CN206594091U - The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures - Google Patents
The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures Download PDFInfo
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- CN206594091U CN206594091U CN201720138062.8U CN201720138062U CN206594091U CN 206594091 U CN206594091 U CN 206594091U CN 201720138062 U CN201720138062 U CN 201720138062U CN 206594091 U CN206594091 U CN 206594091U
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- thermal conductivity
- bitumen mixture
- tested
- measurement apparatus
- different temperatures
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Abstract
The utility model discloses a kind of measurement apparatus of thermal conductivity factor under asphalt different temperatures, and the measurement apparatus includes：Heat power supply device, data acquisition device and controller, heat power supply device are just set to tested bitumen mixture specimen, and radiant heat source is provided to tested bitumen mixture specimen；Data acquisition device is arranged on tested bitumen mixture specimen surface, the upper surface temperature data for gathering tested bitumen mixture specimen, the heat flow density data of underlaying surface temperature data and upper surface；Controller is electrically connected with data acquisition device, for determining the tested thermal conductivity factor of bitumen mixture specimen at different temperatures according to upper surface temperature data, underlaying surface temperature data and heat flow density data.The measurement apparatus provided by the utility model, can easily and accurately measure the thermal conductivity factor of asphalt different temperatures, and measurement result is true and reliable.
Description
Technical field
The utility model is related to asphalt material testing field, heat conduction under more particularly to a kind of asphalt different temperatures
The measurement of coefficient.
Background technology
Asphalt is a kind of temperature sensing material, and its physicochemical properties can change with the change of temperature.In reality
In, the easy rut of bituminous paving high temperature, low temperature characteristic easy to crack causes bituminous pavement design to be difficult to the requirement for meeting environment.
The main cause for causing bituminous paving temperature to change is the heat radiation in air, while bituminous paving is at different temperatures to warm
The reaction of radiation makes a big difference.Therefore the thermophysical property of Research on Asphalt Mixture at different temperatures seems extremely heavy
Will, what wherein thermophysical property was mostly important is exactly thermal conductivity factor.
Due to the heterogeneous mixture that asphalt is made up of building stones, miberal powder, pitch, and containing free in compound
Gap.Determine asphalt thermal conductivity factor, it is necessary to which complete asphalt is detected, and should not be by compound
Each component separate detection.
The method that asphalt thermal conductivity factor is measured by steady state measurement method, since it is desired that ensureing above and below asphalt
The stability of the temperature of bottom surface can only determine the pitch at a temperature and mix, it is necessary to longer time of measuring in one-shot measurement
The thermal conductivity factor of material is closed, needs to increase considerably experimental period if determining the thermal conductivity factor at other temperature.
The thermal conductivity factor of asphalt can also be measured by the heat-pole method in instantaneous measurement method, but heat-pole method is tested
In used electric furnace heating wire be a kind of exothermic material, due to electric furnace heating wire at very high temperature (red-hot state) work, having can
It is able to can blow；Moreover, determine thermal conductivity factor specimen molding when due to test specimen rolls state and it is difficult to ensure that electric furnace heating wire is in
Linear state, the electric furnace heating wire bent during energization can produce induction reactance effect, or even grind disconnected, influence measuring accuracy.Further, electric furnace heating wire quilt
It is preset in asphalt to take out and reuses.
It can also measure the thermal conductivity factor of asphalt by the flat band method in instantaneous measurement method, but experiment is used
It is heated by built-in heater wire resistance to heating flat board, by flat board transfer out come be not Uniform Heat density；
Moreover, heating flat board is directly contacted with asphalt, now need to consider the model of solid contact heat transfer, with actual road surface work
Suffered heat forms of radiation makes a big difference when making.
Therefore, how a kind of dress for the thermal conductivity factor that conveniently can accurately measure asphalt different temperatures is provided
Put, the technical problem as those skilled in the art's urgent need to resolve.
Utility model content
The purpose of this utility model is to provide a kind of measurement apparatus of thermal conductivity factor under asphalt different temperatures, can be square
Just the thermal conductivity factor of asphalt different temperatures is accurately measured.
To achieve the above object, the utility model provides following scheme：
The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures, for measuring tested asphalt examination
Part, the measurement apparatus includes：Heat power supply device, data acquisition device and controller, wherein,
The heat power supply device, is just set to the tested bitumen mixture specimen, for the tested asphalt
Test specimen provides radiant heat source；
The data acquisition device, is arranged on the tested bitumen mixture specimen surface, for gathering the tested drip
The upper surface temperature data of blue or green compound test specimen upper surface, the underlaying surface temperature number of the tested bitumen mixture specimen lower surface
According to the heat flow density data with the tested bitumen mixture specimen upper surface；
The controller, is electrically connected with the data acquisition device, for according to the upper surface temperature data, it is described under
Surface temperature data and the heat flow density data determine the heat conduction system of the tested bitumen mixture specimen at different temperatures
Number.
Optionally, the measurement apparatus also includes attemperator, and the tested bitumen mixture specimen is arranged on the guarantor
In warm device, the heat power supply device is just set to the top surface of the attemperator.
Alternatively, the measurement apparatus also includes temperature collection device, wherein,
The temperature collection device is arranged in the attemperator, for gathering the environment in the attemperator
Temperature data.
Optionally, the heat power supply device is the heat lamp of power adjustable.
Optionally, the measurement apparatus also includes display, and the display is connected with the controller, for aobvious in real time
Show upper surface temperature value, underlaying surface temperature value, heat flow density value and the tested bitumen mixture specimen at different temperatures
Thermal conductivity factor.
Optionally, the tested bitumen mixture specimen is the one-time formed rut plate test specimen of standard.
The specific embodiment provided according to the utility model, the utility model discloses following technique effect：
The utility model, as heat power supply device, can truly simulate asphalt in actual working state using radiant heat source
In the true heat radiation state that is subject to.Data acquisition device timing acquiring temperature data and surface heat flow at set time intervals
Density data, asphalt is calculated in different temperatures by controller according to the temperature data and surface heat flux data
Under thermal conductivity factor.Therefore, the measurement apparatus provided by the utility model, can easily and accurately measure asphalt different
The thermal conductivity factor of temperature, measurement result is true and reliable.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the structural representation of the measurement apparatus of the utility model embodiment 1；
Fig. 2 is the quartering measuring point artwork of the utility model embodiment 1；
Fig. 3 is the rule of Nine measuring point artwork of the utility model embodiment 1；
Fig. 4 is the attemperator structure chart of the utility model embodiment 1；
Fig. 5 is the flow chart of the thermal conductivity measurement method of the utility model embodiment 2.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The purpose of this utility model is to provide a kind of measurement apparatus of thermal conductivity factor under asphalt different temperatures, can be square
Just the thermal conductivity factor of asphalt different temperatures is accurately measured.
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
Embodiment 1：As shown in figure 1, the measurement apparatus of thermal conductivity factor includes under asphalt different temperatures：Heat power supply device
1st, data acquisition device, temperature collection device, attemperator 7, controller 8.
Wherein, data acquisition device includes：Temperature measuring device 2, heat flow density measuring equipment 3 and reading plotter 4；Environment
Temperature collecting device includes：Temperature collection device 5 and environment temperature reading plotter 6.
Tested bitumen mixture specimen 9 is arranged in attemperator 7, top surface of the heat power supply device 1 just to the attemperator 7
Set, heat power supply device 1 is used to provide stable heat radiation to tested bitumen mixture specimen 9 so that tested asphalt examination
Uniformly heat up the upper surface of part 9.Specifically, the heat power supply device 1 in embodiment 1 is the heat lamp of power adjustable.
Temperature measuring device 2 is arranged on the surface of tested bitumen mixture specimen 9, the upper table for measuring test specimen 9
Face and the temperature of lower surface；Heat flow density measuring equipment 3 is arranged on the upper surface of tested bitumen mixture specimen 9, for measuring
Heat flow density suffered by the upper surface of tested bitumen mixture specimen 9.Specifically, the temperature measuring device 2 in the present embodiment
For thermocouple sensor, required precision reaches 0.1 DEG C；Heat flow density measuring equipment 3 in the present embodiment is surface heat flux
Sensor, accuracy requirement reaches ± 2%；Tested bitumen mixture specimen 9 in the present embodiment is one-time formed using standard
Rut plate test specimen.
Reading plotter 4 is connected with the temperature measuring device 2, heat flow density measuring equipment 3 respectively, for showing tested drip
Hot-fluid suffered by the temperature value and tested bitumen mixture specimen upper surface of blue or green compound test specimen upper surface and lower surface is close
Angle value.Specifically, the reading plotter 4 in the present embodiment is Multi-channel hot flowmeter.
Controller 8 is electrically connected with reading plotter 4, controller 8 according under different temperatures be tested bitumen mixture specimen 9 it is upper
Surface temperature value, underlaying surface temperature value and heat flow density value, it is determined that the tested heat conduction of bitumen mixture specimen 9 at different temperatures
Coefficient.Specifically, the controller 8 in the present embodiment is computer system.Though it is related to computational methods herein, according to upper surface
Temperature value, underlaying surface temperature value and heat flow density value, it is determined that the tested thermal conductivity factor of bitumen mixture specimen at different temperatures
Belong to prior art.
Temperature collection device 5 is arranged in attemperator 7, for gathering the environment temperature in the attemperator 7
Data, environment temperature reading plotter 6 is used to show the temperature in attemperator 7.Specifically, the environment temperature in the present embodiment is adopted
Acquisition means 5 are thermocouple sensor, and environment temperature reading plotter 6 is digital temperature display instrument.
In the present embodiment, thermocouple sensor is being tested the table of bitumen mixture specimen 9 with surface heat flux sensor
The laying in face is considered as the type of asphalt, should then use quartering if compact-type, as shown in Figure 2；If big
Particle diameter high voidage then needs to use rule of Nine, as shown in Figure 3.From Fig. 2 and Fig. 3, quartering measuring point is laid and rule of Nine is surveyed
Point lays the thermocouple sensor for requiring upper and lower bottom surface on the same vertical line of top surface, and offset error is no more than 3mm.
Specifically, such as (a) in Fig. 4 partly and shown in (b) part, the attemperator 7 is specifically included：Shell 71, instead
The shell 71 of attemperator is enclosed on around tested bitumen mixture specimen 9, makes to be tested by light heat-insulation layer 72, test specimen heat-insulation layer 73
Bitumen mixture specimen 9 is in the center of shell 71, then by reflective heat-insulation layer 71, and test specimen heat-insulation layer 73 is separately positioned on tested
Between bitumen mixture specimen 9 and shell 71, so that the function of heat insulation to being tested the side of bitumen mixture specimen 9 is formed,
The material of wherein reflective heat-insulation layer 72 and test specimen heat-insulation layer 73 is heat preserving and insulating material.Heat power supply device 1 is arranged on attemperator 7 and pushed up
In the vertical direction of face center.
The utility model is by controlling the temperature in attemperator 7, and simulation is mixed close to pitch is tested during the working condition of road surface
The true heat radiation state suffered by material test specimen is closed, reading plotter 4 is with setting time interval time recording Temperature numerical and surface heat
Current density value, controller calculates the thermal conductivity factor of asphalt at different temperatures, at the same in real time display test data with
And result of calculation.
The process tested using the test device of the present embodiment specifically includes following steps：
Step 1：Eight K-type thermocouple sensors are used to the following table on test block of the asphalt adhesive in asphalt respectively
Face, plan-position be Fig. 3 in b, e, g and i, it is desirable to the thermocouple sensor of upper and lower bottom surface must top surface same vertical line
On.Two KR2 heat-flow density sensors are positioned over to the upper surface of tested bitumen mixture specimen, position such as Fig. 2.Attemperator
Thermocouple sensor in 7 is laid as shown in Figure 4.
Step 2：Tested bitumen mixture specimen is placed on same rut plate test specimen.
Step 3：By the casing of attemperator around test block, make test block in the center of shell, then will protect
Warm heat-barrier material is individually positioned between test block and shell, so as to form the function of heat insulation to test block side.By work(
The adjustable heat lamp of rate is placed in attemperator end face center vertical direction, distance test part upper surface 1m, wherein described
The peak power of heat lamp is 500W.
Step 4：Using HFM-215N heat-flow meters as reading plotter, the temperature that upper and lower surface thermocouple is sensed is read
Value, takes its average value as initial temperature.
Step 5：Infrared heating lamp switch (power is adjusted to 400W) and HFM-215N heat-flow meter writing functions are opened simultaneously, are made
Uniformly heat up on test block surface.Wherein HFM-215N heat-flow meters record time interval is 30s, and experimental period is 30min.
Step 6：Measured data substitution calculation formula is drawn by asphalt thermal conductivity factor by computer system.
Step 7：Heat lamp is closed, attemperator is opened in test specimen temperature drop to be measured to room temperature, takes out test specimen, knot
Beam is tested.
Wherein, it is identical with tested bitumen mixture specimen in one piece of tested bitumen mixture specimen bottom superposition in step 2
Rut plate test specimen, can the long heat-transfer path in the court of a feudal ruler, increase the big object one-dimensional heat conduction state of semo-infinite time.
Wherein, the time interval of reading plotter record data should be according to the heating of tested bitumen mixture specimen in step 5
Speed determines that experimental period must then judge by following two criterions：First, according to the big object one-dimensional heat conduction state of semo-infinite
Permeability-thickness formula：Estimation can heat duration, and wherein τ represents the time, and unit is s；δ represents specimen thickness, unit
m；α represents asphalt thermal diffusion coefficient, and unit is m2/s.Experimental period, which may not exceed the estimation, can heat duration, with
Ensure the establishment of the big object one-dimensional heat conduction state of semo-infinite；Second, when tested bitumen mixture specimen temperature has reached setting,
I.e. bituminous paving practical working situation when, stop experiment.
When the measurement apparatus provided using the utility model measures the thermal conductivity factor of asphalt, the temperature in attemperator
Degree should be controlled in setting, i.e., below the temperature of bituminous paving real work, otherwise should adjust the power of heater, open again
Begin to test.When the difference of the temperature measured by four thermocouples of tested bitumen mixture specimen upper surface diverse location is more than first
Given threshold, or the difference of heat flow density value that two pieces of heat-flow density sensors are sensed are more than the second given threshold, then should adjust
The position of whole heater, restarts experiment.
The utility model simulates true heat suffered during close to road surface working condition by controlling the temperature in attemperator
Radiation regimes.Reading plotter time recording Temperature numerical and surface heat flux, computer system calculate asphalt and existed
Thermal conductivity factor under different temperatures, and changed and output result by computer system displaying data in real-time.
Using heat lamp as heat power supply device, heat suffered in actual working state is disturbed with asphalt
It is similar, while by the reflective insulation effect of attemperator, Uniform Heat density can be formed on test block surface, so as to more
The accurate real thermal conductivity factor for determining asphalt.The utility model uses standard rut plate test specimen mixed as tested pitch
Material test specimen is closed, the making of test block is simplified, and damage will not be formed to tested bitumen mixture specimen, when thermal conductivity factor is surveyed
After the completion of examination, test specimen can be used for other experimental implementations, realize recycling.The measurement apparatus provided using the utility model can one
Secondary property rapidly and accurately determines the thermal conductivity factor of asphalt at different temperatures.
Embodiment 2：As shown in figure 5, according to the measurement apparatus of thermal conductivity factor under above-mentioned asphalt different temperatures, surveying
The measuring method of thermal conductivity factor includes under amount asphalt different temperatures：
Step 501：Radiant heat source is provided to tested bitumen mixture specimen；
Step 502：Tested bitumen mixture specimen underlaying surface temperature data are obtained, while obtaining the tested pitch mixing
Expect the upper surface temperature data of the diverse location of test specimen at least two and the heat flow density data of at least two diverse locations；
Step 503：Judge whether the difference of the upper surface temperature data of the diverse location is more than the first given threshold, or institute
Whether the difference for stating the heat flow density data of diverse location is more than the second given threshold；
Step 504：If so, by the upper surface temperature data of the diverse location or the heat flow density number of the diverse location
According to removal, and send the position that alarm message reminding staff adjusts the heat power supply device；
Step 505：If it is not, exporting the upper surface temperature data, underlaying surface temperature data and heat flow density data；
Step 506：The quilt is determined according to the upper surface temperature data, underlaying surface temperature data and heat flow density data
Survey the thermal conductivity factor of bitumen mixture specimen at different temperatures.
Specifically, the operating procedure using thermal conductivity factor under above method measurement asphalt different temperatures is as follows：
Step 21：One group of thermocouple sensor is adhered into the upper and lower surface of tested bitumen mixture specimen, one group of thermocouple
Sensor is suspended in attemperator, and one group of heat-flow density sensor is positioned over tested bitumen mixture specimen upper surface；
Step 22：Tested bitumen mixture specimen is placed on one piece of same rut plate test specimen；
Step 23：Attemperator and heat power supply device placement are completed；
Step 24：The temperature that temperature measuring device is sensed is read with reading plotter；
Step 25：Heat power supply device and reading plotter, the temperature number on the tested bitumen mixture specimen surface of record are opened simultaneously
According to heat flow density data；
Step 26：Check whether temperature, the temperature on test specimen surface and heat flow density in attemperator meet pitch
The requirement of road surface practical working situation, the power of undesirable then adjustment heater position and heater, restarts
Experiment.
Step 27：The thermal conductivity value under different temperatures is calculated by controller, controller can show experiment in real time
Data, and output test result in real time.
Step 28：Test device is closed, bitumen mixture specimen temperature drop to be tested to room temperature is opened attemperator and taken
Go out test block, terminate experiment.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to principle of the present utility model and embodiment, above example
Explanation be only intended to help and understand method of the present utility model and its core concept；Simultaneously for the general technology of this area
Personnel, according to thought of the present utility model, will change in specific embodiments and applications.In summary,
This specification content should not be construed as to limitation of the present utility model.
Claims (6)
1. the measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures, for measuring tested bitumen mixture specimen,
Characterized in that, the measurement apparatus includes：Heat power supply device, data acquisition device and controller, wherein,
The heat power supply device, is just set to the tested bitumen mixture specimen, for the tested bitumen mixture specimen
Radiant heat source is provided；
The data acquisition device, is arranged on the tested bitumen mixture specimen surface, is mixed for gathering the tested pitch
Close the upper surface temperature data of material test specimen upper surface, the underlaying surface temperature data of the tested bitumen mixture specimen lower surface and
The heat flow density data of the tested bitumen mixture specimen upper surface；
The controller, is electrically connected with the data acquisition device, for according to the upper surface temperature data, the lower surface
Temperature data and the heat flow density data determine the thermal conductivity factor of the tested bitumen mixture specimen at different temperatures.
2. the measurement apparatus of thermal conductivity factor under asphalt different temperatures according to claim 1, it is characterised in that institute
Stating measurement apparatus also includes attemperator, and the tested bitumen mixture specimen is arranged in the attemperator, the thermal source
Device is just set to the top surface of the attemperator.
3. the measurement apparatus of thermal conductivity factor under asphalt different temperatures according to claim 2, it is characterised in that institute
Stating measurement apparatus also includes temperature collection device, wherein,
The temperature collection device is arranged in the attemperator, for gathering the environment temperature in the attemperator
Data.
4. the measurement apparatus of thermal conductivity factor under asphalt different temperatures according to claim 1, it is characterised in that institute
State the heat lamp that heat power supply device is power adjustable.
5. the measurement apparatus of thermal conductivity factor under asphalt different temperatures according to claim 1, it is characterised in that institute
Stating measurement apparatus also includes display, and the display be connected with the controller, for real-time display upper surface temperature value, under
Surface temperature value, the thermal conductivity factor of heat flow density value and the tested bitumen mixture specimen at different temperatures.
6. the measurement apparatus of thermal conductivity factor under asphalt different temperatures according to claim 1, it is characterised in that institute
Tested bitumen mixture specimen is stated for the one-time formed rut plate test specimen of standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138062.8U CN206594091U (en) | 2017-02-16 | 2017-02-16 | The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720138062.8U CN206594091U (en) | 2017-02-16 | 2017-02-16 | The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures |
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| Publication Number | Publication Date |
|---|---|
| CN206594091U true CN206594091U (en) | 2017-10-27 |
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| CN201720138062.8U Expired - Fee Related CN206594091U (en) | 2017-02-16 | 2017-02-16 | The measurement apparatus of thermal conductivity factor under a kind of asphalt different temperatures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770447A (en) * | 2017-02-16 | 2017-05-31 | 安徽省交通控股集团有限公司 | The measurement apparatus and method of thermal conductivity factor under a kind of asphalt different temperatures |
| CN107870179A (en) * | 2017-12-15 | 2018-04-03 | 扬州大学 | Method for measuring bituminous concrete thermal contact resistance |
-
2017
- 2017-02-16 CN CN201720138062.8U patent/CN206594091U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770447A (en) * | 2017-02-16 | 2017-05-31 | 安徽省交通控股集团有限公司 | The measurement apparatus and method of thermal conductivity factor under a kind of asphalt different temperatures |
| CN106770447B (en) * | 2017-02-16 | 2023-09-15 | 安徽省交通控股集团有限公司 | Device and method for measuring heat conductivity coefficients of asphalt mixture at different temperatures |
| CN107870179A (en) * | 2017-12-15 | 2018-04-03 | 扬州大学 | Method for measuring bituminous concrete thermal contact resistance |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190315 Address after: 230000 No. 520 Wangjiangxi Road, Hefei High-tech Development Zone, Anhui Province Patentee after: ANHUI TRANSPORTATION HOLDING GROUP CO., LTD. Address before: 230000 No. 520 Wangjiang West Road, Shushan District, Hefei City, Anhui Province Co-patentee before: South China University of Technology Patentee before: ANHUI TRANSPORTATION HOLDING GROUP CO., LTD. |
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Granted publication date: 20171027 Termination date: 20190216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |