KR20220033430A - Method of manufacturing construction/civil blocks using sand or construction waste, and construction/civil blocks manufactured thereby - Google Patents

Abstract

Provided is a manufacturing method of a building and civil engineering blocks using sand or building waste. The method includes the steps of: agitating by adding a hardener to at least one of sand and industrial waste; forming and drying a stirred mixture; and sintering the dried molded article at a temperature of 850 to 1250 ℃. Therefore, it is possible to shorten a manufacturing time according to a fast curing rate.

Description

Method of manufacturing construction/civil blocks using sand or construction waste, and construction/civil blocks manufactured thereby

The present invention relates to a method for manufacturing a building/engineering block using sand or building waste, and to a building/engineering block manufactured by the method, and more particularly, to a method for manufacturing a building/civil block using sand or building waste using sand or building waste having a fast curing rate, excellent strength, and excellent elasticity. It relates to a method for manufacturing a building and civil engineering block, and to a building and civil engineering block manufactured thereby.

Recently, the construction period is delayed due to the difficulty in securing high-quality construction materials when performing civil works and construction projects, which increases the cost. By doing so, the problem of destroying the natural environment and disturbing the ecosystem is caused.

Specifically, in the existing port reclamation method, the existing asphalt and concrete paving method, etc., granular materials such as stone are used to damage the mountains for quarrying, and quarrying, transporting, and breaking works are factors that increase the construction cost.

As such, conventional cement stabilization and LAC (Lignin Rosin Asphalt Concrete) methods have been developed and utilized. Due to the low cost, the usable fields were limited to auxiliary base materials for road construction, so the usability was very low.

Korean Patent Laid-Open No. 10-1996-29280 discloses a method for curing industrial waste and soil mixture using a curing agent composition. The curing agent composition used at this time is composed of sodium carbonate 25%, potassium chloride 25%, magnesium carbonate 15%, ammonium chloride 10%, potassium silicate 8%, silicate 7%, iron sulfate 5% and titanium oxide 5%. Although this curing agent is described as having a composition suitable for curing a mixture of industrial waste and soil, it is expensive to manufacture because sodium carbonate and titanium oxide are used as main components, and the strength of the cured product manufactured using the curing agent is also not significantly improved. .

Accordingly, there is still a demand for technology development for building and civil engineering materials that have excellent properties while maintaining the same properties and saving manufacturing time.

Korean Patent Publication No. 10-1996-29280

The present invention has been devised to solve the above disadvantages of the prior art, and an object of the present invention is to provide a method for manufacturing a building/civil block using sand or building waste having a fast manufacturing speed and uniform physical properties.

Another object of the present invention is to provide a building/engineering block using sand or building waste having excellent strength and excellent durability.

In order to achieve the above object, according to an embodiment of the present invention, the step of adding a hardening agent to at least one of sand and industrial waste and stirring; forming and drying the stirred mixture; and calcining the dried molded product at a temperature of 850 to 1250° C.; is provided a method of manufacturing a building/civil block using sand or building waste, including a.

In this case, as the curing agent, 2-(methacryloyloxy)ethyl phosphate monomer and 3-(trimethoxysilyl)propyl methacrylate monomer are added in a molar ratio of 1:1, and normal mercaptan is added to 100 parts by weight of the total monomer. It may contain a polymer prepared by mixing 0.5 parts by weight.

In this case, the polymer may be of the following formula (1).

[Formula 1]

In Formula 1, R1 and R2 are each independently hydrogen or a methyl group, m and n are mole fractions, m is 0.3 to 0.7, n is 0.3 to 0.7, and m + n = 1.

In this case, the weight average molecular weight of the polymer may be 70,000 to 80,000.

In addition, the curing agent may further include sodium chloride, aluminum tris (O-ethyl phosphonate), potassium chloride, calcium chloride, magnesium oxide, sodium sulfate, Na ₂ SiO ₃ , lignin sulfonate, and cement.

The method of manufacturing a building/civil block using sand or building waste of the present invention has the advantage of shortening the manufacturing time according to the fast curing speed, and has the advantage of maintaining uniform physical properties while having excellent strength, excellent elasticity and excellent durability There is this.

1 is a flowchart of a method of manufacturing a building/civil block according to an embodiment of the present invention.
2 is a model diagram of a building/civil engineering block according to an embodiment of the present invention.
3 is a model diagram of a building/civil engineering block according to an embodiment of the present invention.
4 is a schematic diagram of a building/civil engineering block according to an embodiment of the present invention.
5 is a schematic diagram of a building and civil engineering block according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail. Prior to this, the terms or words used in the present specification and claims are not to be construed as being limited to conventional meanings, and the inventor must properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, the configurations described in the embodiments described in this specification are only the most preferred embodiment of the present invention, and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and variations.

1 is a flowchart of a method of manufacturing a building/civil block according to an embodiment of the present invention. Referring to FIG. 1 , the method for manufacturing a building/civil block of the present invention includes a stirring step (S10), a drying step (S20), and a firing step (S30).

The stirring step (S10) is a step of stirring by adding a curing agent to at least one of sand and industrial waste.

In this case, the sand applicable to the present invention may be used alone or in a mixture of sand, sand, and desert sand.

In addition, at this time, the soil may be granite soil, clay soil, river sand, sea sand, natural soil, etc. alone or mixed.

On the other hand, industrial waste applicable to the present invention may be used alone or in combination with sludge, residues, volcanic ash, environmental waste, slag, powder slag, waste concrete and sludge depending on the use, but is not limited thereto.

In addition, the curing agent applicable to the present invention is 1 to 5 parts by weight of the compound represented by the following formula (1), 1-3 parts by weight of sodium chloride, 0.5 to 1 parts by weight of aluminum tris (O-ethylphosphonate), 1 to potassium chloride 3 parts by weight, 1 to 2.5 parts by weight of calcium chloride, 0.2 to 2 parts by weight of magnesium oxide, 0.2 to 1.5 parts by weight of sodium sulfate, 0.2 to 2 parts by weight of Na2SiO3, 0.2 to 1 parts by weight of lignin sulfonate, and 100 parts by weight of cement. there is.

[Formula 1]

In the above formula, R1 and R2 are each independently hydrogen or a methyl group, m and n are mole fractions, m is 0.3 to 0.7, n is 0.3 to 0.7, and m + n = 1.

In this case, the polymer of Formula 1 is a 2-(methacryloyloxy)ethyl phosphate (2-(Methacryloyloxy)ethyl phosphate) monomer and 3-(trimethoxysilyl)propyl methacrylate (3-(Trimethoxysilyl)propyl methacrylate ) monomers are added in a molar ratio of 1:1, and 0.5 parts by weight of normal mercaptan is mixed with 100 parts by weight of the total monomer to make it uniform, and then a small amount of DI is added to 130 parts by weight of ion-exchanged water in a stainless steel high-pressure reactor equipped with a stirrer. Sodium hydrogen phosphate was dissolved and stirred, and the inside of the reactor was filled with an inert gas such as nitrogen and heated, and the reaction was terminated by polymerization at 72 ° C. for 3 hours and 110 ° C. for 2 hours. After the reaction was completed, washing and dehydration , can be prepared by drying.

The compound represented by Formula 1 contains phospho acid at the terminal to improve the coagulation function of the curing composition, and contains a trimethoxysilane group to improve bonding between organic and inorganic materials. In addition, since the weight average molecular weight is 50,000 to 100,000, preferably 70,000 to 80,000, it functions to strengthen the bond between the curing composition and other components. When included in less than 1 part by weight, it is difficult to achieve the desired effect, and when it exceeds 5 parts by weight, the economic disadvantage is greater than the advantage of additional effect improvement, which is not preferable.

The sodium chloride is colorless crystals and contains salts such as magnesium and has deliquescent properties. As a raw material for the production of sodium salt, it plays a role in accelerating the hydration reaction of cement. When it is contained in an amount of less than 1 part by weight, it cannot be smoothly accommodated with moisture, and the heat of hydration is high, which can cause cracks in the sphere of the hardened body. may cause problems.

The aluminum tris (O-ethyl phosphonate) has a property of blocking metal ions and serves as a coagulant. When contained in an amount of less than 0.5 parts by weight, it is difficult to help improve the strength of the cured body, and when it exceeds 1 part by weight, economical efficiency is lacking and it is undesirable for the environment. The potassium chloride (Potassium chloride) is a white crystal belonging to the tetragonal system, and is industrially used as a raw material for the production of potassium salt, and is used as a water reducing agent because of its strong absorbency. When contained in an amount of less than 1 part by weight, it affects the air by slowing the curing speed and curing time of the hardened body. However, it may lead to deterioration of construction quality due to premature hardening of the hardening body.

The calcium chloride may be mixed with cement to promote absorption, and when it is contained in an amount of more than 2.5 parts by weight, a large amount of anhydride is generated, and there may be a problem in that it is difficult to achieve a liquid phase when the curing agent meets moisture.

The magnesium oxide functions as a coagulant. When included in less than 0.2 parts by weight, it is difficult to provide the intended effect, and when it exceeds 2 parts by weight, some MgO is generated in the clinker as periclase (a mineral composed of MgO).

The sodium sulfate is a relatively stable colorless crystal and is used in the manufacture of glass or sodium sulfide. In the hardening body reaction, it is used to dry organic matter in soil. When it is contained in an amount of less than 0.2 parts by weight, it may not sufficiently perform the smooth hydration (pozzolan reaction) of the cement, so there may be a problem in strength. It can increase product cost.

The Na ₂ SiO ₃ is 0.2 to 2 parts by weight alkalization. When included in less than 0.2 parts by weight, it is difficult to obtain the intended effect, and when it exceeds 2 parts by weight, alkalinity increases too much, which may cause a problem.

The lignin sulfonate (Sodium lignosulfonate) serves to absorb and disperse the mixture of soil, industrial waste, river dredging sludge, sea sand, desert sand, cement, etc., and increases strength by combining the cement and the mixture. When contained in an amount of less than 0.2 parts by weight, there may be a problem of inhibiting particle dispersion and lowering the strength after completion of the material. There may be a problem that inhibits the chemical reaction.

As the cement, any cement known in the art may be used without limitation. For example, the most commonly used Portland cement may be used.

Meanwhile, the curing agent of the present invention is preferably used in an amount of 3 to 15 parts by weight based on 100 parts by weight of at least any one of sand and industrial waste used together. When included in less than 3 parts by weight, it is difficult to achieve the intended effect, and when it exceeds 15 parts by weight, it is not economically preferable.

The drying step (S20) of the present invention is a step of molding and drying the stirred mixture by adding a curing agent to at least one of sand and industrial waste.

At this time, the molding is to standardize the stirred mixture for use as a building material or civil engineering material. The block shape is only shown without limitation, and any shape required in the art can be manufactured by molding without limitation.

On the other hand, the molded mixture may be moved to a primary drying furnace and dried naturally or at a low temperature of 200 to 400°C. By drying at a low temperature, a problem of shape deformation does not occur and uniform physical properties can be formed evenly throughout.

In the present invention, the firing step (S30) is a step of firing the dried molded product at a temperature of 850 to 1250° C. In the case of the molded article of the present invention having a composition, it was confirmed that blocks having excellent strength, elasticity and durability were produced when calcined at a temperature of 850 to 1250 °C.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are provided to explain the present invention in more detail, and the scope of the present invention is not limited by the following examples. The following examples can be appropriately modified and changed by those skilled in the art within the scope of the present invention.

Preparation Examples 1 to 3 Preparation of a stirred mixture

4 parts by weight of the compound of Formula 1, 2 parts by weight of sodium chloride, 1 part by weight of aluminum tris(O-ethylphosphonate), 2 parts by weight of potassium chloride, 15 parts by weight of calcium chloride, 1 part by weight of magnesium oxide, 0.8 parts by weight of sodium sulfate, Na ₂ SiO ₃ 1 part by weight, 0.7 parts by weight of lignin sulfonate, and 100 parts by weight of cement were mixed to prepare a curing agent.

[Formula 1]

In the above formula, R1 and R2 are each independently hydrogen or a methyl group, m and n are mole fractions, m is 0.5, n is 0.5, and m + n = 1

The prepared curing agent was added to sand or industrial waste in the ratio shown in Table 1 below and stirred to prepare a stirred mixture.

Preparation Example 1 Preparation 2 Preparation 3 Hardener weight ratio 10 10 10 Sand or industrial waste type/weight ratio Granite/100 Maritime/100 Oni/40 Slag/30
Powder slag/30

Example 1

The stirred mixture of Preparation Example 1 was molded into a rectangular parallelepiped having a width of 30 cm x 10 cm x 10 cm and dried at low temperature at 200 °C for 2 hours. Thereafter, the low-temperature dried molded article was fired at 1000° C. for 8 hours to prepare a block applicable to construction or civil engineering.

Example 2

A block was prepared in the same manner as in Example 1, except that the stirred mixture of Preparation Example 2 was used.

Example 3

A block was prepared in the same manner as in Example 1, except that the stirred mixture of Preparation Example 3 was used.

Example 4

A block was prepared in the same manner as in Example 1, except that the low-temperature dried molded article was calcined at 850° C. for 10 hours.

Example 5

A block was prepared in the same manner as in Example 1, except that the low-temperature dried molded article was calcined at 1250° C. for 7 hours.

Comparative Example 1

After molding the stirred mixture of Preparation Example 1 into a rectangular parallelepiped having a width of 30 cm x 10 cm x 10 cm in height, the low-temperature dried molded article was fired at 1000 ° C. for 8 hours to prepare a block applicable to construction or civil engineering.

Comparative Example 2

The stirred mixture of Preparation Example 1 was molded into a rectangular parallelepiped having a width of 30 cm x 10 cm x 10 cm and dried at low temperature at 200 °C for 2 hours. Thereafter, the low-temperature dried molded article was fired at 800° C. for 12 hours to prepare a block applicable to construction or civil engineering.

Comparative Example 3

The stirred mixture of Preparation Example 1 was molded into a rectangular parallelepiped having a width of 30 cm x 10 cm x 10 cm and dried at low temperature at 200 °C for 2 hours. Thereafter, the low-temperature dried molded article was fired at 1300° C. for 6 hours to prepare a block applicable to construction or civil engineering.

test example

The blocks prepared in Examples 1 to 5 and Comparative Examples 1 to 3 were measured for compressive strength using a testing machine according to KSF 2405. For the load, the increase in compressive stress was 2~3 kgf/cm2 per second. After the block started to deform rapidly, stop adjusting the speed of applying the load and continue to apply the load to measure the uniaxial compressive strength, and then perform the result. Table 2 shows.

division Uniaxial compressive strength (kgf/㎠) Example 1 91.86 Example 2 87.23 Example 3 65.17 Example 4 88.36 Example 5 90.27 Comparative Example 1 65.37 Comparative Example 2 75.07 Comparative Example 3 73.07

As can be seen from the test results in Table 2, the blocks of Examples 1 to 5, which are building/civil blocks using sand or building waste according to the present invention, exhibited very excellent compressive strength, and the degree of deformation of the model during the test didn't happen On the other hand, Comparative Example 1, which was not subjected to the primary drying process, exhibited very low compressive strength, and most of the corners of the block were cracked or deformed during the test. On the other hand, Comparative Example 2, which was calcined at a low temperature of 800 °C, had a long calcination time and showed low compressive strength. In addition, Comparative Example 3, which was fired at a high temperature of 1000 ° C., also exhibited low compressive strength, and there was a problem in that some corners of the block were cracked during the test.

100a, 100b, 100c, 100d: Building and civil engineering blocks

Claims (1)

adding a hardener to the sand and stirring;
molding the stirred mixture and drying at a low temperature at 200°C; and
Including; sintering the dried molded article at a temperature of 850 ~ 1250 ℃,
The curing agent is 4 parts by weight of the compound of Formula 1, 2 parts by weight of sodium chloride, 1 part by weight of aluminum tris(O-ethylphosphonate), 2 parts by weight of potassium chloride, 15 parts by weight of calcium chloride, 1 part by weight of magnesium oxide, 0.8 parts by weight of sodium sulfate part, Na ₂ SiO ₃ 1 part by weight, 0.7 parts by weight of lignin sulfonate, and 100 parts by weight of cement,
In Formula 1 below, 2-(methacryloyloxy)ethyl phosphate monomer and 3-(trimethoxysilyl)propyl methacrylate monomer are added in a molar ratio of 1:1, and 0.5 normal mercaptan is added to 100 parts by weight of the total monomer. It is prepared by mixing parts by weight,
The sand is granite or sea sand, a method of manufacturing a building/civil block using sand:
[Formula 1]

In Formula 1, R1 and R2 are each independently hydrogen or a methyl group, m and n are mole fractions, m is 0.3 to 0.7, n is 0.3 to 0.7, and m + n = 1.

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