KR20100105810A - Away manufacturing the mud - plastered wall stone which used jayeonto - Google Patents

Abstract

PURPOSE: A method for manufacturing loam brick using natural soil is provided to have properties of soil without toxicity, to improve flexural strength and flexural toughness of the loam brick by mixing natural earthy and sand with a solidifying agent and a lignin-based admixture, and to economically manufactured the loam brick. CONSTITUTION: A method for manufacturing loam brick using natural soil comprises the following steps: manufacturing 10-20 weight% of a solidifying agent which is comprised of 25-45 weight% of a clinker, 10-30 weight% of zeolite, 10-40 weight% of blast furnace slag powder, and 10-30 weight% of anhydrous gypsum; putting 1,500 kg of soil into a circular mixer, pulverizing the soil with 250 kg of the solidifying agent, inputting 140L of water and 1.4L of a lignin-based admixture, and mixing the materials; compressing the mixture into a brick; and curing the molded loam brick at 80°C for 24 hours.

Description

      Away manufacturing the mud-plastered wall stone which used jayeonTo}

The present invention relates to a soil brick, and more particularly, to an environment-friendly, fast-hardening and high-strength soil brick using a clinker and a liglin-based vegetable additive mainly composed of minerals.

Cement, which is conventionally used as one of brick materials, has many problems due to relatively low flexural strength and flexural toughness compared to compressive strength, and has a weakness that cracks are easily generated by dry shrinkage.

In addition, the cement brick is limited to gray in color, so it is uniform in the surrounding environment regardless of the city or rural area. It is not possible to increase the ambient temperature due to the diffused reflection of sunlight and to integrate with the surrounding nature. If this is the case, a separate waste disposal process is required and accordingly, a separate waste disposal cost is required.

As an alternative to such cement bricks, solidified materials are mixed with soil and above a certain level (10kgf

A method of obtaining uniaxial compressive strength of / cm2) has been proposed, and bricks that develop strength early have been used.

However, since the pH of the conventional brick additive is more alkaline than 10, when used for construction, it emits harmful toxicity to the human body, destroys the growth of living organisms, and has a relatively large environmental load.

Cement, which is conventionally used as one of brick materials, has many problems due to relatively low flexural strength and flexural toughness compared to compressive strength, and has a weakness that cracks are easily generated by dry shrinkage.

In addition, the cement brick is limited to gray in color, so it is uniform in the surrounding environment regardless of the city or rural area. It is not possible to increase the ambient temperature due to the diffused reflection of sunlight and to integrate with the surrounding nature. If this is the case, a separate waste disposal process is required and accordingly, a separate waste disposal cost is required.

The present invention is to solve the conventional problems as described above, the object of the present invention is to prevent resource depletion due to indiscriminate aggregate collection, using the soil or clay soil collected in nature, has strength and diameter properties In other words, by creating various natural colors and textures according to the soil's unique color, it provides environment-friendly and non-toxic soil bricks with minimal cost.

In order to achieve the above technical problem, the present invention is 25 to 45% by weight clinker powder based on minerals; 10-30 wt% zeolite; Blast furnace slag fine powder 10-40 wt%; 10 to 20% by weight of the solidifying agent consisting of 10 to 30% by weight of anhydrous gypsum to 80 to 90% by weight of earth and sand, 0.2 to 1.2% by weight of the admixture provides a composition for earth brick.

Soil composition according to the invention and the soil brick produced using the same has the following effects.

First, the soil brick composition according to the present invention is economical by producing soil brick using all the soil as a main material.

Secondly, the soil brick according to the present invention has the property of expressing rapid hardening strength in the early age, and can obtain a high strength of 80 ~ 240kgf / cm 2 according to the amount of the composition used.

Third, the soil brick produced using the soil composition according to the present invention improves the flexural strength and the flexural toughness compared to the compressive strength which is the biggest disadvantage of the existing cement brick.

Fourth, the soil brick of the present invention exhibits neutrality without detection of heavy metals, and can grow organisms, and when produced with soils such as ocher, it can improve the health of users by releasing far-infrared rays beneficial to the human body. In addition, if a long time passes during disposal, it is possible to return to nature through the weathering process, thus reducing the waste disposal cost.

Fifth, the soil brick of the present invention has the effect of reducing the surface freezing in winter, and has the effect of improving the service life. This is provided.

In order to achieve the above technical problem, the present invention is 25 to 45% by weight of clinker powder based on the Arwin-based mineral in 8 to 90% by weight of earth and sand; 10-30% by weight of cement; Blast furnace slag fine powder 10-40 wt%; It provides a composition consisting of 10 to 20% by weight of a solidifying agent composed of 10 to 30% by weight of anhydrous gypsum, 0.2 to 1.2% by weight of a liglin-based admixture.

As described above, the features and functions of the respective components constituting the composition for soil brick according to the present invention will be described in detail.

The hardener according to the present invention is obtained by mixing about 30 to 40% by weight of limestone, about 30 to 50% by weight of low-grade bauxite and about 10 to 20% by weight of gypsum as raw materials, firing and cooling at 1300 ° C.

Such a hardener to form the ettringite or monosulfate by reacting with the gypsum upon hydration to make the composition for high-strength soil brick of the present invention fast-hardening, it is possible to express strength quickly. Ettlingite hydrates formed together are particularly suitable for the present invention because they have a large number of bonds, have high strength properties, and have properties that are produced even in the presence of organic matter.

The powder level of the solidifying agent is 3,000 ~ 8,000 cm 2 / g of the specific surface area of the brain, 5,000 ± 500 cm 2 / g is most preferred.

This Blaine specific surface area is an important factor affecting the initial reaction rate, and the higher the specific surface area, the faster the reaction rate.

Examples of gypsum used in the present invention include anhydrous gypsum, hemihydrate gypsum and dihydrate gypsum, or because anhydrous gypsum has a slow dissolution rate compared to hemihydrate gypsum and dihydrate gypsum, and is suitable for reactivity with Irwin minerals. It also contributes to the stability of the brick

The blast furnace slag fine powder to be used in the present invention has a latent hydraulic property as it is a finely divided by drying the granular chain slag obtained by quenching the molten slag produced together with pig iron in the furnace. The reactivity of blast furnace slag powder is generally higher with higher basicity and vitrification rate, and specific gravity ranges from 2.88 to 2.95.

8,000 cm 2 / g is possible and 6,000 ± 500 cm 2 / g is most preferred.

As the blast furnace slag powder is used, surface activity is increased, and the dissolution rate of Al2O3 is accelerated to promote the formation of ettringite, and also to promote the gelation of CSH-based hydrates and to reduce the unreacted portion. . In addition, the CaO component of the blast furnace slag powder is about 40 to 45% by weight, and the alkalinity is relatively low, which is very effective in reducing the pH eluted from the soil brick.

Lignin-based vegetable additives are preferably used as strength promoters in the present invention. In particular, since the initial strength is excellent even at low temperatures, the production time of the winter brick can be shortened. The admixture includes 60 to 70% by weight of ligline to 3.0 to 4.0% by weight of oxycarbonate, 3.0 to 4.0% by weight of alkynebenzene phosphate, 3.0 to 4.0% by weight of lignin sulfonate, 1.0 to 2.0% by weight of rust inhibitor 12-15% by weight of calcium carbonate is added to the mixture and stirred, and 1.0 to 2.0% by weight of a thickener (cellulose) is used.

The soil brick composition according to the present invention having the above characteristics is 25 to 45% by weight of the clinker powder as a main component, 10 to 30% by weight cement, 10 to 40% by weight fine blast furnace slag, natural type II anhydrous gypsum 10 to 30 Weight%, Admixture 0.2-1.2 weight% is preferable.

Characteristic reactions occurring in the composition for high-strength soil brick of the present invention having the above components are as follows.

1) Formation of Ettlingite Ettlingite is a compound having the chemical formula of 3C3A.CaSO4.32H2O, and it is possible to fix a large amount of water with bound water, thereby reducing the water ratio and constraining the movement of soil particles. Make it possible to join. In addition, the composition of the present invention may contain potassium carbonate, thereby promoting the formation reaction of ettringite, and is excellent in the expression of early strength.

2) pozzolanic reaction.

Soluble powders such as SiO2 and Al2O3 contained in blast furnace slag powder and soil harden to produce Ca (OH) 2 and insoluble hydrates.

3) flocculation of soil particles

As the admixture, lignin sulfinate is used, and when hydrated, pozzolanic reaction occurs to increase strength and maintain non-toxic neutrality.

Next, the soil brick using the composition according to the present invention will be described.

The high-strength composition according to the present invention is mixed with the mixed water of the soil to constitute the soil brick.

The amount of the composition of the present invention is determined according to the characteristics of the soil, the required strength, etc. In general, 100 to 250 kg per 1,500 kg of soil is suitable.

The method of adding and mixing the composition of the present invention is not particularly limited, but a general method of mixing and mixing each component in advance and mixing the soil is most widely used, and it is most important to mix homogeneously.

      The manufacturing method of the present invention will be described as follows.

Firstly, loess soil and masato, such as masato, which are generally obtained from the surface of the earth, can be used. The type of soil is not particularly limited, but a silt component having a particle size of 1.0 to 0.05 mm and fine grains and granules are properly mixed. It is preferable to remove the foreign matter by sifting the soil collected with a vibrating screen 10mm sieve is installed in a ventilated place is subjected to the moisture adjustment process.

1,500kg of the soil moisture adjustment is put in a circular stirrer and stirred to be evenly crushed, which is a soil containing fine particles are absorbed by water, and the crushing process for homogeneity of the product.

250 kg of solidifying agent (FIG. 2a) is added to 1,500 kg (FIG. 2b) of the ground sand which is subjected to the grinding process. The solidifying agent is charged at a constant speed in a powder form, followed by an even grinding mixing process. After mixing, it is added and mixed. At this time, by a premature injection type high pressure spraying machine, an even spray should be made in a large area.

The amount of water input is determined according to the water content of the earth and sand, it is sufficient that the empty formulation that can finally squeeze the soil by hand. It is to allow the production of soil bricks with a minimum amount of water, and to adjust the amount of water input according to the water content.

The composition according to the above method is to have the same characteristics as the general soil before compression molding, it is preferable that the rapid production is made in order to prevent the dryness phenomenon, because the water content is not high, the brick molding machine is applied 30Ton force ( Fig. 2C) is made by applying a force (Fig. 2D).

The clay brick molded by the molding frame was completed by curing at 80 ° C. for 24 hours in a curing room equipped with a steam facility or curing for 5 days in a well-ventilated shade.

The soil brick produced as described above is to improve the problems of the conventional cement brick and to exhibit the unique color and texture of the soil.

<Example 1>

250 kg of solidifying agent was added to 1,500 kg of earth and sand into a stirrer, and 1.4 L of admixture was diluted and added into 140 L of water, and then put into a brick molding machine to which a force of 30 Ton was applied after the second stirring.

At this time, prototype specimens were prepared, and the compressive strength test was commissioned by the Korea Research Institute of Chemical Testing. The test method was conducted as KSF 2405, and the results are shown to be excellent as shown in Table 1.

 Table 2 is commissioned by the Korea Institute of Chemical Testing, it can be seen that there is no toxicity as a result of heavy metal test by ICP analysis after sulfuric acid + nitric acid Kjeldahl decomposition.

                       <Table 1>.

Test Items
unit
result Test Methods
7 days 14 days 28 days Compressive strength MPa 30.3 43.0 56.5 KSF 2405

                              <Table 2>

      Test Items   unit   Sample classification     Results        Test Methods   CD  mg / kg    Not detected ICP analysis after sulfuric acid + nitric acid Kjeldahl   Cu  mg / kg    Not detected            "   Zn  mg / kg    Not detected            "   Ni  mg / kg    Not detected            "   Cr  mg / kg    Not detected            "   Hg  mg / kg    Not detected            "   Pb  mg / kg    Not detected            "   As  mg / kg    Not detected            "

Figure 1 is a real picture of the soil brick embodiment.

Figure 2 shows the production process of the embodiment of the soil brick.

Claims (4)

In the soil brick manufacturing method using natural soil, 25 to 45% by weight of clinker powder based on Irwin mineral; 10-30 wt% zeolite; Blast furnace slag fine powder 10-40 wt%; A first step of mixing and preparing 10 to 20% by weight of a hardener composed of 10 to 30% by weight of anhydrous gypsum; Putting 1,500 kg of the soil adjusted water into a circular stirrer and adding 250 kg of solidifying agent, after mixing evenly pulverizing and mixing 1.4 L of lignin-based admixture with 140 L of water and mixing the mixture; A third step of molding the brick by putting the mixture stirred by the second step into a brick-forming mold; A soil brick manufacturing method comprising the fourth process of curing the soil brick formed by the third process at a curing bath at 80 ° C. for 24 hours. The method according to claim 1, The solidifying agent is a cobbler powder 25 to 45% by weight, zeolite 10 to 30% by weight, blast furnace slag fine powder 10 to 40% by weight, soil brick using natural soil, characterized in that the solidification consisting of 10 to 30% by weight Manufacturing method. The method according to claim 1, The admixture is a soil brick production method using natural soil, characterized in that 1.5 l per 1,500 kg soil lignin-based mixed. In the soil brick manufacturing method using natural soil, Earth brick using natural soil, characterized in that by mixing the solidified 250kg, admixture 1.5ℓ, water 150ℓ per 1,500kg of earth and sand.

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