KR101887152B1 - Methods for Prevention of deterioration of concrete and coloring pavement using Penetrating Nano-coat and oil type coloring agents - Google Patents

Abstract

The present invention relates to a method to prevent deterioration of concrete and perform coloring pavement using penetrative nano-coat and an oil type coloring agent, which colors a surface of concrete. According to the present invention, the method comprises: a bottom surface arrangement step of arranging a surface of deteriorated concrete exposed to the outside; a penetrative nano-coat spray step of spraying penetrative nano-coat on the deteriorated concrete exposed to the outside by using a spray apparatus after the bottom surface arrangement step, wherein a B agent including water are mixed with an A agent by 1 : 6 to 9 based on a weight ratio to disperse the A agent such that the A and B agents are uniformly mixed; and an oil type coloring agent spray step.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for preventing deterioration of concrete by using an infiltration type nano-coat and an oil type coloring agent,

The present invention promotes the reactivity of silane through the dispersion of silane while being environmentally friendly because it uses little VOC (Volatile Organic Compounds), thereby improving the waterproof, method, water repellency, And an oil-based coloring agent of an ethanol-type and an acetone-type oil-based ink type having a specific gravity lower than that of water (0.90 or less) is used to prevent the concrete from being damaged by the concrete surface The present invention relates to a method for preventing deterioration of concrete and a coloring and packaging method using an oil-based coloring agent.

Generally, concrete is known to have a durability of 50 years, but deterioration due to physical and chemical environmental conditions is inevitably caused by massive maintenance or rework, resulting in a great economic loss.

That is, due to the increase of industrialization, the traffic volume is rapidly increased, and the concrete road is worn out. In the marine environment, it is eroded by the chemical action of chlorine ion and sulfate ion in seawater and seawater for a long time. , The rate of neutralization of concrete due to calcium chloride, acid rain, snow, etc., which are rooted in the winter season, is rapidly increasing.

When the concrete is neutralized, the reinforcing bars inside the concrete are corroded, and when the reinforcing bars are corroded, the volume expands, cracking and peeling of the concrete occurs, and in the worst case, it causes collapse.

Therefore, in order to prevent salting and neutralization, a method of applying or infiltrating an epoxy-based, cement-based, silane-based silane and siloxane on the concrete surface has been developed and used.

Alkylalkoxysilanes are compounds generally represented by the chemical structure R _n Si (OR ') _4-n produced by alkoxylation of chlorosilanes.

In the above formula, the R group is a hydrophobic hydrocarbon group, typically a methyl group, a phenol group, or the like. OR 'is a hydrolyzable alkoxy group, which is hydrolyzed by water, moisture in the air, and moisture adsorbed on the surface of the inorganic material to produce silanol (Si-OH). The silanol forms siloxane (Si-OM) with the inorganic material surface (M-OH) and bonds with the inorganic material to form metal oxide, so that the surface of the concrete pore or capillary is silanized, Thereby blocking air infiltration.

In order to use alkylalkoxysilane as water repellent for concrete and brick, waterproofing agent, it is ideal to make solution or dispersion.

However, it is very difficult to make the alkylalkoxysilane exist in a stable dispersion state in a solution because the alkyl alkoxysilane is highly hydrolyzable and easily undergoes a continuous condensation reaction. As a method for solving this problem, a method of hydrolyzing a hydrolyzable silicon compound such as alkylalkoxysilane by using a surfactant has been reported.

However, this method has a problem in that a relatively large amount of nonionic emulsifier must be used in order to prepare a stable emulsion. The nonionic emulsifier is an emulsifier capable of stably dispersing the alkylalkoxysilane in water. However, if the emulsifier is added in a large amount in order to stabilize the emulsion composition after drying, Durability and water repellency are deteriorated.

Korean Patent No. 10-0581379 (hereinafter referred to as Patent Document 1) has been proposed to solve the above problems.

In Patent Document 1,

i) adding 20 to 30 parts by weight of colloidal silica containing sodium salt to 70 to 80 parts by weight of alkylalkoxysilane and reacting;

ii) adding 90 to 120 parts by weight of water to 100 parts by weight of the reaction solution of step i) and reacting; And

iii) 120 to 140 parts by weight of a solvent obtained by mixing 4: 1 of any one of butyl cellosolve or ethyl cellosolve with N-butanol or isopropanol is added to the reaction solution of step ii) The addition of an emulsifying agent does not require a step for adding an emulsifier. Thus, it is possible to prevent the deterioration of the water repellency due to the increase in the hydrophilicity of the surface of the substrate.

(Patent Document 1) KR10-0581379 B1 Method for producing a composition for preventing waterproofing, corrosion, flame resistance and neutralization of concrete

However, in the above-described Patent Document 1, water is contained in order to water-soluble alkylalkoxysilane. Since silane reacts with water, a large amount of alcohol is used as a solvent in order to prevent this. 1 'because the contents of' common '

The word is not appropriate and has not been modified.)

Since the composition contains a large amount of solvent regulated by volatile organic compounds (VOC), it is not only environmentally friendly but also limited in construction.

In order to solve the above-mentioned problems, the method for preventing deterioration of concrete and coloring pavement using the penetration type nano-coat and the oil type coloring agent according to the present invention penetrates into the pores of the exposed concrete or the surface of the capillary, , The water-repellent nano-coat does not use a volatile organic compound, so it is eco-friendly and promotes the reactivity of silane through dispersion of water-based silane to improve the waterproofing, water repellency, It is an object of the present invention to provide a method for prevention of deterioration of concrete and a coloring and packaging method using an infiltrating nano-coat and an oil-type coloring agent, which can prevent the concrete from being broken by melting and prevent the deterioration of concrete exposed to the outside, .

It is still another object of the present invention to provide an ink-jet printing ink composition which is colored on the surface of an impregnated nano-coat using an ink-jet type colorant of ethanol / acetone-based oil type ink having a specific gravity lower than that of water, Since the oil-based coloring agent is colored on the surface of the penetration type nano-coat penetrating the surface of the pore or capillary, the water vapor permeability of the concrete exposed to the outside is not formed, Thereby preventing the deterioration of the concrete exposed to the outside, and coloring a certain color on the surface of the concrete.

The present invention relates to a method of spraying (spraying) an impregnated nano-coat containing a very small amount of an alcoholic solvent except silane to a concrete exposed to the outside, in order to improve the dispersibility of the silane, Water and water resistance of the exposed concrete, prevent concrete damage caused by freezing / thawing, increase the surface peeling resistance, and prevent the concrete exposed to the outside Can be prevented from deteriorating.

In addition, an infiltrating colorant of the ethanol and acetone-based ink type, which has a specific gravity lower than that of water, can be colored in the concrete to which the penetrating nano-coat is applied. The penetration type nano-coat penetrated into the pores or capillary surface of the concrete exposed to the outside Since the layer having a different thickness for coloring is not formed due to penetration into the surface, the ventilation of the concrete exposed to the outside is maintained, so that the colored portion is not lifted due to evaporation of water vapor, It is a useful invention to prevent deterioration of concrete and to color a certain color on the concrete surface.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing the procedure of preventing deterioration and coloring of concrete exposed to the outside according to the present invention; FIG.
2 is an exploded view showing a first embodiment of a spraying apparatus according to the present invention.
3 is a perspective view showing a second embodiment of a spraying apparatus according to the present invention.
4 is a side view showing a third embodiment of a spraying apparatus according to the present invention.
FIG. 5 is a state diagram showing a state in which the mixing amount of the penetrating nanocote is controlled using the spraying apparatus of the present invention. FIG.
6 is a photograph showing a process of testing compressive strength of a specimen in the present invention.
FIG. 7 is a graph showing the compressive strength of air for a period of 28 days in the present invention. FIG.
8 is a photograph showing a state in which a test specimen is cut in the present invention.
Fig. 9 is a conceptual view of the resistance test of the chlorine ion penetration test in the present invention. Fig.
10 is a photograph showing a state in which a specimen is cut using a UTM apparatus to measure the depth of penetration of chlorine ions in the present invention.
11 is a state view showing a state in which the penetration depth of chlorine ions is measured in FIG.
FIG. 12 is a graph showing the amount of passing charges for each test type. FIG.
Fig. 13 is a photograph of the depth measurement of the penetration depth of chlorine ion.
14 is a photograph showing penetration depth of the penetrating nanocote.
15 is a photograph showing an example of visual observation of the surface in the surface peel test.
16 is a view showing a test specimen model for the surface peel test in the present invention.
17 is a graph showing a weight loss rate (%) due to the surface peeling phenomenon.
18 is a photograph showing a state in which a specimen is immersed for evaluation of water absorption resistance.
19 is a photograph showing a specimen treated with a nano-coat on a concrete in which cracks have occurred.
20 is a photograph showing a state in which a water droplet penetrates into a crack of a specimen shown in Fig. 19;
21 is a photograph of a general specimen evaluated in the air for water absorption resistance.
FIG. 22 is a photograph of the moisture absorption resistance of the nano-coated application specimen. FIG.
23 is a photograph for an environmentally friendly test.

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

The present invention relates to a method of manufacturing a concrete structure, comprising the steps of: laying out a surface of a concrete exposed to deteriorated exterior; applying a mixture of 96.5 to 98.5 wt% of alkoxysilane, 0.8 to 2.2 wt% of isopropanol, % Of water and 0.5 to 1.5 wt.% Of methanol are mixed in a ratio of 1: 6 to 9, and the water-dispersed nano-coat is prepared by mixing the water-dispersible nano- Wherein the spraying step comprises spraying an impregnated nano-coat spraying step of spraying the deteriorated exposed exterior surface of the concrete using 30-40 wt% ethyl alcohol, 30-40 wt% 1-methoxy-2-propanol, 5-10 wt% isopropanol, An oil type coloring agent spraying step of spraying an oil type coloring agent comprising 10 to 15% by weight of a resin and 5 to 10% by weight of a pigment or a dye.

One. Base plane  Cleanup phase

In the present invention, the surface preparation step is to remove impurities on the surface of the exposed concrete, to clean the surface of the concrete to be exposed to high pressure, to sandblast or short-blast to ensure penetration of the penetration type nano-coat, The removed part can be repaired using the repair material. Even if the part is broken, this step can be completed by performing repair using the repair material and then drying the exposed concrete.

2. Infiltration type  Nanocote spray (spray) step

This step is a step for spraying the penetrating nanocote onto the exposed concrete so that the penetrating nanocot can penetrate the surface of the pore or capillary.

The penetration type nano-coat used in the step of spraying the nano-impregnated nano-coat is composed of 96.5 to 98.5% by weight of alkoxysilane, 0.8 to 2.2% by weight of isopropanol and 0.5 to 1.5% by weight of methanol, 9 weight ratio, and the mixture of the B agent and the A agent was uniformly dispersed in the moving tube by vortexing.

Herein, the alkoxysilane constituting the agent A is a compound represented by the chemical structure of R _n Si (OR ') _{4 -n} produced by alkoxylation of chlorosilane, wherein the R group is a hydrophobic hydrocarbon group, , Phenol group and the like. OR 'is a hydrolyzable alkoxy group, which is hydrolyzed by water, moisture in the air, and moisture adsorbed on the surface of the inorganic material to produce silanol (Si-OH).

The silanol forms siloxane (Si-OM) with the inorganic material surface (M-OH) and bonds with the inorganic material to form metal oxide, so that the surface of the concrete pore or capillary is silanized, Thereby functioning to block air infiltration.

That is, the alkoxysilane has a property of pushing off the rehydrated chloride as a compound particularly useful for bonding an inorganic substance and an organic substance component by covalent bonding of a silicon atom and a hydrogen atom.

The alkoxysilane penetrates into the pores of the exposed concrete or the surface of the capillary to be hydrolyzed and condensed with the silicate structure of the exposed concrete.

That is, when moisture is contained in the alcoholic silane molecules during the hydrolysis, unstable silanol molecules are formed. This silanol is bonded to the hydroxyl group of the silicate structure in the exposed concrete during the condensation reaction Cross coupling occurs.

Therefore, the unstable silanol molecule corresponding to the hydrocarbon group having the property of pushing out water and chloride is chemically bonded to the hydroxyl group in the silicate molecular structure of the exposed concrete, and the concrete exposed to the outside where the alkoxysilane is permeated, And chloride can be hydrophobic.

On the other hand, methanol is used as a solvent for the alkoxysilane.

And, isopropanol is intended to act as a surfactant to reduce interfacial tension between alkoxysilane, which is a hydrophobic aromatic compound, and methanol, which is a hydrophilic substance, and physically mix with each other.

Methanol as a solvent for dissolving the alkoxysilane and isopropanol used as a surfactant are not completely dissolved in the alkoxysilane but are contained in such an amount as to cause flowability. When they are mixed below the critical value, the alkoxysilane The flowability is lowered and the workability is lowered. When the critical value is exceeded, the effect of improving the flowability is improved, but the content of the volatile organic compound as the regulated material is increased, There arises a problem that the worksite and its surroundings are hindered.

On the other hand, the agent A composed of the above components is mixed with the agent B and sprayed. At this time, the mixed amount of the agent A and the agent B of the penetrating nanocote is mixed in a ratio of 1: 6-9.

When the mixing amount of the B-component is less than the critical value, it is difficult to expect high reactivity, and when the mixing amount exceeds the threshold value, the hydrophobicity is lowered.

The mixing and spraying of the penetration type nano-coat is used for concrete exposed to the outside through the spraying equipment 10, 20 and 30, and depending on the size of the exposed concrete exposed to the outside, The spray bar 20 in which the wheels 21 and the plurality of nozzles 22 are formed as in the gun 10 or the vehicle 3 as shown in Fig. 3 or the infiltration nano-coat is applied to the vehicle 31 as in Fig. 4 Spraying operation of the infiltrating nano-coat can be performed using any one of the tank 32 for storing air and the spraying vehicle 30 having the plurality of nozzles 33 formed therein.

In particular, as shown in FIG. 5, the spraying apparatuses 10, 20, and 30 have the B supply pipes 16, 26, and 36 through which a predetermined amount of water can be moved, 25 and 35 are formed at any one position of the supply pipes 15, 16, 26 and 36 so that the B supply pipes 15, 25, and 35 into the B supply pipes 16, 26, and 36 at a rate lower than the moving speed of the B product.

The A agent flowing into the B supply pipes 16, 26 and 36 of the spraying apparatuses 10, 20 and 30 is dispersed by the B agent, that is, not in a single lump but in a finely sheared state, And the surface of the exposed concrete is sprayed.

Here, the alkoxysilane included in the agent A starts cross-linking in the process of mixing with water, or reacts with itself to form a silicone polymer.

In addition, the alkoxysilane is hydrolyzed at the chemical reaction terminal which cross-links with the silica constituting the concrete exposed to the outside. As described above, the alkoxysilane is sheared and dispersed through the B- , The chemical reactivity proceeds more rapidly, so that a more immediate and intense hydrophobic effect is instantly generated and the effect of increasing the reflection can be obtained.

The flow control tips 17, 27 and 37 for controlling the inflow amount of the agent A are coupled to the A supply pipes 15, 25 and 35 so that the flow control tips 17, 27 and 37 So that the user can control the flow rate desired by the user.

Such an infiltrating nano-coat spraying step can be completely dried within about one to two hours after the spraying of the infiltrating nano-coat to complete the construction.

3. Oil type coloring agent spraying step

Meanwhile, the present invention may further include an oil coloring agent spraying step for imparting color to the surface of the concrete exposed to the outside by spraying the penetration nano-coat.

The oil type coloring agent in the present invention is a colorant comprising 30 to 40% by weight of ethyl alcohol, 30 to 40% by weight of 1-methoxy-2-propanol, 5 to 10% by weight of isopropanol, 10 to 15% by weight of condensation resin, Lt; / RTI >

Such an oil type colorant contains alcohols having a specific gravity lower than that of water as a solvent, so that it is in a state of being infiltrated into the surface of the hydrophobic high-permeability nano-coat that permeates the surface of the pores or capillary of the concrete exposed to the outside.

In addition, typical dyes or pigments have a particle size of 6 to 25 탆, which is smaller than the size of the pores of concrete exposed to the outside, which is smaller than 60 to 250 탆. As a result, The colorant penetrates into the surface of the penetrated nano-coat of the exposed concrete, and the solvent is volatilized by the volatilization, so that only the dye or pigment remains on the surface of the penetrating nano-coat.

Therefore, not only the form of a layer having a separate thickness on the surface of the exposed concrete but also the permeability of the exposed concrete is maintained because the dye or the pigment is kept in the pores of the exposed surface of the concrete So that the deterioration of the concrete exposed to the outside can be prevented and the effect of the lifting of the coloring agent caused by the pressure of water vapor generated in the concrete exposed to the outside can be obtained.

[ Experiment ]

end. Specification  making

The maximum size of coarse aggregate used in the formulation was 25 mm, and Table 1 shows the selected mixing ratio. The unit cement amount was fixed to 200 kg / m 3 and 280 kg / m 3 considering the design strength. Because of the low amount of cement, AE water reducing agent was used at 2%, which is the maximum allowable amount, to ensure minimum workability and durability.

Concrete mixing ratio Cement 200㎏ / ㎥ Gmax
(Mm) lump
(Mm) Air
(%) W / C
(%) S / a
(%) Unit Weight (kg / m3) Admixure W C S G AE-Reducing Agent 25 8 6 65 42 130 200 826 1160 C x 2% Cement 280㎏ / ㎥ Gmax
(Mm) lump
(Mm) Air
(%) W / C
(%) S / a
(%) Unit Weight (kg / m3) Admixure W C S G AE-Reducing Agent 25 8 6 50 42 140 280 786 1105 C x 2%

Three specimens of Ø100 × 200㎜ specimens were prepared for each type of mixture for comparison with the design strength of the mixture satisfying the required characteristics and the compressive strength was confirmed at 28 days of age. (See Fig. 6)

The measured 28-day compressive strength was 21 MPa and 25 MPa on average as shown in FIG. 7, and it was confirmed that the compressive strength almost matched the initial design strength.

I. Chloride ion penetration resistance and depth evaluation

 1) Chloride ion penetration test method (KS F 2711)

The permeability criterion of chloride ion according to the amount of charge of concrete in chloride ion penetration resistance test is defined as [Table 2].

Chloride ion permeability according to charge amount Pass charge (C) Chloride ion permeability > 4,000 height 2,000 ~ 4,000 usually 1,000 to 2,000 lowness 100-1,000 Very low <100 Negligible

* Curing condition is 28 days, and the lower the amount of passing charge, the better.

In order to increase the reliability of the test specimens used for the test, the middle portion of the specimen of Ø100 × 200 mm was cut to a thickness of 5 cm as shown in FIG. 8, and three specimens were produced according to the mixing conditions of the penetration type nano- And the test was carried out.

The test was carried out according to the standard of KS F 2711 as shown in the conceptual diagram of FIG. 9, and the test solution was prepared by adding sodium chloride solution with sodium chloride of reagent grade of 3.0% to distilled water and 0.3N sodium hydroxide solution.

The voltage of the test equipment was supplied with a voltage of 60 V to accelerate the penetration of chlorine ions, and the resistance change for 6 hours was measured at intervals of 30 minutes. The test equipments are as shown in Fig. 15, and three specimens of each type are applied to 12 specimens of 0.3M NaOH solution and 3% NaCl solution respectively. The test was performed.

To confirm the depth of penetration of chlorine ions after the test, the specimens were cut using the UTM equipment as shown in Fig. 10, and a silver nitrate solution was sprayed on the surfaces of the specimens thus cut, ], The penetration depth was confirmed by observing with Vernier calipers. The measurement results are shown in Table 3 below.

Result of chlorine ion penetration resistance test division Cement 200㎏ / ㎥ Cement 280㎏ / ㎥ One 2 3 One 2 3
Nano coat
not used Modified
Charge amount (C) 1,350 1,197 1,260 990 1,044 1,008 Penetration depth
(Mm) 13.7 16.7 17.2 12 19.5 13.2
Nano coat
Used Modified
Charge amount (C) 0 0 81.22 32.49 0 0 Penetration depth
(Mm) 0 0 0 0 0 0

In general concrete specimens without penetration nano-coat, the amount of modified charge (C) was low (1,000 ~ 2,000C) compared to the previous reference table, regardless of the amount of cement. In the concrete specimens subjected to the surface reinforcement by application, the amount of quartz charge was negligibly measured (<100C), confirming the effect of enhancing the penetration resistance of the penetrating nanocote.

As a result of measurement of penetration depth after measurement of passing charge, general concrete showed penetration depth of about 1.5 cm or more as shown in [Fig. 13] due to reaction with silver nitrate. However, according to the application of the penetration type nanocote, the penetration depth of the chlorine ion was not visually measurable, and only the penetration depth (about 5 to 7 mm) of the penetration type nanocote was measurable as shown in FIG. Therefore, penetration of chlorine ions hardly occurs according to the application of the penetration type nano - coat. It is considered that the penetration nano - coat applied to the concrete pavement protects the concrete from the external salt and improves the resistance.

All. Surface peeling  Resistance evaluation

After spraying on the pavement surface in the winter season, the residual snow remover (CaCl) is subjected to complex deterioration due to freeze-thaw phenomenon and chemical reaction caused by the day-to-day effects of night and day. And the durability and the commonality of road pavement are lowered. Therefore, in the present invention, the test was conducted to confirm the effect of improving the resistance to surface peeling according to the application of the penetration type nano-coat.

In the present invention, experiments were conducted in accordance with ASTM C 672, and specimens of each type were prepared in order to compare the surface delamination resistance of new and old concrete. As shown in FIG. 15, Respectively.

Specimen Type and Quantity
division New concrete Old concrete Nano coat
Unapplied Nano coat
apply Nano coat
Unapplied Nano coat
apply Cement
(Kg / m3) 200 One One One One 280 One One One One

For the test, a 20 mm high acrylic plate was prepared on the surface portion of a 100 × 300 × 300 mm specimen prepared as shown in FIG. 16 to maintain the level and even distribution of the test solution (4% CaCl 2 solution). The test cycle consisted of a total of 50 cycles of 17 hours of freezing and 7 hours of melting of 1 cycle (24 hours). The surface condition of specimens was measured at 5, 10, 15, 25, . The amount of exfoliation occurred during the test was calculated by comparing the initial specimen weight with the weight loss rate (%) of the specimen.

Visual observation of surface (ASTM C 672) division Surface Condition 0 no scaling One very slight scaling (3mm depth max no coarse aggregate visible) 2 slight to moderate scaling 3 moderate scaling (some coarse aggregate visible) 4 moderate to severe scaling 5 severe scaling (coarse aggregate visible over entire surface)

The aged concrete specimens were subjected to 10 to 15 cycles in advance to simulate the deterioration and induced early deterioration, and then the penetration type nano - coat was applied. At this time, a prior surface treatment was applied through a grinder to apply the penetrating nanocot for one type.

As a result of the evaluation of the newly developed concrete for the purpose of confirming the surface deterioration by the snow remover, the new concrete without the penetration type nano-coat showed detachment due to the deterioration from the early point, A large amount of peeling occurred in most of the surface area. As a result, it is classified as 'Moderate to severe scaling (4)' and 'Moderate scaling (3)' according to the evaluation criteria.

However, in the early stage of curing of new concrete, when surface strengthening was carried out through deterioration control, there was almost no surface separation phenomenon in all specimens irrespective of the amount of cement and classified as 'No scaling (0)' by visual evaluation criteria . It was confirmed that a very small amount of weight loss rate occurred at a good surface condition and the weight of the initial specimen after the end of the experiment. Thus, it was confirmed that the excellent effect of improving the surface peeling resistance was obtained.

The graph shown in FIG. 17 shows the loss ratio (%) of the initial weight of the initial specimen by measuring the peel weight during the test in addition to the surface visual evaluation.

The highest loss rate was observed in the new concrete without the penetration type nano - coat, and the loss ratio was hardly occurred when the penetration type nano - coat was applied to the new concrete. Since aged concrete is a specimen whose durability is weakened by inducing a certain degree of deterioration, more amount of exfoliation is generated than in the case of using a penetration type nano-coat in a new concrete, but the surface treatment through grinding and application of a penetration nano- The weight loss rate can be reduced considerably.

la. Evaluation of water absorption resistance and freezing / thawing

Experiments were carried out to compare the absorption ratios of water (water) penetrating into concrete. The untreated specimen shows a grayish color due to moisture absorption within 1 to 5 minutes after immersion, and the specimen to which the penetrating nanocot is applied as shown in [Figure 18] Of the total population.

Results of water absorption measurement
division
General specimen Nanocote treatment specimen
Water absorption
weight
Absorption weight
Absorption Absorption rate Absorption rate Dry weight 556.4g 558.2 Soak 2 hours
571.5 g
15.1 g 559.1
0.90 g 94.41%
2.71% 0.16%

In addition, referring to the water absorption amount in [Table 6], in the case of the general specimen not using the nanocote, 15.1 g of water was absorbed after 2 hours of immersion, whereas in the case of the specimen treated with the permeable nanocote, After a lapse of time, it absorbed only 0.90 g of water, indicating a reduction of 94.41%.

Further, even in the case of a specimen treated with a nano coat on a specimen in which cracking occurs as in [Fig. 19], the effect of blocking water absorption as in Fig. 20 can be confirmed.

These results show that water is not introduced into the concrete exposed to the outside, and therefore, the water absorption in the exposed concrete improves the deterioration prevention effect of the concrete caused by freezing / thawing.

hemp. Evaluation of water absorption resistance atmospheric

The amount of water absorption in the specimens treated with the general specimen and the penetrating nanocote was compared. As shown in FIG. 21, when the moisture meter was connected to a general specimen not treated with nano-coat, it was found that the humidity of "19.2%" was detected, while the nano-coat was treated "0%" was set for the specimen.

Therefore, as shown in the above experimental results, the specimens treated with the penetrating nanocot have been shown to prevent moisture absorption in the atmosphere.

bar. Eco-friendliness test

After 24 hours of penetration type nano - coat was applied to the concrete, a visual test was conducted to confirm whether the infiltrated nano - coat was eluted into water and posed a risk to crops or water quality. As shown in FIG. 23, it was confirmed that the tropical fish were alive without any problem. As a result, it can be seen that there is no problem after reacting with the penetration type nanocote concrete.

10: Spraying equipment
15: A supply pipe 16: B supply pipe 17: flow control tip
20: Spraying equipment
21: Wheel 22: Nozzle
25: A supply pipe 26: B supply pipe 27: flow control tip
30: Spraying equipment
31: vehicle 32: tank 33: nozzle 35: A supply pipe 36: B supply pipe
37: Flow control tips

Claims (3)

A ground surface cleaning step of cleaning the surface of the exposed concrete;
The surface of the concrete exposed to the outside deteriorated after the surface preparation step was coated with a mixture of A: water and B: water consisting of 96.5 to 98.5% by weight of alkoxysilane, 0.8 to 2.2% by weight of isopropanol and 0.5 to 1.5% To 9 wt% ratio, so as to disperse the A and B particles while dispersing the A agent, and to store the permeation nano-coat in the spray bar or the spray bar having the wheel and the plurality of nozzles or the infiltration nano-coat in the vehicle An atomizing nano-coat spraying step of spraying a surface of a concrete exposed to the outside, which is deteriorated by using any one of spraying equipment selected from among a plurality of spraying equipment and a spraying vehicle having a plurality of nozzles formed therein;
An oil type coloring agent composed of 30 to 40% by weight of ethyl alcohol, 30 to 40% by weight of 1-methoxy-2-propanol, 5 to 10% by weight of isopropanol, 10 to 15% by weight of condensation resin, and 5 to 10% Spraying an oil-based coloring agent spraying step, wherein the deterioration-preventing and coloring-packing method of concrete using an infiltrating nano-coat and oil-type coloring agent is characterized.
delete The method according to claim 1, wherein the mixing amount of the agent A and the agent B is controlled through a spraying device for spraying the infiltrating nanocote in the infiltrating nano-coat spraying step to adjust the flow rate of the agent A to the supply line A Preventing deterioration and coloring of concrete using infiltration nano-coats and oil-based colorants, characterized by mixing the flow control tips of various diameters and controlling the mixing amount.

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