AU2007201083B2 - Process for Reducing Radon inside Buildings - Google Patents
Process for Reducing Radon inside Buildings Download PDFInfo
- Publication number
- AU2007201083B2 AU2007201083B2 AU2007201083A AU2007201083A AU2007201083B2 AU 2007201083 B2 AU2007201083 B2 AU 2007201083B2 AU 2007201083 A AU2007201083 A AU 2007201083A AU 2007201083 A AU2007201083 A AU 2007201083A AU 2007201083 B2 AU2007201083 B2 AU 2007201083B2
- Authority
- AU
- Australia
- Prior art keywords
- bisphenol
- process according
- building
- epoxy resin
- radon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910052704 radon Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 34
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003822 epoxy resin Substances 0.000 claims abstract description 30
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 19
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 6
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 claims description 5
- XUCHXOAWJMEFLF-UHFFFAOYSA-N bisphenol F diglycidyl ether Chemical compound C1OC1COC(C=C1)=CC=C1CC(C=C1)=CC=C1OCC1CO1 XUCHXOAWJMEFLF-UHFFFAOYSA-N 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229930185605 Bisphenol Natural products 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 229920000768 polyamine Polymers 0.000 claims description 3
- -1 halo epoxides Chemical class 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 239000004594 Masterbatch (MB) Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HCNHNBLSNVSJTJ-UHFFFAOYSA-N 1,1-Bis(4-hydroxyphenyl)ethane Chemical compound C=1C=C(O)C=CC=1C(C)C1=CC=C(O)C=C1 HCNHNBLSNVSJTJ-UHFFFAOYSA-N 0.000 description 1
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- HCWPIIXVSYCSAN-IGMARMGPSA-N Radium-226 Chemical compound [226Ra] HCWPIIXVSYCSAN-IGMARMGPSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 238000001280 alpha-particle spectroscopy Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004924 electrostatic deposition Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- HZEBHPIOVYHPMT-RKEGKUSMSA-N polonium-216 atom Chemical compound [216Po] HZEBHPIOVYHPMT-RKEGKUSMSA-N 0.000 description 1
- HZEBHPIOVYHPMT-KUYOKYOWSA-N polonium-218 atom Chemical compound [218Po] HZEBHPIOVYHPMT-KUYOKYOWSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
Landscapes
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Epoxy Resins (AREA)
- Paints Or Removers (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Geophysics And Detection Of Objects (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Plasma Technology (AREA)
Abstract
Process for reducing radon inside a building whose inner atmosphere is liable to reach a radon concentration of greater than 100 becquerels per m", the said process comprising the application to a component of the carcass of the said building of a composition comprising a crosslinkable epoxy resin of bisphenol A type and a crosslinking agent, the said composition being applied at a dose corresponding to a dose of the said resin of between 300 and 1300 g/m 2. Amended claims
Description
Pool Section 29 Regulation 3.2(2) AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: Process for Reducing Radon inside Buildings The following statement is a full description of this invention, including the best method of performing it known to us: Process for reducing radon inside buildings The present invention relates to a process for reducing radon inside buildings. Radon is a radioactive gas of natural origin 5 arising from the disintegration of the uranium and radium contained in the Earth's crust, and which is naturally present in variable amounts depending on the region and the type of soil. It is present throughout the entire surface of the 10 Earth and particularly in regions with granitic and volcanic subsoils, and can migrate from the soil into the atmosphere, where it tends to accumulate in enclosed spaces, and especially in buildings. The presence of radon in the air inside buildings 15 thus results from the level of formation of this gas in the soil, but also from the characteristics of the envelope of the building in contact with the soil, and especially of the presence of cracks, holes and/or porosity. 20 The presence of radon is of particular concern for buildings in which people reside over long periods (dwellings, schools or public establishments). This radioactive gas can in fact reach concentrations in the air that are liable to represent a risk factor for lung 25 cancer to the occupants of the said buildings, more particularly in the case of simultaneous exposure to tobacco. This is why public authorities are concerned about limiting the average annual concentration of radon in 30 buildings. Thus, the European Union recommends that new buildings should be designed such that this average annual concentration does not exceed 200 Bq/m 3 , France having adopted a value of 1000 Bq/m 3 as the alarm threshold, and 400 Bq/m 3 as a warning level.
- 2 Processes for reducing the concentration of radon in the air inside buildings already exist. The renewal of air can thus be increased by means of natural or mechanical ventilation, which has little 5 effect on changing the penetration of radon into the building, but promotes the dilution and evacuation of the gas. Other treatments consist in acting at the interface between the soil and the building to prevent 10 the entry of radon originating from the soil. Attempts have thus been made to use plastic groundsheets to cover the soil. However, these groundsheets do not allow hermetic sealing capable of completely preventing radon from escaping from the soil into the building. 15 Chemical treatments of the interface between the soil and the building have also been envisaged. Patent US 5 399 603 thus describes the use of an emulsion containing a sulfopolyester, an acrylic copolymer and a plasticizer. 20 It is moreover known practice in the construction field to use crosslinkable epoxy resins of bisphenol A type, for the preparation of cement- or concrete-based supports that are subject to capillary rising of moisture from the soil, optionally prior to the 25 application of levelling coats (also known as resurfacing coats) for the laying of floorcoverings such as parquets, carpets, linos or floor tiles. One aim of the present invention is to propose another method for the chemical treatment of the 30 interface between the soil and the building, which makes it possible to substantially reduce the concentration of radon inside buildings, and especially to improve the impermeability to this gas of the parts of buildings that are in contact with or in the region 35 of the soil. Another aim of the present invention is to propose treatment for simultaneously obtaining a reduction in radon inside a building and for improving the impermeability to moisture of the parts of the building - 3 that are in contact with or in the region of the soil. It has now been found that these aims are totally or partly achieved by applying a limited dose, which is within a specific range, of crosslinkable epoxy resin 5 of bisphenol A type. One subject of the present invention is thus a process for reducing radon inside a building whose inner atmosphere is liable to reach a radon concentration of greater than 100 becquerels per m3, 10 the said process comprising the application to the inner surface of a component of the carcass of the said building, placed in contact with or in the region of the soil, of a composition comprising a crosslinkable epoxy resin of bisphenol A type and a crosslinking 15 agent, the said composition being applied at a dose corresponding to a dose of the said resin of between 300 and 1300 g/m 2 and preferably between 400 and 950 g/m 2 . The present process thus concerns buildings whose 20 inner atmosphere is liable to reach a radon concentration of greater than 100 Becquerels per M3 (Bq/m 3 ). Such a concentration - corresponding to an annual average - generally results from an accumulation, in the case of a confined atmosphere, of 25 the radon that diffuses into the air from the soil or from water, for buildings constructed in a region whose subsoil is of granitic and/or volcanic nature. In the case of France, for example, the regions that are most concerned are Brittany, Corsica, the Massif Central and 30 the Vosges. The determination of the concentration of radon in the air is performed by means of known measurements of radioactive disintegrations of radon atoms, using a dosimeter. On account of the resulting increased health risk 35 factor, it is preferred to implement the process according to the invention for buildings whose inner atmosphere is liable to reach a radon concentration of greater than 200 Bq/m 3 , preferably greater than 400 Bq/m 3 and even more preferentially greater than - 4 1000 Bq/m 3 . The buildings with which the present process is concerned are preferably buildings in which people reside over long periods, such as dwellings, schools, 5 public establishments or premises for professional use. Public establishments are more particularly preferred. The composition used in the process according to the invention comprises one or more crosslinkable epoxy resins(s) of bisphenol A type and one or more 10 crosslinking agent(s). For the purposes of the present invention, the crosslinkable epoxy resins of bisphenol A type are defined as compounds comprising two epoxy groups, which may be obtained by reacting halo epoxides such as 15 epichlorohydrin (also known as 2-(chloromethyl)oxirane) or P-methyl-epichlorohydrin with bisphenol A, bisphenol AD or bisphenol F. Bisphenol A (or 2, 2-bis (4-hydroxyphenyl) propane) has the formula: HO Q Q OH 20 Bisphenol AD (or 1, 1-bis (4-hydroxyphenyl)ethane) has the formula: HO Q O OH Bisphenol F (bis (4-hydroxyphenyl)methane) has the 25 formula: HO Q CH 2 OH A mixture of bisphenol A diglycidyl ether (also known by the abbreviation BADGE) and of bisphenol F diglycidyl ether (BFDGE), having the respective 30 formulae: -5 0 0 CH2 OO-CH2 and O0 CH2)0CH 2 0-CH2 is preferably used as epoxy resin of bisphenol A type. The crosslinking agents used in the composition 5 used in the present invention are chosen from usual agents such as aliphatic or aromatic polyamines, acid anhydrides, imidazoles, polymercaptans and polyamides, in pure form or as a mixture. A mixture of modified polyamide and of aliphatic 10 polyamine is preferably used as crosslinking agent. The crosslinking agent (also known as a curing agent) is present in the composition in an amount expressed as the equivalent number of active hydrogen atoms of the amino group (or other group bearing active 15 hydrogen, depending on the nature of the crosslinking agent used) ranging from 0.8 to 1.2 and preferably from 0.9 to 1.1 per one equivalent of epoxy group present in the crosslinkable epoxy resin. In practical terms, the ratio of the weight of 20 crosslinkable epoxy resin of bisphenol A type to the weight of crosslinking agent is generally between 0.1 and 10 and preferably between 1 and 2. The composition used may also comprise other ingredients, such as a reactive or non-reactive diluent 25 to better control its ease of application, one or more mineral fillers or rheological agents. This composition is generally prepared prior to its application by homogeneous mixing of two commercially available compositions: 30 - a composition A comprising the crosslinkable epoxy resin of bisphenol A type, and - a composition B comprising the crosslinking - 6 agent. The mixture may be applied over a period of time within about 20 to 60 minutes of its preparation, at a temperature of greater than 5 0 C and preferably between 5 10 and 400C. Chemical crosslinking (or polymerization) of the epoxy resin by the curing agent over a time of about 24 hours leads to the formation on the support of a strong, homogeneous coat of crosslinked epoxy resin, 10 which, on account of its adhesion, is very strongly bonded to the treated support. According to one preferred variant of the process according to the invention, the amount of composition to be applied per unit area corresponds to a dose of 15 crosslinkable epoxy resin of bisphenol A type of between 450 and 950 g/m 2 . This amount may be applied in one or more coats, preferably two coats. When it is applied in two coats, the second coat is generally applied 24 hours after the first coat. 20 The carcass components that may be treated via the process according to the invention include any part of the structure ensuring the stability of the construction, which is in contact with or in the region of the soil, especially such as: 25 - the concrete base slab poured onto the soil, constituting the seat of the building, which may or may not be covered with a screed, in the case of constructions on an earth platform, - the foundations, basements or support walls, in 30 the case of constructions with basements, - the vertical walls surrounding the crawl space (of a height generally ranging from about 10 to 80 cm) on the base of which rests the concrete base slab of the ground floor, 35 - the impermeability elements of the walls of an underground premises (also known as the casing). The carcass component that is preferred for the application of the process according to the invention is a concrete base slab covered with a screed.
-7 These carcass components generally consist of concrete, mortar, cement, plaster or metal. It is on their inner surface oriented horizontally or vertically towards the interior of the building, in naked form or 5 optionally provided with a covering such as pre existing tiling, that the composition based on epoxy resin of bisphenol A type is applied via usual techniques such as by roller, float or toothed spatula for horizontal surfaces, or by brush for vertical 10 surfaces. The process according to the invention may optionally comprise, just after applying the composition to a horizontal carcass component, and before the polymerization is complete, the application 15 of sand with a granulometric cut-off of between 0.2 and 1 mm, in an amount of 3 to 4 kg/m 2 Brief description of the figure: Figure 1 is a scheme of an experimental device for 20 determining the efficacy, in terms of reducing the radon concentration of the air, of a specimen consisting of a reinforced cement support covered with a coat of epoxy resin of crosslinked bisphenol A type. This device comprises: 25 - a chamber consisting of a lower hemisphere (1) functioning as a radon reservoir in which is present a high concentration of radon; this concentration is obtained using a source (2) of radium-226 and the pump (3); 30 - the specimen (4) described above, attached to the hemisphere (1) by means of a silicone seal (5), the coat of crosslinked resin being on the upper surface of the support; - a chamber consisting of an upper hemisphere (6) 35 attached to the specimen (4) in which is measured the level of emission of radon through the said specimen (4); - a detector (7) attached to the top of the hemisphere (6), which is connected with the hemisphere - 8 (1) to a multi-channel analyser (8) and a computer (9). The description of an example and also of a comparative example are now given for better understanding of the invention, for purely illustrative 5 purposes and without in any way limiting the scope of the present patent application. Example 1: Application of a crosslinkable epoxy resin of 10 bisphenol A type at a dose of 500 g/m 2 : A two-pack epoxy kit is used, comprising: - an epoxy resin essentially comprising a mixture of bisphenol A diglycidyl ether (BADGE) and of bisphenol F diglycidyl ether (BFDGE) and of reactive 15 diluent; - a curing agent essentially comprising a mixture of modified polyamide and of triethylenetetramine. Such a kit is commercially available, for example, under the name Eponal@ 336 from the company Bostik 20 S.A., which is a product known for giving supports in contact with or in the region of the soil an improvement in the impermeability to moisture. A masterbatch is prepared at room temperature by simple mixing of the above two components, at a rate of 25 100 g of resin per 60 g of curing agent, using a beater mounted on an electric blender. Immediately after, 100 g of this mix are applied by spatula to the surface of a square support with a side length of 50 cm, consisting of a reinforced cement 30 tile 5 mm thick. The amount of mix applied is determined by weighing. Immediately after, sand with a granulometric cut-off of between 0.4 and 0.9 mm is applied in an amount suitable to cover the entire tile. After 24 hours, the excess sand is brushed off. 35 A second coat of 100 g of the masterbatch is then applied to the surface previously obtained under the same conditions, without, however, applying sand. The total amount of mix applied to the support consequently corresponds to a dose of crosslinkable - 9 epoxy resin of 500 g/m2 After total crosslinking, the tile thus prepared is covered with a coat of crosslinked epoxy resin. The weight of this coat (per unit area) is 800 g/m 2 , and 5 its thickness (measured using a micrometer) is 1.8 mm. The efficacy of reduction of the radon emission resulting from the tile thus prepared is measured by the assembly shown in Figure 1. After attaching the test specimen to the 10 hemisphere (1), the radon arising from the source (2) is placed in circulation by means of the pump (3) and mixed with the air in the hemisphere (1) . The radon concentration in the air in the hemisphere (1) is about 1 million Bq/m 3 15 After obtaining a constant radon concentration gradient between the air in the hemisphere (1) and the free surface of the specimen (4), the second hemisphere (6) is attached to the upper surface of the specimen (4) and sealed by means of the seal (5) as indicated in 20 Figure 1. The radon flux passing through the specimen in the direction of the hemisphere (6) is measured by electrostatic deposition (using the detector (7) and a suitable electric field) of the positively charged ions 25 of polonium-218 and polonium-216 resulting from the disintegration of the radon, and then by alpha spectroscopy. The increase in radon concentration in the hemisphere (6) is recorded as a function of time, the 30 signal obtained being processed by the analyser (8) and the computer (9). The diffusion length (or relaxation length) is deduced therefrom by calculation. A relaxation length of 0.55 mm is thus measured. 35 It is estimated that a coat of resin applied to the support is impermeable to radon once its thickness is greater than the triple of the measured relaxation length. It results therefrom that the application to the - 10 support of the epoxy resin at the applied dose makes it impermeable to radon. Comparative example: 5 Application of a crosslinkable epoxy resin of bisphenol A type at a dose of 250 g/m 2 : Example 1 is repeated, applying to the square support with a side length of 50 cm 100 g of the prepared masterbatch instead of 200 g, which 10 corresponds to a dose of crosslinkable epoxy resin of 250 g/m 2 After total crosslinking, a thickness of 1 mm is measured for the coat of crosslinked epoxy resin (whose weight per unit area is 400 g/m2 15 A relaxation length of 2.66 mm is deduced from the measurements taken by means of the assembly in Figure 1. Since this length is less than the triple of the thickness measured for the coat, it results that the 20 application to the support of the epoxy resin of bisphenol A type at the applied dose does not make the support impermeable to radon.
Claims (14)
1. A process for reducing radon inside a building whose inner atmosphere is liable to reach a radon concentration of greater than 100 becquerels per M 3 , the said process comprising the 5 application to the inner surface of a component of the carcass of the said building, placed in contact with or in the region of a soil, of a composition comprising a crosslinkable epoxy resin of bisphenol A type and a crosslinking agent, the said composition being applied at a dose corresponding to a dose of the said resin 10 of between 300 and 1300 g/m 2 .
2. A process according to Claim 1, wherein it is performed for a building whose inner atmosphere is liable to reach a radon concentration of greater than 200 Bq/m 3 .
3. A process according to one of Claims 1 to 2, wherein the 15 process is performed for a building whose inner atmosphere is liable to reach a radon concentration of greater than 400 Bq/m 3 .
4. A process according to one of Claims 1 to 3, wherein the process is performed for a building whose inner atmosphere is liable to reach a radon concentration of greater than 1000 Bq/m 3 . 20
5. Process according to one of Claims 1 to 4, wherein the building is a building in which people reside over long periods.
6. Process according to one of Claims 1 to 5, wherein the building is a public establishment.
7. Process according to one of Claims 1 to 6, wherein the 25 crosslinkable epoxy resin of bisphenol A type may be obtained by reacting halo epoxides with bisphenol A, bisphenol AD or bisphenol F. 12
8. Process according to one of Claims 1 to 7, wherein the crosslinkable epoxy resin of bisphenol A type is a mixture of bisphenol A diglycidyl ether and of bisphenol F diglycidyl ether.
9. Process according to one of Claims 1 to 8, wherein the 5 crosslinking agent is a mixture of modified polyamide and of aliphatic polyamine.
10. Process according to one of Claims 1 to 9, wherein the ratio of the weight of crosslinkable epoxy resin of bisphenol A type to the weight of crosslinking agent is between 0.1 and 10. 10
11. Process according to Claim 10, wherein the ratio of the weight of crosslinkable epoxy resin of bisphenol A type to the weight of crosslinking agent is between 1 and 2.
12. Process according to one of Claims 1 to 11, wherein the dose of crosslinkable epoxy resin of bisphenol A type is between 450 15 and 950 g/m 2 .
13. Process according to one of Claims 1 to 12, characterized in that the carcass component is a concrete base slab covered with a screed.
14. A Process for reducing radon inside a building substantially 20 as herein described. BOSTIK SA WATERMARK PATENT & TRADE MARK ATTORNEYS P28457AU00
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0602159A FR2898368B1 (en) | 2006-03-13 | 2006-03-13 | METHOD FOR REDUCING RADON INSIDE BUILDINGS |
| FR0602159 | 2006-03-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2007201083A1 AU2007201083A1 (en) | 2007-09-27 |
| AU2007201083B2 true AU2007201083B2 (en) | 2012-03-22 |
Family
ID=37564292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007201083A Ceased AU2007201083B2 (en) | 2006-03-13 | 2007-03-13 | Process for Reducing Radon inside Buildings |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20070218832A1 (en) |
| EP (1) | EP1835510B1 (en) |
| AT (1) | ATE413683T1 (en) |
| AU (1) | AU2007201083B2 (en) |
| DE (1) | DE602007000220D1 (en) |
| ES (1) | ES2314954T3 (en) |
| FR (1) | FR2898368B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109666375A (en) * | 2018-12-12 | 2019-04-23 | 沈阳工程学院 | A kind of novel environment friendly radon preventing paint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3619230A (en) * | 1965-09-20 | 1971-11-09 | Matthews Refractories Ltd | Particulate coating method |
| US5801194A (en) * | 1989-09-01 | 1998-09-01 | Battelle Memorial Institute | Termite and boring insect ground barrier for the protection of wooden structures |
| US6329473B1 (en) * | 1994-03-28 | 2001-12-11 | Solutia Germany Gmbh & Co., Kg | Amine-modified epoxy resin composition |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE639424A (en) * | ||||
| GB2217631A (en) * | 1988-03-31 | 1989-11-01 | Westinghouse Electric Corp | Method for attenuating gas diffusion through a structure |
| CH683198A5 (en) * | 1991-04-09 | 1994-01-31 | Hesco Ag | Method for reducing radon exposure in enclosed spaces. |
| DE4311810A1 (en) * | 1993-04-05 | 1994-10-06 | Horn Wolfgang | Process and sealing arrangement for protecting structures against the penetration of harmful gases, in particular of radon, from the foundation |
| US5399603A (en) * | 1993-05-03 | 1995-03-21 | Eastman Chemical Company | Radon barrier film forming compositions |
| DE19515670A1 (en) * | 1995-04-28 | 1996-10-31 | Bluecher Hasso Von | Water vapour-impermeable building film with radon@ barrier action |
| DE19607423A1 (en) * | 1996-02-28 | 1997-09-04 | Hasso Von Bluecher | Laminated wallpaper and flooring material preventing emission of radon into buildings |
| DE19645193A1 (en) * | 1996-11-02 | 1998-05-07 | Bluecher Gmbh | Building boards and plaster boards that have a depletion effect on radon gas naturally entering a building |
| FR2799875B1 (en) * | 1999-10-15 | 2007-10-12 | Jean Pronost | DEVICE FOR SUPPRESSING RADIOACTIVE OR HARMFUL GASES IN HOUSES, BUILDINGS ... |
| JP3951685B2 (en) * | 2001-11-30 | 2007-08-01 | 株式会社日立製作所 | Neutron shielding material and spent fuel container |
| US20050129866A1 (en) * | 2003-12-16 | 2005-06-16 | Ko Chun-Shien | Coating process of aluminium oxide on the surface of plastic floor tiles |
-
2006
- 2006-03-13 FR FR0602159A patent/FR2898368B1/en not_active Expired - Fee Related
-
2007
- 2007-03-08 DE DE602007000220T patent/DE602007000220D1/en active Active
- 2007-03-08 ES ES07004830T patent/ES2314954T3/en active Active
- 2007-03-08 EP EP07004830A patent/EP1835510B1/en active Active
- 2007-03-08 AT AT07004830T patent/ATE413683T1/en not_active IP Right Cessation
- 2007-03-13 AU AU2007201083A patent/AU2007201083B2/en not_active Ceased
- 2007-03-13 US US11/717,147 patent/US20070218832A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3619230A (en) * | 1965-09-20 | 1971-11-09 | Matthews Refractories Ltd | Particulate coating method |
| US5801194A (en) * | 1989-09-01 | 1998-09-01 | Battelle Memorial Institute | Termite and boring insect ground barrier for the protection of wooden structures |
| US6329473B1 (en) * | 1994-03-28 | 2001-12-11 | Solutia Germany Gmbh & Co., Kg | Amine-modified epoxy resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2898368A1 (en) | 2007-09-14 |
| ES2314954T3 (en) | 2009-03-16 |
| DE602007000220D1 (en) | 2008-12-18 |
| EP1835510B1 (en) | 2008-11-05 |
| AU2007201083A1 (en) | 2007-09-27 |
| ATE413683T1 (en) | 2008-11-15 |
| FR2898368B1 (en) | 2008-04-18 |
| US20070218832A1 (en) | 2007-09-20 |
| EP1835510A1 (en) | 2007-09-19 |
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