KR102449238B1 - Method of manufacturing soundproofing board for protection of residential area or public facility area using waste resources - Google Patents

Abstract

The present invention relates to a method of manufacturing a soundproofing board for the protection of residential area or public facility areas using waste resources. More specifically, the present invention relates to an improved method of manufacturing a soundproofing board for the protection of residential areas or public facility areas using waste resources, which forms extruded cement panels using waste Styrofoam and waste clothing, which are waste resources, and uses the extruded cement panels as a soundproofing board in public facility areas including residential areas and road facilities. Accordingly, noise generated in a groove between a protruding vertical surface and a concavo-convex part as well as noise waved horizontally and downward is circulated, and thus sound absorption properties are maximized.

Description

{Method of manufacturing soundproofing board for protection of residential area or public facility area using waste resources}

The present invention relates to a method for manufacturing a soundproofing plate for protection of a residential area or public facility area using waste resources, and more particularly, it is formed into an extruded cement panel using waste Styrofoam and waste clothing, which are waste resources, and this is used in a residential area or road facility. A residential area using improved waste resources to maximize sound absorption performance by circulating the horizontal and downward noise as well as the noise formed in the groove between the protruding vertical surface and the concave-convex part by using it as a soundproofing plate for public facilities including Or it relates to a method of manufacturing a sound insulation board for protection of public facilities.

In general, a soundproofing board is a wall installed in a residential area or a public facility area including road facilities (installed on a road or railroad side, etc.) to block various noises.

These sound-absorbing materials include a sound-absorbing material that has a rough surface or a large number of voids (open cells). .

Usually, rock wool, glass wool, sponge, etc. are used as sound absorbing materials, and absorbs more than 70% of sound energy, and the rest is reflected or continues through the sound barrier.

However, since the sound insulation board is installed in a way that it is sandwiched and stacked between a number of H-type supports fixed vertically from the ground to a certain height, when viewed from the front, it is nothing more than a simple square plate-shaped member. It is not possible to sufficiently absorb the noise that is irregularly generated from the position and location, and it is not possible to obtain a soundproofing effect higher than expected in terms of material and physical properties. For this reason, most of the effects are similar to simple dividing walls or blocking boards.

Domestic Registered Patent No. 10-2340284 (December 13, 2021) Eco-friendly rubber block sound-absorbing material using waste tires, eco-friendly sound-absorbing soundproofing board using the same, and its construction method

The present invention was created to solve the above problems in the prior art in consideration of the above-mentioned problems in the prior art, by using waste Styrofoam and waste clothing to form an extrusion-molded cement panel, and to form it into an extruded cement panel in a residential area or public facility area including road facilities. Soundproof plate for protection of residential area or public facility area using improved waste resources to maximize sound absorption performance by circulating the noise formed in the groove between the protruding vertical surface and the concave-convex part as well as the horizontal and downward wave noise by using it as a soundproofing plate Its main object is to provide a manufacturing method.

The present invention is a means for achieving the above object, the waste fiber processing step of pulverizing the waste fibers to a size of 5-10mm; Waste Styrofoam processing step of crushing the waste Styrofoam to a size of 5-10mm; A cement slurry manufacturing step of mixing the processed waste fibers and the waste Styrofoam with cement and water to make a slurry for molding; A vacuum degassing step of putting the cement slurry in a vacuum chamber and degassing it at a vacuum pressure of 75±5 mmHg; a vacuum extrusion molding step of extruding the degassed cement slurry at a pressure of 30±5 kg/cm 2 to form a panel having a plurality of sound-absorbing holes therein; An uneven processing step of processing the unevenness on the surface through the uneven roller maintained at the same speed as the extrusion speed; Cutting and steam curing step of first cutting the extruded cement panel with irregularities to a predetermined size and then curing it using steam; It provides a method for manufacturing a soundproofing board for protection of a residential area or public facility area using waste resources, characterized in that it consists of a second cut to product size after inspecting the cured surface, and then a final curing and autoclave curing step.

In this case, the waste fiber processing step includes a waste fiber collection and washing process; Cutting process of cutting the washed waste fibers into 5-10mm size; A cotton-making process in which the cut waste fibers are batted with a cotton swab machine and untied to form cotton; including a reprocessing process of softening, sterilizing, and drying the burned waste fibers; The waste Styrofoam processing step includes a waste Styrofoam collection and washing process; The grinding process of grinding the washed waste Styrofoam to a size of 5-10 mm; a mixing step of mixing 10 parts by weight of sericite powder and 5 parts by weight of vinegar with respect to 100 parts by weight of pulverized waste Styrofoam; The cutting and autoclave curing step is a step of curing in a kiln at 150 ~ 200 ℃, a pressure of 5 ~ 15 kg / ㎠;

As described above, the present invention utilizes waste Styrofoam and waste clothing to form an extruded cement panel and uses it as a soundproofing plate in a public facility area including a residential area or road facility. It provides the advantage of maximizing the sound absorption performance by circulating the noise formed in the groove between the vertical surface and the concavo-convex part.

Before describing the present invention in more detail, the terms or words used in the present specification and claims should not be limited to their ordinary or dictionary meanings, and the concept of terms should be properly explained in order to best describe the invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

The present invention makes an extruded cement panel using waste Styrofoam and waste clothing, which are waste resources that were disposed of, and forms a galley-type sound-absorbing hole when installed on the soundproof plate front panel, which is a road facility. Noise that waves horizontally and vertically downwards It is characterized in that it is configured to maximize the sound-absorbing and sound-insulating effect by inducing the noise formed in the groove between the protruding vertical surface and the concave-convex part formed in the extruded cement panel to circulate and disappear through the sound-absorbing hole.

In other words, the air in the place where the sound wave passes is caused by the change in density and pressure over time, and the volume of the space occupied by air molecules increases to give sound waves. And it is possible to sufficiently absorb the sound through the sound-absorbing hole in the form of a gallery by circulating the frequency into a shock wave.

To this end, the present invention provides a method for manufacturing a soundproofing plate for protecting a residential area or public facility area using waste resources so that it can be used as the above-described soundproofing board.

The sound insulation board manufacturing method according to the present invention comprises a waste fiber processing step of crushing waste fibers to a size of 5-10 mm, a waste Styrofoam processing step of crushing the waste Styrofoam to a size of 5-10 mm, cementing the processed waste fibers and the waste Styrofoam with cement and Cement slurry manufacturing step to make slurry for molding by mixing with water, vacuum degassing step in which cement slurry is put in a vacuum chamber and degassed at a vacuum pressure of 75±5mmHg, and the degassed cement slurry is extruded at a pressure of 30±5kg/㎠ A vacuum extrusion molding step of making a panel with a number of sound-absorbing holes, an uneven processing step of processing unevenness on the surface through uneven rollers maintained at the same speed as the extrusion speed, 1 It consists of a cutting and steam curing step that is cured using steam after secondary cutting, a second cutting to product size after inspecting the cured surface, and a cutting and autoclave curing step of final curing.

At this time, it can be autoclaved and commercialized as a final product, but a ceramic coating agent is applied to the surface of the product to minimize surface contamination of the soundproofing plate by soot, dust, fine dust, etc., and to solve problems such as yellowing or discoloration by ultraviolet rays further steps may be performed.

The sound insulation board product manufactured through this process may have the form as shown in the picture below, which is an exemplary picture.

In particular, since the sound insulation board manufactured by the manufacturing method according to the present invention has a porous structure made of waste fibers and waste Styrofoam, countless voids are formed. The noise (sound waves) that collided with the surface is diffusely reflected by the irregularities, is formed in the soundproofing plate through the gap, and spreads into the sound-absorbing hole that is relatively hundreds of times to thousands of times larger than the gap, and is instantly extinguished and absorbed.

Because of this structure, even if it is installed in a vertical plate shape by inserting it into the H-type support like the existing one, the sound absorption characteristics are improved significantly more than before.

Here, the waste fiber used in the waste fiber processing step provides electrical insulation as well as chemical resistance due to fire resistance, and in particular, waste clothing can be utilized. As the main raw materials of waste clothing are polyethylene and polyester, it is environmentally friendly and has excellent processability and moldability.

In addition, the waste fiber processing step includes a waste fiber collection and washing process; Cutting process of cutting the washed waste fibers into 5-10mm size; A cotton-making process in which the cut waste fibers are batted with a cotton swab machine and untied to form cotton; It includes the reprocessing process of softening, sterilizing, and drying the burned waste fibers.

At this time, the reason why the other surface is required is to induce uniform dispersibility to smoothly induce the formation of voids in the extruded cement panel.

In the reprocessing process, 200 g of acetic acid, 100 g of sodium hydroxide, 200 g of calcium carbonate, and 40 g of hydrogen peroxide were put in a rotatable container based on 3 liters of water, and 1 kg of the cotton wool was put in and rotated at a speed of 150 rpm for 30 minutes. It is a process of stirring and then taking it out and drying it.

In this way, acetic acid, a weak acid, and sodium hydroxide, a strong base, react and neutralize as shown in the following reaction formula to produce water and sodium acetate.

CH ₃ COOH + NaOH → H ₂ O + CH ₃ COONa

Sodium acetate obtained in this way exists in the form of acetate ions (CH ₃ COO ^- ) and sodium ions (Na ⁺ ) in water. The uniform dispersibility is improved by spreading it evenly so that it does not fall off.

In particular, calcium carbonate helps to promote the activity of these ions, and in the process, hydrogen peroxide water further promotes the generation of bubbles, thereby accelerating the reaction described above, and in this process, bacteria and residual microorganisms are sterilized.

In addition, the waste Styrofoam used in the waste Styrofoam processing step is an impeding factor that harms the risk of fire and the aesthetics of the city.

In particular, waste Styrofoam is an insulating material composed of 98% of volume air and 2% of resin such as polystyrene. It has a density of 0.04 and is widely used as a building material because of its lightness, sound absorption, impact resistance, and thermal insulation properties. However, due to the weakness of being weak to fire and emitting harmful gases, products with enhanced non-combustibility by mixing various non-combustible materials have recently appeared.

In the present invention, the waste Styrofoam is finely pulverized without disposing of it to improve compatibility with cement, thereby forming pores and allowing it to be recycled very appropriately as a cement admixture material. In particular, it contributes so that the extruded cement panel used as a soundproofing board can naturally have heat insulation as well as lightness, cushioning properties, and chemical resistance.

The waste Styrofoam processing step includes a waste Styrofoam collection and washing process; The grinding process of grinding the washed waste Styrofoam to a size of 5-10 mm; It includes a mixing step of mixing 10 parts by weight of sericite powder and 5 parts by weight of vinegar with respect to 100 parts by weight of the pulverized waste Styrofoam.

Here, the reason for pulverizing to a size of 5-10 mm is to serve as an intermediate suction hole when the waste fibers form pores.

In addition, it is to increase the adhesion area to the surface of the waste Styrofoam to which sericite powder is added and mixed to strengthen the binding property by doubling the adhesive force, thereby increasing durability, and vinegar is to play a role as an eco-friendly disinfectant.

On the other hand, the cement slurry manufacturing step is a step of making a moldable material, and after mixing 50 parts by weight of cement, 15 parts by weight of processed waste fibers, and 10 parts by weight of processed waste Styrofoam with respect to 100 parts by weight of water, mixed with a mixer for 30 minutes in the form of mixing.

At this time, in order to improve the performance of the cement, a thickener, an admixture, a durability enhancer, etc. may be additionally added as a performance improving agent.

In addition, the vacuum degassing step is to prevent damage to the shape of the extruded cement panel molded by air bubbles during molding, and to induce a uniform distribution of waste fibers.

In addition, the primary cutting refers to cutting to an appropriate size for steam curing, and the steam curing is to achieve rapid curing as the primary curing to fix physical properties.

In addition, secondary cutting refers to cutting to the size of the final product, and autoclave curing, which is the final curing, puts concrete in a high-temperature and high-pressure kiln, and after concrete hitting, harmful effects such as temperature, load, impact, soiling, and damage are eliminated. It is cured to secure strength and hardness by curing so as not to receive it.

In the present invention, it can be finally cured at 150 ~ 200 ℃, 5 ~ 15kg / ㎠ pressure.

On the other hand, the sound insulation board according to the present invention can be finalized through the step of applying a ceramic coating agent to the surface of the sound insulation board. and to solve problems such as yellowing or discoloration caused by ultraviolet rays.

This step consists of a process of manufacturing a ceramic coating agent and a process of applying the prepared ceramic coating agent to the surface of the sound insulation board.

The process of preparing the ceramic coating agent is to add 5 parts by weight of colloidal silica dispersion or silica to 100 parts by weight of a solvent such as alcohol and water, which is a hydrolysis medium, and then 50 parts by weight of an alkoxysilane capable of hydrolysis and 30 parts by weight of a silane coupling agent. After adding 5 parts by weight of a metal oxide sol having a size of 10 to 20 nm by weight, 5 parts by weight of zirconium and 5 parts by weight of alumina are added and reacted for 5 hours.

At this time, the alkoxysilane is methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), tetramethoxysilane (TMOS), tetraethoxysilane (TEOS), diphenyldiethoxysilane (DPDES), diphenyl It may be one selected from dimethoxysilane (DPDMS).

These ceramic coatings provide strong antifouling properties, and even if dust settles on the surface of the soundproofing board, they are easily washed away when it rains, so that no pollution occurs, and the resistance to discoloration is secured due to strong UV resistance.

In addition, in order to strengthen the properties of the ceramic coating agent to be made in this way, 10 parts by weight of carbon amino silica black based on 100 parts by weight of the ceramic coating agent; 5 parts by weight of dimethyl acrylamide; CH ₂ C(CH ₃ )COOCH ₃ 10 parts by weight; And 5 parts by weight of barium carbonate may be further added.

At this time, carbon amino silica black improves durability by suppressing crack resistance and interfacial separation by increasing the tensile strength of the coated surface.

In addition, dimethyl acrylamide is added to suppress cracks by preventing shrinkage while increasing fluidity and flowability.

In addition, CH ₂ C(CH ₃ )COOCH ₃ increases the bonding strength at the bonding center when bonding between components is made, and increases the wear resistance on the outer surface.

And, barium carbonate promotes aggregation to improve hardenability and induces to form a smooth surface to increase moldability and processability, and also contributes to prevention of oxidation and discoloration by not absorbing ultraviolet rays.

The sound absorption of the soundproofing board manufactured according to this manufacturing method was measured based on ASTM C 423. In this case, the specification should have a noise reduction coefficient (NRC) of 0.5 or more.

Here, if NRC is 0, it means that sound absorption is not made at all, and 1.0 means a state of complete sound absorption.

As a result of the test, it was confirmed that the NRC was 0.72. In addition, considering that the average NRC of the current soundproofing board on the market is 0.55 for comparison, it was confirmed that the sound-absorbing property of the soundproofing board according to the present invention is very excellent compared to other soundproofing boards.

Claims (2)

Waste fiber processing step of pulverizing waste fibers to a size of 5-10 mm; Waste Styrofoam processing step of crushing the waste Styrofoam to a size of 5-10mm; A cement slurry manufacturing step of mixing the processed waste fibers and the waste Styrofoam with cement and water to make a slurry for molding; A vacuum degassing step of putting the cement slurry in a vacuum chamber and degassing it at a vacuum pressure of 75±5 mmHg; a vacuum extrusion molding step of extruding the degassed cement slurry at a pressure of 30±5 kg/cm 2 to form a panel having a plurality of sound-absorbing holes therein; An uneven processing step of processing the unevenness on the surface through the uneven roller maintained at the same speed as the extrusion speed; Cutting and steam curing step of first cutting the extruded cement panel with irregularities to a predetermined size and then curing it using steam; After inspecting the cured surface, the second cut to the product size is made, followed by the final curing and autoclave curing steps.
The waste fiber processing step includes a waste fiber collection and washing process; Cutting process of cutting the washed waste fibers into 5-10mm size; A cotton-making process in which the cut waste fibers are batted with a cotton swab machine and untied to form cotton; including a reprocessing process of softening, sterilizing, and drying the burned waste fibers;
The waste Styrofoam processing step includes a waste Styrofoam collection and washing process; The grinding process of grinding the washed waste Styrofoam to a size of 5-10 mm; a mixing step of mixing 10 parts by weight of sericite powder and 5 parts by weight of vinegar with respect to 100 parts by weight of pulverized waste Styrofoam;
The cutting and autoclave curing step is a method of manufacturing a sound insulation board for protection of a residential area or public facility area using waste resources, characterized in that it is a step of curing in a kiln at a pressure of 150 to 200° C. and 5 to 15 kg/cm 2 .
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