KR102004257B1 - Construction material for reducing dust using polymer-based dust reducing agent - Google Patents

Abstract

The present invention relates to a construction material for dust reduction utilizing a polymer-based scattering dust reduction agent. In the present invention, a liquid-type polymer-based scattering dust reduction agent, composed of a polymer synthesized by a polycondensation reaction between an amine compound having a polyhydric alcohol group and a dihydric or higher alcohol, is high-speed mixed and spraying is applied to cement-based materials, lime-based materials, or dry cement mortars, thereby having a remarkable dust reduction effect while maintaining fluidity and compressive strength equal to or higher than physical performance of general cements and mortars. Therefore, the liquid-type polymer-based scattering dust reduction agent is useful as the construction material that requires improvement of construction environment in the filed, and specifically, it is possible to be provided as a solidified product or a dry cement mortar product of cement-based materials or lime-based materials for stabilization and solidification of soft ground.

Description

TECHNICAL FIELD [0001] The present invention relates to a building material for reducing dust using a polymeric fugitive dust-

The present invention relates to a building material for dust reduction using a polymeric fugitive dust reducing agent, and more particularly, to a building material for dust reduction using a polymer type fugitive dust reducing agent, Polymer dispersant dust reducing agent is applied to cementitious material, lime-based material or dry cement mortar at high speed mixing and spraying, and fluidity and compressive strength are maintained equal to or higher than physical performance of general cement and mortar, and dust reduction effect And the like.

According to the Environment Atmospheric Conservation Act of the Ministry of Environment, dust is defined as particulate matter that floats or falls down in the atmosphere. These dusts are divided into particles with a particle size of 50 μm or less depending on the particle size, such as total suspended particles (TSP) and particulate matter (PM) having a very small particle size.

Comparing the total dust (TSP) and the PM2 (PM10) emissions in each region of the country, the largest source of emission is the road packaging and construction activities.

Fine dusts can be generated from fuel combustion, automobile exhaust gas, various construction sites and civil engineering sites, and these fine dusts are also called dusts. The environmental standard for fine dusts is set at an average concentration of 50 μg / ㎥ and an annual average concentration of 25 μg / ㎥. In recent years, The average daily concentration is 35 ㎍ / ㎥, and the annual average concentration is 15 ㎍ / ㎥.

Such scattered dust is suspended in the air and blocks the sunlight, which adversely affects plant growth by inhibiting assimilation, respiration, and transpiration.

Particularly, these particles can be removed by coughing, sneezing, ciliary movement, etc., but some of them are deposited or accumulated in the alveoli and the like to be harmful to the human body Influence. Particularly, it is known that the particulate matter is more likely to be adhered to the lungs of the human body than the gaseous substance, and thus has a greater possibility of adversely affecting human health than other air pollutants.

Therefore, along with the purpose of health and safety of workers in the recent construction site, concern about scattered dust of nearby residents leads to deterioration of images of construction companies and manufacturers, and the need for improvement of the construction environment is increasing day by day.

In order to reduce scattered dust generated in various construction and civil engineering sites, it is possible to use a device for sucking and purifying dust, such as a dust collector, but the use of such a device is expensive and has a limited space, It is necessary to perform forced ventilation by using a fan using a fan. In addition, in this case, the dust that escapes to the outside must be treated separately, which may cause inconvenience and secondary contamination.

Generally, sprinkling method is used as an anti-fouling control method for unpaved roads and foreshore and nightfall. However, it is effective for suppressing dust generation, but has a disadvantage in that the duration of inhibition is short and does not completely prevent fogging dust. Further, In the case of water, it becomes hard with water over time, and secondary contamination may occur.

As an example of the scattered dust inhibitor, Patent Document 1 discloses a method of mixing magnesium chloride or calcium chloride with water as an inhibitor for suppressing scattered dust on a non-coated paper surface and spraying it several times. However, magnesium chloride or calcium chloride used as representative salts has a variety of hydrate structure. When mixed in an aqueous solution, it is ionized, and when a large amount of magnesium chloride or calcium chloride is used, salt salinity is increased. Which can interfere with plant growth and cause soil acidification and corrosion of equipment.

As another example, Patent Document 2 discloses an emulsion type in which 2 to 20% by weight of dispersoids and remaining water and other unavoidable impurities are homogeneously mixed, wherein the dispersoid is composed of 30 to 45% by weight of an acrylic polymer compound, 40 to 60% By weight of water, 8 to 20% by weight of water and 5% or less of a surfactant, and is excellent in scattering prevention and waterproofness.

In addition, Patent Document 3 reports that, as a natural coating agent for scattering prevention, even if they are mixed with minerals such as coal by using vegetable oil or animal oil, they do not generate noxious gas or cause a change in caloric value during the combustion process. However, when the vegetable oil and the animal oil are used alone, it may cause soil contamination due to the formation of the soil, and the animal stearic acid obtained from Uji, lard, fish oil, butter, etc., There is a problem that can be caused.

Patent Document 4 discloses a dispersion-scattering-preventing composition prepared by using a vinyl acetate monomer and polyvinyl alcohol, acrylic acid, a surfactant, and water as a main component. However, such a resin type is insoluble and spreads on soil particles to bind particles, It has solid solid form and suppresses dust.

In addition, known fugitive dust suppressants may be used to weaken the surface tension by using a surfactant to enable the dust particles on the surface to contain water molecules, or to contain asphalts, but it contains a polyaromatic hydrocarbon rule, There is a concern.

Patent Document 5 discloses that core particles; And a polyurethane-containing dust suppressing agent disposed around the core particles for inhibiting dust formation of the core particles, wherein a dust reduction gradient of greater than 20% and a dissolution rate of less than 30 after one day of aging at 38 < 0 & Dust inhibition aggregates with a gradient are proposed.

The present inventors have made efforts to reduce dust on building materials for improving the construction environment in road pavement and construction site. As a result, in order to suppress scattering dust of hydraulic materials such as cement, It is also possible to provide a building material which is designed to be used as a scrapping dust reducing agent and to which a liquid polymer spraying dust reducing agent is applied to a cementitious material, a lime-based material or a dry cement mortar at a high speed by mixing and spraying. The present invention has been accomplished by confirming the remarkable effect of reducing the dust while maintaining the compressive strength equal to or more than that.

Korean Patent No. 10-0494538 (Jun. 10, 2005) Korean Patent Publication No. 10-2006-0085864 (published on July 28, 2006) Korean Patent No. 10-0748156 (2007.08.10. Announcement) Korean Patent No. 10-1595654 (Announcement on Feb. 18, 2016) Korean Patent Laid-Open No. 10-2015-133004 (published on April 28, 2014)

An object of the present invention is to provide a building material for dust reduction using a polymeric fugitive dust reducing agent.

In order to achieve the above object, the present invention provides a building material for dust reduction using a polymeric fugitive dust reducing agent.

The polymeric fugitive dust reducing agent is composed of a polymer synthesized from a polycondensation reaction of an amine compound having a polyhydric alcohol group with an alcohol having a valence of two or more. Specifically, the polymer comprises an amine compound having a polyhydric alcohol group, Alcohol in a molar ratio of 1: 1 to 1: 3.

The amine compound having a polyhydric alcohol group may be any one selected from the group consisting of triethanolamine, trimethanolamine and triisopropanolamine, more preferably triethanolamine, As the bivalent or higher alcohol, diethylene glycol, 1,3-butylene glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, hexylene glycol, Tylene glycol, and glycerin.

The dust-reducing building material of the present invention preferably contains 0.01 to 10 parts by weight of the polymeric fugitive dust reducer based on 100 parts by weight of the target material selected from cementitious materials, lime-based materials or dry cement mortar, Since the scattering dust reducing agent is a liquid type, high-speed mixing and spraying can be applied, so that it can be easily applied in the field.

The dust-reducing building material of the present invention can be provided as a cement-based material or a cement mortar fire-extinguishing product or a dried cement mortar product, which is effective for stabilizing and solidifying soft ground by applying the polymeric fugitive dust reducing agent.

Provided is a dust-reducing building material applied to a cementitious material, a lime-based material or a dried cement mortar, which is obtained by a polycondensation reaction of an amine-based compound having a polyhydric alcohol group and an alcohol having two or more hydroxyl groups .

The polymeric fugitive dust-reducing agent is provided in a liquid form, is advantageous for high-speed mixing, and is sprayed on the surface of cement or mortar, so that it is easy to handle and apply in the field.

In addition, the dust-reducing building material of the present invention is a cementitious material or a lime-based material used in an improvement method of supplying a hardened material by a surface layer mixing treatment method for stabilizing and solidifying a soft ground such as a high- It can be provided as a fire product.

In addition, the dust-reducing building material of the present invention can be used in the form of a bulk and packing area (25, 40 kg, etc.) in which only cement, dry sand, various properties improvers, As a cement dry mortar product.

1 is a flow test result of mortar for each addition amount of the polymeric fugitive dust reducing agent of the present invention,
FIG. 2 shows the results of compressive strength test of the mortar for each addition amount of the polymeric fugitive dust reducing agent of the present invention,
FIG. 3 is a comparative photograph for visual evaluation of generation of dust according to the polymer containing fugitive dust reducing agent of the present invention,
4 is a device for quantitative evaluation measurement of dust reduction of the polymeric fugitive dust reducing agent of the present invention,
Fig. 5 is a result of quantitative evaluation of dust reduction effect when the polymeric fugitive dust reducing agent of the present invention is applied to cement and mortar.

Hereinafter, the present invention will be described in detail.

The present invention provides a dust-reducing building material to which a polymeric fugitive dust reducing agent is applied by a polycondensation reaction between an amine compound having a polyhydric alcohol group and an alcohol having two or more hydroxyl groups.

Specifically, the polymer is synthesized from a polycondensation reaction at a molar ratio of 1: 1 to 1: 3 between an amine compound having a polyhydric alcohol group and an alcohol having at least two diols. Confirmation of the synthesis of the polymer is carried out by GC (Gas Chromatography) The presence or absence of synthesis can be confirmed by confirming the increase in the molecular weight.

The amine compound having a polyhydric alcohol group is preferably any one selected from the group consisting of triethanolamine, trimethanolamine and triisopropanolamine. The dihydric alcohol is preferably selected from the group consisting of diethylene glycol, 1,3-butylene It is preferable to use any one selected from the group consisting of glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, hexylene glycol, octylene glycol and glycerin.

In a preferred embodiment of the present invention, triethanolamine and diethylene glycol are used to illustrate the present invention. However, any alcohol having two or more dihydric alcohols capable of polycondensation reaction with the -OH functional group of triethanolamine may be used without any particular limitation It will be possible.

In the examples of the present invention, it is possible to confirm the result of synthesis by GC in a molar ratio of 1: 1 to 1: 3 based on the molecular weight of triethanolamine of 149 and the molecular weight of ethylene glycol of 92 as a starting material. .

All of the polymers synthesized at the above-mentioned molar ratio showed a dust-reducing effect, but in a preferred embodiment of the present invention, a polymer synthesized at a molar ratio of 1: 3 of triethanolamine and ethylene glycol is used.

As shown in the above reaction formula, the polymeric fugitive dust reducing agent, which is synthesized by a reaction in which a monomer having two different functional groups forms a chain and a condensate is formed during a polycondensation reaction, As a composite, it is longer than the molecule of the conventional polymer and binds the particles in three directions, so that scattering of the particles can be effectively prevented.

The dust-reducing building material of the present invention is advantageous for high-speed mixing because the fugitive dust reducing agent obtained in the above is provided as a liquid single type of polymer, and can be sprayed on the surface of cement and mortar.

Accordingly, the dust-reducing building material of the present invention can be applied to the cement-based material, the lime-based material or the dried cement mortar at a high speed by mixing and spraying the liquid-type polymeric fly ash dust reducing agent, A remarkable dust reduction effect can be achieved while the strength is kept equal or more.

The dust-reducing building material of the present invention, which is easy to handle and apply, is a cementitious material which is used in an improvement method of supplying a cured material by a surface layer mixing treatment method for stabilizing and solidifying soft ground such as inherent substrate soil, Or as a high fire product of lime-based materials.

In addition, the dust-reducing building material of the present invention can be used in the form of a bulk and packing area (25, 40 kg, etc.) in which only cement, dry sand, various properties improvers, As a cement dry mortar product.

FIG. 1 shows the results of the flowability test of mortar according to the addition amount of the polymeric fugitive dust reducing agent in the present invention. As the addition amount of the fugitive dust reducing agent increases, the flowability of the mortar tends to increase as compared with the test group not containing the fugitive dust reducing agent It is possible to reduce the amount of the mixture during the production of the mortar and to increase the amount of the functional additive in the amount of the fugitive dust reducing agent, thereby improving the physical properties. In particular, it is possible to maximize the dust reduction effect.

FIG. 2 is a graph showing the compressive strength of the mortar according to the addition amount of the polymeric fugitive dust reducing agent of the present invention. As the amount of the fugitive dust reducing agent composed of the polymer synthesized from the reaction of triethanolamine and diethylene glycol increases, The intensity shows an increase.

Further, as shown in FIG . 3 , as a comparative photograph for visual evaluation of dust generation depending on whether or not a polymeric fugitive dust reducing agent is contained, when the amount of the fugitive dust reducing agent is added in an amount of 2.5 parts by weight, .

From the above, it is possible to determine the preferable content of the polymeric fugitive dust reducing agent in the dust-reducing building material of the present invention, specifically 0.01 to 10 parts by weight, more preferably 1 to 7 parts by weight, When sprayed at 1 to 5 parts by weight, the remarkable effect of reducing the scattering dust can be achieved while maintaining the physical performance of general cement and mortar.

FIG. 4 and FIG. 5 are apparatus for quantitative evaluation of dust reduction effect when the fugitive dust reducing agent of the present invention is applied to cement and mortar. The results are shown in FIG. 4, wherein the addition amount of the fugitive dust reducing agent of the present invention The amount of fugitive dust in cement and mortar can be quantitatively confirmed as the fugitive dust reducing agent is added. In particular, when the amount of fugitive dust reducing agent is increased, the amount of fugitive dust is reduced to 40 to 50 CPM You can see the results.

Hereinafter, the present invention will be described in more detail with reference to Examples.

The present invention is intended to more specifically illustrate the present invention, and the scope of the present invention is not limited to these embodiments.

Example 1 Preparation of Polymeric Fugitive Dust Reducing Agent

The polymer was synthesized by polycondensation reaction of triethanolamine and diethylene glycol at a molar ratio of 1: 3, and the polymeric fugitive dust reducing agent made of the polymer was sprayed onto the cement. At this time, an increase in molecular weight was confirmed using GC (Gas Chromatography), and the presence or absence of synthesis was confirmed.

≪ Comparative Example 1 &

The procedure of Example 1 was repeated, except that triethanolamine was sprayed instead of the polymeric fugitive dust-reducing agent of Example 1 above.

≪ Comparative Example 2 &

The procedure of Example 1 was repeated, except that diethylene glycol was sprayed instead of the polymeric fugitive dust reducer of Example 1 above.

≪ Experimental Example 1 > Physical performance evaluation of mortar according to addition amount of polymeric fugitive dust reducing agent

The cement mortar (cement and ISO standard sand ratio of 1: 3, the amount of mixed water: W / C = 0.5) 100 (the ratio of cement mortar to ISO standard sand ratio was 100) was prepared from the polymer prepared from the reaction of triethanolamine and diethylene glycol in Example 1 0 parts by weight, 2.5 parts by weight, 5 parts by weight, 7.5 parts by weight, and 10 parts by weight were added to each other in an amount different from that of each other, and the physical properties were evaluated.

1) Evaluation of impact flow experiment

The cement mortar containing the non-acid dust reducing agent composed of the polymer synthesized from the triethanolamine and diethylene glycol prepared in Example 1 was put into a flow mold with a thickness of 2.5 cm and layered. The layer was chopped 20 times with a compaction rod, , The flow was measured by dropping 25 times for 15 seconds, and the flowability of the cement mortar can be confirmed by the flow result of the cement mortar.

1 shows the result of the flowability test of the mortar according to the addition amount of the polymeric fugitive dust reducing agent. From the results shown in FIG. 1, depending on the added amount of the fugitive dust reducing agent composed of the polymer synthesized from triethanolamine and diethylene glycol, The results showed that the striking flow was improved more than the test group without the reducing agent.

Since the improvement of the blowing flow means improvement of the flowability of the mortar, it is possible to reduce the amount of the mixture in the production of the mortar and to increase the amount of the functional additive in the scattering dust reducing agent, have.

2) Evaluation of compressive strength test

A sample prepared by mixing each additive amount of a non-acid dust reducing agent composed of a polymer synthesized from the reaction of triethanolamine and diethylene glycol in Example 1 was subjected to measurement of compressive strength after 1 day, 3 days, 7 days, and 28 days Respectively.

2 shows the results of the compression strength test of the mortar for each addition amount of the polymeric fugitive dust reducing agent of the present invention. From the results shown in FIG. 2, it can be seen from the results of FIG. 2 that a fugitive dust reducer composed of a polymer synthesized from the reaction of triethanolamine and diethylene glycol The compressive strength increased with age. Specifically, when the addition amount is 2 to 7 parts by weight, the compressive strength tends to increase with age, and when 10 parts by weight is added, It is predicted that the compressive strength of the cement will be equal to or higher than that of the general cement without added dust reducing agent.

<Experimental Example 2> Evaluation of dust reduction effect

1) Visual evaluation

FIG. 3 is a comparative photograph of the dust generation according to the fugitive dust reducing agent of the present invention. As shown in FIG. 3, 0 parts by weight and 2.5 parts by weight of the fugitive dust reducing agent composed of the polymer synthesized in Example 1, After mixing the combined samples mechanically, 100 g of the sample was temporarily dropped at a height of 59 cm, and the occurrence of dust was visually observed.

As a result of comparison with the result of dust generation of the test group added with 0 parts by weight of the scattering dust reducing agent (general cement without scattering dust reducing agent treatment), the test group added with 2.5 parts by weight of the scattering dust reducing agent showed remarkable scattering reduction degree I could confirm it with the naked eye.

2) Quantitative evaluation

For the quantitative evaluation of dust reduction, the polymers synthesized in Example 1 were mixed in amounts of 0 part by weight, 2.5 parts by weight, 5 parts by weight, 7.5 parts by weight and 10 parts by weight, respectively, in different amounts in cement and mortar The samples were mechanically mixed.

FIG. 4 is a device for measuring quantitative evaluation of dust reduction of the fugitive dust reducing agent of the present invention. After the mixing, 200 g of the sample was temporarily dropped at a height of 59 cm from the sample inlet of the acrylic tube, (KANOMAX, MODEL 3443) installed at a height above a certain level.

FIG. 5 is a result of quantitative evaluation of the dust reduction effect when the fugitive dust reducing agent of the present invention is applied to cement and mortar. As the amount of fugitive dust reducing agent is increased, scattering dust of cement and mortar is remarkably reduced .

In particular, when the addition amount of the fugitive dust reducing agent is 2.5 parts by weight, the amount of the fugitive dust reducing agent is 6.7% and 4.8%, respectively, as compared with that of the general cement containing no fugitive dust reducing agent. Air level of 40 to 50 CPM.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Claims (8)

An amine compound having any one of polyhydric alcohol groups selected from the group consisting of triethanolamine, trimethanolamine and triisopropanolamine;
Diethylene glycol, 1,3-butylene glycol, ethylene glycol, trimethylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, hexylene glycol, octylene glycol and glycerin A polymer synthesized from a polycondensation reaction of any one of divalent alcohols with an end-group of three functional groups in an -OH functional group,
A dust-reducing building material to which a polymeric fugacious dust reducing agent having a polycondensation of an amine compound having a polyhydric alcohol group and an alcohol having two or more hydroxyl groups at a molar ratio of 1: 1 to 1: 3 is applied. The polymeric fugitive dust reducing agent according to claim 1, wherein the polymeric fugitive dust reducing agent is a liquid type liquid containing 0.01 to 10 parts by weight of the polymeric fugitive dust reducing agent per 100 parts by weight of the target base material selected from the cementitious material, the lime- It is a building material for dust reduction feature. delete delete delete delete The building material for dust reduction according to claim 1, which is provided as a cementitious material or a fire-retardant product of a lime-based material effective to stabilize and solidify a soft ground by applying the polymeric arsenic dust reducing agent. The building material for dust reduction according to claim 1, wherein the polymeric fugitive dust reducing agent is applied as a dry cement mortar product.

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