KR100496646B1 - Lightweight foaming concreat - Google Patents

Abstract

The present invention relates to a solid-state powder self-foaming agent composition and lightweight foamed concrete using the same, and more particularly, it is possible to produce a homogeneous product with a simplification of the work process, and to produce and use lightweight foamed concrete quickly and easily without any equipment. It relates to a solid powder self-foaming agent composition and a lightweight foamed concrete using the same.

In the present invention, in the lightweight foamed concrete for in situ casting: 20 to 30 parts by weight of aluminum fine powder, 20 to 30 parts by weight of acetic acid-based activated carbon compound, 20 to 30 parts by weight of alpha olefin anion which is a surfactant, alkylbenzene anion The mixture is stirred and mixed at a composition ratio of 20 to 30 parts by weight, and the mixed compound is prepared by aging for 4-6 hours.

Description

Solid powder self-foaming agent composition and lightweight foamed concrete using the same

The present invention relates to a solid-state powder self-foaming agent composition and lightweight foamed concrete using the same, and more particularly, it is possible to produce a homogeneous product with a simplification of the work process, and to produce and use lightweight foamed concrete quickly and easily without any equipment. It relates to a solid powder self-foaming agent composition and a lightweight foamed concrete using the same.

In general, lightweight foam concrete, which is installed to insulate the rooftop or floor of apartment buildings and absorb sound, is divided into three types: high pressure steam curing (ALC), atmospheric steam curing (PALC), and site casting (apartment insulation). Among the curing methods, foaming method, pre-foam method, and mixer foam (Mix-foam) method are classified according to the bubble generation method. These types can be distinguished by mixing the foaming agent in the slurry and foaming and mixing the foam in the slurry in advance. A method of foaming bubbles in a slurry is a method used in manufacturing a product such as ALC, and a metal powder foaming agent (AL powder, Zn powder, etc.) is used. On the other hand, the method of making the foam in advance and mixing it into the slurry is a method used in the production of foam concrete for in-site casting, using an organic foaming agent (vegetable foaming agent, animal protein foaming agent and the like).

Since the final volume can not be determined by mixing the foaming agent in the slurry and foaming, as in the manufacture of ALC, it is cut and cured to a certain size after complete foaming.However, the method of preparing the foam in advance and mixing it with the slurry is poured by design volume. Since curing is necessary, there is a difference in that processing after pouring is unnecessary. In addition, the metal powder foaming agent reacts in a high temperature condition in most cases, the chemical reaction does not occur at room temperature or tends to occur late, the production amount at the time of production at room temperature is low, while the productivity is low, while the organic foaming agent is at room temperature It is easily foamed at, so it is mainly used for on-site pouring.

The prior art using a dry powder foaming agent is a technique for producing ALC products using metal aluminum powder or metal zinc powder. Metal powders have never been used in light-weight foam concrete for in-site casting, and animal protein foaming agents have been used to produce light-in-foam concrete for in-site casting. This is because the metal powder foaming agent is low in productivity due to the low amount of bubbles produced, and is expensive, because it is less economical than the investment cost and cannot be effectively used.

Conventionally, the method for manufacturing lightweight foam concrete is a high pressure compressor when diluting the organic foam stock solution at a concentration of about 2% in a large container of about 20-30 tons, and then pumping it to the foamer using the foam liquid transfer pump. The compressed air produced by the present invention is sprayed on the bubble liquid transferred to the foaming machine to form a bubble group, and a method of mixing with the mortar slurry is mainly used. Here, the specific gravity of the bubble group is generally about 0.035 to 0.05 and mixed with the cement slurry to form a stable foam concrete, but since the shape and size of the foaming machine making the bubble is not constant for each equipment, Quality can only be manufactured differently. In addition, since the concentration of diluting the bubble stock solution varies from about 2 parts by weight to 7 parts by weight depending on the operator, the specific gravity of the bubble group is varied and it is natural that the quality of the light foam concrete is heterogeneous. .

In addition, since the bubble stock solution used is an organic substance, it is difficult to process the foam dilution after the completion of the foam concrete pouring process. .

Such lightweight foam concrete is usually manufactured by pre-foaming method, and the quality of the product is heterogeneous according to the skill of the operator. As a result, there are frequent cases of reconstruction due to delayed construction and subsequent process delays, and the situation is becoming a social problem due to civil complaints caused by noise disputes on the upper and lower floors of multi-family houses.

The present invention has been made in view of the above problems, it is possible to produce a homogeneous product with the simplification of the work process, solid-phase powder self-foaming agent to be able to quickly and easily manufacture and install lightweight foam concrete without any equipment; The main purpose is to provide lightweight foam concrete using the same.

Another object of the present invention is to be lightweight, heat-insulated, yet to be reinforced sound insulation and fire resistance.

Another object of the present invention is to be able to manufacture and use lightweight foamed concrete quickly and easily at low cost.

In order to effectively achieve the above object, the present invention provides a lightweight foamed concrete for in situ casting: 20 to 30 parts by weight of aluminum fine powder, 20 to 30 parts by weight of acetic acid-based activated carbon compound, and 20 to 20 alphaolefinic anion as a surfactant. It is characterized in that the mixture is stirred at 30 parts by weight, the composition ratio of 20 to 30 parts by weight of alkylbenzene anion, and aged by mixing the mixed compound at 18 ~ 40 ℃ 4-6 hours.

In addition, 0.1 to 0.5 parts by weight of a solid powder magnetic foaming agent prepared by stirring and mixing an aluminum fine powder, an acetic acid activated carbon compound, an alpha olefin anion which is a surfactant, and an alkylbenzene anion, 70 to 80 parts by weight of Portland cement, and silica sand 20 Functional light weight self-expanding cement is prepared by mixing ˜30 parts by weight, 1-5 parts by weight of quicklime, and 1-5 parts by weight of silica flaw: while 30-40 parts by weight of water is mixed with 60-70 parts by weight of the functional foam cement. It is characterized by.

Hereinafter, the present invention will be described in detail based on specific examples.

The solid-phase powder self-foaming agent of the present invention comprises an aluminum fine powder, an acetic acid-based activated carbon compound (acetic acid), and an alpha olefin-based anion and an alkylbenzene-based anion which are surfactants.

20-30 parts by weight of the aluminum fine powder, 20-30 parts by weight of acetic acid-based activated carbon compound and 20-30 parts by weight of a liquid surfactant alphaolefin-based anion, and 20-30 parts by weight of an alkylbenzene-based anion. It is aged at 18-40 ° C. for 4-6 hours. In the aging process, the aluminum fine powder causes an exothermic reaction by an alkali component and a chemical reaction of the acetic acid-based activated carbon compound, thereby releasing water molecules to prepare a solid powder blowing agent having an activated carbon function.

At this time, the acetic acid-based activated carbon compound is also referred to as acetic acid, the amount of the acetic acid is more than 30% in dry wood (乾 材 量), and some tar is dissolved in crude wood (粗 木 醋) It can classify by distillation. It is a dark brown liquid with an irritating odor. More than 80% is water. The specific gravity is 1.018 to 1.030 and contains a large amount of acetic acid. In addition, lower fatty acids such as methanol and formic acid, methyl acetate, formaldehyde, acetaldehyde, furfural, acetone, methyl ethyl ketone, diethyl ketone, ammonia and methyl It is a large number of organic compounds such as amine, pyridine, toluene and xylene.

The solid powder self-foaming agent prepared as described above is to be made by the preparation method shown in Table 1.

TABLE 1

<Solid powder self-foaming agent manufacturing method>

On the other hand, by mixing the additional materials and the mixing of a certain ratio of water so as to double the function of the solid powder self-foaming agent, it is possible to manufacture a lightweight foam concrete.

When the 70 to 80 parts by weight of Portland cement is mixed with 0.1 to 0.5 parts by weight of the solid powder magnetic foaming agent, and 20 to 30 parts by weight of silica sand, 1 to 5 parts by weight of quicklime and 1 to 5 parts by weight of silica blemishes, functional lightweight magnetic foaming Cement is produced, and when a certain amount of water is added thereto, lightweight foamed concrete is produced.

That is, the silica sand, quicklime, and silica blemishes added to the solid powder foaming agent and the Portland cement serve to increase the durability and fire resistance of the cement due to the material properties, and water 30 to 60 to 70 parts by weight of the functional foam cement thus prepared. When the slurry is mixed by 40 parts by weight, lightweight foamed concrete is produced in a short time in the field, and is poured into a non-bearing wall or the like, so that a building or the like has solid durability.

Table 2 in the mixing ratio of the lightweight foamed concrete prepared as described above compares the volume ratio of the foamed foamed concrete before and after foaming according to the addition amount of silica sand.

TABLE 2

<Mixing ratio of light foam concrete>

As a result of the experiment as described above, the lightweight foam concrete of the present invention was higher than the value according to KSF 2459, and the construction can be made in a short period of time, as it is possible to follow-up process after 1-2 days after pouring. In addition, it was found that the compounding 2 and compound 3 showed high compressive strength by adding silica sand (fine aggregate) as shown in the following <Table 3>.

Table 3 shows the physical properties according to the addition amount of silica sand of lightweight foam concrete.

TABLE 3

<Physical Properties of Lightweight Aerated Concrete>

As shown in Table 3, it can be seen that as the amount of silica sand is increased, the specific gravity and compressive strength are greatly improved.In the experiment 1 and 2 of the experiment, the specific gravity of KSF 2459 was 0.7 or less. 3, the addition of silica sand increased the specific gravity.

In addition, the lightweight foamed concrete of the present invention was confirmed by the quality inspection institutes through various test methods to test the strength, thermal conductivity, absolute dry apparent specific gravity and length change rate, the absorption rate.

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In addition, Figure 1 is a cross-sectional view showing that the lightweight foamed concrete 10 of the present invention is placed on the non-bearing wall 20, when the lightweight foamed concrete 10 is poured on the non-bearing wall 20, pre-foaming The concrete does not shrink and swell without foaming after pouring, as in the method.

That is, when constructing a non-bearing wall (inter-generational partition) such as a multi-family house or a high-rise building, lightweight self-foaming concrete is formed between the formwork of the non-bearing wall 20 by using a cement board 30 and a plaster board 40. When a suitable amount (about 60-70%) is injected into the construction volume, the light-weight foaming concrete will cause a foaming reaction and gradually increase the volume between 60 to 120 minutes to be laminated. At this time, the light weight self-foaming concrete and the formwork (cement board, gypsum board) is increased to form a solid non-bearing wall.

Therefore, the solid powder self-foaming agent and the lightweight foam concrete according to the present invention can produce a homogeneous product with a simplification of the work process, and can be easily and quickly manufactured and installed lightweight foam concrete without any equipment, lightweight, insulation It is possible to paint, reinforced sound insulation and fireproof strength, and can be used to manufacture lightweight foam concrete easily and quickly at a low cost, which will give a great satisfaction to building manufacturers.

1 is a cross-sectional view showing that the lightweight foam concrete of the present invention is poured on the non-bearing wall.

<Explanation of symbols for each major part of drawing>

10: lightweight foam concrete 20: non-bearing wall 30: cement board

40: gypsum board

Claims (2)

In lightweight foam concrete for cast in place: 20 to 30 parts by weight of aluminum fine powder, 20 to 30 parts by weight of acetic acid-based activated carbon compound, 20 to 30 parts by weight of alpha olefin anion as a surfactant, and 20 to 30 parts by weight of alkyl benzene anion. Solid phase self-foaming agent composition, characterized in that the compound is prepared by aging at 4 ~ 6 hours 18 ~ 40 ℃. 0.1 to 0.5 parts by weight of a solid powder magnetic foaming agent prepared by stirring and mixing an aluminum fine powder, an acetic acid activated carbon compound, an alpha olefin anion which is a surfactant, and an alkylbenzene anion, and 70 to 80 parts by weight of Portland cement, and 20 to 30 silica sand. By weight, 1 to 5 parts by weight of quicklime, 1 to 5 parts by weight of silica blemishes are mixed to produce a functional lightweight magnetic foamed cement: 30 to 40 parts by weight of water is mixed to 60 to 70 parts by weight of the functional foamed cement. Lightweight foam concrete.