CN101825591B - Rolling time tester for asphalt mixture and test method thereof - Google Patents
Rolling time tester for asphalt mixture and test method thereof Download PDFInfo
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- CN101825591B CN101825591B CN2010101854487A CN201010185448A CN101825591B CN 101825591 B CN101825591 B CN 101825591B CN 2010101854487 A CN2010101854487 A CN 2010101854487A CN 201010185448 A CN201010185448 A CN 201010185448A CN 101825591 B CN101825591 B CN 101825591B
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- asphalt
- temperature
- feed
- tube
- environmental cabinet
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Abstract
The invention discloses a press bearing time tester for asphalt mixture, comprising a charging barrel, a tamping unit, a temperature sensor, a data acquisition system and an environmental cabinet, wherein the charging barrel is a cylinder which is provided with grid mesh on inner wall; the tamping unit comprises a pressing plate which is equipped with a handrail on one side and a tamping bar on another side; an objective table and a fan are arranged at bottom of the environmental cabinet, the objective table is provided with a holder and an anemometer, the holder comprises an upper bottom side and an lower bottom side which are connected by a reinforcing steel bar, the centre of the upper bottom side is a round open hole with the diameter equal to the external diameter of the charging barrel, the anemometer is closely arranged beside the holder and the fan faces the holder and the anemometer; thermal radiation light source is arranged on the top side in the environmental cabinet; and the temperature sensor and the data acquisition system are connected. The invention also provides a test method, comprising preparatory stage, test stage, and test data analysis stage. The invention has simple test and maintenance.
Description
Technical field
The present invention relates to a kind of proving installation, be specifically related to a kind of measure asphalt device and the method for testing thereof of rolled time.
Background technology
The rolled time of asphalt refers to asphalt from mixing and stirring temperature to the time that stops rolling the temperature experience, and can fully roll asphalt be the key of guaranteeing the bituminous pavement quality, and this must have the enough time of rolling just can finish.In addition, it is remarkable to roll time difference at the asphalt of the same race of different time making, and as a kind of response to temperature material, the temperature variation of asphalt is subjected to such as the influence of factors such as temperature, wind speed and mix type remarkable.Therefore, at construction seasons characteristics and compound component characteristic, determine that the time of can rolling is most important to guaranteeing on-the-spot bituminous pavement service property (quality).Yet, at present not under external environment factor conditions such as the on-the-spot atmospheric temperature of construction simulation, wind speed, do not carry out the proving installation that asphalt rolls the time, study the proving installation that a kind of asphalt can roll the time and be necessary.
Summary of the invention
The objective of the invention is to, a kind of device that asphalt can roll the time of measuring is provided, this device is simulating natural condition more exactly, obtain temperature change condition of asphalt, utilize experimental data, simulate the cooling rule of asphalt, obtain asphalt and drop to and stop rolling the required time of temperature by mixing and stirring temperature, thereby drawing the rolled time of the asphalt under various different conditions, also is the rolled time of the pavement structure under the various different conditions.
In order to realize above-mentioned task, the present invention adopts following technical solution:
A kind of asphalt can roll the proving installation of time, and this proving installation comprises tube for feed, inserts and smash device, temperature sensor, data acquisition system (DAS) and environmental cabinet;
Described tube for feed is the cylinder frame, and this cylinder frame is made up of 8 vertical bars and base plate, and this tube for feed inwall is equipped with graticule mesh;
Described insert smash device and comprises pressing plate, and the one side of this pressing plate has handrail, and the another side of pressing plate has equally distributed tamper;
Objective table and fan are arranged at described environmental cabinet bottom, fixed mount and anemograph are arranged on the described objective table, described fixed mount comprises upper bottom surface and the bottom surface that is parallel to each other, between upper bottom surface and the bottom surface pillar is arranged, in the middle of the upper bottom surface is circular hollow, and the diameter of this circular hollow equals the external diameter of described tube for feed; Described anemograph is near the fixed mount setting, and described wafter is to described fixed mount and anemograph; The inside top surface of environmental cabinet is equipped with heat radiation light source;
Described temperature sensor is used to gather the temperature of the analog temperature and the asphalt of environmental cabinet, and this temperature sensor is connected with data acquisition system (DAS).
Described slotting smashing has 9 equally distributed tampers on the device.
Described pressing plate be shaped as circle.
Described heat radiation light source is iodine-tungsten lamp or UV-lamp.
Described upper bottom surface and bottom surface are square.
The proving installation that above-mentioned asphalt can roll the time is used for the method for testing that asphalt can roll the time, it is characterized in that, comprises the steps:
A, preparatory stage
A, environmental cabinet are prepared
Determine area to be evaluated temperature and the wind speed of some day according to the weather forecast in area to be evaluated, and be set analog temperature and simulation wind speed into environmental cabinet;
The supply voltage of check heat radiation light source and the stability of caloradiance;
Environment the temperature inside the box control: temperature sensor is connected to data acquisition system (DAS), when opening radiating light source environmental cabinet inside being heated to data acquisition system (DAS) display simulation temperature, stops heating;
Wind speed control in the environmental cabinet: open fan, regulate the gear of fan and be the simulation wind speed with reading that the distance of fixed mount shows to the anemograph;
Environmental cabinet is ready standby;
B, test specimen are prepared
According to " asphalt highway construction technique normalizing " design grating, preparation asphalt;
Prepare two baking ovens and one and mix and stir pot, the asphalt of preparation is put into first baking oven be warming up to 163 ℃, be incubated 5 hours standby;
Second baking oven is warming up to the mix temperature of asphalt, will mixes and stirs pot, insert and smash device to put into second baking oven insulation standby;
B, test phase
1) the fixing heat-insulation layer in the tube for feed outside;
2) asphalt is put into mixed and stirred a pot uniform mixing, and the test asphalt stops to mix and stir during to the mix temperature;
3) pour the asphalt that mixes into tube for feed, smash device and compound is carried out inserting for 5 times smash, insert and smash the degree of depth and successively decrease, until slotting puddling reality with the number of times increase with inserting;
4) be to insert a temperature sensor respectively on 45 8 radiuses of spending at the adjacent angle on the circular cross section of tube for feed, making the plane included angle between the adjacent sensors is 45 degree; The height that inserts is half of tube for feed height, and make the distance in the temperature sensor and the center of circle be respectively 0cm, 1cm ..., 7cm; Then described temperature sensor is connected on the data acquisition system (DAS); Tube for feed is put into second baking oven be incubated the temperature of mixing and stirring to asphalt;
5) take out the tube for feed that compound is housed from second baking oven, tube for feed is placed in the environmental cabinet of having simulated external condition at once, take off the outer heat-insulation layer of tube for feed when putting into, tube for feed is put into fixed mount, this moment, the temperature of asphalt was the mix temperature;
6) on data acquisition system (DAS), read the Temperature numerical that 8 temperature sensor measurements arrive every 5 minutes, be designated as T respectively
1, T
2, T
8, by formula 1 calculate weighted mean T, roll temperature until the weighted mean of asphalt less than the termination of asphalt;
Wherein, T is a weighted mean,
,
,
Be respectively the 1st, 2 ... 8 temperature that sensor records;
C, data analysis stage
With time is transverse axis, with the temperature is vertical pivot, obtain the time dependent curve of asphalt weighted mean T according to test gained data, and curve is estimated the performance of bitumen construction in view of the above, obtaining asphalt from figure is reduced to and stops rolling used time of temperature, i.e. the rolled time of asphalt from mixing and stirring temperature.
Advantage of the present invention:
1) environmental cabinet can accurately be simulated temperature and the wind condition with asphalt pavement construction, reduces error.
2) can measure the temperature of compound different depth, reflect asphalt temperature inside situation of change in real time.
3) can analyze the data that record, intuitively react the temperature variations of compound, can calculate the rolled time of the asphalt under the various different conditions.
4) data acquisition accurately, conveniently.
5) proving installation is simple in structure, use and easy to maintenance.
Description of drawings
Fig. 1 is that device of the present invention uses synoptic diagram.
Fig. 2 inserts to smash the apparatus structure synoptic diagram.
Fig. 3 inserts the vertical view of smashing device.
Fig. 4 is a temperature sensor insertion position vertical view.
Fig. 5 is an asphalt temperature time history plot.
Below in conjunction with accompanying drawing content of the present invention is further explained explanation.
Embodiment
As shown in Figure 1 to Figure 3, asphalt of the present invention can roll the proving installation of time, comprises tube for feed 1, inserts and smash device, temperature sensor, data acquisition system (DAS) 4 and environmental cabinet 5;
Tube for feed 1 is the cylinder frame, and this cylinder frame is made up of 8 vertical bars 2 and base plate 3, and this tube for feed 1 inwall is equipped with graticule mesh; Graticule mesh plays concentrated fixation to asphalt, and does not influence asphalt and fully contact with the simulated environment of environmental cabinet 5 in experimentation;
Insert and smash the pressing plate 13 that device comprises circle, the one side of this pressing plate 13 has handrail 10, and 9 of the another sides of pressing plate 13 have equally distributed tamper 11; The slotting device of smashing is used for the asphalt in the tube for feed 1 is inserted puddling in fact;
Objective table 6 and fan 7 are arranged at environmental cabinet 5 bottoms, and fixed mount 12 and anemograph 8 are arranged on the objective table 6, and fixed mount 12 comprises foursquare upper bottom surface that is parallel to each other 14 and bottom surface 15, between upper bottom surface 14 and the bottom surface 15 pillar 16 are arranged, and pillar 16 adopts reinforcing bar; In the middle of the upper bottom surface 14 is circular hollow, and the diameter of this circular hollow equals the external diameter of described tube for feed 1; Anemograph 8 is provided with near fixed mount 12, and fan 7 is towards described fixed mount 12 and anemograph 8; The inside top surface of environmental cabinet 5 is equipped with heat radiation light source 9, and heat radiation light source 9 adopts iodine-tungsten lamp or UV-lamp;
Temperature sensor is used to gather the temperature of the analog temperature and the asphalt of environmental cabinet 5, and this temperature sensor is connected with data acquisition system (DAS) 4.
Asphalt of the present invention can roll the method for testing of time, comprises the steps:
A, preparatory stage
A, environmental cabinet are prepared
According to the weather forecast in area to be evaluated obtain area to be evaluated some day temperature and wind speed numerical value, and be set analog temperature and simulation wind speed into environmental cabinet 5;
The supply voltage of check heat radiation light source 9 and the stability of caloradiance;
Temperature in the environmental cabinet 5 are by radiating light source 9 and temperature sensor control: temperature sensor is connected to data acquisition system (DAS) 4, opens 9 pairs of environmental cabinet inside of radiating light source when being heated to data acquisition system (DAS) 4 display simulation temperature, stop to heat;
Wind speed in the environmental cabinet 5 are by fan 7 and anemograph 8 controls: open fan 7, regulate the gear of fan 7 and be to simulate wind speed with it with reading that the distance of fixed mount 12 shows to the anemograph 8;
B, test specimen are prepared
According to " highway engineering pitch and asphalt testing regulations (JTG F40-2004) " design grating, preparation asphalt;
Prepare two baking ovens and one and mix and stir pot, the asphalt of preparation is put into first baking oven be warming up to 163 ℃, be incubated 5 hours standby;
Second baking oven is warming up to the mix temperature of asphalt, will mixes and stirs pot, insert and smash device to put into second baking oven insulation standby, purpose is to reduce temperature loss.
B, test phase
1) the fixing heat-insulation layer in tube for feed 1 outside, heat-insulation layer guarantee that the heat of asphalt does not does not scatter and disappear before the test;
2) asphalt is put into mixed and stirred a pot uniform mixing, and test, stop to mix and stir when making asphalt to the mix temperature;
3) pour the asphalt that mixes into tube for feed 1, smash device and compound is carried out inserting for 5 times smash, insert and smash the degree of depth and successively decrease, until slotting puddling reality with the number of times increase with inserting;
4) as shown in Figure 4, the circular cross section radius of tube for feed 1 is 8cm, is to insert a plug-in type temperature sensor respectively on 45 8 radiuses of spending at the adjacent angle on the circular cross section of tube for feed 1, and making the plane included angle between the adjacent sensors is 45 degree; The height that inserts is half of tube for feed 1 height, and make the distance in 8 temperature sensors and the center of circle be respectively 0cm, 1cm ..., 7cm, then described 8 temperature sensors are connected on the data acquisition system (DAS) 4; Tube for feed 1 is put into second baking oven be incubated the temperature of mixing and stirring to asphalt; Different temperature sensors from difference, can be indicated distance with adhesive plaster or red pen apart from distance of center circle in advance;
5) take out the tube for feed 1 that compound is housed from second baking oven, at once tube for feed 1 is put into the environmental cabinet of having prepared 5, take off the heat-insulation layer outside the tube for feed 1 when putting into, tube for feed 1 is put into fixed mount 12, the temperature of asphalt is for mixing and stirring temperature at this moment;
6) on data acquisition system (DAS) 4, read the Temperature numerical that 8 temperature sensor measurements arrive every 5 minutes, be designated as T respectively
1, T
2, T
8, by formula 1 calculate weighted mean T, roll temperature until the weighted mean T of asphalt less than the termination of asphalt;
Wherein, T is a weighted mean,
,
,
Be respectively the temperature that 8 sensors record;
C, data analysis stage
With time is transverse axis, with the temperature is vertical pivot, obtain the time dependent curve of asphalt weighted mean T according to test gained data, and curve is estimated the performance of bitumen construction in view of the above, from figure, obtain asphalt and be reduced to and stop rolling the used time of temperature, be the rolled time of asphalt from mixing and stirring temperature;
The result of testing experiment and analysis:
By " highway engineering pitch and asphalt testing regulations (JTG F40-2004) " design grating, adopt No. 90 pitch, its mix temperature is the 140-160 degree, and rolls about finishing temperature 60-75 degree (street roller different and roll the finishing temperature scope change) thereupon.In the present embodiment, for testing conveniently, the mix temperature of this asphalt is decided to be 150 ℃, its termination rolls temperature and is decided to be 75 ℃.According to method of testing of the present invention, begin to test the weighted mean T(unit of 8 plug-in type temperature sensors from 12:00 at moment t: ℃), recording weighted mean T to 13:00 is 71.875 ℃, less than stopping rolling temperature, stop test this moment, test result such as table 1:
Table 1 asphalt is measured temperature constantly at each
As shown in Figure 5, be transverse axis with time, with the temperature vertical pivot, obtain the time dependent curve of asphalt weighted mean T according to the test data shown in the table 1, and curve is estimated to the performance of bitumen construction in view of the above.Can obtain asphalt and be reduced to and stop rolling the used time of temperature from mixing and stirring temperature from Fig. 5, promptly the rolled time of asphalt is 56 minutes.
Claims (7)
1. an asphalt can roll the proving installation of time, it is characterized in that, this proving installation comprises tube for feed (1), inserts and smash device, temperature sensor, data acquisition system (DAS) (4) and environmental cabinet (5);
Described tube for feed (1) is the cylinder frame, and this cylinder frame is made up of 8 vertical bars (2) and base plate (3), and this tube for feed (1) inwall is equipped with graticule mesh;
Described insert smash device and comprises pressing plate (13), and the one side of this pressing plate (13) has handrail (10), and the another side of pressing plate (13) has equally distributed tamper (11);
Objective table (6) and fan (7) are arranged at described environmental cabinet (5) bottom, fixed mount (12) and anemograph (8) are arranged on the described objective table (6), described fixed mount (12) comprises upper bottom surface (14) and the bottom surface (15) that is parallel to each other, between upper bottom surface (14) and the bottom surface (15) pillar (16) is arranged, in the middle of the upper bottom surface (14) is circular hollow, and the diameter of this circular hollow equals the external diameter of described tube for feed (1); Described anemograph (8) is provided with near fixed mount (12), and described fan (7) is towards described fixed mount (12) and anemograph (8); The inside top surface of environmental cabinet (5) is equipped with heat radiation light source (9);
Described temperature sensor is used to gather the analog temperature of environmental cabinet (5) and the temperature of asphalt, and this temperature sensor is connected with data acquisition system (DAS) (4).
2. asphalt as claimed in claim 1 can roll the proving installation of time, it is characterized in that, described slotting smashing has 9 equally distributed tampers (11) on the device.
3. asphalt as claimed in claim 1 can roll the proving installation of time, it is characterized in that, described pressing plate (13) be shaped as circle.
4. asphalt as claimed in claim 1 can roll the proving installation of time, it is characterized in that, described heat radiation light source (9) is iodine-tungsten lamp or UV-lamp.
5. asphalt as claimed in claim 1 can roll the proving installation of time, it is characterized in that, described upper bottom surface (14) and bottom surface (15) are square.
6. the described asphalt of claim 1 can roll the method for testing of the proving installation of time, it is characterized in that, comprises the steps:
A, preparatory stage
A, environmental cabinet are prepared
Determine area to be evaluated temperature and the wind speed of some day according to the weather forecast in area to be evaluated, and be set analog temperature and simulation wind speed into environmental cabinet (5);
The supply voltage of check heat radiation light source (9) and the stability of caloradiance;
The interior temperature of environmental cabinet (5) control: temperature sensor is connected to data acquisition system (DAS) (4), when opening radiating light source (9) environmental cabinet inside being heated to data acquisition system (DAS) (4) display simulation temperature, stops heating;
The interior wind speed control of environmental cabinet (5): open fan (7), regulating the gear of fan (7) and going up the reading that shows with distance to the anemograph (8) of fixed mount (12) is the simulation wind speed;
Environmental cabinet (5) is ready standby;
B, test specimen are prepared
According to " asphalt highway construction technique normalizing " design grating, preparation asphalt;
Prepare two baking ovens and one and mix and stir pot, the asphalt of preparation is put into first baking oven be warming up to 163 ℃, be incubated 5 hours standby;
Second baking oven is warming up to the mix temperature of asphalt, will mixes and stirs pot, insert and smash device to put into second baking oven insulation standby;
B, test phase
1) the fixing heat-insulation layer in tube for feed (1) outside;
2) asphalt is put into mixed and stirred a pot uniform mixing, and the test asphalt stops to mix and stir during to the mix temperature;
3) asphalt that mixes is poured into tube for feed (1), smash device and compound is carried out inserting for 5 times smash, insert and smash the degree of depth and successively decrease, until slotting puddling reality with the number of times increase with inserting;
4) be to insert a temperature sensor respectively on 45 8 radiuses of spending at the adjacent angle on the circular cross section of tube for feed (1), making the plane included angle between the adjacent sensors is 45 degree; The height that inserts is half of tube for feed (1) height, described temperature sensor is connected on the data acquisition system (DAS) (4) then; Tube for feed (1) is put into second baking oven be incubated the temperature of mixing and stirring to asphalt;
5) take out the tube for feed (1) that compound is housed from second baking oven, tube for feed (1) is placed in the environmental cabinet (5) of having simulated external condition at once, take off the outer heat-insulation layer of tube for feed (1) when putting into, tube for feed (1) is put into fixed mount (12), and this moment, the temperature of asphalt was the mix temperature;
6) on data acquisition system (DAS) (4), read the Temperature numerical that 8 temperature sensor measurements arrive every 5 minutes, be designated as T respectively
1, T
2, T
8, by formula 1 calculate weighted mean T, roll temperature until the weighted mean of asphalt less than the termination of asphalt;
Wherein, T is a weighted mean, T
1, T
2, T
8Be respectively the 1st, 2,3 ..., 8 temperature that sensor records;
C, data analysis stage
With time is transverse axis, with the temperature is vertical pivot, obtain the time dependent curve of asphalt weighted mean T according to test gained data, and curve is estimated the performance of bitumen construction in view of the above, obtaining asphalt from described curve is reduced to and stops rolling used time of temperature, i.e. the rolled time of asphalt from mixing and stirring temperature.
7. method as claimed in claim 6 is characterized in that, described temperature sensor respectively with the distance of center circle of tube for feed (1) xsect from be respectively 0cm, 1cm ..., 7cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101854487A CN101825591B (en) | 2010-05-28 | 2010-05-28 | Rolling time tester for asphalt mixture and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101854487A CN101825591B (en) | 2010-05-28 | 2010-05-28 | Rolling time tester for asphalt mixture and test method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101825591A CN101825591A (en) | 2010-09-08 |
| CN101825591B true CN101825591B (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101854487A Expired - Fee Related CN101825591B (en) | 2010-05-28 | 2010-05-28 | Rolling time tester for asphalt mixture and test method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661965A (en) * | 2012-05-28 | 2012-09-12 | 哈尔滨工业大学 | Comprehensive indoor solar photo-thermal environment simulator for pavements |
| CN108732205A (en) * | 2018-05-23 | 2018-11-02 | 湖南工程学院 | A kind of warmth retention property evaluation system of wearing class haberdashery |
Citations (5)
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|---|---|---|---|---|
| US5356217A (en) * | 1992-12-04 | 1994-10-18 | The Edward Orton, Jr. Ceramic Foundation | Enthalpimetric analyzer and method of use |
| JP2002082102A (en) * | 2000-09-05 | 2002-03-22 | Kajima Corp | Low-temperature crack evaluating system and method |
| JP2002214173A (en) * | 2001-01-17 | 2002-07-31 | Toho Gas Co Ltd | Estimation method for penetration of asphalt |
| CN101256162A (en) * | 2008-03-20 | 2008-09-03 | 山东省交通科学研究所 | Method for measuring natural ganoine bitumen softening point |
| CN201181292Y (en) * | 2008-03-28 | 2009-01-14 | 南京工业大学 | Asphalt mixture workability index tester |
-
2010
- 2010-05-28 CN CN2010101854487A patent/CN101825591B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5356217A (en) * | 1992-12-04 | 1994-10-18 | The Edward Orton, Jr. Ceramic Foundation | Enthalpimetric analyzer and method of use |
| JP2002082102A (en) * | 2000-09-05 | 2002-03-22 | Kajima Corp | Low-temperature crack evaluating system and method |
| JP2002214173A (en) * | 2001-01-17 | 2002-07-31 | Toho Gas Co Ltd | Estimation method for penetration of asphalt |
| CN101256162A (en) * | 2008-03-20 | 2008-09-03 | 山东省交通科学研究所 | Method for measuring natural ganoine bitumen softening point |
| CN201181292Y (en) * | 2008-03-28 | 2009-01-14 | 南京工业大学 | Asphalt mixture workability index tester |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国交通部.公路工程沥青及沥青混合料试验规程.《中华人民共和国行业标准JTJ052-2000》.2000, * |
| 尹如军.沥青混合料有效压实时间的实测与分析.《沥青混合料有效压实时间的实测与分析》.2001,(第2期),37-41. * |
| 张超 等.环氧沥青及其混合料的时温性.《公路》.2009,(第3期),129-134. * |
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