KR102549198B1 - High strength cement concrete motar composition using waste or cullet glass and the concrete product using the same and the manufacturing method thereof - Google Patents

Abstract

The present invention relates to a high-strength cement concrete mortar composition using waste glass or cullet, a concrete product using the same, and a method for manufacturing the same, and more particularly, to shorten the steam curing period and to develop 4CaO 3Al ₂ O ₃ SO ₃ 50 to 75 parts by weight of clinker powder, 10 to 20 parts by weight of ordinary Portland cement clinker powder, 5 to 20 parts by weight of blast furnace slag powder, silica fume and nano calcium carbonate in a 1: 1 weight ratio 45 to 60 parts by weight of natural fine aggregate with a particle size of silica sand No. 6 to 8, based on 100 parts by weight of a fast-setting cement binder containing 5 to 15 parts by weight of the mixed crack-reinforcing mixed powder and 5 to 15 parts by weight of petrocoke desulfurized gypsum powder, High-strength cement concrete using waste glass or cullet composed of 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm, waste glass or cullet fine aggregate using 5 to 15% of the natural fine aggregate as an alternative, and water It relates to a mortar composition, a concrete product using the same, and a manufacturing method thereof.

Description

High-strength cement concrete mortar composition using waste glass or cullet, concrete product using the same, and manufacturing method thereof

The present invention relates to a high-strength cement concrete mortar composition using waste glass or cullet, a concrete product using the same, and a method for manufacturing the same, and more particularly, to shorten the steam curing period and to develop 4CaO 3Al ₂ O ₃ SO ₃ 50 to 75 parts by weight of clinker powder, 10 to 20 parts by weight of ordinary Portland cement clinker powder, 5 to 20 parts by weight of blast furnace slag powder, silica fume and nano calcium carbonate in a 1: 1 weight ratio 45 to 60 parts by weight of natural fine aggregate with a particle size of silica sand No. 6 to 8, based on 100 parts by weight of a fast-setting cement binder containing 5 to 15 parts by weight of the mixed crack-reinforcing mixed powder and 5 to 15 parts by weight of petrocoke desulfurized gypsum powder, High-strength cement concrete using waste glass or cullet composed of 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm, waste glass or cullet fine aggregate using 5 to 15% of the natural fine aggregate as an alternative, and water It relates to a mortar composition, a concrete product using the same, and a manufacturing method thereof.

In general, cement concrete is a mixture of cement, aggregate, and water to create various structures. Cement plays a role in adhering and combining aggregates and plays an important role in developing strength.

However, conventional cement concrete has high compressive strength, but low tensile strength and flexural strength, and a long curing period, which is a problem in productivity and economy. Cement is expensive and effective for rapid strength development, but due to higher heat of hydration and drying shrinkage than ordinary Portland cement, internal stress remains inside the structure and microcracks are likely to occur. It directly or indirectly affects the properties and can adversely affect the stability of concrete structures, so there is a limit to its use in civil engineering and buildings that require high strength.

On the other hand, as a concrete secondary product used in civil engineering and buildings, precast manholes (PC manholes) or precast water pipes (PC water pipes) are typically used, and as a representative method of manufacturing the precast manholes (PC manholes), , there are two methods: manufacturing manholes with general high-strength concrete and manufacturing manholes with polymer concrete.

Although the general high-strength concrete manhole is inexpensive, the flexural strength is significantly lower than the compressive strength, so the flexural strength must be expressed using reinforcing bars. For this reason, the cross-sectional thickness increases, the weight increases, and it is difficult to handle, especially when excavating As a result of the wide width, it is difficult to use in downtown areas with many obstacles. In addition, to compensate for this, reinforcing fibers such as steel fibers and organic fibers are mixed, but the dispersion effect is not excellent and the price of the fibers themselves is still high, so they are not commercialized much.

In addition, as another method of manufacturing the precast manhole (PC manhole), a method using polymer concrete is currently widely used. Polymer concrete not only has higher mechanical properties than general cement concrete, such as compression, tensile and flexural strength, but also has excellent properties that can control pot life and hardening time in a wide range. However, polyester resins used as polymer concrete materials are generally expensive. However, it is unreasonable that the price rises according to the international oil price and raw material supply and demand situation, so the economic feasibility is low.

In addition, the precast water pipe (PC water pipe) is buried and installed as an upper open water pipe or an upper closed water pipe for drainage treatment of rainwater rainwater or sewage in a basement or ground of a road, civil engineering, building, etc.

In particular, the precast water pipe (PC water pipe) is developed and used in various structures with various materials (eg, metal material, concrete block, plastic synthetic resin, etc.) depending on the place or size of application, and is also built directly at the work site, In order to improve work productivity and save construction costs, standardized water pipes made of metal, concrete, plastic synthetic resin, etc. are mass-produced in advance at the factory, and then assembled and constructed on site.

Looking at known technologies related to high-degree concrete compositions for manufacturing secondary concrete products including precast manholes (PC manholes) or precast water pipes (PC water pipes) used in civil engineering and buildings, Korea Registered Patent No. 10-0717935 (registration date: May 7, 2007) 90 cement mixture containing 80 to 95 parts by weight of clinker mainly composed of 4CaO·3Al ₂ O ₃ ·SO ₃ and 5 to 20 parts by weight of type II anhydrite to 95 parts by weight, and 5 to 10 parts by weight of silica fume, characterized in that the concrete binder composition and a concrete composition containing a fine aggregate, the concrete composition at 40 ℃ for 2 hours to 4 hours, and at 50 ℃ to 90 ℃ A concrete manufacturing method comprising the step of steam curing for 6 to 22 hours has been developed.

In addition, 20 to 30 parts by weight of silica fume, 30 to 40 parts by weight of crushed quartz, silica sand based on 100 parts by weight of cement 100 to 120 parts by weight, carbon nanotube (CNT) 0.05 to 0.15 parts by weight, nano silica 1.5 to 2.5 parts by weight, CSA expanding material 1 to 10 parts by weight, shrinkage reducing agent 0.1 to 3 parts by weight, fluidizing agent 2 ~ 5 parts by weight, steel fiber 1.5 ~ 2.5% by volume, and water 21 ~ 24 parts by weight, the cement is a white cement calcined at a temperature of 1450 ~ 1550 ℃ and then cooled by cooling water, the carbon nanotubes are 40 A shrinkage-reducing ultra-high-strength concrete composition treated with sonication for a certain period of time under a condition of ~60 Hz is known.

In addition, Korea Patent Publication No. 10-2021-0130575 (published on November 01, 2021) is a composition for ultra-high strength concrete manholes containing a total binder, fine aggregate, and coarse aggregate containing a binder and a mixing water, total binder: Fine aggregate: The weight ratio of coarse aggregate is 32.5-40: 20-30: 30-37.5, and the binder is 80-96% by weight of clinker mainly composed of 4CaO·3Al ₂ O ₃ ·SO ₃ and Type II anhydrous gypsum 4-20 90 to 95% by weight of special cement, and 5 to 10% by weight of silica fume, and 20 parts by weight or less (excluding 0 parts by weight) of mixing water is added with respect to 100 parts by weight of the binder A method of manufacturing a high-strength concrete manhole for an irregular special standard is known.

In addition, Korea Patent Publication No. 10-2022-0077822 (published on June 9, 2022) is a low-viscosity high-strength concrete composition in which 0.5 to 1.5 kg/m 3 of soda lime glass is added to a high-strength concrete composition with a compressive strength of 50 MPa or more at the age of 28 The soda lime glass has a true specific gravity of 0.125 to 0.6 g/ml, an average particle diameter of 16 to 65 μm, a 90% breaking strength of 1.7 to 193.1 MPa, and a slump flow of 525 to 675 mm when silica fume is not added. , T _{50 of} 5.0 seconds or less and a plastic viscosity of 50 pa·s or less, and a low-viscosity high-strength concrete composition characterized by expressing rheological properties is known.

However, in the prior art, ultra-fast-hardening cements such as clinker containing 4CaO·3Al ₂ O ₃ ·SO ₃ as a main component cause micro-shrinkage due to high heat of hydration, which reduces the quality of concrete and penetrates moisture and salt into the concrete structure. This is the main cause of deterioration of the structure.

In particular, most of the cracks that occur during construction lead to not only local cracks but also damage over time due to the nature of fast-setting cement that expresses initial strength, which leads to a decrease in durability of the entire structure, leading to a serious problem that does not fulfill the design life span. there is.

In addition, high-strength concrete reinforced by incorporating fibers into conventional Portland cement solves the problems of low tensile and flexural strength of concrete, but has a high curing temperature, long curing time, and high productivity and It has economic problems.

As described above, structures using high-strength concrete presented in the prior art are expected to suffer from severe durability and mechanical performance degradation when shrinkage cracks occur, and there are still problems in terms of workability and strength to be used in the field.

[Patent Document 001] Korean Registered Patent No. 10-0717935 (registration date: May 07, 2007) [Patent Document 002] Korean Registered Patent No. 10-2148007 (registration date: August 19, 2020) [Patent Document 003] Korea Patent Publication No. 10-2021-0130575 (published on November 01, 2021) [Patent Document 004] Korea Patent Publication No. 10-2022-0077822 (published on June 9, 2022)

The present invention is intended to solve the above conventional problems, shortens the steam curing period, and 50 to 75 parts by weight of clinker powder containing 4CaO·3Al ₂ O ₃ ·SO ₃ as a main component in order to develop initial and long-term strength, usually Portland cement 10 to 20 parts by weight of clinker powder, 5 to 20 parts by weight of blast furnace slag powder, 5 to 15 parts by weight of crack-reinforcing mixed powder in which silica fume and nano calcium carbonate are mixed in a 1: 1 weight ratio, petro coke desulfurized gypsum powder 5 to 15 45 to 60 parts by weight of natural fine aggregate having a particle size of silica sand No. 6 to 8, 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm, 5 to 5 parts by weight of the natural fine aggregate It is a task to solve the problem of providing a high-strength cement concrete mortar composition using waste glass or cullet containing 15% of waste glass or cullet fine aggregate and water, a concrete product using the same, and a manufacturing method thereof. do.

The present invention is to solve the above problems, shortens the steam curing period, and 50 to 75 parts by weight of clinker powder mainly composed of 4CaO 3Al ₂ O ₃ SO ₃ to develop initial and long-term strength, usually Portland cement clinker 10 to 20 parts by weight of powder, 5 to 20 parts by weight of blast furnace slag powder, 5 to 15 parts by weight of crack-reinforcing mixed powder in which silica fume and nano calcium carbonate are mixed in a 1:1 weight ratio, 5 to 15 parts by weight of petro coke desulfurized gypsum powder 45 to 60 parts by weight of natural fine aggregate having a particle size of silica sand No. 6 to 8, 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm, 5 to 15 parts by weight of the natural fine aggregate with respect to 100 parts by weight of the fast-setting cement binder containing A high-strength cement concrete mortar composition using waste glass or cullet composed of waste glass or cullet fine aggregate and water, which uses % as a substitute, is used as a solution to the problem.

The clinker powder mainly composed of 4CaO·3Al ₂ O ₃ ·SO ₃ and ordinary Portland cement clinker powder have a powder degree of 4,500 to 5,800 cm 2 / g in order to accelerate the initial curing speed.

The blast furnace slag powder is a material exhibiting pozzolanic reactivity and is intended to develop long-term strength, improve durability, and reduce heat of hydration, and has a fineness of 6,000 to 8,000 cm 2 / g as a solution to the problem.

The petrocoke desulfurized gypsum powder is subjected to sulfate stimulation by contained sulfate and alkali stimulation by strong alkali to the blast furnace slag powder to obtain a large amount of ettringite and C-S-H gel by activating the hydration reaction of the blast furnace slag powder. As a solution to the problem, the C-S-H gel expresses long-term strength while forming a dense network network structure with ettringite.

The waste glass or cullet fine aggregate is a waste glass that is a waste of glass products including glass bottles, glass containers, glass windows, solar cells, or LCD/OLED substrate glass or pulverized cullet generated in the manufacturing process. as a solution

The high-strength cement concrete mortar composition is a solution to the problem by mixing and using 0.1 to 0.5% by weight of a retardant selected from tartaric acid, gluconic acid, citric acid, and oxycarbonic acid.

The high-strength cement concrete mortar composition contains one hardening accelerator selected from calcium chloride (CaCl ₂ ), sodium carbonate (Na ₂ CO ₃ ), sodium hydroxide (NaOH), and aluminum hydroxide (Al(OH) ₃ ) in an amount of 0.1 to 0.5% of the total composition. Mixed use by weight% is a means of solving the problem.

A concrete product including a high-strength precast concrete manhole, a high-strength precast concrete water tank, or a high-strength precast concrete water pipe manufactured using the high-strength cement concrete mortar composition is a solution to the problem.

A concrete product comprising a high-strength precast concrete manhole, high-strength precast concrete water tank or high-strength precast concrete water pipe comprising the step of steam curing the high-strength cement concrete mortar composition at 45-65 ° C. for 1 hour 30 minutes to 4 hours The manufacturing method is used as a solution to the problem.

The high-strength cement concrete mortar composition using waste glass or cullet, concrete products using the same, and manufacturing method thereof according to the present invention shortens the steam curing period and uses 4CaO·3Al ₂ O ₃ ·SO ₃ to develop initial and long-term strength. 50 to 75 parts by weight of clinker powder as a main component, 10 to 20 parts by weight of ordinary Portland cement clinker powder, 5 to 20 parts by weight of blast furnace slag powder, silica fume and nano calcium carbonate mixed in a 1: 1 weight ratio Crack reinforcing mixed powder 5 ~15 parts by weight, 45 to 60 parts by weight of natural fine aggregate with a particle size of silica sand No. 6 to 8, based on 100 parts by weight of a fast-setting cement binder containing 5 to 15 parts by weight of petrocoke desulfurized gypsum powder, 5 to 15 mm particle size It is composed of 40 to 55 parts by weight of coarse aggregate, waste glass or cullet fine aggregate that substitutes 5 to 15% of the natural fine aggregate, and water, shortens the steam curing period, and has excellent initial and long-term strength. There is an excellent effect of being able to manufacture concrete products including water pipes.

Hereinafter, examples and/or drawings of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments and/or drawings described herein.

First, the high-strength cement concrete mortar composition using waste glass or cullet of the present invention shortens the steam curing period and uses 4CaO·3Al ₂ O ₃ ·SO ₃ as a main component for clinker powder 50 to 75 parts by weight, 10 to 20 parts by weight of ordinary Portland cement clinker powder, 5 to 20 parts by weight of blast furnace slag powder, 5 to 15 parts by weight of crack-reinforcing mixed powder in which silica fume and nano calcium carbonate are mixed in a 1: 1 weight ratio, petrocow 45 to 60 parts by weight of natural fine aggregate having a particle size of silica sand No. 6 to 8, 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm, based on 100 parts by weight of a quick-setting cement binder containing 5 to 15 parts by weight of desulfurized gypsum powder , It is composed of waste glass or cullet fine aggregate using 5 to 15% of the natural fine aggregate as an alternative, and water.

Here, in general, fast-setting cements containing calcium sulfoaluminate are generally characterized in that they react with water during the manufacture of mortar or concrete and harden within a few minutes to several tens of minutes to develop a strength of 20 MPa or more in 3 to 6 hours, It can be mainly used for emergency repair of structures such as roads and bridges.

However, when reacting with water, fast-setting cement produces ettringite (3CaO Al ₂ O ₃ 3CaSO ₄ 32H ₂ O), calcium aluminate hydrate (4CaO Al ₂ O ₃ 10H ₂ O), and gel-like hydroxide. Hydrates such as aluminum (Al(OH) ₃ ) are formed very quickly, and as a result, the fluidity of paste, mortar and concrete is rapidly deteriorated. Since it has a structure of three-dimensional bonding strength of the hardening body, the strength expression is lowered. Therefore, setting control agents are generally used in fast-setting cements to control these quick-hardening properties and fluidity. There are many or expensive chemicals designated as , so there is a problem in terms of use or economy.

Accordingly, in the present invention, in order to minimize the use of the setting regulator and to control the fast hardening, fluidity, etc. of the fast setting cement, the clinker powder containing 4CaO·3Al ₂ O ₃ ·SO ₃ as the main component was used as the clinker powder of ordinary Portland cement. Mixed use is a characteristic technique of qs invention.

That is, the ordinary Portland cement clinker powder is a calcareous raw material (usually limestone) mainly composed of calcium carbonate (CaCO ₃ ) and a silica stone and clay raw material containing a large amount of silicon dioxide (SiO ₂ ), and the main constituent mineral is calcium oxide ( It is a calcium silicate compound produced by combining CaO) and silicon dioxide (SiO ₂ ).

The calcium silicate compound is generally tricalcium silicate (CaSiO ₅ , 3CaO.SiO ₂ ) called alite (C ₃ S) and dicalcium silicate (belite, C ₂ S) called Ca ₂ SiO ₄ ,2CaO.SiO ₂ ).

Depending on the type of the ordinary Portland cement clinker, the amount of these varies, and in the ordinary Portland cement clinker, the usual allite is 45 to 60% and the bellite is 15 to 30%, and the total is about 70 to 80%, which is a kiln. It is a crystal phase in which calcium oxide (CaO), the main component of limestone, and silicon (Si), the main component _of clay or silica, are combined when calcined in ), and the bellite (C ₂ S) has a round shape with a size of 15 to 20 μm.

The minerals constituting the ordinary Portland cement clinker include a compound called an interstitial phase that exists while filling the gaps between these crystals in addition to allite and belite, and constituting the interstitial phase is an aluminate phase ( tricalcium aluminate (Ca ₃ Al ₂ O ₆ ,3CaO.Al ₂ O ₃ , C ₃ A) called aluminate phase) and tetracalcium aluminate (Ca ₄ Al ₂ Fe ₂ O called ferrite phase) ₁₀ , 4CaO.Al ₂ O ₃ . Fe ₂ O ₃ , C ₄ AF).

These are included at around 10% each. The aluminate phase is a combination of calcium oxide (CaO) and aluminum oxide (Al ₂ O ₃ ), and the ferrite phase is a combination of calcium oxide, aluminum oxide and iron oxide (Fe ₂ O ₃ ). . As such, the major minerals constituting clinker can be divided into four types:

If the ordinary Portland cement clinker as described above is pulverized by adding about 5% gypsum, it becomes ordinary Portland cement, but in the present invention, the ordinary _Portland cement clinker powder _is a _clinker mainly composed of As it is mixed and used with powder, it adjusts the quick hardening and fluidity, and at the same time, 4CaO·3Al ₂ O ₃ ·SO ₃ is added to the crystal gap of the structure of ordinary Portland cement clinker. As it is filled, a dense tissue is formed, which has the effect of increasing not only the initial strength but also the long-term strength.

In the present invention, it is preferable to use 50 to 75 parts by weight of clinker powder containing 4CaO·3Al ₂ O ₃ ·SO ₃ as a main component and 10 to 20 parts by weight of ordinary Portland cement clinker powder. There are disadvantageous problems in fast hardening, initial and long-term strength.

In addition, the clinker powder containing 4CaO·3Al ₂ O ₃ ·SO ₃ as a main component and the ordinary Portland cement clinker powder preferably have a powder degree of 4,500 to 5,800 cm 2 / g in order to accelerate the initial curing speed. When is more than 5,800 cm 2 / g, the initial heat of hydration may increase according to the increase in hydration reactivity, and when the fineness is less than 4,500 cm 2 / g, there is a concern that the hydration reactivity is lowered.

On the other hand, the blast furnace slag powder is produced as a by-product when pig iron is manufactured in a blast furnace, and is a powdered product of slow-cooled slag that cools high-temperature molten slag in the air and granulated slag that is rapidly cooled with pressure water, as an admixture for concrete mortar. The scope of application and quality standards for ground granulated blast-furnace slag for use in concrete are set in KS F 2563.

The average chemical composition of the blast furnace slag powder is about SiO ₂ = 33%, Al ₂ O ₃ = 14%, CaO = 42%, MgO = 6%, TiO ₂ = 1%, Fe ₂ O ₃ = 0.5%, Compared to ordinary Portland cement, it contains less CaO and contains about 10% more SiO ₂ and Al ₂ O ₃ respectively.

In particular, the blast furnace slag powder reacts with unstable calcium hydroxide generated in the cement hydration reaction, forms a stable hydrate, makes the hardened body structure dense, and moreover, has the ability to fix chloride ions or alkali ions compared to cement (active control of the cause of deterioration). high portential. Therefore, when blast furnace slag powder is used as a concrete admixture, it is possible to manufacture sustainable concrete, such as improving durability such as watertightness, chemical resistance, seawater resistance, salt shielding property, alkali silica reaction control, etc.

In addition, the blast furnace slag powder has latent hydraulic properties and is a material exhibiting pozzolanic reactivity, and can be used to develop long-term strength, improve durability, and reduce heat of hydration. Preferably, when the fineness is lower than 6,000 cm 2 / g, the pozzolan reactivity may be low, and when the powder fineness is 8,000 cm 2 / g or more, the pozzolan reactivity is high, but the cost is high, and economical efficiency may be reduced.

In addition, in the present invention, when the blast furnace slag powder is less than 5 parts by weight, long-term strength may be weak, and when it exceeds 20 parts by weight, initial strength may be delayed.

In addition, in the present invention, a crack-reinforcing mixed powder in which silica fume and nano-calcium carbonate are mixed in a weight ratio of 1:1 is used.

The silica fume and nanocalcium carbonate are reinforcing agents for imparting crack resistance to the composition of the present invention, and the silica fume is an amorphous activated silica having an average particle diameter of about 0.15 μm and a particle close to a perfectly spherical shape. The silica fume serves to improve waterproofness and chemical resistance and improve crack resistance by a filling effect between super-fast-hardening cement-based binder particles due to the characteristics of spherical particles.

In addition, the nano-calcium carbonate improves the crack resistance by making the texture and surface of the composition of the present invention dense. In particular, the nano-calcium carbonate may be pulverized nano-calcium carbonate or precipitated nano-calcium carbonate, and the nano-calcium carbonate preferably has an average particle size of 100 to 10,000 nm. If it is less than 100 nm, mixing with other components is poor, and mixing is not well stirred, resulting in problems in the manufacturing process.

The silica fume and nanocalcium carbonate are preferably mixed in a 1:1 weight ratio in the composition of the present invention and used in an amount of 5 to 15 parts by weight, and when out of the above range, the cost increases due to a decrease in physical properties or the use of unnecessary materials.

In addition, the petrocoke desulfurized gypsum powder reacts with the sulfur component contained in the petrocoke and the CaO component obtained by decarbonizing the limestone at high temperature in the process of co-firing limestone for in-furnace desulfurization in a boiler using petrocoke as a raw material. It is a particulate, gypsum-like substance produced by

The petrocoke desulfurization gypsum powder has high purity due to the nature of the raw material, and thus exhibits superior performance compared to natural gypsum, flue gas desulfurization gypsum, and in-furnace desulfurization method high calcium coal combustion material containing a large amount of impurities used as conventional construction materials.

In addition, the petrocoke desulfurized gypsum powder is a strong alkali material having a pH of 11.5 or higher, and when sulfate and high pH contained in the gypsum apply sulfate stimulation and pH-dependent alkali stimulation to the blast furnace slag powder, the blast furnace slag powder is activated It initiates a latent hydraulic reaction and expresses solid strength.

That is, the hydration reaction between the blast furnace slag powder and the sulfate stimulant of the petrocoke desulfurized gypsum powder starts with a large amount of ettringite as a skeleton at an early age and is achieved by the C-S-H gel produced at the same time.

In addition, the C-S-H gel surrounds the ettringite, the amount of production continuously increases as the age passes, and the C-S-H gel tightly fills the pores of the cured paste, forming a dense network network structure with the ettringite while continuously increasing the demonstrate strength.

In the present invention, it is formulated to contain 5 to 15 parts by weight of petrocoke desulfurized gypsum powder, and is used to exhibit rapid hardening and long-term strength.

On the other hand, waste glass or cullet fine aggregate, which is used as a substitute for the natural fine aggregate, is generally regarded as a defective product and discarded if dissolution defects, appearance defects, and dimensional defects occur during the manufacturing and processing process of substrate glass. In this process, A large amount of waste glass and cullet is generated.

In general, cullet is defects (scratches) that occur during glass raw material manufacturing and scrap glass (surface coated and unprocessed) remaining after processing glass original plates, and waste glass is electrode, blackening coating, film compression, etc. in the display panel process. It refers to scrap glass whose surface is contaminated due to processing of

In particular, in order to ensure the continuous quality of substrate glass as a display component, if a defect occurs, it is not recycled again in the LCD/OLED substrate glass manufacturing process, and these waste glasses are discarded as they are by landfill, and the amount amounts to a considerable amount. .

Therefore, interest in the recycling of such LCD / OLED waste glass and cullet is increasing, and in order to reduce the generation of waste, it is necessary to continuously develop and expand the recycling method and recycling use.

In the present invention, it is preferable to use the waste glass or cullet fine aggregate in an amount of 5 to 15% by weight of the natural fine aggregate.

In addition, in the present invention, 40 to 55 parts by weight of coarse aggregate having a particle size of 5 to 15 mm is used, but the recycling rate can be increased by using natural aggregate, electric furnace oxidized slag, ferronickel slag, copper slag aggregate, and the like.

In addition, in the high-strength cement concrete mortar composition of the present invention, it is preferable to mix and use 0.1 to 0.5% by weight of a retardant selected from tartaric acid, gluconic acid, citric acid, and oxycarboxylic acid in the total composition.

That is, the retardant improves workability by delaying the hardening of the high-strength cement concrete mortar composition of the present invention, and may be included in an amount of 0.1 to 0.5% by weight. This may decrease, and when it exceeds 0.5% by weight, a lot of time may be required for curing.

In addition, the high-strength cement concrete mortar composition of the present invention includes one type of hardening accelerator selected from calcium chloride (CaCl ₂ ), sodium carbonate (Na ₂ CO ₃ ), sodium hydroxide (NaOH), and aluminum hydroxide (Al(OH) ₃ ) as a whole composition. It can be mixed and used in an amount of 0.1 to 0.5% by weight.

The hardening accelerator is used to accelerate hardening of the high-strength cement concrete mortar composition of the present invention, may be included in an amount of 0.1 to 0.5% by weight, and may be used together with a retardant to adjust the working time.

In addition, the present invention is characterized by a concrete product including a high-strength precast concrete manhole or high-strength precast concrete water pipe manufactured using the high-strength cement concrete mortar composition.

At this time, the concrete product may be prepared by a manufacturing method comprising steam curing the high-strength cement concrete mortar composition at 45-65 ° C. for 1 hour 30 minutes to 4 hours.

50kg of clinker powder with 4CaO·3Al ₂ O ₃ ·SO ₃ as the main component, 20kg of ordinary Portland cement clinker powder, 10kg of blast furnace slag powder, 10kg of crack-reinforcing mixed powder mixed with silica fume and nanocalcium carbonate in a 1:1 weight ratio, Petro 33.5 kg of natural fine aggregate with a particle size of silica sand No. 6 to 8, 33.5 kg of coarse aggregate with a particle size of 5 to 15 mm, 13 kg of waste glass or cullet fine aggregate and water for 100 kg of fast-setting cement binder containing 10 kg of coke desulfurized gypsum powder After preparing the high-strength cement concrete mortar composition of the present invention by mixing, concrete specimens were prepared by steam curing at 60 ° C. for 3 hours, and the compressive strength and strength were tested, and the results are shown in the following [Table 1].

Hammok reference value Example 1 Test Methods Compressive strength (MPa) over 40 55.3 KS F 2405 Flexural strength (MPa) over 10 11.2 KS F 2408

As shown in the test results of [Table 1], it can be seen that the high-strength cement concrete mortar composition of the present invention far exceeds all of the standard values in all physical properties.

The above description is only illustrative of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments and / or drawings disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and / or drawings. . The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (9)

To shorten the steam curing period and to develop initial and long-term strength, 50 to 75 parts by weight of clinker powder mainly composed of 4CaO 3Al ₂ O ₃ SO ₃ , 10 to 20 parts by weight of ordinary Portland cement clinker powder, blast furnace slag powder 5 ~20 parts by weight, 100 parts by weight of a fast-setting cement binder containing 5 to 15 parts by weight of a crack-reinforcing mixed powder in which silica fume and nanocalcium carbonate are mixed in a 1: 1 weight ratio, and 5 to 15 parts by weight of Petrocoke desulfurized gypsum powder 45 to 60 parts by weight of natural fine aggregate with a grain size of silica sand No. 6 to 8, 40 to 55 parts by weight of coarse aggregate with a particle size of 5 to 15 mm, waste glass or cullet fine aggregate that substitutes 5 to 15% of the natural fine aggregate And a high-strength cement concrete mortar composition using waste glass or cullet containing water,
The petrocoke desulfurized gypsum powder is a strong alkali having a pH of 11.5 or more, and sulfate stimulation by the sulfate contained therein and alkali stimulation by the strong alkali are applied to the blast furnace slag powder to obtain a large amount of ether by activating the hydration reaction of the blast furnace slag powder. It produces ettringite and CSH gel, and the CSH gel expresses long-term strength while forming a dense network network structure with ettringite,
The waste glass or cullet fine aggregate is characterized by crushing waste glass or cullet generated in the manufacturing process, which is a waste of glass products including glass bottles, glass containers, glass windows, solar cells, or LCD / OLED substrate glass. High-strength cement concrete mortar composition using waste glass or cullet
According to claim 1,
The clinker powder mainly composed of 4CaO 3Al ₂ O ₃ SO ₃ and ordinary Portland cement clinker powder have a fineness of 4,500 to 5,800 cm 2 / g in order to accelerate the initial curing speed, characterized in that waste glass or cullet High-strength cement concrete mortar composition using
According to claim 1,
The blast furnace slag powder is a material exhibiting pozzolanic reactivity and is intended to develop long-term strength, improve durability, and reduce heat of hydration, and has a fineness of 6,000 to 8,000 cm 2 / g. High-strength cement concrete mortar composition using waste glass or cullet, characterized in that
delete delete According to claim 1,
The high-strength cement concrete mortar composition is high-strength cement concrete using waste glass or cullet, characterized in that a retardant selected from tartaric acid, gluconic acid, citric acid, and oxycarbonic acid is used in an amount of 0.1 to 0.5% by weight of the total composition. mortar composition
According to claim 1,
The high-strength cement concrete mortar composition contains one hardening accelerator selected from calcium chloride (CaCl ₂ ), sodium carbonate (Na ₂ CO ₃ ), sodium hydroxide (NaOH), and aluminum hydroxide (Al(OH) ₃ ) in an amount of 0.1 to 0.5% of the total composition. High-strength cement concrete mortar composition using waste glass or cullet, characterized in that it is mixed in weight%
A high-strength precast concrete manhole, a high-strength precast concrete water tank or a high-strength precast concrete water pipe manufactured using the high-strength cement concrete mortar composition according to any one of claims 1 to 3 and 6 to 7 Concrete products containing
A high-strength precast comprising steam curing the high-strength cement concrete mortar composition according to any one of claims 1 to 3 and 6 to 7 at 45-65 ° C for 1 hour 30 minutes to 4 hours Method for manufacturing concrete products including concrete manholes, high-strength precast concrete water tanks or high-strength precast concrete water pipes