Cross section repairing mortar composition for water collecting pipeline

Abstract

The concrete surface of the water collecting pipeline is filled with the section repairing mortar composition for the water collecting pipeline for repairing; the composition is prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SIO2), 0.5 to 1.0 part by weight of polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of an antifoaming agent and 5 to 10 parts by weight of silica aerogel. Thus, permeation of harmful components, carbon dioxide, moisture, and the like, which cause deterioration in durability of the concrete for the water collection duct, is prevented, the compressive strength, bending strength, and adhesive strength of the concrete for the water collection duct are improved, and the chemical resistance, impact resistance, and pollution resistance of the concrete for the water collection duct are improved.

Description

TECHNICAL FIELD

[0001] The present invention relates to a sectional repair mortar composition for a catchment pipeline and a concrete sectional repair reinforcement method using the same. BACKGROUND

[0002] Generally, a sewage pipeline for treating domestic or business sewage or a rainwater pipeline for discharging rainwater to a sewer system is buried underground, and the sewage pipeline and the rainwater pipeline are collectively referred to as a sewer pipeline. Such a sewer pipeline is connected to a plurality of sewer pipelines so as to move rainwater or sewage to a sewage treatment plant or a river.

[0003] Such a sewer pipeline is provided with a catchment pipeline to guide inflowing sewage to a sewage treatment plant for purification treatment.

[0004] The catchment pipeline is mainly made of concrete, and its section is generally circular, rectangular, or elliptical. When the catchment pipeline buried underground is deteriorated due to aging, cracks due to impact, expansion and contraction of a joint portion, etc., excavation and new construction are performed on the buried area of the catchment pipeline, or the leakage area is directly repaired.

[0005] Here, the concrete of the catchment pipeline reacts with a cement hydrate (aluminate) in the concrete to produce a new compound, and at the same time, the concrete expands. The expansion pressure at this time causes the concrete to deteriorate.

[0006] That is, the reason for the deterioration of the concrete of the catchment pipeline is that the cement hydrate in the concrete reacts with a chemical substance (corrosive substance) to make the internal structure of the cement hardened body porous, and the cement hydrate reacts with a substance such as a sulfate to produce an expansion pressure of a compound, causing the concrete to deteriorate.

[0007] In addition, since Ca(OH) generated by the hydration reaction of cement makes the concrete of the catchment pipeline strongly alkaline (pH 12 to 13), a reinforcing bar embedded in the concrete is generally not corroded. However, if the concrete is long-term exposed to carbonic acid gas in the air, calcium hydroxide in the concrete gradually changes to calcium carbonate, and the pH value decreases to about 0.8 to 10, thereby causing neutralization in which the concrete loses the alkaline property.

[0008] Such neutralization proceeds from the surface of the concrete to the inside, and the concrete becomes heavier and denser when reacting with carbonic acid gas. When the concrete is neutralized, water and air penetrate, the reinforcing bar is corroded, the reinforcing bar volume expands, causing the concrete to crack, and thus the structure loses strength and durability.

[0009] To prevent the above phenomenon, the existing method is to penetrate polyol and isocyanate into the surface of the concrete and to harden, and to coat the surface of the concrete with an epoxy resin containing a general pigment to prevent neutralization and salt damage of the surface of the concrete.

[0010] Since this coating method relies only on the physical strength and chemical stability of the hardened product of the epoxy resin to achieve the purpose, the coating film is easily damaged by sand or dust blown by the wind, causing moisture to penetrate the surface of the concrete, causing the coating film to peel off, and failing to achieve permanent neutralization and salt damage prevention, requiring repeated repair work in the short term, resulting in economic losses.

[0011] The related art of the present invention is Korean Patent Publication No. 101636030 (publication date: July 5, 2016), which discloses a technology related to "high-strength polymer mortar composition using mixed silicon carbide (Sic) fibers and anti-neutralization and concrete multi-surface repair and reinforcement method using fixed pins." SUMMARY

[0012] (1) Technical problem to be solved

[0013] Various embodiments of the present invention are intended to provide a sectional repair mortar composition for a water collection pipeline and a concrete sectional repair and reinforcement method using the same, which repairs by filling a sectional repair mortar composition for a water collection pipeline on the surface of the concrete of the water collection pipeline, wherein the sectional repair mortar composition for a water collection pipeline is prepared by mixing 30-50 parts by weight of Portland cement, 10-20 parts by weight of alumina cement, 24-45 parts by weight of calcium hydroxide binder material composed of blast furnace slag, 30-45 parts by weight of silicon oxide (SIO2), 0.5-1.0 parts by weight of polymer resin, 4-33 parts by weight of potassium hydroxide (KOH), 0.1-3 parts by weight of silica fume, 0.1-3 parts by weight of a defoaming agent, and 5-10 parts by weight of silica aerogel, thereby preventing the penetration of harmful components such as hydrogen sulfide, sulfite, and corrosion gas, carbon dioxide, and moisture, which cause the durability of the concrete of the water collection pipeline to decrease and corrode, and in addition, the strength, durability, and acid resistance of the concrete section of the water collection pipeline filled with the sectional repair mortar composition for a water collection pipeline thus prepared are excellent, and in a harsh environment, concrete corrosion caused by chemical attack of the concrete can be prevented, so that repeated repair work is not required, and repair work costs can be reduced.

[0014] Various embodiments of the present invention aim to provide a sectional repair mortar composition for a catch basin and a concrete sectional repair reinforcement method using the same, remove a concrete deterioration portion of a concrete surface of a catch basin, remove reinforcement corrosion, perform rust treatment on the reinforcement using a high-pressure water washing and a rust-proof material, and repair a section of the concrete of the catch basin using the sectional repair mortar composition for a catch basin prepared as above, apply a new adhesive, and apply a protective coating material, thereby providing excellent durability against acid, salt damage, and the like of the concrete of the catch basin.

[0015] (II) TECHNICAL SOLUTION

[0016] According to various embodiments of the present invention, the sectional repair mortar composition for a catch basin can be prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of silica aerogel.

[0017] According to various embodiments of the present invention, the concrete sectional repair reinforcement method using the sectional repair mortar composition for a catch basin can include the steps of removing a concrete deterioration portion of a catch basin, removing reinforcement corrosion provided inside a concrete of the catch basin, washing a concrete surface of the catch basin using a high-pressure water, performing rust treatment on the reinforcement using a rust-proof material, repairing a section of the concrete of the catch basin using a sectional repair mortar composition for a catch basin, wherein the sectional repair mortar composition for a catch basin is prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of silica aerogel, applying a new adhesive to the concrete surface of the catch basin, and applying a protective coating material to the concrete surface of the catch basin.

[0018] According to various embodiments of the present invention, in the step of removing a concrete deterioration portion of a catch basin, the deterioration portion can be completely removed using a rock drill and a crusher, and the like.

[0019] According to various embodiments of the present invention, in the step of removing reinforcement corrosion provided inside a concrete of a catch basin, the reinforcement corrosion can be removed using a brush and a sander, and the like.

[0020] According to various embodiments of the present application, in the step of cleaning the concrete surface of the catchment pipeline with high-pressure water, foreign substances on the concrete surface of the catchment pipeline can be removed using high-pressure water sprayed from a high-pressure water cleaning machine.

[0021] According to various embodiments of the present application, in the step of rust-proof treating the reinforcing bar using a rust-proof material, the rust-proof material can be prepared by mixing 20 to 40 wt% of ceramic, 25 to 40 wt% of an acrylic-based emulsion, and 15 to 25 wt% of silica aerogel.

[0022] According to various embodiments of the present application, in the step of repairing the section of the concrete of the catchment pipeline using a catchment pipeline section repair mortar composition, the section thickness of the catchment pipeline section repair mortar composition can be formed to be 10 mm.

[0023] According to various embodiments of the present application, in the step of applying a new adhesive to the concrete surface of the catchment pipeline, the new adhesive can be uniformly applied to the concrete surface of the catchment pipeline using a brush, a sprayer, and a roller, and the new adhesive can be applied at an application amount of 0.36 kg / m 2 .

[0024] According to various embodiments of the present application, in the step of applying a protective coating material to the concrete surface of the catchment pipeline, the protective coating material can include a top coat, and the protective coating material can be secondarily uniformly applied to the concrete surface of the catchment pipeline using a brush, a sprayer, and a roller, and the protective coating material can be secondarily applied after the protective coating material is dried by being touched by an operator.

[0025] According to various embodiments of the present application, the protective coating material can be prepared by mixing 25 to 30 wt% of a silicate, 40 to 60 wt% of a mineral powder emitting far infrared rays, 10 to 20 wt% of an epoxy resin as an adhesive, and 2 to 5 wt% of a hardener.

[0026] (III) Advantageous Effects

[0027] According to various embodiments of the present application, a cross-section repair mortar composition for a catchment pipeline is prepared by mixing 30 to 50 parts by weight of a Portland cement, 10 to 20 parts by weight of an alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of a blast furnace slag, 30 to 45 parts by weight of a silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of a potassium hydroxide (KOH), 0.1 to 3 parts by weight of a silica fume, 0.1 to 3 parts by weight of an antifoaming agent, and 5 to 10 parts by weight of a silica aerogel, removing a concrete deterioration portion of a concrete surface of the catchment pipeline, removing a reinforcement corrosion, performing a rustproof treatment on the reinforcement after washing the same with a high-pressure water, and repairing a cross-section of the concrete of the catchment pipeline using the cross-section repair mortar composition for a catchment pipeline prepared as above, applying a new binder, and applying a protective coating material, so that penetration of harmful components (such as hydrogen sulfide, sulfite, and a corrosion gas), carbon dioxide, and moisture, etc. which cause durability reduction and corrosion of the concrete of the catchment pipeline can be prevented, and thus not only the compressive strength, the flexural strength, and the adhesive strength of the concrete of the catchment pipeline can be improved, but also the chemical resistance, the impact resistance, and the pollution resistance of the concrete of the catchment pipeline can be improved. In addition, by improving the adhesive force of the concrete of the catchment pipeline, damage such as cracking and peeling after repair and reinforcement work of the concrete of the catchment pipeline can be prevented. Thus, the durability of the concrete of the catchment pipeline can be ensured, and the life of the concrete of the catchment pipeline can be extended.

[0028] Thus, repeated repair work of the concrete of the catchment pipeline can be prevented, and thus the repair and reinforcement cost of the concrete of the catchment pipeline can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a cross-sectional view of a cross-section of a concrete repaired using a cross-section repair mortar composition for a catchment pipeline according to various embodiments of the present application.

[0030] Figure 2 is a process flow diagram of a concrete cross-section repair and reinforcement method using a cross-section repair mortar composition for a catchment pipeline according to various embodiments of the present application.

[0031] REFERENCE NUMERALS

[0032] 10: Concrete of a catchment pipeline 11: Reinforcement

[0033] 12: Reinforcement rustproof material 13: Cross-section repair mortar composition for a catchment pipeline

[0034] 14: New binder 15: Protective coating material DETAILED DESCRIPTION

[0035] The present application can be modified variously and can have multiple embodiments, some of which will be described in detail with reference to the accompanying drawings. However, this does not mean that the present application is limited to any particular embodiment, but should be understood to include all modifications, equivalents, or alternatives within the spirit and technical scope of the present application.

[0036] Terms including ordinal numbers such as "first", "second", etc. can be used to explain various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another component. For example, a first component can be named a second component, and likewise, a second component can be named a first component without departing from the scope of the present application. The term "and / or" includes a combination of a plurality of related recitations or any one of the plurality of related recitations.

[0037] In addition, terms such as "front", "rear", "top", "bottom" described in view of the drawings can be replaced with ordinal numbers such as "first", "second". The order of ordinal numbers such as "first", "second", etc. does not refer to the order mentioned or any order, and can be arbitrarily changed as needed.

[0038] The terms used in the present application are used only to explain specific embodiments, and are not used to limit the present application. Unless the context clearly indicates otherwise, singular expressions include plural expressions. In the present application, the term "include" or "have" or the like is intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and does not preclude the possibility of existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0039] Unless otherwise defined, all terms used herein, including technical terms or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains. Terms such as defined in a generally used dictionary should be interpreted as having a meaning consistent with the meaning in the context of related technology, and should not be interpreted ideally or overly formally unless clearly defined in the present application.

[0040] The cross-section repair mortar composition 13 for a water collection pipe according to various embodiments of the present application is prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of silica aerogel, thereby not only preventing the occurrence of deterioration and salt damage that cause a decrease in durability and corrosion of the concrete 10 of the water collection pipe, and preventing the occurrence of penetration of harmful components such as hydrogen sulfide, sulfites, and corrosion gases, carbon dioxide, and moisture, but also preventing corrosion of the concrete, thereby being one of various devices or a combination of a plurality of devices in which the compressive strength, the flexural strength, and the adhesive strength of the concrete 10 of the water collection pipe are excellent and the chemical resistance, the impact resistance, and the pollution resistance are excellent.

[0041] Figure 1 is a cross-sectional view showing repair of a cross-section of the concrete 10 of the water collection pipe using the cross-section repair mortar composition 13 according to various embodiments of the present application, Figure 2 is a process flow diagram of a cross-section repair reinforcement method of the concrete 10 of the water collection pipe using the cross-section repair mortar composition 13 according to various embodiments of the present application.

[0042] Referring to Figure 1 , for the repair work of the water collection pipe according to one embodiment of the present application, a water blocking device is installed in a portion of the water collection pipe to block the flow of sewage in the drainage facility through an abnormal terrain, and another water blocking device is installed at a distance from the water blocking device to provide a section in which sewage does not flow in the water collection pipe, and a bypass pipe is provided to have one end inserted into a manhole upstream of the water collection pipe and the other end inserted into a manhole through the water blocking device to bypass the section in which sewage does not flow, and sewage is drained to the ground by driving a pump installed in the bypass pipe, and the sewage is supplied to the water collection pipe after the area in which the water blocking device is installed.

[0043] The sewage and foreign matter in the area of the water collection pipe in which the water blocking device is installed are removed, and in this state, the repair work can be performed on the concrete 10 of the area.

[0044] First, a concrete deterioration portion occurring in the concrete 10 of the water collection pipe can be removed. For example, the deterioration area can be completely removed using a rock drill and a crusher, that is, the deterioration area can be removed by a concrete grinding work using a rock drill and a crusher.

[0045] Then, the reinforcement 11 inside the concrete 10 of the water collecting pipe provided at the deteriorated portion can be cleaned of corrosion. For example, the reinforcement corrosion portion of the reinforcement 11 can be completely cleaned using a brush, a sander, or the like.

[0046] Then, the reinforcement 11 cleaned of the reinforcement corrosion can be washed with high-pressure water.

[0047] For example, the concrete 10 surface of the water collecting pipe and the reinforcement 11 can be completely cleaned of foreign matter using high-pressure water sprayed from a high-pressure water washing machine (not shown).

[0048] In this state, the reinforcement 11 can be subjected to rustproof treatment using a rustproof material 12. For example, the rustproof material 12 can be prepared by mixing 20 to 40 wt% of ceramic, 25 to 40 wt% of an acrylic-based emulsion, and 15 to 25 wt% of silica aerogel. The rustproof material 12 thus prepared can be uniformly applied to the reinforcement 11 using a brush (not shown).

[0049] Then, the concrete 10 section of the water collecting pipe can be filled with a water collecting pipe section repair mortar composition 13 prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of silica aerogel.

[0050] That is, the water collecting pipe section repair mortar composition 13 can be filled in the section of the concrete 10 of the water collecting pipe. At this time, the concrete 10 section of the water collecting pipe can be repaired using the composition 13.

[0051] The thickness of the composition 13 can be formed to be 10 mm or more when the composition 13 is filled at one time.

[0052] Then, a new adhesive 14 can be applied to the surface of the concrete 10 of the water collecting pipe repaired using the composition 13.

[0053] The new adhesive 14 can be uniformly applied to the surface of the concrete 10 of the water collecting pipe at a second time using a brush, a sprayer, and a roller.

[0054] The new adhesive 14 can be applied at an application amount of 0.36 kg / m 2 , that is, the average application amount of the new adhesive 14 at one time can be 0.18 kg / m 2 .

[0055] Then, a protective coating material 15 is applied to the surface of the concrete 10 of the water collecting pipe to which the new adhesive 14 has been applied.

[0056] The protective coating material 15 can include a top coat. For example, the protective coating material 15 can be uniformly applied to the surface of the concrete 10 of the water collecting pipe a second time using a brush, a sprayer, and a roller after being applied a first time.

[0057] The protective coating material 15 can be applied a second time after being dried by an operator confirming the drying by hand after being applied a first time.

[0058] The protective coating material can be prepared by mixing 25 to 30 weight percent of a silicate, 40 to 60 weight percent of a far infrared ray emitting mineral powder, 10 to 20 weight percent of an epoxy resin as an adhesive, and 2 to 5 weight percent of a hardening agent.

[0059] As described above, by filling the water collecting pipe with the cross section repair mortar composition 13 for a water collecting pipe prepared by mixing 30 to 50 parts by weight of a silicate cement, 10 to 20 parts by weight of an alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of a blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of a silica aerogel to the surface of the concrete 10 of the water collecting pipe, penetration of harmful ingredients, carbon dioxide, moisture, and the like that cause deterioration of the durability of the concrete 10 of the water collecting pipe can be prevented, and thus not only the compressive strength, the bending strength, and the adhesive strength of the concrete 10 of the water collecting pipe can be improved, but also the chemical resistance, the impact resistance, and the pollution resistance of the concrete 10 of the water collecting pipe can be improved. In addition, by improving the adhesive force of the concrete 10 of the water collecting pipe, damage such as cracking and peeling can be prevented after repair and reinforcement work on the concrete 10 of the water collecting pipe. Thus, the durability of the concrete 10 of the water collecting pipe can be ensured, and the lifespan of the concrete 10 of the water collecting pipe can be extended.

[0060] The concrete cross section repair and reinforcement method using the cross section repair mortar composition 13 for a water collecting pipe according to various embodiments of the present application is as follows.

[0061] First, referring to Figure 2 The deteriorated portion (not shown) formed in the concrete 10 of the water collecting pipe can be removed (S1).

[0062] The deteriorated portion can be completely removed using a rock drill and a crusher, and the like.

[0063] Then, the reinforcement 11 provided inside the concrete 10 of the catch pipe can be cleaned of corrosion (S2).

[0064] The reinforcement 11 can be cleaned of corrosion using a brush, a sander, or the like.

[0065] Then, the surface of the concrete 10 of the catch pipe can be washed with high-pressure water (S3).

[0066] At this time, the surface of the concrete 10 of the catch pipe can be cleaned of foreign matter using high-pressure water sprayed from a high-pressure water washing machine (not shown).

[0067] Then, the reinforcement 11 can be subjected to rustproof treatment using a rustproof material 12 (S4).

[0068] Here, the rustproof material 12 can be prepared by mixing 20 to 40 wt% of ceramic, 25 to 40 wt% of an acrylic-based emulsion, and 15 to 25 wt% of silica aerogel.

[0069] Then, the cross section of the concrete 10 of the catch pipe can be repaired using a catch pipe cross section repair mortar composition 13 (S5), wherein the catch pipe cross section repair mortar composition 13 is prepared by mixing 30 to 50 parts by weight of Portland cement, 10 to 20 parts by weight of alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of silica aerogel.

[0070] For example, the repair can be performed by filling the composition 13 in the cross section of the concrete 10 of the catch pipe.

[0071] The cross section thickness of the catch pipe cross section repair mortar composition 13 can be formed to be 10 mm.

[0072] In this state, a new adhesive 14 can be applied to the surface of the concrete 10 of the catch pipe in which the composition 13 has been filled (S6).

[0073] The new adhesive 14 can be uniformly applied to the surface of the concrete 10 of the catch pipe using a brush, a sprayer, a roller, or the like. That is, the new adhesive 14 can be applied at an application amount of 0.36 kg / m 2 .

[0074] Then, a protective coating material 15 can be applied to the surface of the concrete 10 of the catch pipe (S7).

[0075] For example, the protective coating material 15 can include a top coat. The protective coating material 15 can be uniformly applied to the surface of the concrete 10 of the catch pipe using a brush, a sprayer, and a roller, i.e., the protective coating material 15 can be applied twice after being dried by hand touch of an operator after first application.

[0076] The protective coating material can be prepared by mixing 25 to 30 wt% of a silicate, 40 to 60 wt% of a far-infrared ray emitting mineral powder, 10 to 20 wt% of an epoxy resin as a binder, and 2 to 5 wt% of a hardening agent.

[0077] As described above, the concrete 10 of the catch pipe, which has undergone the steps of removing a deteriorated portion of the concrete from the surface of the concrete 10 of the catch pipe, removing corrosion of the reinforcing bar 11, performing rust-proof treatment of the reinforcing bar 11 using the rust-proof material 12, repairing the cross section of the concrete 10 of the catch pipe using the catch pipe cross section repair mortar composition 13, and applying a new binder 14, and finally applying the protective coating material 15, can be easily repaired and reinforced under severe environmental conditions such as a composite gas and a water hammer, can improve the physical and chemical properties of the composition 13 such as strength improvement, chemical resistance, shrinkage and cracking inhibition, resistance to impact / breakage, resistance to abrasion / erosion, freeze-thaw resistance, rebound amount, etc. while stably securing the adhesion between the concrete 10 of the catch pipe and the composition 13, and thus can improve the quality of the cross section repair and reinforcement work of the concrete 10 of the catch pipe.

[0078] In addition, since the concrete of the catch pipe does not need to be repeatedly repaired and reinforced, the repair and reinforcement cost of the concrete of the catch pipe can be reduced.

[0079] Hereinafter, an embodiment of the catch pipe cross section repair mortar composition according to the present application will be described in more detail, and the present application is not limited to the following embodiment.

[0080] <Embodiment 1>

[0081] The catch pipe cross section repair mortar composition is prepared by mixing 30 to 50 parts by weight of a silicate cement, 10 to 20 parts by weight of an alumina cement, 24 to 45 parts by weight of a calcium hydroxide binding material composed of blast furnace slag, 30 to 45 parts by weight of silicon oxide (SiO2), 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of potassium hydroxide (KOH), 0.1 to 3 parts by weight of silica fume, 0.1 to 3 parts by weight of a defoaming agent, and 5 to 10 parts by weight of a silica aerogel.

[0082] In order to more easily grasp the characteristics of the above-described Example 1, some comparative examples which can be compared with the inventive example are suggested, and Comparative Example 1 and Comparative Example 2 which will be described later suggest a general cement mortar composition and a polymer cement mortar composition which are commonly used at present.

[0083] <Comparative Example 1>

[0084] The general cement mortar composition can be prepared by mixing 40 parts by weight of a general cement, 50 parts by weight of a crushed stone, and 10 parts by weight of water.

[0085] <Comparative Example 2>.

[0086] The polymer cement mortar composition can be prepared by pre-mixing 40 parts by weight of a general cement, 50 parts by weight of a crushed stone, and 40 parts by weight of a polyacrylate with a vacuum-type forced stirrer, adding 6 parts by weight of water, and mixing with a forced stirrer for 2 minutes.

[0087] The following Test Example shows experimental results for comparing the characteristics of the inventive example with those of Comparative Example 1 and Comparative Example 2 in order to more easily grasp the characteristics of the cross-section repair mortar composition for a water collection pipe according to Example 1 of the present invention.

[0088] <Test Example 1>

[0089] In order to compare the physical characteristics of the cross-section repair mortar composition for a water collection pipe prepared according to Example 1 with those of the cement mortar compositions prepared according to the comparative examples, tests for compression strength, bending strength, tensile strength, and adhesion strength were performed on the cross-section repair mortar composition for a water collection pipe prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 according to KS F 2476 (Test method for polymer cement mortar), and the results are shown in Table 1 below.

[0090] [Table 1]

[0091]

[0092] As shown in Table 1 above, it can be known that the compression strength, the bending strength, the tensile strength, and the adhesion strength of the cross-section repair mortar composition for a water collection pipe prepared according to Example 1 are significantly higher than those of the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0093] It can be known that the cross-section repair mortar composition for a water collection pipe prepared according to Example 1 is very excellent in strength compared with the cement mortar compositions prepared according to the comparative examples.

[0094] <Test Example 2>

[0095] The length change rates of the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 were measured according to KS F 2476, and the results are shown in Table 2 below.

[0096] [Table 2]

[0097] Test item Test method Example 1 Comparative Example 1 Comparative Example 2 Length change rate (%) KS F 2476 0.01 0.13 0.11

[0098] As shown in Table 2 above, it can be known that the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 has a reduced amount of drying shrinkage, and has a shrinkage reduction effect, as compared with the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0099] [Experimental Example 3]

[0100] The results of the measurement of the water absorption rates of the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 according to the method prescribed in KS F 2476 are shown in Table 3 below. If the water absorption rate is high, impurities or water penetrate the inside of concrete, and the porosity of the inside of concrete increases, thereby causing damage to a structural member.

[0101] [Table 3]

[0102] Distinguish Test method Example 1 Comparative Example 1 Comparative Example 2 Absorption rate (%) KS F 2476 0.2 2.7 1.8

[0103] As shown in Table 3 above, it can be known that the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 has a low water absorption rate, as compared with the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0104] [Experimental Example 4]

[0105] Chloride ion penetration depth tests were performed on the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 according to KS F 2476, and the results are shown in Table 4 below.

[0106] [Table 4]

[0107] Test item Test method Example 1 Comparative Example 1 Comparative Example 2 Chloride ion penetration depth (mm) KS F 2476 0.6 2.5 1.5

[0108] As shown in Table 4 above, it can be known that the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 has a small chloride ion penetration depth and a high resistance to salt damage, as compared with the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0109] [Experimental Example 5]

[0110] A neutralization depth test was performed on the cement mortar composition for repairing a catchment pipeline prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 according to KS F 2476, and the results are shown in Table 5 below.

[0111] [Table 5]

[0112] Test item Test method Example 1 Comparative Example 1 Comparative Example 2 Neutralization depth (mm) KS F 2476 0.2 1.5 1.2

[0113] As shown in Table 5 above, it can be known that the cross-section repair mortar composition for a catchment pipeline prepared according to Example 1 has a smaller neutralization penetration depth and a higher resistance to neutralization than the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0114] [TEST EXAMPLE 6]

[0115] The cross-section repair mortar composition for a catchment pipeline prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 were subjected to a chemical resistance test according to Japanese Industrial Standard Draft [Test Method for Chemical Resistance by Solution Immersion of Concrete] using 2% hydrochloric acid, 5% sulfuric acid, and 45% sodium hydroxide aqueous solutions as test solutions, and immersing the test bodies for 28 days, and the measurement results are shown in Table 6 below.

[0116] [Table 6]

[0117]

[0118] As shown in Table 6 above, it can be known that the cross-section repair mortar composition for a catchment pipeline prepared according to Example 1 has a smaller weight change rate for chemical resistance and a higher chemical resistance than the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2.

[0119] [TEST EXAMPLE 7]

[0120] A freeze-thaw resistance test was performed on the cross-section repair mortar composition for a catchment pipeline prepared according to Example 1 and the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 according to the method specified in KSF 2456, and the measurement results are shown in Table 7 below. Freeze-thaw refers to freezing and thawing of water absorbed in the capillary channels of concrete, and repeated freeze-thaw can cause microcracking in the concrete structure, thereby reducing durability. Table 7 shows the durability index of the examples and comparative examples according to the freeze-thaw resistance test.

[0121] [Table 7]

[0122] Distinguish Test method Example 1 Comparative Example 1 Comparative Example 2 Durability index KS F 2476 94 69 89

[0123] As shown in Table 7 above, it can be known that the cross-section repair mortar composition for a water collecting pipe prepared according to Example 1 has a significantly high durability index and improved durability compared to the cement mortar compositions prepared according to Comparative Examples 1 and 2.

[0124] The cross-section repair mortar composition for a water collecting pipe and the concrete cross-section repair reinforcing method using the same according to various embodiments of the present application described above are not limited to the above-described embodiments and drawings, and it will be obvious to those skilled in the art to which the present application pertains that various substitutions, modifications and changes can be made within the technical scope of the present application.

Claims

1. A sectional repair mortar composition for a water collecting pipe, characterized in that, the sectional repair mortar composition for a water collecting pipe is prepared by mixing 30 to 50 parts by weight of a Portland cement, 10 to 20 parts by weight of an alumina cement, 24 to 45 parts by weight of a calcium hydroxide bonding material composed of a blast furnace slag, 30 to 45 parts by weight of a silicon oxide, 0.5 to 1.0 parts by weight of a polymer resin, 4 to 33 parts by weight of a potassium hydroxide, 0.1 to 3 parts by weight of a silica fume, 0.1 to 3 parts by weight of an antifoaming agent, and 5 to 10 parts by weight of a silica aerogel.

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