KR101425829B1 - Environment-frendly soil agent for preventing from growing weeds and constructing method by the same - Google Patents

Abstract

The present invention relates to a soot soil composition which prevents weeds from growing on a sidewalk by utilizing an environmentally friendly fire, and more particularly, to a soil soot composition using dredged soil and dirt soil dredged from reservoirs and streams, Soil concrete type grass soot composition which prevents the growth and growth of weeds for the purpose of safety walking of pedestrians and prevention of traffic accidents by mixing eco-friendly fire extinguishing agent which does not use cement at all .
The environmentally friendly grass soot composition according to the present invention comprises 10 to 35 parts by weight of a fireproofing material based on 100 parts by weight of the earthy material having a particle size of 40 mm or less and the fireproofing is a fireproofing material containing 20 to 60% of calcium oxide (CaO) 150 to 250 parts by weight of fine blast furnace slag and 20 to 40 parts by weight of Petroleum coke desulfurization gypsum based on 100 parts by weight of the high calcium incineration residue generated in the desulfurization type coal combustion incinerator.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an artificial soil composition using an environmentally friendly fire-

The present invention relates to a soot soil composition which prevents weeds from growing on a sidewalk by utilizing an environmentally friendly fire, and more particularly, to a soil soot composition using dredged soil and dirt soil dredged from reservoirs and streams, Soil concrete type grass soot composition which prevents the growth and growth of weeds for the purpose of safety walking of pedestrians and prevention of traffic accidents by mixing eco-friendly fire extinguishing agent which does not use cement at all .

Generally, downtown roads are divided into roads and sidewalks, and the road side has a boundary block to prevent the entry of cars and to ensure the safety of pedestrians. However, in the case of rural roads other than rural areas or urban areas, the distinction between roads and roads is unclear, and weeds are abundant in the roads adjacent to the pavement, ie, , And the safety of pedestrians is also threatened.

In order to solve this problem, weeding measures such as regular weeding and spraying of herbicides are used, but it is impossible to completely eliminate the weed's root elimination or propagation as long as the seeds or roots of the weeds remain on the roadbed. Do.

However, as is well known, cement has a bad influence on the surrounding vegetation due to heavy metals and other harmful substances, and it has a problem of excessive rigidity The walking feeling is not good.

There are also many ways to construct roads by mixing soil with cement or fire. Korean Patent Registration No. 10-0374122 discloses a method for producing a cement admixture which comprises mixing 100 parts by weight of portland cement with 20 to 200 parts by weight of blast furnace slag powder, 5 to 40 parts by weight of gypsum and 5 to 30 parts by weight of lime, Korean Patent No. 10-0762975 discloses a technique of adding 90 to 95% by weight of blended cement or portland cement of blast furnace slag cement and fly ash cement, 5 to 10% by weight of an inorganic salt consisting of aluminum sulfate and sodium carbonate % Of the total area of the pavement. In Korean Patent No. 10-0880602, a small amount of a promoter, a retarder, a defoaming agent and a surfactant are added to 35 to 60 wt% of ordinary portland cement, 15 to 25.5 wt% of alumina cement or CSA and 5 to 15 wt% of gypsum as cement- And a fluidizing agent are added. However, all of these techniques are based on replacing aggregate in cement concrete with earth as a cement fireproofing material, so that it can be said that the environmental damage of cement concrete is intact.

In addition, most of the materials proposed for the existing soil fire or loess material are usually used alone or in combination with fly ash, lime or CSA as the main material of cement. Cement is a business that discharges a large amount of CO ₂ gas during the manufacturing process. Cement is mainly produced from limestone, clay and iron ore as raw materials, and is produced by pyrolysis at high temperature using coal as fuel. That is, It can not be said to be environmentally friendly. The gypsum used as an additive is an expensive material that is not available in Korea. It is a high-priced material that depends on imports. Alumina cement and CSA are also very expensive special cements produced by adjusting chemical components such as alumina When these are adopted for construction, there is a disadvantage that it is not economical.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a soil-concrete type fume mixed with eco-friendly fireproofing which uses dredged soil of a reservoir or a waterway, The present invention also provides a grass soot composition for preventing unauthorized walking and traffic accidents by preventing weeds from growing on the unploved farm roads and unpaved areas of pavement shoulder roads.

In order to solve the above-mentioned technical problem, the environmentally friendly soil layer composition according to the present invention comprises 10 to 35 parts by weight of a fireproofing material based on 100 parts by weight of the earthy material having a particle size of 40 mm or less, , 150 to 250 parts by weight of blast furnace slag powder and 20 to 40 parts by weight of Petroleum coke desulfurization gypsum based on 100 parts by weight of high-calcium incineration residue generated in the furnace.

In addition, it is preferable that the above-mentioned fireproofing further comprises 20 to 40 parts by weight of by-products generated in the desulfurization and de-phosphorification step of the steelworks, with respect to 100 parts by weight of the high-calcium incineration residue, wherein the calcium hydroxide (CaOH ₂ ) content is 50% by weight or more.

The method of the present invention comprises the steps of (1) removing weeds and trees in a field to construct a farmland and a shoulder with a grass paste; 2) dug out the construction site from which weeds and trees are removed to a certain depth and stop; 3) preparing an artificial soil composition using on-site soil and nearby dredged soil and fire; And 4) laying the grass soot composition with the given construction thickness and drainage gradient taken into consideration.

Also, it is preferable that after step (4), (5) step of constructing a joint to prevent breakage due to shrinkage and expansion of the package formed by step (4).

The above-mentioned fire-proofing is carried out in such a manner that 150 to 250 parts by weight of a fine powder of blast furnace slag and 150 to 250 parts by weight of Petroleum coke desulfurized gypsum are mixed with 100 parts by weight of a high-calcium incinerator remnant produced in a furnace desulfurization type coal combustion incinerator having a calcium oxide (CaO) Preferably 20 to 40 parts by weight.

In addition, it is preferable that the above-mentioned fireproofing further comprises 20 to 40 parts by weight of by-products generated in the desulfurization and de-phosphorification step of the steelworks, with respect to 100 parts by weight of the high-calcium incineration residue, wherein the calcium hydroxide (CaOH ₂ ) content is 50% by weight or more.

According to the present invention, soil-concrete-type grass soils are prepared by mixing dredged soil of a reservoir, a dredged soil of a waterway, and soil-based soil, and mixing environmentally friendly fireproofing materials that do not use cement as a binder at all, Thereby preventing a safe walking and a traffic accident from occurring.

Therefore, eco-friendly construction is possible because it does not use portland cement produced by melting limestone, clay and iron ore at high temperature by coal fired furnace.

Hereinafter, the soil layer composition using the environmentally friendly fireproofing according to the present invention will be described in detail.

First, the soil-soil composition using the environmentally friendly fire-fighting according to the present invention is a soil concrete form mixed with soil or near-site reservoir or dredged soil in the site of the soil application site and environmentally friendly fire without using cement at all The present invention provides a grass soap composition which prevents the occurrence of weeds from growing on a non-paved road and a pavement of pavement roads to prevent safe walking and traffic accidents.

More specifically, the soil layer composition using the environmentally friendly fireproofing includes 10 to 35 parts by weight of an environmentally friendly fireproofing material containing no cement, based on 100 parts by weight of the soil.

Further, the above-mentioned fire-proofing is preferably carried out by adding 150 to 250 parts by weight of a fine powder of blast furnace slag, 150 to 250 parts by weight of Petroleum coke desulphurization gypsum to 100 parts by weight of a high-calcium incineration residue generated in a furnace for desulfurization type coal combustion incinerator having a calcium oxide (CaO) content of 20% 20 to 40 parts by weight of calcium hydroxide and 20 to 40 parts by weight of by-products generated in a desulfurization and de-phosphorification step of a steelworks, wherein the content of calcium hydroxide (CaOH ₂ ) is 50% by weight or more.

The present invention also relates to a method for manufacturing a grassland, comprising the steps of removing weeds and trees from a field to construct a grassland and a shoulder with a grassland, dugging the grassland with the weeds and trees removed to a certain depth, The method comprising the steps of: preparing a soil layer composition by using fire; laying the composition by using various equipments in consideration of a certain laying thickness and drainage gradient; .

In the case of the dredged soil and the on-site soil, a process of selectively removing raw materials having a particle size of 40 mm or more is required. In this sorting process, first, aggregate of 40 mm or more should be selected using a vibrating net having a size of about 40 mm. When the particle size exceeds 40 mm, it is difficult to finish the package due to particles that are too large when the soil is formed.

Also, the soil-release composition using the environmentally friendly fireproofing includes 10 to 35 parts by weight of an environmentally friendly fireproofing material containing no cement, based on 100 parts by weight of the gypsum.

In addition, the environmentally friendly fire extinguishing agent is used in an amount of 150 to 250 parts by weight of blast furnace slag fine powder, 100 parts by weight of Petroleum coke desulfurization 20 to 40 parts by weight of gypsum and 20 to 40 parts by weight of byproducts generated in a desulfurization and de-phosphorification step of a steel mill, with a calcium hydroxide (CaOH ₂ ) content of 50 wt% or more.

In the case of a large-scale PC boiler of a general coal-fired power plant, since the sulfur component of the coal used as the fuel is operated with a separate desulfurization facility, the incinerator is mainly composed of SiO _2, but the incinerator The residues are incineration residues mainly generated in small- and medium-sized cogeneration power plants, and do not have a separate desulfurization facility but combine coal and limestone to combine the sulfur component of coal with oxygen in the air to convert the sulfur dioxide produced in the limestone into decarbonated CaO , Which has a relatively high content of CaO in coal ash ash because it undergoes a furnace desulfurization process.

In-Furnace Desulfurization Method High-Calcium Calcium oxide, which is contained in a large amount in the incineration residue, reacts with water and absorbs, exothermic, and expands to become calcium hydroxide. The reaction formula is as follows.

CaO + H ₂ O-> Ca (OH) ₂ + 15.6 kcal mol ^-1

In general, incineration residues such as PC boiler coal-fired fly ash are mainly recycled as concrete admixture because they have SiO ₂ as a main component and have a high glassification rate and have pozzolanic reactivity. However, It can not be used as a concrete admixture because of its heat and expansion characteristics. However, such chemical reaction of heat absorption and expansion compensates shrinkage which is a disadvantage of cement, and absorbs moisture of the soil particles early, thereby stabilizing the ground rapidly.

Therefore, the present invention utilizes a high-calcium incineration residue in a furnace desulfurization type which can not normally be used as a concrete admixture material.

Also, the blast furnace slag fine powders exhibited excellent strength when tested in comparison with the converter slag fine powders, steel making slag fine powders, stainless steel slag fine powders and copper smelting fine powders produced through a similar process.

Such blast furnace slag fine powder is referred to as latent hydraulic material because CaO is contacted with main component or water to form an oxide film and does not hydrate itself. In order to exhibit potential hydraulic stability, the oxide film must be destroyed. The material that stimulates the CaO is the high-calcium incinerator, petroleum coke desulfurization gypsum, and CH, which is a by-product of desulfurization and degassing process of steelworks.

In addition, the petroleum gypsum desulfurization gypsum is a material for generating a large amount of etrinite at the initial stage of the reaction, and is produced as waste in an incinerator. Therefore, it is more economical than the phosphate gypsum that is required to undergo a dehydration process Do.

In addition, the by-product of the desulfurization and deoxidation process at the steel mill is a particulate matter, which is also composed mainly of CaO.

The strength of the slag powder and sulphate stimulant chemistry in the early ages is manifested by the C-S-H gel produced simultaneously with a large amount of ettringite skeleton. In addition, the CSH gel surrounds Etringite. As the age elapses, the amount of the CSH gel continuously increases and the CSH gel tightly fills the pores of the cured paste, forming a dense network network structure with etringing, .

As described above, the environmentally friendly fireproofing of the present invention is a material which does not use portland cement at all, and uses pyrogenic incineration residues and blast furnace slag fine powder containing a large amount of amorphous free CaO as raw materials. Blast furnace slag, pyrogenic incineration residue, etc., unlike cement itself, does not hydrate with water itself, but has a hardening characteristic of inducing hydration reaction by addition of a stimulant such as hydroxide or sulfate. Such hydration characteristics are irregular three- As the chain bond is broken, modified ions such as Ca ^{2 +} , Mg ^{2 +} , and Al ^{3 +} contained in the reticulated structure are eluted to have hardening properties like cement. In the eco-friendly fire-fighting composition to be applied to the present invention, SiO ₂ , Al ₂ O ₃ , and CaO account for more than 80% of the total, and other components such as Fe ₂ O ₃ and MgO are included.

These components react with pore water or compound water in the soil to gradually produce new hydrates and pozzolanic substances such as calcium silicate hydrate (CSH) and calcium aluminate hydrate (CAH) in the long term, thereby exhibiting strength. In addition, ca. 50% higher CaO produces popliteite (Ca (OH) ₂ ) along with digestion of the pore water, and it determines the initial strength by the pottery effect. Ca2 + (CSH) and calcium aluminate hydrate (CAH) by reacting with silicate (SiO ₂ ) or aluminate (Al ₂ O ₃ ) contained in the reaction mixture. This reaction eventually results in a hydration mechanism that is essentially the same as cement without the use of cement.

If the amount of the eco-friendly fireproofing is less than 10 parts by weight based on 100 parts by weight of the above-mentioned gypsum, the strength of the composition is less than 10 parts by weight. If the amount is less than 35 parts by weight, Which is too inefficient than necessary for the passage of people and the traffic of the weasel.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described. The following examples are intended to illustrate the invention and should not be construed as limiting the scope of the invention.

Example

First, 30 parts by weight of water is added to 100 parts by weight of the soil material to 100 parts by weight of the soil material having a particle size of 40 mm or less according to the present invention and 25 parts by weight of environmentally friendly fireproofing The mixture was homogeneously mixed with a forced mixer to prepare a grass soot composition. Herein, 200 parts by weight of fine blast furnace slag, 30 parts by weight of Petroleum coke desulfurization gypsum and 30 parts by weight of calcium hydroxide (CaOH ₂ ) are contained in an amount of 50% by weight based on 100 parts by weight of the furnace desulfurization type high- By weight and 30 parts by weight of byproducts generated in the desulfurization and dephosphorization process of the steelworks were uniformly mixed.

Next, to measure the usable time of the soil composition, 10, 30, and 60 minutes of flow was measured. The compressive strength of the soil layer composition was measured at 7 days and 28 days, , And 20 cm in height to prepare six specimens. The specimens were cured in a thermo-hygrostat at a relative humidity of 90% and a temperature of 20 ° C.

Comparative Example

First, 30 parts by weight of water was added to 100 parts by weight of the above soil to a soil layer composition containing 25 parts by weight of one kind of ordinary portland cement, with respect to 100 parts by weight of a mixture of clay and rayon having a particle size of 40 mm or less, The mixture was uniformly mixed with a mixing mixer to prepare a grass soot composition.

Next, to measure the usable time of the soil composition, 10, 30, and 60 minutes of flow was measured. The compressive strength of the soil layer composition was measured at 7 days and 28 days, , And 20 cm in height to prepare six specimens. The specimens were cured in a thermo-hygrostat at a relative humidity of 90% and a temperature of 20 ° C.

Rust  Performance test methods and results

As shown in Table 1 below, the flow test was conducted by KS F 2594 and the compressive strength test was conducted by the KS F 2343 method.

Experiment Way Remarks Slump flow KS F 2594 Slump flow test method Compressive strength KS F 2343 Uniaxial Compressive Strength Test Method

(1) Change over time in the flow

10, 30, and 60 minutes after mixing were measured to determine the pot life of the soil. The results are shown in Table 2. As can be seen from Table 2, both the examples and the comparative examples showed satisfactory fluidity due to the manifestation of a sufficient flow, and the change in the flow aging was also such that both the comparative examples and the examples had sufficient fluidity .

division Flow (mm) Change over time Uniaxial compressive strength (kgf / cm ² ) 10 minutes 30 minutes 60 minutes 7 days 28th Example 630 590 360 170 275 Comparative Example 600 550 380 135 220

(2) Change in uniaxial compressive strength

Table 2 shows uniaxial compressive strengths in Examples and Comparative Examples. As can be seen from this, on the 7th day of the curing, 170 kgf / cm ^{2 of the} embodiment and 135 kgf / cm ² of the comparative example were exhibited, indicating that the environmentally friendly fireproofing according to the present invention exhibited an initial strength higher than ordinary portland cement Respectively. In addition, the strength of 28 days showed a strength of 220 kgf / cm ² for the cement, but a relatively high strength of 275 kgf / cm ^{2 for} the composition of the present invention.

Therefore, when the grass soot composition having such strength is applied, sufficient purpose can be achieved and eco-friendly construction without using portland cement at all will be possible.

Claims (6)

And 10 to 35 parts by weight of a fireproof material, based on 100 parts by weight of the soil material having a particle size of 40 mm or less,
The above-
A blast furnace slag fine powder as a latent hydraulic material,
And a petroleum gravel-type desulfurization gypsum which decomposes the oxidized film of the blast furnace slag fine powder to exhibit potential hydraulic properties of the blast furnace slag fine powder.
The method according to claim 1,
The above-
150 to 250 parts by weight of the blast furnace slag fine powder and 20 to 40 parts by weight of the Petroleum coke desulfurization gypsum are mixed with 100 parts by weight of the high calcium incineration residue generated in the on-furnace desulfurization type coal combustion incinerator having a calcium oxide (CaO) content of 20% By weight based on the total weight of the composition.
3. The method of claim 2,
Wherein the fireproofing further comprises 20 to 40 parts by weight of by-products generated in the desulfurization and de-phosphorization step of the steelworks, with respect to 100 parts by weight of the high-calcium incineration residue, wherein the calcium hydroxide (CaOH ₂ ) Composition. delete delete delete