CN113702207A - Evaluation method and test device for storage stability of finished asphalt cold-patch material - Google Patents
Evaluation method and test device for storage stability of finished asphalt cold-patch material Download PDFInfo
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- CN113702207A CN113702207A CN202110920497.9A CN202110920497A CN113702207A CN 113702207 A CN113702207 A CN 113702207A CN 202110920497 A CN202110920497 A CN 202110920497A CN 113702207 A CN113702207 A CN 113702207A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 238000003860 storage Methods 0.000 title claims abstract description 30
- 238000011156 evaluation Methods 0.000 title claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 46
- 230000001174 ascending effect Effects 0.000 claims description 9
- 238000013500 data storage Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000013480 data collection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- 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
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Abstract
The invention discloses a storage stability evaluation method of a finished asphalt cold-patch material, which comprises the following steps of (1) taking a sample to be tested of a fresh asphalt cold-patch material, and testing a torque strength value by using a torque strength testing device to obtain the torque strength value of the sample to be tested; (2) determining the Marshall stability value of the same batch of samples; (3) measuring the torque intensity value and the Marshall stability value of the sample to be measured under the real-time storage condition; (4) calculating a torque intensity ratio and a Marshall stability ratio; (5) and evaluating the storage stability of the sample to be tested through the torque intensity ratio and the Marshall stability ratio. Meanwhile, the invention also discloses a torque strength testing device. According to the invention, based on two evaluation indexes of the torque intensity ratio and the Marshall stability ratio, the storage stability of the finished product asphalt cold-patch material can be evaluated more objectively through the evaluation of the double-control index, and the evaluation result is more reliable and scientific and has strong practicability. The asphalt cold-patch mixing torque intensity test equipment is simple to operate and convenient to test, and can test the torque intensity of different materials.
Description
Technical Field
The invention relates to the technical field of asphalt pavement maintenance, in particular to a method and a test device for evaluating storage stability of a finished asphalt cold-patch material.
Background
With the gradual progress of the road traffic industry in the stages of 'construction and re-construction' and even 'mainly' maintenance, pavement maintenance materials and technologies become urgent needs. Asphalt pavements are adopted for more than 90% of high-grade roads, urban main roads and the like, pits are one of the most common diseases, and the traditional repairing material mainly adopts hot-mix asphalt mixture, but needs to be stirred and constructed at high temperature, consumes a large amount of energy, generates a large amount of smoke dust, waste gas and heat, is not beneficial to realizing the carbon neutralization target, and is limited in pavement maintenance engineering. The asphalt cold-patch material can complete the operations of various links of mixing, paving, rolling, forming and the like of a mixture in a normal temperature environment, is simple and convenient to construct, has strong weather applicability, better repairing quality, can be prefabricated into a finished product material, can be taken and used immediately, greatly meets the requirements of site construction, and is one of key materials of future asphalt pavement maintenance engineering.
For the performance evaluation of the cold patch asphalt mixture, a relatively perfect technical specification is still lacked, for example, a road asphalt pavement construction technical specification (JTG F40-2004) and an asphalt pavement pit cold patch finished product material (JT/T972-. In order to better promote the application of the asphalt cold-patch material in the maintenance engineering and perfect the quality evaluation system, a test method for determining the storage stability of the finished asphalt cold-patch material needs to be researched to evaluate whether the quality of the finished asphalt cold-patch material meets the technical requirements after the finished asphalt cold-patch material is stored for a plurality of times.
Disclosure of Invention
The invention aims to: aiming at the problems, the method for evaluating the storage stability of the finished asphalt cold-patch material is simple to operate and convenient to test, and adopts double-control index evaluation.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a storage stability evaluation method for finished asphalt cold-patch materials comprises the following steps:
(1) taking a sample to be tested of the freshly mixed asphalt cold-patch material, using a torque strength testing device to test a torque strength value, and obtaining the torque strength value N of the sample to be tested0；
(2) Taking the same batch of samples to be detected, determining the Marshall stability value, and obtaining the Marshall stability value MS of the samples to be detected0；
(3) Taking samples to be detected in the same batch, and storing the samples for a period of time at the temperature of 28-32 ℃;
(4) measuring the torque intensity value and Marshall stability value of the sample to be measured under the real-time storage condition to obtain the real-time torque intensity value N of the sample to be measuredtAnd real-time Marshall stability value MSt；
(5) According to the obtained torque intensity value N0And a real-time torque strength value NtCalculating the torque intensity ratio eta based on the obtained Marshall stability value MS0And real-time Marshall stability value MStCalculating a marshall stability ratio ζ;
(6) the storage stability of the test sample was evaluated by the torque intensity ratio η and the marshall stability ratio ζ.
Preferably, the torque intensity ratio η ═ Nt/N0X 100%, the Marshall stability ratio Zeta ═ MSt/MS0×100％。
Preferably, the torque intensity ratio eta is less than or equal to 105 percent and the Marshall stability ratio zeta is more than or equal to 95 percent, and the storage stability of the finished asphalt cold-patch material in the corresponding storage time is judged to meet the requirement.
The application also provides a torque intensity test device which comprises a frame supporting device, an operation module arranged on the right side of the frame supporting device and a detection module arranged on the left side of the frame supporting device, wherein the operation module is electrically connected with the detection module; the detection module comprises an asphalt cold-patch container, a stirring device, a torque intensity testing system and a temperature control system, wherein the asphalt cold-patch container is arranged on the upper surface of the frame supporting device, one end of the stirring device is arranged in the asphalt cold-patch container, the other end of the stirring device is arranged on the upper surface of the frame supporting device, the torque intensity testing system is arranged on the stirring device, and the temperature control system is arranged in the asphalt cold-patch container.
Preferably, the operation module comprises an equipment control platform, a data display screen is arranged on the upper surface of the equipment control platform, and a control button is arranged on the right side of the data display screen. The data display screen comprises a temperature setting interface, a data display interface and the like. The temperature setting interface is mainly used for setting the temperature required by the test; the data display interface is mainly used for displaying torque data in real time and drawing a torque intensity-time curve.
Preferably, the control keys include a power button, a temperature button, a rise button, a fall button, a start button, a pause button, and a stop button. The power button mainly controls the power of the device to be switched on and off. The ascending button and the descending button are mainly used for controlling the ascending and descending of the stirring shaft, and both the ascending position and the descending position are provided with a limiter, so that the stirring shaft can automatically stop after ascending or descending for positioning and moving; the start button, the pause button and the stop button are mainly used for controlling the three running states of starting, pausing and stopping of the stirring shaft; the temperature button is mainly used for starting or stopping the heating function of the equipment, and when the temperature of the equipment reaches the set temperature, the heating function can be automatically cut off.
Preferably, agitating unit includes top cap, power supply unit, (mixing) shaft and helical blade, helical blade fixed weld in the (mixing) shaft lower extreme, the top cap sets up in the top of (mixing) shaft, power supply unit sets up in the top cap. The helical blade is fixedly welded at the lower end of the stirring shaft, and the upper end of the stirring shaft is connected with the power supply device which is driven by the power supply device to rotate at a constant speed. The top cover and the stirring shaft are integrally arranged, the appearance of the top cover is matched with that of the stirring pot, a good closed space can be formed with the stirring pot during operation, and heat preservation of the asphalt cold-patch material in the stirring pot is realized. The power supply power device comprises 2 power supply devices, mainly provides power supply and power for normal operation of equipment, and can drive the stirring device to rotate at a constant speed and lift up and down.
Preferably, still including supporting the horizontal pole and supporting the montant, the one end and the top cap of supporting the horizontal pole are connected, and the other end is connected with the top of supporting the montant, and the bottom of supporting the montant sets up the upper surface at operating module.
Preferably, the torque intensity testing system comprises a torque tester and a data storage system, the torque tester is arranged on the stirring shaft below the top cover, and the data storage system is electrically connected with the torque tester. The torque tester is used for acquiring torque intensity data generated during stirring in real time and storing the data through the data storage system.
Preferably, the pitch cold patch material container is the cylindric agitated kettle that the bottom is the same diameter ball shape, the agitated kettle is cavity bilayer formula, including inlayer, cavity layer and skin, the cavity layer has evenly arranged temperature control system. The temperature control system comprises heat conduction pipes and a temperature acquisition instrument, the heat conduction pipes are uniformly arranged in a hollow layer of the stirring pot, and the temperature acquisition instrument is used for acquiring temperature data in real time.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) the method for evaluating the storage stability of the finished product asphalt cold-patch material based on the two evaluation indexes of the torque strength ratio and the Marshall stability ratio can evaluate the storage stability of the finished product asphalt cold-patch material more objectively through the evaluation of the double-control index, the evaluation result is more reliable and scientific, the practicability is good, the popularization is strong, and ideas and beneficial references are provided for evaluating the storage stability of the finished product asphalt cold-patch material.
(2) The asphalt cold-patch mixing torque strength test equipment is simple to operate and convenient to test, and can test the torque strength of different materials.
Drawings
FIG. 1 is a schematic view of the torque intensity testing apparatus of the present invention;
in the attached figure, 1-frame supporting device, 2-asphalt cold-patch container, 3-temperature control system, 4-stirring device, 4.1-stirring shaft, 4.2-helical blade, 5-torque strength test system, 6-power supply device, 7-top cover, 8-equipment control platform, 8.1-data display screen, 8.2-power button, 8.3-temperature button, 8.4-rising button, 8.5-falling button, 8.6-starting button, 8.7-pause button and 8.8-stopping button.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
Example 1
As shown in fig. 1, the torque intensity testing apparatus applied to the evaluation method of the present invention includes a frame support device 1, an operation module disposed on the right side of the frame support device 1, and a detection module disposed on the left side of the frame support device 1, the operation module and the detection module being electrically connected; the detection module comprises an asphalt cold-patch container 2, a stirring device 4, a torque intensity testing system 5 and a temperature control system 3, wherein the asphalt cold-patch container 2 is arranged on the upper surface of the frame supporting device 1, one end of the stirring device 4 is arranged in the asphalt cold-patch container 2, the other end of the stirring device 4 is arranged on the upper surface of the frame supporting device 1, the torque intensity testing system 5 is arranged on the stirring device 4, and the temperature control system 3 is arranged in the asphalt cold-patch container 2; agitating unit 4 includes top cap 7, power supply unit 6, (mixing) shaft 4.1 and helical blade 2, helical blade 2 fixed weld in (mixing) shaft 4.1 lower extreme, top cap 7 sets up in (mixing) shaft 4.1's top, power supply unit 6 sets up in top cap 7. Helical blade 2 is fixed to be welded in (mixing) shaft 4.1 lower extreme, and (mixing) shaft 4.1 upper end is connected in power supply unit 6, is driven its at the uniform velocity by power supply unit 6 and rotates. The top cover 7 and the stirring shaft 4.1 are integrally arranged, the appearance of the top cover is matched with the asphalt cold-patch material container 2, and a good closed space can be formed with the asphalt cold-patch material container 2 during working, so that the heat preservation of the asphalt cold-patch material in the asphalt cold-patch material container 2 is realized. The number of the power supply power devices 6 is 2, which mainly provide power supply and power for the normal operation of the equipment and can drive the stirring device 4 to rotate at a constant speed and lift up and down; the device also comprises a supporting cross rod and a supporting vertical rod, wherein one end of the supporting cross rod is connected with the top cover 7, the other end of the supporting cross rod is connected with the top end of the supporting vertical rod, and the bottom end of the supporting vertical rod is arranged on the upper surface of the operation module; the torque intensity testing system 5 comprises a torque tester and a data storage system, the torque tester is arranged on the stirring shaft 4.1 below the top cover 7, and the data storage system is electrically connected with the torque tester. The torque tester is used for acquiring torque intensity data generated during stirring in real time and storing the torque intensity data through the data storage system; the pitch cold-patch material container 2 is the cylindric agitated kettle that the bottom is the same diameter ball shape, the agitated kettle is cavity bilayer formula, including inlayer, hollow layer and skin, temperature control system 3 has evenly been arranged to the hollow layer. Temperature control system 3 includes heat pipe and temperature data collection appearance, and the heat pipe evenly arranges in the agitated kettle hollow layer, and temperature data is used for gathering in real time to the temperature data collection appearance.
The operation module comprises an equipment control platform 8, wherein a data display screen 8.1 is arranged on the upper surface of the equipment control platform 8, and a control button is arranged on the right side of the data display screen 8.1. The data display screen 8.1 comprises a temperature setting interface, a data display interface and the like. The temperature setting interface is mainly used for setting the temperature required by the test; the data display interface is mainly used for displaying torque data in real time and drawing a torque intensity-time curve; the control keys include a power button 8.2, a temperature button 8.3, a raise button 8.4, a lower button 8.5, a start button 8.6, a pause button 8.7 and a stop button. The power button 8.2 mainly controls the power of the device to be switched off and on. The ascending button 8.4 and the descending button 8.5 are mainly used for controlling the ascending and descending of the stirring shaft 4.1, and both the ascending position and the descending position are provided with a limiter, so that the stirring shaft can automatically stop after ascending or descending for positioning and moving; the start button 8.6, the pause button 8.7 and the stop button 8.8 are mainly used for controlling the three running states of starting, pausing and stopping of the stirring shaft 4.1; the temperature button 8.3 is mainly used for starting or stopping the heating function of the equipment, and when the temperature of the equipment reaches the set temperature, the heating function is automatically cut off.
The torque intensity test device is mainly used for carrying out the torque intensity test of the asphalt cold-patch material through the following steps:
(1) the external power supply is switched on, and the power supply button is pressed to enable the power supply of the equipment to be in a switched-on state.
(2) The temperature setting interface is opened and the test temperature is set, typically at 30 ℃.
(3) The asphalt cold mix was added to the stirred tank, typically taking 2 kg. And when the descending button is pressed down, the stirring shaft and the top cover descend to the lower limiter, and the top cover and the stirring pot are just matched and sealed at the moment.
(4) After reaching the test temperature, preserving the heat for at least 4 hours; in order to accelerate the test progress, the test materials can be placed in other heat-preservation boxes in advance for heat preservation.
(5) The start button is pressed, and the stirring shaft starts to stir. The torque tester collects torque intensity values in real time, stores the torque intensity values in the data storage system, and displays a torque intensity-time curve in the data display screen.
(6) When the torque intensity data is substantially stable, the torque intensity value recorded at this time is read as a measured value Nx.
(7) Pressing the button to stop the stirring shaft; the 'up' button is pressed, and the stirring shaft and the top cover are lifted to the upper limit device.
(8) Cleaning up the asphalt cold-patch material in the stirring pot.
(9) The "power" button is pressed, at which point the device is powered off and the test is complete.
A method for evaluating the storage stability of a finished asphalt cold-patch material comprises the following steps:
(1) mixing the asphalt cold-patch material according to the material formula, taking a part of the materials to test the torque strength value of the fresh asphalt cold-patch material, making 5 test samples, removing the maximum value and the minimum value, and recording the average value of the three samples as the torque strength value N of the fresh asphalt cold-patch material0。
(2) Taking a part of materials to test the Marshall stability value of the cold-fed material of the fresh-mixed asphalt, and determining the Marshall stability value MS of the cold-fed material according to the current specification0。
(3) Meanwhile, the other part of the materials is put into a sealing bag, and the asphalt cold-patch material is placed in a shady and cool environment at the temperature of 30 ℃, and the storage time can be set according to the requirement.
(4) After the asphalt is stored for a set time, the torque strength value N of the asphalt cold-patch material stored for a plurality of times is respectively measured according to the methodtAnd Marshall stability value MSt。
(5) Calculating the torque intensity ratio eta-Nt/N0X 100% and Marshall stability ratio ζ ═ MSt/MS0×100％。
(6) And if the torque intensity ratio eta is less than or equal to 105 percent and the Marshall stability ratio zeta is more than or equal to 95 percent, judging that the storage stability of the finished product asphalt cold-patch material in the storage time meets the requirement. Otherwise, judging that the storage stability of the finished product asphalt cold-patch material in the storage time does not meet the requirement.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. A method for evaluating the storage stability of a finished asphalt cold-patch material is characterized by comprising the following steps: the method comprises the following steps:
(1) taking a sample to be tested of the freshly mixed asphalt cold-patch material, using a torque strength testing device to test a torque strength value, and obtaining the torque strength value N of the sample to be tested0；
(2) Taking the same batch of samples to be detected, determining the Marshall stability value, and obtaining the Marshall stability value MS of the samples to be detected0；
(3) Taking samples to be detected in the same batch, and storing the samples for a period of time at the temperature of 28-32 ℃;
(4) measuring the torque intensity value and Marshall stability value of the sample to be measured under the real-time storage condition to obtain the real-time torque intensity value N of the sample to be measuredtAnd real-time Marshall stability value MSt；
(5) According to the obtained torque intensity value N0And a real-time torque strength value NtCalculating the torque intensity ratio eta based on the obtained Marshall stability value MS0And real-time Marshall stability value MStCalculating a marshall stability ratio ζ;
(6) the storage stability of the test sample was evaluated by the torque intensity ratio η and the marshall stability ratio ζ.
2. The finished asphalt cold-patch storage stability evaluation method according to claim 1, characterized in that: the torque intensity ratio eta is Nt/N0X 100%, the Marshall stability ratio Zeta ═ MSt/MS0×100％。
3. The finished asphalt cold-patch storage stability evaluation method according to claim 2, characterized in that: the torque intensity ratio eta is less than or equal to 105 percent, and the Marshall stability ratio zeta is more than or equal to 95 percent, and the storage stability of the finished product asphalt cold-patch material in the corresponding storage time is judged to meet the requirement.
4. A torque intensity test device is characterized in that: the device comprises a frame supporting device, an operation module arranged on the right side of the frame supporting device and a detection module arranged on the left side of the frame supporting device, wherein the operation module is electrically connected with the detection module; the detection module comprises an asphalt cold-patch container, a stirring device, a torque intensity testing system and a temperature control system, wherein the asphalt cold-patch container is arranged on the upper surface of the frame supporting device, one end of the stirring device is arranged in the asphalt cold-patch container, the other end of the stirring device is arranged on the upper surface of the frame supporting device, the torque intensity testing system is arranged on the stirring device, and the temperature control system is arranged in the asphalt cold-patch container.
5. The torque strength testing apparatus according to claim 4, characterized in that: the operation module comprises an equipment control platform, a data display screen is arranged on the upper surface of the equipment control platform, and a control button is arranged on the right side of the data display screen.
6. The torque strength testing apparatus according to claim 5, characterized in that: the control keys comprise a power button, a temperature button, an ascending button, a descending button, a starting button, a pause button and a stop button.
7. The torque strength testing apparatus according to claim 4, characterized in that: the stirring device comprises a top cover, a power supply device, a stirring shaft and a spiral blade, wherein the spiral blade is fixedly welded at the lower end of the stirring shaft, the top cover is arranged above the stirring shaft, and the power supply device is arranged in the top cover.
8. The torque strength testing apparatus according to claim 7, characterized in that: the support structure is characterized by further comprising a support transverse rod and a support vertical rod, wherein one end of the support transverse rod is connected with the top cover, the other end of the support transverse rod is connected with the top end of the support vertical rod, and the bottom end of the support vertical rod is arranged on the upper surface of the operation module.
9. The torque strength testing apparatus according to claim 4, characterized in that: the torque intensity testing system comprises a torque tester and a data storage system, the torque tester is arranged on the stirring shaft below the top cover, and the data storage system is electrically connected with the torque tester.
10. The torque strength testing apparatus according to claim 4, characterized in that: the pitch cold-patch material container is the cylindric agitated kettle that the bottom is the same diameter ball shape, the agitated kettle is cavity bilayer formula, including inlayer, hollow layer and skin, temperature control system has evenly been arranged to the hollow layer.
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