CN106769792B - Device and method of the Asphalt mix for open-graded friction course eight to infiltration coefficient is tested simultaneously - Google Patents
Device and method of the Asphalt mix for open-graded friction course eight to infiltration coefficient is tested simultaneously Download PDFInfo
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- 230000008595 infiltration Effects 0.000 title claims abstract description 110
- 238000001764 infiltration Methods 0.000 title claims abstract description 110
- 239000010426 asphalt Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000000203 mixture Substances 0.000 claims abstract description 76
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 239000000741 silica gel Substances 0.000 claims description 16
- 229910002027 silica gel Inorganic materials 0.000 claims description 16
- 229960001866 silicon dioxide Drugs 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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Abstract
The invention discloses test device and method of the Asphalt mix for open-graded friction course eight to infiltration coefficient simultaneously, the device includes water tank, three-level support system, infiltration system and drainage collection system, water tank bottom offers apopore, the side wall of water tank offers overflow pipe, infiltration system includes top cover and infiltration cylinder, and drainage collection system is connected by 8 through-holes of corresponding hose and the cylinder that seeps water.The method includes the steps of: step 1: preparing the vertical sample of Asphalt mix for open-graded friction course and radial sample；Step 2: test infiltration coefficient device is chosen；Step 3: the eight of the test vertical sample of mixture are to infiltration coefficient；Step 4: the eight of radial sample are tested to infiltration coefficient.Apparatus of the present invention structure is simple, and it is convenient to operate, and can test the infiltration coefficient in mixture horizontal plane with eight directions in vertical plane, so as to analyze the direction otherness of permeability performance from three-dimensional space, with the permeability performance of the big gap mixture of thoroughly evaluating.
Description
Technical field
The present invention relates to device and method of the Asphalt mix for open-graded friction course eight to infiltration coefficient is tested simultaneously, it is mixed to belong to pitch
Close the test and evaluation technical field of material permeance property.
Background technique
Asphalt mix for open-graded friction course is with functions such as its excellent antiskid, noise reduction, rainy day draining, anti-dazzles, in bituminous pavement
In obtained the application in larger range.The presence of these functions depends on company abundant inside Asphalt mix for open-graded friction course
Logical gap.During permeable asphalt mixture design, generallys use two methods and ensure connection abundant inside mixture
Gap.First method is claimed to the total void rate or connectivity gap rate of asphalt；Another method considers
Connectivity gap in Asphalt mix for open-graded friction course is infiltration and drainage channel, and connectivity gap is abundanter, the effect of infiltration and draining
Rate is higher, therefore tests the infiltration coefficient of Asphalt mix for open-graded friction course, with connection inside the size reflection mixture of infiltration coefficient
The degree in gap.Since infiltration coefficient directly reflects the asphalt permeability performance being closely related with connectivity gap, compare
In total void rate, testing infiltration coefficient seems more effective and intuitive.Therefore, in order to guarantee Asphalt mix for open-graded friction course making in road
Have the function of good antiskid, draining, noise reduction etc. behind face, its permeability performance is tested during permeable asphalt mixture design
It is very crucial.
Currently, the interior and field condition test to Permeability Coefficient of Asphalt Mixture often assume that the infiltration of its all directions
Coefficient is identical.But asphalt is as a kind of heterogeneous, anisotropic material, internal gap structure tool
There is direction otherness, this otherness will lead to permeability performance and have directive otherness.2004, Al-Omari and Masad
Flowing of the water in asphalt mixture gap structure is simulated using finite difference calculus, and calculates 8 kinds of asphalt diameters
To, lateral and vertical infiltration coefficient, the radial and lateral infiltration coefficient difference of discovery is little, but vertical permeable coefficient is much smaller than
Radial and lateral infiltration coefficient.2005, the macro-scale analog study that Hunter and Airey are carried out was it has also been found that pavement asphalt
Water flow inside mixture is mainly the horizontal direction that edge is parallel to road table, and vertical few infiltrations.Kutay in 2007 et al.
Three-dimensional gap structure inside dense bitumen mixture established using X-ray CT, and numerical simulation water is in three-dimensional gap
Flowing in structure, discovery coupon level to infiltration coefficient can be higher by 2 orders of magnitude than vertical permeable coefficient maximum.
In view of direction otherness of the dense bitumen mixture on permeability performance and permeability performance are for big gap
The importance of asphalt, some scholars have studied the directionality of Asphalt mix for open-graded friction course permeability performance.2007,
On the basis of Masad et al. image obtained by X-ray CT scan, retain connectivity gap as drainage channel, and analyze connection
The directionality of gap directionality and infiltration coefficient, it is believed that compared to vertical direction, gap provides more in the horizontal direction
Drainage channel, in the multiple groups asphalt of numerical simulation, the ratio of dense-graded mix horizontal direction and vertical permeable coefficient
Range is 8.35-11.40, and the ratio range of Asphalt mix for open-graded friction course horizontal direction and vertical permeable coefficient is 1.65~4.02.
2012, Gruber etc. obtained the tridimensional network of Asphalt mix for open-graded friction course internal voids, and number using X-ray CT
Value simulates flowing of the water in three-dimensional gap structure, it was found that the infiltration coefficient difference in three directions of Asphalt mix for open-graded friction course
Reach 50% or so, this result and the result difference of Masad et al. are larger.
It summarizes existing research to can be found that: (1) compared to dense bitumen mixture, for Asphalt mix for open-graded friction course
The research for the direction difference that seeps water is simultaneously few, and the infiltration coefficient direction difference degree that different researchers obtain is not also identical.(2) big
What the existing research of gap mixture infiltration coefficient direction otherness used is only method for numerical simulation, using laboratory test
Method is directly tested same Asphalt mix for open-graded friction course test specimen and is had not been reported in the infiltration coefficient of different directions.For this purpose, very
It is necessary to invent a kind of device and method for testing Asphalt mix for open-graded friction course multiple directions infiltration coefficient.
Summary of the invention
To solve the above problems, eight sides of Asphalt mix for open-graded friction course are tested simultaneously the invention discloses a kind of
To the device and method of infiltration coefficient, solves the multi-direction infiltration coefficient of current Asphalt mix for open-graded friction course and depends on numerical simulation,
And the problem of can not testing simultaneously in laboratory, specific technical solution are as follows:
Device of the Asphalt mix for open-graded friction course eight to infiltration coefficient, including water tank, three-level support system, infiltration are tested simultaneously
System and drainage collection system.
The three-level support system includes superior platforms, Medium Stressed Platform, junior's platform and bracket, and the bracket puts down higher level
Platform, Medium Stressed Platform and the support of junior's plateau levels are fixed, between reserving between the superior platforms, Medium Stressed Platform and junior's platform
Away from；
The water tank is placed in superior platforms, and the water tank bottom offers apopore, and the side wall of the water tank offers
With the overflow pipe of water tank perforation, guarantee that the water in water tank is in constant head height by overflow pipe；
The infiltration system is placed on intermediate rack platform, and the infiltration system includes top cover and infiltration cylinder, the top
It covers tightly and is fixed on infiltration cylinder, bitumen mixture specimen is placed in the infiltration cylinder, the top cover offers water receiving hole, institute
The apopore for stating water receiving hole and water tank is connected by outlet pipe, and the infiltration medial wall of the tube pastes 8 pieces of equidistant silicagel pads, is seeped
8 pieces of silicagel pads that adjacent angle is 45 ° are pasted in bottom on the inside of water drum, and in infiltration cylinder bottom, there are 8 through-holes, each through-hole positions
Between adjacent two silicagel pad；
On junior's rack platform surface, the drainage collection system includes 8 graduated cylinders for drainage collection system setting, and 8
A graduated cylinder is connected by 8 through-holes of corresponding hose and the cylinder that seeps water.
There are two horizontal bubble instrument, two horizontal bubble instrument to be mutually perpendicular to for setting on the Medium Stressed Platform.
The Medium Stressed Platform is supported by three foot props being fixed on junior's platform, and the foot prop includes inner sleeve and outer
Casing, the inner sleeve and outer tube are fixed by wing bolt, and the wing bolt is threadedly coupled with outer tube, wing bolt
Inner end be pressed against inner sleeve, fix it.
The top cover is threadedly coupled with infiltration cylinder, and the infiltration cylinder selects the cylindrical drum of steel material.
8 hoses are bundled together in the middle position collection of hose, and a valve is arranged at boundling, pass through the valve
Unified 8 hoses of switch of door.
The water receiving hole opens up outward from the axle center of top cover, and the aperture in the water receiving hole is 80mm, is equipped with thickness in top cover
Width for the rubber ring of 5mm, the vertical silica gel strip for the cylinder inner wall that seeps water is 5mm；The internal diameter of the infiltration cylinder is 136mm, height
For 150mm, thickness is 20mm, and the width of silicagel pad is 5mm, and height is 50mm, and the through-hole aperture at the cylinder bottom for the cylinder that seeps water is 30mm.
Method of the Asphalt mix for open-graded friction course eight to infiltration coefficient is tested simultaneously comprising the steps of:.
Step 1: the vertical and radial sample of Asphalt mix for open-graded friction course: two groups of gyratory compaction molding big gap pitches is prepared
Compound test specimen, one group of test specimen drill through diameter and height are the big gap mixture cylindrical body examination of 100mm along its axial direction
Sample, another group of test specimen radially direction, drills through diameter and height is the big gap mixture cylindrical specimens of 100mm；
Step 2: while selection as described in claim 1-6 test Asphalt mix for open-graded friction course eight to infiltration coefficient
Device；
Step 3: the test vertical sample of Asphalt mix for open-graded friction course: what is drilled through in step 1 along its axial direction
One group of Asphalt mix for open-graded friction course sample rotates top cover along the infiltration cylinder of infiltration cylinder vertical direction push-in infiltration system, makes
It is closely coupled with infiltration cylinder, adjusts valve that is horizontal, and closing 8 hoses to three-level support system, and fill the water into water tank
After head is constant in water tank, the valve of 8 hoses is opened, valve is closed after 60s, and reads the body of water in 8 graduated cylinders respectively
Product, byCalculate the infiltration coefficient P on the i-th directioni, ViFor the volume of water in i-th of graduated cylinder, what is obtained is pitch mixing
Expect the infiltration coefficient in 8 directions in the horizontal plane；
Step 4: test Asphalt mix for open-graded friction course test specimen radial direction sample: radially direction drills through in selecting step one
Another group of Asphalt mix for open-graded friction course sample, by step 2 and step 3 operation after, what is obtained is asphalt vertical
The infiltration coefficient in 8 directions in plane.
The beneficial effects of the present invention are:
Apparatus of the present invention apparatus structure is simple, and it is convenient to operate.The infiltration in eight directions in mixture horizontal plane can not only be tested
Water coefficient, moreover it is possible to test from all directions to infiltration coefficient in vertical plane, so as to analyze the direction of permeability performance from three-dimensional space
Otherness, with the permeability performance of the big gap mixture of thoroughly evaluating.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention,
Fig. 2 is the longitudinal sectional view of top cover,
Fig. 3 is the cross-sectional view for permeating cylinder,
Fig. 4 is the top view of Fig. 3,
Fig. 5 is the structural schematic diagram of foot prop,
Fig. 6 is the schematic diagram of axial drilling coring,
Fig. 7 is the schematic diagram of radial bore coring,
Reference signs list: 1-water tank, 2-overflow pipes, 3-superior platforms, 4-outlet pipes, 5-top covers, 6-seep
Water drum, 7-horizontal bubble instrument, 8-Medium Stressed Platforms, 9-junior's platforms, 10-valves, 11-hoses, 12-graduated cylinders, 13-three
Grade support system, 14-rubber rings, 15-water receiving holes, 16-silica gel strips, 17-silicagel pads, 18-through-holes, 19-wing bolts.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated.It should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
Fig. 1 is the structural schematic diagram of apparatus of the present invention, in conjunction with attached drawing as it can be seen that test simultaneously Asphalt mix for open-graded friction course eight to
The device of infiltration coefficient, including water tank 1, three-level support system 13, infiltration system and drainage collection system.
The three-level support system 13 includes superior platforms 3, Medium Stressed Platform 8, junior's platform 9 and bracket, and the bracket will
Superior platforms 3, Medium Stressed Platform 8 and the horizontally-supported fixation of junior's platform 9, the superior platforms 3, Medium Stressed Platform 8 and junior's platform 9
Between reserve spacing.
The water tank 1 is placed in superior platforms 3, and 1 bottom of water tank offers apopore, and the side wall of the water tank opens up
There is the overflow pipe 2 with water tank perforation, guarantees that the water in water tank is in constant head height by overflow pipe 2.
The infiltration system is placed on intermediate rack platform, the infiltration system include top cover 5 and infiltration cylinder 6, it is described
Top cover 5 is threadedly coupled with infiltration cylinder 6, bitumen mixture specimen is placed in the infiltration cylinder 6, the top cover 5 offers water receiving
Hole 15, the water receiving hole 15 and the apopore of water tank 1 are connected by outlet pipe 4.Fig. 2 is the longitudinal sectional view of top cover 5, in conjunction with attached
Figure is as it can be seen that be equipped with the rubber ring 14 with a thickness of 5mm in top cover 5, to guarantee after screwing top cover 5, bottom and steel cylinder top are close
It contacts, is impermeable.Fig. 3 is the cross-sectional view for permeating cylinder, and Fig. 4 is the top view of Fig. 3, in conjunction with attached drawing as it can be seen that 6 inside of the infiltration cylinder
Wall pastes 8 pieces of equidistant silica gel strips 16, and 8 pieces of silicagel pads 17 that adjacent angle is 45 ° are pasted in the bottom of 6 inside of infiltration cylinder,
Seeping water, there are 8 through-holes 18 for 6 bottom of cylinder, and each through-hole 18 is between adjacent two silicagel pad 17.
On junior's rack platform surface, the drainage collection system includes 8 graduated cylinders 12 for the drainage collection system setting,
8 through-holes 18 that 8 graduated cylinders 12 pass sequentially through corresponding hose 11 and infiltration cylinder 6 are connected.
There are two horizontal bubble instrument 7, two horizontal bubble instrument 7 to be mutually perpendicular to for setting on the Medium Stressed Platform 8.
Fig. 5 is the structural schematic diagram of foot prop, and the foot prop includes inner sleeve and outer tube, and the inner sleeve and outer tube are logical
It is fixed to cross wing bolt 19, the wing bolt 19 is threadedly coupled with outer tube, and the inner end of wing bolt 19 is pressed against inner sleeve
Pipe, fixes it.By unclamping the wing bolt 19 in foot prop, the height of telescopic foot stool, it is ensured that Medium Stressed Platform 8 is in horizontal plane
It is interior.
8 hoses 11 are bundled together in the middle position collection of hose 11, and a valve 10 is arranged at boundling, are led to
Cross unified 8, the switch hose 11 of the valve 10.
The water receiving hole 15 opens up outward from the axle center of top cover 5, and the aperture in the water receiving hole 15 is 80mm；The infiltration cylinder
6 internal diameter is 136mm, is highly 150mm, and the width of the vertical silica gel strip 16 for 6 inner wall of cylinder that seeps water is 5mm, and thickness is 20mm, silicon
The width of rubber mat 17 is 5mm, and height is 50mm, and 18 aperture of through-hole at the cylinder bottom for the cylinder 6 that seeps water is 30mm.
Method of the Asphalt mix for open-graded friction course eight to infiltration coefficient is tested simultaneously comprising the steps of:
Step 1: two groups of Asphalt mix for open-graded friction course samples of preparation: two groups of Asphalt mix for open-graded friction course of gyratory compaction molding
Test specimen.One group of test specimen drills through diameter and height is the big gap mixture cylindrical body examination of 100mm along its axial (vertical) direction
Sample, as shown in Figure 6；Another group of test specimen radially direction, drills through diameter and height is the big gap mixture cylinder of 100mm
Body sample, as shown in Figure 7；
Step 2: while selection as described in claim 1-6 test Asphalt mix for open-graded friction course eight to infiltration coefficient
Device；
Step 3: it one group of Asphalt mix for open-graded friction course test specimen of test: is drilled through in step 1 along its axial (vertical) direction
One group of obtained Asphalt mix for open-graded friction course sample is washed off dust and mountain flour in its surface void with high pressure water flushing, and is adopted
Sample bottom surface is sealed with paraffin.After paraffin is dry, along the infiltration cylinder of infiltration cylinder vertical direction push-in infiltration system, and rotate
Top cover keeps it closely coupled with infiltration cylinder, adjusts valve that is horizontal, and closing 8 hoses to three-level support system, and to water tank
Interior water filling opens the valve of 8 hoses, valve is closed after 60s after head is constant in water tank, and reads in 8 graduated cylinders respectively
The volume of water, byCalculate the infiltration coefficient P on the i-th directioni, ViFor the volume of water in i-th of graduated cylinder, what is obtained is drip
The infiltration coefficient in green mixture 8 directions in the horizontal plane；
Step 4: test another group of Asphalt mix for open-graded friction course test specimen: radially direction drills through in selecting step one
Another group of Asphalt mix for open-graded friction course sample, after step 2 and step 3 operation, what is obtained is that asphalt is vertically being put down
The infiltration coefficient in 8 directions in face.
Embodiment:
Below by embodiment, the device of 8 direction infiltration coefficients of Asphalt mix for open-graded friction course is described in detail while tested
And method.
By mineral aggregate gradation listed by table 1, using 4.7% asphalt content, gyratory compaction molding voidage is 19%
Asphalt mix for open-graded friction course OGFC-13 test specimen 4, the height of test specimen is 120mm, diameter 150mm.
1 mineral aggregate gradation of table
| Screen size (mm) | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent of pass (%) | 100 | 91.0 | 62.5 | 25.5 | 16.4 | 12.9 | 10.2 | 7.3 | 6.2 | 4.9 |
To 2 test specimens therein, cylinder core sample is drilled through along the radial direction of test specimen using drilling machine, core diameter 100mm,
Two ends of core sample are cut flat with, the small cylinder sample that height is 100mm is obtained.To other two vertically core boring sampling,
Another group of small cylinder sample is obtained after cutting flat with.It washes down to remove using high pressure water flushing and is adhered to specimen surface gap in boring procedure
Interior dust and mountain flour.Using the bottom surface of paraffin sealing small cylinder sample, it is ensured that bottom surface gap is enclosed.
4 small cylinder samples are tested with the infiltration coefficient in 8 directions respectively, specifically: a sample pushing in device
Infiltration cylinder in, screw top cover.3 foot props are adjusted, so that the bubble on Medium Stressed Platform in two horizontal bubble instrument is placed in the middle.It closes
The common valve of 8 hoses.To water tank with water, after stable level is at the head position of 30cm height, valve is opened, makes to seep
Water in water system flows into graduated cylinder by hose, turns off the switch after 60s, and read the volume of water flow in each graduated cylinder.ByCalculate the infiltration coefficient P on the i-th directioni, ViFor the volume of water in i-th of graduated cylinder.According to said method obtain 4 test specimens
Infiltration coefficient is as shown in table 2.
The infiltration coefficient of table 24 asphalts, 8 angles
| 8 angles | 0 | 45° | 90° | 135° | 180° | 225° | 270° | 315° |
| Radial sample 1# (ml/s) | 62 | 54 | 41 | 57 | 66 | 56 | 43 | 52 |
| Radial sample 2# (ml/s) | 65 | 50 | 39 | 58 | 63 | 54 | 43 | 49 |
| Vertical sample 1# (ml/s) | 55 | 61 | 57 | 64 | 56 | 60 | 67 | 58 |
| Vertical sample 2# (ml/s) | 58 | 60 | 51 | 64 | 66 | 55 | 58 | 57 |
From table 2 it can be seen that the infiltration coefficient of same asphalt sample different angle is not identical, and radial direction drills through
The difference of infiltration coefficient is greater than the sample vertically drilled through between sample angle.The sample radially drilled through from big cylinder test specimen,
The difference of infiltration coefficient maxima and minima has been even up to 50% or so, it is seen that traditional uses single direction infiltration coefficient
Evaluation asphalt permeance property is simultaneously unreasonable.In this sense, the present invention tests 8 sides of asphalt simultaneously
It has a good application prospect to the device and method of infiltration coefficient in ground surface material performance evaluation field.
The technical means disclosed in the embodiments of the present invention is not limited to the technical means disclosed in the above technical means, and further includes
Technical solution consisting of any combination of the above technical features.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (6)
1. testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient simultaneously, it is characterised in that comprise the steps of:
Step 1: it is radial with vertical sample to prepare Asphalt mix for open-graded friction course: two groups of gyratory compaction molding big gap pitch mixes
Expect test specimen, one group of test specimen drills through diameter and height is the big gap mixture cylindrical specimens of 100mm along its axial direction,
Another group of test specimen radially direction, drills through diameter and height is the big gap mixture cylindrical specimens of 100mm；
Step 2: it chooses while testing device of the Asphalt mix for open-graded friction course eight to infiltration coefficient, which includes water tank, three-level
Support system, infiltration system and drainage collection system；
The three-level support system includes superior platforms, Medium Stressed Platform, junior's platform and bracket, the bracket by superior platforms,
Medium Stressed Platform and the support of junior's plateau levels are fixed, and spacing is reserved between the superior platforms, Medium Stressed Platform and junior's platform；
The water tank is placed in superior platforms, and the water tank bottom offers apopore, and the side wall of the water tank offers and water
The overflow pipe of case perforation guarantees that the water in water tank is in constant head height by overflow pipe；
The infiltration system is placed on intermediate rack platform, and the infiltration system includes top cover and infiltration cylinder, the top cover lid
It fastens on infiltration cylinder, bitumen mixture specimen is placed in the infiltration cylinder, the top cover offers water receiving hole, described to connect
The apopore of water hole and water tank is connected by outlet pipe, and the infiltration medial wall of the tube pastes 8 pieces of equidistant silicagel pads, and seep water cylinder
8 pieces of silicagel pads that adjacent angle is 45 ° are pasted in the bottom of inside, and in infiltration cylinder bottom there are 8 through-holes, each through-hole is located at phase
Between adjacent two silicagel pads；
On junior's rack platform surface, the drainage collection system includes 8 graduated cylinders, 8 institutes for the drainage collection system setting
Graduated cylinder is stated to connect by 8 through-holes of corresponding hose and the cylinder that seeps water；
Step 3: the test vertical sample of Asphalt mix for open-graded friction course: one group drilled through in step 1 along its plotted
Asphalt mix for open-graded friction course sample rotates top cover along the infiltration cylinder of infiltration cylinder vertical direction push-in infiltration system, make its with
The cylinder that seeps water is closely coupled, adjusts valve that is horizontal, and closing 8 hoses to three-level support system, and water is worked as in water filling into water tank
After head is constant in case, the valve of 8 hoses is opened, valve is closed after 60s, and reads the volume of water in 8 graduated cylinders respectively, byCalculate the infiltration coefficient P on the i-th directioni, ViFor the volume of water in i-th of graduated cylinder, what is obtained is asphalt in water
The infiltration coefficient in 8 directions in plane；
Step 4: test the radial sample of Asphalt mix for open-graded friction course: in selecting step one radially direction drill through it is another
Group Asphalt mix for open-graded friction course sample, after step 2 and step 3 operation, what is obtained is asphalt 8 in vertical plane
The infiltration coefficient in a direction.
2. according to claim 1 while testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient, feature exists
In setting on the Medium Stressed Platform, there are two horizontal bubble instrument, two horizontal bubble instrument to be mutually perpendicular to.
3. according to claim 1 while testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient, feature exists
It being supported in the Medium Stressed Platform by three foot props being fixed on junior's platform, the foot prop includes inner sleeve and outer tube,
The inner sleeve and outer tube are fixed by wing bolt, and the wing bolt is threadedly coupled with outer tube, wing bolt it is interior
Side is pressed against inner sleeve, fixes it.
4. according to claim 1 while testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient, feature exists
It is threadedly coupled in the top cover with infiltration cylinder, the infiltration cylinder selects the cylindrical drum of steel material.
5. according to claim 1 while testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient, feature exists
It is bundled together in 8 hoses in the middle position collection of hose, and a valve is set at boundling, it is unified by the valve
8 hoses of switch.
6. according to claim 1 while testing method of the Asphalt mix for open-graded friction course eight to infiltration coefficient, feature exists
Opened up outward in the water receiving hole from the axle center of top cover, the aperture in the water receiving hole is 80mm, be equipped in the top cover with a thickness of
The rubber ring of 5mm；The internal diameter of the infiltration cylinder is 136mm, is highly 150mm；The vertical silica gel strip of the infiltration cylinder inner wall
Width is 5mm, and thickness is 20mm, and height is 102mm, and the width of silicagel pad is 5mm, and height is 50mm, the cylinder bottom for the cylinder that seeps water
Through-hole aperture is 30mm.
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| CN109142129A (en) * | 2018-09-25 | 2019-01-04 | 东南大学 | A kind of horizontal measuring device and assessment method for seeing permeance property of asphalt |
| CN110530776A (en) * | 2019-09-28 | 2019-12-03 | 东南大学 | A kind of experimental provision and test method measuring porous asphalt mixture drainage performance |
| CN110763607A (en) * | 2019-11-12 | 2020-02-07 | 云南省交通规划设计研究院有限公司 | Asphalt mixture water seepage performance tester and water seepage coefficient calculation method |
| CN110849791B (en) * | 2019-12-07 | 2022-02-18 | 郑州市交通规划勘察设计研究院 | Simple testing device for water seepage performance of asphalt test block |
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