Repair material

Abstract

To provide a repair material capable of enhancing usability of the repair material.SOLUTION: A repair material 30 for repairing a construction member 1 comprises: a fine aggregate; a resin material; water; and a binder for binding the fine aggregate, resin material, and water, wherein the fine aggregate comprises a low water-absorbing fine aggregate having relatively low water absorbency and a water content of the repair material 30 is set as about 10.7% to 16.7 wt.%. The low water-absorbing fine aggregate comprises river sand, mountain sand, silica sand, limestone, and / or blast furnace slag, wherein a content of fine aggregate having a grain size of 0.6 mm or less to the binder material is set as about 100 wt.% to 200 wt.%.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a repair material.

Background Art

[0002] Conventionally, as one of the repair materials for repairing the floor materials constituting a building, a repair material containing fine aggregate, a polymer for cement, and water has been proposed (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, in the above conventional repair material, although it contains water as described above, the details of setting the water content rate of water with respect to the repair material are not disclosed. Therefore, for example, when the water content rate is relatively high, the shrinkage amount of the repair material increases, and when the water content rate is relatively low, there is a possibility that the fluidity of the repair material decreases. Thus, there is room for improvement from the viewpoint of enhancing the usability of the repair material.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a repair material capable of enhancing the usability of the repair material.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, the repair material according to claim 1 is a repair material for repairing a construction member, and includes fine aggregate, a resin material, water, and a binder for binding the fine aggregate, the resin material, and the water. The fine aggregate Includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag. the water content rate of the water with respect to the repair material is from 10.7% by weight to 16.7% by weight %anddeath, The content of fine aggregate with a particle size of 0.6 mm or less in the binder is 100% to 200% by weight, the resin material contains an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer, the content of the resin material in relation to the binder is 5% to 20% by weight, the binder is composed of Portland cement, alumina cement, gypsum, blast furnace slag fine powder, and an expansive agent, the content of Portland cement in the binder is 40% to 60% by weight, the content of alumina cement in the binder is 10% to 20% by weight, the content of gypsum in the binder is 1% to 10% by weight, the content of blast furnace slag fine powder in the binder is 10% to 20% by weight, and the content of the expansive agent in the binder is 1% to 10% by weight.

[0007] The repair material described in claim 2 is the repair material described in claim 1, The aforementioned construction members include floor slab material and / or floor tile material. [Effects of the Invention]

[0012] According to the repair material described in claim 1, the fine aggregate is Includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag. The water content of the repair material was changed from 10.7% by weight to 16.7% by weight. %and Therefore, while ensuring the fluidity of the repair material, it is possible to reduce the amount of shrinkage of the repair material and increase the strength of the repaired area formed by the repair material (specifically, peel strength, surface adhesion strength, dynamic load resistance, and compressive strength, etc.), thereby improving the usability of the repair material. Furthermore, by setting the content of fine aggregate with a particle size of 0.6 mm or less in the binder to approximately 100% to 200% by weight, it becomes easier to form the repaired area with the repair material in a thin film form, thus reducing the amount of repair material used when forming the repair material. Furthermore, since the resin material contains an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer, it is easier to ensure the strength of the repaired area formed by the repair material compared to other resin materials, thereby improving the usability of the repaired area. Furthermore, by setting the resin content in the binder to approximately 5% to 20% by weight, it becomes easier to ensure the strength of the repaired area formed by the repair material compared to other content ratios, thereby improving the usability of the repaired area.

[0013] According to the repair material described in claim 2, Since the construction components include floor slab material and / or floor tile material, it is easy to form the desired repair material in the defective parts of the floor slab material and / or floor tile material, thereby further improving the usability of the repair material. [Brief explanation of the drawing]

[0018] [Figure 1] This figure conceptually shows a construction member according to an embodiment of the present invention, where (a) is a plan view and (b) is a cross-sectional view taken along the line AA in (a). [Figure 2] This diagram shows the detailed composition of the repair material used in the moisture content confirmation test. [Figure 3] This figure shows the results of the moisture content confirmation test. [Figure 4] This diagram shows the detailed composition of the repair material used in the first resin material type identification test. [Figure 5] This figure shows the test results of the first resin material type identification test. [Figure 6] This diagram shows the detailed composition of the repair material used in the second resin material type identification test. [Figure 7] This figure shows the test results of the second resin material type identification test. [Figure 8]It is a figure showing the details of the composition of the repair material used in the resin material content confirmation test. [Figure 9] It is a figure showing the test results of the resin material content confirmation test.

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the repair material according to the present invention will be described in detail with reference to the accompanying drawings. First, after explaining the basic concept of [I] the embodiment, [II] the specific content of the embodiment will be described, and finally, [III] modifications to the embodiment will be described. However, the present invention is not limited by the embodiments.

[0020] 〔I〕Basic Concept of the Embodiment First, the basic concept of the embodiment will be explained. The embodiment generally relates to a repair material for repairing construction members.

[0021] Here, "construction member" means a member constituting a structure, and includes, for example, concepts such as wall materials, ceiling materials, floor materials, column materials, beam materials, etc. In the embodiment, it will be described as a floor slab material.

[0022] Also, the specific structure and type of the "structure" are arbitrary, and include, for example, building structures (as an example, single-family houses, apartment houses such as apartments and condominiums, office buildings, commercial facilities, etc.) and civil engineering structures (as an example, bridges, tunnels, dams, etc.). In the embodiment, it will be described as an existing office building.

[0023] Also, "repairing a construction member" includes, for example, concepts such as suppressing or avoiding the progress of deterioration of a deteriorated construction member, restoring the function of a deteriorated construction member, smoothing the defective part of a construction member, and / or adjusting the finish of the surface of a construction member.

[0024] 〔II〕Specific Content of the Embodiment [[ID=�5]]Next, the specific content of the embodiment will be described.

[0025] (composition) First, the configuration of the repair material 30 according to the embodiment and the configuration of the construction member 1 to be repaired by the repair material 30 will be described.

[0026] (Structure - Construction components) First, let's explain the composition of construction component 1.

[0027] In the following explanation, the X direction in Figure 1 is referred to as the left-right direction of construction member 1 (-X direction is the left direction of construction member 1, and +X direction is the right direction of construction member 1), the Y direction in Figure 1 is referred to as the front-back direction of construction member 1 (+Y direction is the front direction of construction member 1, and -Y direction is the rear direction of construction member 1), and the Z direction in Figure 1 is referred to as the up-down direction of construction member 1 (+Z direction is the up direction of construction member 1, and -Z direction is the down direction of construction member 1).

[0028] Construction member 1 is a component of a structure (not shown) (specifically, an existing office building). This construction member 1 is constructed using, for example, a known floor slab material (for example, a concrete floor slab material that is roughly flat) and is installed on a predetermined floor of the structure. Specifically, construction member 1 is installed roughly horizontally and is connected to other adjacent construction members (for example, columns, beams, etc.).

[0029] Furthermore, as shown in Figure 1, the construction member 1 is provided with a defective portion 10 and a repaired portion 20.

[0030] (Structure - Construction components - Damaged parts) The missing portion 10 is a part of the construction member 1 that has been lost due to deterioration associated with the use of the construction member 1. As shown in Figure 1, this missing portion 10 is formed in a substantially concave shape on the upper surface of the construction member 1, and specifically, the depth (length in the vertical direction) of the missing portion 10 is approximately 5 mm or less (or greater than 5 mm).

[0031] (Structure - Construction components - Repair parts) The repaired section 20 is formed when the damaged section 10 is repaired with the repair material 30. As shown in Figure 1, the repaired section 20 is formed by applying the repair material 30 to the entire damaged section 10 using the repair method described later, and then allowing it to dry.

[0032] Such a repair section 20 makes it possible to suppress the progression of deterioration of the construction member 1 and to restore the function of the construction member 1.

[0033] (Composition - Repair materials) Next, the composition of the repair material 30 will be described.

[0034] The repair material 30 is for repairing the construction member 1. In this embodiment, the repair material 30 is configured to have a self-leveling function (a function that allows the repair material 30 poured into the defective part 10 to naturally become horizontal), and specifically consists of fine aggregate, resin material, water, and a binder (all of which are not shown).

[0035] (Composition - Repair material - Fine aggregate) The fine aggregate is part of the basic structure of the repair material 30 and is composed of first fine aggregate and second fine aggregate.

[0036] (Composition - Repair material - Fine aggregate - First fine aggregate) The first fine aggregate is part of the basic structure of the fine aggregate and is a low-water-absorbent fine aggregate with relatively low water absorption. This first fine aggregate is composed of, for example, known fine aggregates, and specifically, from the viewpoint of the manufacturability of the first fine aggregate, it is composed of river sand, mountain sand, silica sand, limestone, and / or blast furnace slag.

[0037] This type of first fine aggregate allows for easy construction of the first fine aggregate, thereby improving its manufacturability.

[0038] (Composition - Repair material - Fine aggregate - Second fine aggregate) The second fine aggregate is another part of the basic structure of the fine aggregate and is a different type of aggregate from the first fine aggregate. This second fine aggregate is composed of, for example, known fine aggregates, and specifically includes sands, inorganic materials (for example, alumina clinker, silica powder, clay minerals, waste FCC catalyst, or / and limestone), or / and resin pulverized materials (for example, urethane pulverized, EVA foam, or / and foamed resin).

[0039] (Composition - Repair material - Fine aggregate - Other components) Furthermore, while the specific composition of the fine aggregate (specifically, the first fine aggregate and the second fine aggregate) is arbitrary, in this embodiment it is configured as follows.

[0040] In other words, the particle size of the fine aggregate is set to a size that allows the repair material 30 to have a self-leveling function. More specifically, the particle size is set to 2 mm or less, and as an example, it is preferable to set the particle size to 0.6 mm or less.

[0041] This makes it easier to ensure the self-leveling function of the repair material 30.

[0042] However, this is not the only option; for example, the particle size may be set to be greater than 2 mm.

[0043] Furthermore, the amount of fine aggregate is set to a level that facilitates the formation of the repaired section 20 as a thin film. More specifically, the amount of fine aggregate with a particle size of 0.6 mm or less relative to the binder is set to approximately 100% to 200% by weight.

[0044] This makes it easier to form the repaired portion 20, which is formed by the repair material 30, into a thin film, and thus, for example, the amount of repair material 30 used when forming the repair material 30 can be reduced.

[0045] However, this is not limited to this; for example, the content of fine aggregate with a particle size of 0.6 mm or less relative to the binder may be set to less than approximately 100% by weight, or to more than approximately 200% by weight.

[0046] (Composition - Repair material - Resin material) The resin material is another part of the basic structure of the repair material 30 and is intended to suppress the drying out of the repair material 30 (failure to cure the repair material 30).

[0047] The specific composition of this resin material is arbitrary, but in this embodiment, it is configured as follows.

[0048] In other words, the type of resin material is composed of an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer, based on the test results described later.

[0049] As a result, it becomes easier to ensure the strength of the repaired part 20 formed by the repair material 30 (specifically, peel strength, surface adhesion strength, dynamic load resistance, and compressive strength, etc.) compared to other resin materials, thereby improving the usability of the repaired part 20.

[0050] However, the material is not limited to these, and may also include, for example, a re-emulsifying powder resin of ethylene vinyl acetate copolymer, a vinyl acetate / vinyl versatate / acrylic acid ester copolymer, or vinyl chloride.

[0051] Furthermore, regarding the resin content, based on the test results described later, the resin content relative to the binder is set to approximately 5% to 20% by weight, and more specifically, it is preferable to set it to approximately 10% by weight.

[0052] This makes it easier to ensure the strength of the repaired part 20 formed by the repair material 30 compared to other materials, thereby improving the usability of the repaired part 20.

[0053] However, this is not limited to this; for example, the resin content relative to the binder may be set to less than approximately 5% by weight, or to more than approximately 20% by weight.

[0054] (Composition - Repair material - Water) Water is another part of the basic structure of the repair material 30 and is intended to ensure the self-leveling function of the repair material 30 (mainly the fluidity of the repair material 30), and is composed of, for example, known water (for example, tap water, fresh water).

[0055] Furthermore, while the method for setting the water content of the repair material 30 is arbitrary, in this embodiment, it is set to approximately 10.7% by weight to 16.7% by weight based on the test results described later, and specifically, it is preferable to set it to approximately 14.5% by weight.

[0056] This makes it possible to maintain the fluidity of the repair material 30, reduce the amount of shrinkage of the repair material 30, and increase the strength of the repaired area formed by the repair material 30 (specifically, peel strength, surface adhesion strength, dynamic load resistance, and compressive strength, etc.), thereby improving the usability of the repair material 30.

[0057] (Composition - Repair material - Bonding material) The binder is another part of the basic structure of the repair material 30 and is used to bind the fine aggregate, resin material, and water. This binder is composed of, for example, known binders, and specifically includes Portland cement, alumina cement, gypsum, blast furnace slag powder, and an expansive agent. However, it is not limited to these and may further include other materials (for example, calcium aluminates, calcium aluminoferrites, calcium silicates, and / or minerals).

[0058] Furthermore, while the method for setting the content of the various materials constituting the binder is arbitrary, in this embodiment it is set as follows.

[0059] Specifically, from the perspective of ensuring the self-leveling function of the repair material 30, the content of Portland cement in the binder is set to approximately 40% to 60% by weight. The content of alumina cement in the binder is set to approximately 10% to 20% by weight. The content of gypsum in the binder is set to approximately 1% to 10% by weight. The content of blast furnace slag fine powder in the binder is set to approximately 10% to 20% by weight. The content of expansive agent in the binder is set to approximately 1% to 10% by weight.

[0060] However, this is not limited to these. For example, the content of Portland cement in the binder may be set to less than 40% by weight (or more than approximately 60% by weight). The content of alumina cement in the binder may be set to less than 10% by weight (or more than approximately 20% by weight). The content of gypsum in the binder may be set to less than 1% by weight (or more than approximately 10% by weight). The content of blast furnace slag powder in the binder may be set to less than 10% by weight (or more than approximately 20% by weight). The content of expansive agent in the binder may be set to less than 1% by weight (or more than approximately 10% by weight).

[0061] Because the repair material 30 described above makes it easy to form the desired repair material 30 on the damaged portion 10 of the construction member 1 (specifically, the floor slab material), the usability of the repair material 30 can be improved.

[0062] (Repair methods for construction materials) Next, a method for repairing the construction member 1 according to the embodiment will be described.

[0063] The method for repairing a construction member 1 according to this embodiment is a method for repairing a defective portion 10 of the construction member 1 using a repair material 30, and includes a preparation step, a first forming step, and a second forming step.

[0064] The above repair method is explained assuming that a defect 10 has already been formed in the construction member 1.

[0065] (Repair methods for construction materials - preparation process) First, let's discuss the preparation process.

[0066] The preparation process is a process for preparing the repair material 30 to repair the damaged portion 10 of the construction member 1.

[0067] Specifically, first, a predetermined tool (for example, a cup sander) is used to remove the weak portion of the defective part 10 of the construction member 1. Next, the defective part 10 of the construction member 1 is cleaned using a known cleaning agent. Then, a known primer and / or surface treatment agent is applied to the defective part 10 of the construction member 1 and dried, and this process is repeated at least once (so-called primer treatment).

[0068] However, this is not limited to the above, and one or two of the following steps may be omitted: removing the weak parts, cleaning the defective parts 10 of the construction member 1, or applying and drying the surface treatment agent.

[0069] (Method for repairing construction components - First forming step) Next, the first forming process will be described.

[0070] The first forming step is a step of forming the repair material 30 after (or before) the preparation step.

[0071] Specifically, first, fine aggregate, resin material, water, and binder are placed in a designated container. More specifically, after adding water, a mixture of fine aggregate, resin material, and binder is gradually added. Then, the fine aggregate, resin material, water, and binder placed in the container are kneaded together for a predetermined time (for example, about 3 minutes) using a known mixing device (e.g., a hand mixer) to form the repair material 30.

[0072] (Method for repairing construction components - Second forming process) Next, the second forming process will be explained.

[0073] The second forming step is a step in which a repaired portion 20 is formed on the defective portion 10 of the construction member 1 after the first forming step.

[0074] Specifically, within a predetermined time (for example, within 10 minutes) after the completion of the first forming process, the repair material 30 is applied to the defective part 10 of the construction member 1 to a predetermined thickness and in a substantially smooth manner. Then, the repaired part 20 is formed by curing the repair material 30 for a predetermined period of time until it hardens.

[0075] With the repair method described above, a repaired section 20 can be easily formed on the damaged section 10 of the construction member 1, making it possible to easily repair the damaged section 10.

[0076] (Test results) Next, we will explain the results of various tests conducted by the applicant. Here, we will explain the results of the moisture content confirmation test, the first resin material type confirmation test, the second resin material type confirmation test, and the resin material content confirmation test.

[0077] (Test Results - Moisture Content Confirmation Test - Summary) First, I will explain the overview of the moisture content confirmation test.

[0078] The moisture content confirmation test is a test to confirm the performance of the repair material 30 according to the moisture content of the water in the repair material 30. For details of this moisture content confirmation test, the following peel test, surface adhesion strength test, and scratch test were performed.

[0079] (Test Results - Moisture Content Confirmation Test - Overview - Peel Test) First, the peel test method was carried out as follows, referring to the known 90° peel test (for example, the test method in JIS A 5536:2015).

[0080] Specifically, first, each repair material 30 is applied to the upper surface of the flat base material and allowed to dry. Next, the floor sheet material (flooring material) is attached to the upper surface of the repair material 30 with adhesive and allowed to dry. Then, the floor sheet material is cut to a predetermined size. After that, with the base material placed on a horizontal surface, the floor sheet material is pulled up vertically using a known testing machine, and the load during the pulling is measured as the peel strength, and the fracture locations of the floor material, base material, and / or each repair material 30 are identified.

[0081] (Test Results - Moisture Content Confirmation Test - Overview - Surface Adhesion Strength Test) Furthermore, the surface adhesion strength test was conducted as follows, referring to known surface adhesion strength tests.

[0082] Specifically, first, each repair material 30 is applied to the upper surface of a flat base material and allowed to dry. Next, the attachment of the testing machine is applied to the upper surface of the repair material 30 with adhesive and allowed to dry. Then, after cutting a portion of the edges of the adhesive and the repair material 30, the attachment of the testing machine is lifted upward using the lifting section of the testing machine, and the load during this lifting is measured as the surface adhesive strength.

[0083] (Test Results - Moisture Content Confirmation Test - Overview - Scratch Test) Furthermore, the scratch test method was carried out as follows, referring to known scratch tests.

[0084] Specifically, first, each repair material 30 is applied to the upper surface of a flat base material and allowed to dry. Then, the upper surface of the base material is scratched with a needle with a pressure of 1 kg, and the width of the scratch (i.e., the scratch width) is measured with a known measuring instrument (for example, a crack scale).

[0085] (Test Results - Moisture Content Confirmation Test - Overview - Repair Material) Furthermore, the repair material 30 used in the moisture content confirmation test can be divided into repair material A1 to repair material A5, as shown in Figure 2. These repair materials A1 to A5 are composed of fine aggregate, resin material, water, and binder, similar to the repair material according to the embodiment.

[0086] Of these, the details of the composition of repair material A1 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 8.1% by weight, and water content of water in the repair material = 6.5% by weight.

[0087] Furthermore, the detailed composition of repair material A2 was set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 10.7% by weight.

[0088] Furthermore, the detailed composition of repair material A3 was set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 13% by weight.

[0089] Furthermore, the detailed composition of repair material A4 was set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 14.5% by weight.

[0090] Furthermore, the detailed composition of repair material A5 was set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 16.7% by weight.

[0091] (Test Results - Moisture Content Confirmation Test - Detailed Test Results) Next, we will explain the details of the results of the moisture content confirmation test.

[0092] As shown in Figure 3, the peel test results confirmed that the peel strength from repair material A2 to repair material A5 met the threshold (80N or higher), but the peel strength of repair material A1 did not meet the threshold.

[0093] Furthermore, regarding the surface adhesion strength test results, the surface adhesion strength of repair material A1 to repair material A5 exceeded the threshold (1.5 N / mm²). 2 It was confirmed that the above conditions were met.

[0094] Furthermore, the scratch test results confirmed that the scratch width of repair materials A1 to A5 was 0.4 mm or less.

[0095] From the above, the effectiveness of setting the water content of the repair material 30 to approximately 10.7% by weight to 16.7% by weight was confirmed. Furthermore, from the perspective of the test results of the water content confirmation test and the workability of the repaired part 20, repair material A4 was found to be optimal, and it was confirmed that setting the above water content to 14.5% by weight is optimal. In addition, since the peel strength of repair material A5 (82.53N) is close to the lower limit of the threshold, it was also confirmed that the upper limit of the above water content is approximately 16.7% by weight.

[0096] (Test Results - First Resin Material Type Confirmation Test - Summary) Next, we will explain the outline of the first resin material type identification test.

[0097] The first resin material type confirmation test is a test to confirm the performance of repair materials according to the type of resin material. For the details of this first resin material type confirmation test, peel tests, surface adhesion strength tests, and scratch tests were conducted, similar to the moisture content confirmation test.

[0098] (Test Results - First Resin Material Type Confirmation Test - Overview - Repair Material) Furthermore, the repair materials used in the first resin material type confirmation test can be divided into repair materials B1 to B3, as shown in Figure 4. These repair materials B1 to B3 are composed of fine aggregate, resin material, water, and binder, similar to the repair materials in the embodiment.

[0099] Of these, the details of the composition of repair material B1 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 13% by weight.

[0100] Furthermore, the detailed composition of repair material B2 was set as follows: film thickness of repair material = 3 mm, type of resin material = styrene acrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 13% by weight.

[0101] Furthermore, the details of the composition of repair material B3 were set as follows: film thickness of repair material = 3 mm, type of resin material = vinyl acetate / vinyl versatate / acrylic ester copolymer, resin material content relative to binder = 5% by weight, and water content of water in the repair material = 13% by weight.

[0102] (Test Results - First Resin Material Type Confirmation Test - Detailed Test Results) Next, we will explain the details of the test results for the first resin material type identification test.

[0103] As shown in Figure 5, the peel test results confirmed that the peel strengths of repair materials B1 and B2 met the threshold (80N or higher) and were nearly similar. On the other hand, the peel strength of repair material B3 did not meet the threshold, and the failure location was confirmed to be at the interface between the substrate and repair material B3. In this regard, although the resin content of repair material B3 was lower than that of repair materials B1 and B2, considering that the peel strengths of repair material D2 and repair material D3 in the resin content confirmation test described later were similar, it is thought that the difference in the type of resin material had a major influence.

[0104] Furthermore, regarding the surface adhesion strength test results, the surface adhesion strength of repair material B1 to repair material B3 exceeded the threshold (1.5 N / mm²). 2 It was confirmed that the above conditions were met.

[0105] Furthermore, the scratch test results confirmed that the scratch width of repair materials B1 to B3 was 0.35 mm or less.

[0106] From the above, the effectiveness of forming the resin material with an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer was confirmed.

[0107] (Test Results - Second Resin Material Classification Test - Summary) Next, we will explain the outline of the second resin material type identification test.

[0108] The second resin material type confirmation test is a different test from the first resin material type confirmation test, and is a test to confirm the performance of the repair material according to the type of resin material. For details of this second resin material type confirmation test, the following was carried out by referring to the known caster test (test method of JIS A 1454:2016).

[0109] Specifically, first, each repair material is applied to the top surface of a flat base material and allowed to dry. Then, a vinyl floor sheet is attached to the top surface of each repair material with adhesive. After that, a caster applying a predetermined load (specifically, 2000N) is run over the top surface of the vinyl floor sheet for a predetermined number of cycles (maximum 1500 cycles), and then the vinyl floor sheet is checked for peeling, blistering, lifting, etc.

[0110] (Test Results - Second Resin Material Classification Test - Overview - Repair Material) Furthermore, the repair materials used in the second resin material type confirmation test can be divided into repair material C1 and repair material C2, as shown in Figure 6. These repair materials C1 and C2 are composed of fine aggregate, resin material, water, and a binder, similar to the repair materials in the embodiment.

[0111] Of these, the details of the composition of repair material C1 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 14.5% by weight.

[0112] Furthermore, the detailed composition of repair material C2 was set as follows: film thickness of repair material = 3 mm, type of resin material = styrene acrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 14.5% by weight.

[0113] (Test Results - Second Resin Material Classification Test - Detailed Test Results) Next, we will explain the details of the test results for the second resin material type identification test.

[0114] As shown in Figure 7, although there were approximately 3 to 5 areas of lifting in the vinyl floor sheets attached to the upper surfaces of repair materials C1 and C2, there was no peeling or blistering, and the floor sheets themselves were intact. Therefore, it was confirmed that repair materials C1 and C2 have high (good) dynamic load-bearing capacity and compressive strength.

[0115] From the above, the effectiveness of using acrylic acid ester / methacrylic acid ester copolymer or styrene acrylic acid ester copolymer as the resin material was confirmed.

[0116] (Test Results - Resin Material Content Confirmation Test - Overview) Next, we will explain the outline of the resin material content confirmation test.

[0117] The resin content confirmation test is a test to confirm the performance of the repair material according to the resin content relative to the binder. For the details of this resin content confirmation test, peel tests, surface adhesion strength tests, and scratch tests were conducted, similar to the moisture content confirmation test.

[0118] (Test Results - Resin Content Confirmation Test - Overview - Repair Material) Furthermore, the repair materials used in the resin content confirmation test can be divided into repair materials D1 to D4, as shown in Figure 8. These repair materials D1 to D4 are composed of fine aggregate, resin, water, and a binder, similar to the repair materials in the embodiment.

[0119] Of these, the details of the composition of repair material D1 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 3.5% by weight, and water content of water relative to repair material = 13.8% by weight.

[0120] Furthermore, the details of the composition of repair material D2 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 5% by weight, and water content of water in the repair material = 14.5% by weight.

[0121] Furthermore, the details of the composition of repair material D3 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 10% by weight, and water content of water in the repair material = 14.5% by weight.

[0122] Furthermore, the details of the composition of repair material D4 were set as follows: film thickness of repair material = 3 mm, type of resin material = acrylic ester / methacrylic ester copolymer, resin material content relative to binder = 20% by weight, and water content of water relative to repair material = 14.5% by weight.

[0123] (Test Results - Resin Material Content Confirmation Test - Detailed Test Results) Next, we will explain the details of the test results for the resin content confirmation test.

[0124] As shown in Figure 9, the peel test results confirmed that the peel strength from repair material D2 to repair material D4 met the threshold (80N or higher). Furthermore, it was confirmed that the failure locations of repair material D2 and repair material D4 were at the interface between the substrate and repair material D2 (or repair material D4). On the other hand, it was confirmed that the peel strength of repair material D1 did not meet the threshold.

[0125] Furthermore, regarding the surface adhesion strength test results, the surface adhesion strength of repair material D1 to repair material D4 exceeds the threshold (1.5 N / mm²). 2 It was confirmed that the above conditions were met.

[0126] Furthermore, regarding the scratch test results, while it was confirmed that the scratch width of repair material D1 was 0.3 mm, it was confirmed that the scratch widths of repair materials D2 through D4 exceeded 0.3 mm.

[0127] From the above, it was confirmed that setting the resin content in the binder to approximately 5% to 20% by weight is effective. Furthermore, from the perspective of the fracture location, it was confirmed that using repair material D3 was optimal, and therefore setting the above content to 10% by weight is optimal. In addition, the surface adhesive strength of repair material D4 (1.54 N / mm²) 2 Since the value approximates the threshold, it was also confirmed that the upper limit of the above content is approximately 20% by weight.

[0128] (Effects of the embodiment) As described above, according to this embodiment, the fine aggregate includes low-water-absorbent fine aggregate with relatively low water absorption, and the water content of the repair material 30 is set to approximately 10.7% to 16.7% by weight. This ensures the fluidity of the repair material 30 while reducing the amount of shrinkage of the repair material 30 and increasing the strength of the repaired area formed by the repair material 30 (specifically, peel strength, surface adhesion strength, dynamic load resistance, and compressive strength, etc.), thereby improving the usability of the repair material 30.

[0129] Furthermore, since the low-water-absorbent fine aggregate includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag, the low-water-absorbent fine aggregate can be easily constructed, thereby improving its manufacturability.

[0130] Furthermore, by setting the content of fine aggregate with a particle size of 0.6 mm or less in the binder to approximately 100% to 200% by weight, it becomes easier to form the repaired portion 20 formed by the repair material 30 into a thin film, thus reducing the amount of repair material 30 used when forming the repair material 30.

[0131] Furthermore, since the resin material contains an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer, it is easier to ensure the strength of the repaired part 20 formed by the repair material 30 compared to other resin materials, thereby improving the usability of the repaired part 20.

[0132] Furthermore, by setting the resin content in the binder to approximately 5% to 20% by weight, it becomes easier to ensure the strength of the repaired part 20 formed by the repair material 30 compared to other content levels, thereby improving the usability of the repaired part 20.

[0133] Furthermore, since the construction member 1 includes a floor slab material, it is easier to form the desired repair material 30 in the defective portion 10 of the floor slab material, thereby further improving the usability of the repair material 30.

[0134] [III] Modifications of the Embodiment While embodiments of the present invention have been described above, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of ​​each invention described in the claims. Such modifications will be described below.

[0135] (Regarding the problems to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above. The present invention may solve problems not described above, produce effects not described above, solve only some of the problems described above, or produce only some of the effects described above.

[0136] (Regarding shape, numerical values, structure, and time series) With regard to the components illustrated in the embodiments and drawings, their shapes, numerical values, or the interrelationships of the structure or time series of multiple components can be arbitrarily modified and improved within the scope of the technical concept of the present invention.

[0137] (Regarding construction materials) In this embodiment, the construction member 1 was described as a floor slab material, but it is not limited to this. For example, it may be floor tiles, wall tiles, or concrete wall materials.

[0138] (Regarding fine aggregate) In the embodiment, it was explained that the fine aggregate includes a second fine aggregate, but this is not limited to this, and for example, the second fine aggregate may be omitted.

[0139] (Regarding the binder) In the embodiment, the binder was described as comprising Portland cement, alumina cement, gypsum, blast furnace slag powder, and an expansive agent. However, it is not limited to this, and for example, any of the Portland cement, alumina cement, gypsum, blast furnace slag powder, or expansive agent may be omitted.

[0140] (Regarding repair methods for construction materials) In the embodiment, the method for repairing the construction member 1 was described as including a preparation step and a first forming step, but it is not limited to this. For example, if the defective part 10 of the construction member 1 does not have any weak parts, the defective part 10 is clean, and primer treatment of the defective part 10 is not required, the preparation step may be omitted. Also, if the repair material 30 can be obtained by a predetermined method, the first forming step may be omitted.

[0141] (Note) The repair material specified in Appendix 1 is a repair material for repairing construction members, and comprises fine aggregate, resin material, water, and a binder for binding the fine aggregate, resin material, and water together, wherein the fine aggregate includes low water absorption fine aggregate with relatively low water absorption, and the water content of the water in the repair material is set to approximately 10.7% to 16.7% by weight.

[0142] The repair material in Appendix 2 is the repair material described in Appendix 1, wherein the low water absorption fine aggregate includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag.

[0143] The repair material in Appendix 3 is the repair material described in Appendix 1 or 2, wherein the content of fine aggregate with a particle size of 0.6 mm or less relative to the binder is approximately 100% to 200% by weight.

[0144] The repair material in Appendix 4 is the repair material described in Appendix 1 or 2, wherein the resin material includes an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer.

[0145] The repair material in Appendix 5 is the repair material described in Appendix 1 or 2, wherein the content of the resin material relative to the binder is approximately 5% to 20% by weight.

[0146] The repair material in Appendix 6 is the repair material described in Appendix 1 or 2, in which the construction member includes floor slab material and / or floor tile material.

[0147] (Effect of the note) According to the repair material described in Appendix 1, the fine aggregate includes low-water-absorbent fine aggregate with relatively low water absorption, and the water content of the repair material is set to approximately 10.7% to 16.7% by weight. This ensures the fluidity of the repair material while reducing shrinkage and increasing the strength of the repaired area formed by the repair material (specifically, peel strength, surface adhesion strength, dynamic load-bearing performance, and compressive strength, etc.), thereby improving the usability of the repair material.

[0148] According to the repair material described in Appendix 2, the low water absorption fine aggregate includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag, making it possible to easily construct the low water absorption fine aggregate and improve its manufacturability.

[0149] According to the repair material described in Appendix 3, the content of fine aggregate with a particle size of 0.6 mm or less relative to the binder is set to approximately 100% to 200% by weight. This makes it easier to form the repaired area with the repair material into a thin film, thus reducing the amount of repair material used when forming the repair material.

[0150] According to the repair material described in Appendix 4, since the resin material contains an acrylic acid ester / methacrylic acid ester copolymer or a styrene acrylic acid ester copolymer, it is easier to ensure the strength of the repaired part formed by the repair material compared to other resin materials, thereby improving the usability of the repaired part.

[0151] According to the repair material described in Appendix 5, the resin content relative to the binder is set to approximately 5% to 20% by weight. Compared to other content ratios, this makes it easier to ensure the strength of the repaired area formed by the repair material, thereby improving the usability of the repaired area.

[0152] According to the repair material described in Appendix 6, since the construction member includes floor slab material and / or floor tile material, it is easy to form the desired repair material on the defective part of the floor slab material and / or floor tile material, thereby further improving the usability of the repair material. [Explanation of Symbols]

[0153] 1. Construction components 10. Defective area 20 Repair Section 30 Repair materials

Claims

1. A repair material for repairing construction components, Fine aggregate and, Resin material and Water and, The fine aggregate, the resin material, and the binder for binding the water together are included. The fine aggregate includes river sand, mountain sand, silica sand, limestone, and / or blast furnace slag. The water content of the repair material is set to 10.7% by weight to 16.7% by weight. The content of fine aggregate with a particle size of 0.6 mm or less in the binder is set to 100% by weight to 200% by weight. The aforementioned resin material includes an acrylic acid ester / methacrylic acid ester copolymer, or a styrene acrylic acid ester copolymer. The content of the resin material in the binder is set to 5% by weight to 20% by weight. The binder comprises Portland cement, alumina cement, gypsum, blast furnace slag powder, and an expansive agent. The content of Portland cement in the binder is 40% to 60% by weight, the content of alumina cement in the binder is 10% to 20% by weight, the content of gypsum in the binder is 1% to 10% by weight, the content of blast furnace slag fine powder in the binder is 10% to 20% by weight, and the content of expansive agent in the binder is 1% to 10% by weight. Repair material.

2. The construction member includes a floor slab material and / or floor tile material, The repair material according to claim 1.

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