CN109596428A - The unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading - Google Patents

The unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading Download PDF

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Publication number
CN109596428A
CN109596428A CN201910076542.XA CN201910076542A CN109596428A CN 109596428 A CN109596428 A CN 109596428A CN 201910076542 A CN201910076542 A CN 201910076542A CN 109596428 A CN109596428 A CN 109596428A
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test
fatigue
loading
asphalt
different loading
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吕松涛
夏诚东
刘超超
樊喜雁
樊现鹏
陈东
郑健龙
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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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
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • 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
    • 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
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • 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
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture
    • 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
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a kind of unified evaluation methods of fatigue performance of asphalt mixture under different loading, by carrying out uniaxial direct tensile, uniaxial compression, cleavage strength and fatigue test under the conditions of different loading speeds to test specimen using multifunctional material test macro (MTS-Landmark), asphalt intensity is established under different loading with loading speed variation model；And it finds than thought asphalt Strength Failure and Fatigue Failures to be unified using speed related stress of the invention, realize the normalization of fatigue performance of asphalt mixture under different loading, the evaluation method can not only improve the laboratory test efficiency of asphalt, save experimentation cost, and theoretical foundation is provided for fatigue performance of asphalt mixture under accurate evaluation different loading, and then provide reference for durable asphalt pavement design.

Description

The unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading
Technical field
The invention belongs to asphalt fatigabilities under technical field of road engineering more particularly to a kind of different loading The unified evaluation method of energy.
Background technique
Fatigue cracking is one of three big Major Diseases of bituminous pavement (fatigue cracking, cold cracking and track).Fatigue is opened It splits mainly as caused by traffic loading repeatedly, and the service performance that may cause bituminous pavement significantly reduces.Pitch The cracking resistance of mixture and the fatigue behaviour of bituminous pavement are directly related.Therefore, for many years, the fatigue behaviour of asphalt Laboratory characterization be always one be worth further investigation project.
Someone using four-point bending fatigue test, the trapezoidal fine strain of millet fatigue test of two o'clock, tri- kinds of overlay tester it is different The fatigue behaviour of common seven kinds of asphalts, finds the fatigue behaviour of seven kinds of asphalts on test method evaluation engineering It is with uniformity in the sequence of three kinds of different fatigue test evaluation methods, but the fatigue behaviour of different tests method cannot phase Mutually conversion；Someone is carried out under multifactor impact by girder bend test, 3 kinds of semicircle bending test, Indirect Tensile Tests methods Asphalt mixture fatigue testing comparative analysis, find under identical conditions, the fatigue life under different force modes is by big Indirect Tensile Tests, girder bend test and semicircle bending test are followed successively by small.
In conclusion the test method of laboratory evaluation fatigue performance of asphalt mixture mainly has uniaxial direct tensile, uniaxial pressure Contracting, four-point bending, splitting, half corner bevelling are drawn, to evaluate the tensile, compressive, bending performance of material, but different tests method obtain it is tired Labor performance difference is larger, it is difficult to be compared, therefore need one kind can unify evaluation different loading under asphalt it is tired The method of labor performance.
Summary of the invention
In view of this, the present invention provides a kind of unified evaluation sides of fatigue performance of asphalt mixture under different loading Method.Evaluation method disclosed by the invention can not only improve the laboratory test efficiency of asphalt, save experimentation cost, and Theoretical foundation is provided for fatigue performance of asphalt mixture under accurate evaluation different loading, and then is set for durable asphalt pavement Meter provides reference.
To achieve the goals above, the invention provides the following technical scheme:
The unified evaluation method of fatigue performance of asphalt mixture, the evaluation method are specifically wrapped under a kind of different loading Include following steps:
(1) strength test of the different loading under different loading speeds is carried out to asphalt；
(2) fatigue test of the different loading under different loading speeds is carried out to asphalt.
1) uniaxial direct tensile intensity, fatigue test method
The mineral aggregate through successively sieving is dried first, and asphalt mixing is added and uniformly obtains asphalt, and according to " public Road engineering pitch and test mixture regulation " (JTG E20-2011) test requirements document, direct tensile test research using vibration The asphalt is rolled into having a size of 400mm × 300mm × 50mm molding test plate (panel) by compacting machine, is then cut to A length of 250 ± 2mm, the beam specimen that width is 50 ± 2mm, a height of 50mm ± 2mm, it is spare.
Then ready test specimen is placed on temperature is that 15 DEG C of insulating boxs keep the temperature 4-5h, then places it in multifunctional material On the strength test support of test macro (MTS-Landmark), and adjusting opens the pressure head of strength test with test specimen initial contact Begin to test, and tests process and completed in insulating box.
Operation program is subsequently worked out by built-in MPT and setting is further applied load and acquisition parameter, test specimen is carried out different Uniaxial direct tensile strength test under loading speed, and each loading speed carries out five effective parallel tests, is averaged Up to the uniaxial direct tensile intensity value under different loading speeds.
Then by the intensity value of obtained different loading speeds, uniaxial direct tensile fatigue test is carried out, it will be in fatigue test It is related that the ratio between the stress level of a certain loading speed intensity value corresponding to loading speed identical in strength test is defined as speed Stress ratio.
Finally by obtained speed related stress ratio, the fatigue equation of asphalt under different loading speeds is established, Asphalt uniaxial direct tensile intensity and Fatigue Failures is set to obtain unification.
2) uniaxial compressive strength, fatigue test method
The mineral aggregate through successively sieving is dried first, and asphalt mixing is added and uniformly obtains asphalt, and according to " public Road engineering pitch and test mixture regulation " (JTG E20-2011) test requirements document, using SGC rotary compactor by the drip It is 100 ± 2mm that height, which is made, in green mixture, and diameter is the cylindrical body bitumen mixture specimen of 100 ± 2mm, after specimen molding Several days of smooth desktop are statically placed in, it is spare.
Then ready test specimen is placed on the insulating box that temperature is 15 DEG C and keeps the temperature 4-5h, then place it in multi-functional material On the strength test support for expecting test macro (MTS-Landmark), and adjust the pressure head and test specimen initial contact for making strength test Start to test, and tests process and completed in insulating box.
Operation program is subsequently worked out by built-in MPT and setting is further applied load and acquisition parameter, test specimen is carried out different Uniaxial compressive strength test under loading speed, and each loading speed carries out five effective parallel tests, is averaged Up to the uniaxial compressive strength value under different loading speeds.
Then by the intensity value of obtained different loading speeds, uniaxial compression fatigue test is carried out, it will be in fatigue test It is related that the ratio between the stress level of a certain loading speed intensity value corresponding to loading speed identical in strength test is defined as speed Stress ratio.
Finally by obtained speed related stress ratio, the fatigue equation of asphalt under different loading speeds is established, Asphalt uniaxial compressive strength and Fatigue Failures is set to obtain unification.
3) cleavage strength, fatigue test method
The mineral aggregate through successively sieving is dried first, and asphalt mixing is added and uniformly obtains asphalt, and according to " public Road engineering pitch and test mixture regulation " (JTG E20-2011) test requirements document, using SGC rotary compactor by the drip It is 100 ± 2mm that height, which is made, in green mixture, and diameter is the cylindrical body bitumen mixture specimen of 100 ± 2mm, after specimen molding Several days of smooth desktop are statically placed in, it is 60 ± 2mm that satisfactory cylindrical body bitumen mixture specimen, which is then cut into height, Diameter is the cylinder test specimen of 100 ± 2mm, spare.
Then ready test specimen is placed on the insulating box that temperature is 15 DEG C and keeps the temperature 4-5h, then place it in multi-functional material On the strength test support for expecting test macro (MTS-Landmark), and adjust the pressure head and test specimen initial contact for making strength test Start to test, and tests process and completed in insulating box.
Operation program is subsequently worked out by built-in MPT and setting is further applied load and acquisition parameter, test specimen is carried out different Cleavage strength test under loading speed, and each loading speed carries out five effective parallel tests, is averaged to obtain the final product Cleavage strength value under different loading speeds.
Then by the intensity value of obtained different loading speeds, splitting fatigue test is carried out, it will be a certain in fatigue test The ratio between the stress level of loading speed intensity value corresponding with loading speed identical in strength test is defined as speed related stress Than.
Finally by obtained speed related stress ratio, the fatigue equation of asphalt under different loading speeds is established, Splitting strength of asphalt mixture and Fatigue Failures is set to obtain unification.
Preferably, the vibratile compacter used testing equipment manufacturer famous using Britain is studied in direct tensile test RCENLD-II air-driven type compacting machine provided by Cooper Research Technology Co., Ltd, is conveniently used for adjusting The parameters such as mode of vibration, compacting height, compaction velocity.
Preferably, the uniaxial compression, diametral compression test equipment are all made of SGC rotary compactor, the SGC rotary compactor Running parameter: Vertical loading pressure be 600kPa ± 18kPa, compacting revolving speed be 30r/min ± 0.5r/min, effectively in rotate Angle is 1.16 ± 0.02 °.It has the function of to automatically determine the recording and displaying of height of specimen, number of revolutions and respective heights.
Preferably, the size of the direct tensile test test specimen: a length of 250 ± 2mm, width be 50 ± 2mm, a height of 50mm ± 2mm；The size of the uniaxial compression test cylinder specimen: being highly 100 ± 2mm, and diameter is 100 ± 2mm；The splitting examination It tests the size of cylinder specimen: being highly 60 ± 2mm, diameter is 100 ± 2mm.
Preferably, in strength test, the power of each loading cycle is measured automatically by data collection system, displacement deformation is by position Displacement sensor measures.
Preferably, the strength test in the step 3 is direct tensile test, diametral compression test or uniaxial compression test.
Preferably, the loading speed of the uniaxial direct tensile strength test and cleavage strength test are as follows: 5MPa/s, 10MPa/s, 20MPa/s,30MPa/s,40MPa/s,50MPa/s,60MPa/s,70MPa/s；The load speed of the uniaxial compressive strength test Rate are as follows: 0.02MPa/s, 0.05MPa/s, 0.1MPa/s, 0.5MPa/s, 1MPa/s, 2MPa/s.
Preferably, in fatigue test, the reduction formula of loading frequency and loading speed are as follows:
Wherein, v is the loading speed of fatigue test, and σ is the stress level of fatigue test, and T is the period of fatigue test, f For the loading frequency of fatigue test.
Preferably, for Stress Control mode, test temperature is the control model that the strength test of different loading uses 15℃。
Preferably, for Stress Control mode, Loaded contact analysis is the control model that the fatigue test of different loading uses Half-sine wave, and test frequency is 10Hz, test temperature is 15 DEG C.
Through the above technical solutions, technical effect of the invention: the present invention provides pitches under a kind of different loading The unified evaluation method of fatigue properties of asphalt mixture, by using multifunctional material test macro (MTS-Landmark) to test specimen into Uniaxial direct tensile, uniaxial compression, cleavage strength test under the conditions of the different loading speeds of row, establish pitch under different loading Mixture intensity is with loading speed variation model；And it finds than thought pitch to be mixed using speed related stress of the invention Material Strength Failure and Fatigue Failures are unified, and returning for fatigue performance of asphalt mixture under different loading is realized One changes, which can not only improve the laboratory test efficiency of asphalt, save experimentation cost, and accurately to comment Fatigue performance of asphalt mixture provides theoretical foundation under valence different loading, and then provides ginseng for durable asphalt pavement design It examines.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is asphalt uniaxial direct tensile intensity with loading speed change curve；
Fig. 2 compares change curve with speed related stress for uniaxial direct tensile fatigue life；
Fig. 3 is asphalt uniaxial compressive strength with loading speed change curve；
Fig. 4 compares change curve with speed related stress for uniaxial compression fatigue life；
Fig. 5 is splitting strength of asphalt mixture with loading speed change curve；
Fig. 6 compares change curve with speed related stress for the splitting fatigue service life；
Fig. 7 is fatigue performance of asphalt mixture Unified Expression model under different loading.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of unified evaluation method of fatigue performance of asphalt mixture under different loading, This method can not only improve the laboratory test efficiency of asphalt, save experimentation cost, and add for accurate evaluation difference Fatigue performance of asphalt mixture provides theoretical foundation under load mode, and then provides reference for durable asphalt pavement design.
Embodiment
1) uniaxial direct tensile intensity, fatigue test method
By the mineral aggregate drying through successively sieving, and asphalt mixing is added and uniformly obtains asphalt, and according to " highway work Journey pitch and test mixture regulation " (JTG E20-2011) test requirements document, direct tensile test studies vibrating compacting used Machine is using provided by famous testing equipment manufacturer Cooper Research Technology Co., Ltd, Britain RCENLD-II air-driven type compacting machine is conveniently used for the parameters such as adjustment mode of vibration, compacting height, compaction velocity.Roller-compaction examination The size of plate is 400mm × 300mm × 50mm, is then cut to long 250 ± 2mm, wide 50 ± 2mm, high 50mm ± 2mm's Beam specimen is used for uniaxial direct tensile strength test, spare.
Ready test specimen is placed on the insulating box that temperature is 15 DEG C and keeps the temperature 4-5h, is then placed on multifunctional material survey On the strength test support of test system (MTS-Landmark), and adjusting starts the pressure head of strength test with test specimen initial contact Test, and test process and completed in insulating box.
Operation program is worked out by built-in MPT and setting is further applied load and acquisition parameter, and test specimen is subjected to different loads speed Uniaxial direct tensile strength test under rate, and each loading speed carries out five effective parallel tests, is averaged up to different Uniaxial direct tensile intensity value under loading speed.
By the uniaxial direct tensile intensity value being fitted under different loading speeds, matched curve such as attached drawing 1, shown fitting side can be obtained Journey are as follows:
RD=2.15852v0.21307, R2=0.952
Wherein, RDFor uniaxial direct tensile intensity value；V is the loading speed of strength test；R2For the related coefficient of equation.
It is directly drawn according to the test requirements document of " highway engineering pitch and test mixture regulation " (JTG E20-2011) Fatigue test is stretched, behind the testing site for rejecting the substantial deviation curve of fatigue, asphalt uniaxial direct tensile is tired under different loading speeds Labor test result matched curve is as shown in Fig. 2, fit equation are as follows:
Nf=tv -5.14, R2=0.982
Wherein, NfFor fatigue life；tvFor the loading speed of strength test；R2For the related coefficient of equation.
2) uniaxial compressive strength, fatigue test method
By the mineral aggregate drying through successively sieving, and asphalt mixing is added and uniformly obtains asphalt, and according to " highway work Journey pitch and test mixture regulation " (JTG E20-2011) test requirements document, uniaxial compression test use SGC rotary compactor Formed, can straight forming sample dimensions be height 100 ± 2mm, diameter be 100 ± 2mm cylindrical body asphalt try Part is statically placed in several days of smooth desktop after specimen molding, spare.
The insulating box that ready test specimen is placed on 15 DEG C is kept the temperature into 4-5h, is then placed on multifunctional material test macro (MTS-Landmark) on strength test support, and adjusting makes the pressure head of strength test start to test with test specimen initial contact, And test process is completed in insulating box.
Operation program is worked out by built-in MPT and setting is further applied load and acquisition parameter, and test specimen is subjected to different loads speed Uniaxial compressive strength is tested under rate, and each loading speed carries out five effective parallel tests, is averaged up to different Uniaxial compressive strength value under loading speed.
By the compression strength values being fitted under different loading speeds, it is as shown in Fig. 3 to obtain matched curve, fit equation Are as follows:
RC=9.81584v0.22107, R2=0.992
Wherein, NfFor fatigue life；tvFor the loading speed of strength test；R2For the related coefficient of equation.
It is directly drawn according to the test requirements document of " highway engineering pitch and test mixture regulation " (JTG E20-2011) Fatigue test is stretched, behind the testing site for rejecting the substantial deviation curve of fatigue, asphalt uniaxial compression is tired under different loading speeds Labor test result matched curve is as shown in Fig. 4, fit equation are as follows:
Nf=tv -5.51, R2=0.997
Wherein, NfFor fatigue life；tvFor the loading speed of strength test；R2For the related coefficient of equation.
3) cleavage strength, fatigue test method
By the mineral aggregate drying through successively sieving, and asphalt mixing is added and uniformly obtains asphalt, and according to " highway work Journey pitch and test mixture regulation " (JTG E20-2011) test requirements document, uniaxial compression test use SGC rotary compactor It is formed, for shaping test piece having a size of 100 ± 2mm of height, diameter is the cylindrical body bitumen mixture specimen of 100 ± 2mm, test specimen It is statically placed in several days of smooth desktop after molding, satisfactory cylindrical body bitumen mixture specimen is cut into 60 ± 2mm of height, Diameter is the cylinder test specimen of 100 ± 2mm, spare.
The insulating box that ready test specimen is placed on 15 DEG C is kept the temperature into 4-5h, is then placed on multifunctional material test macro (MTS-Landmark) on strength test support, and adjusting makes the pressure head of strength test start to test with test specimen initial contact, And test process is completed in insulating box.
Operation program is worked out by built-in MPT and setting is further applied load and acquisition parameter, and test specimen is subjected to different loads speed Cleavage strength is tested under rate, and each loading speed carries out five effective parallel tests, is averaged up to different loads Cleavage strength value under rate.
By the cleavage strength value being fitted under different loading speeds, it is as shown in Fig. 5 to obtain matched curve, fit equation Are as follows:
RT=2.24289v0.22571, R2=0.957
Wherein, RTFor uniaxial direct tensile intensity value；V is the loading speed of strength test；R2For the related coefficient of equation.
It is directly drawn according to the test requirements document of " highway engineering pitch and test mixture regulation " (JTG E20-2011) Fatigue test is stretched, behind the testing site for rejecting the substantial deviation curve of fatigue, asphalt uniaxial compression is tired under different loading speeds Labor test result matched curve is as shown in Fig. 6, fit equation are as follows:
Nf=tv -5.48, R2=0.995
Wherein, NfFor fatigue life；tvFor the loading speed of strength test；R2For the related coefficient of equation.
4) fatigue equation according to different loading under different loading speeds, the fatigue life being fitted and speed Related stress summarizes than relationship matched curve parameter, as shown in table 1:
Asphalt fatigue life and speed related stress are than relationship matched curve parameter under 1 different loading of table
From table 1 it can be seen that the material of the S-N fatigue equation under different loading based on speed related stress than thought Material parameter k value be equal to 1, that is to say, that when the speed related stress ratio in fatigue test be equal to 1 when, asphalt it is tired The labor service life is 1, therefore makes Strength Failure and tired than the forecasting fatigue model of the asphalt of thought based on speed related stress Labor Problem of Failure is unified, and the deficiency of traditional S-N Tiredness model is compensated for.
In addition, from table 1 it can be seen that S-N fatigue equation under different loading based on speed related stress than thought Material parameter n value be not much different, therefore the fatigue behaviour of the asphalt under different loading is normalized, different The matched curve of fatigue behaviour is as shown in Fig. 7 under loading mode, and evaluation method disclosed by the invention can not only improve pitch The laboratory test efficiency of mixture saves experimentation cost, and is asphalt fatigue under accurate evaluation different loading Performance provides theoretical foundation, and then provides reference for durable asphalt pavement design.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (8)

1. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading, which is characterized in that the evaluation Method specifically comprises the following steps:
Step 1: the mineral aggregate through successively sieving is dried, and asphalt mixing is added and uniformly obtains asphalt, and according to " public Road engineering pitch and test mixture regulation " (JTG E20-2011) test requirements document, the asphalt is respectively prepared It is spare applied to the test specimen of direct tensile test, uniaxial compression test and diametral compression test；
Step 2: the ready test specimen of step 1 is placed in the insulating box that temperature is 15 DEG C and keeps the temperature 4-5h, is then placed on more function On the strength test support of energy material testing system (MTS-Landmark), and adjusting keeps the pressure head of strength test and test specimen preliminary Contact start test, and strength test process is completed in insulating box；
Step 3: operation program is worked out by built-in MPT and setting is further applied load and acquisition parameter, test specimen is subjected to different loads Strength test of the mode under different loading speeds, and each loading speed carries out five effective parallel tests, is averaged It is worth up to intensity value of the different loading under different loading speeds；
Step 4: intensity value of the different loading obtained according to step 3 under different loading speeds carries out fatigue test, And by the ratio between the stress level of loading speed a certain in fatigue test intensity value corresponding with loading speed identical in strength test It is defined as speed related stress ratio.
Step 5: the speed related stress ratio obtained based on step 4 establishes the fatigue of asphalt under different loading Equation, and the system of fatigue performance of asphalt mixture under different loading is obtained than thought using speed related stress of the invention One evaluation method makes asphalt intensity and Fatigue Failures obtain unification.
2. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 1, It is characterized in that, RCENLD-II air-driven type compacting machine is selected in the preparation of the direct tensile test test specimen；The uniaxial compression examination Test, the preparation of diametral compression test test specimen is all made of SGC rotary compactor, and the running parameter of the SGC rotary compactor: it is vertical plus Load pressure is 600kPa ± 18kPa, and compacting revolving speed is 30r/min ± 0.5r/min, and effective internal rotation angle is 1.16 ± 0.02 °.
3. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 2, It is characterized in that, the size of the direct tensile test test specimen: a length of 250 ± 2mm, width are 50 ± 2mm, a height of 50mm ± 2mm Beam specimen；The uniaxial compression test sample dimensions: being highly 100 ± 2mm, the cylindrical examination that diameter is 100 ± 2mm Part；The diametral compression test sample dimensions: being highly 60 ± 2mm, and diameter is the cylinder specimen of 100 ± 2mm.
4. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 1, It is characterized in that, the power of each loading cycle is measured automatically by data collection system, displacement deformation is by being displaced in the step 3 Sensor measures.
5. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 4, It is characterized in that, the strength test in the step 3 is direct tensile test, diametral compression test or uniaxial compression test.
6. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 5, It is characterized in that, the loading speed of the uniaxial direct tensile strength test and cleavage strength test is equal are as follows: 5MPa/s, 10MPa/s, 20MPa/s,30MPa/s,40MPa/s,50MPa/s,60MPa/s,70MPa/s；The loading speed of uniaxial compressive strength test are as follows: 0.02MPa/s、0.05MPa/s、0.1MPa/s、0.5MPa/s、1MPa/s、2MPa/s。
7. the unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading according to claim 1, It is characterized in that, in the fatigue test of the step 4, the reduction formula of loading frequency and loading speed are as follows:
Wherein, v is the loading speed of fatigue test, and σ is the stress level of fatigue test, and T is the period of fatigue test, and f is tired The loading frequency of labor test.
8. fatigue performance of asphalt mixture is uniformly commented under a kind of any different loading according to claim 1~7 Valence method, which is characterized in that in the strength test of the step 3, use control model for Stress Control mode, test temperature It is 15 DEG C；And in the fatigue test of the step 4, use control model for Stress Control mode, Loaded contact analysis is semisinusoidal Wave, test frequency 10Hz, test temperature are 15 DEG C.
CN201910076542.XA 2019-01-26 2019-01-26 The unified evaluation method of fatigue performance of asphalt mixture under a kind of different loading Pending CN109596428A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110018049A (en) * 2019-04-24 2019-07-16 长沙理工大学 A kind of asphalt Fatigue Life Prediction method under Simple stress condition
CN113834742A (en) * 2021-10-25 2021-12-24 北京建筑大学 Method for determining open traffic strength of polyurethane concrete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101592652A (en) * 2008-07-04 2009-12-02 重庆交通大学 Prediction method of fatigue lifetime of asphalt pavement in sticky areas
CN108956286A (en) * 2018-05-03 2018-12-07 长沙理工大学 The method for normalizing of asphalt fatigue properties under a kind of different stress

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101592652A (en) * 2008-07-04 2009-12-02 重庆交通大学 Prediction method of fatigue lifetime of asphalt pavement in sticky areas
CN108956286A (en) * 2018-05-03 2018-12-07 长沙理工大学 The method for normalizing of asphalt fatigue properties under a kind of different stress

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吕松涛: "考虑加载速度影响的沥青混合料疲劳方程", 《工程力学》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110018049A (en) * 2019-04-24 2019-07-16 长沙理工大学 A kind of asphalt Fatigue Life Prediction method under Simple stress condition
CN113834742A (en) * 2021-10-25 2021-12-24 北京建筑大学 Method for determining open traffic strength of polyurethane concrete
CN113834742B (en) * 2021-10-25 2023-07-21 北京建筑大学 Method for determining open traffic intensity of polyurethane concrete

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