KR101683021B1 - Crystalline growth type concrete powdered water proofing agent with an improved self-healing function and method thereof - Google Patents

Abstract

The present invention relates to a crystalline growth-type concrete-mixing powdered spherical waterproof agent having an improved autonomous healing function. After cement, silica, crystalline quartz, and cryptocrystalline quartz are combined, quartz, talc, and zinc stearate which are heated at a high temperature are mixed. According to the present invention, when cracks occurs in concrete, penetrated water and particles of cement are reacted to produce a deformed calcium silicate hydrate and fill cracks. Moreover, a composite catalyst generated when being reacted with water is promoted to continuously produce a deformed calcium silicate hydrate, so autonomous healing can be permanently ensured when cracks occur in concrete and strength of concrete is improved. Moreover, crystalline quartz is more combined than cryptocrystalline quartz, and heating is performed at a temperature increasing speed of 15-25C/min. Then, clacining is performed, so a waterproof agent having more excellent strength and anticorrosion can be produced. In addition, talc and zinc stearate are mixed to control coagulation of powder and to ensure uniform dispersibility. At the same time, storage properties are very excellent, and a slump maintaining function of combined concrete is not affected.

Description

Technical Field [0001] The present invention relates to a powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function and a method for producing the same,

The present invention relates to a powder type concrete waterproofing agent for admixing a crystal growth type concrete having improved self-healing function, and more particularly, to a concrete type waterproofing agent for water-tight concrete which is mixed with concrete laid on the floor, rooftop, wall, The present invention relates to a powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function capable of self-healing a leakage by closing cracks through activation and growth of crystals when concrete cracks occur.

Since most of the concrete used in construction structures is a hydration hardened material, pore generation by evaporation of residual water is inevitable. Penetration of external harmful substances through this result in deterioration of performance and durability of materials, It is strong, but has weak properties in the tensile strength. Because cracks are intrinsic properties of concrete, cracks in reinforced concrete structures are not considered to be fractures, but the width of the cracks should not exceed the designed width limits. In addition to these cracks, microcracks usually occur in concrete due to shrinkage deformation and can not be prevented. The formation of a continuous network of microcracks greatly affects the waterproofness of the concrete. Especially, when water penetrates through the cracks of the concrete, it accelerates the corrosion and neutralization of the reinforcing steel, which has a great influence on the life of the building.

Currently, domestic buildings do not have sufficient external space, so it is difficult to waterproof the exterior of the building. Therefore, waterproofing work is carried out from the inside. This is because concrete is always in contact with water and leakage is not seen inside. However, And the waterproofing applied inside is not able to waterproof the entire cross-sectional thickness. If cracks occur in the concrete, crack resistance is not given to the waterproof layer, and the waterproof layer is also broken and water penetrates, The concrete is peeled off and cracks are enlarged to affect the durability of the building, and it is economically disadvantageous to repair it periodically.

In order to solve such a conventional problem, the present applicant filed a patent application (Application No. 10-2013-0134053) on November 6, 2013, and filed a patent application on Feb. 24, 2014 (Registration No. 10-1368992).

No. 10-1368992 of the present applicant discloses that the entire cross-section of the concrete is water-milled so that no separate waterproofing work is required, and self-healing is possible through leakage of cracks due to cracks inevitably occurring in concrete, , The composite catalyst is formed to continuously form modified calcium silicate hydrate crystals so that the self-healing can be permanently performed when cracks occur in the concrete, and the strength of the concrete is increased.

However, Japanese Patent Registration No. 10-1368992 discloses that a slump loss and a slump increase due to increase or decrease in fluidity due to collision with water, an admixture and the like in aggregate charged in a concrete mixer plant occur, and the chloride contained in the crushed aggregate And there is a problem that the waterproofing agent hardens due to moisture absorption during long-term storage and storage of the waterproofing agent.

Registration No. 10-1368992 (Powder type concrete waterproofing agent for concrete admixture)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a concrete mixer and a delaying agent for preventing slump loss and increase due to increase or decrease of fluidity due to collision with water, The crystalline quartz is mixed with more than quartz and quartz is heated at a heating rate of 15 to 25 ° C / min in a sintering furnace to a temperature of 800 to 1470 ° C., It is an object of the present invention to provide a powder type concrete waterproofing agent for incorporating a crystal growth type concrete having an improved healing function.

In addition, it is an object of the present invention to provide a powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function which can keep the storage period of the powdery concrete waterproofing agent much longer than conventional ones by mixing talc and zinc stearate.

In addition, when the concrete is cracked, the composite catalyst formed by reacting with the penetrating water continuously forms the modified calcium silicate hydrate crystals, so that it is possible to permanently self-heal when the cracks occur in the concrete, It is an object of the present invention to provide a powder type concrete waterproofing agent for admixing a crystal growth type concrete having improved self-healing ability that can enhance the strength of the concrete and ensure the durability of the concrete.

In order to achieve the above-mentioned object, the powder type concrete waterproofing agent for improving the self-healing function of the present invention is prepared by mixing cement, silica, crystalline quartz and silver quartz and then heating at high temperature to remove quartz, talc talc and zinc stearate are mixed.

60 to 85 parts by weight of silica sand, 15 to 25 parts by weight of quartz treated with high-temperature, 2 to 5 parts by weight of talc and 2 to 5 parts by weight of zinc stearate may be mixed with 100 parts by weight of the cement.

The crystalline quartz and the quartz crystal can be mixed in a ratio of 4: 3.

The crystalline quartz and the silver quartz are mixed in a ratio of 4: 3 and then heated at a heating rate of 15 to 25 ° C / min in a sintering furnace to a temperature of 800 to 1470 ° C, followed by calcination for 1 to 2 hours .

Furthermore, the calcined quartz crystal is fired at a temperature of 800 to 1470 ° C for 1 hour to 2 hours, and the transformed quartz crystal can be used as a granule having a diameter of 0.2 mm or less.

The talc and the zinc stearate may have a particle size of 200 mesh to 325 mesh or less.

In order to accomplish the above object, the present invention provides a method of manufacturing a powdery concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function, comprising mixing 60 to 85 parts by weight of silica sand with 100 parts by weight of cement for 20 minutes a); (B) adding 15 to 25 parts by weight of quartz heated at a high temperature after mixing the crystalline quartz and the silver quartz with 100 parts by weight of the cement for 30 minutes; And (c) adding 2 to 5 parts by weight of talc and 2 to 5 parts by weight of zinc stearate to 100 parts by weight of cement for 40 minutes.

The crystalline quartz and the quartz crystal can be mixed in a ratio of 4: 3.

The high-temperature-treated quartz is prepared by mixing crystalline quartz and silver quartz at a ratio of 4: 3, heating the mixture at a heating rate of 15 to 25 ° C / min in a firing furnace to obtain a temperature of 800 to 1470 ° C, Lt; 0 > C for a period of time.

Further, the quartz crystal transformed by calcining for 1 hour to 2 hours after allowing the temperature to become 800 to 1470 ° C may be made into granules having a diameter of 0.2 mm or less.

The talc and the zinc stearate may have a particle size of 200 mesh to 325 mesh or less.

According to the powder type concrete waterproofing agent for admixing a crystal growth type concrete with improved self-healing function according to the present invention, by injecting into a batch plant at the time of concrete production, the whole cross section of the concrete can be made water- It is possible to self-heal leaks through cracks which are inevitably generated in concrete, thereby preventing corrosion of reinforcing bars and detachment of concrete and maintaining the durability of buildings.

In addition, when cracks occur in the concrete, it reacts with particles of water and cement that penetrate to form modified calcium silicate hydrate crystals to fill the cracks. In addition to this, the composite catalyst produced by the reaction with water forms modified calcium silicate hydrate crystals By continuously promoting the formation of cracks, it is possible to permanently self-heal when cracks occur in the concrete, and the strength of the concrete is increased.

In addition, it is possible to make a waterproofing agent having more self-healing function and anti-rusting function by increasing the amount of crystalline quartz than silicate quartz and heating and heating at a heating rate of 15 to 25 ° C / min, .

Further, by mixing talc and zinc stearate, the slump maintenance performance can be secured and the storage period of the waterproofing agent can be maintained to be about 10 years.

FIGS. 1A and 1B are photographs showing a crystal of calcium silicate hydrate, which is a self-healing substance formed by reaction with water in a gap formed in concrete. FIG.
FIG. 2 is a quality test report of a concrete to which a powder type concrete waterproofing agent for admixing a crystal growth type concrete with improved self-healing function according to the present invention is applied.
FIG. 3 is a rust-proof test report on corrosion of reinforcing bars by applying powder-type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function according to the present invention.
4 is a flowchart of a method of manufacturing a powdery concrete waterproofing agent for incorporating a crystal growth type concrete having an improved self-healing function.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or having) " do not exclude the presence or addition of one or more other constituents and actions .

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

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

1 to 4, the present invention relates to a method for producing a ready-mixed concrete, which comprises preparing a powdery concrete material for incorporating a crystal growth type concrete having an improved self-healing function with respect to 100 parts by weight of cement in a batch plant, 0.8 to 2 parts by weight of a waterproofing agent is added to react with water and cement particles in concrete to induce a complex crystal growth process to make the entire cross section of the concrete water- The present invention relates to a concrete waterproofing agent for incorporating a crystal growth type concrete in which a modified calcium silicate hydrate crystal is formed by reacting with a calcium silicate hydrate to promote the formation of modified calcium silicate hydrate crystals continuously so as to block leakage and self-healing permanently.

According to the present invention, a powder type concrete waterproofing agent for improving the self-healing function of a crystal growth type concrete admixture comprises cement, silica, crystalline quartz and quartz quartz mixed and then heated at a high temperature to form quartz, talc and zinc stearate (Zinc Stearate) are mixed.

Cement is a kind of ordinary Portland cement, and its chemical composition and physical performance meet the criteria of Portland cement.

Silica sand (silica sand) increases the fluidity of concrete when it has many fine particles but it affects fluidity, pumping property and air entraining property depending on its size. Therefore, silica sand having a grain size of not more than 150 mesh Is preferably used. When silica sand having a mesh size of 150 mesh or more is used, it tends to be separated from each other and the fluidity deteriorates and the pumping property is deteriorated.

Specifically, it is preferable to mix 60 to 85 parts by weight of silica sand with 15 to 25 parts by weight of quartz treated with 2 to 5 parts by weight of talc and 2 to 5 parts by weight of zinc stearate with respect to 100 parts by weight of cement.

It is preferable that silica sand has a ratio of 60 to 85 parts by weight based on 100 parts by weight of cement in consideration of workability for cement. If it is used in an amount less than 60 parts by weight, it affects the strength of the powder-type sphere waterproofing agent. When the amount exceeds 85 parts by weight, the waterproofing and rust prevention efficiency are lowered.

When the talc and zinc stearate are used in an amount of less than 2 parts by weight, aggregation inhibition and uniform dispersibility of the powder may be deteriorated. When the amount of the talc and the zinc stearate is more than 5 parts by weight, Therefore, it is preferable to mix 2 to 5 parts by weight of talc and zinc stearate, respectively.

If talc and zinc stearate are less than 200 ~ 325 mesh in size, mixing failure will occur with other mixture. If they are exceeded, granules will be differentiated from other mixture when put into batch plant. Therefore, talc and zinc stearate preferably have a particle size of 200 to 325 mesh.

The high temperature treated quartz can be obtained by mixing the crystalline quartz and the silver quartz and heating them at a high temperature.

When less than 15 parts by weight of the quartz is used, the crystal growth is reduced and the self-healing function of the concrete pores and cracks is lowered. As a result, the quartz exhibits an additional strength and rust- If the amount is more than 50 parts by weight, the cost is low due to high cost due to excessive use, and there may arise a problem of causing poor blending with other blends.

On the other hand, crystalline quartz and silver quartz are mixed in a ratio of 4: 3. In addition, crystalline quartz and silver quartz are blended in a ratio of 4: 3 and then heated at a temperature raising rate of 15 to 25 캜 / min in a sintering furnace to obtain a temperature of 800 to 1470 캜, followed by baking for 1 to 2 hours use.

It is important to properly blend crystalline quartz and silver quartz. The combination of two of the two can be used to maximize the effect of activating and rust-inhibiting the crystal and enhancing the strength of the concrete.

When more silver quartz is added than crystalline quartz, it may cause deterioration of rustproofing function and strength of concrete. Since the crystalline quartz has a higher Mohs hardness than the quartz quartz and activates the growth of the crystal, it is more effective to prevent the corrosion of the rebar by the chloride incorporated into the concrete by adding more crystalline quartz than the quartz quartz, . Therefore, it is preferable to blend crystalline quartz and silver quartz at a ratio of 4: 3.

When the crystalline quartz and the quartz crystals are mixed at a ratio of 4: 3 and then proceeding to 15 ° C / min or less in the calcining furnace, a problem occurs in that the productivity is deteriorated because a long treatment is required. When the temperature exceeds 25 ° C / min, It is confirmed that the transformation of the quartz crystal before calcination causes a problem that the transformation of calcined calcium carbonate hydrate crystals occurs. Therefore, it is preferable that the baking furnace is heated at a heating rate of 15 to 25 占 폚 / min.

When crystalline quartz and quartz crystals are mixed and heated at high temperature, they are transformed into tridymite at 850 ° C and then transformed into cristobalite at 1450 ° C.

Specifically, after firing at a temperature of 800 to 1470 캜 for 1 hour to 2 hours, the quartz crystal transformed into cristobalite is passed through a rod mill having a diameter of 0.2 mm through a perforated rod mill to make granules having a diameter of 0.2 mm do.

In the case of calcining for less than 1 hour, impurities are not completely removed and complete transformation with cristobalite is not achieved. In case of calcining for more than 2 hours, the production of Ca-coupled catalyst (complex catalyst) And the production rate of Therefore, it is preferable to perform the calcination treatment at a temperature of 800 to 1470 DEG C for 1 to 2 hours.

A waterproofing agent containing quartz crystals transformed into cristobalite reacts with the particles of water and cement that permeate when cracks occur in the concrete to produce a Ca-coupled catalyst (composite catalyst), and the Ca- By promoting the formation, the modified calcium silicate hydrate crystals in the form of crystals fill the cracks.

The reaction of the catalyst with the particles of water and cement to produce modified calcium silicate hydrate crystals continues to be permanent after the hydration of the concrete, so that the cracks of the concrete can be self-healed and the strength is improved, .

Referring to FIGS. 1A and 1B, a self-healing material (modified calcium silicate hydrate) formed by reaction of particles of water and cement in a gap formed in concrete is formed as a white substance on the surface of concrete, Represents a filled state.

The growth process of the modified calcium silicate hydrate crystals will be described in detail below.

The powder type concrete waterproofing agent for improving the self-healing function according to the present invention is hydrophilic, unlike the hydrophobic material, and has a self-healing function. The powder type concrete waterproofing agent for mixing the concrete with growth type concrete, This reaction leads to a complex crystal growth process that reacts with cement particles, which reacts not only with the various metal oxides contained in the concrete during cement hydration but also with unhydrated or partially hydrated cement particles, including calcium hydroxide and aluminum do.

This catalytic reaction maintains the reaction when moisture is present in the concrete. In other words, when contact with water or moisture, the reaction is carried out permanently.

The powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function according to the present invention causes a complex crystal growth process in concrete, and the process is based on the following three steps of reaction.

[Step 1 reaction]

The CaCo ₃ crystals formed in the first-step reaction are formed and block the penetration of water, which is capillary blocking, and a two-step reaction occurs by the water-soluble silicate produced in the reaction.

[Step 2 reaction]

Water-soluble silicate (silicon dioxide) + Ca (OH) ₂ -> CSH crystal <Modified calcium silicate hydrate crystal>

The water-soluble silicate reacts with the Ca (OH) ₂ present in the concrete to form a modified CSH crystal (CaSiO ₃ · nH ₂ O), which creates impermeable concrete.

 [Step 3 reaction]

Catalyst combined with Ca + water -> crystal formation reaction (modified calcium silicate hydrate crystal formation reaction) -> reduction of catalyst -> catalyst combined with Ca

When a water - proofing agent containing crystals transformed by calcining crystalline quartz and silver quartz at high temperature meets with water, a Ca - coupled catalyst is formed by bonding with Ca ^{3 +} and Mg ^{3 +} , and a three - step reaction is started. This catalyst combined with Ca is a complex catalyst element which is divided into two anions when it comes into contact with water or water and combines with Ca ^{2 +} cation to provide Ca ^{2 +} to SiO ₃ ^{2 -} and scattered in all directions. This function serves as a mediator for successive interactions of the three-step reaction.

In other words, the catalyst combined with Ca reacts with water or water to produce modified CSH crystals (CaSiO _{3 ·} nH ₂ O) given Ca ^{2 +} to SiO ₃ ^{2 -} do.

The catalysts combined with Ca are reactivated when moisture or water is generated by newly occurring cracks even after the hydration of the concrete, to form modified C-S-H crystals. The role of this catalyst becomes a cyclic cycle and is permanent.

The powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function according to the present invention is characterized in that it has a coagulation time difference and a compressive strength which can be caused by a collision between various admixtures and an admixture to improve the performance in the above- , Water resistance, and rust resistance.

Referring to FIG. 2, there is shown a test (test method KS F 4926: 2012) of a concrete to which a powder type concrete waterproofing agent for admixing a crystal growth type concrete with improved self-healing function is applied.

(1, 3, 7, 28, 91 days), water absorption coefficient ratio, permeability ratio, chlorine ion And depth of penetration satisfy the test criteria.

In particular, it was found that the resistance performance (relative dynamic elasticity coefficient) against freezing and thawing was 91%, which is considerably superior to the standard (80% or more), and the resistance performance against freezing and thawing (80% or more).

The compressive strength ratio (91 days) is 1.20, which is superior to the standard (1.0 or more). The water absorption coefficient ratio is 0.6, which is superior to the standard (0.7 or less) and the permeability ratio is 0.5 Respectively. As a result of the test, it was confirmed that the present invention has not only an effect of improving the strength of concrete but also an excellent waterproofing function.

In particular, the penetration depth of chlorine ions was 0.7, which was significantly superior to the standard (3.0 or less). It is understood that the present invention is extremely excellent in the anticorrosion function for preventing the corrosion of the reinforcing bars in the concrete.

Referring to FIG. 3, there is shown a test result of a reinforcing steel corrosion promotion test (test method KS F 2561 - '13) of a concrete to which a powder type concrete waterproofing agent for incorporating a crystal growth type concrete with improved self-healing function is applied.

The rusting rate is calculated by the following formula.

l = (? P _0.2 - ?? _0.2 ) /? P _0.2? 100

l: rusting rate (%)

Σ P _0.2 : total corrosion area of six reinforcing bars of test concrete (P _0.2 ) (mm ² )

Σl _0.2 : The total corrosion area (mm ² ) of six reinforcing bars of the concrete (l _0.2 )

A retest was conducted when the corrosion rate was less than 95% and the total corrosion area of the six reinforcing bars of the reference concrete (P _0.04 ) exceeded 20 mm ² .

The saline solution shall be prepared so that each medicine in Table 1 dissolves only the specified mass and becomes the total amount of 1 L of aqueous solution. However, the saline solution was prepared for each test. Table 1 shows the composition of the saline solution.

Referring to Figure 3, cement 300 kg / m ^3, water, 128.5 kg / m ^3, saline solution 48.5 kg / m ^3, fine aggregate 800 kg / m ^3, the coarse aggregate 1,093 kg / m ^3, and the powdered concrete waterproofing agent according to the invention (3 kg / m ³ ), the rust inhibition rate (l) was 95.8%. It is confirmed that the concrete mixed with the powder type concrete waterproofing agent for mixing the crystal growth type concrete with improved self-healing function according to the present invention has a rust prevention rate of 95% or more.

Referring to FIG. 4, a method for preparing a powdery concrete waterproofing agent for incorporating a crystalline growth type concrete having improved self-healing function according to the present invention comprises mixing 60 to 85 parts by weight of silica sand with 100 parts by weight of cement in a mixer, Gt; (a) &lt; / RTI &gt; A stirring time of 20 minutes is required for sufficient mixing of cement and silica sand.

Next, 15 to 25 parts by weight of quartz heated at a high temperature by mixing crystalline quartz and silver quartz with 100 parts by weight of cement are mixed and stirred at 600 rpm for 30 minutes (steps (b) and (S420)). For sufficient mixing of the quartz treated with high temperature, stirring should be continued for a longer period of time than the step (a).

The high-temperature-treated quartz is mixed with the crystalline quartz and the quartz quartz at a ratio of 4: 3, heated at a heating rate of 15 to 25 ° C / min in a sintering furnace, heated to a temperature of 800 to 1470 ° C, And calcined at 800 to 1470 ° C for 1 hour to 2 hours to make the transformed quartz crystals into granules with a diameter of 0.2 mm or less.

Finally, 2 to 5 parts by weight of talc and 2 to 5 parts by weight of zinc stearate are mixed with 100 parts by weight of cement, and stirred at 600 rpm for 40 minutes (steps (c) and S430). Since talc and zinc stearate are small in amount, it is confirmed that sufficient stirring is required for 40 minutes, which is longer than step (b). Talc and zinc stearate are mixed with a particle size of 200 to 325 mesh.

Hereinafter, the powder type concrete waterproofing agent for incorporating a crystal growth type concrete having an improved self-healing function according to the present invention will be described in more detail with reference to the following Experimental Examples and Comparative Examples. The following examples and comparative examples illustrate the invention in more detail but do not limit the scope of the invention.

<Experimental Example>

In the mixer, 100 parts by weight of cement and 70 parts by weight of silica sand were stirred at 600 rpm for 20 minutes, and 20 parts by weight of quartz which had been treated by heating at high temperature after mixing the crystalline quartz and silver quartz were further mixed and stirred at 600 rpm for 30 minutes , 4 parts by weight of talc and 3 parts by weight of zinc stearate were further mixed and stirred at 600 rpm for 40 minutes to prepare a powdery spherical waterproofing agent. Silica sand having a diameter of about 150 mesh was used, and talc and zinc stearate having a particle size of 200 to 325 mesh were used.

Here, the quartz subjected to the high-temperature treatment was blended in a ratio of 4: 3 of the crystalline quartz and the quartz of the quartz, and was heated at a heating rate of 20 ° C / min in a sintering furnace to a temperature of 820 ° C, Lt; 0 &gt; C, followed by calcination for 1 hour. The quartz crystals transformed after firing were made into granules having a diameter of 0.2 mm or less.

The other specific conditions were prepared by applying the same method as described in the above-mentioned method for producing a powder type spherical water repellent.

<Comparative Example>

100 parts by weight of cement and 70 parts by weight of silica sand, 20 parts by weight of quartz heated at high temperature after mixing with crystalline quartz and silver quartz, and 1 part by weight of fluidizing agent and 1 part by weight of retarder were mixed at 600 rpm for 70 minutes A powder type spherical water repellent agent was prepared. Silica sand having a diameter of 150 mesh was used. The fluidizing agent was a polycarboxylic acid-based powder fluidizing agent and the retarding agent was tartaric acid.

The high-temperature-treated quartz was prepared by mixing the crystalline quartz and the quartz quartz at a ratio of 2: 3, calcining the mixture at a temperature of 820 ° C. for 40 minutes, allowing the temperature to reach 1450 ° C., Lt; / RTI &gt; The quartz crystals transformed after firing were made into granules having a diameter of 0.2 mm or less.

In order to compare the strength of the waterproofing, anticorrosive function and concrete, the powder type concrete waterproofing agent for mixing the crystalline growth type concrete with improved self-healing function manufactured by the experiment according to the present invention and the waterproofing agent prepared by the comparative example 10-1368992) were each prepared in an amount of 700 g.

First, the water absorption coefficient ratio related to the waterproofing was tested. As a result, the water absorption coefficient ratio of the powder type concrete waterproofing agent for incorporating the crystalline growth type concrete with improved self-healing function according to the present invention was 0.6, and the water absorption coefficient The coefficient ratio was 0.7 (test method KS F 4926: 2012).

As a result of the permeability test, the permeability ratio of the powder type concrete water repellent for incorporating the crystalline growth type concrete with improved self-healing function according to the present invention was 0.5, and the permeability ratio of the water repellent agent according to the comparative example was 0.6 (Test Method KS F 4926 : 2012).

As a result of the compression strength test, the compressive strength ratio (91 days) of the powder type concrete water repellent for incorporating the crystalline growth type concrete with improved self-healing function according to the present invention was 1.20, and the compressive strength ratio of the waterproofing agent ) Was 1.12 (test method KS F 4926: 2012).

As a result of testing the penetration depth of the chloride ion related to the rust-preventive function, the penetration depth of the waterproofing agent according to the present invention was 0.7, and the penetration depth of the waterproofing agent according to the comparative example was 1.6 (Test Method KS F 4926: 2012).

Further, as a result of further tests relating to the rustproofing property (reinforcing corrosion resistance test in concrete), the rustproofing rate (l) of the waterproofing agent according to the present invention was 95.8%, and the rustproofing rate (l) of the waterproofing agent according to the comparative example was 92.5%.

As a result of the above tests, it was confirmed that the powder type concrete waterproofing agent for incorporating the crystalline growth type concrete having improved self-healing function according to the present invention had better water absorption coefficient and water permeability ratio than the waterproofing agent according to the comparative example. As a result of the compression strength comparison, it was found that the compressive strength of the concrete using the waterproofing agent according to the present invention was better. Also, it was confirmed that the corrosion resistance of the concrete using the waterproofing agent according to the present invention was also superior in the rust-preventive property.

As described above, the powder type concrete waterproofing agent for incorporating a crystal growth type concrete having improved self-healing function according to the present invention exerts excellent effects in waterproof, rustproofing and compressive strength compared to the prior art.

According to the present invention, it is possible to produce a waterproofing agent having an increased anticorrosion function by increasing the strength by blending more crystalline quartz than silver quartz and heating at a heating rate of 15 to 25 캜 / min and then calcining.

Furthermore, by mixing talc and zinc stearate, the waterproofing agent can be inhibited from agglomeration and decomposed to ensure storage stability and does not affect the slump retention performance of the compounded concrete.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Obviously, such modifications are intended to be within the scope of the claims.

Claims (11)

In the mixer, 60 to 85 parts by weight of silica sand having a diameter of 150 mesh or less were mixed for 20 minutes with respect to 100 parts by weight of cement for 20 minutes, and 15 to 25 parts by weight of quartz subjected to high temperature treatment were added at 600 rpm for 30 minutes 2 to 5 parts by weight of talc and 2 to 5 parts by weight of zinc stearate were further mixed at 600 rpm for 40 minutes,
The talc and zinc stearate have a particle size of 200 to 325 mesh. The crystalline quartz and the silver quartz are mixed in a ratio of 4: 3, and the crystalline quartz and the silver quartz are mixed in a ratio of 4: 3. Heated to a temperature of 820 ° C., calcined for 40 minutes, allowed to reach a temperature of 1450 ° C., calcined for 1 hour, quartz crystals transformed into grains having a diameter of 0.2 mm or less Wherein the self-healing function is improved.
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