CN107607471A - The aqueous oilstone interface consolidation strength test method of bituminous paving - Google Patents
The aqueous oilstone interface consolidation strength test method of bituminous paving Download PDFInfo
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- CN107607471A CN107607471A CN201711007668.9A CN201711007668A CN107607471A CN 107607471 A CN107607471 A CN 107607471A CN 201711007668 A CN201711007668 A CN 201711007668A CN 107607471 A CN107607471 A CN 107607471A
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Abstract
The invention discloses a kind of aqueous oilstone interface consolidation strength test method of bituminous paving, including preparation before experiment, the preliminary preparation of test specimen, the preparation of different soaking time test specimens, the measure of shear fails intensity of test specimen and the simulation of supporting test specimen water oilstone interface moisture content calculate totally five steps.Specific experiment process includes carrying out indoor shearing test to the test specimen with different soaking times using shearing test apparatus, and carrying out numerical simulation by the mass diffusion modules of program-ABAQUS obtains the matched curve of soaking time and interface water content.Oilstone interface moisture content and the fit correlation of shear strength are drawn eventually through data processing.Compared with prior art, the beneficial effects of the invention are as follows：The research method being combined by numerical simulation with laboratory test, the relation of oilstone interface moisture content and contact surface general shear intensity is determined, effectively improves past empirical method, it is ensured that the more accurate science of test data.
Description
Technical field
The invention belongs to traffic brick or concrete duct field, more particularly to a kind of aqueous oilstone interface consolidation strength examination of bituminous paving
Proved recipe method.
Background technology
Along with asphaltic road-mix surface course structure while the extensive use of high-grade highway field, its durability and road surface
The early damage problem of structure becomes increasingly conspicuous.The investigation result of road pavement disease is shown at present, is occurred in low temperature severe cold area
Major Diseases type is cold cracking, is secondly Moisture Damage, is become in the Major Diseases type that high temperature hot area occurs for high temperature
Shape, it is secondly Moisture Damage, it is seen that whether how different region, weather conditions are, and Moisture Damage is all the main Types of pavement destruction,
Moisture Damage is usually associated with other Damage Types and occurs jointly, be joint development, continuous worsening in whole failure stage.
Moisture Damage, in particular to asphalt are in making after compacting, and compound is in use due to rainwater etc.
The water of form is entered inside road surface by mixture gap, in the presence of reloading, original static existing moisture content by
Driving pressure and produce moisture content impact, so as to constantly being washed away to compound, after repeatedly circulation, bituminous cements glues
Degree constantly reduces, and is weakened with aggregate adhesion, it can be seen from asphalt intensity forms theory, composition compound intensity
Two parts decline, and so as to cause road surface overall construction intensity to reduce, compound gathers materials the phenomenon separated occurs with pitch, then
Segregation phenomenon, which grows in intensity, will cause the form of the disease such as compound generation frost boiling, purt mud, loose.Present research is mainly recognized
Reduction for rubber cement adhesion strength and oilstone interfacial adhesion intensity is the main reason for Moisture Damage produces, and wherein rubber cement itself is viscous
Knotting strength and rubber cement and the adhesion strength between gathering materials are referred to as oilstone interface consolidation strength.Moisture is expanded by asphalt membrane or rubber cement film
To be scattered to up to oilstone interface can cause the stripping of asphalt membrane, moreover, moisture increases the stream that can have a strong impact on rubber cement in rubber cement
Change and engineering characteristic.At present, do not explained that empirical method is currently used for grinding well also for the mechanism of production of Moisture Damage
Study carefully the universal and effective method of these phenomenons.
Mechanical property of the adhesive property and its adhesion property to building stones of pitch and rubber cement material itself to compound
Necessarily have a major impact, diffusion of the moisture content in rubber cement first can soft pitch, make the adhesive aggregation degradation of pitch and rubber cement, such as
Can have a negative impact again to the adhesion strength of rubber cement-aggregate when the moisture content at fruit oilstone interface is larger.At present to oilstone interface
The correlative study of consolidation strength have accumulated must achievement, wherein to interface consolidation quantitative test technique be research interface
Consolidation effect and the basis for determining improving countermeasure, and for there is the correlative study of water termination less, especially quantitative interfacial water
More ripe test method and result of the test are not yet found with the relation of oilstone interface consolidation strength.For Research on Asphalt Mixture
Influence containing water termination to oilstone interface consolidation strength, it is necessary to develop one kind and can test and oiled stone consolidation strength containing water termination
Test method, and it is material modified to research and develop under this test method different bituminous paving water damages.
The content of the invention
It is an object of the present invention to for above mentioned problem present in existing oilstone interface consolidation strength experimental method, carry
For a kind of test method for testing the aqueous oilstone interface consolidation strength of bituminous paving.
To achieve these goals, the technical scheme that the application uses for：A kind of aqueous oilstone interface consolidation of bituminous paving
Method for testing performance, comprise the following steps that：
Preparation before S1, experiment：Tensioning member and pedestal are placed in baking oven and preheated, the tensioning member and pedestal are rectangular
Body structure, it is in flow regime that pitch, which is placed in baking oven, and is heated to pitch；
S2, test specimen preliminary preparation：Base-plates surface smears pitch and forms rectangular bonding course, and stretching is bonded on bonding course
Part, tensioning member and pedestal connect composition test specimen, the consolidation area S of survey calculation bonding course by bonding courset；
S3, different soaking times test specimen preparation：The test specimen prepared in S2 and supporting test specimen are placed in and preset
In the auxiliary device of temperature, the supporting test specimen includes pedestal, pitch bonding course and tensioning member, the pedestal of the test specimen and matches somebody with somebody
The pedestal for covering test specimen is immersed in the distilled water of auxiliary device, and the immersion height of pedestal is less than the whole height of pedestal, changes pedestal
Soaking time, prepare the test specimen sample with different soaking times and the supporting test specimen sample with different soaking times；
S4, test specimen shear fails intensity measure：The test specimen sample with different soaking times prepared in S3 is stood
It is placed in the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving for presetting temperature and carries out shearing test, record
The shear fails load F of each test specimen, the consolidation area S obtained according to S2tThe shear fails intensity of each test specimen is calculated
Rt；
S5, supporting test specimen water oilstone interface moisture content simulation calculate：Using ABAQUS mass diffusion modules,
And the moisture diffusion coefficients D in mass diffusion modules is set according to the material of the supporting test specimen prepared in S3rockNumber
Value, it is specified that the moisture concentration in all faces of water-immersed supporting test specimen is 1, simulation calculate supporting test specimen soaking time with it is supporting
Relation between the water oilstone interface moisture content of test specimen, and the shear fails for combining the test specimen for obtaining different soaking times in S4 are strong
Spend Rt, obtain the water oilstone interface moisture content of test specimen and the shear fails intensity R of test specimentBetween relation.
Further, the tensioning member in the S1 and pedestal are placed in preheating 5-20min, the drawing in 80-120 DEG C of baking oven
The size for stretching part and pedestal is 40*40*10mm cuboid stone, and the pitch in the S1 is traditional asphalt, modified pitch
Or one kind in asphalt mastic, the supporting test specimen in the S3 are identical with the test specimen prepared in S2.
Further, the auxiliary device in the S3 is miniature constant temperature water bath, the inner side of the miniature constant temperature water bath
The bottom of wall is provided with temperature sensor, and control dial plate is provided with the lateral wall of the miniature constant temperature water bath, described small-sized
The bottom of the lateral wall of constant water bath box is provided with the temp-controlling element extended in miniature constant temperature water bath, the temp-controlling element water
Flat to be arranged in miniature constant temperature water bath, the temp-controlling element is U-shaped immersion type heating element, temperature sensor and the temperature control member
Part is connected by data line with outside control dial plate.
Further, the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving in the S4 includes base and control
Temperature test box；
The base includes the first plate and cuboid cavity, and first plate directly contacts with ground, and the cuboid is empty
Chamber is mutually perpendicular to the first plate and integral type is connected, and second plate parallel with the first plate is provided with the cuboid cavity,
Cuboid cavity is divided into upper and lower two parts by second plate, and the lower part of the cuboid cavity is provided with compressor, described
The upper part of cuboid cavity is provided with motor, and the top integral type of the base is provided with temperature control chamber, the compression
The blast pipe of machine is connected with the air inlet of temperature control chamber, and the compressor is used for realizing the control for testing temperature control the temperature inside the box
System, the motor are connected by data line with external computer；
Top inside the temperature control chamber is fixedly installed entablature, in the bottom inside the temperature control chamber
Heart position is fixedly installed lower jaw, and the both ends of the entablature are respectively connected with a screw mandrel, and the screw mandrel tries with temperature control
The bottom of tryoff is vertical, and the screw mandrel is flexibly connected with the bottom inside temperature control chamber, is flexibly connected on two screw mandrels
There is a sill, the sill is parallel with entablature and the axis of the vertical direction of sill and temperature control chamber are vertical
The axis in direction is overlapped, and upper jaw, the bottom difference of two screw mandrels are connected with by be hinged chain bar on the sill
Connected by the output end of shaft coupling and motor, shear force sensor, the shearing force sensing are provided with the sill
Device is connected by data line with external computer.
Further, the axis of the upper jaw vertical direction is mutually staggered with the axis of lower jaw vertical direction,
And the upper jaw is fixed on sill by be hinged chain bar, and the motor drives screw mandrel to rotate, and the screw mandrel drives
Sill moves up or down along screw mandrel.
Further, when test temperature requirement is more than 0 DEG C, the water in miniature constant temperature water bath and temperature control are tested first
Case is controlled in required temperature, and then test specimen is put into miniature constant temperature water bath and cultivated, after culture, is rapidly put into test specimen
Temperature control chamber, shearing test is carried out at once after stablizing 3-8min；
When test temperature is less than 0 DEG C, the water management in miniature constant temperature water bath is tested temperature control at 4-6 DEG C first
Then test specimen is put into miniature constant temperature water bath and cultivated, after culture, take in the temperature of test requirements document by the temperature control of case
Going out test specimen preservative film winding parcel, be immediately placed in temperature control chamber, temperature control causes the temperature of test specimen to reach the temperature of experiment,
Preservative film is finally removed, shearing test is carried out after stable 3-8min.
Further, the consolidation area S in the S2tMeet St=a × b × 3/4, wherein a are the length of tensioning member or pedestal
Degree, b are the width of tensioning member or pedestal, and a and b size is shear fails load F, consolidation in the S4 for 40mm
Area StAnd shear fails intensity RtBetween relation meet Rt×St=F.
Further, the simulation of the interface moisture content in the S5, which calculates, meets following condition：
WhereinRepresent interface moisture content, CmFor moisture concentration,For the concentration limit value of test specimen moisture carrying.
Compared with prior art, the beneficial effects of the invention are as follows：Pass through the numerical simulation and laboratory test phase of designed, designed
With reference to research method, can determine water oilstone interface moisture content and test specimen water oilstone interface shear strength between pass
System.Test specimen is immersed in the water of certain temperature, it is ensured that water oilstone interface reaches certain moisture content；When being soaked by changing
Between, and the test for immediately carrying out shear strength was immersed after the time as defined in reach, quantitative study soaking time is to test specimen
The influence of water oilstone interface shear strength.Water can ensure the production of consolidation failure from the bottom percolation of pedestal to water oilstone interface
It is raw, and the moisture diffusion coefficients D in the mass diffusion modules setting rock material for passing through ABAQUSrock, can be very
The changing rule of the soaking time of test specimen and the water oilstone interface moisture content of test specimen, this numerical simulation and indoor examination are obtained well
Test the method being combined and effectively improve past empirical method, it is ensured that the more accurate science of test data.
Brief description of the drawings
Fig. 1 is the flow chart of the aqueous oilstone interface consolidation strength test method of bituminous paving of the present invention；
Fig. 2 is the aqueous oilstone interface consolidation strength shearing test apparatus structural representation of specific embodiment of the invention bituminous paving
Figure；
Fig. 3 is the structural representation of auxiliary device；
Fig. 4 is the general shear intensity and soaking time graph of relation of the specific embodiment of the invention
Fig. 5 is the change of moisture content after the test specimen immersion 4h of the specific embodiment of the invention；
Fig. 6 is the surface of test piece water content of the specific embodiment of the invention with soaking time variation relation matched curve figure；
Fig. 7 be when binding material is matrix pitch in the specific embodiment of the invention general shear intensity of the test specimen at 10 DEG C with
Interface moisture content relation fitting；
Description of reference numerals：1st, entablature；2nd, sill；3rd, it is hinged chain bar；4th, upper jaw；5th, screw mandrel；6th, lower jaw；7、
Motor；8th, base；8-1, the first plate；The plates of 8-2 second；8-3, cuboid cavity；9th, data line；10th, temperature control chamber；
11st, compressor；12nd, temperature sensor；13rd, temp-controlling element；14th, miniature constant temperature water bath；15th, control dial plate.
Embodiment
In order that the technological means of the present invention, creation characteristic, achieve the goal is easy to understand with effect, below in conjunction with
Accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
As shown in figure 1, the embodiment of the present invention is achieved using following technical scheme, bituminous paving is aqueous
Oilstone interface consolidates method for testing performance, comprises the following steps that：
Preparation before S1, experiment：Tensioning member and pedestal are placed in baking oven 15min are preheated at 100 DEG C, the tensioning member and
Pedestal is rectangular parallelepiped structure, and it is in flow regime that pitch, which is placed in 135 DEG C of baking oven, and is heated to pitch；
S2, test specimen preliminary preparation：Base-plates surface smears pitch and forms rectangular bonding course, and stretching is bonded on bonding course
Part, tensioning member and pedestal connect composition test specimen, the consolidation area S of survey calculation bonding course by bonding courset；
S3, different soaking times test specimen preparation：The test specimen prepared in S2 and supporting test specimen are placed in and preset
In the auxiliary device of temperature, the supporting test specimen includes pedestal, pitch bonding course and tensioning member, the pedestal of the test specimen and matches somebody with somebody
The pedestal for covering test specimen is immersed in the distilled water of auxiliary device, and the immersion height of pedestal is less than the whole height of pedestal, changes pedestal
Soaking time, prepare the test specimen sample with different soaking times and the supporting test specimen sample with different soaking times；
S4, test specimen shear fails intensity measure：The test specimen sample with different soaking times prepared in S3 is stood
It is placed in the temperature control chamber for the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving for presetting temperature and carries out
Shearing test, record the shear fails load F of each test specimen, the consolidation area S obtained according to S2tEach test specimen is calculated
Shear fails intensity Rt；
S5, supporting test specimen water oilstone interface moisture content simulation calculate：Using ABAQUS mass diffusion modules,
And the moisture diffusion coefficients D in mass diffusion modules is set according to the material of the supporting test specimen prepared in S3rockNumber
Value, it is specified that the moisture concentration in all faces of water-immersed supporting test specimen is 1, simulation calculate supporting test specimen soaking time with it is supporting
Relation between the water oilstone interface moisture content of test specimen, and the shear fails for combining the test specimen for obtaining different soaking times in S4 are strong
Spend Rt, obtain the water oilstone interface moisture content of test specimen and the shear fails intensity R of test specimentBetween relation.
As the preferred scheme of the present invention, tensioning member and pedestal in S1 are placed in preheating 5- in 80-120 DEG C of baking oven
20min, the size of the tensioning member and pedestal are 40*40*10mm cuboid stone, and the pitch in the S1 drips for tradition
One kind in blue or green, modified pitch or asphalt mastic, the supporting test specimen in the S3 are identical with the test specimen prepared in S2.
As the preferred scheme of the present invention, the auxiliary device in S3 is miniature constant temperature water bath 14, miniature constant temperature water-bath
The bottom of the madial wall of case 14 is provided with temperature sensor 12, and control dial plate is provided with the lateral wall of miniature constant temperature water bath 14
15, the bottom of the lateral wall of miniature constant temperature water bath 14 is provided with the temp-controlling element 13 extended in miniature constant temperature water bath 14,
Temp-controlling element 13 is horizontally set in miniature constant temperature water bath 14, and temp-controlling element 13 is U-shaped immersion type heating element, temperature sensor
12 and temp-controlling element 13 be connected by data line with outside control dial plate, can be realized by control dial plate 15 to small-sized
The temperature control of constant water bath box 14, reach the purpose of test specimen immersion health at different temperatures.Temp-controlling element 13 is realized to small
The heating of water in type constant water bath box 14.When using the auxiliary device, user is set required by control dial plate 15 first
Temperature, then it is powered to auxiliary device, the water in miniature constant temperature water bath 14 is heated by temp-controlling element 13, while temperature
The temperature of water is passed to control dial plate 15 by degree sensor 12 in real time, when temperature sensor 12 detects that the temperature of water reaches control
During originally temperature that tabulation disk 15 is set, control dial plate 15 will control temp-controlling element 13 to stop the heating to water.Work as TEMP
When device 12 detects the temperature of water less than originally temperature that control dial plate 15 is set, control dial plate 15 will control temp-controlling element 13 after
It is continuous that water is heated.
As another preferred scheme of the present invention, the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving in S4
Including base 8 and temperature control chamber 10；
Base 8 includes the first plate 8-1 and cuboid cavity 8-3, and the first plate 8-1 directly contacts with ground, cuboid cavity
8-3 is mutually perpendicular to the first plate 8-1 and integral type is connected, and parallel with the first plate 8-1 is provided with cuboid cavity 8-3
8-3 points by cuboid cavity of two plate 8-2, the second plate 8-2 are upper and lower two parts, and cuboid cavity 8-3 lower part is provided with pressure
Contracting machine 11, cuboid cavity 8-3 upper part are provided with motor 7, and the top integral type of base 8 is provided with temperature control chamber
10, the blast pipe of compressor 11 is connected with the air inlet of temperature control chamber 10, and compressor 11 is used for realizing to temperature control chamber 10
The control of interior temperature, motor 7 are connected by data line 9 with external computer；
Top inside temperature control chamber 10 is fixedly installed entablature 1, the center of the bottom inside temperature control chamber 10
Position is fixedly installed lower jaw 6, and the both ends of entablature 1 are respectively connected with a screw mandrel 5, screw mandrel 5 and temperature control chamber 10
Bottom it is vertical, screw mandrel 5 is flexibly connected with the bottom inside temperature control chamber 10, is connected with two screw mandrels 5 under one
Crossbeam 2, sill 2 is parallel with entablature 1 and the axis of the vertical direction of sill 2 and the vertical direction of temperature control chamber 10
Axis overlaps, and is connected with upper jaw 4 by be hinged chain bar 3 on sill 2, the bottom of two screw mandrels 5 passes through shaft coupling respectively
It is connected with the output end of motor 7, shear force sensor is provided with sill 2, shear force sensor passes through data line 9
It is connected with external computer.
As the preferred scheme of the present invention, the axis of the vertical direction of upper jaw 4 and the axis of the vertical direction of lower jaw 6
Line mutually staggers, and upper jaw 4 is fixed on sill 2 by be hinged chain bar 3, stress when thereby may be ensured that test specimen tension
The stability in direction, influence of the moment of flexure to experimental result can be cut down, it is ensured that laboratory sample is only by the effect sheared, motor 7
Screw mandrel 5 is driven to rotate, screw mandrel 5 drives sill 2 to be moved up or down along screw mandrel 5.
As another preferred scheme of the present invention, when test temperature requirement is more than 0 DEG C, first by miniature constant temperature water bath
Water and temperature control chamber 10 in 14 are controlled in required temperature, and then test specimen is put into miniature constant temperature water bath 14 and cultivated, training
After supporting, test specimen is put into temperature control chamber 10 rapidly, shearing test is carried out at once after stable 3-8min；
When test temperature is less than 0 DEG C, the water management in miniature constant temperature water bath 14 is tried temperature control at 4-6 DEG C first
Then test specimen is put into miniature constant temperature water bath 14 and cultivated, cultivated in the temperature of test requirements document by the temperature control of tryoff 10
Bi Hou, take out test specimen and wind parcel with preservative film, be immediately placed in temperature control chamber 10, temperature control causes the temperature of test specimen to reach real
The temperature tested, preservative film is finally removed, shearing test is carried out after stable 3-8min.
As another preferred scheme of the present invention, the consolidation area S in S2tMeet St=a × b × 3/4, wherein a are stretching
The length of part or pedestal, b are the width of tensioning member or pedestal, and a and b size is for 40mm, and the shearing in the S4 is lost
Imitate load F, consolidation area StAnd shear fails intensity RtBetween relation meet Rt×St=F.
As another preferred scheme of the present invention, the simulation of the interface moisture content in S5, which calculates, meets following condition：
WhereinRepresent interface moisture content, CmFor moisture concentration,For the concentration limit value of test specimen moisture carrying.
The shear strength at aqueous oilstone interface and the mathematical relationship of soaking time are obtained in the present invention by above-mentioned experiment, is led to
The relation that numerical simulation draws oilstone interface moisture content and soaking time is crossed, finally determines that the general shear at aqueous oilstone interface is strong
The fit correlation of degree and moisture content.
The simulation of the present invention of interface water content in to(for) S5 calculates, using ABAQUS mass diffusion moulds
Block.Abaqus/Standard is provided for calculating transient state and the steady-state model that a kind of material spreads to another material, such as
Hydrone calculates the extension form using Fick's law to the diffusion process of stone test specimen, non-homogeneous molten for calculating
Diffusion of the Xie Du material in basic material.
1) governing equation
The mass conservation law of diffusion phase is obeyed in the calculating of diffusion problem：
In formula, V is arbitrary volume, and S is V surface, and n is the outside method phases of face S, and J is the diffusion flux of diffusion phase.
2) constitutive relation
Diffusion is assumed to be driven by chemical potential gradient, provides basic constitutive relation
In formula, D (c, θ, f) is diffusion coefficient；S (θ, f) is solubility；ks(c, θ, f) is the soret effect factor, with temperature
The relevant influence of gradient is spent to spread；θ is temperature；θzFor absolute zero；kp(c, θ, f) is the compression factor, with equivalent compression gradient
It is relevant to influence diffusion.
Embodiment one
Preparation before S1, experiment：Tensioning member and pedestal are placed in baking oven and preheated, the tensioning member and pedestal are rectangular
Body structure, oven temperature are set as 100 DEG C, preheat 15min；Matrix pitch is placed in 135 DEG C or so of baking oven and is heated to dripping
Green grass or young crops is in flow regime, and wherein matrix pitch is represented with CA；
S2, test specimen preliminary preparation：Base-plates surface smears pitch and forms rectangular bonding course, and stretching is bonded on bonding course
Part, tensioning member and pedestal connect composition test specimen, the consolidation area S of survey calculation bonding course by bonding courset；The stretching of this example
Part and pedestal use 40*40*10mm granite stone, and it is 40mm* that matrix pitch CA is applied into the length of side of pedestal first
Rectangular bonding course is formed on 40mm surface, a line of bonding course and a line of base-plates surface are completely superposed, and solid
The application area of knot layer accounts for the 3/4 of base-plates surface area；Then bonding course is struck off with the blade by preheating；Finally will stretching
The length of side of part is that 40mm*40mm surface is bonded with bonding course, and tensioning member completely covers bonding course, and bonding course accounts for tensioning member
The 3/4 of surface area, now tensioning member and pedestal are connected composition test specimen, the consolidation area of survey calculation bonding course by bonding course
St=a × b × 3/4, wherein a are the length of tensioning member or pedestal, and b is the width of tensioning member or pedestal, and a and b size are equal
For for 40mm, St=a × b × 3/4=40 × 40 × 3/4=1200mm2；
S3, different soaking times test specimen preparation：The test specimen prepared in S2 and supporting test specimen are placed in design temperature
It is that supporting test specimen includes tensioning member, pedestal and bonding course, and supporting test specimen in S2 with making in 10 DEG C of miniature constant temperature water bath 14
Standby test specimen is identical, the steaming for immersing miniature constant temperature water bath 14 that pedestal in the pedestal in test specimen and supporting test specimen is lain low
In distilled water, immersion height is the 1/2 of base thickness, and soaking time is respectively 0h, 4h, 24h, 48h, 96h and 144h；
S4, test specimen shear fails intensity measure：The test specimen sample with different soaking times prepared in S3 is stood
10 DEG C of temperature control chamber 10 is put into, is tested at once after stable 5min, wherein the tensioning member in test specimen is clamping upper
It is on jaw 4, the pedestal in test specimen is clamping on lower jaw 6, the rotating speed of motor 7 is set by computer, it is ensured that sill 2
Rate travel is 1mm/min, and the test specimen sample prepared in S3 is tested and obtains the shear fails load F of each test specimen,
The consolidation area S obtained according to S2tThe shear fails intensity R of each test specimen is calculatedt, result of calculation such as table 1 and Fig. 4；
S5, supporting test specimen water oilstone interface moisture content simulation calculate：Using ABAQUS mass diffusion modules,
And the moisture diffusion coefficients D in mass diffusion modules is set according to the material of the supporting test specimen prepared in S3rockNumber
Value, it is specified that the moisture concentration in all faces of water-immersed supporting test specimen is 1, simulation calculate supporting test specimen soaking time with it is supporting
Relation between the water oilstone interface moisture content of test specimen, and the shear fails for combining the test specimen for obtaining different soaking times in S4 are strong
Spend Rt, obtain the water oilstone interface moisture content of test specimen and the shear fails intensity R of test specimentBetween relation；Spread in the present embodiment
Coefficient Drock, is arranged to 0.6mm2/ h, and according to following calculation formula：
Represent the moisture content of supporting test specimen, CmFor moisture concentration, as 1,For the concentration pole of test block moisture carrying
Limit value, the moisture content for the supporting test specimen that the present embodiment measures is the concentration limit value of the moisture carrying of supporting test specimen, is obtained such as Fig. 6
The matched curve of shown test specimen soaking time and interface water content, and then obtained according to the curve for being fitted to obtain in Fig. 3 such as Fig. 7
In the interface water content of matrix pitch and general shear failure intensity R at 10 DEG CtRelation.
Embodiment two
Preparation before S1, experiment：Tensioning member and pedestal are placed in baking oven and preheated, the tensioning member and pedestal are rectangular
Body structure, oven temperature are set as 100 DEG C, preheat 15min；Silane Silica Modified Asphalt is placed in 135 DEG C or so of baking oven
It is in flow regime to be inside heated to pitch, and wherein silane Silica Modified Asphalt is represented with SSA；
S2, test specimen preliminary preparation：Base-plates surface smears pitch and forms rectangular bonding course, and stretching is bonded on bonding course
Part, tensioning member and pedestal connect composition test specimen, the consolidation area S of survey calculation bonding course by bonding courset；The stretching of this example
Part and pedestal use 40*40*10mm granite stone, and silane Silica Modified Asphalt SSA is applied into pedestal first
The length of side is to form rectangular bonding course on 40mm*40mm surface, and a line of bonding course and a line of base-plates surface are complete
Full weight is closed, and the application area of bonding course accounts for the 3/4 of base-plates surface area；Then bonding course is scraped with the blade by preheating
It is flat；Finally the surface that the length of side of tensioning member is 40mm*40mm is bonded with bonding course, tensioning member completely covers bonding course, and
Bonding course accounts for the 3/4 of tensioning member surface area, and now tensioning member is connected composition test specimen with pedestal by bonding course, and survey calculation is solid
Tie the consolidation area S of layert=a × b × 3/4, wherein a are the length of tensioning member or pedestal, and b is the width of tensioning member or pedestal
Degree, a and b size are for 40mm, St=a × b × 3/4=40 × 40 × 3/4=1200mm2；
S3, different soaking times test specimen preparation：The test specimen prepared in S2 and supporting test specimen are placed in and be set
Temperature is in 10 DEG C of the distilled water of miniature constant temperature water bath 14, and supporting test specimen includes tensioning member, pedestal and bonding course, and supporting
Test specimen is identical with the test specimen prepared in S2, by the immersion miniature constant temperature that pedestal lies low in the pedestal in test specimen and supporting test specimen
In the distilled water of water bath 14, immersion height be base thickness 1/2, soaking time be respectively 0h, 4h, 24h, 48h, 96h and
144h；
S4, test specimen shear fails intensity measure：The test specimen sample with different soaking times prepared in S3 is stood
10 DEG C of temperature control chamber 10 is put into, is tested at once after stable 5min, wherein the tensioning member in test specimen is clamping upper
It is on jaw 4, the pedestal in test specimen is clamping on lower jaw 6, the rotating speed of motor 7 is set by computer, it is ensured that sill 2
Rate travel is 1mm/min, and the test specimen sample prepared in S3 is tested and obtains the shear fails load F of each test specimen,
The consolidation area S obtained according to S2tThe shear fails intensity R of each test specimen is calculatedt, result of calculation such as table 1 and Fig. 4；
S5, interface water content are identical with embodiment one with soaking time；Because in embodiment two and embodiment one
Use tensioning member and pedestal be identical, be 40*40*10mm granite stone, health process reclaimed water from pedestal to
Oilstone interface spread, during diffusion, water pass through material be all pedestal, so the interface water content in embodiment two with
The relation of soaking time is as in embodiment one, i.e., soaking time is only relevant with pedestal with the relation of interface water content, with
The material filled out between pedestal and tensioning member is unrelated；
General shear intensity statistics table under the basis bitumen and modified bitumen difference soaking time of table 1
Pay attention to：Temperature of soaking and the test temperature of temperature control chamber 10 are 10 DEG C
As shown in Figure 4 and Table 1, it is known that the either leaching of matrix pitch pitch or silane Silica Modified Asphalt short time
Water is with regard to that can be greatly reduced consolidation interface shear strength, and interface moisture content tends to saturation, boundary after 48 hours
Surface intensity enters the steady decline stage.
By the fitting to soaking time obtained above and total shear strength relation, the total shearing for obtaining matrix pitch is strong
The fit curve equation of degree and soaking time is y=2 × 10-5x2- 0.004x+0.445, R2=0.916；Silane white carbon is modified
Total shear strength of pitch and the fit curve equation of soaking time are y=3 × 10-5x2- 0.007x+0.638, R2=0.895.
By calculating, simulation has obtained the relation of average moisture content and soaking time such as Fig. 6 at the consolidation of test specimen oilstone interface,
And matched curve is Φ=1-e0.0093-0.0188t, wherein t is soaking time, residual sum of squares (RSS) SSe=0.0045, R2=
0.9943。
General shear intensity and interface moisture content Φ relation are obtained with reference to above-mentioned result of the test and numerical result,
Wherein general shear intensity is abbreviated as ToSS, i.e. The overall shear strength by expression in formula for convenience.
Matrix pitch general shear intensity and interface water content matched curve such as Fig. 7, regression formula are as follows at 10 DEG C：
Residual sum of squares (RSS) SSeFor 0.0001, coefficient of determination R2For 0.99.Obvious fitting result is more preferable, illustrates changing rule more
Add stabilization.
Silane hard charcoal albertite general shear intensity and the regression formula of interface moisture content are as follows under the conditions of 10 DEG C：
Residual sum of squares (RSS) SSeFor 0.0001, coefficient of determination R2For 0.99.Same obvious fitting result is more preferable, illustrates change rule
Rule is more stable.It can further illustrate the anti-water damage property of silane Silica Modified Asphalt material than matrix pitch
It is better.
In summary, the research method being combined by the numerical simulation of designed, designed with laboratory test, it may be determined that oil
Stone interface moisture content and the relation of contact surface general shear intensity.Test specimen is immersed in the water of certain temperature, so that oilstone circle
Face reaches certain moisture content, carries out the test of shear strength immediately after the defined immersion time is reached, carrys out quantitative study circle
Influence of the face water to oilstone interface shear strength.Water can ensure consolidation failure from the bottom percolation from pedestal to oilstone interface
Produce, and the moisture diffusion coefficients D in the mass diffusion modules setting rock material for passing through ABAQUSrockSimulation meter
Calculate, the changing rule of interface moisture content can be obtained well, effectively improve past empirical method, it is ensured that test data is more
Accurate science.
Disclosed above is only presently preferred embodiments of the present invention, and still, the embodiment of the present invention is not limited to this, Ren Heben
What the technical staff in field can think change should all fall into protection scope of the present invention.
Claims (8)
1. the aqueous oilstone interface consolidation strength test method of bituminous paving, it is characterised in that comprise the following steps that：
Preparation before S1, experiment：Tensioning member and pedestal are placed in baking oven and preheated, the tensioning member and pedestal are cuboid knot
Structure, it is in flow regime that pitch, which is placed in baking oven, and is heated to pitch；
S2, test specimen preliminary preparation：Base-plates surface smears pitch and forms rectangular bonding course, and tensioning member is bonded on bonding course,
Tensioning member connects composition test specimen, the consolidation area S of survey calculation bonding course with pedestal by bonding courset；
S3, different soaking times test specimen preparation：The test specimen prepared in S2 and supporting test specimen are placed in and have preset temperature
In the auxiliary device of degree, the supporting test specimen includes pedestal, pitch bonding course and tensioning member, the pedestal of the test specimen and supporting examination
The pedestal of part is immersed in the distilled water of auxiliary device, and the immersion height of pedestal is less than the whole height of pedestal, changes the leaching of pedestal
The water time, prepare the test specimen sample with different soaking times and the supporting test specimen sample with different soaking times；
S4, test specimen shear fails intensity measure：The test specimen sample with different soaking times prepared in S3 is put immediately
In carrying out shearing test in the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving for presetting temperature, record each
The shear fails load F of test specimen, the consolidation area S obtained according to S2tThe shear fails intensity R of each test specimen is calculatedt；
S5, supporting test specimen water oilstone interface moisture content simulation calculate：Using ABAQUS mass diffusion modules, and root
Moisture diffusion coefficients D in mass diffusion modules is set according to the material of the supporting test specimen prepared in S3rockNumerical value, rule
The moisture concentration in all faces of fixed water-immersed supporting test specimen is 1, and simulation calculates supporting test specimen soaking time and supporting test specimen
Water oilstone interface moisture content between relation, and combine S4 in obtain different soaking times test specimen shear fails intensity
Rt, obtain the water oilstone interface moisture content of test specimen and the shear fails intensity R of test specimentBetween relation.
2. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 1, it is characterised in that the S1
In tensioning member and pedestal be placed in preheating 5-20min in 80-120 DEG C of baking oven, the size of the tensioning member and pedestal is 40*
40*10mm cuboid stone, the pitch in the S1 are one kind in traditional asphalt, modified pitch or asphalt mastic, institute
The supporting test specimen stated in S3 is identical with the test specimen prepared in S2.
3. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 1, it is characterised in that the S3
In auxiliary device be miniature constant temperature water bath (14), the bottom of the madial wall of the miniature constant temperature water bath (14) is provided with temperature
Sensor (12) is spent, control dial plate (15), the miniature constant temperature are provided with the lateral wall of the miniature constant temperature water bath (14)
The bottom of the lateral wall of water bath (14) is provided with the temp-controlling element (13) extended in miniature constant temperature water bath (14), the control
Warm element (13) is horizontally set in miniature constant temperature water bath (14), and the temp-controlling element (13) is U-shaped immersion type heating element, institute
Temperature sensor (12) and temp-controlling element (13) is stated to be connected with outside control dial plate (15) by data line.
4. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 3, it is characterised in that the S4
In the aqueous oilstone interface consolidation strength shearing test apparatus of bituminous paving include base (8) and temperature control chamber (10)；
The base (8) includes the first plate (8-1) and cuboid cavity (8-3), and first plate (8-1) directly connects with ground
Touch, the cuboid cavity (8-3) is mutually perpendicular to the first plate (8-1) and integral type is connected, in the cuboid cavity (8-3)
Second plate (8-2) parallel with the first plate (8-1) is provided with, cuboid cavity (8-3) is divided into by second plate (8-2)
Upper and lower two parts, the lower part of the cuboid cavity (8-3) are provided with compressor (11), the cuboid cavity (8-3)
Upper part is provided with motor (7), and the top integral type of the base (8) is provided with temperature control chamber (10), the compressor
(11) blast pipe is connected with the air inlet of temperature control chamber (10), and the compressor (11) is used for realizing to temperature control chamber
(10) control of interior temperature, the motor (7) are connected by data line (9) with external computer；
The internal top of the temperature control chamber (10) is fixedly installed entablature (1), temperature control chamber (10) inside
The center of bottom is fixedly installed lower jaw (6), and the both ends of the entablature (1) are respectively connected with a screw mandrel (5),
The screw mandrel (5) is vertical with the bottom of temperature control chamber (10), and the screw mandrel (5) is lived with the internal bottom of temperature control chamber (10)
It is dynamic to connect, a sill (2) is connected with two screw mandrels (5), the sill (2) is parallel with entablature (1)
And the axis of the vertical direction of sill (2) overlaps with the axis of temperature control chamber (10) vertical direction, the sill
(2) upper jaw (4) is connected with by be hinged chain bar (3) on, the bottoms of two screw mandrels (5) respectively by shaft coupling with it is electronic
The output end of machine (7) connects, and is provided with shear force sensor on the sill (2), the shear force sensor passes through data
Transmission line (9) is connected with external computer.
5. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 4, it is characterised in that on described
The axis of jaw (4) vertical direction and the axis of lower jaw (6) vertical direction are mutually staggered, and the upper jaw (4)
It is fixed on by be hinged chain bar (3) on sill (2), the motor (7) drives screw mandrel (5) to rotate, and the screw mandrel (5) drives
Sill (2) moves up or down along screw mandrel (5).
6. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 4, it is characterised in that testing
When temperature requirement is more than 0 DEG C, first by the water in miniature constant temperature water bath (14) and temperature control chamber (10) control in required temperature
Degree, then test specimen is put into miniature constant temperature water bath (14) and cultivated, after culture, test specimen is put into temperature control chamber rapidly
(10), shearing test is carried out at once after stable 3-8min；
When test temperature is less than 0 DEG C, the water management in miniature constant temperature water bath (14) is tested temperature control at 4-6 DEG C first
Then test specimen is put into miniature constant temperature water bath (14) and cultivated in the temperature of test requirements document by the temperature control of case (10), culture
After, take out test specimen and wind parcel with preservative film, be immediately placed in temperature control chamber (10), temperature control causes the temperature of test specimen to reach
To the temperature of experiment, preservative film is finally removed, shearing test is carried out after stable 3-8min.
7. the aqueous oilstone interface consolidation strength test method of bituminous paving as claimed in claim 1, it is characterised in that the S2
In consolidation area StMeet St=a × b × 3/4, wherein a are the length of tensioning member or pedestal, and b is tensioning member or pedestal
Width, a and b size are shear fails load F, consolidation area S in the S4 for 40mmtAnd shear fails intensity Rt
Between relation meet Rt×St=F.
8. the aqueous oilstone interface consolidation method for testing performance of bituminous paving as claimed in claim 1, it is characterised in that the S5
In interface moisture content simulation calculate meet following condition：
WhereinRepresent interface moisture content, CmFor moisture concentration,For the concentration limit value of test specimen moisture carrying.
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| CN111766201A (en) * | 2020-07-29 | 2020-10-13 | 滕国粹 | Method for evaluating adhesion effect of asphalt, asphalt binder and mineral aggregate under low-temperature condition |
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