separator.

An air separator is one of the equipment used in the waste plastic recycling process. This equipment separates waste plastic pieces from the air and collects the separated waste plastic.

Air separators come in a variety of sizes and types. Typically, air separators use powerful vibration devices to drop waste plastic. This vibrating device is a mechanical device that separates waste plastic pieces from the air and collects the separated waste plastic.

The air separator may also include a high-pressure air system used to separate waste plastic from the air. This system can separate the separated waste plastic by pushing air towards it.

Air separators are one of the important pieces of equipment used to separate and collect waste plastic in the recycling process. This equipment helps prevent environmental pollution by separating waste plastic, collecting recyclable waste plastic, and processing waste plastic that cannot be reused.

Reaggregator (250): The reaggregator is also called a reaggregator. It is a device that reunites separated waste plastic. In order for waste plastic to be recycled, it must be mixed in a certain ratio, so the reaggregator plays the role of adjusting this ratio.

A reagglomerator is a device used to combine or reagglomerate separated waste plastics into a homogeneous mixture for recycling at a specific rate. This device is used to ensure that recycled plastic materials meet the quality standards required for their intended use.

The reagglomerator consists of a mixing chamber, a feeding system and a control system. Mixing chambers are typically large containers designed to store and mix separated waste plastic materials. A feeding system is typically used to deliver the separated plastic materials to the mixing chamber in desired proportions depending on the type and amount of plastic material used.

The control system mixes waste plastic materials. It consists of sensors and controls that monitor and adjust plastic flow rates and temperatures to achieve the correct ratio and ensure the materials are thoroughly mixed.

The mixing process in a reagglomerator may include a variety of operations. Methods involving mechanical mixing, heating and stirring. Some reagglomerators also incorporate waste plastic materials by constructing special blades inside the mixing chamber to facilitate the mixing process and improve the quality of the final product.

Once the plastic materials are fully mixed, the resulting homogeneous mixture is subjected to downstream processes such as extrusion or injection molding to create new products. Using a reagglomerator ensures that recycled plastic materials are of consistent quality and meet the desired specifications for their intended use.

Overall, reagglomerators are an essential component in the recycling process of waste plastic materials. Waste plastics can be recycled efficiently and effectively by creating homogeneous mixtures in desired proportions, allowing recycled plastics to be used in new products with consistent quality and properties.

Control device 260: The automatic waste plastic sorting device controls all processes with a computer control device. The computer collects data from infrared cameras and high-frequency sensors and automatically controls processes such as classification, separation, and reassembly.

As shown in Figure 3, Figure 3 is a block diagram of a melting device used in the melting step of the present invention.

Washed and selected waste plastics are melted at a certain high temperature to create high-strength reinforced soil blocks. The temperature and duration of the melting process depend on the type and quality of waste plastic used.

For example, melting waste vinyl generally requires a high temperature of 150 to 250 degrees Celsius, which lasts for about 10 minutes. On the other hand, waste Styrofoam melts for about 58 minutes at a temperature of 100 to 200 degrees Celsius, and waste medical plastic melts for 20 to 30 minutes at a high temperature of 200 to 300 degrees Celsius.

Heating means 310: The heating means is an essential component of the device. Used to dissolve waste. It generates the heat needed to melt certain types of waste and maintains the temperature. Depending on the device design, the heating means may be in the form of a heating coil, ceramic heater, or other type of heat source.

Temperature control means 320: The temperature control system is used to monitor and control the temperature of the heating element. The system may include thermocouples or other temperature sensors that measure the temperature of the heating element and send the data to a controller. The controller then adjusts the temperature of the heating element based on input from the sensor to maintain the desired temperature range.

Timer control means 330: The timer control system is used to control the duration. of the melting process. The system may include a timer or programmable logic controller (PLC) that can be set to control the dissolution time for specific wastes.

Melting chamber 340: The melting chamber is a vessel. A place where waste is placed and dissolved. They are typically made of heat-resistant materials and are designed to withstand the high temperatures needed to melt waste.

Exhaust means (350): The exhaust system uses smoke or gas generated during the dissolution process. This system may include a ventilation system, a filter system, or both.

Safety function means 360: Safety features may include emergency stop buttons, overheating protection, and other safety measures. Prevent accidents or equipment damage.

The specific components and design of the device used to melt waste will depend on its intended use, safety standards, and other factors.

High-strength reinforced civil engineering wall blocks manufactured through this process are stronger and last longer than concrete blocks made from waste plastic. In addition, environmental pollution caused by discarding or incinerating waste plastic that is difficult to recycle can be prevented.

Referring to Figure 4, Figure 4 is a detailed step diagram of the injection molding step of the present invention.

Injection molding is a process of manufacturing plastic parts by injecting molten plastic material into a mold cavity under high pressure and then cooling and solidifying the part. This process includes several steps:

Material preparation step 410: The first step in the injection molding process is to prepare the plastic material. Plastic pellets or granules are commonly used and must be dried to a specified moisture level to ensure consistent molding. The plastic is then loaded into the hopper of the injection molding machine.

Injection step 420: The plastic material is heated and melted in the barrel of the injection molding machine and then injected. Mold cavity under high pressure. Molds are designed to produce the desired shape and size of the part.

Cooling and solidification step (430): When the molten plastic material is injected into the mold, it is rapidly cooled and solidified. By circulating water or air through the mold. Cooling time is determined by the material and wall thickness of the part.

Ejection step (440): After the plastic material cools and solidifies, the mold is opened and the part is ejected. in the mold cavity by means of an ejector pin. Then close the mold and repeat the process.

Finishing step (450): Trim excess plastic, remove flash or sprue, drill, tap, or add inserts to the finished part.

Overall, injection molding is a highly automated and precise process that can produce complex, detailed parts with high repeatability and accuracy. This process can be customized to meet specific design requirements and is widely used in a variety of industries, including automotive, aerospace, medical, and consumer goods.

The injection molding device commonly used to manufacture high-strength reinforced soil retaining wall blocks using waste plastic is an injection molding machine.

An injection molding machine creates plastic granules and then injects the molten plastic into a mold to create a specific shape. When manufacturing high-strength reinforced earth retaining wall blocks, plastic pellets are usually made from waste plastic, such as recycled plastic bottles or containers, crushed into small pieces and then melted in an injection molding machine. Once the plastic is melted, it produces retaining wall blocks of the desired shape and size. It is injected into a mold designed to do so. The mold typically contains steel reinforcement bars or mesh used to increase the strength and durability of the block. The molten plastic is cooled and hardened inside the mold, then the mold is opened and the completed retaining wall block is ejected.

Injection molding is a highly efficient and precise manufacturing process that produces quality, consistent products with minimal waste. It is commonly used in the production of a wide range of plastic products, including automotive parts, electronic enclosures, and medical devices, as well as construction and building materials such as retaining wall blocks.

Figure 5 is a detailed step diagram of the cooling step of the present invention.

The cooling phase of the injection molding process is critical to creating high-quality, consistent parts. It involves controlled cooling and solidification of molten plastic material injected into the mold cavity. The cooling stage can be subdivided into several stages:

Mold Fill Step 510: The first part of the cooling step begins immediately after the plastic material is injected. mold cavity. During this stage, the plastic material cools and solidifies at the mold walls, while the material remaining in the center of the mold cavity continues to flow and compress, filling voids and cavities. Pressure in the mold cavity is maintained until the material has solidified sufficiently to prevent deformation or shrinkage.

Pressure maintenance step (520): After the mold is filled and packaged, the cooling and pressure maintenance steps are continued. This step helps ensure that the plastic material is fully packaged and that shrinkage is compensated as the material cools and solidifies.

Cooling rate control step 530: Cooling rate is very important to achieve. High quality parts. If a part cools too quickly, it may warp or crack; if it cools too slowly, it may warp or develop sink marks. The cooling rate can be controlled by mold temperature, cooling channel design, and cooling medium used.

Ejection step (540): When the part cools and solidifies, the mold is opened. Parts are ejected. Parts are usually allowed to cool further before being removed from the machine.

Overall, the cooling step is an important part of the injection molding process for recycling waste plastics. Control the cooling rate to obtain high-quality parts. This process can be customized to meet specific design requirements and is widely used in a variety of industries, including automotive, aerospace, medical, and consumer goods.

Figure 6 is a detailed step diagram of the inspection step of the present invention.

The inspection stage of manufacturing reinforced retaining wall blocks using waste plastic is an important final step to ensure product quality and consistency. The inspection phase can be subdivided into the following steps:

Visual inspection (610): Visually inspect the retaining wall block to ensure that there are no defects such as cracks in the retaining wall block. Or deformity. Any blocks that do not meet the required quality criteria will be rejected.

Dimensional inspection (620): This involves checking that the dimensions of the retaining wall blocks meet the required specifications. Blocks that do not meet the required dimensions are rejected.

Compression test (630): Test the compressive strength of retaining wall blocks to determine whether they can withstand the required load. A sample of blocks is selected and each block is subjected to a compressive load until failure. The compressive strength of the blocks is then compared to the required standards and blocks that do not meet the required standards are rejected.

Durability Test (640): This includes testing the durability of the block. Retaining wall blocks are designed to withstand the effects of weathering and exposure to the elements over time. Select block samples and apply freeze-thaw and wet-dry conditions to each block. The blocks are then inspected for signs of damage or deterioration and any blocks that do not meet the required standards are rejected.

Document review (650): This includes review of documents related to: Manufacturing of retaining wall blocks, including quality control procedures, test results and production records. Identify and resolve any discrepancies or nonconformities.

By following these steps during the inspection phase, the manufacturer can ensure that the soil retaining wall blocks reinforced using waste plastic meet the required quality standards and are suitable for use in construction projects.

Figure 1 is a step diagram of a method of manufacturing a high-strength reinforced soil retaining wall block using waste plastic of the present invention.

As explained in detail above, Figure 1 consists of the following steps.

Washing step (110): The collected waste plastic is washed to remove impurities or contaminants.

Sorting step (120): A sorting function that can distinguish and separate various waste plastics is required.

Dissolution step (130): The washed and selected waste plastic is dissolved at a constant high temperature in a dissolution chamber. The temperature and duration of the melting process depend on the type and quality of waste plastic used.

Injection molding step (140): After the melting process, molten plastic is injected into the mold to produce a high-strength reinforced soil retaining wall block. Molds can be of various designs, shapes and sizes.

Cooling step (150): Cool the block after injection molding.

Inspection step 160: Inspection to ensure that required specifications are met.

As an embodiment of the invention, the ingredient ratios for making retaining wall blocks from waste plastic may vary depending on the specific type of plastic used and the desired properties of the block.

Materials are clean and shredded waste plastic into small pieces, sand or gravel for stability, cement for strength and durability, and water.

Mix shredded waste plastic with sand or gravel in a 1:3 ratio (1 part plastic, 3 parts sand/gravel).

Add cement to the mixture in a 1:3 ratio. Ratio (1 part cement to 3 parts plastic/sand/gravel mixture).

Gradually add water to the mixture, stirring, until you have a uniform consistency you can work with.

Pour the mixture into a mold to achieve the desired size and shape of the retaining wall blocks.

Allow the blocks to dry and cure for a few days before using them.

As described above, Figure 11 shows an example of a retaining wall block mixed with waste plastic and cement. The upper part is a mixed retaining wall block and the lower part is made of cement.

It should be noted that the exact proportions of materials may need to be adjusted depending on the desired properties of the specific type and quality of waste plastic used. Completed block. Additionally, using waste plastics in construction can overcome some limitations and potential drawbacks.

110: Washing step 120: Sorting step 130: Dissolving step 140: Injection molding step
150: Cooling step 160: Inspection step 360: Safety function means
340: Melting chamber 310: Heating means

Claims (1)

In the manufacturing method of high-strength reinforced soil retaining wall blocks for civil engineering using waste plastic,
A waste plastic recovery stage in which waste vinyl, waste Styrofoam, waste synthetic resin, medical waste plastic, and low-grade waste plastic are collected from various sources;
A washing step of cleaning the waste plastic collected in the waste plastic recovery step to remove impurities or contaminants;
A sorting step performed by having a sorting function to classify and separate the various waste plastics that have gone through the washing step;
A dissolution step in which the waste plastic selected through the washing and sorting steps is melted at a constant high temperature in a dissolution chamber, and the temperature and duration of the melting process are applied differently depending on the type and quality of the waste plastic;
In the melting step, an injection molding step of producing a high-strength reinforced soil retaining wall block by injecting the molten plastic into molds formed in various designs, shapes, and sizes after the melting process;
A cooling step of cooling the block after injection molding by the injection molding step; and
A method of manufacturing a high-strength reinforced soil retaining wall block for civil engineering using waste plastic, comprising an inspection step of inspecting the block that has undergone the cooling step to determine whether it meets the required specifications.