KR20130142470A - Solidifiying composion using circulation resource and the construction method thereof - Google Patents

Abstract

The objective of the present invention is to provide a non-cement based solidifying composition using circulation resources which includes cement, blast furnace slag cement, and calcium sulfoaluminate based special cement and obtains strength and liquidity same or higher than cement based solidifications without using cementitious by using circulation resources (industrial by-products) generated in industrial fields, and to provide a construction method using the same. Specially, the objective of the present invention is to provide the solidifying composition using the circulation resources which mix designs the composition ratio of the non-cement based solidifying composition according to soil characters in orer to be appropriately mixed and used in target soil such as succulent organic substance soil·sandy soil·soil cement and silty clay and to provide a construction method using the same. In order to acheive the purposes, the solidifying composition using the circulation resources comprises: 65-85wt% of pozzolan synthetic substnace, 5-45wt% of strength promoting activator, and 0.1-5wt% of dispersing agent.

Description

TECHNICAL FIELD [0001] The present invention relates to a fire-fighting composition using circulating resources and a construction method using the same. [0002]

The present invention relates to a fire-fighting composition using circulating resources and a method of applying the same, and more particularly, to a fire-fighting composition using cyclic resources, which is a by-product, And fluidity of the high-fire organic matter, thereby enabling the fire-fighting composition to be used in accordance with the applied soil such as high-function organic soil, sand soil, marathon soil and silt-resistant clay soil.

In general, firefighting is widely used in soft ground reinforcement applications by mixing with cement and quicklime. Particularly, in the case of many earth improvement works such as civil engineering works, stable processing methods such as high fire are widely used to stabilize the ground in order to withstand the load as the structure becomes larger. In particular, the construction performance has been on an increasing trend because it has many advantages in terms of workability and economy in recent years, such as marine and deep-sea mixed treatment methods.

Patent Document 1 discloses a cement admixture comprising 60 to 65% by weight of Portland cement, 10 to 15% by weight of a pozzolanic substance, which is one of blast furnace slag fine powder, coal fly ash, volcanic ash, rice hull ash, diatomaceous earth, silica fume and zeolite, 10 to 15% by weight of a sudsing agent, which is one of gypsum or CSA and alumina cement, and 10 to 15% by weight of a dispersant, which is one of melamine, naphthalene and carboxyl dispersants, A functional powder for improving the soft ground has been disclosed

However, such a conventional fire retardant composition has the following problems. In order to be used in soft ground, a certain fluidity and strength are required. In order to meet such a demand, ordinary cement, blast furnace slag cement and the like should be contained.

In addition, the conventional cement system is produced by calcining natural limestone. However, there is a problem that a large amount of CO ₂ is discharged in the manufacturing process and a part of hexavalent chromium is harmful to the environment on the components.

Korean Patent No. 10-0876222 (Dec. 19, 2008)

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a cement mortar composition which is capable of securing strength and fluidity equal to or higher than that of cement mortar using cyclic resources (industrial byproducts) because there is no need, as well as be able to significantly reduce CO ₂ emissions, to provide eco-friendly and fire 6. the composition and construction methods by using a circular chrome resources have almost no purpose.

In particular, the present invention relates to a cementitious fire-retardant composition comprising a cementitious fire-retardant composition according to the composition of the earth, such as high-function organic soil, sand, silt and silty clays, And a method for constructing the same.

In order to accomplish the above object, the present invention provides a fire-retardant composition using cyclic resources, comprising: 65.0 to 85.0% by weight of a pozzolanic compound; 5.0-45.0% by weight strength activator; And 0.1 to 5.0% by weight of a dispersing agent.

According to the fire-fighting composition using the circulating resource of the present invention and the construction method using the same, the following effects can be obtained.

1) It is possible to obtain fluidity and manifestation effect equal to or higher than that of cement or blast furnace slag cement without containing cement.

2) It can be mixed and designed according to the kind of soil to be applied (for example, high-functional organic soil, sandy soil, marble, silty clays, etc.).

Hereinafter, preferred embodiments of the present invention will be described in more detail. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the constitutions shown in the embodiments described herein are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents which can be substituted at the time of application It should be understood that variations can be made.

< Fire  Composition>

The fire retardant composition using the circulating material according to the present invention comprises 65.0 to 85.0% by weight of a pozzolanic synthetic material; 5.0-45.0% by weight strength activator; And 0.1 to 5.0% by weight of a dispersing agent.

Particularly, the pozzolanic synthetic material is made of a circulating material obtained as an industrial by-product. Such pozzolanic synthetic materials include 45 to 65% by weight of fine blast furnace slag powder; 10 to 45 wt% of fly ash; 10 to 45% by weight of soft material; And 0 to 30% by weight of zeolite-based catalytic catalytic cracking circulation catalyst.

At this time, the blast furnace slag is pulverized by a crushing means such as a ball mill or a vibrating mill. When the content is less than 45 wt%, the strength is weakened. When the content is more than 65 wt%, the coagulation time is long, Liquidity is low.

In addition, fly ash uses what is produced from coal-fired power plants and contributes to the strength by mixing with ball bearings and by pozzolanic reactions with clay. If the content of the fly ash is less than 10% by weight, the flowability of the fly ash is lowered. On the contrary, if the content exceeds 45% by weight, the strength of the fly ash is lowered.

And, the soft material is produced from boilers using a circulating fluidized bed combustion boiler that uses bituminous coal and anthracite as fuel, and is mainly used for lowering the water content in a high water content soil. If the content of such a soft material is less than 10% by weight, the lowering of the water content is low. On the contrary, if the content exceeds 45% by weight, the strength becomes low.

Finally, the zeolite-based flow catalytic cracking catalyst utilizes what is produced during refining.

Also, the strength-promoting activator may comprise 25 to 65 wt% of manganese oxide; 20 to 55% by weight of desulfurized gypsum, and 5 to 45% by weight of refining slag.

At this time, the gangue is obtained from the glass manufacturing process, and the SO ₃ component is 30 to 45%; Na ₂ O component is 15 to 25%;

It is preferable that the desulfurization gypsum is obtained from a fluidized bed combustion boiler desulfurization process in which one or two or more petroleum cokes or bituminous coal fuels are mixed and fueled. The desulfurized gypsum preferably contains 30 to 65% of CaO and 10 to 35% of SO ₃ .

In addition, the refining slag uses an electric furnace and a furnace obtained from the refining process. The refining slag has a CaO content of 35 to 50%; MgO is preferably 5 to 10%;

The dispersant is at least one selected from the group consisting of naphthalene series, lignin series and polycarboxylic acid series.

The fire-retardant composition using the cyclic resource obtained according to the present invention has a specific surface area of 3,000 to 5,500 cm 2 / g.

<Construction method>

The present invention includes a construction method of applying 80% to 120% of water to 100% by weight of the fire-retardant composition using the above-described recycled resources by a deep layer mixing treatment method.

The fire retardant composition according to Example 1 of the present invention was prepared by mixing and kneading 73 wt% of a pozzolanic synthetic material, 25 wt% of a strength promoting activator, and 2 wt% of a polycarboxylic acid dispersant. The specific surface area of the fire retardant composition was 4,535 cm 2 / g.

The fire retardant composition according to Example 2 of the present invention was prepared by mixing and kneading 69% by weight of a pozzolanic synthetic material, 29% by weight of a strength promoting activator, and 2% by weight of a polycarboxylic acid dispersant. The specific surface area of the fire retardant composition was 3,895 cm 2 / g.

Comparative Example 1

The hot-fire composition according to Comparative Example 1 was prepared by mixing and kneading 73% by weight of fine blast-furnace slag powder, 25% by weight of a strength-promoting activator, and 2% by weight of a polycarboxylic acid-based dispersant among pozzolanic synthetic materials. And the specific surface area of Comparative Example 1 was 4,750 cm &lt; 2 &gt; / g.

Comparative Example 2

The fire retardant composition according to Comparative Example 2 was prepared by mixing and kneading 73 wt% of thermal power plant fly ash, 25 wt% of strength promoting activator, and 2 wt% of polycarboxylic acid dispersant as a pozzolanic synthetic material. And a specific surface area of 3,685 cm &lt; 2 &gt; / g in Comparative Example 2 was prepared.

[Comparative Example 3]

The fire-retardant composition according to Comparative Example 3 was prepared by mixing and kneading 98 wt% of common ordinary Portland cement and 2 wt% of polycarboxylic acid-based dispersant. And the specific surface area of Comparative Example 3 was 3,325 cm 2 / g.

[Comparative Example 4]

The fire-retardant composition according to Comparative Example 3 was prepared by mixing and blending 98 weight% of blast-furnace slag cement and 2 weight% of a polycarboxylic acid-based dispersant. And the specific surface area of Comparative Example 4 was 4,045 cm &lt; 2 &gt; / g.

<Performance evaluation>

The following describes the results of 1) slurry fluidity and 2) solidification uniaxial compression test for the fire-retardant compositions obtained from the above-described Example 1, Example 2 and Comparative Examples 1 to 4.

1) Slurry fluidity evaluation

First, a fire retardant composition according to Example 1, Example 2 and Comparative Examples 1 to 4 was prepared, and the slurry was dripped at a temperature of 23 ± 1 ° C by a grouting device under a test method of KS F 4044 Respectively.

The following Table 1 shows the results of the measured drought time.

division


Water weight (%)
Slurry descending time (sec)

Early

60 minutes later
Example 1

80
8.50
8.30
Example 2

80
7.90
7.75
Comparative Example 1

100
9.20
8.90
Comparative Example 2

100
9.40
9.35
Comparative Example 3

100
8.65
8.50
Comparative Example 4

100
9.30
9.20

As shown in Table 1, Example 1 and Example 2 contained 80 wt% of water, and Comparative Example contained 100 wt% of water. To improve the fluidity, 2 wt% of the same polycarboxylic acid-based admixture was added as an admixture. As a result, as shown in Table 1, it can be seen that the descending time of the embodiments is faster than the descending time of the comparative examples.

This means that the slurry fluidity of the examples according to the present invention is equal to or faster than the falling time of the comparative examples, and the fluidity is improved by delaying the initial reaction time of the pozzolanic compound.

Further, the improvement of the fluidity can reduce the amount of water used by 20% compared to the case of using the conventional blast furnace slag or Portland cement, and since the fluidity is maintained even when the amount of water is reduced in the production of the fire slurry injected into the paperboard, It is advantageous for the expression, and the amount of the discharged sludge discharged is also reduced, so that it can be said to be environmentally friendly.

2) Single Axis Compression Test

The target clay was mixed with sea water clay having a water content of 44.9% and a wet density of 1.754 g / cm &lt; 3 &gt; by adding 200 ~ 250 kg / cm &lt; 3 & × 10 cm height of the cylindrical mold.

The specimens were sealed and cured at 23 ± 1 ℃ during the ages (7 and 28 days), and then uniaxial compressive strength was measured by the KS F 2314 method. [Table 2] shows the measurement results.

division

Addition amount (/)

Water content (%)
Axial Compressive Strength (/)


Specific surface area (cm ² / g)
7 days

28th
Example 1

200
80
27.6
45.3
4,535
Example 2

250
80
25.8
46.8
3,895
Comparative Example 1

250
100
23.8
41.4
4,750
Comparative Example 2

250
80
18.9
38.9
3,685
Comparative Example 3

250
80
22.3
42.5
3,325
Comparative Example 4

250
100
23.8
43.8
4,045

As shown in Table 2 above, in Example 1 of the present invention, the content of the solidification amount was 200 kg / cm 3, and the axial pressure obtained therefrom was 45.3 kg / cm 2, and in Comparative Examples 1 to 4 Cm &lt; 3 &gt; / cm &lt; 2 &gt;. In the case of the second embodiment, the axial pressure is 46.8 kg / cm &lt; 2 &gt;

It can be seen that the superiority of the axial pressure is the same even at the age of 7 days.

From the results of the fluidity test and the unconfined compressive strength test, it can be seen from the above that, according to the present invention, even though the addition amount of the fireproofing for obtaining the predetermined compressive strength is smaller than that of the conventional cement or blast furnace slag cement, Expression is equal to or higher than that of the wild type.

Claims (12)

65.0-85.0 wt% pozzolanic synthetic material;
5.0-45.0% by weight strength activator; And
0.1 ~ 5.0% by weight of a dispersant; solidified fire composition using a circulating resource, characterized in that consisting of. The method of claim 1,
The pozzolanic synthetic material may be,
45 to 65% by weight of fine blast furnace slag powder;
10 to 45 wt% of fly ash produced from coal-fired power plants;
10 to 45% by weight of a burned material produced from a boiler of a thermal power plant; And
0 to 30% by weight of zeolite-based fluid catalytic cracking circulation catalyst produced during the refinery; solidified composition using a circulating resource, comprising a. The method of claim 1,
The strength-
25 to 65% by weight of gum;
20 to 55 wt% of desulfurized gypsum, and
And 5 to 45% by weight of refining slag. The method of claim 3, wherein
Wherein said gangue is obtained in a glass manufacturing process. 5. The method of claim 4,
The above-
The SO ₃ component is 30 to 45%; and
And the Na ₂ O content is 15 to 25%. The method of claim 3, wherein
Wherein the desulfurization gypsum is obtained from a fluidized bed combustion boiler desulfurization process in which one or more petroleum cokes or bituminous coal fuels are mixed and fueled. The method according to claim 6,
In the desulfurized gypsum,
The CaO component is 30 to 65%; and
And SO ₃ is 10 to 35%. The method of claim 3, wherein
Characterized in that the refining slag is obtained from an electric furnace and a refining process. The method of claim 8,
The refining slag
The CaO component is 35 to 50%; and
And MgO is 5 to 10%. The method of claim 1,
Wherein the dispersing agent is at least one selected from the group consisting of naphthalene, lignin and polycarboxylic acid. The method according to any one of claims 1 to 10,
Wherein the composition has a specific surface area of 3,000 to 5,500 cm 2 / g. A construction method comprising 80 to 120% of water with respect to 100% by weight of the solidified material composition according to any one of claims 1 to 10, and constructing it by a deep mixing process.