CN103353428B - Bituminous pavement tack coat resists ' from top to bottom ' split test method - Google Patents
Bituminous pavement tack coat resists ' from top to bottom ' split test method Download PDFInfo
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- CN103353428B CN103353428B CN201310283264.8A CN201310283264A CN103353428B CN 103353428 B CN103353428 B CN 103353428B CN 201310283264 A CN201310283264 A CN 201310283264A CN 103353428 B CN103353428 B CN 103353428B
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Abstract
The invention relates to a kind of bituminous pavement tack coat anti-' from top to bottom ' and split test method, its step is, first makes shaping composite samples, and in the middle part of shaping composite samples, arranges stress concentrate hole; Then concentrate around hole at the stress on shaping composite samples surface and deformation measurement instrument is installed; Again shaping composite samples is put into after load pacer applies the fixed load of 45-65N, be 1 second to the cyclic load cycle that shaping composite samples applies, comprise 0.1 second semisinusoidal shape and load and 0.9 second rest semisinusoidal type cyclic load.Finally by distortion sudden change record 6 loop-around datas of deformation measurement instrument observation, and load cycle index N is utilized to evaluate anti-' from top to bottom ' cracking performance of bonding layer material with destruction speed K two indices.Under making its loading mode more reflect real road load action, the discreteness of the stress dissipation capability test findings of bonding layer material reduces, and saves test material, easy and simple to handle, thus is more suitable for practicality.
Description
Technical field
The present invention relates to a kind of material cracking resistance test method of highway pavement field, particularly relate to a kind of anti-' from top to bottom ' the split test method of bituminous pavement tack coat.
Background technology
From top to bottom (Top-down) cracking come from road surfaces wheel path near and expand downwards in time.It is one of chief destructive type of Open grade friction course bituminous pavement; This is because open gradation asphalt has extremely low energy to failure compared with dense bitumen compound.For ensureing that Open grade friction course has anti-(top-down) cracking performance from top to bottom preferably, being everlasting between wearing course and its structural sheet and laying modified emulsifying asphalt sticking layer oil; Experiment Road result shows that this modified emulsifying asphalt can significantly improve anti-(top-down) cracking performance from top to bottom of wearing course.The modified emulsifying asphalt being layed in interlayer upwards can move and enters wearing course space and form the rich bitumeniferous Special Mixed bed of material at interlayer in wearing course roller compaction process.
For considering the interaction between tack coat and brea bed, need the shaping composite samples containing bonding layer material; Be anti-(top-down) dehiscence process from top to bottom of simulation, the destructive process of composite samples need comprise crackle crack initiation and expansion two parts simultaneously.The test method of Evaluation: Current asphalt tensile property, comprise disk tension test (Disk-shapedcompacttension, DCT), semi-circular curvature test (semi-circularbending, SCB), Superpave indirectly draws high test (SuperpaveIDT) and directly draws high test (Uniaxialtensiontest), all can only be used for evaluating homogenous material.Meanwhile, be used for evaluating sandwich material cracking resistance test method and all need the larger test specimen of physical dimension, and this type of test specimen is difficult to indoor and outdoor shaping.
Current main employing shear strength test evaluates tack coat interlayer situation.Tack coat between these class methods supposition finishing coat and structural sheet is a thin layer.Dull load mode in shearing test method and real road traffic loading pattern are not inconsistent.In shearing test method, crackle is along interlayer Directional Extension in anti-(top-down) split test from top to bottom of tack coat, and crackle needs edge perpendicular to interlayer Directional Extension.Therefore shearing test method cannot be adopted to evaluate the anti-top-down cracking performance of bonding layer material.
As can be seen here, above-mentioned existing homogenous material method of evaluating performance and tack coat shearing test method cannot be used for evaluating the anti-cracking performance from top to bottom of bonding layer material, and are urgently further improved.Solving existing test method resists cracking performance test method from top to bottom defect at evaluation bonding layer material, is obviously the anxious problem for solving of relevant dealer.
Summary of the invention
The object of the invention is to, overcome existing test method and evaluate the defect existed in bonding layer material cracking resistance, and provide a kind of new bituminous pavement tack coat anti-' from top to bottom ' to split test method, technical matters to be solved is under making its loading mode more reflect real road load action, the discreteness of the stress dissipation capability test findings of bonding layer material reduces, save test material thus be more suitable for practicality, and there is the value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of bituminous pavement tack coat proposed according to the present invention anti-' from top to bottom ' splits test method, and it comprises the following steps:
Step 1: make shaping composite samples
Gyratory compaction test specimen is joined, shaping rear test specimen diameter 150mm, highly about 110mm by the shaping intensive of Superpave gyratory compaction;
Two are divided into saw, all as structural sheet from this shaping intensive joining in the middle part of gyratory compaction test specimen;
Newly cut on the surface at two structural sheet test specimens, evenly apply bonding layer material respectively;
Again each structural sheet test specimen is reentered into gyratory compaction mould from bottom, thereon by the loose wearing course ground surface material that the mode compacting of the height of structural sheet test specimen after control compacting mixes, forms two composite samples;
Cut along being parallel to diametric(al) by each composite samples saw in two composite samples, the thickness after cutting is 38.1mm, then cuts along short transverse, and the wearing course after cutting and depth of structural layer direction thickness are respectively 25.4mm; After treating test specimen drying, then by two composite samples along wearing course surface epoxy resin be
productE-20HP is bonded together, and forms the shaping composite samples of new symmetric form;
If bore the composite samples that core gained is made up of wearing course and structural sheet from scene, directly composite samples saw is cut along being parallel to diametric(al), thickness after cutting is 38.1mm, then cuts along short transverse, and the wearing course after cutting and depth of structural layer direction thickness are respectively 25.4mm; After treating test specimen drying, then by two shaping composite samples along wearing course surface epoxy resin be
productE-20HP is bonded together, and forms the shaping composite samples of new symmetric form;
Be finally that 19.05mm drill bit arranges stress and concentrates hole and as the position of load application in the middle part of this shaping composite samples with external diameter;
Step 2: install distortion gauge
Paste deformation measurement instrument stationary installation on shaping composite samples surface and in deformation measurement instrument stationary installation, deformeter be installed, before test should in the environmental cabinet (1) constant temperature at least 3 hours; Then on shaping composite samples surface, deformation measurement instrument is installed;
Step 3: load
Shaping composite samples is put into load pacer and at shaping composite samples) the upper fixed load applying 45-65N to be to ensure the good contact between shaping composite samples and load pacer;
The cyclic load cycle applied on this shaping composite samples is again 1 second, comprises 0.1 second semisinusoidal shape and loads and 0.9 second rest semisinusoidal type cyclic load;
The choosing of load peak value should meet in 3-4 hour, complete test while have time of enough dissipation stress;
Step 4: record data
The distortion observed by deformation measurement instrument undergo mutation or experimenter whenever necessary, test operation person namely record 6 circulation test figures, the time span of each circulation is 1 second, altogether gather 500 data points; The data gathered comprise the total deformation in deformation measurement instrument data, time, load, test;
Step 5 processes data
Under Fatigue Load, the crack tip distortion of peak value and valley change is there is in deformation measurement instrument record with load, the peak value of each circulation and the difference of valley, here take off a circulation start before distortion minimum value, as the resilience of this shaping this circulation of composite samples, steady-state deformation phase slope in resilience and time curve is defined as and destroys speed K, when being destroyed by shaping composite samples, Fatigue Load number of times is defined as load cycle index N, reciprocal relation is there is between this destruction speed K and this load cycle index N, destroy speed K less, load cycle index N is larger, anti-' from top to bottom ' cracking performance of bonding layer material is better, load cycle index N is utilized to evaluate anti-' from top to bottom ' cracking performance of bonding layer material with destruction speed K two indices.
Aforesaid a kind of bituminous pavement tack coat anti-' from top to bottom ' splits test method, wherein said shaping composite samples top layer is the second structural sheet from bottom to top, second wearing course, first wearing course, first structural sheet, installing deformation measurement instrument on described shaping composite samples surface is concentrate around described stress on the first wearing course of the surrounding in hole and the second wearing course to install this deformation measurement instrument multiple.
Aforesaid bituminous pavement tack coat anti-' from top to bottom ' splits the pilot system that test method adopts, comprise: environmental cabinet, MTS loading system and data acquisition system (DAS) composition, this MTS loading system device is in environmental cabinet, described MTS loading system loads axle MTS pedestal by MTS, load pacer, loading fixture forms, wherein, this MTS pedestal is contained in the bottom of environmental cabinet, this MTS pedestal is placed with the first loading fixture, second loading fixture is housed below load pacer, carry between fixture and the second loading fixture at the first folder and place shaping composite samples, MTS is housed on this load pacer and loads axle, described first folder carries fixture and has the inner concave arc surface adapted with the bottom surface radian of shaping composite samples, described second folder carries fixture and has the inner concave arc surface adapted with the end face radian of shaping composite samples.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.Propose according to the present invention
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid (title), wherein said
By technique scheme, the present invention at least has following advantages:
(1) test method can be used for evaluating the anti-top-down cracking performance of bonding layer material;
(2), compared with testing with classic fatigue, the discreteness of test findings reduces greatly;
(3) method for making of test specimen can adopt the indoor shaping or on-the-spot unbearable test specimen of employing of gyratory compaction method, and compared with the test specimen in other tack coat and stress absorbing layer crazing-resistance test, its operability improves greatly;
(4) the method can be used for evaluating the type of bonding layer material and consumption thereof, has directive significance for choose reasonable tack coat and stress absorbing layer.
(5) the method is through suitably improving the Reflection Cracking performance that can be used to evaluate bonding layer material and GSZ equal stress absorption layer.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the shaping composite samples structural representation of the present invention;
Fig. 2 is load mode schematic diagram of the present invention;
Fig. 3 is resilience conceptual schematic view of the present invention;
Fig. 4 is resilience of the present invention change curve schematic diagram in time;
Fig. 5 is load cycle index schematic diagram of the present invention;
Fig. 6 is that the present invention destroys speed schematic diagram;
Fig. 7 is loading system structural representation of the present invention;
Fig. 8 is embodiments of the invention load cycle index test findings histogram;
Fig. 9 is that embodiments of the invention destroy speed trial result histogram;
Wherein:
1: environmental cabinet 2:MTS loads axle
3:MTS pedestal 4: load pacer
5-1 first presss from both sides and carries fixture 5-2: the second loading fixture
6: shaping composite samples
6-1: the first structural sheet 6-2: the first wearing course
6-3: the second wearing course 6-4: the second structural sheet
7: load 8: deformeter
9: crack
L: load T1: the time (sec)
D: deformation measurement instrument distortion (mm) E: resilience
T3: time (sec) T2: the time (sec)
W: stabilization sub stage K: destroy speed
N: load cycle index
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, test method its concrete test method, feature and effect thereof are split to the bituminous pavement tack coat proposed according to the present invention anti-' from top to bottom ', is described in detail as follows.
Embodiment 1:
Refer to shown in Fig. 1-9, the bituminous pavement tack coat anti-' from top to bottom ' of present pre-ferred embodiments splits test method, and it mainly comprises the following steps:
Step 1: make type composite samples, as shown in Figure 1
1) roll dense bitumen compound with SHRP gyratory compaction equipment, wherein aggregate is 4500 grams, bitumen content is 4.8%.Shaping rear test specimen voidage is 4%, is highly 110mm, diameter 150mm.
2) the gyratory compaction test specimen after this is shaping breaks it into two from middle part saw, and both are structural sheet i.e. the first structural sheet 6-1 and the second structural sheet 6-4.This first structural sheet 6 ?1 and second structural sheet 6 ?4 surface of newly cutting evenly apply traditional sticking layer oil and modified emulsifying asphalt sticking layer oil respectively, its consumption is respectively 0.2025L/m
2and 1.5L/m
2.
3) by apply the first structural sheet 6 after sticking layer oil ?1 to be reentered into compaction tool from gyratory compaction mould bottom, and roll thereon open gradation asphalt i.e. the first wearing course 6 ?2.Roll rear open gradation asphalt first wearing course 6 ?2 height be 38.1mm, form composite samples.
By apply the first structural sheet 6 after sticking layer oil ?4 to be reentered into compaction tool from gyratory compaction mould bottom, and roll thereon open gradation asphalt i.e. the second wearing course 6 ?3 form composite samples.Roll rear open gradation asphalt second wearing course 6 ?3 height be 38.1mm, form composite samples.
4) cut composite samples along gyratory compaction gained composite samples along being parallel to diametric(al), after cutting, thickness is 38.1mm.And along short transverse, this composite samples is cut, the height of the close-graded structural sheet after cutting and the wearing course of open gradation is 25.4mm.Another composite samples cuts with aforesaid way.
5) after these two composite samples dryings, adopt epoxy resin namely
productE-20HP is by above-mentioned 4) gained two composite samples bond along Open grade friction course surface, form the shaping composite samples 6 of new symmetric form, this shaping composite samples 6 is by the second structural sheet 6-4 from bottom to top from top layer, second wearing course 6-3, first wearing course 6-2, the first structural sheet 6-1 forms.
6) adopt drill bit at this shaping composite samples 6 centre of surface, along perpendicular to thickness direction, drilling through diameter is that the stress of 19.05mm concentrates hole.
Step 2: install distortion gauge, as shown in Figure 1
1) shaping composite samples 6 to be tested is put into environmental cabinet 1 constant temperature, at least constant temperature 3 hours before test.Here probe temperature is 10 ° of C.
2) concentrate on the surrounding first wearing course 6-2 in hole and the second wearing course 6-3 around stress on this shaping composite samples surface and paste 4 deformation measurement instrument stationary installations, and in these 4 deformation measurement instrument stationary installations, 4 deformeters are installed.
Step 3: load, as shown in Figure 7
This shaping composite samples is put into load pacer 4 and the fixed load applying 45-65N on this shaping composite samples to ensure the good contact between this shaping composite samples 6 and load pacer 4;
On this shaping composite samples 6, applying the cyclic load cycle is again 1 second, comprises 0.1 second semisinusoidal type and loads and 0.9 second rest semisinusoidal type cyclic load, as shown in Figure 2.The load applied is 2500N.
Step 4: record data
The distortion of deformation measurement Continuous Observation crack tip in process of the test.If the distortion observed by deformation measurement instrument 8 is undergone mutation or experimenter whenever necessary, namely test operation person records the test figures of 6 circulations, and each cycling time, length was gather 500 data points altogether in 1 second; The data gathered comprise the total deformation in deformation measurement instrument data, time, load, test.
Step 5: process data
Fig. 3 is resilience conceptual schematic view of the present invention, and it represents under cyclic load, and crack tip is out of shape relation curve over time.In figure, E is the definition of resilience.Under Fatigue Load, deformation measurement instrument 8 records the crack tip distortion occurring peak value and valley change with load, the peak value of each circulation and the difference of valley, here take off a circulation start before distortion minimum value, for the resilience of this shaping this circulation of composite samples, adopt the matrix labotstory MATLAB program of writing voluntarily, process deformation measurement instrument is recorded, extract crack tip resilience delta data in time.
Fig. 4 is resilience of the present invention change curve schematic diagram in time.It represents under cyclic load, crack tip resilience relation curve over time.The slope of the steady-state deformation stage W in resilience and time curve is defined as and destroys speed K, when being destroyed by shaping composite samples, Fatigue Load number of times is defined as load cycle index N, shows that the rate of curve K of stabilization sub stage W in resilience and time curve can reflect that namely ' from top to bottom ' crack growth rate destroys speed thus '.And shaping composite samples 6 when destroying Fatigue Load number of times be load cycle index N, reciprocal relation is there is between this destruction speed K and this load cycle index N, destroy speed K less, load cycle index N is larger, anti-' from top to bottom ' cracking performance of bonding layer material is better, utilizes load cycle index N to evaluate anti-' from top to bottom ' cracking performance of bonding layer material with destruction speed K two indices.
Fig. 5 is load cycle index schematic diagram of the present invention.When indicating three kinds of bonding layer material composite samples destruction under same loop load action in Fig. 5, load ringing number of times.From this Fig. 5, this test method can distinguish anti-' from top to bottom ' cracking performance of different bonding layer material.
Fig. 6 is that the present invention destroys speed schematic diagram.The result of the destruction speed K of three kinds of bonding layer material composite samples under same loop load action is indicated in Fig. 6.From this Fig. 6, destroy speed K result and can react in test specimen destructive process, the damage accumulation rate of material.Destroy between speed K and cycle index N and there is reciprocal relation.
The present embodiment is to traditional sticking layer oil (0.2025L/m
2) and modified emulsifying asphalt (1.5L/m
2) test specimen carries out three groups of tests respectively, acquired results is as shown in Figure 8 and Figure 9.
Fig. 8 is modified emulsifying asphalt sticking layer oil (1.5L/m under same loop load action
2) and traditional sticking layer oil (0.2025L/m
2) shaping composite samples is when destroying, load ringing number of times.From this figure, modified emulsifying asphalt sticking layer oil can significantly improve anti-' from top to bottom ' cracking performance of composite samples.In addition, test findings also shows, the repeatability between test specimen and test specimen result is fine, and compared with testing with classic fatigue, discreteness reduces greatly.
Fig. 9 is modified emulsifying asphalt sticking layer oil (1.5L/m under same loop load action
2) and traditional sticking layer oil (0.2025L/m
2) the destruction rating results of shaping composite samples.From this figure, modified emulsifying asphalt sticking layer oil significantly can reduce the destruction accumulation rate of shaping composite samples, thus improves anti-' from top to bottom ' cracking performance.
Embodiment 2
The bituminous pavement tack coat anti-' from top to bottom ' of present pre-ferred embodiments splits test method, and it mainly comprises the following steps:
Step 1: make type composite samples
To the composite samples that scene brill core gained is made up of wearing course and structural sheet, cut along being parallel to diametric(al) composite samples, after cutting, thickness is 38.1mm.And along short transverse, this composite samples is cut, the height of the close-graded structural sheet after cutting and the wearing course of open gradation is 25.4mm.After these two composite samples dryings, adopt epoxy resin namely
these two composite samples of ProductE-20HP bond along Open grade friction course surface, and form the shaping composite samples 6 of new symmetric form, other steps are with embodiment 1.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, but every content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. anti-' from top to bottom ' split test method of bituminous pavement tack coat, is characterized in that, comprise the following steps:
Step 1: make shaping composite samples
Gyratory compaction test specimen is joined by the shaping intensive of Superpave gyratory compaction;
Two are divided into saw, all as structural sheet from this shaping intensive joining in the middle part of gyratory compaction test specimen;
Newly cut on the surface at two structural sheet test specimens, evenly apply bonding layer material respectively;
Again each structural sheet test specimen is reentered into gyratory compaction mould from bottom, thereon by the loose wearing course ground surface material that the mode compacting of the height of structural sheet test specimen after control compacting mixes, forms two composite samples;
Cut along being parallel to diametric(al) by each composite samples saw in two composite samples, the thickness after cutting is 38.1mm, then cuts along short transverse, and the wearing course after cutting and depth of structural layer direction length are respectively 25.4mm; After treating test specimen drying, then by two composite samples along wearing course surface epoxy resin be
be bonded together, form the shaping composite samples (6) of new symmetric form;
If bore the composite samples that core gained is made up of wearing course and structural sheet from scene, directly composite samples saw is cut along being parallel to diametric(al), thickness after cutting is 38.1mm, then cuts along short transverse, and the wearing course after cutting and depth of structural layer direction thickness are respectively 25.4mm; After treating test specimen drying, then by two shaping composite samples along wearing course surface epoxy resin be
be bonded together, form the shaping composite samples (6) of new symmetric form;
Be finally that 19.05mm drill bit arranges stress and concentrates hole and as the position of load application in the middle part of this shaping composite samples with external diameter;
Step 2: install distortion gauge
Paste deformation measurement instrument stationary installation on shaping composite samples (6) surface and in deformation measurement instrument stationary installation, deformeter (8) be installed, before test should in the environmental cabinet (1) constant temperature at least 3 hours; Then on shaping composite samples surface, deformation measurement instrument (8) is installed;
Step 3: load
Shaping composite samples put into load pacer (4) and above apply the fixed load of 45-65N to ensure the good contact between shaping composite samples (6) and load pacer (4) at shaping composite samples (6);
The cyclic load cycle above applied at this shaping composite samples (6) is again 1 second, comprises 0.1 second semisinusoidal shape and loads and 0.9 second rest semisinusoidal type cyclic load;
The choosing of load peak value should meet in 3-4 hour, complete test while have time of enough dissipation stress;
Step 4: record data
The distortion observed by deformation measurement instrument (8) undergo mutation or experimenter whenever necessary, test operation person namely record 6 circulation test figures, the time span of each circulation is 1 second, altogether gather 500 data points; The data gathered comprise the total deformation in deformation measurement instrument data, time, load, test;
Step 5 processes data
Under Fatigue Load, the crack tip distortion of peak value and valley change is there is in deformation measurement instrument (8) record with load, the peak value of each circulation and the difference of valley, here take off a circulation start before distortion minimum value, as the resilience of this shaping composite samples (6) this circulation, steady-state deformation phase slope in resilience and time curve is defined as and destroys speed K, when being destroyed by shaping composite samples, Fatigue Load number of times is defined as load cycle index N, reciprocal relation is there is between this destruction speed K and this load cycle index N, destroy speed K less, load cycle index N is larger, anti-' from top to bottom ' cracking performance of bonding layer material is better, load cycle index N is utilized to evaluate anti-' from top to bottom ' cracking performance of bonding layer material with destruction speed K two indices.
2. anti-' from top to bottom ' split test method of bituminous pavement tack coat according to claim 1, it is characterized in that, described shaping composite samples top layer is the second structural sheet (6-4) from bottom to top, second wearing course (6-3), first wearing course (6-2), first structural sheet (6-1), installing deformation measurement instrument (8) on described shaping composite samples surface is concentrate first wearing course (6-2) of the surrounding in hole and the upper installation of the second wearing course (6-3) this deformation measurement instrument (8) multiple around described stress.
3. anti-' from top to bottom ' the split test method of bituminous pavement tack coat according to claim 1, is characterized in that, in step 1, and shaping rear test specimen diameter 150mm, height 110mm.
4. bituminous pavement tack coat according to claim 1 resists the pilot system that ' from top to bottom ' split test method adopts, it is characterized in that, comprise: environmental cabinet (1), MTS loading system and data acquisition system (DAS) composition, this MTS loading system device is in environmental cabinet (1), described MTS loading system loads axle (2) by MTS, MTS pedestal (3), load pacer (4), load fixture (5) composition, wherein, this MTS pedestal (3) is contained in the bottom of environmental cabinet (1), this MTS pedestal (3) is placed with the first loading fixture (5-1), second loading fixture (5-2) is housed below load pacer (4), carry between fixture (5-1) and the second loading fixture (5-1) at the first folder and place shaping composite samples (6), MTS is housed on this load pacer (4) and loads axle (2), described first folder carries fixture (5-1) and has the inner concave arc surface adapted with the bottom surface radian of shaping composite samples (6), described second folder carries fixture (5-2) and has the inner concave arc surface adapted with the end face radian of shaping composite samples (6).
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| CN103698229B (en) * | 2013-12-04 | 2016-04-13 | 长安大学 | Antifatigue shearing performance test device and method of testing thereof between bituminous pavement tack coat |
| CN104615891A (en) * | 2015-02-10 | 2015-05-13 | 长安大学 | Analysis method for bituminous pavement Top-Down crack splitting analytic method |
| CN104713825B (en) * | 2015-03-31 | 2017-08-08 | 山东大学 | The method of testing and device of energy to failure between a kind of asphalt pavement structural layer |
| CN106644727B (en) * | 2017-02-22 | 2023-07-21 | 长沙理工大学 | Device and method for testing rebound modulus of asphalt layer of rigid-flexible composite test piece |
| CN110595914B (en) * | 2019-09-19 | 2022-02-11 | 长沙理工大学 | Method for detecting compaction and shearing characteristics of asphalt mixture in construction compaction process |
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| US4942768A (en) * | 1989-06-06 | 1990-07-24 | Mcrae John L | Paving material testing machine |
| CN102393339A (en) * | 2011-11-24 | 2012-03-28 | 长安大学 | Test method and apparatus for simulating actual pavement cracking through crack |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942768A (en) * | 1989-06-06 | 1990-07-24 | Mcrae John L | Paving material testing machine |
| CN102393339A (en) * | 2011-11-24 | 2012-03-28 | 长安大学 | Test method and apparatus for simulating actual pavement cracking through crack |
Non-Patent Citations (1)
| Title |
|---|
| 沥青混合料Top-down开裂影响因素研究;潘学政等;《建设机械技术与管理》;20121130;109-112 * |
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