CN107314929A - DMA asphalt material specimen molding devices and application method - Google Patents
DMA asphalt material specimen molding devices and application method Download PDFInfo
- Publication number
- CN107314929A CN107314929A CN201710557467.XA CN201710557467A CN107314929A CN 107314929 A CN107314929 A CN 107314929A CN 201710557467 A CN201710557467 A CN 201710557467A CN 107314929 A CN107314929 A CN 107314929A
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- Prior art keywords
- blend stop
- dma
- asphalt
- groove
- convex block
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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
- G01N1/36—Embedding or analogous mounting of samples
-
- 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
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- 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)
- Road Paving Machines (AREA)
Abstract
DMA asphalt material specimen molding devices, it is to be fixed on by standing screw general, rearward recess blend stop on bottom plate, left and right convex block is inserted in the groove of forward and backward groove blend stop, and biconvex block is inserted in the groove in the middle part of forward and backward groove blend stop, forms the shaped device of several individual cavities.Its application method is：Modified pitch is prepared, froth breaking is incubated, fluidised form is heated to, injection moulding device is cooled and shaped, and is separated forward and backward groove blend stop, is removed left and right convex block and biconvex block, takes out test specimen refrigeration standby.The present invention is conducive to the control of specimen molding size, can save material, environmental protection by dismounting, cleaning, assembled repeated multiple times use；More than three test specimens can be molded simultaneously, shaping efficiency is improved, and are reduced the discreteness between the caused parallel test specimen of repeatedly shaping, are reduced influence of the factors such as environmental change to experimental result.
Description
Technical field
The present invention relates to a kind of road engineering material specimen molding device and application method, and in particular to a kind of DMA pitches
Material test specimen shaped device and application method, belong to road engineering material experimental test field.
Background technology
Asphalt material is typical viscous-elastic material, and its mechanical property is with the change of the influence factors such as stress, temperature, time
Change and change, asphalt mastic belongs to the blend of pitch and miberal powder, the modulus of miberal powder is much larger than the modulus of pitch.
Dynamic mechanical analyzer（Dynamic Mechanical Analysis abbreviations DMA）, it is viscoplasticity macromolecule material
Expect the important means of performance test, be to study viscoelastic material periodically as the term suggests being a kind of dynamic mechanical method instrument
The stress of change（Or strain）Mechanical behavior under effect, is the important means for studying pitch viscoelastic property.It can be obtained by DMA
The Dynamic Viscoelastic performance of pitch in different stress, strain, time, temperature and frequency range, therefore can be comprehensive using DMA
Evaluate the viscoelastic property of pitch.DMA according to the difference of load mode, can be divided into stress scans, strain sweep, time sweep,
Temperature scanning and frequency scanning etc., by different scan tests, can obtain various viscoelastic parameters with temperature, frequency, when
Between change curve, so as in broader temperature and frequency range study pitch viscoelastic property.
Dynamic mechanical test shows the advantage not available for many static methods with it to the sensitiveness of molecular motion, high
Molecular material is typical viscoelastic material, and only dynamic mechanical analysis could provide the elastic performance and viscosity of material simultaneously
Can, and measurement result is closer actual.Dynamic mechanical analysis generally only needs seldom sample can be in wider frequency or temperature
It is measured in the range of degree, thus the frequency spectrum and TEMPERATURE SPECTROSCOPY of material dynamic mechanical performance can be obtained in the short period of time, and
DMA is due to being measured under the conditions of small strain, and its process will not be impacted or destroyed to this body structure of material.
Asphalt test analysis is carried out currently with DMA, asphalt material shaping generally uses hot shears cutting method, by the pitch of shaping
Girder is cut into the test specimen that suitable DMA tests size with hot scraper, and the method has that size Control is inaccurate, hot scraper is to pitch material
The problems such as expecting crimp, can not be molded in batches, these problems directly affect the requirement of experiment precision and are unfavorable for experiment
Efficient progress.
The content of the invention
The defect present in shaping is tested for current DMA asphalt materials, it is an object of the invention to disclose a kind of structure
Stable, simple to operate, easy to use DMA asphalt material specimen molding devices and application method.
The technical scheme of DMA asphalt materials specimen molding device of the present invention is：
In bottom base plate provided with four bottom plate screws, forward recess blend stop is opposite with rearward recess blend stop groove, will by standing screw
It is fastened on bottom plate, and left convex block outwards inserts forward recess blend stop and rearward recess blend stop two respectively with right convex block boss
In the groove on side, two to four biconvex blocks insert forward recess blend stop with the groove in the middle part of rearward recess blend stop, forming tool respectively
There is the shaped device of three to five individual cavities.
The application method of DMA asphalt materials specimen molding device of the present invention is as follows：
A. material prepares：It can be needed to prepare its one or more of modified component according to experiment and different being modified of mixing ratio is dripped
Green grass or young crops, the modified pitch prepared is put into baking oven and is incubated froth breaking, and the modified pitch after the completion of froth breaking is inserted into heating stove heat
To fluidised form, 120-180 DEG C of furnace temp avoids ageing of asphalt；
B. test specimen is poured into a mould：Talcum powder-glycerol mixture is uniformly smeared in DMA asphalt material specimen molding device inwalls；Will stream
From a left side, the right side is slowly poured into the individual cavities of shaped device the modified pitch of state, and modified pitch should be slightly above shaped device table
Face；The shaped device for being poured into modified pitch is cooled down 1 hour at normal temperatures；Struck off and be higher by into the scraper uniform speed slow of heating
The modified asphalt material of type apparatus surface part；
C. stripping forming：Shaped device after the completion of striking off is positioned over 10-15 minutes in 2 DEG C of cold water and is cooled and shaped；After cooling
Standing screw is unloaded in cold water, separation forward recess blend stop and rearward recess blend stop remove left convex block, right convex block and biconvex
Block, taking-up test specimen refrigeration is standby, prevents test specimen temperature distortion.
The device that the present invention is provided is compared to current specimen molding device major advantage, has unified design standard size,
Be conducive to the control of specimen molding size；Device material selection stainless steel, facilitates the high-temperature molding of asphalt material to use, and can
By dismounting, cleaning, assembled and repeated multiple times use, material, environmental protection are saved；Cast when, at least can simultaneously into
More than three test specimens of type, substantially increase shaping efficiency, reduce the discreteness between the caused parallel test specimen of repeatedly shaping.It is full
Foot multiple types test specimen is once completed, needs used at the same time, using flexible, reduces the factors such as environmental change to experimental result
Influence.
Brief description of the drawings
Accompanying drawing 1 is asphalt material specimen molding device dimensional structure diagram of the present invention.
Accompanying drawing 2 is asphalt material specimen molding device perspective exploded view of the present invention.
Reference is as follows：Bottom plate 1, bottom plate screw 2, forward recess blend stop 3a, rearward recess blend stop 3b, left convex block 4a are right
Convex block 4b, biconvex block 5, standing screw 6.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated with：
In the bottom of bottom plate 1 provided with four bottom plate screws 2, forward recess blend stop 3a is opposite with rearward recess blend stop 3b grooves, passes through fixation
Screw rod 6, which is connected, to be fixed on bottom plate 1, and left convex block 4a outwards inserts forward recess blend stop 3a respectively with right convex block 4b boss
In the groove on rearward recess blend stop 3b both sides, two biconvex blocks 5 are inserted in forward recess blend stop 3a and rearward recess blend stop 3b respectively
In the groove in portion, the shaped device with three individual cavities is formed.
DMA asphalt material specimen molding devices can be made of stainless steel material.
DMA asphalt materials specimen molding device of the present invention is applied to all pitches and asphalt mastic, its test specimen full-size
For 35mm*10mm*6mm.
The application method of DMA asphalt materials specimen molding device of the present invention is as follows：
A. material prepares：Rubber powder is added into matrix pitch by asphalt quality replacement fraction 20% and prepares rubber powder modified asphalt, will be prepared
Good modified pitch, which is put into baking oven, is incubated froth breaking, and the modified pitch after the completion of froth breaking is inserted into heating furnace is heated to fluidised form, plus
Hot 160-180 DEG C of temperature avoids ageing of asphalt；
B. test specimen is poured into a mould：Talcum powder-glycerol mixture is uniformly smeared in DMA asphalt material specimen molding device inwalls；Will stream
From a left side, the right side is slowly poured into three individual cavities of shaped device the modified pitch of state, and modified pitch should be slightly above shaping dress
Put surface；The shaped device for being poured into modified pitch is cooled down 1 hour at normal temperatures；Height is struck off with the scraper uniform speed slow of heating
Go out the modified asphalt material of shaped device surface portion；
C. stripping forming：Shaped device after the completion of striking off is positioned over 10-15 minutes in 2 DEG C of cold water and is cooled and shaped；After cooling
Standing screw is unloaded in cold water, separation forward recess blend stop and rearward recess blend stop remove left convex block, right convex block and biconvex
Block, taking-up test specimen refrigeration is standby, prevents test specimen temperature distortion.
Claims (3)
1.DMA asphalt material specimen molding devices, it is characterised in that：In bottom plate（1）Bottom is provided with four bottom plate screws（2）, it is preceding
Groove blend stop（3a）With rearward recess blend stop（3b）Groove is opposite, passes through standing screw（6）Connect and be fixed on bottom plate（1）On,
Left convex block（4a）With right convex block（4b）Boss outwards inserts forward recess blend stop respectively（3a）With rearward recess blend stop（3b）Both sides
Groove in, two to four biconvex blocks（5）Forward recess blend stop is inserted respectively（3a）With rearward recess blend stop（3b）The groove at middle part
It is interior, form the shaped device with three to five individual cavities；
It is further characterized in that：The application method of DMA asphalt material specimen molding devices is as follows：
A. material prepares：It can be needed to prepare its one or more of modified component according to experiment and different being modified of mixing ratio is dripped
Green grass or young crops, the modified pitch prepared is put into baking oven and is incubated froth breaking, and the modified pitch after the completion of froth breaking is inserted into heating stove heat
To fluidised form, 120-180 DEG C of furnace temp avoids ageing of asphalt；
B. test specimen is poured into a mould：Talcum powder-glycerol mixture is uniformly smeared in DMA asphalt material specimen molding device inwalls；Will stream
From a left side, the right side is slowly poured into the individual cavities of shaped device the modified pitch of state, and modified pitch should be slightly above shaped device table
Face；The shaped device for being poured into modified pitch is cooled down 1 hour at normal temperatures；Struck off and be higher by into the scraper uniform speed slow of heating
The modified asphalt material of type apparatus surface part；
C. stripping forming：Shaped device after the completion of striking off is positioned over 10-15 minutes in 2 DEG C of cold water and is cooled and shaped；After cooling
Standing screw is unloaded in cold water, separation forward recess blend stop and rearward recess blend stop remove left convex block, right convex block and biconvex
Block, taking-up test specimen refrigeration is standby, prevents test specimen temperature distortion.
2. DMA asphalt materials specimen molding device according to claim 1, it is characterised in that：In bottom plate（1）Bottom is provided with
Four bottom plate screws（2）, forward recess blend stop（3a）With rearward recess blend stop（3b）Groove is opposite, passes through standing screw（6）Connected
Connect and be fixed on bottom plate（1）On, left convex block（4a）With right convex block（4b）Boss outwards inserts forward recess blend stop respectively（3a）With
Rearward recess blend stop（3b）In the groove on both sides, two biconvex blocks（5）Forward recess blend stop is inserted respectively（3a）With rearward recess blend stop
（3b）In the groove at middle part, the shaped device with three individual cavities is formed；
It is further characterized in that：The application method of DMA asphalt material specimen molding devices is as follows：
A. material prepares：Rubber powder is added into matrix pitch by asphalt quality replacement fraction 20% and prepares rubber powder modified asphalt, will be prepared
Good modified pitch, which is put into baking oven, is incubated froth breaking, and the modified pitch after the completion of froth breaking is inserted into heating furnace is heated to fluidised form, plus
Hot 160-180 DEG C of stove heat temperature avoids ageing of asphalt；
B. test specimen is poured into a mould：Talcum powder-glycerol mixture is uniformly smeared in DMA asphalt material specimen molding device inwalls；Will stream
From a left side, the right side is slowly poured into three individual cavities of shaped device the modified pitch of state.
3. DMA asphalt materials specimen molding device according to claim 1, it is characterised in that：DMA asphalt materials test specimen into
Type device can be made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557467.XA CN107314929A (en) | 2017-07-10 | 2017-07-10 | DMA asphalt material specimen molding devices and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557467.XA CN107314929A (en) | 2017-07-10 | 2017-07-10 | DMA asphalt material specimen molding devices and application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107314929A true CN107314929A (en) | 2017-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710557467.XA Pending CN107314929A (en) | 2017-07-10 | 2017-07-10 | DMA asphalt material specimen molding devices and application method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823657A (en) * | 2019-11-19 | 2020-02-21 | 长沙理工大学 | Molding device for DMA (direct memory Access) asphalt mortar test piece and using method |
| CN113138108A (en) * | 2021-04-22 | 2021-07-20 | 山东京博石油化工有限公司 | Mold and method for detecting low-temperature flexibility of waterproof asphalt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487307A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Forming mold for asphalt test pieces of bent beam rheometer |
-
2017
- 2017-07-10 CN CN201710557467.XA patent/CN107314929A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487307A (en) * | 2013-10-17 | 2014-01-01 | 东南大学 | Forming mold for asphalt test pieces of bent beam rheometer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823657A (en) * | 2019-11-19 | 2020-02-21 | 长沙理工大学 | Molding device for DMA (direct memory Access) asphalt mortar test piece and using method |
| CN113138108A (en) * | 2021-04-22 | 2021-07-20 | 山东京博石油化工有限公司 | Mold and method for detecting low-temperature flexibility of waterproof asphalt |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171103 |
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| RJ01 | Rejection of invention patent application after publication |