KR101571700B1 - A Base Concrete Composite Using Effective Micro-organisms and the Base Concrete Product Thereby - Google Patents

Abstract

According to the present invention, a base concrete composition, including waste concrete fine powder, recycled aggregate flour, cement, water, and a high performance AE water-reducing agent, is produced. Base concrete for support a fence is manufactured by mixing the recycled aggregate and effective microorganisms to recycle resources. At the same time, a base concrete block having appropriate fixation performance is manufactured. An eco-friendly environment is made by supplying microorganisms directly to the soil. A mixing ratio of the aggregate and cement is 4.1-4.4 wt% of the aggregates with respect to 1 wt% of the cement. A ratio (W/C) of water to the cement is 10-15%. With respect to the cement, 0.04-0.06 wt% of the high performance AE water-reducing agent is used. The composition includes 0.05-0.08 wt% of an effective microorganism solution with respect to the total weight of the composition. The aggregate has a particle size of 3-13 mm obtained by crushing waste concrete and recycled aggregate. The aggregate includes 25-40 wt% of an aggregate with a particle size of 3-8 mm and 30-80 wt% of an aggregate with a particle size of 8-13 mm. A fence base concrete product, manufactured by using effective microorganisms, is manufactured by: molding the fence base concrete composition, produced by using effective microorganisms, in a vibration and pressurization molding method through a precast method; curing the fence base concrete composition in a steam curing apparatus by using saturated steam; leaving the fence base concrete composition at 10-20 deg. C for 3-4 hours; increasing the temperature by 10 deg. C per hour and maintaining the maximum temperature of 65-80 deg. C for 4-6 hours; and then naturally cooling the fence base concrete composition.

Description

Technical Field [0001] The present invention relates to a fence-based concrete composition using useful microorganisms and a base concrete product using the same.

The present invention relates to a fence-based concrete composition using useful microorganisms and a base concrete product using the same. More particularly, the present invention relates to a foundation concrete for supporting a fence, which comprises a mixture of industrial by-products and recycled aggregates together with useful microorganisms, And to provide a fence-based concrete composition using a useful microorganism capable of producing an environmentally friendly environment by directly supplying microorganisms to the soil, and a base concrete product using the fence-based concrete composition.

In general, when constructing a fence using a wire mesh or the like, it is necessary to use a foundation stone to support the support of the fence on the ground, or to use a foundation concrete concrete product directly on the site, and then to support the fence I am using it.

However, there are problems in that existing types of existing works for laying foundation concrete products in the field delay the air of the fence construction and inconvenience of making new foundation concrete products after using the formwork in the field and increase the labor cost .

Accordingly, in recent years, a fence has been constructed by applying a basic concrete block manufactured and manufactured in a batch so as to have various shapes and specifications.

As a conventional technique disclosed by the applicant of the present invention in connection with the above-mentioned foundation concrete for fence construction, Korean Patent Laid-Open Publication No. 105093 (2012.09.25.) Discloses a foundation concrete which is embedded at a certain depth in the ground, A fence post fixation structure constituting a post installation hole penetrating a center portion of a foundation concrete so that a fence post can be inserted and fixed to a foundation concrete, characterized in that the fence post fixation structure has a structure A plurality of wedge grooves to be formed; And a plurality of wedges inserted into each of the plurality of wedge grooves to hold the fence pillars, thereby fixing the fence pillars in the floating state of the fence, have.

However, the concrete aggregate used in most of the existing foundation concrete, including the foundation concrete used for fixing the fence pillars described above, is manufactured by mixing cement, sand, gravel, and admixture with water, and as a raw material of concrete, , It is difficult to supply and receive aggregate due to the lack of natural resources and the cost of purchasing the aggregate is high, so that the manufacturing cost of the product is increased.

As a prior art disclosed to solve the above problems, Korean Patent Registration No. 919493 (Sep. 22, 2009) discloses a recycled aggregate covered with a water-based water repellent agent and a concrete composition using the same. The aqueous water repellent agent is added to a circulating coarse aggregate There is known a concrete composition in which the performance of the recycled aggregate is improved so that it can be used as an aggregate for concrete.

However, in the case of the above-mentioned conventional concrete composition, the performance of the recycled aggregate which is unsuitable for the use of the recycled aggregate alone has been improved. However, since the strength and durability of the base concrete block product are so low that the product is easily damaged during transportation, Is short.

Also, in the case of the base concrete block made of the conventional concrete composition, since the product is embedded in the soil, the microorganisms of the soil are difficult to survive due to the high pH component of the concrete, thereby damaging the environment around the product.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an aggregate of cement and recycled aggregate stone at an optimum weight ratio, together with water cement and admixture, It is an object of the present invention to provide a fence-based concrete composition using useful microorganisms capable of minimizing the unit cost and enhancing the strength and durability of a basic concrete block product, and a basic concrete product using the same.

In addition, the present invention provides a fence-based concrete composition using useful microorganisms capable of survival of soil microorganisms by supplying microorganisms from soil-buried products to soil, And a base concrete product using the same.

The fence-based concrete composition using the useful microorganisms according to the present invention comprises a basic concrete composition comprising cement, water and a high-performance AE water reducing agent in the aggregate of waste concrete fine powder and recycled aggregate stone, wherein the mixing ratio of the aggregate and the cement is (W / C) of cement to 10 to 15%, and the high performance AE water reducing agent is used in an amount of 0.04 to 0.06% by weight based on the cement, The composition is prepared by using 0.05 to 0.08% by weight of a useful microorganism stock solution relative to the total composition amount.

The aggregate is formed by crushing waste concrete and recycled aggregate and using aggregates having a particle size of 3 to 13 mm. The aggregate is composed of 25 to 40% by weight of aggregates having a particle size of 3 to 8 mm, aggregates having a particle size of 8 to 13 mm, 80% by weight.

The high performance AE water reducing agent is made using a polycarboxylic acid-based admixture.

The useful microorganism stock solution is prepared by mixing common natural water with rice soot, and mixing the natural water with rice water at an 8: 2 weight ratio.

The fence-based concrete product using the useful microorganisms according to the present invention is formed by molding with a fence-based concrete composition using the useful microorganisms.

The above-mentioned fence-based concrete product is removed by vibration press-forming method so that it can be constructed through precast method.

Wherein the curing is carried out at a temperature of 10 to 20 占 폚 for 3 to 4 hours and a temperature of 10 占 폚 per hour to a maximum of 65 to 80 占 폚 4 to 6 hours, and then naturally cooled.

According to the fence-based concrete composition using the useful microorganism according to the present invention and the base concrete product using the same, the aggregate of the waste concrete fine powder and the recycled aggregate stone is mixed with the cement in a weight ratio of 1: 4.1 to 4.4 and the high performance AE water reducing agent %, It is possible to accelerate the recycling of resources as well as the aggregate supply and demand smoothly. By lowering the production cost of products, it is possible to improve the price competitiveness of the products, improve the basic physical properties and durability of the products, The effect can be obtained.

In addition, since the fence-based concrete composition using the useful microorganism according to the present invention and the basic concrete product using the microorganism according to the present invention are constituted by using 0.05 to 0.08% by weight of the useful microorganism stock solution, the microorganism can be directly supplied to the soil It is possible to protect environment surrounding the microorganism from the survival of microorganisms, and to produce and provide eco-friendly products.

In addition, the fence-based concrete composition using the useful microorganisms according to the present invention and the basic concrete product using the microorganisms according to the present invention mix raw water with rice flour at an 8: 2 weight ratio to provide a useful microorganism stock solution, It is possible to further improve the eco-friendly function of the product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view illustrating an embodiment of a fence-based concrete product using the useful microorganism according to the present invention. FIG.

The present invention provides a basic concrete composition comprising cement, water and a high-performance AE water reducing agent in aggregate of waste concrete fine powder and recycled aggregate stone, wherein the mixing ratio of the aggregate to the cement is in a weight ratio of 4.1 to 4.4 (W / C) of cement to water is 10 to 15%, and the high performance AE water reducing agent is used in an amount of 0.04 to 0.06% by weight based on the cement, And 0.05 to 0.08% by weight of an undiluted solution is used as a fence-based concrete composition.

The aggregate is formed by crushing waste concrete and recycled aggregate and using an aggregate having a particle size of 3 to 13 mm. The aggregate is composed of 25 to 40% by weight of aggregate having a particle size of 3 to 8 mm and aggregate having a particle size of 8 to 13 mm To 80% by weight of a microorganism based on the composition of the present invention.

Also, the high-performance AE water reducing agent is characterized by a technical feature of a fence-based concrete composition using a useful microorganism using a polycarboxylic acid-based admixture.

The present invention also provides a fence-based concrete composition using the beneficial microorganism in which the natural microbial broth is prepared by mixing common natural water with rice soot, and mixing natural water and rice flour at an 8: 2 weight ratio.

The present invention also provides a fence-based concrete product using a useful microorganism formed by molding a fence-based concrete composition using useful microorganisms.

Also, the fence-based concrete product is characterized by the construction of the fence-based concrete product using the useful microorganisms manufactured by the vibration press forming method so as to be able to work through the precast method.

Also, the fence-based concrete product is cured by using saturated water vapor in a vapor blanket after molding, and the curing is performed at a room temperature of 10 to 20 ° C for 3 to 4 hours and a temperature of 10 ° C / . The fence-based concrete product using the beneficial microorganism having the benthic condition of keeping it for 4 to 6 hours is naturally characterized.

Next, preferred embodiments of the fence-based concrete composition using the useful microorganisms according to the present invention will be described in detail with reference to the drawings.

First, one embodiment of the fence-based concrete composition using useful microorganisms according to the present invention comprises cement and water, a high-performance AE water reducing agent, and a stock solution of useful microorganisms.

The aggregate is composed of waste concrete fine powder and recycled aggregate stone.

The aggregate may be any of aggregate of waste concrete fine powder or recycled aggregate, or may be a mixed aggregate of waste concrete fine powder and recycled aggregate.

The aggregate is an aggregate of waste concrete and recycled aggregate, and is formed of aggregate having a particle size of 3 to 13 mm.

The aggregate is composed of 25 to 40% by weight of aggregates having a particle size of 3 to 8 mm and 30 to 80% by weight of aggregates having a particle size of 8 to 13 mm. That is, in the case of the aggregate having a particle size of 3 to 8 mm, the size of the single pore can be increased but the strength can be increased. On the other hand, in the case of the aggregate having the particle size of 8 to 13 mm, the size of the single pore is relatively large, The aggregate is mixed and applied to form an aggregate having sufficient strength while maintaining a proper porosity.

The mixing ratio between the aggregate and the cement is 1: 4.1 ~ 4.4. That is, the weight ratio of aggregate 4.1 to 4.4 is mixedly applied to Cement 1.

In the above, the water cement ratio (W / C), that is, the ratio of water to cement is 10 to 15%.

The high performance AE water reducing agent is constituted by using 0.04 to 0.06% by weight based on cement.

When the high performance AE water reducing agent is used in an amount of less than 0.04% by weight based on the cement, it is difficult to exert the function of the high performance AE water reducing agent, so that the fluidity of the cement paste is rapidly lowered and workability can not be ensured. By weight based on 0.06% by weight, the rise of the raw material cost and the rigidity are lowered.

As the high-performance AE water reducing agent, various admixtures such as polycarboxylic acid type, melamine type, and naphthalene type are disclosed, but the high performance AE water reducing agent in the present invention is constituted by using a polycarboxylic acid type admixture.

In general, high performance AE water reducing agent based on polycarboxylic acid system is superior in dispersion effect, so it can obtain high fluidity concrete even at low water cement ratio, and suppresses the change of slump over time due to steric effect due to interaction of polymer adsorption layer And is excellent in high fluidity and fluidity.

When such a high-performance AE water reducing agent is used as described above, it is possible to produce a product which is smoothly demolded and freeze-thawed during vibration pressing for molding.

The above composition is prepared by using a stock solution of a useful microorganism capable of expressing a useful microorganism in a product group in accordance with the fact that the product is contained in the soil in an overall formulation.

Examples of the useful microorganism stock solution include lactic acid bacteria, yeast bacteria, sulfuric acids and the like. In the case of lactic acid bacteria, they have a beneficial effect of preventing corruption and inhibit the growth of harmful microorganisms and decomposition and decomposition of organic acids in the anaerobic state Solubilization of decomposable organic matter, prevention of disorder of undissolved organic matter, and fermentation decomposition of organic matter. On the other hand, yeast fungi are aerobic bacteria and have fermentative ability. They synthesize effective substances by using amino acids, saccharides and other organic substances produced by photosynthetic bacteria as a substrate and produce substrates required for propagation of lactic acid bacteria and actinomycetes, .

The useful microorganism stock solution is constituted by 0.05 to 0.08% by weight based on the total composition (aggregate, cement, water, high-performance AE water reducing agent, etc.).

If the amount of the microorganism stock solution is less than 0.05 wt%, it is difficult to reproduce the useful microorganisms of the concrete product group. If the amount of the microorganism stock solution is more than 0.08 wt%, the cost of the raw material of the concrete product group is increased.

As described above, when 0.05 to 0.08% by weight of the useful microorganism solution is used for the composition, microorganisms are directly supplied to the soil from the buried products to protect the environment surrounding the survival of the useful microorganisms and to produce environmentally friendly products It is possible to provide.

The use water of the useful microorganism stock solution is prepared by mixing common natural water with rice soot, and mixing the natural water with rice soot at an 8: 2 weight ratio to provide an environment in which useful microorganisms can survive smoothly The purpose.

By mixing the natural water and rice flour at a weight ratio of 8: 2 as described above, the effective microorganisms can survive more effectively from the product, thereby enhancing the eco-friendly function of the product.

The fence-based concrete product using the useful microorganisms according to the present invention is formed by the fence-based concrete composition using the useful microorganisms described above.

As shown in FIG. 1, the fence-based concrete product (A) is formed in a structure capable of accommodating struts in a vertical direction as shown in FIG. 1, and is manufactured by a vibration pressing method using a molding machine so as to achieve a structure that can be applied through a precast method in the field .

The fence-based concrete product (A) is vibrated through a molding machine to form a vapor, followed by vapor curing.

In the above, the curing of the fence-based concrete product (A) is carried out at a room temperature of 10 to 20 ° C for 3 to 4 hours, the temperature is raised to 10 ° C per hour, maintained at a maximum of 65 to 80 ° C for 4 to 6 hours, Lt; / RTI >

Hereinafter, the present invention will be described in detail with reference to the following examples. However, the present invention is not limited to the following examples.

1. Aggregate manufacturing

Waste concrete and waste earth bricks are crushed with a jaw crusher and then subjected to a physical or chemical treatment process, and the aggregate of the aggregate made to conform to the quality standards stipulated in Article 35 of the "Act on the Promotion of Recycling of Construction Waste" 100 kg of aggregate and 200 kg of aggregate having a particle size of 8 to 13 mm were obtained and cured to have a water content of 0.5%. Then, 60 kg of aggregate having a particle size of 3 to 8 mm and 140 kg of aggregate having a particle size of 8 to 13 mm were mixed, .

2. Specification  Produce

(Example)

The aggregate prepared above was blended with Portland cement in a weight ratio of 1: 4.4, and water cement ratio of 15% and 0.05% by weight of a polycarboxylic acid-based admixture as a high-performance AE water reducing agent were used. 0.08% by weight of the microbial stock solution was put into a mixer and the square specimen having dimensions of 40 × 40 × 40 mm was prepared by KS F 2403 "Method for preparing concrete specimen for strength test of concrete", which was prepared by wet curing for 24 hours and then curing under water .

(Comparative Example 1)

The natural aggregate consisting of sand and gravel was blended with Portland cement in a ratio of 1: 3, and a water cement ratio of 40% was used as a raw material, and the mixture was put into a mixer, and a columnar specimen having the same size as the above- .

(Comparative Example 2)

In Comparative Example 1, the silica fine powder was replaced by 25% by weight, and another mixture ratio was prepared under the same conditions as in Comparative Example 1.

3. Test methods and results

The test specimens prepared above were tested by the following test methods and their physical properties are shown in the table.

1) Compressive strength was measured by KS L 5105 "Test method for compressive strength of hydraulic cement mortar", and the results are shown in Table 1.

division
Compressive strength (MPa) 9th 16th Example 29.0 30.0 Comparative Example 1 14.1 14.4 Comparative Example 2 9.1 9.7

As shown in Table 1, in the case of the embodiment, the compression strength results exceeding the C type standard (16 MPa) of KS F 4004, which is the quality standard of precast concrete bricks, only when the final birthday (28 days) Whereas Comparative Example 1 and Comparative Example 2 using natural aggregate showed a compressive strength two times or more lower than Example 1.

2) Absorption rate was tested by KS F 2476. Here, the water absorption is a phenomenon in which water is humidified by the capillary phenomenon and the hygroscopic phenomenon without external pressure, and the air body is dried at a temperature of 80 ° C for 48 hours, cooled in a desiccator, do. Thereafter, the specimens were immersed in 80 ° C clear water, and after 48 hours, the surfaces of the specimens were wiped with a swab, the mass was measured, and the water absorption was obtained. The results are shown in Table 2.

division Example Comparative Example 1 Comparative Example 2 Quality standards Absorption Rate (%) 6.2 6.7 7.1 below 10

As can be seen from the above Table 2, in the case of the embodiment, it is evaluated that the absorption resistance performance satisfies the quality standard at a level within 60% of the quality standard.

That is, according to the fence-based concrete composition using the useful microorganism according to the present invention and the basic concrete product using the same, the aggregate of the waste concrete fine powder and the recycled aggregate stone is mixed in the weight ratio of 1: 4.1 to 4.4 It is composed of 0.04 ~ 0.06% by weight of high-performance AE water reducer, which improves aggregate supply and demand, speeds recycling of resources and improves price competitiveness of products by lowering the production cost of products, and improves basic properties and durability of products At the same time, it is possible to extend the life of the product.

Although the preferred embodiments of the fence-based concrete composition and the basic concrete product using the useful microorganisms according to the present invention have been described above, the present invention is not limited thereto, And it is also within the scope of the present invention.

A: Fence foundation concrete products

Claims (7)

A basic concrete composition comprising cement, water, and a high-performance AE water reducing agent is used as an aggregate of waste concrete fine powder and recycled aggregate stone. The mixing ratio of the aggregate and the cement is in a weight ratio of 4.1 to 4.4 with respect to the cement 1, (W / C) of 10 to 15%, and the high performance AE water reducing agent is used in an amount of 0.04 to 0.06% by weight based on the cement, 0.05 to 0.08% by weight of a useful microbial stock solution %, And the aggregate is crushed into waste concrete and recycled aggregate to form an aggregate having a particle size of 3 to 13 mm, wherein the aggregate has an aggregate having a particle size of 3 to 8 mm and a particle size of 8 to 13 The present invention relates to a method for forming a fence-based concrete composition using useful microorganisms using a mixture of 30 to 80% by weight of an aggregate and a preliminary casting method, Which is cured, is allowed to stand at room temperature of 10 to 20 ° C for 3 to 4 hours, elevated to a temperature of 10 ° C per hour, maintained at a maximum of 65 to 80 ° C for 4 to 6 hours, Fence foundation concrete products using microorganisms.
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