KR20040003518A - United light-weight concrete panel and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A united lightweight concrete panel is provided to have soundproofing and thermal insulating effects and durability. CONSTITUTION: The lightweight soundproofed wall contains a base for supporting a post, posts erected on the base at regular intervals, and a sound absorbing panel installed between posts. Wherein the sound absorbing panel is unified by forming a mixed layer in a contact area where a sound absorbing plate provided with various shaped sound absorbing projections and composed of porous lightweight concrete is mixed with a bonding plane of general concrete supporting the sound absorbing plate. The solid lightweight concrete panel(30) is formed by attaching a porous lightweight concrete sound absorbing panel(24) on a general concrete panel(22) to absorb noise.

Description

Integrated lightweight concrete panel and manufacturing method thereof {UNITED LIGHT-WEIGHT CONCRETE PANEL AND MANUFACTURING METHOD THEREOF}

The present invention relates to a soundproofing, a windproof panel, and a method for manufacturing the same. The present invention is not limited to the production of such a panel, but is required for soundproofing, heat insulation, fire resistance, weather resistance, etc. in road facilities, exterior materials, and exterior / interior materials of buildings. It relates to a unitary lightweight concrete panel that can be used in the paper part and a method of manufacturing the same.

With the diversification of transportation and the increase of traffic volume along with industrial development, and the expansion of social infrastructure (roads, railways, airports), people living near roads, airports, railways, schools, apartments, etc. The noise of the cars is suffering a lot. Such noise pollution is a side effect of civilization's selfishness, and it is a big grievance for urban residents living in modern life, and it is becoming a factor of various civil complaints.

Therefore, when designing social infrastructure such as roads in developed countries as well as in various countries, noise standards of less than a certain level are proposed in residential or specific areas, and the Ministry of Environment is preparing the standard in Korea.

Various types of soundproof walls have been installed, and a conventional soundproof wall commonly used is an aluminum soundproof wall.

The existing aluminum soundproof walls may be incompatible with nature due to the metallicity of aesthetic aluminum or give rigidity, and may cause visual emotional anxiety due to the stress of heterogeneous surfaces.

In addition, environmentally, the existing aluminum soundproof walls are harmful to nature and the human body because G / W, which is a sound absorbing material, contains carcinogens and is easily exposed to the outside.

In addition, the conventional concrete panel has a limitation of installation and application because it is difficult to overcome the problem of heavy weight, and the noise could not be installed in urban and residential areas in the form of a simple reflection.

In addition, it could not satisfy the important physical properties of civil construction materials such as sound insulation, insulation and fireproof, and failed to attract the attention or attention of consumers due to the inability to design products in a variety of environmentally friendly ways.

In addition, there were problems of economics such as the limitation of the application area and excessive manufacturing cost.

The present invention has been made to solve the above problems, it is possible to harmonize well with the surrounding landscape as a whole, not only can be aesthetically excellent design, but also an integrated lightweight concrete panel that can implement excellent sound insulation / insulation effect and durability And it aims to provide a manufacturing method thereof.

1 is a view showing a lightweight concrete soundproof wall according to the present invention.

2 is a view showing an integrated lightweight concrete panel according to the present invention.

Figure 3 is a view showing the attachment form of lightweight concrete and general concrete.

4 is a view illustrating a process in which rebars and inserts are installed.

<Description of Major Symbols in Drawing>

12: foundation stand 21: prop

20, 30: integral lightweight concrete panel 22: general concrete panel 24: sound absorbing plate 26: mixed layer

The integrated lightweight concrete panel according to the present invention is a sound absorbing panel in a soundproof wall comprising a base for erecting a strut, a strut erected at a predetermined interval on the base, and a sound absorbing panel provided between the struts. Is a sound absorbing plate composed of various types of sound-absorbing protrusions regularly arranged on the surface thereof, and the sound absorbing plate made of porous lightweight lightweight concrete and the attachment surface of the general concrete supporting the sound absorbing plate are mixed with each other to form a mixed layer in the contact section. It features.

In addition, the sound absorbing plate is characterized in that the specific gravity is configured by mixing lightweight concrete using an artificial lightweight aggregate of about 0.5 to 0.6.

In addition, the manufacturing method of the integral lightweight concrete panel according to the present invention comprises the steps of assembling the mold according to the shape and the external shape of the panel to meet the purpose of heat insulation and soundproofing, and mixing and placing lightweight concrete on the assembled mold And the step of stiffening the compounded and poured lightweight concrete and installing reinforcing rods and inserts, and mixing and pouring general concrete into the compacted lightweight concrete, crushing, and manufacturing the compacted general concrete and the lightweight concrete integrally. After about 15 hours, characterized in that it comprises the step of demolding in the mold.

In addition, the blending ratio of the lightweight concrete in the step of blending the lightweight concrete is characterized in that the ratio of the light aggregate, pigment, cement, water is 500kg, 7.5kg (3% of the amount of cement), 250kg, 100L respectively. It is done.

In addition, the one-piece lightweight concrete panel is characterized by using the "fresh-on-fresh" method for placing the lightweight concrete, concrete concrete that is the support layer immediately after the vibration compaction.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a view showing a lightweight concrete soundproof wall according to the present invention.

Lightweight concrete soundproof wall according to the invention is largely installed in the ground, as shown in Figure 1, the base 12 for erecting the strut 21, and the strut 21 built on the base 12 And a sound absorbing panel 20 installed between the support stand 21 and the support stand 21.

In the above, the base 12 is installed in a plurality at regular intervals, it is not necessary to install the pedestal connecting the existing base 12 and the base 12.

That is, the function of the pedestal is to structurally strengthen the entire soundproof wall by connecting between the base 12 and the base 12, and at the same time is installed up to a certain height from the ground so that the sound-absorbing panel made of metal is in contact with the ground and corroded. Serves to prevent this from happening.

However, in the present invention, the material of the sound absorbing panel 20 is excellent in physical properties such as heat dissipation, soundproofing, sound absorption, etc., than conventional metals such as aluminum, and is lightweight concrete that does not corrode even when contacted with the ground. It also functions naturally as a structural reinforcement material.

On the base 12 is a strut 21 made of the same concrete as the base 12 is erected, the sound absorbing panel 20 is formed on both sides of the strut 21.

2 is a view showing a unitary lightweight concrete panel 30 according to the present invention.

The integrated lightweight concrete panel 30, as shown in Figure 2, attached to the sound-absorbing plate 24 of the porous lightweight concrete absorbing noise to the general concrete panel 22, which functions as a structural material, integrated through the factory production It can be formed of a panel.

Since the general concrete panel 22 is made of precast, the length of the integrated lightweight concrete panel 30 may be longer than that of the existing metal panel, since its strength is about 250 to 500 kg / mm 2. That is, since it is a concrete product rather than a metal panel can be installed structurally stable.

The surface of the sound absorbing plate 24 is made of a regular array of sound absorbing projections of various forms.

In FIG. 2, the round rib shaped sound absorbing plate 24 is illustrated as a specific example.

The sound absorption board 24 is comprised by mix | blending lightweight concrete using the artificial lightweight aggregate of about 0.5-0.6 specific gravity.

In particular, artificial lightweight aggregate is a product of porous matrix (Porous Matrix) is produced by mixing and molding dry concrete by general Portland cement and water to produce a soundproof wall, and is used in various fields because of the excellent sound absorption effect.

In addition, artificial lightweight aggregate is produced using a specific gravity of about 0.5 ~ 0.6, particle size 2 ~ 4mm to significantly reduce the unit weight of concrete from about 2.3 to about 1.6 tons.

The following table shows the types of artificial lightweight aggregates used for industrial purposes.

Table 1 Types of Artificial Lightweight Aggregate

Type of artificial lightweight aggregate unit Liapor Liaver Raw materials Expanded clay Inflatable glass Particle density kg / cm ³ 0.55 ~ 0.65 0.25 ± 10% Loose bulk density kg / cm ³ 325 ± 25 190 ± 10% shape Round sphere shape Round sphere shape

As shown in Table 1, the artificial light weight aggregate mainly used for industrial purposes is expanded clay, which has aggregate sizes of about 4 to 8 mm and about 0 to 4 mm. These expanded clays not only have good thermal insulation properties, but also have soundproofing, fire resistance, weathering, and sufficient strength as needed.

Thermal insulation and structural strength requirements can be obtained by the fine lightweight aggregate having a loose bulk density of having a loose bulk density of 300 ~ 350kg / cm ³ and coarse lightweight aggregate 400 ~ 500kg / cm ^3.

The lighter the expanded clay, the better the structural strength performance, and the denser the lightweight aggregate, the better the thermal conductivity.

The new expanded glass introduced to improve these conflicting properties with expanded clay is Liaver.

The surface of the sound absorbing plate 24 is formed in the form of rubber, wood, iron, etc. with a wide range of choice, and various forms are possible on the back of general concrete as needed. For example, it may be configured in various forms such as hatched, rake, triangular, ribbed, and rounded ribbed.

In addition, the sound-absorbing plate lightweight concrete can be produced in a variety of colors, and the general concrete panels to be supported can also be made of colored concrete.

As such, the sound absorbing plate has a sound absorption performance of 8 to 12 dB compared to the notice of the Ministry of Environment.

Therefore, it is possible not only to realize the excellent soundproofing effect using artificial lightweight aggregate, but also to design soundproof walls of various colors and shapes, thereby improving the uniform soundproofing facilities and improving the aesthetics of the urban environment.

The sound absorbing plate 24 may be attached to only one side as shown in FIG. 2, and may be attached to both sides.

This integrated lightweight concrete panel uses a so-called "fresh-on-fresh" method of placing lightweight concrete after pouring compaction and vibration compacting.

In this way, the interface between the lightweight concrete and the supporting concrete is mixed with each other to form a mixed layer 26, which is an adhesive section where the light concrete and the general concrete of about 2 to 3 cm are mixed, and are integrated. More preferably, the range may be about 3 to 4 cm.

In addition, the interface of integral lightweight concrete panels is very strong and requires no interconnects. This is demonstrated by the adhesion test of Table 2 below.

Table 2 Freeze-thawing Test ("B" Class)

Test Items Resistance to freeze-thawing Appearance (crack, color) % Change in weight Bond strength (kgf / cm ² ) Speed 5mm / min result Freeze fusion - - 4.6 30 cycles after freezing and thawing clear -1.9 0.6 50 cycles after freezing and thawing clear -3.4 0.2

As shown in Table 2, the results of the freeze thaw test are as follows.

After 30 cycles of freezing and thawing, the appearance was intact and the weight decreased by about 2%. This means more than 30 years of durability in the natural environment.

According to the bond strength test, the test material was not destroyed at the interface between light concrete and ordinary concrete, but resulted in light concrete, which means that the light concrete is not destroyed in the natural environment and no special external force is applied. It means that no break at one attachment interface occurs.

Therefore, damage to the product due to environmental and climate change is maintained for more than 30 years, and the attachment interface is also firmly attached and does not affect the life of the product.

On the other hand, integral lightweight concrete panels are mainly used as soundproof walls for their excellent sound absorption properties as described above, but besides the surface finish of retaining walls, soundproofing materials for tunnel and subway stations, excellent insulation and structural strength properties are not only used for residential exterior materials, but also for supermarkets. It can be used in various ways as a wall material for storage, storage warehouse, industrial building, etc.

Looking at the manufacturing process of the integrated lightweight concrete panel as follows.

Using artificial lightweight aggregate, add a certain amount of pigment to the amount of cement, mix lightweight concrete, place it on the mold, and use the vibration compactor to fix it. After the general concrete is poured, it is manufactured in one piece, but the attachment surface of lightweight concrete and general concrete is mixed with each other so that the range is about 2 ~ 3cm. In addition, more preferably, the range may be about 3 ~ 4cm.

The thickness and appearance of light weight and general concrete can be produced in various ways, and the structure and materials must be robust and able to withstand the conditions of the installation site, especially mechanical cleaning by water.

The integrated panel manufactured by the above method is demolded within 15 hours after pouring to cure in a natural state, taking care not to change the appearance and color.

Hereinafter, a detailed look at the manufacturing process of the above-mentioned integrated lightweight concrete panel.

1. Mold Assembly

The mold and external shape of the integral lightweight concrete panel that is required and required for insulation and sound insulation purposes shall be specified and assembled accordingly.

For example, the larger the surface area of the sound absorbing layer, the greater the degree of sound absorption. Therefore, the required sound absorbing degree and structural stability are judged according to the site conditions and the required level to assemble the mold suitable for the structure of the sound absorbing layer.

2. Lightweight concrete mixing and pouring

3 is a view in which lightweight concrete and general concrete are manufactured integrally.

Referring to Figure 3, the portion forming the projection is lightweight concrete.

The blending ratio of the lightweight concrete is made up of 1 m ³ lightweight aggregates, pigment, the proportion of cement, respectively, the proportion of water 500kg, 7.5kg (3% of cement amount), 250kg, 100L per.

In particular, artificial lightweight aggregate is manufactured using a specific gravity of about 0.5 ~ 0.6, particle size 2 ~ 4mm to significantly reduce the unit weight of concrete from about 2.3 to about 1.6 tons.

Here, the mixing of the lightweight concrete is performed in the following steps. That is, the first light aggregate and 20L of water are put into the blender and the first bibim is performed. Once the aggregate has sufficiently absorbed water, the cement and 80 liters of water are poured and secondary bibim is performed. Thirdly, the pigments can be added and the third bibeam can be made to produce a desired color. Finally, the blended lightweight concrete is discharged.

3. Lightweight concrete compaction and rebar, insert installation

The compounded lightweight concrete is poured into the mold and compacted sufficiently using a vibration compactor. The rebar and insert are then installed (see Figure 4).

4. General concrete mixing, pouring, compaction

When the lightweight concrete compacted through the vibration compactor does not harden (within about 15 minutes after the vibration compaction in time), the general concrete and the lightweight concrete two materials are integrally manufactured by pouring ordinary concrete.

5. Demoulding and Curing

After about 15 hours after the general concrete and lightweight concrete are manufactured integrally, demolding is performed in the mold.

The demolded product is cured for at least 28 days in its natural state to generate sufficient strength.

In particular, the steps 1, 2, 3, and 4 should all be produced indoors, the production is at room temperature 20 ℃ or more. On the other hand, the curing process, which is the fifth step, is performed outdoors.

As described above, the integrated lightweight concrete panel according to the present invention uses a so-called "fresh-on-fresh" method of pouring lightweight concrete after pouring compaction of support layer concrete.

In this way, the interface between the lightweight concrete and the supporting concrete is mixed with each other to be integrated.

On the other hand, integral lightweight concrete panels are mainly used as soundproof walls for their excellent sound absorption properties as described above, but besides the surface finish of retaining walls, soundproofing materials for tunnel and subway stations, excellent insulation and structural strength properties are not only used for residential exterior materials, but also for supermarkets. It can be used in various ways as a wall material for storage, storage warehouse, industrial building, etc.

As described above, the integrated lightweight concrete panel according to the present invention is manufactured using artificial lightweight aggregate (specific gravity 0.5-0.6, particle size 2-4mm), and the unit weight of concrete is about 2.3 to about 1.6 tons Can be greatly reduced.

In addition, artificial light weight aggregates fired using pure natural materials (about 1200 degrees) exhibit porosity, which satisfies the requirements of sound insulation, heat insulation, fire resistance, etc., and various patterns and inorganic pigments using wood and rubber products. By using it, you can design products that are beautiful and harmless to the environment and human body.

In addition, new products and aesthetics are added to consumers who are starting to question the performance, aesthetics and durability of existing materials.

Lastly, it can be mass-produced integrally in the factory, which makes production cost and quality control easy, and durability and maintenance make it easy to combine production and maintenance costs.

Claims (5)

In the soundproof wall comprising a base for erecting the strut, a strut erected at regular intervals on the base, and a sound absorption panel provided between the strut, The sound absorbing panel has various types of sound absorbing protrusions regularly arranged on the surface thereof, and the sound absorbing plate made of porous lightweight concrete and the attaching surface of the general concrete supporting the sound absorbing plate are mixed with each other to form a mixed layer in the contact section. An integrated lightweight concrete panel, characterized in that. The method of claim 1, The sound absorbing plate is a one-piece lightweight concrete panel, characterized in that the specific gravity is configured by mixing lightweight concrete using artificial lightweight aggregate of about 0.5 to 0.6. Assembling the mold according to the shape and external shape of the panel for the purpose of insulation and sound insulation; Mixing and pouring lightweight concrete into the assembled mold; The step of installing the reinforcement, insert the compacted and poured lightweight concrete, General concrete mix and pour, chopped to the compacted lightweight concrete, After about 15 hours after the production of the compacted general concrete and the lightweight concrete integrally, the method of manufacturing an integrated lightweight concrete panel, characterized in that it comprises the step of demolding in the mold. The method of claim 3, wherein The mixing ratio of the lightweight concrete in the step of mixing the lightweight concrete is the weight of light aggregate, pigment, cement, water per 1 m ³ is composed of 500kg, 7.5kg (3% of the amount of cement), 250kg, 100L ratio Method for producing a unitary lightweight concrete panel, characterized in that. The method of claim 3, wherein The integrated lightweight concrete panel is a method of manufacturing a unitary lightweight concrete panel, characterized in that using the "fresh-on-fresh" method of placing the concrete, the support layer immediately after placing the lightweight concrete, vibration compacting.