CN102156181A - Device and method for detecting radon exhalation rate of surface of building material - Google Patents
Device and method for detecting radon exhalation rate of surface of building material Download PDFInfo
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- CN102156181A CN102156181A CN2011101133844A CN201110113384A CN102156181A CN 102156181 A CN102156181 A CN 102156181A CN 2011101133844 A CN2011101133844 A CN 2011101133844A CN 201110113384 A CN201110113384 A CN 201110113384A CN 102156181 A CN102156181 A CN 102156181A
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Abstract
The invention relates to a device and method for detecting radon exhalation rate of the surface of a building material. The device comprises a sealed box body in which a building material sample is arranged, an emanometer, a connection box body and connection hoses of the emanometer. The detection method comprises the following steps: a. clearing the surface of the building material to be detected, and removing sundries on the surface; b. measuring the contour dimension of the building material to be detected; c. placing the building material to be detected into the box body and sealing; d. correctly connecting the air inlet and the air outlet of the emanometer with the air inlet and the air outlet of the box body through the connection hoses; e. starting the emanometer, measuring and timing simultaneously; and f. calculating the result according to a calculation formula. The device provided by the invention has reasonable structure, low manufacturing cost, good sealing performance, low background blank and strong applicability; the reproducibility of detection result is good; and the radon exhalation rate of the surface of the building material can be truly reflected.
Description
Technical field
The present invention relates to a kind of building material surface gas-detecting device and detection method thereof, especially a kind of building material surface precipitation rate of radon pick-up unit and detection method thereof.
Background technology
Order domestic construction material surface precipitation rate of radon notion rarely has to be mentioned, only have and mention among the GB50325-2001 (version in 2006) " civil building engineering indoor environmental pollution control standard " that employed inorganic non-metallic construction main body material of civil building engineering and finishing material radioactive indicator limit the quantity of and method of testing, method of testing should meet the regulation of " the radioactive material nucleic is limited the quantity of " GB6566.In order to control building and indoor radon, it mainly was the specific activity of the contained radium of control internal radiation index of building materials or material in the past, no matter be GB6566, or GB50523-2001 (version in 2006) " civil building engineering indoor environmental pollution control standard " national standard, in fact building materials release radon is subjected to multiple factor affecting, and the most direct index should be " eduction rate of radon ".Mentioned building surface precipitation rate of radon notion and detection method among the GB50325-2001 (version in 2010) " civil building engineering indoor environmental pollution control standard ", but the explanation and the detection method specific operation process of pick-up unit have been described seldom.
The World Health Organization (WHO), International Atomic Energy Agency think that all airborne radon is one of reason that causes human cancer, are second reasons (smoking is first reason) that causes lung cancer.International cancer research institution is classified as I class carcinogenic factor with radon.At present, the problem of preventing and treating of radon has obtained the great attention of American-European countries and Chinese Government, and has formulated relevant country, industry standard, the radon gas that is produced by building materials is polluted control.Result of study shows: the radon concentration in the room air becomes positive correlation with the precipitation rate of radon in the material, but the control of the radon that present GB/rower produces Building Material House also all is confined in the test to the material radionuclide amount.In fact in this way the height of the content of radioactive nuclide can not truly reflect the height of the eduction rate of its radon in the material that tests out, and the height of the eduction rate of radon is only the basic reason that causes building materials whether to cause oxygen contamination in the room air.To pollute from the radon gas that control material on the source produces, but also be not specifically designed on sand-cement slurry, the coagulation at present, the specialized equipment that needs the oxygen eduction rate of precipitation rate of radon tests such as brick, building-block, air-entrained concrete building block, finishing material, building component, so building material surface precipitation rate of radon pick-up unit and detection method are urgent problems.
Summary of the invention
In order to overcome above defective, the technical problem to be solved in the present invention is: propose a kind of device and detection method thereof that can detect the building material surface precipitation rate of radon.
The technical solution adopted in the present invention is: a kind of building material surface precipitation rate of radon pick-up unit, comprise that an inside is placed with the connection flexible pipe of the casing of the sealing of building materials sample, emanometer and connect box, emanometer, described casing is provided with first air intake opening, first gas outlet, described emanometer is provided with second air intake opening, second gas outlet, described connection flexible pipe comprises first flexible pipe, second flexible pipe, by described first flexible pipe first air intake opening is connected with second gas outlet, first gas outlet is connected with second air intake opening by described second flexible pipe.
According to another preferred embodiment, building material surface precipitation rate of radon pick-up unit comprises that further described casing is the seal glass casing.
According to another preferred embodiment, building material surface precipitation rate of radon pick-up unit comprises that further described emanometer is based on the continuous emanometer under first flexible pipe, the second flexible pipe effect.
According to another preferred embodiment, building material surface precipitation rate of radon pick-up unit comprises that further described connection flexible pipe is a silica gel hose.
According to another preferred embodiment, building material surface precipitation rate of radon pick-up unit further comprises and also is provided with time measurement device on the described pick-up unit.
The present invention also designs a kind of building material surface precipitation rate of radon detection method, and detection method may further comprise the steps:
A, clear up tested building material surface, remove the surface coverage foreign material;
The physical dimension of b, the tested building materials of measurement, and calculate its volume and surface area, the surface area that defines tested building materials is S, unit is m
2
After c, pick-up unit are ready, tested building materials are put into casing seal;
D, the inlet, outlet of the inlet, outlet of emanometer and casing is connected and puts in place by being connected flexible pipe;
E, by connect flexible pipe with whole detection device connect put in place after, start emanometer, measure beginning, pick up counting simultaneously, the definition Measuring Time is t, unit is s;
F, according to the computing formula of building material surface precipitation rate of radon, result of calculation, defining detected building material surface precipitation rate of radon is R, unit is Becquerel/m
2S.
According to another preferred embodiment, before building material surface precipitation rate of radon detection method further is included in tested building materials test, radon concentration background blank was measured, tested to box house in continuous 12 hours.
According to another preferred embodiment, building material surface precipitation rate of radon detection method comprises that further measurement time t was more than or equal to 6 hours.
According to another preferred embodiment, building material surface precipitation rate of radon detection method comprises that further the computing formula of described building material surface precipitation rate of radon is R=[N
t* V (1-λ
t)] ÷ (S * t), wherein, N
tBe defined as the radon concentration that t records constantly, unit is Becquerel/m
3V is defined as net air volume in the casing, is tank-volumes and deducts volume of sample, and unit is m
3Lambda definition is R
n 222Disintegration constant, i.e. λ=0.007553h
-1, λ
tIn t in h.
The invention has the beneficial effects as follows: the invention provides the pick-up unit of building material surface precipitation rate of radon, it is rational in infrastructure, and cost is low, and adaptability is strong, and is easy and simple to handle; The present invention also provides the detection method that adopts this pick-up unit that the building material surface precipitation rate of radon is detected, and its testing result repdocutbility is good, and it is low to detect cost, can reflect truly that the building material surface radon is separated out situation under the actual user mode.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
Among the figure: 1, casing, 2, emanometer, 3, tested building materials, 4, first air intake opening, 5, first gas outlet, 6, second air intake opening, 7, second gas outlet, 8, first flexible pipe, 9, second flexible pipe.
Embodiment
The present invention is further detailed explanation with preferred embodiment in conjunction with the accompanying drawings now.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1, a kind of building material surface precipitation rate of radon pick-up unit, comprise that an inside is placed with the connection flexible pipe of the casing 1 of the sealing of tested building materials 3, emanometer 2 and connect box 1, emanometer 2, described casing 1 is provided with first air intake opening 4, first gas outlet 5, described emanometer 2 is provided with second air intake opening 6, second gas outlet 7, described connection flexible pipe comprises first flexible pipe 8, second flexible pipe 9, by described first flexible pipe 8 first air intake opening 4 is connected with second gas outlet 7, first gas outlet 5 is connected with second air intake opening 6 by described second flexible pipe 9.
Wherein, casing 1 is homemade seal glass casing.Because homemade glass casing cost is low, rational in infrastructure, detected sample is placed convenient; Seal glass box sealing performance is good, and air radon concentration background is low in the airtight casing 1, and isolation effect is good.
The connection flexible pipe is a silica gel hose.Silica gel hose adopts high quality silicon rubber, processes and makes through scientific formula, advanced technologies.This product has softness, high temperature resistant, steady performance.
Also be provided with time measurement device on the pick-up unit.Be convenient to accurately control the detection time of whole detection device, convenient control to whole testing process.
A kind of building material surface precipitation rate of radon detection method, detection method may further comprise the steps:
The surface coverage foreign material are removed on a, the tested building materials of cleaning 3 surfaces;
The physical dimension of b, the tested building materials 3 of measurement, and calculate its volume and surface area, the surface area that defines tested building materials 3 is S, unit is m
2
After c, pick-up unit are ready, tested building materials 3 is put into casing 1 sealing;
D, the inlet, outlet of the inlet, outlet of emanometer 2 and casing 1 is connected and puts in place by being connected flexible pipe;
E, by connect flexible pipe with whole detection device connect put in place after, start emanometer 2, measure beginning, pick up counting simultaneously, the definition Measuring Time is t, unit is s;
F, according to the computing formula of building material surface precipitation rate of radon, result of calculation, defining detected building material surface precipitation rate of radon is R, unit is Becquerel/m
2S.
Before tested building materials 3 tests, to casing 1 measurement in inner continuous 12 hours, test radon concentration background blank.Keep lower background blank, the precision of going bail for and measuring.
Measurement time t was more than or equal to 6 hours.In the measuring process, keep the sealing of proving installation, prevent gas leakage, laboratory room temperature and humidity keep relative stability in the test process.
The computing formula of described building material surface precipitation rate of radon is R=[N
t* V (1-λ
t)] ÷ (S * t), wherein, N
tBe defined as the radon concentration that t records constantly, unit is Becquerel/m
3V is defined as net air volume in the casing 1, is casing 1 volume and deducts volume of sample, and unit is m
3Lambda definition is R
n 222Disintegration constant, i.e. λ=0.007553h
-1, λ
tIn t in h.
Following table is that pick-up unit of the present invention and method are tested all kinds of inorganic non-metallic construction main body materials and finishing material surface eduction rate reference data.
Adopt the pick-up unit of building material surface precipitation rate of radon among the present invention, it is rational in infrastructure, and cost is low, and adaptability is strong, and is easy and simple to handle.The detection method that adopts this pick-up unit that the building material surface precipitation rate of radon is detected, its testing result repdocutbility is good, and it is low to detect cost, can truly reflect the building material surface precipitation rate of radon.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to the claim scope.
Claims (9)
1. building material surface precipitation rate of radon pick-up unit, it is characterized in that: comprise that an inside is placed with the connection flexible pipe of the casing of the sealing of building materials sample, emanometer and connect box, emanometer, described casing is provided with first air intake opening, first gas outlet, described emanometer is provided with second air intake opening, second gas outlet, described connection flexible pipe comprises first flexible pipe, second flexible pipe, by described first flexible pipe first air intake opening is connected with second gas outlet, first gas outlet is connected with second air intake opening by described second flexible pipe.
2. building material surface precipitation rate of radon pick-up unit according to claim 1 is characterized in that; Described casing is the seal glass casing.
3. building material surface precipitation rate of radon pick-up unit according to claim 1 is characterized in that: described emanometer is based on the continuous emanometer under first flexible pipe, the second flexible pipe effect.
4. building material surface precipitation rate of radon pick-up unit according to claim 1 is characterized in that: described connection flexible pipe is a silica gel hose.
5. building material surface precipitation rate of radon pick-up unit according to claim 1 is characterized in that: also be provided with time measurement device on the described pick-up unit.
6. building material surface precipitation rate of radon detection method, it is characterized in that: detection method may further comprise the steps:
A, clear up tested building material surface, remove the surface coverage foreign material;
The physical dimension of b, the tested building materials of measurement, and calculate its volume and surface area, the surface area that defines tested building materials is S, unit is m
2
After c, pick-up unit are ready, tested building materials are put into casing seal;
D, the inlet, outlet of the inlet, outlet of emanometer and casing is connected and puts in place by being connected flexible pipe;
E, by connect flexible pipe with whole detection device connect put in place after, start emanometer, measure beginning, pick up counting simultaneously, the definition Measuring Time is t, unit is s;
F, according to the computing formula of building material surface precipitation rate of radon, result of calculation, defining detected building material surface precipitation rate of radon is R, unit is Becquerel/m
2S.
7. building material surface precipitation rate of radon detection method according to claim 6 is characterized in that: before tested building materials test, radon concentration background blank was measured, tested to box house in continuous 12 hours.
8. building material surface precipitation rate of radon detection method according to claim 6, it is characterized in that: measurement time t was more than or equal to 6 hours.
9. building material surface precipitation rate of radon detection method according to claim 6 is characterized in that: the computing formula of described building material surface precipitation rate of radon is R=[N
t* V (1-λ
t)] ÷ (S * t), wherein, N
tBe defined as the radon concentration that t records constantly, unit is Becquerel/m
3V is defined as net air volume in the casing, is tank-volumes and deducts volume of sample, and unit is m
3Lambda definition is R
n 222Disintegration constant, i.e. λ=0.007553h
-1, λ
tIn t in h.
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| CN2011101133844A CN102156181A (en) | 2011-05-04 | 2011-05-04 | Device and method for detecting radon exhalation rate of surface of building material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499672A (en) * | 2013-10-16 | 2014-01-08 | 衡阳师范学院 | Method and device for optionally adjusting radon exhalation rate and effective decay constants |
| CN105203743A (en) * | 2015-09-30 | 2015-12-30 | 衡阳师范学院 | Method for acquiring exhalation rate of radon in indoor environment by directly measuring building material sample blocks |
| CN106772553A (en) * | 2017-03-01 | 2017-05-31 | 苏州益普敦新材料科技有限公司 | A kind of building material surface test chamber for radon exhalation rate |
| CN108089221A (en) * | 2018-02-02 | 2018-05-29 | 衡阳师范学院 | A kind of reference unit and method for stablizing regulation and control precipitation rate of radon |
| CN108931465A (en) * | 2018-05-21 | 2018-12-04 | 南华大学 | The method for measuring radon diffusion coefficient and the radon production rate that can migrate in porous medium of emanating |
| CN108931805A (en) * | 2018-07-12 | 2018-12-04 | 广州圣安环保科技有限公司 | A kind of intelligent building material surface precipitation rate of radon test macro |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499672A (en) * | 2013-10-16 | 2014-01-08 | 衡阳师范学院 | Method and device for optionally adjusting radon exhalation rate and effective decay constants |
| CN105203743A (en) * | 2015-09-30 | 2015-12-30 | 衡阳师范学院 | Method for acquiring exhalation rate of radon in indoor environment by directly measuring building material sample blocks |
| CN106772553A (en) * | 2017-03-01 | 2017-05-31 | 苏州益普敦新材料科技有限公司 | A kind of building material surface test chamber for radon exhalation rate |
| CN108089221A (en) * | 2018-02-02 | 2018-05-29 | 衡阳师范学院 | A kind of reference unit and method for stablizing regulation and control precipitation rate of radon |
| CN108089221B (en) * | 2018-02-02 | 2020-06-02 | 衡阳师范学院 | Reference device and method capable of stably regulating and controlling radon exhalation rate |
| CN108931465A (en) * | 2018-05-21 | 2018-12-04 | 南华大学 | The method for measuring radon diffusion coefficient and the radon production rate that can migrate in porous medium of emanating |
| CN108931465B (en) * | 2018-05-21 | 2020-07-14 | 南华大学 | Method for measuring diffusion coefficient and transportable radon generation rate in porous emanation medium |
| CN108931805A (en) * | 2018-07-12 | 2018-12-04 | 广州圣安环保科技有限公司 | A kind of intelligent building material surface precipitation rate of radon test macro |
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Application publication date: 20110817 |