KR20060117005A - Concrete substitute of new material using a natual soil and producing method thereof - Google Patents

Abstract

Provided is an eco-friendly concrete using natural soil, which shows excellent adhesion, solidification rate and compression strength, has a light weight, causes no cracking after solidification, and is useful as a building material. The eco-friendly concrete is obtained by the method comprising the steps of: mixing polyvinyl acetate(PVAC) having excellent adhesive property and binding capability, natural soil, water and a surfactant in a predetermined ratio; and curing the mixture at room temperature. In the concrete, the natural soil includes loess, clay including white earth, silt, sand or gravel. The polyvinyl acetate, natural soil, water and the surfactant are mixed preferably in a weight ratio of 5-30:70-95:10-20:0.5-5.

Description

Concrete substitute of new material using a natual soil and producing method

1 is a photograph of a new material concrete produced according to the present invention.

The present invention relates to a new environment-friendly concrete material using natural soil, and a method for manufacturing the same, and more specifically, the adhesiveness, the setting speed and the compressive strength by mixing in a certain ratio with the soil and the adhesive and the surfactant in a normal natural state of a certain size or less The present invention relates to a method for producing excellent natural friendly lightweight concrete.

In general, the main adhesives for construction concrete include cement and asphalt (AP), and these mixed with sand and gravel in a certain ratio are called cement concrete and asphalt concrete, and manufactured from civil and building concrete. ㆍ It is produced and constructed.

The materials commonly used for these concretes, which are commonly used as described above, are aggregates mainly composed of sand and gravel that are primarily processed. Soil, clay, and silt components below sand are major factors that impair concrete durability and chemical resistance. As a result, it is rarely used in important areas of the structure.

Moreover, although concrete using cement and asphalt has been manufactured and produced for a long time in the global construction market, eco-friendly concrete using soil at room temperature has not yet escaped from the R & D stage. In order to do that, more research and development will be needed.

In addition, cement and asphalt, which are the main adhesives of the conventional concrete, are not only complicated in manufacturing facilities and production processes, but also require a lot of time, and also have an arithmetic effect on environmental destruction due to waste concrete generated by construction development. The damage is so great that it is difficult to evaluate.

Accordingly, the present inventors have made a thorough study on the method of using environmentally friendly soil as the main component of concrete while maintaining the required strength of general cement concrete in view of the problems in the conventional concrete as described above. It was completed.

Accordingly, the present invention is to provide a new environmentally friendly lightweight new material concrete manufacturing method that maintains the predetermined compressive strength of the conventional cement concrete, while the environmentally friendly soil as the main component of the concrete, and fasten the setting speed .

Method for producing a lightweight new material concrete using natural soil for achieving the object of the present invention;

Polyvinyl acetate (PVAC), excellent adhesion and bonding properties, characterized in that it is configured by curing at room temperature by mixing a certain ratio of natural natural soil, water and surfactant.

According to another configuration of the invention, the ratio of the polyvinyl acetate (PVAC), conventional natural soil, water and surfactant is 5 to 30: 70 to 95: 10 to 20: 0.5 to 5 by weight. It features.

In the composition ratio according to the present invention, when the ratio of polyvinyl acetate is 5 parts by weight or less, the bonding strength of the concrete is not preferable, and when more than 10 parts by weight, the adhesive strength and the setting speed is fast, but economical and environmental Not preferable in terms of.

According to another configuration of the present invention, the natural soil according to the present invention is preferably clay, including silt, masato, silt, sand, gravel and the like.

In addition, the surfactant that may be used in the present invention is not limited to a specific one, and PKW2005, which is commercially available and easily available, may be used.

In addition, the mixing of the material according to the present invention can be prepared at room temperature by mixing concrete.

Hereinafter, the characteristics of the material used according to the present invention as described above are as follows.

(1) POLYVINYL ACETATE

Polyvinyl acetate, which is used as one component to prepare an eco-friendly concrete according to the present invention and serves as an adhesive, is a resin adhesive having good adhesiveness and bonding property.

In addition, the polyvinyl acetate as one component of the present invention is excellent in transparency, condensation, hardenability and adhesion to maintain the beauty of natural soil inherent, and the conventional concrete and concrete using the PVAC of the present invention In comparison, the physical properties are shown in Table 1 below.

Comparison of physical properties division importance Condensation time (hour: minute) Compressive strength (㎏ / ㎠) Remarks First closing 3 days 7 days 28 days Concrete of the present invention 1.2 2:40 5:10 232 348 391 Application of cement test method (Ssangyong Conventional cement concrete 3.15 3:30  5:50 233 295 361

(2) natural soil

The natural soil used in accordance with the present invention is masato, clay including clay, silt and sand, gravel, etc. In the case of eco-friendly concrete according to the present invention using the soil which was not used in conventional cement concrete and asphalt concrete as the main material It can be used as a representative sample of high quality natural soil which can be easily obtained anywhere in the construction site.

The natural soil used in the examples according to the present invention used was the soil of Baekseok-ri, Seokri-ri, Yeongju-myeon, Yeoju-gun, Gyeonggi-do, and after removing the topsoil, the soil mined from a clean soil layer was filtered and then used to simply remove impurities.

The results of the physical properties of the natural soil are shown in Table 2 below.

Property test result of natural soil Kinds Maximum dimension (mm) importance Soil classification rdmax LL PL PI # 200 sieve pass rate (%) Remarks Natural Soil 1 40 2.65 SC 1.911 28.5 11.3 7.2 38.7 D Natural Soil 2 40 2.64 ML 1.906 33.2 24.7 8.5 52.3 D

                              * Country of origin: Baekseok-ri, Neungseo-myeon, Yeoju-gun, Gyeonggi-do

The present invention constituted as described above is not only to maintain the natural beauty of the soil by using a normal natural soil as a main material, but also durable, fire resistance, chemical resistance, It is eco-friendly concrete that satisfies the economic feasibility and constructability.It is used for interior and exterior decoration materials, bricks, various blocks, tiles, large and small structures, dikes, firewalls, paving concrete, repair and reinforcement materials, etc. Can be used.

Hereinafter, although an Example demonstrates this invention in detail, of course, it is not limited to the scope of the present invention.

Example 1

Eco-friendly concrete according to the present invention was prepared as follows by each composition having the characteristics shown in Table 3 as the composition ratio of Table 3.

Unit weight (㎏ / ㎥) Soil size (mm) PVAC water Natural soil Surfactant (PKW2005) Gross weight 40 100 200 1879 10 2189

In the method of compounding and mixing the ingredients at the mixing ratios as shown in Table 3, first, the weighed soil is put into the blender.

Then, the water tank was filled with the metered water, and mixed with polyvinyl acetate and PKW2005 (PP) mixed with polyvinyl acetate and a surfactant were put in the water tank and diluted and mixed for about 30 seconds.

Water was sufficiently diluted and mixed in the water bottle was finally mixed with the soil for 3 minutes in a mixer until a uniform concrete to prepare a concrete.

Example 2

Concrete was prepared in the same manner as in Example 1 except that the composition ratio according to the present invention is as shown in Table 4 below.

Unit weight (㎏ / ㎥) Soil size (mm) PVAC water Natural soil Surfactant (PKW2005) Gross weight 40 150 200 1768 10 2148

Example 3

Concrete was prepared in the same manner as in Example 1 except that the composition ratio according to the present invention is as shown in Table 5 below.

Unit weight (㎏ / ㎥) Soil size (mm) PVAC water Natural soil Surfactant (PKW2005) Gross weight 40 200 200 1657 10 2067

Experimental Example

The raw concrete of eco-friendly concrete manufactured according to the above examples was prepared using a 10 * 20 cm mold according to KSF2406 to prepare a test specimen for concrete compressive strength, and prevented water evaporation to demould after 24 hours to cure in water and then to compressive strength. The test results are shown in Table 6 below.

Compressive strength (㎏ / ㎠) division Elapsed time 3 days 7 days 28 days Example 1 258 341 368 Example 2 271 376 406 Example 3 295 408 446

As can be seen in the above examples and experimental examples, according to the present invention, PVAC, natural soil (mass clay, clay including clay, silt, sand, gravel, etc.), water and surfactant (PKW2005) at a constant ratio at room temperature. Concrete obtained by mixing and using shows good compressive strength.

In addition, in the present invention, it is not necessary to pick out a gravel lump in which the natural soil used is specifically mixed in the soil, and the construction procedure is simple and economical because only a 40 mm screen can be used to pass through the material.

As can be seen in the above embodiment, natural soil composed of masato, clay including clay, silt, sand, gravel, etc. used as the main material in the present invention is easy to obtain the material, and does not undergo special processing and production procedures. It is easy to collect around the general construction site, and it is convenient to use, but the test result necessary to obtain the required compressive strength to be used for the structure is greater than the required compressive strength (210 ~ 240㎏ / ㎠) of the general structure currently being constructed. It can be seen that the strength is satisfied. In addition, if the required compressive strength required by the structure is particularly high due to the characteristics of the site, concrete having a specific strength can be created by adjusting the mixing ratio of PP blended with natural soil as needed, which satisfies economic efficiency, durability, and workability. It is possible to manufacture concrete of eco-friendly new material and construct it on site.

In addition, Figure 1 is a picture of the concrete is made and cured according to the present invention, as can be seen in this figure can maintain the natural beauty of the soil on the surface constructed by using the general natural soil as the main material.

In particular, the new eco-friendly concrete material using natural soil according to the present invention can maintain a strength of more than 90% in a short period of 7 days to maintain the compressive strength 350kg / cm ² level, as shown in Table 1, there is no crack It was confirmed (see Fig. 1). In addition, while the specific gravity of the conventional cement concrete is 3.15, it can be seen that the specific gravity of the new material concrete of the present invention is lightweight as 1.2, and furthermore, it can be recycled as waste before and after construction work.

The production method of concrete using natural soil of the present invention configured as described above is prepared by using a mixture of polyvinyl acetate and natural soil as well as maintaining natural beauty of the soil by using ordinary natural soil as a main material. Eco-friendly concrete material that satisfies the durability, fire resistance, chemical resistance, economical efficiency, workability, eco-friendliness, and light weight of eco-friendly concrete. It is a useful invention that can be used in place of conventional cement concrete for various structures such as small structures, dykes, barriers, paving concrete, and repair and reinforcement materials.

Claims (4)

Polyvinyl acetate (PVAC), which has excellent adhesion and bonding properties, manufactures lightweight new material concrete using natural soil, which is composed by mixing normal natural soil, water, and surfactant at a predetermined ratio and curing at room temperature. Way. The method of claim 1, wherein the natural soil is ocher, clay including masato, silt, sand, gravel. The method of claim 1 or 2, wherein the ratio of the polyvinyl acetate (PVAC), conventional natural soil, water, and the surfactant is in a weight ratio of 5 to 30: 70 to 95: 10 to 20. : Method for producing lightweight new material concrete using natural soil, characterized in that 0.5 to 5. Eco-friendly lightweight new material concrete produced by the method of claim 1.

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