KR102369992B1 - Manufacturing Method of Non-Baked Reinforced Enzyme Brick - Google Patents

Abstract

The present invention relates to a non-fired brick that has not undergone a firing process, and is manufactured into a brick that expresses a compressive strength of 10 MPa or more without a firing process using only clay, silt, and sand using an enzyme-based soil stabilizer by termite saliva replication enzyme. It relates to a method for manufacturing an enzyme brick.
Non-fired reinforced enzyme brick manufacturing method according to the present invention, clay 55 to 85 parts by weight; Silt 10 to 20 parts by weight; 0 to 20 parts by weight of sand; a kneading step of mixing and kneading an enzyme-based soil stabilizer and water in a powder composition composed of; A forming step of vacuum forming the kneaded material; A drying step of drying the molded product first for 10 to 20 days by natural drying and then drying the secondarily for 10 to 24 hours by thermal drying at 180 to 250°C; A cooling step of naturally cooling the secondary dry matter; and the kneading step is characterized in that it is made while using termite saliva replication enzyme as an enzyme-based soil stabilizer.

Description

Manufacturing Method of Non-Baked Reinforced Enzyme Brick

The present invention relates to a non-fired brick that has not undergone a firing process. Non-fired reinforced bricks that express a compressive strength of 10 MPa or more without a firing process using only clay, silt, and sand using an enzyme-based soil stabilizer by termite saliva replication enzyme It relates to a method for manufacturing an enzyme brick.

Clay brick is one of the oldest building materials made from clay minerals as the main raw material. It is known that around 4000 BC, a house of raw (non-fired) clay brick was built during the Schmel cultural period in Mesopotamia, and a house of calcined clay brick was built in Egypt around 3000~3500 BC. As described above, the clay bricks that have been with human culture have many advantages, such as being able to freely change shape and color, high compressive strength, strong resistance to weathering, and easy to control absorbency.

Because calcined clay bricks are hardened through the firing process at a high temperature of 1000°C or higher, they have higher strength than non-fired clay bricks. In Korea, calcined clay bricks are mainly used, but in Southeast Asia and Africa, buildings are economically constructed using non-baked clay bricks made from local soil.

Non-fired clay bricks are made by compressing soil with a certain ratio of moisture and clay with human force or a press machine. Bricks can be produced inexpensively and efficiently. However, the strength is not sufficient, and parts exposed to rain and wind such as exterior walls are prone to breakage or cracks, so continuous maintenance is required. In order to improve this drawback, a hardening agent such as cement, quicklime, fly ash, etc. is mixed with the clay to make it. However, the method of adding the solidifying agent has disadvantages in that the solidifying agent such as cement, quicklime, fly ash is not environmentally friendly and is weak against moisture.

On the other hand, the required strength of bricks as a building material is different for each standard. For example, ASTM requires 8.6 MPa or more, UK standard requires 5 MPa or more, and Singapore standard requires 5.2 MPa or more.

KR 10-2015-0019745 A

The present invention was developed to propose a new eco-friendly non-fired clay brick manufacturing technology. Using only eco-friendly materials including local soil, it is possible to produce a non-fired clay brick that exhibits a compressive strength of 10 MPa or more without a firing process and is stable in moisture. There is a technical problem to provide a method for manufacturing a plastic reinforced enzyme brick.

The present invention in order to solve the above technical problem, clay 55 to 85 parts by weight; Silt 10 to 20 parts by weight; 0-20 parts by weight of sand; a kneading step of mixing and kneading an enzyme-based soil stabilizer and water in a powder composition composed of; A forming step of vacuum forming the kneaded material; A drying step of drying the molded product first for 10 to 20 days by natural drying, and then secondarily drying the molded product by thermal drying at 180 to 250° C. for 10 to 24 hours; A cooling step of naturally cooling the secondary dry matter; and the kneading step provides a non-fired reinforced enzyme brick manufacturing method, characterized in that it is made while using termite saliva replication enzyme as an enzyme-based soil stabilizer.

According to the present invention, since only eco-friendly materials including local soil are used in manufacturing non-fired clay bricks and there is no firing process, eco-friendliness and economic feasibility can be secured. In addition, it can be manufactured as a non-fired clay brick that exhibits compressive strength of 10 MPa or more and stability against moisture while reducing the curing period. As a result, the non-fired clay brick manufactured according to the present invention can be advantageously applied as an economical and stable building material.

The present invention relates to a non-fired brick that has not undergone a firing process, and manufactured as a non-fired reinforced enzyme brick that expresses a compressive strength of 10 MPa or more without a firing process using only clay, silt, and sand using an enzyme-based soil stabilizer by termite saliva replication enzyme It has a characteristic.

Specifically, the non-fired reinforced enzyme brick manufacturing method according to the present invention comprises: 55 to 85 parts by weight of clay; Silt 10 to 20 parts by weight; 0 to 30 parts by weight of sand; a kneading step of mixing and kneading an enzyme-based soil stabilizer and water in a powder composition composed of; A forming step of vacuum forming the kneaded material; A drying step of drying the molded product by natural drying for 10 to 20 days, and then drying the secondarily for 10 to 24 hours by thermal drying at 180 to 250°C; A cooling step of naturally cooling the secondary dry matter;

The kneading step is a step of preparing raw materials for manufacturing clay bricks and mixing the raw materials. As raw materials, only eco-friendly materials such as clay, silt, sand, enzyme-based soil stabilizer, and water are used. Bricks are manufactured by binding and coagulating a powder composition composed of clay, silt, and sand using an enzyme-based soil stabilizer together with water. Accordingly, the completed enzyme brick can secure eco-friendliness without fear of releasing harmful substances.

In particular, the present invention uses a termite saliva replication enzyme as an enzyme-based soil stabilizer from raw materials, where the termite saliva replication enzyme is developed as an organic material by mimicking the properties of the enzyme secreted by termites, and representatively Eko-Soil (Eco Enviro Services (Aust) ) Pty, Ltd.). Eko-Soil is an enzyme-based soil stabilizer fermented with organic materials, which is environmentally safe, 100% biodegradable, non-toxic and non-toxic, and interacts with clay to accelerate cohesion and reduce water usage. In this case, it is more preferable to pulverize the clay using a disk mill or the like to have an appropriate particle size distribution for effective reaction with the enzyme-based soil stabilizer.

In the kneading step, the powder composition is clay 55-85 parts by weight; Silt 10 to 20 parts by weight; 0 to 20 parts by weight of sand; it is preferable to prepare the composition with enzyme-based soil stabilizer and water in a 1:150 to 400 weight ratio mixed with enzyme water for uniform dispersion, in this case 100 parts by weight of the powder composition It is preferable to mix 15 to 20 parts by weight of enzyme water. Here, in the powder composition, the content of clay should be greater than that of silt and sand, and the content of silt should be greater than that of sand.

The forming step is a step of shaping the kneaded material into a brick shape, and vacuum forming is performed to form a tight cross-section of the brick. The molding step may be performed in a manner that the kneaded material is extruded by a vacuum pulverizer and cut to a predetermined size.

The drying step is a step of solidifying the molded product, and in the present invention, it proceeds by dividing the first and the second. Primary drying is a natural drying step, which activates the coagulation action by the enzyme-based soil stabilizer. It solidifies by natural drying due to the agglomeration action of the enzyme-based soil stabilizer, and strength can be expressed up to 3 MPa or more. Secondary drying is a step to ensure drying of the moisture inside the block remaining in the thermal drying step. Heat of 180~250℃ is applied to evaporate the moisture remaining inside while stably stabilizing the clay coagulated in the first step. It becomes a step of hardening by heat drying, and as it becomes harder by heat drying, it becomes possible to express strength up to 10 MPa or more.

The cooling step is a step of naturally cooling the secondary dried material that has undergone thermal drying. This completes the non-fired clay brick that exhibits a compressive strength of 10 MPa or more without a firing process.

Hereinafter, the present invention will be described in detail based on Preparation Examples and Test Examples. However, the following preparation examples and test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

[Test Example 1] Characteristics of non-fired enzyme bricks 1

[Table 1] to [Table 3] below the powder composition having the same properties, Eko-Soil ((Eco Enviro Services (Aust) Pty, Ltd.)) and water in a weight ratio of 1:300 mixed with enzyme water After preparation, 16 parts by weight of enzyme water was added to 100 parts by weight of the powder composition and mixed, and then discharged and cut with a vacuum pulverizer, and vacuum formed into an enzyme brick of 19 cm (length) × 9 cm (width) × 6 cm (height). The vacuum-formed enzyme bricks were dried and cured in a room with an average temperature of 18℃ and a humidity of 62.6%. The measurement results are shown in [Table 4] and [Table 5] below.

[Table 1] Material composition of powder composition

[Table 2] Particle size distribution of powder composition

[Table 3] Mineral properties of the constituent materials of the powder composition

[Table 4] Compressive strength by curing period

[Table 5] Absorption coefficient and absorption rate after curing for 28 days

As shown in [Table 4] and [Table 5] above, the compressive strength increased as the curing period elapsed, and in particular, it was confirmed that it was expressed above 5 MPa after 20 days of the curing period had elapsed.

[Test Example 2] Characteristics of non-fired enzyme bricks 2

In the powder composition prepared with the composition of T7 of [Test Example 1], an enzyme brick was prepared in the same manner as in Test Example 1 using the enzyme water prepared in the same ratio as in [Table 6] below, and 28 for the prepared enzyme brick After curing, compressive strength, absorption coefficient and absorption rate were measured. The measurement results are shown in [Table 7] and [Table 8] below.

[Table 6] Enzyme water composition

[Table 7] Compressive strength after curing for 28 days

[Table 8] Absorption coefficient and absorption rate after 28 days of curing

In [Table 7] and [Table 8] above, it was confirmed that as the concentration of the enzyme in the number of enzymes decreased, the compressive strength decreased and the absorption rate increased. However, even at a low concentration of 1:650, it is possible to express a compressive strength of 5 MPa or more, and since it is confirmed that the absorption rate is about 20%, it is expected that the amount of enzyme can be minimized from this.

[Test Example 3] Characteristics of non-fired enzyme bricks 3

In the case of the T2, T4, T6, and T7 specimens in the enzyme bricks prepared as in [Test Example 1], after 14 days of curing, heat-drying curing was performed at 200°C, and the compressive strength according to the heat-drying period was measured. The compressive strength measurement results are shown in [Table 9] below.

[Table 9] Compressive strength by heat drying period

As shown in [Table 9] above, it was confirmed that when heat-drying for more than 12 hours, compressive strength of 10 MPa or more was expressed. According to these results, the enzyme bricks manufactured according to the present invention are manufactured into bricks that express 10 MPa or more while undergoing a short curing period without a firing process.

Claims (2)

delete 55 to 85 parts by weight of clay; Silt 10 to 20 parts by weight; 0 to 20 parts by weight of sand; a kneading step of mixing and kneading a powder composition composed of an enzyme-based soil stabilizer and water;
A forming step of vacuum forming the kneaded material;
A drying step of drying the molded product first for 10 to 20 days by natural drying, and then secondarily drying it for 10 to 24 hours by thermal drying at 180 to 250°C;
A cooling step of naturally cooling the secondary dry matter;
The kneading step uses termite saliva replication enzyme as an enzyme-based soil stabilizer, mixes an enzyme-based soil stabilizer and water in a 1:100-400 weight ratio to prepare enzyme water, and 15-20 weight of enzyme water in 100 parts by weight of the powder composition A non-fired reinforced enzyme brick manufacturing method, characterized in that it is made while mixing parts.