KR101835050B1 - Self-healing fine agreegate for mortar and self-healing mortar using the same. - Google Patents
Self-healing fine agreegate for mortar and self-healing mortar using the same. Download PDFInfo
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- KR101835050B1 KR101835050B1 KR1020150107891A KR20150107891A KR101835050B1 KR 101835050 B1 KR101835050 B1 KR 101835050B1 KR 1020150107891 A KR1020150107891 A KR 1020150107891A KR 20150107891 A KR20150107891 A KR 20150107891A KR 101835050 B1 KR101835050 B1 KR 101835050B1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4857—Other macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5057—Carbides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The primer layer 110 coated on the surface of the fine aggregate 100 with a primer 111 and the primer layer 110 coated on the surface of the fine aggregate 100 to recover the crack by hydration reaction with water penetrating through cracks when cracking of the mortar occurs. The self-healing layer 120 formed by attaching the self-healing material 121 to the surface of the self-healing material 121 and the self-healing material 121 And a first protective layer 130 covering the first protective layer 130 and the second protective layer 130.
According to the present invention, the coating aggregate for a self-healing mortar and the self-healing mortar using the self-healing mortar can minimize maintenance because the self-healing mortar reacts with water permeating at the time of cracking,
Further, according to the present invention, the maintenance cost for maintenance of the cracked portion of the structure can be minimized.
Description
The present invention relates to a construction material field, and more particularly, to a coating material for a self-healing mortar and a self-healing mortar using the same.
Concrete and mortar are the most commonly used materials for residential spaces such as houses, roads, bridges, skyscrapers, dams, and other social infrastructure.
However, in concrete and mortar, heat is generated by hydration reaction at the time of curing, and drying shrinkage crack occurs due to heat.
Cracks deteriorate the durability and deteriorate the safety of the structure in the long term. In addition, moisture penetrating through the cracks corrodes the reinforcing bars, and the corroded reinforcing bars become bulky and further promote cracking.
The repair of such cracks is mainly performed by a method of injecting (filling) a polymer mortar, an epoxy resin and a plastic epoxy resin into a cracked portion by using a resin material and a surface treatment method of coating the surface by using an elastic sealing material and a coating elastic waterproofing material have.
However, the repair methods do not completely integrate with the surface of the mortar, or have difficulty in filling the cracks completely.
The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a self-healing material which is coated with a self-healing material directly on the surface of a fine aggregate using an inorganic material and which is filled with crack- It is an object of the present invention to provide a coated aggregate for a healing mortar and a self-healing mortar using the same.
In order to solve the above problems, the present invention provides a method for recovering cracks by reacting with a primer layer (110) coated on a surface of a fine aggregate (100) with a primer layer (110) The self-
It is preferable that the primer (111) is mixed with PVAc based composite polymer and water at a weight ratio of 8: 2.
The self-healing material 121 comprises 45 to 83 wt% of cement, 3 to 10 wt% of bentonite, 5 to 15 wt% of an expanding agent, 3 to 10 wt% of lithium carbonate, 3 to 10 wt% of sodium carbonate, and 3 to 10 % By weight.
The protective material 131 is preferably mixed with a water-soluble PVA film and water in a weight ratio of 10: 1.
The
The present invention relates to a coating material for a self-healing mortar and a self-healing mortar using the same, wherein a primer coating step of forming the
Preferably, the self-healing material attaching step attaches the self-healing material 121 in powder form while the viscosity of the
The self-healing layer drying step is preferably performed at a temperature of 40 to 50 ° C after attaching the self-healing material 121.
A second protective material coating step of further coating the second
And a secondary drying step of drying the secondary
The self-healing mortar using the self-healing coated aggregate according to the present invention comprises 20 to 30% by weight of cement, 50 to 65% by weight of fine aggregate, 0.7 to 1% by weight of fluidizing agent, 3 to 15% 7 to 10% by weight.
The fluidizing agent is preferably naphthalene-based.
The self-healing concrete can be manufactured by combining the self-healing mortar with the coarse aggregate.
The coating aggregate for the self-healing mortar of the present invention and the self-healing mortar using the self-healing mortar can minimize maintenance because the self-healing mortar is self-healing due to the reaction with water permeating at the time of cracking.
According to the present invention, it is possible to reduce the maintenance cost for maintenance of the cracked portion of the structure.
1 is a sectional view of a coated aggregate according to an embodiment of the present invention;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which like or corresponding elements are denoted by the same reference numerals, And redundant explanations thereof will be omitted.
It is also to be understood that the terms first, second, etc. used hereinafter are merely reference numerals for distinguishing between identical or corresponding components, and the same or corresponding components are defined by terms such as first, second, no.
In addition, the term " coupled " is used not only in the case of direct physical contact between the respective constituent elements in the contact relation between the constituent elements, but also means that other constituent elements are interposed between the constituent elements, Use them as a concept to cover each contact.
Hereinafter, the coating aggregate for self-healing mortar and the self-healing mortar using the same according to an embodiment of the present invention will be described in detail with reference to the accompanying tables and drawings.
The coated aggregate according to the present invention comprises a
That is, since the self-healing mortar of the present invention is coated with the protective material (131) on the surface of the fine aggregate (100) before the mortar mixing, the self-filling of the cracked portion It is possible.
The self-healing material 121 is stably attached to the surface of the fine aggregate by the primer coated on the surface of the fine aggregate. After the self-
The primer (111) is preferably mixed with PVAc based composite polymer and water at a weight ratio of 8: 2.
In this case, since the PVAc system having excellent adhesion is mixed with water, the self-healing material 121 can be stably and stably attached to the aggregate surface.
The self-healing material 121 comprises 45 to 83% by weight of cement, 3 to 10% by weight of bentonite, 5 to 15% by weight of an expanding agent, 3 to 10% by weight of lithium carbonate, 3 to 10% by weight of sodium carbonate and 3 to 10% by weight of sodium hydrogencarbonate %.
In this case, since the self-healing material is mixed through a blender and produced in powder form, it is easy to manufacture and store, and it is easy to adhere to a primer having high viscosity.
It is preferable that the protective material 131 is mixed with a water-soluble PVA film and water at a weight ratio of 10: 1.
In this case, since the solid PVA film is mixed with water and coated in a semi-solid state, the self-
The coating of the protective material can be sprayed onto the aggregate using an injector, and spraying and drying can be carried out simultaneously according to the site conditions.
The
In this case, since the self-
The method for producing a coating material for a self-healing mortar according to the present invention includes a primer coating step of forming a
In this case, the primer layer mixes the fine aggregate for a predetermined time while spraying the primer to the fine aggregate. Then, before the primer layer is hardened, the self-healing material 121 of the powder is sprayed and mixed for a predetermined time.
Thereafter, the primer layer with the self-healing material is dried, and the protective material 131 is sprayed using an injector.
The primary protective layer mixes the aggregate while spraying the protective material using an injector.
In the course of mixing the aggregate, it is also possible to apply the protective material and dry simultaneously using a hot air blower and a drier.
The primary drying step may be natural drying or drying using a dryer.
In the self-healing reattachment step, it is desirable to attach the self-healing material 121 in powder form while the viscosity of the
In this case, the self-healing material is stably attached to the surface of the fine aggregate by increasing the adhesiveness due to the viscosity of the primer layer.
The self-healing layer drying step is preferably performed at a temperature of 40 to 50 ° C after attaching the self-healing material 121.
In this case, the self-healing material that is dried at a temperature of 40 to 50 ° C can be quickly and stably attached to the fine aggregate and fixed, thereby shortening the processing time.
The coated aggregate further includes a secondary protective material coating step for further coating the secondary
In this case, since the self-
The mortar using the coating material for the self-healing mortar comprises 20 to 30% by weight of the cement, 50 to 65% by weight of the fine aggregate, 0.7 to 1% by weight of the fluidizing agent, 3 to 15% .
In this case, since the self-healing mortar can be manufactured only by using the aggregate coated with the self-healing material 121, the manufacturing method is easy.
In addition, since some aggregates are coated with self-healing material prior to mortar blending, homogeneous quality can be secured in mortar blending.
The fluidizing agent is preferably naphthalene-based.
In this case, since the water-cement ratio can be reduced, strength development is easy and workability can be secured easily.
The mortar of the present invention suggests a self-healing concrete containing coarse aggregate.
In this case, self-healing concrete can be used in houses, roads, bridges and skyscrapers to reduce maintenance costs.
Hereinafter, experimental examples for explaining the effects of the present invention will be described.
This experiment is the result of comparing the strength of mortar with general mortar and self - healing coated aggregate by uniaxial compression.
Table 1 shows the mixing ratios of the samples of the present invention (mortar using self-healing coated aggregate) and the comparative example (general mortar).
[Table 1] Mortar formulation table
MD1 to MD5, which are embodiments of the present invention, are prepared by coating an aggregate with an auto-healing material. In the first embodiment MD1, the aggregate of 1% MD2 is a specimen prepared by coating an aggregate of 2.5% of aggregate with an auto-healing material, Example 3 MD3 is a specimen prepared by coating an aggregate of 5% of aggregate with an auto-healing material MD4 is a specimen prepared by coating an aggregate of 7.5% of aggregate with an auto-healing material, Example 5 MD5 is a specimen prepared by coating an aggregate of 10% of aggregate with an auto-healing material, to be.
The test specimens used in this experiment were 50 × 50 × 50 mm specimens prepared according to KS FL ISO 679. In order to limit the initial reaction of the self - healing ingredients, the specimens were cured at 7, 14 and 28 days And the compressive strength was measured using a universal testing machine (UTM).
[Figure 1] shows the compressive strength test results. At the beginning of the curing period, the MD3, MD4 and MD5 specimens of the third, fourth and fifth embodiments were somewhat less intense than the comparative plains, The strength of the mortar was all improved, and the difference in strength between Plain, MD1, MD2, MD3, MD4 and MD5 after 28 days was found to be insignificant.
[Figure 1] Compression test result
[Figure 2] shows the results of the bending strength test. For the bending strength test, specimens of 160 × 40 × 40 mm were prepared in accordance with KS L ISO 679, and specimens cured for 28 days were used to limit the initial reaction of the self- Respectively.
[Figure 2] Bending strength test results
As a result of the test, it was confirmed that the tensile strength of Examples MD1 to MD4 was higher than that of Comparative Example Plain, and Example MD5 exhibited similar strength to Plain of Comparative Example MD5.
[Figure 3] shows the results of the bond strength test, and the bond strength test was conducted according to KS F 4716. The specimens were subjected to standard curing for 28 days, followed by attaching a steel jig to the coated mortar and measuring the maximum tensile load by applying a tensile force in the vertical direction.
[Figure 3] Bond strength test result
Test results Example MD1 to MD5 All of the comparative examples It can be confirmed that the adhesion strength to the plain is improved.
[Figure 4] is the result of the permeability test, and the permeability test is an experiment to confirm the crack restoration performance of the self-healing mortar of the present invention.
The permeability coefficient test was carried out using a variable water permeability test with reference to KS F 2322.
[Figure 4] Results of permeability test
Experimental Results Comparative Examples MD1 to MD5 of the present invention had a low coefficient of permeability compared to Plain specimens. The experimental results show that the amount of water permeated by the cracks of the MD1 to MD5 specimens of Examples is smaller than that of the comparative Plain.
As described above, the scope of the present invention should not be construed as being limited to the above-described embodiments and experimental results, and it should be understood that the present invention is not limited to the above- , It is to be understood that both the technical idea of the present invention and the technical idea underlying the invention described above are included in the scope of the present invention.
100: fine aggregate 110: primer layer
111: primer 120: self-healing layer
121: Self-healing material 130: Primary protective layer
131: Protection material 140: Second protection layer
Claims (12)
A self-healing layer (120) formed by attaching a self-healing material (121) to the surface of the primer layer (110) so as to restore the crack by hydration reaction with water penetrating through cracks when a mortar is cracked; And
And a primary protective layer (130) formed by coating the self-healing layer (120) with a protective material (131) so as to suppress the hydration reaction of the self-healing layer (120) during the initial hydration reaction of the mortar Coated aggregate for self-healing mortar.
Wherein the primer (111) is a PVAc-based composite polymer and water at a weight ratio of 8: 2.
The self-healing material 121
45 to 83% by weight of cement;
3 to 10% by weight of bentonite;
5 to 15% by weight of an expanding agent;
3 to 10% by weight of lithium carbonate;
3 to 10% by weight of sodium carbonate; And
And 3 to 10% by weight of sodium hydrogencarbonate.
The protection member 131
Wherein the water-soluble PVA film and water are mixed at a weight ratio of 10: 1.
And a secondary protective layer (140) formed on the surface of the primary protective layer (130) by being coated again with the protective material (131).
A primer coating step of coating the surface of the fine aggregate (100) with the primer (111) to form the primer layer (110);
Attaching the self-healing material (121) to the surface of the primer layer (110) to form the self-healing layer (120);
A self-healing layer drying step of drying the primer layer 110 to which the self-healing material 121 is attached;
A first protective material coating step of forming the first protective layer 130 by coating the protective material 131 on the self-healing layer 120; And
And a primary drying step of drying the primary protective layer 130. The method for producing a coated aggregate for a self-healing mortar according to claim 1,
Wherein the self-healing material attaching step attaches the self-healing material (121) in powder form while maintaining the viscosity of the primer layer (110).
Wherein the self-healing layer is dried at a temperature of 40 to 50 ° C after attaching the self-healing material (121).
A second protective material coating step of further coating the second protective layer 140 with the protective material 131 after the first protective material coating step; And
And a second drying step of drying the second protective layer 140. The method for manufacturing the coated aggregate for self-healing mortar according to claim 1,
20-30% by weight of cement;
Fine aggregate 50 to 65% by weight;
0.7 to 1% by weight of a fluidizing agent;
3 to 15% by weight of the aggregate for the self-healing mortar; And
And 7 to 10% by weight of water.
Wherein the fluidizing agent is a naphthalene-based self-healing mortar.
The mortar; And
Wherein the self-healing mortar comprises a coarse aggregate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150107891A KR101835050B1 (en) | 2015-07-30 | 2015-07-30 | Self-healing fine agreegate for mortar and self-healing mortar using the same. |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150107891A KR101835050B1 (en) | 2015-07-30 | 2015-07-30 | Self-healing fine agreegate for mortar and self-healing mortar using the same. |
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| Publication Number | Publication Date |
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| KR20170014466A KR20170014466A (en) | 2017-02-08 |
| KR101835050B1 true KR101835050B1 (en) | 2018-03-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102006786B1 (en) * | 2018-12-07 | 2019-08-02 | (주)거우에스앤씨 | Coating aggregate and construction method thereof |
| KR102006787B1 (en) * | 2018-12-07 | 2019-08-02 | (주)거우에스앤씨 | Coating aggregate and construction method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102150666B1 (en) * | 2018-12-07 | 2020-09-01 | (주)다음기술단 | Mortar composition for repairing concrete structure and repairing method of concrete structure thereof |
| KR102391141B1 (en) * | 2021-04-29 | 2022-04-26 | 이관섭 | Eco-friendly inorganic coating waterproofing agent |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100956396B1 (en) | 2008-07-16 | 2010-05-06 | 명흥식 | Manufacturing method of circulation aggregate |
| KR101192238B1 (en) | 2012-03-02 | 2012-10-17 | 국보환경(주) | Permeable paving manufacture method to use eco-friendly recycled aggregate double-coated |
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- 2015-07-30 KR KR1020150107891A patent/KR101835050B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100956396B1 (en) | 2008-07-16 | 2010-05-06 | 명흥식 | Manufacturing method of circulation aggregate |
| KR101192238B1 (en) | 2012-03-02 | 2012-10-17 | 국보환경(주) | Permeable paving manufacture method to use eco-friendly recycled aggregate double-coated |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102006786B1 (en) * | 2018-12-07 | 2019-08-02 | (주)거우에스앤씨 | Coating aggregate and construction method thereof |
| KR102006787B1 (en) * | 2018-12-07 | 2019-08-02 | (주)거우에스앤씨 | Coating aggregate and construction method thereof |
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| Publication number | Publication date |
|---|---|
| KR20170014466A (en) | 2017-02-08 |
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