Radon gas barrier structure and ground structure

Abstract

The utility model discloses a radon gas barrier structure and a ground structure, and belongs to the technical field of radon gas treatment, and the radon gas barrier structure comprises an adsorption layer, a barrier layer and a barite layer which are sequentially arranged along the thickness direction. The adsorption layer can adsorb radon gas or daughter products of the radon gas, the blocking layer further blocks the radon gas or daughter products of the radon gas and prevents the radon gas or daughter products of the radon gas from penetrating through the radon gas or daughter products, and the barite layer serves as a shielding layer, has excellent ray absorption capacity and can block or reduce radioactive hazards of radon. The radon gas blocking structure can effectively reduce the immersion of the radon gas, and can reduce the radioactive hazard of the radon gas.

Description

Technical Field

[0001] The utility model relates to the technical field of radon gas treatment, in particular to a radon gas barrier structure and a ground structure. Background Art

[0002] Radon gas is a common form of radon, a colorless, tasteless, odorless radioactive inert gas. In nature, radon exists in the form of three main isotopes, radon-222 (Rn-222), radon-220 (Rn-220) and radon-219 (Rn-219), which are usually produced by the decay series of thorium (Th-226) or uranium (U-238). The harm of radon gas to human health mainly comes from the daughter products produced by its radioactive decay. These daughter products are solid particles that can be suspended in the air and inhaled into the lungs. Long-term exposure to high concentrations of radon gas, especially in indoor environments, increases the risk of lung cancer.

[0003] Indoor radon gas mainly enters through soil, rocks, water and building materials. At present, the main measures to reduce indoor radon gas levels are ventilation, sealing cracks and basement floors, and applying radon gas barrier materials. Since radon gas will continue to enter the room from the soil, ventilation can only temporarily reduce the indoor radon gas level, and the use of sealing and applying barrier materials can only achieve a barrier effect. The radioactivity of radon gas will still cause harm to the human body. Utility Model Content

[0004] The main purpose of the utility model is to provide a radon gas barrier structure and a ground structure, aiming at reducing the radioactive hazard of radon gas.

[0005] To achieve the above-mentioned purpose, the radon gas barrier structure proposed by the utility model comprises an adsorption layer, a barrier layer and a barite layer which are sequentially arranged along the thickness direction.

[0006] In one embodiment, the density of barite in the barite layer is ≥4.5 g / cm 3 .

[0007] In one embodiment, the thickness of the barite layer is 10-50 mm.

[0008] In one embodiment, the adsorption layer is selected from a non-woven fabric layer, a tourmaline layer, and an electret material layer.

[0009] In one embodiment, the adsorption layer has a thickness of 0.08-1.2 mm.

[0010] In one embodiment, the barrier layer is a polymer barrier film layer or an aluminum foil layer.

[0011] In one embodiment, the thickness of the barrier layer is 0.002-0.2 mm.

[0012] The utility model also provides a ground structure, comprising the radon gas barrier structure of the utility model.

[0013] In one embodiment, the ground structure further includes a structural layer, a leveling layer and a surface layer, and the structural layer, the leveling layer, the radon gas barrier structure and the surface layer are arranged in sequence along the thickness direction.

[0014] In one embodiment, a mortar layer is further provided between the barite layer and the surface layer of the radon gas barrier structure.

[0015] The radon gas barrier structure of the utility model includes an adsorption layer, a barrier layer and a barite layer. The adsorption layer can adsorb radon gas or its daughter products, and the barrier layer further blocks radon gas or its daughter products to prevent them from penetrating. The barite layer serves as a shielding layer and has excellent radiation absorption capacity, which can block or reduce the radioactive hazards of radon. The radon gas barrier structure of the utility model can effectively reduce the infiltration of radon gas and reduce the radioactive hazards of radon gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a cross-sectional view of a radon gas barrier structure in one embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of the ground structure in one embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional view of the ground structure in another embodiment of the utility model.

[0020] Description of Figure Numbers

[0021] 1. Adsorption layer; 2. Barrier layer; 3. Barite layer; 4. Structural layer; 5. Leveling layer;

[0022] 6. Surface layer; 7. Mortar layer. DETAILED DESCRIPTION

[0023] It should be noted that the "scope" disclosed in the utility model is limited in the form of a lower limit and an upper limit, and a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a special range. The scope limited in this way can be inclusive or exclusive of end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60-120 and 80-110 is listed for a specific parameter, it is understood that the range of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following range can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the utility model, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] The harm of radon gas to human health mainly comes from the daughter products produced by its radioactive decay. These daughter products are solid particles that can be suspended in the air and inhaled into the lungs. Long-term exposure to high concentrations of radon gas, especially in indoor environments, increases the risk of lung cancer.

[0026] Indoor radon gas mainly enters through soil, rocks, water and building materials. At present, the main measures to reduce indoor radon gas levels are ventilation, sealing cracks and basement floors, and applying radon gas barrier materials. Since radon gas will continue to enter the room from the soil, ventilation can only temporarily reduce the indoor radon gas level, and the use of sealing and applying barrier materials can only achieve a barrier effect. The radioactivity of radon gas will still cause harm to the human body.

[0027] To this end, the utility model proposes a radon gas barrier structure, comprising an adsorption layer, a barrier layer and a barite layer which are sequentially arranged along the thickness direction.

[0028] Barite, chemical formula is BaSO 4, is a natural sulfate mineral, also known as barium sulfate. Barite has excellent radiation absorption ability. Its radiation absorption ability comes from its high density and barium element. These characteristics enable barite to effectively absorb and scatter radiation with strong penetrating power, reducing the harm of radiation to the human body. When the radiation photons of radon and its daughters encounter barite, they will collide with the barium electrons or nuclei in the barite. Due to the high density of barite, the possibility of photoelectric effect is high, so it has strong radiation protection ability. Compared with radiation shielding materials such as lead, barite is a non-toxic mineral, safer and more environmentally friendly, and the chemical properties of barite are very stable. It is not easy to react with other substances. Lead may corrode or react with chemicals in the environment under certain conditions, causing its shielding performance to be affected.

[0029] The adsorption layer of the utility model can adsorb radon gas or its daughter products, the barrier layer further blocks radon gas or its daughter products to prevent them from penetrating, and the barite layer, as a shielding layer, has excellent radiation absorption capacity and can block or reduce the radioactive hazards of radon. Therefore, the radon gas barrier structure of the utility model can effectively reduce the infiltration of radon gas and reduce the radioactive hazards of radon gas.

[0030] In the embodiment of the present invention, the density of barite in the barite layer is ≥4.5 g / cm 3 The density of barite affects its ability to absorb radiation, with a higher density meaning there is more barite mass in a given volume, increasing the chances of radiation interacting with the barite, and thus improving radiation absorption.

[0031] In an embodiment of the present invention, the thickness of the barite layer is 10-50 mm.

[0032] In an embodiment of the present invention, the adsorption layer is selected from one of a non-woven fabric layer, a tourmaline layer, and an electret material layer.

[0033] Non-woven fabric is a cloth-like material made using electrostatic spinning technology. It has a three-dimensional interlaced mesh structure, a large specific surface area, many pores, and strong adsorption capacity. Under the action of the electrostatic field force, radon progeny or aerosol particles with a small amount of charge move toward the direction of the electrode with opposite charge polarity and deposit on the surface of the non-woven fabric, thereby achieving the purpose of blocking radon progeny.

[0034] The surface of tourmaline can generate an electrostatic field, and radon progeny or aerosol particles with a small charge will be electrostatically adsorbed by tourmaline under the action of the electrostatic field force. In addition, there are many tiny holes and cracks on the surface of tourmaline, and these structures can physically capture radon progeny.

[0035] Electret material is a material that can maintain electrostatic charge for a long time. This electrostatic property enables the electret material to attract and adsorb radon daughters with opposite charges. Commonly used electret materials include polymer materials, such as polyethylene, polypropylene, polyester, etc., and inorganic materials, such as silicon dioxide, aluminum oxide, etc. The utility model does not make specific restrictions on the selection of electret materials.

[0036] In the embodiment of the present invention, the thickness of the adsorption layer is 0.08-1.2 mm.

[0037] In an embodiment of the present invention, the barrier layer is a polymer barrier film layer or an aluminum foil layer.

[0038] Polymer barrier films include ethylene-vinyl alcohol copolymer (EVOH) film, polyamide (PA) film, polyvinylidene chloride (PVDC) film, polyvinyl alcohol (PVA) film, polyethylene (PE) film, polypropylene (PP) film, nylon 6 (PA) film, polyethylene terephthalate (PET) film, polyacrylic acid (PAA) film, polyethylene oxide (PEO) film. The radon gas barrier property of polymer barrier films can reach 2-5cm 3 / m 2 / day. Aluminum foil has a radon barrier of up to 0.01cm 3 / m 2 / day.

[0039] In an embodiment of the present invention, the thickness of the barrier layer is 0.002-0.2 mm.

[0040] The utility model also provides a ground structure, including the radon gas barrier structure of the utility model. The specific arrangement of the radon gas barrier structure refers to the above embodiments. Since the ground structure of the utility model adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0041] In an embodiment of the utility model, the ground structure further comprises a structural layer, a leveling layer and a surface layer, and the structural layer, the leveling layer, the radon gas barrier structure and the surface layer are arranged in sequence along the thickness direction.

[0042] The structural layer is the foundation layer of the ground structure, and its function is to provide the necessary support, stability and durability for the ground. It can be a soil compaction layer, or a processed gravel layer or concrete layer. The leveling layer is used to adjust the level of the ground, and is usually formed by cement mortar or self-leveling materials. The surface layer mainly provides an aesthetic and durable surface, and can be ceramic tiles, wooden floors, epoxy resins, etc. The structural layer, leveling layer and surface layer are conventional settings of the ground structure, and the embodiments of the utility model do not make specific restrictions.

[0043] In the embodiment of the utility model, a mortar layer is further provided between the barite layer and the surface layer of the radon gas barrier structure. The surface layer and the barite layer are bonded and fixed by the mortar layer to prevent the surface layer from moving. The compressive strength of the mortar layer is M25-M40, where M25 means that the compressive strength of the mortar after 28 days is 25MPa, and the same is true for M40.

[0044] It should be noted that the radon gas barrier structure of the present invention can be used not only in ground structures, but also in other scenarios where radon gas needs to be blocked.

[0045] Next, the utility model is described through specific embodiments.

[0046] Example 1

[0047] A radon gas barrier structure, reference Figure 1 As shown, it includes an adsorption layer 1, a barrier layer 2 and a barite layer 3 which are arranged in sequence along the thickness direction.

[0048] The adsorption layer 1 of this embodiment is a non-woven fabric layer, which can be specifically formed by stacking at least one layer of non-woven fabric and has a strong adsorption force. The thickness of the adsorption layer 1 is 0.1 mm, and the radon progeny can be adsorbed by electrostatic action to prevent them from diffusing outward.

[0049] The barrier layer 2 is a polymer barrier film layer, which can be specifically formed by stacking at least one layer of polymer barrier film. The polymer barrier film is an existing ethylene-vinyl alcohol copolymer film, which has a high barrier performance for radon progeny. The thickness of the barrier layer 2 is 0.002 mm.

[0050] The barite layer 3 can be formed by laying barite powder, or by mixing barite powder with a binder and then coating it on the surface of the barrier layer 2. Barite has high density and strong radiation absorption ability, and can provide radiation protection for radon daughters. The thickness of the barite layer 3 is 10 mm.

[0051] Example 2

[0052] A radon gas barrier structure, which is different from Example 1 in that the thickness of the adsorption layer 1 in this embodiment is 1.2 mm, the thickness of the barrier layer 2 is 0.2 mm, and the thickness of the barite layer is 50 mm.

[0053] Example 3

[0054] A ground structure, reference Figure 2 As shown, it includes a structural layer 4, a leveling layer 5, an adsorption layer 1, a barrier layer 2, a barite layer 3 and a surface layer 6 arranged in sequence along the thickness direction. In this embodiment, the structural layer 4 is a concrete layer, the leveling layer is a cement mortar layer, and the surface layer is a tile layer.

[0055] Example 4

[0056] A ground structure, reference Figure 3 As shown, different from the embodiment 3, this embodiment further has a mortar layer 7 between the barite layer 3 and the surface layer 6, and the mortar layer 7 is used to fix the surface layer 6. The compressive strength of the mortar layer 7 in this embodiment is M40.

[0057] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A radon gas barrier structure, characterized in that: The radon gas barrier structure comprises an adsorption layer, a barrier layer and a barite layer which are sequentially arranged along the thickness direction.

2. The radon gas barrier structure according to claim 1, characterized in that: The density of barite in the barite layer is ≥4.5g / cm 3 .

3. The radon gas barrier structure according to claim 1 or 2, characterized in that: The thickness of the barite layer is 10-50 mm.

4. The radon gas barrier structure according to claim 1, characterized in that: The adsorption layer is selected from one of a non-woven fabric layer, a tourmaline layer, and an electret material layer.

5. The radon gas barrier structure according to claim 1 or 4, characterized in that: The thickness of the adsorption layer is 0.08-1.2 mm.

6. The radon gas barrier structure according to claim 1, characterized in that: The barrier layer is a polymer barrier film layer or an aluminum foil layer.

7. The radon gas barrier structure according to claim 1 or 6, characterized in that: The thickness of the barrier layer is 0.002-0.2 mm.

8. A ground structure, characterized in that: The radon gas barrier structure comprises the radon gas barrier structure as described in any one of claims 1 to 7.

9. The ground structure according to claim 8, characterized in that: The ground structure also includes a structural layer, a leveling layer and a surface layer. The structural layer, the leveling layer, the radon gas barrier structure and the surface layer are arranged in sequence along the thickness direction.

10. The ground structure according to claim 9, characterized in that: A mortar layer is also provided between the barite layer and the surface layer of the radon gas barrier structure.

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