KR100459608B1 - A Composition Of Cement compound material And Manufacturing Method thereof - Google Patents

Abstract

The present invention relates to a cement admixture composition, wherein fly ash, blast furnace slug, anhydrous gypsum, gannet and quicklime are separately ground and stored in separate weighing hoppers corresponding to each composition, and have fly ash, blast furnace slug The hydrofluoric acid gypsum, garnet and quicklime are quantified in each measuring hopper and put into the stirrer according to each ratio to achieve a uniform mixing ratio, and is characterized in that the grinding process, the measuring process and the mixing process are separated.

Description

A composition of cement compound material and manufacturing method

The present invention relates to a cement admixture composition that can be used to improve strength and other properties, such as cement concrete, and more particularly, after each composition is individually ground and stored in each silo, which is a storage container, to have a certain powder degree. In addition, the present invention relates to a cement admixture composition which may be added to each metering hopper, weighed by weight%, and finally stirred and mixed in a stirrer to complete a composition having a uniform mixing ratio.

In general, cement admixtures are used for various purposes such as blast furnace cement raw materials, ready-mixed concrete admixtures and special cements, depending on the powder level of slag from the blast furnace. Anhydrous gypsum, which is used as a stimulant for expansion and slag cement, and fly ash added to concrete to improve water tightness and durability against fatigue and abrasion of concrete, and water and water to secure workability when placing concrete. Anhydrous gypsum is widely used for adsorbing a large amount of excess moisture after pouring cement to lower the water and cement ratio during the hydration of cement, and to increase the strength by fully filling the fine pores of concrete while expanding.

Hereinafter, with reference to the accompanying drawings with respect to the grinding process of the conventional cement admixture composition will be described.

Figure 1 is a simplified diagram showing the grinding process of the conventional cement admixture composition and manufacturing method.

As shown in Figure 1, the conventional cement admixture composition is to store each of the rough raw materials in the first silo (1a) and the second silo (1b) as storage containers, and then put them back into the stirrer to the crusher The grinding step and the stirring step are completed simultaneously by the rotation of the inherent grinding screw 3a of (3).

The composition pulverized in the pulverizer 3 is stored in the storage tank 5, and is packaged to a certain weight at the time of shipment and completed.

Such a composition does not have a constant powderiness at the time of grinding due to the difference in hardness and specific gravity of each raw material, and also has a problem that these particles are not well mixed due to the different powder. Therefore, this is a situation that causes the non-uniform manufacturing and deterioration of the cement admixture composition in the manufacturing process.

As high-strength buildings such as high-rise buildings or nuclear power plants are required, silica fume, metakaolin, and CSA clinker are used as concrete admixtures to manufacture concrete. Since these admixtures are very expensive, there is a problem that increases the construction cost of the concrete structure.

As described above, in order to reduce the construction cost according to the use of the admixtures, pozzolan materials such as fly ash, slag powder, and waste zeolite, which are industrial wastes, are used as the admixtures of concrete.

However, the admixtures currently used on the market have a low particle size, resulting in a very low initial strength due to a very slow pozzolanic reaction, thereby increasing the amount of cement substitution of the admixtures, which impedes air shortening at the construction site.

Accordingly, the present invention has been made in view of the above-described conventional problems, the first object of the present invention is to weigh each individually pulverized composition by weight ratio by a quantified mixing ratio and then put into a stirrer It is to provide a cement admixture manufacturing method which is separated from the grinding process, the metering process and the mixing process to achieve a uniform mixing ratio.

And a second object of the present invention is to provide a cement admixture composition having a metering hopper so that the composition which is crushed separately and each powder degree is weighed at each predetermined weight percent and individually put into the stirrer.

The objects of the present invention are 40% to 80% by weight of fly ash;

Blast furnace slugs ranging from 1% to 40%;

1% to 40% by weight of hydrofluoric anhydride

1% to 20% garnet by weight; And

It is achieved by the cement admixture composition characterized by mixing 1% by weight to 5% by weight of quicklime;

In addition, the hydrofluoric anhydride gypsum preferably further comprises calcined lime that occupies 1% by weight to 5% by weight of the total weight of hydrofluoric anhydride to have a uniform particle size.

In addition, the quicklime is preferably 75% by weight of calcium oxide in the total weight of quicklime.

On the other hand, the above objects according to the present invention, fly ash, blast furnace slug, fluoric anhydride gypsum, garnet and quicklime are 2,500 ~ 4,000 cm 2 / g, 3,500 ~ 6,000 cm 2 / g, 3,500 ~ 6,000 cm 2 / g, Separately stirring and powdering to have a particle size of 8,000 to 12,000 cm 2 / g and 2,500 to 5,000 cm 2 / g (S100);

40% by weight to 80% by weight, 1% by weight to 40% by weight, 1% by weight to 40% by weight, 1% by weight of the fly ash, blast furnace slug, fluoride anhydride gypsum, garnet and quicklime, respectively, Separately weighing to have a weight ratio of 20% by weight and 1% by weight to 5% by weight (S200); And

Preparing a cement admixture composition by stirring and mixing the fly ash, blast furnace slug, fluoric anhydride gypsum, garnet and quicklime, respectively, at a predetermined weight ratio (S300). Achieved by the method.

And, in order to make the stirring of the hydrofluoric anhydride gypsum easier, it is preferable that the slaked lime, which occupies 1% by weight to 5% by weight of the total weight of the anhydrous gypsum, is further added during the stirring of the anhydrous gypsum.

In addition, the quicklime is preferably 75% by weight of calcium oxide in the total weight of quicklime.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a simplified view showing the grinding process of the conventional cement admixture composition and manufacturing method,

2 is a step-by-step process flowchart of the cement admixture composition and the manufacturing method according to the present invention,

Figure 3 is a simplified diagram of a cement admixture manufacturing apparatus according to the present invention.

<Description of main parts of drawing>

1a: the first silo 1b: the second silo

3: grinder 3a: grinding screw

5: storage tank 11: first mill

12: second grinder 13: third grinder

14: fourth grinder 15: fifth grinder

21: silo the first 22: silo the second

23: third silo 24: fourth silo

25: silo 5 31: first weighing hopper

32: second weighing hopper 33: third weighing hopper

34: fourth weighing hopper 35: fifth weighing hopper

40: stirrer 41: stirring screw

50: storage tank

Next, the cement mixture composition and the manufacturing method according to the present invention will be described in detail with the accompanying drawings.

2 is a step-by-step process flowchart of the cement admixture composition and the manufacturing method according to the present invention.

As shown in Figure 2, the manufacturing method is for producing a mixed material used when the performance of the cement is required, in general, the mixed material is to be inserted in the non-beam volume of the concrete to replace a part of the concrete This means that the amount used is large enough to be taken into account in the volume calculation, not the simple additive.

This manufacturing method consists of crushing each component, temporarily stored in a silo (silo) storage, and temporarily weighed at a predetermined weight ratio, and finally stirring and mixing.

At this time, the cement admixture composition, which is completed, is mostly made of inorganic materials such as fly ash, slug, anhydrous gypsum, garnet, and quicklime.

Here, the slug is blast furnace slug collected from a blast furnace or the like, and functions as a kind of pozzolanic material together with the fly ash.

And, the quicklime is preferably about 75% by weight of the calcium oxide in the whole quicklime.

When explaining the step of producing a cement admixture composition according to the present invention as follows.

First, fly ash, blast furnace slug, garnet, fluoric anhydride gypsum and quicklime were about 2,500 to 4,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 8,000 to 12,000 cm 2 / g and 2,500 respectively. The fly ash is pulverized to have a particle size of ˜5,000 cm 2 / g. Among the components, the fly ash is a main material of the present invention, which reacts with calcium hydroxide produced during hydration of cement to generate strength, and to generate particle size from a thermal power plant. Since the range is 2500 to 4000 cm 2 / g, there is no need to adjust the particle size separately, the blast furnace slug produces half of the cement and contributes to the strength increase, and at least 40 wt. The particle size ranges from 3500 to 6000 cm 2 / g, which is the most economical, while the strength expression performance is lowered at 3500 cm 2 / g or less, and good performance is obtained at 6000 or more, but the unit quantity is increased and the economy is inferior. Is the main material that causes early strength expression of the present invention, when mixed with more than 40% by weight causes a decrease in strength due to expansion of the internal tissue. In the particle size range, 3500 to 6000 cm 2 / g is the most economical, early strength expression performance is lowered at 3500 cm 2 / g or less, good performance at 6000 cm 2 / g or more, but the economical efficiency is poor. When mixed with more than 20% by weight, the unit quantity weight and strength decrease, so should be used in less than 20% by weight, the particle size range is a by-product, the particle size generated is about 8000 ~ 12000㎠ / g, separate particle size Management is less economical. For reference, the garnet is a by-product of the glass polishing process, and contains 50% or more of silica and alumina, which are the main constituents that cause pozzolanic reactivity, Reduces the internal voids by reducing the work voids of unconcrete concrete and further densifying the internal structure of hardened concrete. It has the effect of having a picture enhancement effect, which corresponds to a function and effect well known in the art. When the quicklime is mixed by more than 5% by weight, it causes a decrease in strength due to initial expansion, and the particle size range is commercialized quicklime If the general particle size of the range of 2500 to 5000 cm 2 / g, it can be used.

In addition, the grinding process is performed in a separate mill so that each component is not mixed with each other. At this time, the hydrofluoric anhydride is agglomerated phenomenon between the particles during the grinding, the particle size is not uniform after grinding, in consideration of the uniformity of the particle size, adding hydrated lime (Ca (OH) ₂ ) At this time, the added slaked lime has about 1% by weight to 5% by weight of the total weight of the hydrofluoric anhydride gypsum (S100).

Next, each component is put into a weighing hopper to be weighed so as to have a constant weight ratio.

In the hopper, the garnet has a weight ratio of about 1% by weight to 20% by weight, and the quicklime is measured to have a weight ratio of about 1% by weight to 5% by weight. At this time, the ratio of the measured fly ash is about 40% by weight to 80% by weight, blast furnace slug is about 1% by weight to 40% by weight, and hydrofluoric anhydride is 1% by weight to 40% by weight. (S200)

Next, the fly ash, the blast furnace slug, the garnet, the hydrofluoric anhydride gypsum and quicklime, which are each weighed at a predetermined ratio, are stirred and mixed to finally form a cement admixture composition.

The composition of the cement admixture according to the present invention thus completed is once stored in the storage tank 50 and then packaged by a predetermined amount and shipped.

Figure 3 is a simplified diagram of a cement admixture manufacturing apparatus according to the present invention.

As shown in FIG. 3, in the preparation of the composition individual grinders 11, 12, 13, 14, 15 and silos 21, 22, 23, 24, 25 for separately grinding and storing the respective components. ), And after storing in each silo (21, 22, 23, 24, 25) is provided with a weighing hopper (31, 32, 33, 34, 35) for weighing each component individually.

Finally, the metered components are put into agitator 40 and stirred and mixed.

In general, the cement admixture composition exhibits its properties in concrete structures by simultaneously compacting and curing at the time of placing concrete structures.

In the present invention, the grinding step, the metering step and the mixing step are separated to have a constant mixing ratio and powder degree.

First, the components are ground to have a certain particle size, and at this time, grinding means corresponding to the components are provided.

That is, fly ash, blast furnace slug, hydrofluoric anhydride, garnet, and quicklime are the first mill 11, the second mill 12, the third mill 13, the fourth mill 14 and the fifth mill 15, respectively. Are ground separately.

Fly ash, blast furnace slug, fluoric anhydride gypsum, garnet, quicklime are about 2,500 to 4,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 8,000 to 12,000 cm 2 / g. And it grind | pulverizes to have a particle size of about 2,500-5,000 cm <2> / g.

At this time, the third crusher 13 for pulverizing the hydrofluoric anhydride is further added to prevent the coagulation of the hydrofluoric anhydride gypsum to be pulverized to a uniform particle size, the addition ratio is the entire About 1% to 5% by weight.

The calcined lime has a function of neutralizing the acidity of the hydrofluoric anhydride with the strong alkalinity of the white powder.

In addition, hydrated lime also serves to remove the electric repulsive force between the particles that existed previously to block the movement of electrons transferred to the surface of the hydrofluoric anhydride gypsum particles in the liquid state.

Thus, due to the calcination circuit added with the hydrofluoric acid-free gypsum to the third mill 13, it serves as an accelerator acting to have a uniform particle size during the grinding process while neutralizing the strong acid of the hydrofluoric acid-free gypsum particles.

In addition, the quicklime is blended so that calcium oxide accounts for 75% of the total weight of all the components, and is added to the fifth mill 15 to be pulverized to have a particle size of about 2500 to 5,000 cm 2 / g.

Each fly ash, blast furnace slug, anhydrous gypsum, garnet, and quicklime, which have been pulverized as described above, undergoes a series of grinding processes, and the first sills 21 corresponding to the respective grinders 11, 12, 13, 14, and 15 are subjected to a series of grinding processes. ) Is temporarily stored in the second silo 22, the third silo 23, the fourth silo 24 and the fifth silo 25.

Each of the compositions stored as described above may be divided into respective constant mixing ratios, respectively, in each of the silos 21, 22, 23, 24, and 25. The third metering hopper 33, the fourth metering hopper 34 and the fifth metering hopper 35 are fed.

Fly ash, blast furnace slug, garnet, hydrofluoric anhydride gypsum and quicklime that are introduced into each of the weighing hoppers 31, 32, 33, 34, and 35 are about 40 wt% to 80 wt% based on the total weight of the cement mixture composition, About 1% to 40% by weight, about 1% to 20% by weight, about 1% to 40% by weight and about 1% to 5% by weight is measured.

Next, all the compositions are added to the stirrer 40 so that mixing with a uniform powder degree is achieved according to the weight percentages measured in the respective measuring hoppers 31, 32, 33, 34, and 35.

At this time, the pair of stirring screws 41 inherent in the stirrer 40 is rotated forward / reverse so that each of the composition is uniformly blended and mixed.

Thus, the cement admixture composition is formed through a series of processes are stored in the storage tank 50 is packaged to a certain weight at the time of shipment is completed.

Hereinafter, the chemistry and role of the cement admixture adjustment according to the present invention will be briefly described.

The hydrofluoric anhydride gypsum absorbs a large amount of excess moisture of the cement to lower the water and cement ratio during the hydration of the cement, and serves to increase the strength by fully filling the fine pores of the concrete while expanding.

The fly ash enhances the durability and watertightness when the cement is replaced with fly ash (fly ash) by enhancing both physical properties of the hardened concrete and the hardened concrete, compared to the case of using the normal cement due to the pozzolanic reaction of the fine particles. Play a role.

The blast furnace chain slug is powdered chain slag from the blast furnace to improve the acid resistance and seawater resistance when placed in concrete and is mainly used as blast furnace cement raw materials, solid fire raw materials and reinforcing raw materials.

The quicklime reacts with water and serves to increase the strength by heating the concrete when it comes into contact with water during pouring.

As described above, the cement admixture composition according to the present invention is provided for the purpose of promoting hardening and strengthening strength of the cozolan concrete in Portland cement.

Fly ash constituting the cement admixture composition according to the present invention as described above, blast furnace chain slug, fluoric anhydride gypsum, garnet and quicklime, sodium heptogluconate, triethanolamine, sodium chloride, silica fume, metakaolin, CSA-based clinker And a certain ratio or a certain amount of the waste zeolite may be included in the present invention.

As described above, the cement admixture composition and the manufacturing method according to the present invention are characterized in that a uniform powder and mixing can be made by separating the grinding process, the metering process, and the mixing process, respectively.

In addition, by recycling industrial waste waste zeolite, slug powder, fly ash, and the like to prevent soil contamination, it has a great effect in terms of environmental protection.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (6)

40% to 80% fly ash; Blast furnace slugs ranging from 1% to 40%; 1% to 40% by weight of hydrofluoric anhydride 1% to 20% garnet by weight; And 1% by weight to 5% by weight of quicklime; cement admixture composition characterized in that the mixture is made in the form of a powder. The method of claim 1, The hydrofluoric anhydride is cement admixture composition, characterized in that it further comprises calcined lime occupying 1% by weight to 5% by weight of the total weight of the hydrofluoric anhydride to have a uniform particle size. The method of claim 1, The quicklime is a cement admixture composition, characterized in that the proportion of calcium oxide in the total weight of quicklime is 75% by weight. Fly ash, blast furnace slug, fluoric anhydride gypsum, garnet and quicklime are respectively 2,500 to 4,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 3,500 to 6,000 cm 2 / g, 8,000 to 12,000 cm 2 / g and 2,500 to 5,000 cm 2 separately grinding to powder to have a particle size of / g (S100); 40% by weight to 80% by weight, 1% by weight to 40% by weight, 1% by weight to 40% by weight, and 1% by weight of the above fly ash, blast furnace slug, fluoride anhydride gypsum, garnet and quicklime Separately weighing to have a weight ratio of 20% by weight and 1% by weight to 5% by weight (S200); And A cement admixture composition, comprising: a step of preparing a cement admixture composition by stirring and mixing fly ash, blast furnace slug, anhydrous gypsum, garnet and quicklime, respectively, measured at a predetermined weight ratio (S300). Manufacturing method. The method of claim 4, wherein Method for producing a cement admixture composition, characterized in that the hydrated lime occupies 1% by weight to 5% by weight of the total weight of the anhydrous gypsum hydrofluoric acid is further added during the pulverization of the hydrofluoric acid-free gypsum. The method of claim 4, wherein The quicklime is a cement admixture composition, characterized in that the proportion of calcium oxide in the total weight of quicklime is 75% by weight.