CN106483011A - Bituminous paving each layer dynamic testing method and thread gluing device - Google Patents
Bituminous paving each layer dynamic testing method and thread gluing device Download PDFInfo
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- CN106483011A CN106483011A CN201611116175.4A CN201611116175A CN106483011A CN 106483011 A CN106483011 A CN 106483011A CN 201611116175 A CN201611116175 A CN 201611116175A CN 106483011 A CN106483011 A CN 106483011A
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- 238000002474 experimental method Methods 0.000 claims abstract description 5
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- 229910052751 metal Inorganic materials 0.000 claims description 8
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
- G01N2203/0007—Low frequencies up to 100 Hz
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Abstract
The present invention relates to a kind of each layer dynamic testing method of bituminous paving and thread gluing device, the method includes：The dynamic moduluss of layer, middle surface layer and cutting optimal above former road surface are detected.The present invention adopts simple performance experiment machine（SPT）Or can apply to offset sine wave or partly just lose waveshape load, frequency range, in 0.1 ~ 25Hz, applies maximum stress level and should reach 2800KPa, and load the loading equipemtn that resolution can reach 5N.Skew sine wave is applied to each layer core sample or is partly just losing ripple axial compression stress, measure the recoverable axial strain of test specimen, calculate the uniaxial compression dynamic moduluss in the range of the online viscoelasticity of each layer of in-service bituminous paving.Solve the rigors to core sample ruler cun for the existing dynamic moduluss testing equipment, methods described is 3cm ~ 15cm to the measured thickness range of core sample, the material parameter of existing each layer of position of bituminous paving can be calculated, and be used for evaluating present situation residing for in-service bituminous paving each floor position and predicting old road residual life.
Description
Technical field
The present invention relates to evaluating the technical field of measurement and test of old road bituminous paving and in particular to a kind of each floor of bituminous paving is dynamic
Detection method and thread gluing device.
Background technology
By the end of the year 2015, China Higher level highway construction mileage has surmounted the U.S., has leapt to the first in the world.With China
Road network increasingly perfect, along with problem also become increasingly conspicuous, highway is open to traffic the continuous growth of the time limit, and the volume of traffic persistently increases
Plus, reloading year after year add the factor such as weather, environment change so that the real work stress of bituminous paving and
There is larger difference it is impossible to be analyzed and evaluated with existing static mechanical system in material character etc..Moved by investigation
State performance test methods find, dynamic moduluss study more, Er Duijiu road asphalt road as the important parameter of Pavement Structure Design
Face carries out the research of material dynamic performance, and determine material dynamic parameter research less, and do not have the corresponding detection method can
To utilize.
In order that the As-Is analysis parameter of China's bituminous paving more can reflect practical working situation and the road of pavement structure
Face property development matches it is necessary to systematically study to in-service asphalt pavement material dynamic property.Bituminous paving is because of it
Special layered system structure, leads to the impact difference that the factors such as the environment suffered by each layer, the hydrology cause, adds stress shape
Condition, material property are different, so the mechanical structure present situation of layered queuing networks old road bituminous paving, be the long-term road maintenance programming in road surface and
Structure preserves offer technical support for a long time and is particularly important.
At present, it is merely capable of the asphalt road to more than 15cm thickness due to the restriction of simple performance experiment instrument (SPT) product
Face is detected, but the bituminous paving of existing highway if three-decker to be divided into, less than 15cm, this will result in drip
The blue or green south of road cannot be carried out being layered, and each layer is accurately detected respectively.
In view of above-mentioned defect, the design people's actively in addition research and innovation, move to founding a kind of each layer of bituminous paving
State detection method and loop fastener structures are so as to more the value in industry.
Content of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide one kind can accurately, easily survey old road Colophonium
The dynamic moduluss of each layer in road surface, each layer of bituminous paving having filled up the blank of layered queuing networks old asphalt pavement dynamic parameter is dynamically examined
Survey method and thread gluing device.
The each layer dynamic testing method of bituminous paving of the present invention, is detected, detection side using simple performance experiment instrument (SPT)
Method includes：
Obtain predetermined diameter test specimen, described test specimen is carried out be layered intercepting obtain upper layer core sample, middle surface layer core sample, under
Surface layer core sample；
It is respectively provided with cushion block, lower cushion block on the described upper and lower surface of core sample, described upper cushion block, lower cushion block are gold
Belong to block；
Described core sample is placed in the environmental cabinet of presumptive test temperature, constant temperature 4 to 5 hours is until inside described core sample
Reach presumptive test temperature；
On the face of cylinder of described core sample arrange 6 thread gluing devices, thread gluing device on the face of cylinder of core sample equally
Three row's settings of setting, often arrange the thread gluing device including two axial symmetry settings；Respectively pacify between two thread gluing devices of each row
Fill a displacement transducer；Wherein, described thread gluing device is made up of the first thread gluing and the second thread gluing, and described first thread gluing is horizontal by one
Block and a vertical block are connected with each other composition, and the end face of described horizontal block is connected with described core sample, and other end is connected with described vertical block,
Described second thread gluing is a cubical block structure, and described second thread gluing is connected in described vertical block；
Core sample is placed in load plate carry out loading and tests, core sample is applied offset sine wave or partly just losing ripple axial direction pressure to answer
Power test load, and measure the recoverable axial strain of test specimen, the uniaxial compression in the range of the online viscoelasticity of calculation testing piece is dynamic
Modulus；
Repeat aforesaid operations, core sample is carried out with the test of different predetermined temperatures.
Further, described first thread gluing is L-type structure or T-type structure；In between two second thread gluings of same row
Heart distance is not less than 70mm.
Further, 0.1Hz, 0.5Hz, 1Hz, 5Hz, 10Hz, 25Hz are adopted at a temperature of 5 DEG C, 20 DEG C, 35 DEG C and 50 DEG C
Loading frequency, each layer core sample is applied with skew sine wave or partly just losing ripple axial compression stress, measures the recoverable axial direction of test specimen
Strain, calculates the uniaxial compression dynamic moduluss in the range of the online viscoelasticity of each layer of in-service bituminous paving；Gather last 5 waveforms
Load and deformation curve, record and calculate test be further applied load, test specimen axial direction recoverable deformation, dynamic moduluss and phase angle.
Further, it is provided with politef paper between described backing metal and described core sample；
Described thread gluing device is arranged on the core sample face of cylinder, to upper surface distance be core sample height 1/6 with to lower surface
Distance be core sample height 1/6 between position on.
Further, before loading test, upper cushion block is contacted with upper load plate, adjusts displacement transducer and reset,
Apply test load, precompressed is carried out to test specimen with 5% contact load, continue 10s；
Before loading test, first core sample is carried out loading pretreatment, skew sine wave is applied to test specimen or is partly just losing ripple axle
To compressive stress test load, frequency is 25Hz, 200 circulations.
Further, upper layer is various asphalt materials in the range of 3cm-15cm for the thickness, and middle surface layer is thickness
Various asphalt materials in the range of 5cm-15cm for the size；Cutting optimal is various Colophoniumes in the range of 6cm-15cm for the thickness
Material.
Further, described upper layer core sample is the asphalt uplayer of thickness 4cm；Described middle surface layer core sample is thickness
Surface layer in the Colophonium of size 6cm；Described cutting optimal is the Colophonium cutting optimal of thickness 8cm.
Thread gluing device of the present invention, it is thread gluing used in above-mentioned bituminous paving bituminous paving each layer dynamic testing method
Device, described thread gluing device is made up of the first thread gluing and the second thread gluing, and described first thread gluing is mutually interconnected with a vertical block by a horizontal block
Connect composition, the end face of described horizontal block is connected with described core sample, and other end is connected with described vertical block, described second thread gluing is one
Cubical block structure, described second thread gluing is connected in described vertical block.
Further, described horizontal block and described vertical block are structure as a whole, and described second thread gluing is pasted onto described by glue
In vertical block.
Further, the end face that described horizontal block is pasted with core sample is arc surface structure.
By such scheme, the present invention at least has advantages below：
1st, scrap build cost is less, is not required to extra purchase equipment or test machine is transformed, and only thread gluing need to be entered
Row transformation just can carry out the test that in-service bituminous paving is layered dynamic moduluss.
2nd, can preferably simulate the actual loading situation that existing bituminous paving is born, move to studying old road bituminous paving
State parameter is very necessary.
3rd, breach the core sample size limitation that simple performance test machine (SPT) surveys dynamic moduluss, by script required 15cm with
On core sample ruler cun expand to 3cm-15cm.
4th, can be that maintenance of surface planning carries with effective evaluation in-service bituminous paving layers of material property, structural strength present situation
For valuable parameter.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description
Fig. 1 is the structural representation that bituminous paving of the present invention each layer dynamic testing method and thread gluing device core sample are clamped；
Fig. 2 is that three row's thread gluing devices of bituminous paving of the present invention each layer dynamic testing method and thread gluing device are connected to core sample
On top view；
Fig. 3 is the structural representation of the L-type thread gluing device of bituminous paving of the present invention each layer dynamic testing method and thread gluing device
Figure；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the top view of Fig. 3；
Fig. 6 is the structural representation of the T-shaped thread gluing device of bituminous paving of the present invention each layer dynamic testing method and thread gluing device
Figure.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Hereinafter implement
Example is used for the present invention is described, but is not limited to the scope of the present invention.
The invention provides a kind of each layer dynamic testing method of bituminous paving, by SPT to in-service bituminous paving various materials
Above material, layer, middle surface layer and cutting optimal carry out dynamic moduluss test, and wherein said upper layer is thickness in 3cm-
Various asphalt materials in the range of 15cm, particular for the 4cm modified pitch upper layer in typical asphalt pavement structure；Middle surface layer
For various asphalt materials in the range of 5cm-15cm for the thickness, modified particular for the 6cm in typical asphalt pavement structure
Surface layer in Colophonium；Cutting optimal is various asphalt materials in the range of 6cm-15cm for the thickness, particular for typical asphalt road
8cm plain asphalt cutting optimal in the structure of face.Described asphalt material is the compound such as plain asphalt, modified pitch, rubber asphalt
(including SMA, AC, Supave, AK, OGFC, ATB, PA etc., and various regeneration surface layer, milling overlay surface layer etc.).
The each layer dynamic testing method of bituminous paving of the present invention, is detected using simple performance experiment instrument (SPT), including：
Obtain predetermined diameter test specimen, described test specimen is carried out be layered intercepting obtain upper layer core sample, middle surface layer core sample, under
Surface layer core sample；
It is respectively provided with cushion block, lower cushion block 3 on the described upper and lower surface of core sample 1, described upper cushion block, lower cushion block are
Metal derby；
Described core sample is placed in the environmental cabinet of presumptive test temperature, constant temperature 4 to 5 hours is until inside described core sample
Reach presumptive test temperature；
On the face of cylinder of described core sample arrange 6 thread gluing devices 2, thread gluing device on the face of cylinder of core sample equally
Three row's settings of setting, often arrange the thread gluing device including two axial symmetry settings；Respectively pacify between two thread gluing devices of each row
Fill a displacement transducer；Wherein, described thread gluing device is made up of the first thread gluing and the second thread gluing, and described first thread gluing is horizontal by one
Block 21 and a vertical block 22 are connected with each other composition, and the end face of described horizontal block is connected with described core sample, other end and described vertical block
Connect, described second thread gluing 23 is a cubical block structure, and described second thread gluing is connected in described vertical block；
Core sample is placed in load plate carry out loading and tests, core sample is applied offset sine wave or partly just losing ripple axial direction pressure to answer
Power test load, and measure the recoverable axial strain of test specimen, the uniaxial compression in the range of the online viscoelasticity of calculation testing piece is dynamic
Modulus；
Repeat aforesaid operations, core sample is carried out with the test of different predetermined temperatures.
Embodiment 1
The present embodiment bituminous paving each layer dynamic testing method, comprises the following steps：
(1) test specimen prepares：On the way drill core takes the test specimen of 150mm diameter, drills through a diameter of 100 core sample indoors, so
Intercept each layer of compound with double-side saw afterwards, and deposit under 5～27 DEG C of environment, the time was no more than two weeks；
(2) paste thread gluing：Manually the thread gluing (see accompanying drawing 3) that 6 L-shaped customize is attached to around core sample first, circumferentially etc.
Spacing lays 3 row 6 (i.e. every 2 rows are at a distance of 120 °).With the special equipment pasting thread gluing, the second thread gluing is fixed on 6 the first thread gluings
On, then displacement transducer is placed between every row's thread gluing so as to vertical with test specimen end face, adjusts displacement transducer so as to measurement
Scope can measure the compression in the middle part of test specimen；
(3) metal lower cushion block is positioned over the center of load plate, paving one strata tetrafluoroethene paper is (for reducing metal gasket
Frictional resistance between block and core sample, thus reduce end effect), then the in-service blacktop of well cutting is placed on above,
Repave a strata tetrafluoroethene, effect ibid, then upper cushion block is positioned on core sample it is ensured that core sample is in center；
(4) test specimen is put in the environmental cabinet of regulation test temperature ± 0.5 DEG C, constant temperature 4～5h is until reach inside test specimen
Test temperature；
(5) it is possible to proceed by loading test after the temperature inside and outside test specimen reaches test temperature.By upper cushion block with
Upper load plate gentle touchdown, adjusts displacement transducer and resets, and applies test load, with 5% contact load, test specimen is carried out
Precompressed, is continued 10s, so that test specimen is contacted well with upper and lower load plate；
(6) test specimen is applied with skew sine wave or partly just losing ripple axial compression stress test load, at a set temperature from by
High frequency tremendously low frequency, that is, 25Hz～0.1Hz repeat loading and tested.Before test, first test specimen is carried out loading pretreatment, in advance
The method processing is to apply skew sine wave to test specimen or partly just losing ripple axial compression stress test load, and frequency is 25Hz, 200
Circulation.Test gathers the load of last 5 waveforms and deformation curve, records and calculate that test is further applied load, test specimen axially can be extensive
Multiple deformation, dynamic moduluss and phase angle；
(7) this test specimen is carried out with next temperature test, temperature selects to be carried out by low temperature to high temperature from 5～50 DEG C.Work as examination
When the test of part each frequency under each design temperature adds up plastic deformation more than 1500 μm, this test specimen is discarded.
Drill through road surface core sample at the rut disease of certain highway, at normal section wheel path and at curb, always
Totally three core samples, mix type is modified pitch AC-20, and the time limit that is open to traffic is more than 10 years, and middle surface layer is from being open to traffic so far
It is not affected by any punishment right, now its dynamic modulus is tested, concrete operation step is as follows：
1. core drilling machine is fixed with road surface core sample it is ensured that core drilling machine drill bit is perpendicular with core sample section, open core drilling machine
Rig takes out the test specimen of a diameter of 100mm, rinses well, marks the contact surface between each layer with watercolor pencil, finally uses double-pole
Saw cuts surface layer in 6cm, after core sample takes out, the diameter of measurement test specimen.At the middle part of test specimen with away from upper and lower surface 1/3 height of specimen
3 its diameters of position finding, each position both sides twice, every side once after, test specimen is rotated 90 ° and surveys once again, Ran Houji
Calculate the meansigma methodss of 6 diameter measurementsAnd standard deviation.If standard deviation is more than 2.5mm, give up this test specimen.For diameter symbol
Close the test specimen requiring, meansigma methodssDiameter as test specimen is used for subsequent calculations, accurately to 0.1mm, core sample need to be 5 in temperature
Preserve under～27 DEG C of environment, when depositing, core sample is not stackable；
2. 6 the first thread gluings (see accompanying drawing 1 to 2) are attached to around core sample by hand, between the position of the first thread gluing is circumferentially waited
Away from laying 3 row 6 (i.e. every 2 rows at a distance of 120 °), then coat special glue to outside the first thread gluing, the second thread gluing is placed on
In the groove of patch thread gluing machine, start thread gluing equipment, then the second thread gluing is fixed in 6 the first thread gluings patch thread gluing special equipment,
After glue plays one's part to the full, clip is clipped in and carries on thread gluing, then displacement transducer is placed in every row's thread gluing folder
So as to vertical with test specimen end face between son, regulation displacement transducer is so as to the compression that measurement range can measure in the middle part of test specimen becomes
Shape；
3. test specimen is put in the environmental cabinet of 5 ± 0.5 DEG C of regulation test temperature, environmental cabinet require temperature control scope -10～
60 DEG C, temperature control accuracy exceedes ± 0.5 DEG C, and has certain capacity, and core sample is placed on 4～5h in environment incubator until trying
Test temperature is reached inside part；
4. the AMPT tester (a kind of SPT equipment) that present example is produced using Australian IPC company is to core sample
Dynamic moduluss are surveyed, and the diameter 100mm metal lower cushion block of customization are positioned over the center of AMPT load plate, in metal
Cushion block upper berth one strata tetrafluoroethene paper (for reducing the frictional resistance between backing metal and core sample, thus reducing end effect),
Then posted surface layer core sample in the 6cm of thread gluing above to be positioned on politef paper, repaved a strata tetrafluoroethene, made
With ibid, then upper cushion block being positioned on core sample it is ensured that core sample is in the center of load plate；
5. open AMPT equipment, temperature is set as 5 DEG C, the temperature inside and outside test specimen reach after test temperature it is possible to
Proceed by loading test, upper cushion block and upper load plate gentle touchdown adjust displacement transducer and reset, apply test lotus
Carry, precompressed is carried out to test specimen with 5% contact load, continue 10s, so that test specimen is contacted well with upper and lower load plate；
6. pair core sample applies skew sine wave or is partly just losing ripple axial compression stress test load, by compiling under the conditions of 5 DEG C of temperature
From high frequency tremendously low frequency, that is, 25Hz～0.1Hz repeats loading and is tested good program, frequency be respectively 25Hz, 10Hz, 5Hz,
1Hz, 0.5Hz, 0.1Hz, confined pressure is 0kPa, repeats loading number of times and see table under each frequency.Before test, first test specimen is entered
Row loads pretreatment, and the method for pretreatment is to apply skew sine wave to test specimen or partly just losing ripple axial compression stress test load,
Frequency is 25Hz, 200 circulations.Test acquisition system adopts microcomputer to control, and can measure and record test specimen in each loaded cycle
Middle born xial feed and the axial deformation producing, measure load and the deformation curve of last 5 waveforms, record and calculate
Test is further applied load, test specimen axial direction recoverable deformation, dynamic moduluss and phase angle；
| Frequency (Hz) | Number of repetition (secondary) | Frequency (Hz) | Number of repetition (secondary) |
| 25 | 200 | 1 | 25 |
| 10 | 200 | 0.5 | 25 |
| 5 | 100 | 0.1 | 15 |
7. core sample is taken out, Temperature of Warm Case is adjusted to 20 DEG C, then be positioned over 4～5h in incubator by taking out core sample, until examination
Reach 20 DEG C of test temperature, repeat the above steps 4,5,6 inside part, more next temperature test is carried out to this test specimen, until 4
Temperature test completes；
3 core samples are adopted same test operation by repeat the above steps, measure last 5 loadings under each test condition
The average amplitude Pi of load and axial deformation average amplitude can be recovered in circulation, and deformation peak value and load under same loaded cycle
The average lag-time t of peak value, then calculates the dynamic moduluss of surface layer and phase angle in core sample.
Middle surface layer dynamic moduluss result
Dynamic modulus value order under mutually synthermal, same frequency be can be seen that by above-mentioned dynamic moduluss measured data result
At ＞ rut disease at curb ＞ normal section rut, illustrate that the high-temperature stability at rut disease is actually lower than curb normal
Level, test data has preferable discrimination, how can distinguish the high-temperature behavior in each section.
This testing scheme is simple to operate, available script testing equipment, has saved the equipment cost of exploitation test, has had
Preferably economic benefit, and the data finally giving has preferable discrimination, can be as very valuable dynamic parameter, to not
Carrying out present situation residing for the in-service bituminous paving of layered queuing networks provides technical support.
Embodiment 2
The present embodiment thread gluing device, it is the bituminous paving bituminous paving each layer dynamic detection described in above-described embodiment 1
Thread gluing device used in method, described thread gluing device is made up of the first thread gluing and the second thread gluing, and described first thread gluing is horizontal by one
Block and a vertical block are connected with each other composition, and the end face of described horizontal block is connected with described core sample, and other end is connected with described vertical block,
Described second thread gluing is a cubical block structure, and described second thread gluing is connected in described vertical block.The thread gluing of the present embodiment
Device is of an L-shaped structure, referring to Fig. 3 to shown in 5.
In the present embodiment, described cube thread gluing is pasted onto in described vertical block by glue.Described horizontal block and described vertical block
It is structure as a whole.
During use, 6 the first thread gluings are attached to around core sample by hand, the position of the first thread gluing circumferentially equidistantly lays 3
Row 6 (i.e. every 2 rows are at a distance of 120 °), then coat special glue to outside the first thread gluing, the second thread gluing is placed on patch thread gluing
In the groove of machine, start thread gluing equipment, then the second thread gluing is fixed in 6 the first thread gluings patch thread gluing special equipment, treats glue
After playing one's part to the full, clip is clipped in and carries on thread gluing, then displacement transducer is placed between every row's thread gluing clip,
Make it vertical with test specimen end face, adjust displacement transducer so as to measurement range can measure the compression in the middle part of test specimen.
Embodiment 3
The present embodiment thread gluing device, with above-described embodiment 2 the difference is that only the T-shaped structure of described thread gluing device,
Referring to Fig. 6.
In the various embodiments described above, described thread gluing device is arranged on the core sample face of cylinder, and the distance to upper surface is that core sample is high
Degree 1/6 and the distance to lower surface are on the position between core sample height 1/6.
In the various embodiments described above, in order to the connection of horizontal block and core sample, end that described horizontal block with core sample pasted are better achieved
Face is arc surface structure, and the structure of described arc surface is adapted with the arc surface of described core sample.
The above is only the preferred embodiment of the present invention, is not limited to the present invention it is noted that for this skill
For the those of ordinary skill in art field, on the premise of without departing from the technology of the present invention principle, can also make some improve and
Modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (10)
1. each layer dynamic testing method of a kind of bituminous paving, using simple performance experiment instrument（SPT）Detected, its feature exists
In detection method includes：
Obtain the test specimen of predetermined diameter, described test specimen is carried out with layering intercepting and obtains upper layer core sample, middle surface layer core sample, cutting optimal
Core sample；
It is respectively provided with cushion block, lower cushion block on the described upper and lower surface of core sample, described upper cushion block, lower cushion block are metal derby；
Described core sample is placed in the environmental cabinet of presumptive test temperature, constant temperature reaches up to inside described core sample for 4 to 5 hours
Presumptive test temperature；
6 thread gluing devices are arranged on the face of cylinder of described core sample, thread gluing device is equally arranged on the face of cylinder of core sample
Three rows' settings, often row includes the thread gluing device that two axial symmetry are arranged；Each installation one between two thread gluing devices of each row
Individual displacement transducer；Wherein, described thread gluing device is made up of the first thread gluing and the second thread gluing, described first thread gluing by a horizontal block and
One vertical block is connected with each other composition, and the end face of described horizontal block is connected with described core sample, and other end is connected with described vertical block, described
Second thread gluing is a cubical block structure, and described second thread gluing is connected in described vertical block；
Core sample is placed in load plate and carries out loading test, core sample is applied with skew sine wave or is partly just losing the survey of ripple axial compression stress
Examination load, and measure the recoverable axial strain of test specimen, the uniaxial compression dynamic moduluss in the range of the online viscoelasticity of calculation testing piece；
Repeat aforesaid operations, core sample is carried out with the test of different predetermined temperatures.
2. each layer dynamic testing method of bituminous paving according to claim 1 is it is characterised in that described first thread gluing is L
Type structure or T-type structure；
Centre distance between two second thread gluings of same row is not less than 70mm.
3. each layer dynamic testing method of bituminous paving according to claim 1 is it is characterised in that at 5 DEG C, 20 DEG C, 35 DEG C
And at a temperature of 50 DEG C, adopt 0.1Hz, 0.5 Hz, 1 Hz, 5 Hz, 10 Hz, the loading frequency of 25 Hz, each layer core sample is applied partially
Move sine wave or partly just losing ripple axial compression stress, measure the recoverable axial strain of test specimen, calculate each layer of in-service bituminous paving and exist
Uniaxial compression dynamic moduluss in the range of line viscoelasticity；Gather load and the deformation curve of last 5 waveforms, record and calculate survey
Examination is further applied load, test specimen axial direction recoverable deformation, dynamic moduluss and phase angle.
4. each layer dynamic testing method of bituminous paving according to claim 1 it is characterised in that described first cushion block,
It is respectively equipped with politef paper between two cushion blocks and described core sample；
Described thread gluing device is arranged on the core sample face of cylinder, to upper surface distance be core sample height 1/6 with to lower surface away from
On position between for core sample height 1/6.
5. each layer dynamic testing method of bituminous paving according to claim 1 be it is characterised in that before loading test,
Upper cushion block is contacted with upper load plate, adjusts displacement transducer and reset, apply test load, with 5% contact load to test specimen
Carry out precompressed, continue 10s；
Before loading test, first core sample is carried out loading pretreatment, test specimen is applied offset sine wave or partly just losing ripple axially to press
Stress test load, frequency is 25Hz, 200 circulations.
6. each layer dynamic testing method of bituminous paving according to claim 1 is it is characterised in that upper layer is thickness
Various asphalt materials in the range of 3cm-15cm, middle surface layer is various Colophonium materials in the range of 5cm-15cm for the thickness
Material；Cutting optimal is various asphalt materials in the range of 6cm-15cm for the thickness.
7. each layer dynamic testing method of bituminous paving according to claim 6 is it is characterised in that described upper layer core sample is
The asphalt uplayer of thickness 4cm；Surface layer in the Colophonium for thickness 6cm for the described middle surface layer core sample；Described cutting optimal is
The Colophonium cutting optimal of thickness 8cm.
8. a kind of thread gluing device is it is characterised in that it is claim 1 to the arbitrary described each layer of bituminous paving bituminous paving of X
Thread gluing device used in dynamic testing method, described thread gluing device is made up of the first thread gluing and the second thread gluing, and described first glues
Button be connected with each other and formed by a horizontal block and a vertical block, the end face of described horizontal block is connected with described core sample, other end with described
Vertical block connects, and described second thread gluing is a cubical block structure, and described second thread gluing is connected in described vertical block.
9. thread gluing device according to claim 8 is it is characterised in that described horizontal block and described vertical block are structure as a whole, institute
State the second thread gluing to be pasted onto in described vertical block by glue.
10. thread gluing device according to claim 8 is it is characterised in that the end face that described horizontal block is pasted with core sample is circular arc
Face structure, the structure of described arc surface is adapted with the arc surface of described core sample.
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| CN110068498B (en) * | 2019-03-15 | 2021-08-06 | 同济大学 | Dynamic mechanical analysis method for viscoelasticity of asphalt mixture |
| CN110686969A (en) * | 2019-04-03 | 2020-01-14 | 东南大学 | Method for testing dynamic modulus of asphalt mixture in semicircular bending loading mode |
| CN110455651A (en) * | 2019-08-12 | 2019-11-15 | 武汉理工大学 | A kind of antifatigue cracking performance evaluation method of bituminous pavement based on cuboid test specimen |
| CN111175117A (en) * | 2019-12-27 | 2020-05-19 | 江苏东南特种技术工程有限公司 | Method for detecting load of vertical structure of existing building by intercepting concrete structure test piece |
| CN112014218A (en) * | 2020-09-16 | 2020-12-01 | 山东电力设备有限公司 | Compression ratio measuring method |
| CN112326421A (en) * | 2020-09-28 | 2021-02-05 | 山东省交通科学研究院 | Dynamic modulus test method for asphalt mixture |
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