CN111239322A - Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke - Google Patents
Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke Download PDFInfo
- Publication number
- CN111239322A CN111239322A CN202010067694.6A CN202010067694A CN111239322A CN 111239322 A CN111239322 A CN 111239322A CN 202010067694 A CN202010067694 A CN 202010067694A CN 111239322 A CN111239322 A CN 111239322A
- Authority
- CN
- China
- Prior art keywords
- smoke
- asphalt
- gas
- odorless
- degradation effect
- 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.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 161
- 239000000779 smoke Substances 0.000 title claims abstract description 124
- 230000015556 catabolic process Effects 0.000 title claims abstract description 62
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 62
- 230000000694 effects Effects 0.000 title claims abstract description 58
- 230000009965 odorless effect Effects 0.000 title claims abstract description 48
- 238000011156 evaluation Methods 0.000 title claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 56
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 125
- 230000007613 environmental effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 16
- 238000010835 comparative analysis Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 20
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 13
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 7
- 239000000654 additive Substances 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 7
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013521 mastic Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0042—SO2 or SO3
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0044—Sulphides, e.g. H2S
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0054—Ammonia
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Bridges Or Land Bridges (AREA)
- Road Paving Machines (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a device and a method for evaluating the indoor degradation effect of a smell-less smoke suppressant on asphalt smoke, wherein the evaluation device comprises a gas generation chamber, a gas analyzer and a stirrer, and the gas generation chamber adopts a gas generation chamber with heat preservation, sealing and transparent effects; the evaluation method comprises the steps of preparing the odorless smoke-suppressing asphalt, preparing the odorless smoke-suppressing asphalt mixture according to a mixing ratio design, placing the asphalt mixture in a loose state in a gas generation chamber, stirring the mixture at a constant speed by using a stirring device, collecting asphalt smoke every 15 minutes by using a gas collecting device, analyzing and collecting the concentration of each component of the asphalt smoke by using a gas analyzer when the concentration is stable, and carrying out comparative evaluation on the asphalt smoke degradation effect of the asphalt mixture with or without the odorless smoke-suppressing agent. The evaluation device and the evaluation method provided by the invention are simple and easy to understand, the evaluation result is accurate and accords with the degradation condition of real pavement to the asphalt smoke, and the degradation efficiency of the provided evaluation index can effectively evaluate the degradation effect of the odor-free smoke suppressant on harmful gas in the asphalt smoke.
Description
Technical Field
The invention belongs to the technical field of functional pavement materials, relates to evaluation of asphalt mixture on indoor degradation effect of asphalt smoke, and particularly relates to an evaluation device and an evaluation method of the indoor degradation effect of a odorless smoke suppressant on the asphalt smoke.
Background
In recent years, with the rapid development of urban construction, infrastructure construction of highways, municipal works and the like is increasing day by day, asphalt smoke generated by heating asphalt in the processing industry and the construction process is accompanied by the diffusion of malodor and strong irritating odor, and the asphalt road surface is widely applied, not only directly influences the normal activities of surrounding residents, but also pollutes the atmospheric environment. Therefore, the treatment of asphalt smoke should be further emphasized.
At present, highway construction in China is rapidly developed, and the annual investment scale is over 2000 hundred million RMB. Asphalt pavement is adopted for more than 90% of high-grade highway pavement which is built and is about to be built. Roads built successively after 90 years have entered the major and middle repair periods, and asphalt re-paving and asphalt regeneration are the main forms of renovation. The use amount of the asphalt is greatly increased, and then negative effects are brought: asphalt smoke pollution is increasingly serious. The control of the emission concentration of asphalt smoke is an indispensable index in the current road construction. In the wide-range application of modified asphalt and rubber asphalt, the environmental problem is further deepened due to the increase of the mixing temperature, and although the development of inhibitors for the degradation of asphalt smoke and pungent odor is carried out, the research on the evaluation of the effects of the modified asphalt and the rubber asphalt is still blank.
Therefore, the economic and effective asphalt smoke purification system suitable for the road construction characteristics is an important problem in the current road construction environmental pollution treatment. Compared with the common asphalt mixture, the asphalt mixture added with the odor-removing smoke suppressant has the outstanding advantages of being capable of reducing the emission of asphalt smoke in a large proportion, reducing the foul smell of asphalt, being beneficial to environmental protection and the like. However, at present, no clear specification and standard exists for the application of the odorless smoke suppressant in road engineering in China, and no clear requirement exists for evaluating the effect of the odorless smoke suppressant, so that certain influence is generated on the application and popularization in construction. Therefore, an effective odor-removing smoke suppressant effect evaluation method is urgently needed to be formulated, the influence effect of the existing odor-removing agent on the asphalt pavement is evaluated, and the method has important significance for reducing asphalt smoke, reducing air pollution and protecting the environment, and is a major subject related to the national civilization.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a device and a method for evaluating the indoor degradation effect of the odor-free smoke suppressant on the asphalt smoke, and compared with the common asphalt mixture, the asphalt mixture added with the odor-free smoke suppressant has the outstanding advantages of being capable of reducing the emission of the asphalt smoke in a large proportion, reducing the foul smell of the asphalt, being beneficial to environmental protection, being convenient for construction in closed environments such as tunnels and the like. In view of the fact that at present, no clear specification and standard exists for the application of the odorless smoke suppressant in a laboratory at home, and no clear requirement exists for evaluating the effect of the odorless smoke suppressant, the application and popularization in construction are influenced to a certain extent.
In order to achieve the above object, the present invention adopts the following technical solutions.
The invention provides a device for evaluating the indoor degradation effect of a smell-removing smoke suppressant on asphalt smoke, which comprises a gas generation chamber, a gas analyzer and a stirrer, wherein the gas generation chamber, the gas analyzer and the stirrer are assembled and connected, and the gas generation chamber adopts a gas generation chamber with heat preservation, sealing and transparent effects.
Preferably, the gas generating chamber is formed from a layer of insulating material.
In any of the above embodiments, it is preferable that the gas generation chamber has a size of 500mm × 500mm × 1000 mm.
In any of the above embodiments, preferably, a tray is attached to the bottom of the gas generating chamber, and the size of the tray is 300mm × 300 mm.
In any of the above solutions, it is preferable that two holes are provided above the gas generating chamber, one hole in the middle is connected to the stirrer, and the other hole on the right is provided with a valve and connected to the gas analyzer.
In any of the above embodiments, preferably, the valve is connected to the gas analyzer through a gas conduit.
In any of the above technical solutions, preferably, the stirrer is connected to a power line.
In any of the above technical solutions, preferably, the stirrer is an electric stirrer, and is disposed in the gas generation chamber, and the stirring rate is 45 times/min.
In any of the above technical solutions, preferably, the gas analyzer is a mobile environmental trace gas analyzer.
The invention also provides an evaluation method of indoor degradation effect of the odor-free smoke suppressant on harmful gas in the asphalt smoke, which adopts the evaluation device, and the evaluation method comprises the following steps:
step one, preparing odorless smoke-suppressing asphalt;
mixing the prepared odorless smoke-suppressing asphalt into an asphalt mixture;
step three, putting the mixed loose asphalt mixture into a gas generation chamber;
after the concentration of the gas in the gas generation chamber is stable, collecting the gas and detecting the concentration of each component;
and step five, processing the detection data, and calculating the degradation rate of harmful gases in the asphalt smoke.
In any of the above technical solutions, preferably, in the step one, the preparation of the odorless smoke-suppressing asphalt requires the following steps:
(1) in consideration of economic benefit and practical effect, the addition of the odor-removing and smoke-suppressing agent is about three ten-thousandth;
(2) adding the odor-removing smoke suppressant 4 hours before the asphalt is used, and stirring for 20 minutes at the speed of 3000r/min by using a high-speed shearing instrument FM-300;
(3) the odor-free smoke suppressant is added strictly according to the recommended addition amount, slowly added in a trace manner, and fully and uniformly stirred on the principle of not generating boiling liquid or boiling gas.
In any of the above technical solutions, preferably, in the second step, the odor-free and smoke-suppressing asphalt mixture is an SMA type asphalt mixture, and the SMA type asphalt mixture is an asphalt mixture formed by filling gaps of an intermittent graded coarse aggregate framework with asphalt mastic composed of asphalt, a fiber stabilizer, mineral powder and a small amount of fine aggregates.
In any of the above technical solutions, preferably, in the second step, the blending of the odorless smoke-suppressing asphalt mixture includes the following steps:
(1) adding mineral aggregate and fibers into a mixing pot according to a mixing ratio and mixing for 45S;
(2) adding the prepared odorless smoke-suppressing asphalt, and uniformly stirring for 45S;
(3) adding mineral powder and mixing with the mixture for 45S;
(4) and taking out the mixed asphalt mixture by using an iron plate, and putting the asphalt mixture into a gas generation chamber in time.
In any of the above technical schemes, it is preferable that the blending temperature of the common asphalt mixture is 150 ℃, the blending temperature of the modified asphalt mixture is 170 ℃, and the blending temperature of the rubber composite modified asphalt mixture is 180 ℃.
In any of the above technical solutions, preferably, in the fourth step, after the mixture is stirred at a constant speed for half an hour, the gas concentration is detected every 15min, and when the gas concentration is stable and unchanged, the concentration values of the components are taken for subsequent evaluation.
In any of the above technical solutions, preferably, in the fourth step, the collected asphalt smoke gas is detected, and the detected gas is one or more of ammonia, nitrogen oxide, sulfur dioxide, and hydrogen sulfide.
In any of the above technical solutions, preferably, in the fifth step, the degradation efficiency of harmful gas in the asphalt smoke is used to represent the indoor asphalt smoke degradation effect performance of the odorless smoke-suppressing asphalt mixture; wherein, the relative degradation rate (%) of harmful gas is (content of harmful gas under different additives-content of harmful gas without additive)/content of harmful gas without additive.
The device for evaluating the degradation effect of the odor-free smoke suppressant in the asphalt smoke chamber mainly comprises a gas generation chamber, a gas analyzer and a stirrer, wherein the gas generation chamber has the effects of heat preservation, sealing and transparency. The invention also provides a method for evaluating the indoor degradation effect of the odorless smoke suppressant on the asphalt smoke, which comprises the steps of preparing odorless smoke suppressant asphalt, designing and preparing an odorless smoke suppressant asphalt mixture according to the mixing proportion, placing the asphalt mixture in a loose state in a gas generation chamber, uniformly stirring the mixture by using a stirring device, collecting the asphalt smoke every 15 minutes by using the device, analyzing and collecting the concentration of each component (ammonia, nitric oxide, sulfur dioxide and hydrogen sulfide) of the asphalt smoke by using a gas analyzer when the concentration is stable, and carrying out comparative evaluation on the asphalt smoke degradation effect of the asphalt mixture without the odorless smoke suppressant.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the evaluation device and the evaluation method for the indoor degradation effect of the odorless smoke suppressant on the asphalt smoke are simple and easy to understand, the evaluation result is accurate and accords with the degradation condition of real pavement on the asphalt smoke, and the degradation efficiency of the odorless smoke suppressant provided by the invention can effectively evaluate the degradation effect of the odorless smoke suppressant on harmful gas in the asphalt smoke.
The device and the method for evaluating the indoor degradation effect of the odorless smoke suppressant on the asphalt smoke are suitable for evaluating the degradation effect of any asphalt mixture added with any material for suppressing the asphalt smoke (such as the odorless smoke suppressant) on harmful gas in the asphalt smoke.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for evaluating the degradation effect of a odorless smoke suppressant on an asphalt smoke chamber according to a preferred embodiment of the invention;
fig. 2 is a diagram showing the degradation effect of the odorless smoke suppressant on the asphalt smoke in the method for evaluating the indoor degradation effect of the asphalt smoke according to the preferred embodiment of the invention.
Reference numerals: 1. gas generation room, 2, stirring instrument, 3, valve, 4, gas conduit, 5, gas analyzer, 6, tray, 7, power cord.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the defects in the prior art, the embodiment of the invention provides a device and a method for evaluating the indoor degradation effect of a smell-free smoke suppressant on asphalt smoke, wherein the evaluation device mainly comprises a gas generation chamber, a gas analyzer and a stirrer, and the gas generation chamber has the effects of heat preservation, sealing and transparency; the evaluation method mainly comprises the steps of preparing the odorless smoke-suppressing asphalt, preparing the odorless smoke-suppressing asphalt mixture according to a mixing ratio design, placing the asphalt mixture in a loose state in a gas generation chamber, uniformly stirring the mixture by using a stirring device, collecting the asphalt smoke every 15 minutes by using the device, analyzing and collecting the concentration of each component (ammonia, nitrogen oxide, sulfur dioxide and hydrogen sulfide) of the asphalt smoke by using a gas analyzer when the concentration is stable, and carrying out comparative evaluation on the asphalt smoke degradation effect of the asphalt mixture with or without the odorless smoke-suppressing agent.
As shown in fig. 1, the device for evaluating the degradation effect of the odor-free smoke suppressant in the asphalt smoke chamber comprises a gas generation chamber 1, a gas analyzer 5 and a stirrer 2; the gas generating chamber 1 has the effects of heat preservation, sealing and transparency.
In this embodiment, the gas generating chamber 1 may be formed of a layer of heat insulating material.
In this embodiment, the gas generating chamber 1 is designed to have a size of 500mm × 500mm × 1000mm, and a tray 6 is attached to the bottom, and the size of the tray 6 is 300mm × 300 mm. The tray is used for placing the mixed and loose asphalt mixture.
In this embodiment, two holes are provided above the gas generating chamber 1, as shown in fig. 1, one hole in the middle is connected to the stirrer 2, and one hole on the right is provided with a valve 3 and connected to a gas analyzer 5, and the valve 3 and the gas analyzer 5 are connected through a gas conduit 4.
In this embodiment, the mixer 2 is connected to a power line 7. The stirrer 2 is an electric stirrer and is arranged in the gas generation chamber 1, and the stirring speed is 45 times/min. The gas generation chamber has an electric stirrer for stirring the mix in real time at a stirring rate of 45 times/min.
In this embodiment, the gas analyzer 5 is a movable environmental trace gas analyzer. The concentration conditions of ammonia, nitrogen oxides, sulfur dioxide and hydrogen sulfide gas in a gas generation room can be monitored in real time by adopting the movable environment trace gas analyzer, and data can be automatically recorded.
The device and the method for evaluating the indoor degradation effect of the odorless smoke suppressant on the asphalt smoke are simple and easy to understand, the evaluation result is accurate and accords with the degradation condition of real pavement on the asphalt smoke, and the provided evaluation index degradation efficiency can effectively evaluate the degradation effect of the odorless smoke suppressant on harmful gas in the asphalt smoke.
The method for evaluating the indoor degradation effect of the odor-free smoke suppressant on the harmful gas in the asphalt smoke by adopting the evaluation device comprises the following steps:
step one, preparing odorless smoke-suppressing asphalt;
in the first step, the preparation requirements of the odorless smoke-suppressing asphalt are as follows:
(1) in consideration of economic benefit and practical effect, the addition amount of the odor-free smoke suppressant is 0.3 per thousand;
(2) adding the odor-removing smoke suppressant 4 hours before the asphalt is used, and stirring for 20 minutes at the speed of 3000r/min by using a high-speed shearing instrument FM-300;
(3) the odor-free smoke suppressant is added strictly according to the recommended addition amount, slowly added in a trace manner, and fully and uniformly stirred on the principle of not generating boiling liquid or boiling gas.
(4) In the second step, the odor-free smoke-suppressing asphalt mixture adopts an SMA asphalt mixture, and the SMA asphalt mixture is an asphalt mixture formed by filling gaps of an intermittent graded coarse aggregate framework with asphalt mastic composed of asphalt, a fiber stabilizer, mineral powder and a small amount of fine aggregates.
Mixing the prepared odorless smoke-suppressing asphalt into an asphalt mixture;
in the second step, the blending of the odorless smoke-suppressing asphalt mixture comprises the following steps:
(1) adding mineral aggregate and fibers into a mixing pot according to a mixing ratio and mixing for 45S;
(2) adding the prepared odorless smoke-suppressing asphalt, and uniformly stirring for 45S;
(3) adding mineral powder and mixing with the mixture for 45S;
(4) and taking out the mixed asphalt mixture by using an iron plate, and putting the asphalt mixture into a gas generation chamber in time.
The mixing temperature of the common asphalt mixture is 150 ℃, the mixing temperature of the modified asphalt mixture is 170 ℃, and the mixing temperature of the rubber composite modified asphalt mixture is 180 ℃.
Step three, putting the mixed loose asphalt mixture into a gas generation chamber;
after the concentration of the gas in the gas generation chamber is stable, collecting the gas and detecting the concentration of each component;
in the fourth step, after the mixture is stirred at a constant speed (45 times/min) for half an hour, the gas concentration is detected every 15min, and when the gas concentration is stable and unchanged, the concentration values of all the components are taken for subsequent evaluation.
And in the fourth step, detecting the collected asphalt smoke gas, wherein the detected gas is ammonia, nitrogen oxide, sulfur dioxide and hydrogen sulfide.
And step five, processing the detection data, and calculating the degradation rate of harmful gases in the asphalt smoke.
In the fifth step, the degradation rate of harmful gases in the asphalt smoke is used for expressing the indoor asphalt smoke degradation effect performance of the odorless smoke-suppressing asphalt mixture; wherein, the relative degradation rate (%) of harmful gas is (content of harmful gas under different additives-content of harmful gas without additive)/content of harmful gas without additive.
The device and the method for evaluating the indoor degradation effect of the odorless smoke suppressant on the asphalt smoke provided by the embodiment can be suitable for evaluating the degradation effect of any asphalt mixture added with any material for suppressing the asphalt smoke (such as the odorless smoke suppressant) on harmful gas in the asphalt smoke.
In the specific implementation, the SBS I-D modified asphalt is selected by combining the technical scheme of the embodiment and the figure 1. And (3) detecting the SBS modified asphalt according to road engineering asphalt and asphalt mixture test regulation JTG E20-2011, recording data as a control group, adding the odor-removing smoke suppressant, performing performance tests under the same conditions, and comparing the two groups of data. The odor-removing smoke suppressant researched and developed by the subject group is added 4 hours before the asphalt is used, the stirring is continued for about 20 minutes, and the addition amount is determined to be 0.3 per mill in the experiment.
The performance indexes of the prepared pure SBS asphalt and the SBS modified asphalt added with the odor-removing smoke suppressant are shown in the table 1 (the performance indexes of the SBS modified asphalt under different components).
TABLE 1
Therefore, the degradation effect of harmful gases in asphalt to which the odor-suppressing agent was added was further evaluated. The mixed asphalt mixture (divided into two types: with or without addition of a smell purification and smoke suppression agent) is put into a gas generation chamber, a stirrer 2 is started, the rotation speed is adjusted to 45 times/min, after asphalt smoke in the gas generation chamber is generated for 1h, the gas concentration is measured every 15min, after the concentration is not changed and the gas is stable, the asphalt smoke gas under the state is collected, and the concentration of each component (ammonia, nitrogen oxide, sulfur dioxide and hydrogen sulfide) is measured by a gas analyzer 5. Wherein the degradation rate of the harmful gas is calculated according to the following formula: relative degradation rate (%) of harmful gas (content of harmful gas under different additives-content of harmful gas without additive)/content of harmful gas without additive. The test results are shown in table 3 (influence of different components on harmful gas content of asphalt smoke), table 4 (influence of different components on degradation effect of asphalt smoke) and fig. 2.
TABLE 3
TABLE 4
From the above tables 3, 4 and fig. 2, it can be seen that: compared with the common hot-mix modified asphalt, the modified asphalt added with the odor-removing smoke suppressant has obviously reduced content of harmful gases. After the odor-free smoke suppressant is added, the degradation rates of the four harmful gases are higher than that of the four harmful gases with a certain component added independently, the degradation rates of the four harmful gases on ammonia gas and hydrogen sulfide gas are the highest, namely 67% and 86%, respectively, and the degradation rate of the four harmful gases on nitrogen oxides is the lowest, namely 31%. The data analysis shows that the degradation effect of the modified asphalt added with the odor-free smoke inhibitor on harmful gas of asphalt smoke is obviously higher than that of the modified asphalt without the additive, and the performance of the asphalt is not influenced.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention; the above description is only for the specific embodiment of the present invention, and is not intended to limit the scope of the present invention; any modification, equivalent replacement, improvement and the like of the technical solution of the present invention by a person of ordinary skill in the art without departing from the design spirit of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims (10)
1. The device for evaluating the indoor degradation effect of the odor-free smoke suppressant on the asphalt smoke comprises a gas analyzer and is characterized by further comprising a gas generation chamber and a stirrer, wherein the gas generation chamber, the stirrer and the gas analyzer are connected in an assembling mode, and the gas generation chamber is a gas generation chamber with heat preservation, sealing and transparent effects.
2. The device for evaluating the degradation effect of a odorless smoke suppressant according to claim 1, wherein the gas generation chamber is formed of a layer of heat insulating material.
3. The apparatus for evaluating the degradation effect of a smoke suppressant having a clean smell on an asphalt smoke chamber according to claim 2, wherein said gas generating chamber has a size of 500mm x 1000 mm.
4. The apparatus for evaluating the degradation effect of a smoke suppressant having a clean smell on an asphalt smoke chamber according to claim 3, wherein a tray is attached to the bottom of said gas generation chamber, and the size of said tray is 300mm x 300 mm.
5. The device for evaluating the degradation effect of the odorless smoke suppressant according to claim 4 in the asphalt smoke chamber, wherein two holes are arranged above the gas generation chamber, one hole in the middle is connected with the stirrer, and the other hole on the right side is provided with a valve and is connected with the gas analyzer.
6. The device for evaluating the degradation effect of the odorless smoke suppressant according to claim 5, wherein the valve is connected with a gas analyzer through a gas conduit.
7. The device for evaluating the indoor degradation effect of the odorless smoke suppressant according to claim 1, wherein the stirrer is connected with a power line.
8. The device for evaluating the degradation effect of the odorless smoke suppressant according to claim 7 in the asphalt smoke chamber, wherein the stirrer is an electric stirrer, is arranged in the gas generation chamber, and is stirred at a speed of 45 times/min.
9. The device for evaluating the degradation effect of the odorless smoke suppressant according to claim 1 in the asphalt smoke chamber, wherein the gas analyzer is a movable environmental trace gas analyzer.
10. A method for evaluating the indoor degradation effect of a odor-suppressing agent on harmful gases in asphalt smoke using the evaluation apparatus as set forth in any one of claims 1 to 9, characterized by comprising the steps of:
step one, preparing odorless smoke-suppressing asphalt;
mixing the prepared odorless smoke-suppressing asphalt into an asphalt mixture;
step three, putting the mixed loose asphalt mixture into a gas generation chamber;
after the concentration of the gas in the gas generation chamber is stable, collecting the gas and detecting the concentration of each component;
and step five, processing the detection data, and calculating the degradation rate of harmful gases in the asphalt smoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010067694.6A CN111239322A (en) | 2020-01-20 | 2020-01-20 | Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010067694.6A CN111239322A (en) | 2020-01-20 | 2020-01-20 | Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111239322A true CN111239322A (en) | 2020-06-05 |
Family
ID=70879777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010067694.6A Pending CN111239322A (en) | 2020-01-20 | 2020-01-20 | Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111239322A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194356A (en) * | 2014-08-12 | 2014-12-10 | 重庆建工住宅建设有限公司 | Hot mix asphalt pavement smoke suppressant and preparation method of smoke-suppressing asphalt |
| CN105527412A (en) * | 2015-12-08 | 2016-04-27 | 东南大学 | Bitumen fume measuring method in mixing process of bituminous mixture |
| CN106257277A (en) * | 2016-06-03 | 2016-12-28 | 北京建筑大学 | A kind of catalysis material is to the evaluating apparatus of PM2.5 degradation effect and evaluation methodology |
| CN106442950A (en) * | 2016-09-14 | 2017-02-22 | 南京林业大学 | Flame retardation and smoke suppression scheme designing method in whole thermal decomposition process of tunnel asphalt pavement |
| CN108275918A (en) * | 2017-09-26 | 2018-07-13 | 深圳海川新材料科技股份有限公司 | A kind of ordor removing asphalt and preparation method thereof |
| CN108491566A (en) * | 2018-02-02 | 2018-09-04 | 北京建筑大学 | A kind of mixing proportion design method of macrovoid high molecular polymer mixture |
| CN108585605A (en) * | 2018-06-11 | 2018-09-28 | 长安大学 | A kind of thermal resistance ordor removing warm mix Multifunctional asphalt modifying agent and its preparation method and application |
| CN110272228A (en) * | 2019-06-18 | 2019-09-24 | 河南省交通规划设计研究院股份有限公司 | The low peculiar smell rubber-asphalt mixture of road engineering |
| CN111440454A (en) * | 2020-01-20 | 2020-07-24 | 北京建筑大学 | Warm-mixed odorless smoke-suppressing asphalt and preparation method thereof |
| CN214106179U (en) * | 2020-11-18 | 2021-09-03 | 海南天佑沥青有限公司 | Asphalt flue gas purification system of asphalt mixing plant |
-
2020
- 2020-01-20 CN CN202010067694.6A patent/CN111239322A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194356A (en) * | 2014-08-12 | 2014-12-10 | 重庆建工住宅建设有限公司 | Hot mix asphalt pavement smoke suppressant and preparation method of smoke-suppressing asphalt |
| CN105527412A (en) * | 2015-12-08 | 2016-04-27 | 东南大学 | Bitumen fume measuring method in mixing process of bituminous mixture |
| CN106257277A (en) * | 2016-06-03 | 2016-12-28 | 北京建筑大学 | A kind of catalysis material is to the evaluating apparatus of PM2.5 degradation effect and evaluation methodology |
| CN106442950A (en) * | 2016-09-14 | 2017-02-22 | 南京林业大学 | Flame retardation and smoke suppression scheme designing method in whole thermal decomposition process of tunnel asphalt pavement |
| CN108275918A (en) * | 2017-09-26 | 2018-07-13 | 深圳海川新材料科技股份有限公司 | A kind of ordor removing asphalt and preparation method thereof |
| CN108491566A (en) * | 2018-02-02 | 2018-09-04 | 北京建筑大学 | A kind of mixing proportion design method of macrovoid high molecular polymer mixture |
| CN108585605A (en) * | 2018-06-11 | 2018-09-28 | 长安大学 | A kind of thermal resistance ordor removing warm mix Multifunctional asphalt modifying agent and its preparation method and application |
| CN110272228A (en) * | 2019-06-18 | 2019-09-24 | 河南省交通规划设计研究院股份有限公司 | The low peculiar smell rubber-asphalt mixture of road engineering |
| CN111440454A (en) * | 2020-01-20 | 2020-07-24 | 北京建筑大学 | Warm-mixed odorless smoke-suppressing asphalt and preparation method thereof |
| CN214106179U (en) * | 2020-11-18 | 2021-09-03 | 海南天佑沥青有限公司 | Asphalt flue gas purification system of asphalt mixing plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Characterization of the aerosol chemical composition during the COVID-19 lockdown period in Suzhou in the Yangtze River Delta, China | |
| CN103173024A (en) | Waste road asphalt recycling agent | |
| Wang et al. | Performance evaluation of desulfurized rubber asphalt based on rheological and environmental effects | |
| Wang et al. | Emission reduction performance of modified hot mix asphalt mixtures | |
| Hu et al. | Influence mechanism of surfactants on wettability of coal with different metamorphic degrees based on infrared spectrum experiments | |
| Wang et al. | Effect of heating history on the emission of volatile organic compounds from asphalt materials | |
| Bueno et al. | Functional and environmental performance of plant-produced crumb rubber asphalt mixtures using the dry process | |
| CN111239322A (en) | Evaluation device and evaluation method for indoor degradation effect of odorless smoke suppressant on asphalt smoke | |
| Wang et al. | Study on characteristics and microscopic mechanism of composite environment-friendly dust suppressant for urban construction site soil fugitive dust based on response surface methodology optimization | |
| Lu et al. | High-temperature properties and aging resistance of rock asphalt ash modified asphalt based on rutting index | |
| Liang et al. | The underappreciated role of fugitive VOCs in ozone formation and health risk assessment emitted from seven typical industries in China | |
| Tang et al. | Molecular dynamics simulation and experimental analysis on fluidity improvement of liquid rubber modified asphalt binder | |
| Niu et al. | Seasonal variations and risk assessment of heavy metals in PM2. 5 from Handan, China | |
| Li et al. | Optimizing parameters for the preparation of low viscosity rubber asphalt incorporating waste engine oil using response surface methodology | |
| CN105527412A (en) | Bitumen fume measuring method in mixing process of bituminous mixture | |
| Yang et al. | Review on nano clay modified asphalt based on flame retardant and smoke suppression | |
| CN111925562A (en) | Synergistic inhibition method of flame-retardant warm mixing agent on thermal decomposition of asphalt mixture | |
| Jalalian Khoshnood et al. | Evaluation of performance characteristics of polymer-modified slurry seal (PMSS) by replacing filler with ceramic waste powder | |
| CN115353747B (en) | Low-volatility smell asphalt and preparation method thereof | |
| CN107010876B (en) | A kind of high-modulus oil resistant corrosion asphalt and preparation method thereof | |
| Gan et al. | Influence of aggregate and asphalt type on the bond strength between asphalt and aggregates and its self-healing properties | |
| Xie et al. | Harmful emissions of rubber asphalt at high temperatures: A review | |
| Liang et al. | Influence of smoke suppressant on the smoke inhibition effect and properties of different types of asphalt | |
| Li et al. | Analysis of low-temperature rheological and mechanical properties of steel slag asphalt mixture based on direct tensile test | |
| Sun et al. | Heavy particulate matter pollution during the 2014–2015 winter in Tianjin, China |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210329 Address after: 100044 No. 1, Xicheng District exhibition museum, Beijing Applicant after: Beijing University of Civil Engineering and Architecture Applicant after: Guizhou Qiangui Expressway Maintenance Co.,Ltd. Applicant after: Puyang Highway Administration Bureau Address before: 100044 No. 1, Xicheng District exhibition museum, Beijing Applicant before: Beijing University of Civil Engineering and Architecture |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200605 |