KR101347792B1 - Environment-friendly concrete composition using seaweeds and constructing methods using thereof - Google Patents

Abstract

The present invention provides a concrete composition, on the basis of 100 parts by weight of cement having 3,200-6,500 cm2/g of fineness, comprises: 10-40 parts by weight of seaweeds; 10-1,000 parts by weight of aggregates; 10-100 parts by weight of finely-ground fly ash having 3,000-3,800 cm2/g of fineness and 1.5-2.8 g/cm3 of density; 10-70 parts by weight of blast furnace slag; and 0.01-10 parts by weight of a high performance water reducing agent as a high performance water reducing agent comprising 80- 95 wt% of a naphthalene-based high performance water reducing agent and 5-20 wt% of a polycarboxylic acid-type high performance water reducing agent, such that a total of air capacity becomes 4-6 % of the concrete, and additionally comprises, on the basis of 100 parts by weight of cement, 1-15 parts by weight of: one viscosity reducing agent selected from trimethyl acid ester, benzoic acid ester, ethylcyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate; one filler selected from silica, acryl powder, and silica sand; and one dispersant selected from a nonionic dispersant, an anionic dispersant, and a cationic dispersant. The concrete composition of the present invention can provide a concrete composition having enhanced durability and compression strength and low percentage of contraction so as to have excellent quality using seawees that can be commonly obtained.

Description

Environment-friendly Concrete Composition Using Seaweeds and Constructing Methods Using Thereof}

The present invention relates to a concrete composition, and more particularly to an environmentally friendly general concrete composition using seaweed.

Concrete is chopped by wrapping the aggregate with cement paste using a hydration reaction in which cement reacts with water, and has become the center of civil works such as dams, pavements and bridges, or building structural materials.

An object of the present invention is to provide an eco-friendly concrete composition using seaweed used as a structural material for civil works or construction such as dams or pavement and bridges.

In addition, the present invention is to provide a low-cost concrete composition with improved durability, compressive strength and the like required by the concrete composition.

The present invention
Based on 100 parts by weight of cement having a powder degree of 3,200 to 6,500 cm ² / g,
10 to 40 parts by weight of seaweed;
10 to 1,000 parts by weight of aggregate;
10 to 100 parts by weight of fine pulverized fly ash having a particle size of 3,000 to 3,800 cm ² / g and a density of 1.5 to 2.8 g / cm ³ ;
10 to 70 parts by weight of blast furnace slag; And
0.01 to 10 parts by weight of a high-performance water reducing agent which is a high-performance water reducing agent composed of 80 to 95% by weight of a naphthalene-based high performance water reducing agent and 5 to 20% by weight of a polycarboxylic acid type high-performance water reducing agent so that the total amount of air in the concrete is 4 to 6% Including,

A filler selected from trimesic esters, benzoic acid esters, ethylcyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate, a taper, silica, acrylic powder, and silica sand; And it provides a concrete composition further comprises 1 to 15 parts by weight based on 100 parts by weight of the dispersing agent which is one selected from nonionic dispersing agent, anionic dispersing agent, cationic dispersing agent.

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In addition,
Removal of foreign objects on the construction surface after cleaning - Cleaning step;

10 to 40 parts by weight of seaweed based on 100 parts by weight of cement having a powder degree of 3,200 to 6,500 cm ² / g on the surface of the foreign material removal-cleaning step; 10 to 1,000 parts by weight of aggregate; 10 to 100 parts by weight of fine pulverized fly ash having a particle size of 3,000 to 3,800 cm ² / g and a density of 1.5 to 2.8 g / cm ³ ; 10 to 70 parts by weight of blast furnace slag; And a high performance water reducing agent having 80% to 95% by weight of a naphthalene-based high performance water reducing agent, and having a polycarboxylic acid type high performance water reducing agent having a total weight of air of 4 to 6% by volume of 0.01 to 10% by weight. It includes, but is selected from trimesic acid ester, benzoic acid ester, ethyl cyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate, a taper, silica, acrylic powder, silica The pouring step of mixing the concrete composition further comprising 1 to 15 parts by weight based on 100 parts by weight of cement and one of the fillers, and a non-ionic dispersant, an anionic dispersant, a cationic dispersant selected from 100 parts by weight of cement ; And it provides a construction method of the concrete composition comprising a curing step of curing the concrete composition for waterproofing after the pouring step is finished.

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The concrete composition of the present invention may provide a concrete composition having excellent quality by improving durability, compressive strength, and the like, by using seaweeds which are commonly obtained, and having low shrinkage.

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention is based on 100 parts by weight of cement, 10 to 40 parts by weight of seaweed; 10 to 1,000 parts by weight of aggregate; 10 to 100 parts by weight of fly ash; 10 to 70 parts by weight of blast furnace slag; And 0.01 to 10 parts by weight of a high-performance water reducing agent.

According to another aspect of the present invention, there is provided a cleaning method comprising: a foreign matter removal-cleaning step of removing foreign matters on a construction surface and cleaning the foreign matter; 10 to 40 parts by weight of seaweed based on 100 parts by weight of cement on the surface of the foreign material removal-cleaning step; 10 to 1,000 parts by weight of aggregate; 10 to 100 parts by weight of fly ash; 10 to 70 parts by weight of blast furnace slag; And 0.01 to 10 parts by weight of a high-performance water reducing agent is mixed with water and poured; And a curing step of curing the concrete composition after the pouring step is completed.

The concrete composition according to the present invention, preferably the eco-friendly concrete composition using algae, all construction including various civil construction works such as repair work and bridges, road improvement, tunnels, dams, etc. It is applied to various concrete products by on-site manufacturing and factory manufacturing.

The cement according to the present invention is not particularly limited as long as it is a cement commonly used in the art, and preferably, general portland cement or special cement such as blast furnace slag cement, ultra fine powder cement, or the like may be used.

The preferred powder of the cement is preferably 3,200 to 6,500 cm ² / g.

The content of the remaining components other than cement of the waterproof concrete composition according to the present invention is based on 100 parts by weight of cement.

Seaweed according to the present invention is included in the waterproof concrete composition, in particular, environmentally friendly waterproof concrete composition to prevent the waterproof concrete composition is largely shrinkage during drying and curing to prevent cracking or weakness due to weak bending and impact strength.

In addition, the algae is to promote the bonding of the components constituting the waterproof concrete composition, and to prevent cracking, any algae having this purpose may be used.

Here, since about 8,000 species of algae live in the world and about 500 species live in the sea of Korea, all of them can be used, but it is preferable to use at least one of green algae, brown algae, red algae, or at least one of them as preferable algae.

Examples of the preferable algae include, but are not limited to, green algae include, but are not limited to, seaweed, hallaria, chrysanthemum, sea bass, parasitoids, However, the present invention is not limited thereto, and the red algae may be selected from the group consisting of red algae such as red algae, black algae, Can be used, such as bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, bamboo, But is not limited thereto.

As a specific aspect, seaweeds according to the present invention may be used in the form of dried seaweeds, seaweeds in the form of powders or concentrates in concentrated form, but it is advisable to use a solid form of dried powder after being dried.

The preferred amount of seaweed is 10 to 40 parts by weight based on 100 parts by weight of cement.

The aggregate according to the present invention is a construction-use mineral material that can be consolidated into a lump by a binder such as concrete, and is chemically stable.

Aggregate refers to sand, gravel, basalt, stones, basalts, and the like that are mixed with cement and water to produce bridges, ie, concrete for paving bridges.

Specifically, the aggregate may further include basic rock carcasses having a particle size of about 25 mm and an absorption rate of about 0.7% and / or bauxite having a particle size of about 5 mm and an absorption rate of 5.40%.

The aggregate having a size of 0.074 mm or more but less than 4.76 mm is called a fine aggregate, and a material having a diameter of 4.76 mm or more is called a coarse aggregate. The amount of the aggregate to be used is preferably 10 to 1,000 parts by weight based on 100 parts by weight of the cement. The mixing amount of the fine aggregate and the coarse aggregate contained in the aggregate is not particularly limited and can be appropriately adjusted as needed.

The fly ash according to the present invention refers to the coal ash collected by the dust collector from the flue gas of the boiler for burning pulverized coal, the spherical particle size is about the same as cement, alumina and silica is the main component, as a mixed material of concrete Used. When used in combination with cement, it is economical because workability is improved, heat of curing is alleviated, and long-term strength and water tightness are improved. The content of the fly ash is not particularly limited and may be appropriately adjusted as necessary, for example, 10 to 100 parts by weight based on 100 parts by weight of cement may be used.

As a specific aspect, the fly ash according to the present invention can use finely pulverized fly ash, and the finely pulverized fly ash provides improved high strength and / or fluidity than using non-pulverized fly ash .

The fineness of the pulverized fly ash according to the present invention is in the range of 3,000 to 3,800 cm ² / g, preferably 3,000 to 3,800 cm ² / g, more preferably 3,700 cm ² / g, Cm < ² >, preferably about 2.2 g / cm < ³ >.

The blast furnace slag according to the present invention is a slag generated when making pig iron from iron ore in a blast furnace, and impurities other than iron are collected, and 500 to 1,000 kg per tonne of pig iron is used and is used as a mixed material of concrete. The content of blast furnace slag is not particularly limited and may be appropriately adjusted as necessary, for example, 10 to 70 parts by weight based on 100 parts by weight of cement may be used.

The high-performance water reducing agent according to the present invention is an admixture used to uniformly disperse small air bubbles in a concrete when constructing concrete. It is good in causing bubbles and generates small bubbles evenly in the concrete to improve freezing and thawing resistance, corrosion resistance, durability And so on.

Particularly, the water reducing agent is added to the pre-mixed base concrete to make it smoother by stirring it, and is used for the purpose of improving the workability of the concrete without deteriorating the quality of the concrete.

Furthermore, the water reducing agent has a secondary effect such as facilitating the pouring work by improving the fluidity of the concrete composition, lowering the thermal conductivity of hard concrete, and improving water tightness.

At this time, the water reducing agent used in the concrete composition generally has a water reducing rate of about 10 to 15%, but a water reducing rate of 20 to 30% is generally referred to as a high-performance water reducing agent in the present invention.

The preferred high performance water reducing agent is preferably a naphthalene type, a melamine type, a polycarboxylic acid type, an aminosulfonic acid type water reducing agent or a mixture thereof. The content thereof is not particularly limited and can be appropriately adjusted as required. 0.01 to 10 parts by weight may be used.

Typical examples of the naphthalene-type water reducing agent include modified lignin, alkylarylsulfonic acid and active persistent polymer, a polyalkylisocyanate and a reactive polymer, an alkylarylsulfonic acid salt condensate, a sulfonic acid group carboxyl group-containing polyol polymer, an alkylnaphthalene sulfonate, Sulfonic acid salt-modified lignin co-condensates, modified lignin, lignin derivatives and alkylaryl sulfonates, or at least one selected from these.

Representative examples of the melamine-type water reducing agent include a modified methylmelamine condensate and a water-soluble special polymer compound, a sulfonated melamine condensate, and a mixture of at least one selected from the foregoing.

Representative examples of the polycarboxylic acid type water reducing agent include a copolymer containing an unsaturated carboxylic acid monomer as a single component or a salt thereof such as poly (alkylene glycol) monoacrylate, poly (alkylene glycol) monomethacrylate, Styrene copolymers, copolymers of acrylates and methacrylates, and copolymers derived from monomers copolymerizable with these monomers.

Typical examples of the aminosulfonic acid-based water reducing agent include an aromatic aminosulfonic acid-based polymer compound, an aromatic polymer condensate, a lignin sulfonic acid derivative, and a mixture of at least one selected from the foregoing.

It is also preferable to use a naphthalene-type high-performance water reducing agent alone or a mixed composition comprising 80 to 95 wt% of a naphthalene-based high-performance water reducing agent and 5 to 20 wt% of a polycarboxylic acid-type high-

The amount of the high-performance water reducing agent is preferably such that the total amount of air in the concrete is about 4 to 6% by volume. If it is used too much, it will not only be economical but also cause various obstacles such as reduction of compressive strength and deterioration of bond strength with reinforcing steel, so proper usage should be strictly observed.

In a specific embodiment, the concrete composition according to the present invention may additionally comprise at least one additive selected from the group consisting of an additive such as a depressant, a pigment, a filler, a defoamer, a dispersant, a surfactant, an antioxidant, As shown in FIG.

The amount of the depressants, pigments, fillers, defoamers, dispersants, surfactants, antioxidants and / or flow inhibitors used as the additives is preferably those used in the art, Preferably 1 to 15 parts by weight.

In one embodiment, the taper is preferably one of trimesic acid ester, benzoic acid ester, ethylcyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate.

The pigment is used to add color to the flooring to be constructed, and any pigment may be used as long as it is a conventional pigment in the art having this purpose.

As the preferable pigment, it is preferable to use an inorganic pigment and / or an organic pigment.

The inorganic pigments include iron oxide, iron hydroxide, chromium oxide, titanium oxide, or mixtures thereof.

At this time, iron oxide and iron hydroxide show reddish brown color, chromium oxide shows green, and titanium oxide shows white.

The organic pigments may be carbon black, azo pigments or mixtures thereof.

The filler may be silica, acrylic powder, silica sand, etc.

The dispersant is not particularly limited as long as it is a dispersant commonly used in the art, but it is recommended to use a nonionic, anionic, and / or cationic dispersant.

The concrete composition according to the present invention can be used for building construction, landscaping, maintenance / maintenance in use, and can be used for stairs, roads, curb, foundation, pillars, walls, roads, percussion, lighting facilities, / It can be used to fill or reinforce damaged area.

Referring to the construction method of the concrete composition according to the present invention having such a configuration, specifically the eco-friendly concrete composition using seaweed as follows.

Here, the method of applying the concrete composition is not particularly limited, but preferably includes a foreign matter removal-cleaning step of removing foreign matter on the construction surface and cleaning the foreign matter.

10 to 40 parts by weight of seaweed based on 100 parts by weight of cement on the surface of the foreign material removal-cleaning step; 10 to 1,000 parts by weight of aggregate; 10 to 100 parts by weight of fly ash; 10 to 70 parts by weight of blast furnace slag; And 0.01 to 10 parts by weight of a high-performance water reducing agent is mixed with water and poured; And

And a curing step of curing the concrete composition after the pouring step is completed.

Hereinafter, the present invention will be described in detail by way of examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Example 1

A concrete composition was prepared by mixing 2 g of a high performance water reducing agent consisting of 100 g of Portland cement, 20 g of prickly blue aggregate, 300 g of coarse aggregate, 50 g of fly ash, 25 g of blast furnace slag, and polymonoacrylate.

[Example 2]

It was carried out in the same manner as in Example 1, but using 10g of vines, 5g of wakame seaweed and 5g of loaves instead of 20g of spiny blue.

[Example 3]

In the same manner as in Example 1, but was carried out using 5g 다시, 5g kelp and 10g moss instead of 20g thorn blue.

Example 4

It was carried out in the same manner as in Example 1, but instead of 20g of thorny green grass 3g, wakame 3g, wakame 3g, saeju 3g, Eckloniae 3g, 3g and 3g of stalks.

[Example 5]

The procedure of Example 1 was repeated, except that 5 g of a dimer containing trimester was further added.

[Example 6]

The procedure of Example 1 was repeated, except that 5 g of silica filler was further added.

[Experiment]

For the compositions prepared according to Examples 1 to 6, the dry shrinkage rate and the compressive strength at low temperature and standard condition were measured. The compressive strength was measured by using a concrete compressive strength tester. Dry shrinkage (microns) was measured by a comparator method on 26 concrete specimens, each of which was stored under the conditions of 20 ° C × 60% RH. And the drying shrinkage ratio was determined. The smaller this value, the smaller the drying shrinkage.

Air content (%) Slump (mm) Dry shrinkage (u) Compressive strength (MPa) Low temperature (5) Standard state (20) 24 hours 28 days Example 1 0.7 225 179 6.9 78 Example 2 0.9 224 177 6.5 77 Example 3 0.9 223 181 6.5 76 Example 4 0.8 221 181 6.8 79 Example 5 0.8 222 182 6.6 78 Example 6 0.8 220 180 7.1 79

As shown in Table 1, it can be seen that the compressive strength and dry shrinkage rate of the concrete compositions prepared according to Examples 1 to 6 satisfy the physical properties required by the conventional concrete compositions.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are all illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention without departing from the scope of the present invention.

Claims (5)

Based on 100 parts by weight of cement having a powder degree of 3,200 to 6,500 cm ² / g,
10 to 40 parts by weight of seaweed;
10 to 1,000 parts by weight of aggregate;
10 to 100 parts by weight of fine pulverized fly ash having a particle size of 3,000 to 3,800 cm ² / g and a density of 1.5 to 2.8 g / cm ³ ;
10 to 70 parts by weight of blast furnace slag; And
0.01 to 10 parts by weight of a high-performance water reducing agent which is a high-performance water reducing agent composed of 80 to 95% by weight of a naphthalene-based high performance water reducing agent and 5 to 20% by weight of a polycarboxylic acid type high-performance water reducing agent so that the total amount of air in the concrete is 4 to 6% Including,
A filler selected from trimesic esters, benzoic acid esters, ethylcyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate, a taper, silica, acrylic powder, and silica sand; And 1 to 15 parts by weight of the dispersant, which is one selected from nonionic dispersants, anionic dispersants, and cationic dispersants, based on 100 parts by weight of cement. The method of claim 1,
The seaweed is thorny blue sea, hole blue, cheontae, haecam, green, hearing, bead hearing, jade, beads of seaweed, seaweed, kelp, walnut horse, jinjimal, l, hookberry, seaweed, taebok, gompi, rhubarb , Seaweed miscellaneous cousin, mother and child, hoe-sama mother, worm, 톳, laver, ladle, larva A concrete composition comprising at least two or more selected from among silk, grass, edible, stone, stone, jinari, or these.
delete delete Removal of foreign objects on the construction surface after cleaning - Cleaning step;
10 to 40 parts by weight of seaweed based on 100 parts by weight of cement having a powder degree of 3,200 to 6,500 cm ² / g on the surface of the foreign material removal-cleaning step; 10 to 1,000 parts by weight of aggregate; 10 to 100 parts by weight of fine pulverized fly ash having a particle size of 3,000 to 3,800 cm ² / g and a density of 1.5 to 2.8 g / cm ³ ; 10 to 70 parts by weight of blast furnace slag; And a high performance water reducing agent having 80% to 95% by weight of a naphthalene-based high performance water reducing agent, and having a polycarboxylic acid type high performance water reducing agent having a total weight of air of 4 to 6% by volume of 0.01 to 10% by weight. It includes, but is selected from trimesic acid ester, benzoic acid ester, ethyl cyclohexane, 2,2,4-trimethyl-1,3-pentanediol diisobutylate, a taper, silica, acrylic powder, silica The pouring step of mixing the concrete composition further comprising 1 to 15 parts by weight based on 100 parts by weight of cement and one of the fillers, and a non-ionic dispersant, an anionic dispersant, a cationic dispersant selected from 100 parts by weight of cement ; And a curing step of curing the waterproof concrete composition after the pouring step is completed.