CN110196318A - A method of detection cement-emulsified asphalt and Bituminous concrete surface degrees of fusion - Google Patents
A method of detection cement-emulsified asphalt and Bituminous concrete surface degrees of fusion Download PDFInfo
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- CN110196318A CN110196318A CN201910475498.XA CN201910475498A CN110196318A CN 110196318 A CN110196318 A CN 110196318A CN 201910475498 A CN201910475498 A CN 201910475498A CN 110196318 A CN110196318 A CN 110196318A
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- 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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention is based on the time sweep modes in dynamic rheometer, by not merging test specimen and cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen complex shear modulus to cement-emulsified asphalt/Bituminous concrete surface bilayer, calculate Cold Recycled Mixture with Emulsified Asphalt cement-emulsified asphalt and Bituminous concrete surface degrees of fusion, optimize Cold Recycled Mixture with Emulsified Asphalt construction technology and mix-design with this, scientific basis is provided for the cold-regenerated road surface optimization of material design based on interfacial effect, to lay the foundation to improve the performance of cold-regenerated road surface with applicability.
Description
Technical field
The present invention relates to road engineering bituminous pavement recycle utilization technology fields, in particular, being related to a kind of detection cement
The method of emulsified asphalt and Bituminous concrete surface degrees of fusion.
Background technique
Currently, waste asphalt mixture (the reclaimed asphalt that bituminous pavement annual medium-capital overhauling maintenance in China's generates
Pavement, RAP) about more than 200,000,000 tons, it is the first in the world.The highly efficient regeneration for how realizing RAP, it is effective for environmental protection, resource
Using, realize road surface sustainable development have important practical significance.At present China to the utilization rate of RAP less than 30%, and
The utilization rate of developed country is but up to 90% or more.For reclaimed asphalt mixture, new cementitious material and the surface RAP Bituminous concrete surface
Fusion degree is one of the main focus of Recycling Old Asphalt Mixture application, this is directly related to reclaimed bituminous pavement
Overall performance and its service life.For heat regeneration asphalt mixture, has related detecting method, but hot in-place recycling is to waste and old
The utilization rate of asphalt is relatively low, and construction temperature is higher, can generally reach 170~190 DEG C, can generate a large amount of two
The pernicious gases such as carbonoxide, glance coal, are unfavorable for environmental protection.
Cold Recycled Mixture with Emulsified Asphalt is compound by a kind of multiphase that the different materials such as emulsified asphalt, cement, RAP form
Material the scale of construction can consume RAP greatly, and room temperature is constructed, economy, obvious environment benefit.As a kind of heterogeneous composite material, cement,
The interface that compound rubber cement and the surface RAP Bituminous concrete surface when two kinds of cementitious materials of emulsified asphalt coexist are formed is even more that its is particularly important
Can micro-structure, interface effectively transmit load, the fusion degree dependent on cement-emulsified asphalt and Bituminous concrete surface.For cold renewal
Material of this performance of mixture between flexible and rigidity, Strengthening and Toughening are its complex targets, and interface is then to realize Strengthening and Toughening
Important medium, but enough attention are not caused for the degrees of fusion of rubber cement and Bituminous concrete surface, so that this technology has " card neck
Son " technical bottleneck, such as performance is low, universality is poor, open to traffic is slow.
Firstly, waste asphalt mixture is generally regarded as " black gathers materials ", is ignored when carrying out cold regeneration mix design
The influence of surface Bituminous concrete surface.In fact, causing the cement-emulsified asphalt/interface RAP area knot due to the presence of the surface RAP Bituminous concrete surface
Structure and performance and cement-emulsified asphalt/gathering materials has differences, interface plot structure is difficult to accurately grasp with performance, this also just determines cold
The performance of regenerating mixture is difficult to accurately control and predict.
Secondly as cold regeneration mix mixes and stirs for room temperature, RAP is not heated, consolidates on cement-emulsified asphalt rubber cement and RAP
State Bituminous concrete surface cannot achieve the new and old pitch of flowable state in similar hot recycling and be based on compatible thermodynamic (al) fusion.In regenerative process, by
In mixing time is shorter and Bituminous concrete surface is in hard crisp state, the surface RAP Bituminous concrete surface will not melt completely with cement-emulsified asphalt
It closes, so as to cause cement-emulsified asphalt/Bituminous concrete surface interface weak intercalated layer easy to form.Under the action of load, cold renewal drip
Weak intercalated layer in green mixture will will form micro-cracks, reduce the pavement performance of reclaimed asphalt mixture.
In addition, cement-emulsified asphalt rubber cement is as a kind of porous structure material, anti-water percolating capacity is poor, hydrone
Easily enter rubber cement and the adhesion layer of RAP from hole with H+, rubber cement is caused easily to peel off, interface is caused to become the thin of cold regeneration mix
Weak position.Thus, often become the origin of microscopic damage, microscopic damage and destruction connection, perforation from interface are finally led
Cause the macroscopic failure of mixture.
X-ray scanning electron microscope, gel chromatography analytic approach, FTIR spectrum and transmission electricity in the prior art
These test methods such as sub- microscope should have good spatial resolution, can be adopted between test polymer-polymer
Fusion degree, but these test method difficulty are larger, and expensive equipment.It is done in addition, generally requiring heavy element when test degrees of fusion
Label, these tracer molecules may slow down mass transfer process and influence fusion process.
Summary of the invention
Rheology has proved that it all may be used to many problems in polymer science by countless tests as a basic subject
To carry out convenient and effective research.Theoretically, the basic premise of rheological method research physical chemistry of high polymers problem is
Any physicochemical change for causing system viscoelasticity to change can all generate response in rheological parameters.And it is cement-emulsified
Asphalt mastic and Bituminous concrete surface belong to viscous-elastic material, and the variation at two-layer hybrid interface will necessarily cause rheology to be joined
Several variations.
Therefore, in order to avoid the deficiencies in the prior art, the present invention proposes a kind of detection based on dynamic rheology
The method of cement-emulsified asphalt and Bituminous concrete surface degrees of fusion.
Solution for solving technical problems
To achieve the above object, the present invention adopts the following technical scheme:
A method of detection cement-emulsified asphalt and Bituminous concrete surface degrees of fusion include the following steps:
(1) prepare Bituminous concrete surface and cement-emulsified asphalt；
(2) Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen and cement-emulsified asphalt/Bituminous concrete surface bilayer fusion are prepared respectively
Test specimen；
(3) Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen are superimposed, prepare cement-emulsified asphalt/Bituminous concrete surface bilayer and does not melt
Close test specimen；
(4) dynamic shear rheometer is utilized, cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen and laitance are calculated separately
Change the multiple and modulus of shearing that pitch/Bituminous concrete surface bilayer does not merge test specimen；
(5) degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface is detected according to the following formula:
In formula, D is degrees of fusion (%),It compound is cut for i-th of cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen
Shear modulu (MPa),I-th of complex shear modulus (MPa) of test specimen is not merged for cement-emulsified asphalt/Bituminous concrete surface bilayer；n
For test data total number.
Preferably, the step (1) includes:
(1.1) preparation of Bituminous concrete surface
The waste asphalt mixture of selected test, according to " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG
E20-2011 " from the method (Abson method) of asphalt recycling pitch " (T0726-2011) in), recycles waste asphalt
Bituminous concrete surface in mixture；
(1.2) preparation of cement-emulsified asphalt
Cement is added in emulsified asphalt and stirs evenly, prepares cement-emulsified asphalt.
Preferably, the step (2) includes:
(2.1) Bituminous concrete surface test specimen is prepared
The Bituminous concrete surface of heating is instilled into pre-prepd test specimen ring, is then placed in constant temperature oven, is heated and melts to Bituminous concrete surface
It takes out, is put into drying basin cooling after changing levelling；
(2.2) cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen is prepared
Cement-emulsified asphalt is instilled on Bituminous concrete surface test specimen, forms film in homogeneous thickness；
(2.3) cement-emulsified asphalt test specimen is prepared
Cement-emulsified asphalt is instilled in test specimen ring, and forms film in homogeneous thickness.
Preferably, the step (2) further include:
Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen and cement-emulsified asphalt/Bituminous concrete surface bilayer fusion examination to preparation
The health of part and cooling step.
Preferably, the step (3) includes:
By Bituminous concrete surface test specimen and cement-emulsified asphalt test specimen with Bituminous concrete surface test specimen under, cement-emulsified asphalt test specimen is upper
Mode is superimposed, and is prepared cement-emulsified asphalt/Bituminous concrete surface bilayer and is not merged test specimen.
Preferably, the step (4) includes:
(4.1) chamber temperature that dynamic shear rheometer is arranged is 40-50 DEG C, and cement-emulsified asphalt/Bituminous concrete surface is double
Layer fusion test specimen is put into environmental chamber；
(4.2) setting test temperature is 15-25 DEG C, takes strain controlling mode, and dynamic shearing strain level is 3%, is cut
Cutting frequency is 10Hz, then carries out the heat preservation of 10-20min；
(4.3) the time sweep test that 30s is carried out after the completion of heat preservation, after test, exports test data, obtains 30s
Interior cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen complex shear modulus；
(4.4) test model is exited, setting chamber temperature is 90-110 DEG C, and it is indoor that environment is removed after temperature reaches
Test specimen.
Preferably, the step (4) further include:
Repeating said steps (4.1)-(4.3), obtain cement-emulsified asphalt/Bituminous concrete surface bilayer and do not merge the compound of test specimen cutting
Shear modulu.
Preferably, the step (4) further include:
Extract cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen respectively, cement-emulsified asphalt/Bituminous concrete surface bilayer does not merge
Multiple and modulus of shearing in test specimen 21-30s, calculates the degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface.
Preferably, in the step (2):
Test specimen ring is placed on the glass film plates for being coated with talcum powder interleaving agent, while test specimen ring inner wall is also uniformly coated with talcum
Powder interleaving agent.
Preferably, in the step (2):
The infusion volume of Bituminous concrete surface is 0.25 ± 0.01g, and the infusion volume of cement-emulsified asphalt is 0.50 ± 0.01g.
The utility model has the advantages that
, can be according to the glutinous bullet attribute of material using method of the invention, it can simply, quantitatively based on dynamic rheology
Determine the degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface.This method can provide one for road engineering designing unit and unit in charge of construction etc.
Kind method eliminates weak interface to cold regeneration mix structure to optimize the mix-design and production technology of cold regeneration mix
It solves to restrict cold regeneration mix height to promote the mechanical property and the scope of application of cold regeneration mix with the influence of performance
" seizing by the throat " technical bottleneck of effect, to promote China's waste asphalt pavement material resourcesization using level；Meanwhile the hair
Bright technology can also power-assisted China road infrastructure resource-conserving, environmentally friendly construction level indirectly, there is significant society
It can economic benefit.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention
Exemplary embodiment, and it is used to explain the present invention disclosed method.
Fig. 1 is cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen DSR test result.
Fig. 2 is the DSR test result that cement-emulsified asphalt/Bituminous concrete surface bilayer does not merge test specimen.
Specific embodiment
In order to better illustrate the present invention, numerous details is given in specific embodiment below.Ability
Field technique personnel should be appreciated that no certain details, the present invention equally can be implemented.For known to those skilled in the art
Method, means be not described in detail, in order to highlight purport of the invention.
The basic ideas of the method for detection cement-emulsified asphalt and Bituminous concrete surface degrees of fusion provided by the invention are as follows: pour respectively
Molding cement-emulsified asphalt and Bituminous concrete surface do not merge test specimen and fusion test specimen, using the test specimen scan pattern of dynamic rheometer, survey
The multiple and modulus of shearing of two kinds of test specimens under certain condition is tried with the variation of test specimen, then according to test result, calculates its and compound cut
The relative variation of shear modulu, in this, as the degrees of fusion of the two.Specifically comprise the following steps:
1, the waste asphalt mixture RAP for selecting test, according to " highway engineering pitch and Asphalt Mixture Experiment are advised
Journey " in (JTG E20-2011) " from the method (Abson method) of asphalt recycling pitch " (T0726-2011), recycle RAP
In Bituminous concrete surface, for use.
2,60-80g emulsified asphalt is added in a beaker, then adds 20-40g cement, is slowly stirred with glass bar
Uniformly, mixing time 30-90s, to obtain cement-emulsified asphalt, for use.
3,3 groups of test specimen rings are placed on the glass film plates of powder coating interleaving agent, while test specimen ring inner wall also uniformly applies
Upper talcum powder interleaving agent.Wherein it is preferred to 15.9 ± 0.1mm of internal diameter of test specimen ring, 2.8 ± 0.1mm of wall thickness, wall is high by 6.5 ±
0.1mm。
4, the Bituminous concrete surface of heating is then instilled into 0.25 ± 0.01g in test specimen ring, is then placed in 120-160 DEG C of constant temperature oven
In, after Bituminous concrete surface test specimen is heated melt levelling after, it is careful immediately to take out, be put into drying basin that cooling is spare, prepare two groups altogether.
It should be noted that test specimen needs to be horizontally arranged in an oven, inclination angle has been avoided.
5, one group of Bituminous concrete surface test specimen is then taken out, continues to instill 0.50 ± 0.01g of cement-emulsified asphalt on it, and formed
Film in homogeneous thickness obtains cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen (A test specimen).Meanwhile it is empty in last group
The test specimen ring set also instills 0.50 ± 0.01g of cement-emulsified asphalt, and forms film in homogeneous thickness, obtains cement-emulsified asphalt
Test specimen.
6, the glass film plates for being placed with 3 groups of test specimen rings is put into 30-50 DEG C of constant temperature oven, health 48-96h then takes out
Cooling 20-40min is put into drying basin.
7, test specimen is gently taken out from test specimen ring, gently by the cement-emulsified asphalt test specimen being prepared separately and Bituminous concrete surface test specimen
It is stacked together, under, cement-emulsified asphalt obtains cement-emulsified asphalt/Bituminous concrete surface bilayer and do not merge test specimen upper Bituminous concrete surface
(B test specimen).
8, dynamic shear rheometer is opened, the metal plate and loading device of diameter 8mm is selected, is then attached on instrument,
Then the zero clearance for adjusting metal plate and loading device is horizontal.
9, the chamber temperature that dynamic shear rheometer is arranged is 40-50 DEG C, and loading device is risen after temperature reaches, will
A test specimen is put on a metal plate, and setting gap level is 1-3mm；Then loading device is put down, test specimen is squeezed, after heating
Scraper is repaired along the edge of metal plate except extra test specimen with the outer diameter of plate up to flushing, and carefully cleaner assay plate surface, then
Close environmental chamber.
10, setting test temperature is 15-25 DEG C, takes strain controlling mode, and dynamic shearing strain level is 3%, shearing
Frequency is 10Hz, then carries out the heat preservation of 10-20min.
11, the time sweep test that 30s is carried out after the completion of heat preservation, after test, exports test data, obtains in 30s
The complex shear modulus of test specimen.
It should be noted that complex shear modulus therein is calculated automatically from by dynamic shear rheometer.
12, test model is exited, setting chamber temperature is 90-110 DEG C, and loading device and gold are removed after temperature reaches
Belong to the test specimen on plate.
13, referring to abovementioned steps 8-11, time sweep test equally is carried out to No. B test, test data is then exported, obtains
The complex shear modulus tested in 30s.
It should be noted that test specimen will generate fatigue rupture with the extension of test period, test result will affect.Cause
This, the complex shear modulus in the present embodiment optimization test data relatively stable preceding 30s period.
14, lead to test result in view of the data of preceding 10s may be because the shear strain horizontal instability of setting
Accuracy, therefore the multiple and modulus of shearing in A test specimen and B test specimen 21-30s is extracted respectively, its data is handled, is pressed
The degrees of fusion of cold regeneration mix cement-emulsified asphalt and Bituminous concrete surface is calculated according to following formula (1).
In formula, D is degrees of fusion (%),I-th of complex shear modulus (MPa) for the A test specimen merged,
I-th of complex shear modulus (MPa) for the B test specimen not merged；N is test data total number.
It should be noted that " data are handled " include: when some measured value in one group of measured value and average value it
When difference is greater than 1.15 times of standard deviation, which should give up, and using the average value of remaining measured value as final test knot
Fruit.
Embodiment:
1, the waste asphalt mixture RAP about 1200g for selecting test, according to " highway engineering pitch and asphalt
Testing regulations " in (JTG E20-2011) " from the method (Abson method) of asphalt recycling pitch " (T0726-2011),
The Bituminous concrete surface in RAP is recycled, for use.
2,60-80g emulsified asphalt is added in a beaker, then adds 30g cement, is slowly stirred with glass bar
It is even, mixing time 60s, to obtain cement-emulsified asphalt, for use.
3,3 groups of test specimen rings are placed on the glass film plates of powder coating interleaving agent, while test specimen ring inner wall also uniformly applies
Upper talcum powder interleaving agent.Wherein it is preferred to 15.9 ± 0.1mm of internal diameter of test specimen ring, 2.8 ± 0.1mm of wall thickness, wall is high by 6.5 ±
0.1mm。
4, the Bituminous concrete surface of heating is then instilled into 0.25 ± 0.01g in test specimen ring, is then placed in 140 DEG C of constant temperature ovens,
After Bituminous concrete surface test specimen is heated melt levelling after, it is careful immediately to take out, be put into drying basin that cooling is spare, prepare two groups altogether.
5, one group of Bituminous concrete surface test specimen is then taken out, continues to instill 0.50 ± 0.01g of cement-emulsified asphalt on it, and formed
Film in homogeneous thickness obtains cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen (A test specimen).Meanwhile it is empty in last group
The test specimen ring set also instills 0.50 ± 0.01g of cement-emulsified asphalt, and forms film in homogeneous thickness, obtains cement-emulsified asphalt
Test specimen.
6, the glass film plates for being placed with 3 groups of test specimen rings is put into 40 DEG C of constant temperature ovens, health 72h, then take out be put into it is dry
Cooling 30min in dry ware.
7, test specimen is gently taken out from test specimen ring, gently by the cement-emulsified asphalt test specimen being prepared separately and Bituminous concrete surface test specimen
It is stacked together, under, cement-emulsified asphalt obtains cement-emulsified asphalt/Bituminous concrete surface bilayer and do not merge test specimen upper Bituminous concrete surface
(B test specimen).
8, (the present embodiment uses the Lab+ type dynamic shearing stream of commercially available Malvern company to opening dynamic shear rheometer
Become instrument), the metal plate and loading device of diameter 8mm are selected, is then attached on instrument, metal plate and loading device are then adjusted
Zero clearance it is horizontal.
9, the chamber temperature that dynamic shear rheometer is arranged is 45 DEG C, loading device is risen after temperature reaches, by No. A
Test specimen is put on a metal plate, and setting gap level is 2mm；Then loading device is put down, test specimen is squeezed, with the scraper edge after heating
The edge of metal plate is repaired except extra test specimen with the outer diameter of plate up to flushing, and carefully cleaner assay plate surface, is then shut off ring
Border room.
10, setting test temperature is 120 DEG C, takes strain controlling mode, and dynamic shearing strain level is 3%, shearing frequency
Rate is 10Hz, then carries out the heat preservation of 15min.
11, the time sweep test that 30s is carried out after the completion of heat preservation, after test, exports test data, obtains in 30s
The complex shear modulus of test specimen, test result are shown in Fig. 1.
12, test model is exited, setting chamber temperature is 100 DEG C, and loading device and metal are removed after temperature reaches
Test specimen on plate.
13, referring to abovementioned steps 8-11, time sweep test equally is carried out to No. B test, test data is then exported, obtains
The complex shear modulus tested in 30s, test result are shown in Fig. 2.
14, lead to test result in view of the data of preceding 10s may be because the shear strain horizontal instability of setting
Accuracy, therefore the multiple and modulus of shearing in A test specimen and B test specimen 21-30s is extracted respectively, (1) calculating is cold again according to the following formula
The degrees of fusion of raw mix cement-emulsified asphalt and Bituminous concrete surface, calculated result are shown in Table 1, handle its data, obtain it and melt
Right is 0.29.
In formula, D is degrees of fusion (%),I-th of complex shear modulus (MPa) for the A test specimen merged,
I-th of complex shear modulus (MPa) for the B test specimen not merged；N is test data total number.
1 cement-emulsified asphalt of table and Bituminous concrete surface degrees of fusion calculated result
Verify example:
In order to verify the accuracy of aforementioned present invention the method, laitance is tested using existing " infra-red sepectrometry "
Change the degrees of fusion of pitch and Bituminous concrete surface, infrared signature absorption peak represents different functional groups, therefore does not have using pitch with cement
Some functional groups are used as tracer as label, using terminal hydroxy group nitrile rubber (CTBN), using eyeball base peak area and antisymmetry
The ratio of methyl peak area, in the relative amount of certain point, finally obtains the degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface as CTBN
Are as follows: 0.33.
Test result and the result obtained using the method for the present invention are almost the same.
Embodiments of the present invention are described above, above description is exemplary, and non-exclusive.Not inclined
In the case where scope and spirit from illustrated embodiment, many is repaired for those skilled in the art
Change and change will be apparent from.The selection of term used herein, it is intended to the method for best explaining embodiment, or
Other those of ordinary skill of the art are enable to understand the embodiment of present disclosure.
Claims (10)
1. a kind of method for detecting cement-emulsified asphalt and Bituminous concrete surface degrees of fusion, includes the following steps:
(1) prepare Bituminous concrete surface and cement-emulsified asphalt；
(2) Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen and cement-emulsified asphalt/Bituminous concrete surface bilayer fusion examination are prepared respectively
Part；
(3) Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen are superimposed, prepare cement-emulsified asphalt/Bituminous concrete surface bilayer and does not merge examination
Part；
(4) dynamic shear rheometer is utilized, cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen and cement-emulsified drip are calculated separately
Blueness/Bituminous concrete surface bilayer does not merge the multiple and modulus of shearing of test specimen；
(5) degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface is detected according to the following formula:
In formula, D is degrees of fusion (%),For i-th of complex shear modulus of cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen
(MPa),I-th of complex shear modulus (MPa) of test specimen is not merged for cement-emulsified asphalt/Bituminous concrete surface bilayer；N is test
Data total number.
2. the method according to claim 1, wherein the step (1) includes:
(1.1) preparation of Bituminous concrete surface
The waste asphalt mixture of selected test, according to " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG
E20-2011 " from the method (Abson method) of asphalt recycling pitch " (T0726-2011) in), recycles waste asphalt
Bituminous concrete surface in mixture；
(1.2) preparation of cement-emulsified asphalt
Cement is added in emulsified asphalt and stirs evenly, prepares cement-emulsified asphalt.
3. method according to claim 1 or 2, which is characterized in that the step (2) includes:
(2.1) Bituminous concrete surface test specimen is prepared
The Bituminous concrete surface of heating is instilled into pre-prepd test specimen ring, is then placed in constant temperature oven, is flowed to heated melt of Bituminous concrete surface
It takes out, is put into drying basin cooling after flat；
(2.2) cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen is prepared
Cement-emulsified asphalt is instilled on Bituminous concrete surface test specimen, forms film in homogeneous thickness；
(2.3) cement-emulsified asphalt test specimen is prepared
Cement-emulsified asphalt is instilled in test specimen ring, and forms film in homogeneous thickness.
4. according to the method described in claim 2, it is characterized in that, the step (2) further include:
To Bituminous concrete surface test specimen, cement-emulsified asphalt test specimen and cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen of preparation
Health and cooling step.
5. according to the method described in claim 4, it is characterized in that, the step (3) includes:
By Bituminous concrete surface test specimen and cement-emulsified asphalt test specimen with Bituminous concrete surface test specimen under, cement-emulsified asphalt test specimen is in upper mode
Superposition, prepares cement-emulsified asphalt/Bituminous concrete surface bilayer and does not merge test specimen.
6. the method according to claim 1, wherein the step (4) includes:
(4.1) chamber temperature that dynamic shear rheometer is arranged is 40-50 DEG C, and cement-emulsified asphalt/Bituminous concrete surface bilayer is melted
Test specimen is closed to be put into environmental chamber；
(4.2) setting test temperature is 15-25 DEG C, takes strain controlling mode, and dynamic shearing strain level is 3%, shearing frequency
Rate is 10Hz, then carries out the heat preservation of 10-20min；
(4.3) the time sweep test that 30s is carried out after the completion of heat preservation, after test, exports test data, obtains in 30s
Cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen complex shear modulus；
(4.4) test model is exited, setting chamber temperature is 90-110 DEG C, and the indoor examination of environment is removed after temperature reaches
Part.
7. according to the method described in claim 6, it is characterized in that, the step (4) further include:
Repeating said steps (4.1)-(4.3) obtain the combination shearing mould that cement-emulsified asphalt/Bituminous concrete surface bilayer does not merge test specimen
Amount.
8. the method according to the description of claim 7 is characterized in that the step (4) further include:
Extract cement-emulsified asphalt/Bituminous concrete surface bilayer fusion test specimen respectively, cement-emulsified asphalt/Bituminous concrete surface bilayer does not merge test specimen
Multiple and modulus of shearing in 21-30s, calculates the degrees of fusion of cement-emulsified asphalt and Bituminous concrete surface.
9. according to the method described in claim 3, it is characterized in that, in the step (2):
Test specimen ring is placed on the glass film plates for being coated with talcum powder interleaving agent, at the same test specimen ring inner wall be also uniformly coated with talcum powder every
From agent.
10. according to the method described in claim 3, it is characterized in that, in the step (2):
The infusion volume of Bituminous concrete surface is 0.25 ± 0.01g, and the infusion volume of cement-emulsified asphalt is 0.50 ± 0.01g.
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| CN201910475498.XA CN110196318B (en) | 2019-06-03 | 2019-06-03 | Method for detecting fusion degree of cement emulsified asphalt and old asphalt |
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| CN201910475498.XA CN110196318B (en) | 2019-06-03 | 2019-06-03 | Method for detecting fusion degree of cement emulsified asphalt and old asphalt |
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| CN113607608A (en) * | 2021-09-02 | 2021-11-05 | 交通运输部公路科学研究所 | Method for evaluating interaction capacity of cement emulsified asphalt mortar and old asphalt interface |
| CN113607608B (en) * | 2021-09-02 | 2023-05-12 | 交通运输部公路科学研究所 | Method for evaluating interfacial interaction capability of cement emulsified asphalt cement and old asphalt |
| CN113834708A (en) * | 2021-09-15 | 2021-12-24 | 南京林业大学 | Sample preparation method for emulsified asphalt and old asphalt fusion test |
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