CN112798639A - Frass brittle point instrument and test method thereof - Google Patents
Frass brittle point instrument and test method thereof Download PDFInfo
- Publication number
- CN112798639A CN112798639A CN202110200130.XA CN202110200130A CN112798639A CN 112798639 A CN112798639 A CN 112798639A CN 202110200130 A CN202110200130 A CN 202110200130A CN 112798639 A CN112798639 A CN 112798639A
- Authority
- CN
- China
- Prior art keywords
- temperature
- test tube
- test
- steel sheet
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 193
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 239000010426 asphalt Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims description 83
- 238000010438 heat treatment Methods 0.000 claims description 39
- 238000006073 displacement reaction Methods 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000002826 coolant Substances 0.000 claims description 22
- 235000019353 potassium silicate Nutrition 0.000 claims description 20
- 239000000110 cooling liquid Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 241000973497 Siphonognathus argyrophanes Species 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a Frass brittle point instrument and a test method thereof, wherein the Frass brittle point instrument comprises a strain control device, a sound control test device, a container base device and a temperature control device, the strain control device is matched with the sound control test device for use, a thin steel sheet is stretched and bent under the action of force moving at a constant speed, so that an asphalt sample on the thin steel sheet is uniformly bent and compressed, and the sound control test device is used for measuring the temperature of the asphalt sample and the decibel value during brittle fracture to obtain a more accurate test result; initial temperature in the parallel test process is controlled through the container base device and the temperature control device, and temperature change occurring in the test process is regulated and controlled, so that test errors are reduced, and test accuracy is effectively improved.
Description
Technical Field
The invention belongs to the technical field of test instruments or equipment for testing characteristics of asphalt materials, and particularly relates to a Frass brittleness point instrument and a test method thereof.
Background
The Fras brittleness point instrument is a test instrument for measuring Fras brittleness points of various asphalt materials, and is composed of a bending instrument, a thin steel sheet, a cooling device, a thermometer and other devices specified in the test specification of road engineering asphalt and asphalt mixture (JTG E20-2011).
However, the above-mentioned apparatus has the following disadvantages in the practical operation:
(1) during testing, the initial temperature inside the instrument is different, so that the error of the parallel test result is larger;
(2) the speed of manually rotating the crank handle is different, so that the fracture stress of the asphalt film is not uniform during the parallel test;
(3) when the test temperature is reduced to below zero, water mist appears on the surface of the test tube, and asphalt cracks are difficult to visually observe;
(4) when the asphalt film is bent by controlling the two ends of the bendable steel sheet to be compressed at a constant speed, the displacement of the weak position with the largest bending moment in the middle is not at a constant speed;
(5) the cooling device is difficult to realize stable temperature control after falling behind and is difficult to operate.
Therefore, it is necessary to redevelop the Frass crisp point instrument which is simple in operation and accurate in measurement result aiming at the defects of the existing standard.
Disclosure of Invention
Aiming at the technical defects of the existing Fras crisp point instrument, the invention provides the Fras crisp point instrument, which can accurately control the displacement of the cracked weak surface of the asphalt sample when the Fras crisp point instrument is used for asphalt crisp point tests, and the asphalt crisp point is measured by a sound control testing device, so that an accurate test result is obtained, and the accuracy of asphalt sample data detection is improved.
In order to achieve the technical purpose, the invention is realized by the following technical scheme:
a Frass crisp point instrument comprises a strain control device, a sound control testing device and a container base device;
the container base device comprises a test glass test tube and a glass base, the glass base is in a round tube shape, the top of the glass base is provided with an opening, the test glass test tube is placed in the glass base, and a test tube port is fixedly connected with the opening of the glass base through a fixing block; the strain control device comprises a strain controller, a fixed tube and a displacement rod, wherein the fixed tube is hollow and sealed at the top, a tube body of the fixed tube is arranged in a test glass test tube and is fixedly connected with the test glass test tube through a fixed block, one end of the displacement rod penetrates through the top wall of the fixed tube to be fixedly connected with the bottom of the strain controller, and the other end of the displacement rod is connected to the sound control test device; acoustic control testing arrangement includes steel sheet, a temperature decibel receiver and a temperature decibel sensing line, steel sheet fixed connection is in fixed bobbin base, and its one end swing joint who keeps away from strain controller towards test tube mouth one side and displacement rod, test glass test tube bottom is arranged in to a temperature decibel receiver, a temperature decibel sensing line one end is connected with a temperature decibel receiver, and the other end stretches out test glass test tube, with on the data transfer external equipment that a temperature decibel receiver received.
Compared with the Frass crisp point instrument in the prior art, the Frass crisp point instrument provided by the invention adopts the sound control test device and the strain control device, when the brittle point test is carried out on the asphalt, the strain control device is matched with the sound control testing device for use, the rotary strain controller rotates at a constant speed to drive the displacement rod to move at a constant speed, thereby the thin steel sheet is stretched and bent, the asphalt sample on the thin steel sheet is uniformly compressed and deformed, the displacement of the cracked weak surface of the asphalt sample is accurately controlled, the decibel peak value and the temperature of the crack of the weak surface of the asphalt sample are monitored by the temperature-decibel receiver, the brittle point temperature of the asphalt sample is obtained, the asphalt brittle point test is completed, the experimental result obtained by the proposal is more accurate, the error is small, the detection mode of traditional manual observation is changed, and the accuracy of the asphalt sample data detection by the instrument is greatly improved.
Further, container base device still includes water-bath heating glass test tube and coolant liquid glass test tube, and coolant liquid glass test tube and water-bath heating glass test tube are all installed in glass base, coolant liquid glass test tube cover is established outside test glass test tube, water-bath heating glass test tube cover is established outside coolant liquid glass test tube, and each test tube mouth passes through the fixed block with glass base and fixes. The cooling liquid glass test tube is sleeved outside the test glass test tube, the water bath heating glass test tube is sleeved outside the cooling liquid glass test tube, all test tubes are placed in the glass base, and all test tube ports are fixed together with the glass base through the fixing blocks to form a sleeve structure. And (3) pouring hot water into the water bath heating glass test tube, or pouring cooling liquid into the cooling liquid glass test tube to regulate and control the temperature in the test glass test tube.
Further, the crisp point instrument also comprises a temperature control device, wherein the temperature control device comprises a water bath heating device, a cooling liquid cooling device and a pipeline; the water bath heating device both ends are passed the fixed block through the pipeline and are connected with the relative both sides of water bath heating glass test tube, coolant liquid heat sink both ends are passed the fixed block through the pipeline and are connected with the relative both sides of coolant liquid glass test tube. Because water-bath heating glass test tube and coolant liquid cooling glass test tube are wrapping up the test glass test tube, hot water is injected into to water-bath heating glass test tube through the pipeline to water-bath heating device, and coolant liquid cooling controlling means injects the coolant liquid into to coolant liquid glass test tube through the pipeline, and the temperature of stable control test glass pipe makes the initial temperature of parallel experiment at every turn unanimous, avoids because of the different experimental error that leads to of initial temperature, improves experimental precision.
Further, the temperature control device further comprises a temperature regulation and control digital display device, the temperature regulation and control digital display device is installed on the water bath heating device, and the other end of the temperature one-decibel sensing line is connected to the temperature regulation and control digital display device. The temperature regulation and control digital display device can accurately master the environmental temperature of the test glass test tube and receive the information monitored by the temperature decibel receiver, thereby facilitating the development of subsequent tests and the regulation and control of temperature.
Further, the top of the fixed pipe is provided with a threaded hole, and the lower end of the strain gauge is provided with a thread matched with the threaded hole and is in threaded connection with the fixed pipe. The strain controller is connected with the fixed pipe through a spiral, and when the strain controller is rotated, the strain controller moves upwards at a constant speed to drive the displacement rod to move upwards at a constant speed, so that the phenomenon that stress is not uniform when an asphalt sample is fractured is avoided, the uniform compression at two ends of the thin steel sheet can be controlled, and the middle weak position with the maximum bending moment in the middle when an asphalt film is bent is displaced at a constant speed.
Further, the one end that strain controller was kept away from to the displacement pole is equipped with a couple, just the sheet steel is equipped with to the bellied ring of test tube mouth of pipe towards the central point of test tube mouth of sound one side, and the displacement pole passes through couple swing joint with the sheet steel. One end of the displacement rod is connected with the bottom of the strain controller, the other end of the displacement rod is connected with the thin steel sheet, when the strain controller is rotated to control the displacement rod to move upwards at a constant speed, the steel sheet is controlled to be stretched and deformed at a constant speed, so that an asphalt sample on the thin steel sheet is compressed and deformed at a constant speed, and in the process, a temperature-decibel receiver monitors the temperature of the asphalt sample and a decibel peak value generated when the asphalt sample is brittle-broken, so that a test result is obtained.
Furthermore, the sound control testing device also comprises a positioning steel sheet, wherein an outer ring of the positioning steel sheet is welded with the inner wall of the fixed pipe into a whole, the positioning steel sheet is fixed above the thin steel sheet, and the middle part of the positioning steel sheet is provided with a through hole matched with the diameter of the displacement rod.
The positioning steel sheet has the function of limiting the stretch bending deformation degree of the thin steel sheet, the center of the positioning steel sheet is provided with a through hole, the displacement rod is allowed to pass through, the rotary strain control device drives the displacement rod to move upwards, the displacement rod simultaneously pulls the thin steel sheet, so that the thin steel sheet deforms, when the thin steel sheet is pulled to be in contact with the positioning steel sheet, the thin steel sheet is stretched and bent to a certain limit, and the rotary strain controller resets.
Preferably, a plurality of vertical threads are arranged on the outer wall of the strain controller. Set up vertical screw on strain controller outer wall, increase the frictional force of outer wall, make things convenient for operating personnel to exert force when twisting the fixed pipe of strain controller rotation.
Preferably, the fixing block is made of rubber. Rubber is rich in elasticity, and when glass base and each test tube mouth fix, the leakproofness is better, and is difficult for shifting.
As described above, another object of the present invention is to provide a method for testing a fraysitter, which comprises the steps of:
1) preparing a thin steel sheet coated with an asphalt sample according to road engineering asphalt and asphalt mixture test procedures (JTG E20-2011);
2) installing the thin steel sheet coated with the asphalt sample on a fixed pipe, and assembling and fixing each device;
3) starting a temperature regulation and control digital display device and recording the initial temperature C0；
4) Starting a cooling liquid cooling device, and controlling the temperature reduction rate of the interior of the test glass test tube to be 1 ℃/min until the interior of the test glass test tube reaches about 10 ℃ before the predicted brittle point;
5) rotating the strain controller to control the displacement rod to move upwards at a constant speed until the thin steel sheet is contacted with the positioning steel sheet, and resetting the rotary strain controller;
6) the sound control testing device monitors the temperature of an asphalt sample in the stretch bending deformation process of the thin steel sheet and a decibel peak value generated in the brittle fracture process, and the corresponding temperature when the decibel peak value occurs is a brittle point C of the sample1；
7) Three groups of parallel tests are carried out on the same sample, and a water bath heating device is started to adjust the internal temperature of the test glass test tube to the initial temperature C0Repeating the steps to determine the brittle point value of the sample;
8) taking the mean value C of each parallel test resultaThe brittle point C of the asphalt sample was determined.
Through the test scheme, the test method provided by the invention is convenient to operate, high in test precision, accurate in test result and small in error when multiple parallel tests are carried out, and the detection precision of the asphalt sample is effectively improved.
Drawings
FIG. 1 is a front view of a France crisp point apparatus of the present invention;
FIG. 2 is a schematic diagram of a strain control device in a France embrittlement point gauge of the present invention.
Wherein, the attached drawings illustrate that 1-temperature regulation digital display device; 2-a water bath heating device; 3-cooling liquid cooling device; 4-heating the pipeline; 5-coolant line; 6-a strain controller; 7-rubber fixing blocks; 8-temperature one-to-one shell sensing line; 9-fixing the tube; 10-a displacement rod; 11-test glass test tubes; 12-a glass base; 13-heating the glass test tube in a water bath; 14-liquid cooling glass test tube; 15-positioning the steel sheet; 16-temperature one-shellfish receiver; 17-thin steel sheet.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the specification, but the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and the scope of the present invention is not limited thereto.
In order to solve the technical problems in the background art, the invention provides a Frass crisp point instrument, which comprises a temperature control device, a strain control device, a sound control testing device and a container base device, as shown in figure 1;
container base device is including test glass test tube 11, and glass base 12, water-bath heating glass test tube 13 and coolant liquid glass test tube 14, glass base 12 is the pipe form, the bottom is sealed, the top is equipped with the opening, the cover is established outside test glass base 11 to coolant liquid glass test tube 14 cover, water-bath heating glass test tube 13 covers is established outside coolant liquid glass test tube 14, and place glass base 12 according to the preface, each test tube mouth passes through the fixed block and the fixed complete set tubular construction of glass base opening, through pouring into hot water toward water-bath heating glass test tube 13 and add the temperature of coolant liquid control test glass test tube toward coolant liquid glass test tube. In this embodiment, all the fixing blocks are fixed by the rubber fixing blocks 7.
Strain control device includes strain controller 6, fixed pipe 9 and displacement pole 10, fixed pipe 9 is placed in test glass pipe 11, and its outer pipe wall is fixed in test glass test tube 11's mouth of pipe department through rubber fixed block 7, and fixed pipe 9 top center is equipped with the screw hole, and screw hole fixed connection is passed in strain controller 6 bottom to displacement pole 10 one end, and the other end is equipped with the couple, be connected to in the acoustic control testing arrangement through the couple, and strain controller 6 lower part be equipped with fixed pipe 9's screw hole assorted screw thread, through rotatory strain controller, can make the displacement pole at the uniform velocity removal in fixed pipe.
Wherein, for the convenience of operating personnel exert force when turning round out fixed pipe 9 with strain controller 6, set up a plurality of vertical stripes on strain controller 6's outer wall, increase the frictional force of contact position to make things convenient for operating personnel to test.
The sound control testing device comprises a temperature one-decibel sensing line 8, a temperature one-decibel receiver 16, a positioning steel sheet 15 and a thin steel sheet 17 which is fully coated with an asphalt sample, wherein the outer side of the thin steel sheet 17 is fixedly connected to the bottom end of a fixed pipe 9, an upward convex circular ring is arranged at the central position of one surface facing to the mouth of a test tube, as shown in figure 2, the circular ring is connected with a hook at the bottom end of a displacement rod 10, the positioning steel sheet 15 is fixedly connected in the fixed pipe, the outer circumference of the positioning steel sheet is welded with the inner wall of the fixed pipe into a whole at a certain position above the thin steel sheet, and a through hole allowing the displacement rod to; the temperature one-decibel receiver 16 is placed at the bottom of the test glass test tube 11, one end of the temperature one-decibel sensing line 8 is connected to the temperature one-decibel receiver 16, and the other end of the temperature one-decibel sensing line extends out of the test glass test tube 11 and is connected to the temperature control device.
The temperature control device comprises a temperature regulation and control digital display device 1, a water bath heating device 2, a cooling liquid cooling device 3 and corresponding pipelines, wherein two ends of the water bath heating device 2 penetrate through two opposite sides of a rubber fixing block 7 and a water bath heating glass test tube 13 through heating pipelines 4 and are connected, and two ends of the cooling liquid cooling device 3 penetrate through two opposite sides of the rubber fixing block 7 and a cooling liquid glass test tube 14 through a cooling liquid pipeline 5 and are connected; the temperature regulation digital display device 1 is arranged on the water bath heating device 2, the temperature one-third decibel sensing line 8 is connected to the temperature regulation digital display device 1, and information received by the temperature one-third decibel receiver is transmitted to the temperature regulation digital display device 1 to be displayed.
The above components of the Frass crisp point instrument can be assembled by the following installation method:
firstly, a thin steel sheet 17 fully coated with an asphalt sample is arranged at the bottom end of a fixed pipe 9, and a strain controller 6 is rotated and moved downwards, so that a hook at the bottom of a displacement rod 10 is hooked on a ring of the thin steel sheet 17. Then put into test glass test tube 11 with fixed pipe 9, temperature one decibel receiver 16 and temperature one decibel sensing line 8, fixed pipe 9 passes through rubber fixed block 7 with test glass tube 11 and fixes, temperature one decibel receiver 16 and 8 one end overlap joints of temperature one decibel sensing line, the rubber fixed block 7 is worn out to the temperature one decibel sensing line 8 other end, put into coolant liquid glass test tube 14 and water bath heating glass test tube 13 together in proper order with fixed pipe 9 with test glass test tube 11, and with rubber fixed block 7 fixed test tube mouth respectively, form the bushing structure, put into glass base 12 with the bushing structure at last, fix into overall structure with rubber fixed block 7. Then, pass rubber fixed block 7 respectively through heating tube 4 and coolant liquid pipeline 5 with water bath heating device 2 and coolant liquid heat sink 3 and be connected to corresponding water bath heating glass test tube 13 and coolant liquid glass test tube 14, temperature regulation and control digital display device 1 installs on water bath heating device 2, and the temperature that will wear out one minute shell sensing line 8 is connected to temperature regulation and control digital display device 1 simultaneously, from this, forms complete device.
Based on the device, the testing method of the France brittle point instrument comprises the following steps:
1. preparing a thin steel sheet 17 coated with an asphalt sample according to road engineering asphalt and asphalt mixture test procedures (JTG E20-2011);
2. installing a thin steel sheet 17 coated with an asphalt sample at the bottom of a fixed pipe 9, and assembling and fixing each device;
3. starting the temperature regulation and control digital display device 1, and recording the initial temperature C of the test glass test tube 11 at the moment0；
4. Starting the cooling liquid cooling device 3, and controlling the temperature reduction rate of the interior of the test glass test tube 11 to be 1 ℃/min until the interior of the test glass test tube 11 reaches about 10 ℃ before the predicted brittle point;
5. manually rotating the strain controller 6 to control the displacement rod 10 to move upwards at a constant speed until the thin steel sheet 17 is contacted with the positioning steel sheet 15, and resetting the rotary strain controller 6;
6. the temperature-decibel receiver 16 monitors the temperature of the asphalt sample in the stretch bending deformation process of the thin steel sheet 17 and the decibel peak value generated in the brittle fracture process, and the corresponding temperature when the decibel peak value occurs is the brittle point C of the sample1If the peak value does not appear, repeating the step 5, and if the peak value appears, recording the temperature, displaying the temperature by the temperature control digital display device 1, and taking the temperature as the brittle point C of the sample1。
7. Three groups of parallel tests are carried out on the same sample, the water bath heating device 2 is started to adjust the internal temperature of the test glass test tube 11 to the initial temperature C0Repeating the steps to determine the brittle point value of the sample;
8. taking the mean value C of each parallel test resultaThe brittle point C of the asphalt sample was determined.
Through the device and the test scheme, the invention can produce the following technical effects:
on one hand, the invention adopts a strain control device and a sound control testing device, and provides a force of uniform motion for the thin steel sheet 17 through the spiral structure of the strain controller 6 and the fixed pipe 9, so as to drive the thin steel sheet 17 to be bent and deformed at uniform speed, thereby enabling the asphalt sample on the thin steel sheet to be bent and compressed uniformly, being beneficial to controlling the bending path of the asphalt sample and reducing the test error caused by uneven stress of a parallel test; on the other hand, the water bath heating device 2 and the cooling liquid cooling device 3 are additionally arranged, the internal temperature of the test glass test tube 11 is controlled through the water bath heating device 2 and the cooling liquid cooling device 3, the initial temperature of each parallel test is guaranteed to be consistent, the test error is reduced, and the test accuracy is improved.
The above description is only a partial example of the present invention, and does not limit the embodiments and the protection scope of the present invention, therefore, it should be recognized that the present invention is covered by the protection scope of the present invention by the equivalent substitution and obvious change made by the description of the present invention for those skilled in the art.
Claims (10)
1. A Frass crisp point instrument is characterized by comprising a strain control device, a sound control testing device and a container base device; the container base device comprises a test glass test tube and a glass base, the glass base is in a round tube shape, the top of the glass base is provided with an opening, the test glass test tube is placed in the glass base, and a test tube port is fixedly connected with the opening of the glass base through a fixing block; the strain control device comprises a strain controller, a fixed tube and a displacement rod, wherein the fixed tube is hollow and sealed at the top, a tube body of the fixed tube is arranged in a test glass test tube and is fixedly connected with the test glass test tube through a fixed block, the lower end of the strain controller is movably connected with the top of the fixed tube, one end of the displacement rod penetrates through the top wall of the fixed tube and is fixedly connected with the bottom of the strain controller, and the other end of the displacement rod is connected to the sound control test device; acoustic control testing arrangement includes steel sheet, a temperature decibel receiver and a temperature decibel sensing line, steel sheet fixed connection is in fixed bobbin base, and its one end swing joint who keeps away from strain controller towards test tube mouth one side and displacement rod, test glass test tube bottom is arranged in to a temperature decibel receiver, a temperature decibel sensing line one end is connected with a temperature decibel receiver, and the other end stretches out test glass test tube, with on the data transfer external equipment that a temperature decibel receiver received.
2. The Frass crisp point instrument of claim 1, wherein the container base unit further comprises a water-bath heating glass test tube and a cooling liquid glass test tube, the cooling liquid glass test tube is sleeved outside the test glass test tube, the water-bath heating glass test tube is sleeved outside the cooling liquid glass test tube, and each test tube opening is fixed to the glass base through a fixing block.
3. The France crisp point instrument of claim 2, further comprising a temperature control device, wherein the temperature control device comprises a water bath heating device, a cooling liquid cooling device and a pipeline; the water bath heating device both ends are passed the fixed block through the pipeline and are connected with the relative both sides of water bath heating glass test tube, coolant liquid heat sink both ends are passed the fixed block through the pipeline and are connected with the relative both sides of coolant liquid glass test tube.
4. The France crisp point instrument according to claim 3, wherein the temperature control device further comprises a temperature control digital display device, the temperature control digital display device is installed on the water bath heating device, and the other end of the temperature one-decibel sensing line is connected to the temperature control digital display device.
5. The France crisp point instrument of claim 1, wherein the top of the fixed tube is provided with a threaded hole, and the lower end of the strain controller is provided with a thread matched with the threaded hole and is in threaded connection with the fixed tube.
6. The France crisp point instrument according to claim 1, wherein a hook is arranged at one end of the displacement rod, which is far away from the strain controller, a circular ring protruding towards the test tube opening is arranged at the center of one surface of the thin steel sheet, which faces the test tube opening, and the displacement rod and the thin steel sheet are suspended at the circular ring through the hook and are movably connected.
7. The France crisp point instrument according to claim 1, wherein the sound control testing device further comprises a positioning steel sheet, an outer ring of the positioning steel sheet is welded with the inner wall of the fixed pipe into a whole, the positioning steel sheet is fixed above the thin steel sheet, and a through hole matched with the diameter of the displacement rod is formed in the middle of the positioning steel sheet.
8. The fraysimeter according to claim 1, wherein the strain controller has a plurality of vertical threads on the outer wall.
9. The France crisp point instrument of claim 1, wherein the fixed block is made of rubber.
10. A method of testing a fraysitter according to any of claims 1 to 9, comprising the steps of:
1) preparing a thin steel sheet coated with an asphalt sample according to road engineering asphalt and asphalt mixture test procedures (JTG E20-2011);
2) installing the thin steel sheet coated with the asphalt sample on a fixed pipe, and assembling and fixing each device;
3) starting a temperature regulation and control digital display device and recording the initial temperature C0；
4) Starting a cooling liquid cooling device, and controlling the temperature reduction rate of the interior of the test glass test tube to be 1 ℃/min until the interior of the test glass test tube reaches about 10 ℃ before the predicted brittle point;
5) rotating the strain controller to control the displacement rod to move upwards at a constant speed until the thin steel sheet is contacted with the positioning steel sheet, and resetting the rotary strain controller;
6) monitoring the temperature of an asphalt sample and a decibel peak value generated during brittle failure in the process of the thin steel sheet undergoing stretch bending deformation through a sound control testing device, wherein the corresponding temperature when the decibel peak value occurs is a sample brittle point C1；
7) Three groups of parallel tests are carried out on the same sample, and a water bath heating device is started to adjust the internal temperature of the test glass test tube to the initial temperature C0Repeating the steps to determine the brittle point value of the sample;
8) taking the mean value C of each parallel test resultaThe brittle point C of the asphalt sample was determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200130.XA CN112798639B (en) | 2021-02-23 | 2021-02-23 | Fllas brittle point instrument and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200130.XA CN112798639B (en) | 2021-02-23 | 2021-02-23 | Fllas brittle point instrument and test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112798639A true CN112798639A (en) | 2021-05-14 |
| CN112798639B CN112798639B (en) | 2024-07-05 |
Family
ID=75815391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110200130.XA Active CN112798639B (en) | 2021-02-23 | 2021-02-23 | Fllas brittle point instrument and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112798639B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719223A (en) * | 2005-07-27 | 2006-01-11 | 马骉 | Low temperature fracture testing instrument of asphalt mixed material |
| CN101251458A (en) * | 2008-04-10 | 2008-08-27 | 中国海洋石油总公司 | Method and private facilities for measuring bitumen stiffness and crisp point |
| CN102507315A (en) * | 2011-10-14 | 2012-06-20 | 东南大学 | Testing device and testing method for ageing performance of asphalt mixture |
| CN105158143A (en) * | 2015-09-16 | 2015-12-16 | 中交四航工程研究院有限公司 | Tester for vertical permeability coefficient of geosynthetic materials |
| CN106802308A (en) * | 2017-03-30 | 2017-06-06 | 中国科学院理化技术研究所 | Material elasticity thermal behavior testing arrangement |
| CN110658089A (en) * | 2019-10-30 | 2020-01-07 | 无锡市石油仪器设备有限公司 | Full-automatic crisp point appearance |
| CN211668890U (en) * | 2019-10-21 | 2020-10-13 | 广西交通科学研究院有限公司 | Rapid sample preparation device for Frass brittle point test of asphalt |
| CN212111224U (en) * | 2020-04-29 | 2020-12-08 | 中国石油化工股份有限公司 | Continuous tester for drop melting point |
| CN214668731U (en) * | 2021-02-23 | 2021-11-09 | 广州港湾工程质量检测有限公司 | Frass crisp point appearance |
-
2021
- 2021-02-23 CN CN202110200130.XA patent/CN112798639B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719223A (en) * | 2005-07-27 | 2006-01-11 | 马骉 | Low temperature fracture testing instrument of asphalt mixed material |
| CN101251458A (en) * | 2008-04-10 | 2008-08-27 | 中国海洋石油总公司 | Method and private facilities for measuring bitumen stiffness and crisp point |
| CN102507315A (en) * | 2011-10-14 | 2012-06-20 | 东南大学 | Testing device and testing method for ageing performance of asphalt mixture |
| CN105158143A (en) * | 2015-09-16 | 2015-12-16 | 中交四航工程研究院有限公司 | Tester for vertical permeability coefficient of geosynthetic materials |
| CN106802308A (en) * | 2017-03-30 | 2017-06-06 | 中国科学院理化技术研究所 | Material elasticity thermal behavior testing arrangement |
| CN211668890U (en) * | 2019-10-21 | 2020-10-13 | 广西交通科学研究院有限公司 | Rapid sample preparation device for Frass brittle point test of asphalt |
| CN110658089A (en) * | 2019-10-30 | 2020-01-07 | 无锡市石油仪器设备有限公司 | Full-automatic crisp point appearance |
| CN212111224U (en) * | 2020-04-29 | 2020-12-08 | 中国石油化工股份有限公司 | Continuous tester for drop melting point |
| CN214668731U (en) * | 2021-02-23 | 2021-11-09 | 广州港湾工程质量检测有限公司 | Frass crisp point appearance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112798639B (en) | 2024-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214668731U (en) | Frass crisp point appearance | |
| CN109387349B (en) | Irregular antenna window surface heat flux density and pressure measuring device | |
| CN112798639A (en) | Frass brittle point instrument and test method thereof | |
| CN204128922U (en) | A kind of Measurement of liquid surface tension coefficient instrument | |
| WO2020057212A1 (en) | Concrete ultra-high pumping simulation verification apparatus and method | |
| US4061036A (en) | Device for the extraction of gaseous samples and for thermal measurement above the burden of a shaft furnace | |
| CN207036028U (en) | Fiber-optic twist degree measurement apparatus | |
| CN219810480U (en) | Indicating instrument pointer range device | |
| CN113514663A (en) | Wind speed and direction measuring device for directing incoming flow | |
| CN107238342A (en) | Fiber-optic twist degree measurement apparatus and its measuring method | |
| CN206787976U (en) | A kind of roll-down type viscosity self-operated measuring unit | |
| CN111141614A (en) | Automatic tensile testing machine and method | |
| CN217738184U (en) | Instant elongation measurer for creep endurance test | |
| CN205826691U (en) | A kind of device measuring unimodal current flow velocity | |
| CN107490620A (en) | Ni-based pored component inwall detection method and device | |
| CN210037180U (en) | Rubber tube detection device | |
| CN206683791U (en) | End temperature measuring equipment | |
| CN208984565U (en) | A kind of experimental rig for testing soil body differential frost heave coefficient | |
| CN206496984U (en) | A kind of new testing equipment resistant to bending | |
| CN207161037U (en) | A kind of decentralized wellhead of measurable tubing spinning angle | |
| CN113180632B (en) | Intracranial pressure detection equipment for patient with cerebroma | |
| CN105628434A (en) | Different water depth sampling device | |
| CN216484551U (en) | Nondestructive testing device for quality of pressure pipeline interface | |
| CN109521217A (en) | Pitot tube and anemobiagraph probe fixing device | |
| CN214621327U (en) | Digital thermocouple airflow sensor fixing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |