CN112964602A - Low-temperature asphalt mixture material performance pressure testing method - Google Patents
Low-temperature asphalt mixture material performance pressure testing method Download PDFInfo
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- CN112964602A CN112964602A CN202110150153.4A CN202110150153A CN112964602A CN 112964602 A CN112964602 A CN 112964602A CN 202110150153 A CN202110150153 A CN 202110150153A CN 112964602 A CN112964602 A CN 112964602A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a performance pressure test method for a low-temperature asphalt mixture material, and relates to the field of asphalt. The method for testing the performance pressure of the low-temperature asphalt mixture material comprises the following steps of: s1, preparing an experimental article to be used, and adding a contrast thermometer and a monitoring camera on the original basis; s2, connecting a contrast thermometer with the sample cylinder and the instrument respectively, and S3, adjusting and preparing the instrument before the experiment; s4, preparing an asphalt sample; s5, selecting a corresponding rotor according to the pre-estimated asphalt viscosity; through being provided with the surveillance camera head, aim at the display panel of instrument with the surveillance camera head, the preselection sets up the surveillance camera head into every interval 60s and shoots, and shoot 3 times, compare the result that the surveillance camera head reachs with computer data, guarantee the absolute accuracy of final viscosity data, through the setting more than, increased multiunit reference object, can improve the accurate degree of experimental data greatly, prevent that the experimentation from taking place the possibility of accurate working parameter mistake and experimental data dislocation.
Description
Technical Field
The invention relates to the technical field of asphalt mixtures, in particular to a method for testing the performance pressure of a low-temperature asphalt mixture material.
Background
The asphalt mixture is a composite material, mainly comprising asphalt, coarse aggregate, fine aggregate, mineral powder, and optionally polymer and wood cellulose; different structures are formed by mixing materials with different qualities and quantities and have different mechanical properties. The asphalt mixture is a generic name of a mixture prepared by mixing mineral aggregate and asphalt binder. The material is divided into continuous gradation and discontinuous gradation mixed materials according to the material composition and structure. The mixture is divided into dense gradation, semi-open gradation and open gradation according to the gradation composition and the void ratio of the mineral aggregate. The size of the nominal maximum particle size can be classified into extra coarse (nominal maximum particle size is larger than 37.5mm), coarse (nominal maximum particle size is 26.5mm or 31.5mm), medium (nominal maximum particle size is 16mm or 19mm), fine (nominal maximum particle size is 9.5mm or 13.2mm) and sand (nominal maximum particle size is smaller than 9.5mm) asphalt mixture. The apparatus for testing the pressure of the asphalt mixture is provided with a low-temperature box, a loading part, a servo control system and a computer part, and the reaction result can be directly observed through a pressure sensor.
The pressure performance test of the asphalt mixture needs to relate to measurement under different temperatures, the temperature is measured sequentially from high to low in the measurement, three groups of measurement data under each temperature need to be selected and the average value of the three groups of measurement data is taken, then a repeatability experiment and a reproducibility experiment are needed, the experimental processes need to strictly follow the standard of the experimental requirements, but the standard of taking other groups of data as a reference is still lacked in the current test process, so the pressure performance test method of the low-temperature asphalt mixture material is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for testing the performance pressure of a low-temperature asphalt mixture material, which solves the problem that reference data provided by other devices are lacked in the experimental process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a low-temperature asphalt mixture material performance pressure test method comprises the following steps:
s1, preparing an experimental article to be used, and adding a contrast thermometer and a monitoring camera on the original basis;
s2, connecting a contrast thermometer with the sample cylinder and the instrument respectively,
s3, adjusting and preparing an instrument before an experiment;
s4, preparing an asphalt sample;
s5, selecting a corresponding rotor according to the pre-estimated asphalt viscosity;
s6, pouring a prepared asphalt sample into a sample containing cylinder of the instrument;
s7, placing the rotor and the sample containing barrel which are prepared in advance into a drying oven, heating to a specified temperature, and keeping the temperature of the rotor and the sample containing barrel;
s8, taking out the rotor and the sample containing barrel to be installed on an instrument, measuring and comparing the temperature of the rotor and the temperature in the sample containing barrel through a comparison thermometer pre-installed on the sample containing barrel and the comparison thermometer on the instrument during installation, judging whether a comparison result meets the normal standard of an experiment, carrying out the next experiment if the comparison result meets the standard, carrying out measurement again by using the standard thermometer if the comparison result does not meet the normal standard, reheating if the comparison result does not meet the standard, and carrying out the next experiment if the comparison result meets the standard;
s9, presetting a prepared monitoring camera, and photographing an instrument recording panel at intervals of 60s, wherein the photographing times are set to three times;
s10, setting corresponding rotating speed on an instrument;
s11, observing the reading by a worker through a display panel on the instrument after the experiment is started;
s12, the experimental data are sorted and summarized, and the next work is carried out;
and S13, testing the temperature of each group to be tested according to the steps.
Preferably, the comparative thermometer referred to in S1 is a digital thermometer.
Preferably, in S3, before the experiment is started, the level of the instrument needs to be adjusted, whether the bubble of the level is centered is detected, and the power supply of the instrument temperature controller is turned on to set the corresponding temperature.
Preferably, in S6, the weight of the asphalt is converted into a mass according to the density of the sample, and the weight of the asphalt poured into the sample container is determined according to the specification of the asphalt.
Preferably, in S8, after the cartridge and the rotor are attached to the instrument, the rotor is lowered into the cartridge until the rotor is lowered to a predetermined position.
Preferably, in S11, it is determined whether the experiment is normal mainly by observing the torque reading on the display panel of the instrument, and during the period, the parameters during operation should not be changed, and finally the viscosity change is observed, and when the value of the viscosity tends to be stable, the monitoring camera is started to take a picture, and the staff also needs to start recording the data.
Preferably, in S13, the temperature to be tested in each group should be detected by high and low temperatures in order to achieve the best experimental data.
(III) advantageous effects
The invention provides a performance pressure test method for a low-temperature asphalt mixture material. The method has the following beneficial effects:
1. this kind of low temperature bituminous mixture material performance pressure test method, through being provided with two sets of contrast thermometers, and two sets of contrast thermometers are corresponding the rotor respectively and are holding the temperature in the appearance section of thick bamboo, through the contrast of two sets of contrast thermometers, can derive whether rotor and a flourishing appearance section of thick bamboo are in the temperature that the experiment required, strive for the interference of discharge temperature to the experiment is accurate, guarantee the precision of experimental data.
2. This kind of low temperature bituminous mixture material performance pressure test method, through being provided with the surveillance camera head, aim at the display panel of instrument with the surveillance camera head, the preselection sets up the surveillance camera head to shoot every interval 60s, and shoot 3 times, compare the result that the surveillance camera head reachs with computer data, guarantee the absolute accuracy of final viscosity data, through the setting more than, multiunit reference has been increased, can improve the accurate degree of experimental data greatly, prevent that the experimentation from taking place the possibility of accurate working parameter mistake and experimental data dislocation.
Detailed Description
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.
Example (b):
the embodiment of the invention provides a method for testing the performance pressure of a low-temperature asphalt mixture material, which comprises the following steps:
s1, preparing an experimental article to be used, and adding a contrast thermometer and a monitoring camera on the original basis;
s2, connecting a contrast thermometer with the sample cylinder and the instrument respectively,
s3, adjusting and preparing an instrument before an experiment;
s4, preparing an asphalt sample;
s5, selecting a corresponding rotor according to the pre-estimated asphalt viscosity;
s6, pouring a prepared asphalt sample into a sample containing cylinder of the instrument;
s7, placing the rotor and the sample containing barrel which are prepared in advance into a drying oven, heating to a specified temperature, and keeping the temperature of the rotor and the sample containing barrel;
s8, taking out the rotor and the sample containing barrel to be installed on an instrument, measuring and comparing the temperature of the rotor and the temperature in the sample containing barrel through a comparison thermometer pre-installed on the sample containing barrel and the comparison thermometer on the instrument during installation, judging whether a comparison result meets the normal standard of an experiment, carrying out the next experiment if the comparison result meets the standard, carrying out measurement again by using the standard thermometer if the comparison result does not meet the normal standard, reheating if the comparison result does not meet the standard, and carrying out the next experiment if the comparison result meets the standard;
s9, presetting a prepared monitoring camera, and photographing an instrument recording panel at intervals of 60s, wherein the photographing times are set to three times;
s10, setting corresponding rotating speed on an instrument;
s11, observing the reading by a worker through a display panel on the instrument after the experiment is started;
s12, the experimental data are sorted and summarized, and the next work is carried out;
and S13, testing the temperature of each group to be tested according to the steps.
S1, the comparison thermometer is a digital thermometer, S3, before the experiment begins, the instrument needs to be adjusted horizontally, whether the bubble of the level is centered is detected, the power supply of the temperature controller of the instrument is started, the corresponding temperature is set, S6, the weight of asphalt is converted into mass according to the density of a sample, then the weight of the asphalt poured into the sample containing cylinder is determined according to the specification of the asphalt, generally, the weight of 10g +/-0.2 g of the petroleum asphalt on a road needs to be poured into the sample containing cylinder, the weight of the modified asphalt needs to be weighed to be 13g +/-0.2 g, S8, after the sample containing cylinder and the rotor are installed on the instrument, the rotor is reduced into the sample containing cylinder until the sample containing cylinder is reduced to a specified position, a heat insulation cover needs to be installed on the instrument after the position is reduced, the position of the sample containing cylinder is in a constant temperature container of the instrument, and the temperature of the asphalt needs to reach the balance temperature required by the experiment, and must not be less than 15min, the rotational speed of the rotor on the apparatus needs to be set according to the specified value, if the LV type apparatus needs to set the rotational speed to 12r/min when measuring at 135 ℃, and for RV, HA and HB type apparatuses when measuring at 135 ℃, the rotational speed needs to be set to 20r/min, if the temperature is changed and measured at 60 ℃, the rotational speed of the rotor of the LV type apparatus is adjusted to 0.5r/min, in S11, whether the experiment is normal or not is judged mainly by observing the torque reading on the display panel of the apparatus, and the parameter during working must not be changed, finally observing the change of viscosity, starting the monitoring camera to prepare for photographing after the value of viscosity becomes stable, and the worker also needs to start recording the data, for the torque reading on the display panel of the apparatus, the normal working torque reading range is limited between 10% -98%, if the range of the torque reading is not within the range of 10% -98%, the rotor needs to be replaced or the rotating speed of the rotor needs to be reduced and the experiment is carried out again, for the value of the viscosity, the index tending to stability is that two digits after the decimal point of the viscosity value do not change, the viscosity value can be recorded when being stable, in S13, the temperature needs to be detected from high to low when each group of temperature needing to be tested is detected, so that the optimal experimental data can be reached, for the experimental data, the same asphalt sample is subjected to at least two parallel experiments, and the error is within the normal range, and the average value of the two experimental data is taken as the final measurement value.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A low-temperature asphalt mixture material performance pressure test method is characterized by comprising the following steps:
s1, preparing an experimental article to be used, and adding a contrast thermometer and a monitoring camera on the original basis;
s2, connecting a contrast thermometer with the sample cylinder and the instrument respectively,
s3, adjusting and preparing an instrument before an experiment;
s4, preparing an asphalt sample;
s5, selecting a corresponding rotor according to the pre-estimated asphalt viscosity;
s6, pouring a prepared asphalt sample into a prepared sample containing cylinder;
s7, placing the rotor and the sample containing barrel which are prepared in advance into a low-temperature oven, heating to a specified temperature, and keeping the temperature of the rotor and the sample containing barrel;
s8, taking out the rotor and the sample containing barrel to be installed on a testing instrument, measuring and comparing the temperature of the rotor and the temperature in the sample containing barrel through a comparison thermometer pre-installed on the sample containing barrel and the comparison thermometer on the instrument during installation, judging whether a comparison result meets the normal standard of an experiment, carrying out the next step of experiment if the comparison result meets the normal standard, carrying out measurement by reusing the standard thermometer if the comparison result does not meet the normal standard, reheating if the comparison result does not meet the normal standard, and carrying out the next step of experiment if the comparison result meets the standard;
s9, presetting a prepared monitoring camera, and photographing a recording panel of the instrument at intervals of 60s, wherein the photographing times are set to three times;
s10, setting corresponding rotating speed on an instrument;
s11, observing the reading by a worker through a display panel on the instrument after the experiment is started;
s12, the experimental data are sorted and summarized, and the next work is carried out;
and S13, testing the temperature of each group to be tested according to the steps.
2. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: the comparative thermometer referred to in S1 is a digital thermometer.
3. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: in S3, before the experiment begins, the level of the instrument needs to be adjusted, whether the bubble of the level is centered is detected, and the power supply of the instrument temperature controller is turned on and the corresponding temperature is set.
4. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: in S6, the weight of the asphalt is converted into a mass according to the density of the sample, and the weight of the asphalt poured into the sample-containing cylinder is determined according to the specification of the asphalt.
5. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: in S8, the sample container and the rotor are mounted on the instrument, and then the rotor is lowered into the sample container until the rotor is lowered to a predetermined position.
6. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: in S11, whether the experiment is normal or not is mainly judged by observing the torque reading on the display panel of the instrument, the parameters during working cannot be changed, the viscosity change is observed at last, the monitoring camera is started to shoot when the value of the viscosity tends to be stable, and the staff also needs to start recording the data.
7. The method for testing the performance pressure of the low-temperature asphalt mixture material according to claim 1, which is characterized by comprising the following steps of: in S13, it should be noted that the temperature needs to be detected from high to low for the best experimental data when detecting the temperature to be tested in each group.
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| CN202110150153.4A CN112964602A (en) | 2021-02-03 | 2021-02-03 | Low-temperature asphalt mixture material performance pressure testing method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694450A (en) * | 2009-10-16 | 2010-04-14 | 长安大学 | Method for detecting dose of polymers in modified asphalt based on viscosity-temperature curve |
| CN102507386A (en) * | 2011-11-10 | 2012-06-20 | 长安大学 | Method for measuring modifier content in SBS modified asphalt through adopting Brookfield rotary viscometric method |
| CN104360048A (en) * | 2014-11-07 | 2015-02-18 | 交通运输部科学研究院 | Method for evaluating performances of normal-temperature modified road asphalt |
| CN105547924A (en) * | 2015-12-09 | 2016-05-04 | 交通运输部科学研究院 | Method for evaluating performance of normal-temperature modified road asphalt |
-
2021
- 2021-02-03 CN CN202110150153.4A patent/CN112964602A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694450A (en) * | 2009-10-16 | 2010-04-14 | 长安大学 | Method for detecting dose of polymers in modified asphalt based on viscosity-temperature curve |
| CN102507386A (en) * | 2011-11-10 | 2012-06-20 | 长安大学 | Method for measuring modifier content in SBS modified asphalt through adopting Brookfield rotary viscometric method |
| CN104360048A (en) * | 2014-11-07 | 2015-02-18 | 交通运输部科学研究院 | Method for evaluating performances of normal-temperature modified road asphalt |
| CN105547924A (en) * | 2015-12-09 | 2016-05-04 | 交通运输部科学研究院 | Method for evaluating performance of normal-temperature modified road asphalt |
Non-Patent Citations (3)
| Title |
|---|
| 李耀辉等: "橡胶沥青粘度影响因素研究", 《西部交通科技》 * |
| 王文涛等: "旋转粘度试验影响因素与粘温曲线绘制研究", 《武汉理工大学学报(交通科学与工程版)》 * |
| 许新权等: "粉胶比对沥青胶浆高低温性能的影响", 《长安大学学报(自然科学版)》 * |
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Application publication date: 20210615 |