Elastic composite waterproofing material for blocking radon, manufacturing method thereof, and construction method using same

Abstract

The present invention relates to an elastic composite waterproofing material for blocking radon, characterized by comprising ethylene vinyl acetate (EVA), an illite / polymer composite, silica sand, and cement. The elastic composite waterproofing material for blocking radon has the advantages of blocking radon in an environmentally friendly manner by containing the illite / polymer composite, and forming a waterproofing layer having high mechanical strength and excellent watertightness and durability by containing inorganic materials. In addition, it is possible to provide an elastic composite waterproofing material having crack resistance by forming an elastic waterproofing layer having excellent adhesion to a concrete floor surface, and provide a manufacturing method thereof and a construction method using same.

Description

Elastic composite waterproofing material for blocking radon, its manufacturing method, and construction method using the same

[0001] The present invention relates to an elastic composite waterproofing material for blocking radon, a method for manufacturing the same, and a construction method using the same. More specifically, the present invention relates to an elastic composite waterproofing material that is constructed on a wall or floor of an urban structure to block radon that may flow in from cracks, joints, penetrations, pipes, soil-exposed areas, etc. of the structure, and has a reduced amount of harmful substances emitted.

[0002] This application claims priority to Republic of Korea Patent Application No. 10-2024-0054405, filed April 24, 2024, the entire disclosure of which is incorporated herein by reference.

[0003]

[0004] Radon (Rn) is a Group 1 carcinogen designated by the World Health Organization (WHO). It is a radioactive, hazardous gas that readily penetrates the respiratory system, causing genetic mutations and various cancers. The link between radon and lung cancer was established in the 20th century, and based on this, the International Agency for Research on Cancer (IARC) and the U.S. National Toxicology Program (NTP) classify radon as a carcinogen.

[0005] In particular, radon is colorless and odorless, and cannot be detected by smell, making prevention difficult. Radon is generated from various building materials such as cement, granite, and gypsum board, and as a result, large amounts are detected in houses where people live. It is known that 80-90% of radon enters through cracks in the floor or walls of buildings, 2-5% from building materials, and 1% from groundwater. Radon that enters in this way enters the human body through the respiratory organs of users and residents of the structure, and acts as a radioactive substance and causes genetic mutations. Therefore, radon exposure should be minimized by constructing shielding facilities or blocking materials.

[0006] There are various methods used for radon shielding. Current methods for reducing indoor radon levels in Korea include sealing cracks and gaps with sealants to prevent radon gas from entering, frequent ventilation, and using air purifiers with high radon progeny removal efficiency to reduce radon gas inhaled through dust. If these measures are insufficient, radon exhaust pipes can be installed in the soil beneath the building to collect radon gas in the soil and discharge it directly outside the building, bypassing the indoor air. Furthermore, air intake devices can be used to artificially increase indoor air pressure compared to the lower part of the building, thereby blocking radon gas from entering due to the pressure differential. However, while eliminating cracks, radon exhaust pipes, and air intake devices can provide some radon shielding, they are expensive to install.

[0007] Accordingly, a low-cost and easy-to-construct radon blocking construction method was proposed by painting the building walls with a material that can block radon.

[0008] Korean Patent Publication No. 10-2008-0104770 proposes a painting method for blocking radon emitted from the inside of a concrete wall by forming a lower layer with an acrylic / styrene copolymer emulsion resin, forming an intermediate layer with an acrylic / styrene copolymer emulsion resin and an inorganic material on top of the lower layer, and forming an upper layer with an acrylic / styrene copolymer emulsion resin, titanium dioxide, and a functional inorganic material on top of the upper layer.

[0009] The above-mentioned coating method is limited to building walls and is not easily applicable to floors or ceilings. In reality, radon is also emitted from cracks and floors in buildings, making the coating method insufficient for effective radon blocking.

[0010] Meanwhile, illite, a monoclinic mica mineral, emits large amounts of negative ions and far-infrared rays and has the ability to adsorb, deodorize, and decompose heavy metals and hazardous substances. Illite is known to have more beneficial effects on the human body than any other mineral, creating a pleasant indoor environment, activating cellular function, purifying the blood, and regulating the autonomic nervous system. Using illite in architectural finishing materials can help reduce hazardous substances and heavy metals and improve air quality.

[0011] Accordingly, at a time when a new construction method for increasing the radon blocking rate is required, the inventor of the present invention focused on adding illite to waterproofing materials to add a radon blocking function as a means of solving the radon problem, and judged that if a waterproofing material that can effectively block radon is developed by applying it to building materials or the surface of a building, it would be of great help in solving the radon problem as described above.

[0012]

[0013] To address the above-described problems, the present invention provides an elastic composite waterproofing material for blocking radon, a method for manufacturing the same, and a construction method using the same. Specifically, the present invention provides an elastic composite waterproofing material that can block radon in an environmentally friendly manner by containing an illite / polymer composite, and that can form a waterproofing layer with high tensile strength, watertightness, and durability by containing inorganic materials. Furthermore, the present invention provides an elastic composite waterproofing material that forms an elastic waterproofing layer with excellent adhesion to a concrete floor surface, thereby providing crack resistance.

[0014] However, the above purpose is exemplary, and the technical idea of ​​the present invention is not limited thereto.

[0015]

[0016] One aspect of the present invention for achieving the above object relates to an elastic composite waterproofing material characterized by including ethylene vinyl acetate (EVA), illite / polymer composite, silica, and cement.

[0017] In the above aspect, the illite / polymer composite may include illite, polyammonium salt and sodium alkylsulfonate.

[0018] In the above aspect, the illite / polymer composite may be included in an amount of 50 to 100 parts by weight based on 100 parts by weight of the ethylene vinyl acetate (EVA).

[0019] In the above aspect, the polyammonium salt may be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the illite.

[0020] In the above aspect, the polyammonium salt may have a weight average molecular weight of 50,000 to 100,000 g / mol.

[0021] In the above aspect, the sodium alkyl sulfonate may be included in an amount of 1 to 6 parts by weight relative to 100 parts by weight of the illite.

[0022] In the above aspect, the sodium alkyl sulfonate may have 10 to 13 carbon atoms.

[0023] In the above aspect, the silica may have a particle size of 0.35 mm or less.

[0024] In the above aspect, the silica may be included in an amount of 100 to 300 parts by weight based on 100 parts by weight of the ethylene vinyl acetate (EVA).

[0025] In the above aspect, the cement may be included in an amount of 60 to 80 parts by weight based on 100 parts by weight of the ethylene vinyl acetate (EVA).

[0026] Another aspect of the present invention relates to a method for producing an elastic composite waterproofing material, characterized by comprising the steps of: producing a first agent comprising ethylene vinyl acetate (EVA) and an illite / polymer composite; producing a second agent comprising silica sand and cement; and mixing the first and second agents.

[0027] In addition, another aspect of the present invention relates to a method for constructing an elastic composite waterproofing material, including a step of applying an elastic composite waterproofing material manufactured by the above manufacturing method to a base surface and curing the same.

[0028]

[0029] The elastic composite waterproofing material for blocking radon according to the present invention, a method for manufacturing the same, and a construction method using the same impart not only a waterproofing function but also a radon blocking function by including illite to the elastic composite waterproofing material used to improve the durability of concrete structures, thereby providing an elastic composite waterproofing material with an excellent radon blocking rate, a method for manufacturing the same, and a construction method using the same.

[0030] Specifically, it has the advantages of containing an illite / polymer composite, enabling environmentally friendly radon blocking, and forming a waterproofing layer with high mechanical strength, watertightness, and durability due to the inclusion of inorganic materials. Furthermore, it forms an elastic waterproofing layer with excellent adhesion to concrete floors, providing an elastic composite waterproofing material with crack resistance.

[0031]

[0032] Figure 1 is a flow chart of a process for manufacturing an elastic composite waterproofing material for blocking radon according to an example of the present invention.

[0033]

[0034] Hereinafter, an elastic composite waterproofing material for blocking radon according to the present invention, a method for manufacturing the same, and a construction method using the same will be described in detail. The drawings introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Therefore, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be illustrated in an exaggerated manner to clarify the spirit of the present invention. In this case, unless there is a different definition for the technical and scientific terms used, they have the meaning commonly understood by a person of ordinary skill in the art to which this invention pertains, and a description of well-known functions and configurations that may unnecessarily obscure the gist of the present invention in the following description and the accompanying drawings will be omitted.

[0035] One aspect of the present invention relates to an elastic composite waterproofing material comprising ethylene vinyl acetate (EVA), an illite / polymer composite, silica, and cement.

[0036] The above-mentioned elastic composite waterproofing material for blocking radon contains an illite / polymer composite, enabling it to block radon in an environmentally friendly manner. Furthermore, it contains inorganic materials, enabling it to form a waterproofing layer with high tensile strength, watertightness, and durability. Furthermore, it forms an elastic waterproofing layer with excellent adhesion to concrete floors, providing an elastic composite waterproofing material with crack resistance.

[0037] Hereinafter, an elastic composite waterproofing material for blocking radon according to an example of the present invention will be described in more detail.

[0038] The above elastic composite waterproofing material is characterized by including ethylene vinyl acetate (EVA), illite / polymer composite, silica, and cement.

[0039] First, the above illite / polymer composite is described.

[0040] In one embodiment of the present invention, the illite / polymer composite is characterized by comprising illite, polyammonium salt, and sodium alkyl sulfonate. The illite is a main material of an elastic composite waterproofing material, and the illite / polymer composite may be manufactured by crushing illite into powder and complexing it with the polymer and sodium alkyl sulfonate. The illite is a representative natural clay mineral and a porous mica mineral. It is a yellowish-white synthetic mineral with a thin plate-like structure and its main components are SiO2, Al2O3, K2O, FeO2, etc., and has the effect of emitting a large amount of dissolved oxygen in water. In addition, it has good adsorptive properties for adsorbing heavy metal ions, organic ions, and odors from decaying organic matter dissolved in water, and this adsorptive property is also exhibited in the air, so that it can be used as a raw material for toxic gases and odor removers. In particular, lead (Pb), arsenic (As), cadmium (Cd), mercury (Hg), and hexavalent chromium (Cr 6+ ), copper (Cu), etc., which are harmful to the human body, have an adsorption capacity of 65 to 100%, and have an adsorption capacity of 82 to 97% for harmful gases such as benzene, toluene, formaldehyde, ammonia, and carbon monoxide. Therefore, by adding the illite to a waterproofing composition, an elastic composite waterproofing material that is safe from radon or radiation can be provided.

[0041] The particle size of the illite powder to be combined with the above polymer is preferably 200 to 1,000 mesh to ensure that it functions as a filler to provide durability to the waterproofing material and to ensure breathability. However, this is not limited to this, and the particle size can be adjusted depending on the application location and purpose of the waterproofing material.

[0042] The above illite powder has a disadvantage in that it is prone to self-aggregation due to the influence of ions due to its structural characteristics, and thus has low compatibility and dispersibility with aqueous binders. This problem of low dispersibility with aqueous binders can later lead to a decline in the functionality, physical properties, moldability, and adhesion of the coating material. Therefore, when using the illite in a waterproofing composition, it is preferable to include it in the form of a chemically treated illite polymer composite by complexing it with a polymer, so that the particles can be uniformly dispersed in an aqueous binder such as water, and viscosity stability can be improved, thereby maximizing the expression of the various inherent properties of illite as described above.

[0043] The polyammonium salt is one of the polymers included in the illite / polymer composite for chemical treatment of the illite, and may be used having a solid content of about 35 wt% and a weight average molecular weight of 50,000 to 100,000 g / mol. As a more specific example, it may be poly(diallyldimethylammonium chloride) in an aqueous solution. The polyammonium salt is intended to induce uniform dispersion of illite in an aqueous solution by swelling the illite, and may be added in an amount of 0.1 to 3 parts by weight relative to 100 parts by weight of the illite. When it is added in an amount of less than 0.1 part by weight, uniform dispersion of illite in an aqueous solution cannot be expected, and when it is added in an amount exceeding 3 parts by weight, the viscosity of the composition increases, which reduces rheology and may deteriorate physical properties when manufacturing an elastic composite waterproofing material in the future. The slurry in which the illite is swollen by the polyammonium salt improves stability and maintains a stable viscosity during storage when sodium alkyl sulfonate is added thereafter.

[0044] The above sodium alkyl sulfonate is a compound included in the illite / polymer composite together with the polyammonium salt for chemical treatment of the illite, and can be added to maintain the viscosity of the illite slurry whose dispersibility is increased by the polyammonium salt. As a more specific example, the sodium alkyl sulfonate may be sodium alkyl sulfonate in which the alkyl group has 10 to 13 carbon atoms, and may be included in an amount of 1 to 6 parts by weight based on 100 parts by weight of the illite. When less than 1 part by weight is added, it does not contribute to viscosity maintenance stability, and when more than 6 parts by weight is added, the slurry becomes highly viscous, which causes a problem in that storage stability is reduced.

[0045] As described above, the illite / polymer composite manufactured by including illite, polyammonium salt, and sodium alkyl sulfonate can maintain a constant viscosity to facilitate the workability of the elastic composite waterproofing material composition due to the polymer constituting the composite, and can exhibit excellent water-reducing / maintaining effects. In addition, since the dispersibility and compatibility of illite are improved, when mixed with other elastic composite waterproofing material components, large or small bubbles can be maintained consistently, and thus the storage stability, durability, and adhesive performance of the elastic composite waterproofing material can be improved. In order to achieve the desired effect, the illite / polymer composite may be included in an amount of 50 to 100 parts by weight based on 100 parts by weight of the ethylene vinyl acetate (EVA). In a range of less than 50 parts by weight, the effect of adding the composite is minimal, and in a range of more than 100 parts by weight, the content of EVA becomes relatively low, so that the adhesive strength decreases and it is difficult to form a waterproofing material.

[0046] In one example of the present invention, the ethylene vinyl acetate (EVA) is a polymer obtained by copolymerizing ethylene and vinyl acetate polymer, and is a material that has been used for purposes such as children's foam stickers, packaging materials, adhesive cushions, and buoyancy, and is also used as an eco-friendly adhesive. The ethylene vinyl acetate (EVA) may be used in an emulsion in which the solid content is 45 to 55 wt%. Within the range that satisfies the solid content of the ethylene vinyl acetate as described above, the compatibility and bonding strength between the elastic composite waterproofing material compositions are improved, and when the elastic composite waterproofing material is applied in the future, excellent adhesion to the concrete floor surface or the surface of a structure can be exhibited. In addition, by including the ethylene vinyl acetate, elasticity can be imparted to the elastic composite waterproofing material, and excellent crack resistance can be achieved. The emulsion containing the above ethylene vinyl acetate can be used having a viscosity of 500 to 1,000 cp (25°C) and a pH of 4.5 to 6.5.

[0047] In one example of the present invention, the silica sand is used to induce strong bonding of the waterproofing material, and can provide bonding strength and wear resistance to the elastic composite waterproofing material. The silica sand is sand containing silicon dioxide (SiO2), which is an anhydrous silicic acid, and may have a particle size of 0.35 mm or less. In order to ensure that the mixed composition fills every corner well and exhibits a beautiful appearance, it is more preferable to use silica sand having a particle size of 0.2 mm or less. The silica sand may be included in an amount of 100 to 300 parts by weight relative to 100 parts by weight of ethylene vinyl acetate (EVA). If the silica sand is included in an amount of less than 100 parts by weight, there is a problem that the sturdiness and bonding force are reduced, and if it exceeds 300 parts by weight, the density of the elastic composite waterproofing material is excessively increased, which causes a problem that the self-leveling property is reduced.

[0048] The above cement may be used without particular limitation as long as it is commonly used in the art, and may be, for example, Portland cement, fly ash cement, blast furnace slag cement, etc. Preferably, the cement suitable for use in the elastic composite waterproofing material may be Portland cement. The cement may be added in an amount of 60 to 80 parts by weight relative to 100 parts by weight of ethylene vinyl acetate (EVA).

[0049] Furthermore, an admixture may be added to the elastic composite waterproofing material according to an example of the present invention. The admixture may be used without limitation as long as it is commonly used in the art to impart a desired function. As the admixture, more preferably, one suitable for KS F 2560, KS F 2563, KS L 5405, or one or more selected from among AE agents, AE water reducing agents, waterproofing agents, rust inhibitors, retarder, fluidizing agents, and setting and hardening regulators may be used. The admixture may be added in an amount of 0.5 to 1.5 parts by weight relative to 100 parts by weight of the ethylene vinyl acetate (EVA), and specifically, a water reducing agent may be used to reduce the amount of cement used.

[0050] In addition, the elastic composite waterproofing material may include one or more selected from among reinforcing materials, binders, pigments, soil stabilizers, and soil solidification agents as needed, and the specific types and contents may be selected within a typical range.

[0051] The water used in the above elastic composite waterproofing material can be ordinary tap water, and when using other water, follow KS F 4009 Appendix 2 ‘Water used in ready-mixed concrete mixtures’.

[0052] The elastic composite waterproofing material according to one example of the present invention is characterized in that the ethylene vinyl acetate (EVA) and the illite / polymer composite are included in the first agent, the silica sand and cement are included in the second agent, and the first agent and the second agent are mixed and hardened to produce the material.

[0053] Another aspect of the present invention relates to a method for producing an elastic composite waterproofing material, characterized by comprising the steps of: producing a first agent comprising ethylene vinyl acetate (EVA) and an illite / polymer composite; producing a second agent comprising silica sand and cement; and mixing the first and second agents. The mixing process can be performed according to a process commonly used in the art.

[0054] In addition, another aspect of the present invention relates to a method for constructing an elastic composite waterproofing material, including a step of applying a first agent including ethylene vinyl acetate (EVA) and an illite / polymer composite and a second agent including silica sand and cement to a base surface and curing the same. After compacting and preparing the base surface, the first agent and the second agent can be applied and cured, and the application process and the curing process can be performed according to a conventional method.

[0055] Hereinafter, the elastic composite waterproofing material for blocking radon according to the present invention, its manufacturing method, and its construction method will be described in more detail through examples. However, the following examples are merely references for explaining the present invention in detail and are not intended to limit the present invention, which may be implemented in various forms.

[0056] Additionally, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is merely for the purpose of describing specific embodiments and is not intended to be limiting of the invention.

[0057]

[0058] [Manufacturing of Illite / Polymer Composites and Preparation of the First Agent]

[0059] To a suspension of illite (sootoylite, 500 g) dispersed in 2 L of water, 10 g of polydiaryldimethylammonium chloride (solid content 35 wt%, weight average molecular weight 80,000 g / mol) was added and stirred. To the swollen dispersion, 25 g of sodium alkylsulfonate (cas. 68411-30-3, molecular weight 334.45 g / mol) was added and stirred to prepare an illite / polymer composite slurry. Then, 2,000 g (EVA content: 1,000 g) of EVA emulsion having a solid content of 50 wt% was added to prepare Agent 1.

[0060]

[0061] [2nd ingredient and manufacturing]

[0062] 2,000 g of silica sand (size 0.18 mm), 700 g of Portland cement, 10 g of sodium polynaphthalene sulfonate as an admixture, and 9 g of a soil solidifying agent were mixed in 6 L of water to prepare a second agent having a solid content of approximately 50 wt%.

[0063]

[0064] [Manufacturing Example 1 and Comparative Manufacturing Examples 1 and 2]

[0065] 1) Manufacturing Example 1: An elastic composite waterproofing material composition was manufactured by mixing the first and second agents including the above-mentioned illite / polymer composite slurry and EVA emulsion.

[0066] 2) Comparative Manufacturing Example 1: Comparative Manufacturing Example 1 was manufactured using the same process as Manufacturing Example 1, except that the amount of water in the second agent was changed to 5.5 L and the above illite / polymer complex was not added.

[0067] 3) Comparative Manufacturing Example 2: Comparative Manufacturing Example 2 was manufactured using the same process as Manufacturing Example 1, except that only illite was added instead of the illite / polymer complex.

[0068] The ingredient contents of the above Manufacturing Example 1 and Comparative Manufacturing Examples 1 and 2 are shown in Table 1 below.

[0069]

[0070] Unit (g) Manufacturing Example 1 Comparative Manufacturing Example 1 Comparative Manufacturing Example 21 Jeilite / Polymer Complex Illite 500-500 Polyammonium Salt 10--Sodium Alkyl Sulfonate 25--EVA 1,000 1,000 1,000 2 Regular Sand 2,000 2,000 2,000 Cement 700 700 700 Other 19 19 19

[0071]

[0072] [Characteristic evaluation method]

[0073] 1) Tensile performance: The compositions of Manufacturing Example 1 and Comparative Manufacturing Examples 1 to 2 were cured to manufacture an elastic composite waterproofing material, and the tensile performance was evaluated according to the KS F 3211: 2015 test standard, and the results are shown in Table 2 below.

[0074] 2) Tear performance: The compositions of Manufacturing Example 1 and Comparative Manufacturing Examples 1 to 2 were cured to manufacture an elastic composite waterproofing material, and the tear performance was evaluated according to the KS F 3211: 2015 test standard, and the results are shown in Table 2 below.

[0075] 3) Adhesion performance: The compositions of Manufacturing Example 1 and Comparative Manufacturing Examples 1 to 2 were cured to manufacture an elastic composite waterproofing material, and the adhesion performance was evaluated according to the KS F 3211: 2015 test standard, and the results are shown in Table 2 below.

[0076] 4) Radon blocking performance: 20 g of soil with a high radon emission concentration was placed in a white media bottle and used as a radon source. The hole in the cap of the media bottle having a circular hole with a diameter of 5 mm was filled with each composition of Manufacturing Example 1 and Comparative Manufacturing Examples 1 and 2, which had been irradiated with 3 kGy of electron beam, as a radon shielding agent, and then naturally dried for 24 hours. After drying, each media bottle was placed in a small acrylic chamber equipped with a radon measuring device (Radon eye plus 2), and a completely sealed state was confirmed through a gas leak test. The radon blocking rate was measured for 7 days, and the results are shown in Table 2 below.

[0077] 5) Evaluation of hazardous substance emissions: For the elastic composite waterproofing material of Manufacturing Example 1 above, watertightness performance, total volatile organic compounds (TVOC) emissions, toluene emissions, and formaldehyde emissions were evaluated according to the KS F 4937:2019 test standard, and the results are shown in Table 3.

[0078]

[0079] Test Items Manufacturing Example 1 Comparative Manufacturing Example 1 Comparative Manufacturing Example 2 Tensile Performance Tensile Strength (N / mm2) 2.2 1.2 1.4 Elongation at Break (%) 4 2 4 3 0 1 3 0 5 Tear Performance Tear Strength (N / mm) 10.1 5.4 5.9 Bonding Performance Bonding Strength (N / mm2) (Untreated) 0.8 0.6 0.8 Bonding Strength (N / mm2) (After Repeated Cold and Hot Treatment) 0.7 0.5 0.5 Radon Blocking Performance Radon Blocking Rate (%) 9 5 5 2 9 1

[0080]

[0081] Test Item Manufacturing Example 1 No abnormality in watertight performance TVOC emission (mg / ㎡*h) Less than 0.020 Toluene emission (mg / ㎡*h) Less than 0.005 Formaldehyde emission (mg / ㎡*h) Less than 0.005

[0082]

[0083] Looking at Table 2 above, it can be seen that Manufacturing Example 1 containing the illite / polymer composite has excellent mechanical properties with a tensile strength of 2.2 N / mm2 and an elongation at break of 424%. In addition, the tear strength is 10.1 N / mm, and the adhesion performance is not excessively reduced even after repeated hot and cold treatments, indicating excellent durability. However, in the case of Comparative Manufacturing Example 1 that does not contain the illite / polymer composite, all tested items decreased compared to the values ​​of Manufacturing Example 1, and from this, the effect of improving the properties of the elastic composite waterproofing material including the illite / polymer composite could be seen. In addition, in the case of the comparative manufacturing example 2 above, where only illite was added, the effect of improving the mechanical properties of the waterproofing material was minimal, and the adhesion performance was lowered to 0.5 N / mm2 after repeated cold and hot treatments. In comparison, it was confirmed that when illite was added in the form of a complex with a polymer, dispersibility and viscosity stability increased, and the effect of improving the physical properties and durability could be maximized.

[0084] In addition, in terms of radon blocking rate, Comparative Manufacturing Example 2, to which the illite was added, showed an excellent result of a radon blocking rate of 90% or more. In particular, Manufacturing Example 1, to which the illite / polymer composite was added, showed an excellent result of a radon blocking rate of 95%, indicating that an elastic composite waterproofing material with an excellent radon blocking rate can be provided.

[0085] Looking at Table 3 above, when the illite / polymer composite of Manufacturing Example 1 was included, there was no decrease in watertightness performance, and the total volatile organic compounds (TVOC, Total Volatile Organic Compounds) emissions, toluene emissions, and formaldehyde emissions were below the standard, confirming that an environmentally friendly elastic composite waterproofing material can be manufactured.

[0086]

[0087] [Manufacture of Comparative Example 1 and Examples 1 and 2]

[0088] In order to evaluate the mechanical strength according to the content of the above illite / polymer composite, in addition to adjusting the illite / polymer composite content in the coating waterproofing material of Manufacturing Example 1 as shown in Table 4 below, the coating waterproofing material specimens of Comparative Example 1 and Examples 1 to 2 were manufactured using the same process as Manufacturing Example 1.

[0089]

[0090] Weight (g) Comparative Example 1 Example 1 Example 2 EVA 1,000 1,000 1,000 Illite / polymer composite Illite 370 750 930 Polyammonium salt 7.4 15 18.6 Sodium alkyl sulfonate 18.5 3 7.5 4 6.5 Total weight 395.9 8 0 2.5 9 9 5.1

[0091]

[0092] [Characteristic evaluation of Comparative Example 1 and Examples 1 and 2]

[0093] The mechanical properties were evaluated using the same test method as the characteristic evaluation of Manufacturing Example 1 to Comparative Manufacturing Examples 1 to 3, and the results are shown in Table 5.

[0094]

[0095] Test Items Comparative Example 1 Example 1 Example 2 Tensile performance Tensile strength (N / mm2) 2.0 3.0 2.9 Elongation at break (%) 3 3 4 4 2 8 4 2 5 Tear performance Tear strength (N / mm) 7.4 1 0.1 9.9 Bonding performance Bonding strength (N / mm2) (Untreated) 0.8 0.8 0.8 Bonding strength (N / mm2) (After repeated cold and hot treatment) 0.5 0.7 0.7

[0096]

[0097] Referring to Table 5 above, Examples 1 and 2, which contained 50 to 100 parts by weight of the illite / polymer composite, had a tensile strength of 2.9 N / mm2 or more, an elongation at break of 425% or more, a tear strength of 9.9 N / mm2 or more, and it can be seen that the bond strength can also maintain its properties without significant deterioration even after repeated cold and hot treatments. Although Comparative Example 1 tended to have improved properties because it contained about 40 parts by weight of the illite / polymer composite, it was confirmed that the effect of improving properties can be maximized in the content range of 50 to 100 parts by weight, as in Examples 1 and 2. In addition, when a waterproofing film sample containing 120 parts by weight of the illite / polymer composite relative to 100 parts by weight of EVA was produced to evaluate the characteristics in a range where the content of the illite / polymer composite exceeds 100 parts by weight, the adhesive strength of the waterproofing film was reduced due to excessive addition of the illite component compared to EVA, causing a lifting phenomenon and preventing the formation of a finish on the film.

[0098]

[0099] Representative implementation examples or combinations of implementation examples are as follows.

[0100] [Example 1] An elastic composite waterproofing material characterized by including ethylene vinyl acetate (EVA), illite / polymer composite, silica, and cement.

[0101] [Embodiment 2] In the above-described embodiment, an elastic composite waterproofing material characterized in that the illite / polymer composite comprises illite, polyammonium salt, and sodium alkyl sulfonate.

[0102] [Embodiment 3] An elastic composite waterproofing material characterized in that in any one of the above-described embodiments, the illite / polymer composite is included in an amount of 50 to 100 parts by weight relative to 100 parts by weight of the ethylene vinyl acetate (EVA).

[0103] [Embodiment 4] An elastic composite waterproofing material characterized in that in any one of the above-described embodiments, the polyammonium salt is included in an amount of 0.1 to 3 parts by weight relative to 100 parts by weight of the illite.

[0104] [Embodiment 5] An elastic composite waterproofing material, characterized in that in any one of the above-described embodiments, the polyammonium salt has a weight average molecular weight of 50,000 to 100,000 g / mol.

[0105] [Embodiment 6] An elastic composite waterproofing material characterized in that in any one of the above-described embodiments, the sodium alkyl sulfonate is included in an amount of 1 to 6 parts by weight relative to 100 parts by weight of the illite.

[0106] [Embodiment 7] An elastic composite waterproofing material, characterized in that in any one of the above-described embodiments, the number of carbon atoms in the sodium alkyl sulfonate is 10 to 13.

[0107] [Embodiment 8] An elastic composite waterproofing material characterized in that in any one of the above-described implementation examples, the silica has a particle size of 0.35 mm or less.

[0108] [Embodiment 9] An elastic composite waterproofing material characterized in that in any one of the above-described embodiments, the silica is included in an amount of 100 to 300 parts by weight relative to 100 parts by weight of the ethylene vinyl acetate (EVA).

[0109] [Embodiment 10] An elastic composite waterproofing material characterized in that in any one of the above-described embodiments, the cement is included in an amount of 60 to 80 parts by weight relative to 100 parts by weight of the ethylene vinyl acetate (EVA).

[0110] [Embodiment 11] A method for producing an elastic composite waterproofing material, characterized by comprising: a step of producing a first agent including ethylene vinyl acetate (EVA) and an illite / polymer composite; a step of producing a second agent including silica sand and cement; and a step of mixing the first agent and the second agent.

[0111] [Example 12] A method for constructing an elastic composite waterproofing material, comprising: preparing a first agent including ethylene vinyl acetate (EVA) and an illite / polymer composite; preparing a second agent including silica sand and cement; and mixing the first and second agents; applying the prepared elastic composite waterproofing material to a base surface and curing the prepared elastic composite waterproofing material.

[0112] [Example 13] Waterproofing and / or radon blocking use for building materials or structures using an elastic composite waterproofing material comprising ethylene vinyl acetate (EVA), illite / polymer composite, silica, and cement.

[0113] [Example 14] For producing an elastic composite waterproofing material used for waterproofing and / or radon blocking purposes of ethylene vinyl acetate (EVA), illite / polymer composite, silica sand and cement.

[0114]

[0115] Although the present invention has been described through specific matters and limited examples as described above, these are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those skilled in the art to which the present invention pertains can make various modifications and variations based on this description.

[0116] Therefore, the idea of ​​the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims described below as well as the claims are considered to fall within the scope of the idea of ​​the present invention.

Claims

1. An elastic composite waterproofing material comprising ethylene vinyl acetate (EVA), illite / polymer composite, silica, and cement.

2. In paragraph 1, An elastic composite waterproofing material characterized in that the above illite / polymer composite comprises illite, polyammonium salt and sodium alkyl sulfonate.

3. In paragraph 1, An elastic composite waterproofing material characterized in that the above-mentioned illite / polymer composite is contained in an amount of 50 to 100 parts by weight relative to 100 parts by weight of the above-mentioned ethylene vinyl acetate (EVA).

4. In paragraph 2, An elastic composite waterproofing material characterized in that the polyammonium salt is contained in an amount of 0.1 to 3 parts by weight relative to 100 parts by weight of the illite.

5. In paragraph 2, An elastic composite waterproofing material characterized in that the polyammonium salt has a weight average molecular weight of 50,000 to 100,000 g / mol.

6. In paragraph 2, An elastic composite waterproofing material characterized in that the sodium alkyl sulfonate is contained in an amount of 1 to 6 parts by weight relative to 100 parts by weight of the illite.

7. In paragraph 2, An elastic composite waterproofing material characterized in that the above sodium alkyl sulfonate has 10 to 13 carbon atoms.

8. In paragraph 1, The above-mentioned silica is an elastic composite waterproofing material characterized by a particle size of 0.35 mm or less.

9. In paragraph 1, An elastic composite waterproofing material characterized in that the silica is contained in an amount of 100 to 300 parts by weight relative to 100 parts by weight of the ethylene vinyl acetate (EVA).

10. In paragraph 1, An elastic composite waterproofing material characterized in that the cement is contained in an amount of 60 to 80 parts by weight based on 100 parts by weight of the ethylene vinyl acetate (EVA).

11. A step of preparing a first agent comprising ethylene vinyl acetate (EVA) and an illite / polymer composite; A step of manufacturing a second agent including silica and cement; and A step of mixing the first and second agents; A method for manufacturing an elastic composite waterproofing material, characterized by including:

12. A method for constructing an elastic composite waterproofing material, including applying an elastic composite waterproofing material manufactured by the manufacturing method of Article 11 to a base surface and curing it.

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