CN109668817A - A kind of test device and test method of asphalt infiltration annoyance level - Google Patents
A kind of test device and test method of asphalt infiltration annoyance level Download PDFInfo
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- CN109668817A CN109668817A CN201910106930.8A CN201910106930A CN109668817A CN 109668817 A CN109668817 A CN 109668817A CN 201910106930 A CN201910106930 A CN 201910106930A CN 109668817 A CN109668817 A CN 109668817A
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- water
- water inlet
- inlet pipe
- salt water
- salt
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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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
Abstract
The present invention proposes the test device and test method of a kind of asphalt infiltration annoyance level, and including the cuboid waterproof case being enclosed on the outside of bitumen mixture specimen, the upper wall of the waterproof case is provided with water inlet, and lower wall is provided with lower outlet；Two opposing sidewalls of the waterproof case are provided with side water inlet and side water outlet；The upper wall inner surface of the waterproof case is provided with the sealing ring being enclosed on the outside of water inlet；Lower wall inner surface is provided with the sealing ring being enclosed on the outside of lower outlet；The side wall inner surfaces for being provided with side water inlet are provided with the sealing ring being enclosed on the outside of the water inlet of side；The side wall inner surfaces for being provided with side water outlet are provided with the sealing ring being enclosed on the outside of the water outlet of side.For the present invention by injecting deionized water and salt water from vertical direction to bitumen mixture specimen, calculating infiltration rate can accurately test unidirectional infiltration coefficient and the two-way infiltration coefficient of two dimension, and simple structure, easy to use.
Description
Technical field
The invention belongs to the assessment technique fields of asphalt permeability performance, in particular to asphalt unidirectional osmosis
The test device and test method that performance is interfered by vertical direction interconnected pore.
Background technique
Permeability performance is one of asphalt important performance, the infiltration using infiltration coefficient evaluation mixture main at present
Performance.For the dense bitumen mixture being applied on prevailing roadway, it is expected that it is with lesser infiltration coefficient, to reach close
Seal the purpose of surface precipitation；For the porous asphalt mixture being applied on drainage pavement, it is expected that it is with biggish infiltration
Number, to achieve the effect that Quick drainage.Therefore, infiltration coefficient is the important technical indicator of asphalt, tests infiltration coefficient
It is one of the link for carrying out performance evaluation in the Bitumen Mix Design stage.
Currently, the method for laboratory test Permeability Coefficient of Asphalt Mixture mainly experienced two stages, it is respectively: first
The unidirectional infiltration coefficient test of the asphalt in stage；Second stage is to consider Permeability Coefficient of Asphalt Mixture direction otherness
On the basis of, the two direction infiltration coefficient of two dimension of progress is tested.The first stage main process of unidirectional infiltration coefficient test is: at
Type asphalt marshal piece, under the conditions of not demoulding, by the way of constant head or varying head, with single in the unit time
Direction passes through the water of (flowing through) bitumen mixture specimen, as unidirectional infiltration coefficient.But since mixture formed
Compaction in journey, there is the othernesses in direction for internal void, this results in infiltration coefficient difference in different directions
It is larger, it causes unidirectional infiltration coefficient not and can accurately reflect the permeability performance of asphalt.In this context, road work
Author develops to second stage to the test of infiltration coefficient, and the groundwork in this stage is: according to rainwater in porous pavements reality
The flow process (first vertical to penetrate into, then laterally discharge) on border, has developed the test device of two direction infiltration coefficient of asphalt,
The infiltration coefficient for evaluating asphalt to infiltration coefficient by two overcomes the defect of unidirectional infiltration coefficient test.
But the test of above-mentioned unidirectional and two-dimentional two direction infiltration coefficients, all have ignored fact: true pavement asphalt
The seepage flow of mixture inner pore water be it is multi-direction carry out jointly, the seepage flow precedence of different directions (trend) hole takes
Certainly it may be subjected to the interference of other direction seepages in the percolation ability on its complicated pore structure, one direction and weaken.This
It is either unidirectional if resulting in the seepage flow interference for not considering different directions pore water, or the two-way test of two dimension, they are obtained
The infiltration coefficient arrived is still not accurate enough.Therefore, the annoyance level of hole seepage flow on asphalt different directions is tested extremely
It is necessary.
Summary of the invention
To solve the above problems, the present invention provides test device and the test side of a kind of asphalt interference infiltration rate
Method can accurately test unidirectional infiltration coefficient and the two-way infiltration coefficient of two dimension, and simple structure, easy to use.
Technical solution: the present invention proposes a kind of test device of asphalt infiltration annoyance level, including is enclosed in drip
Cuboid waterproof case on the outside of green compound test specimen, the upper wall of the waterproof case are provided with water inlet, and lower wall is provided with
Lower outlet；Two opposing sidewalls of the waterproof case are provided with side water inlet and side water outlet, and the side water inlet and
Side water outlet is located at same level；
The upper wall inner surface of the waterproof case is provided with the sealing ring being enclosed on the outside of water inlet；Lower wall inner surface is set
It is equipped with the sealing ring being enclosed on the outside of lower outlet；The side wall inner surfaces for being provided with side water inlet, which are provided with, is enclosed in side water inlet
The sealing ring in outside；The side wall inner surfaces for being provided with side water outlet are provided with the sealing ring being enclosed on the outside of the water outlet of side.
Further, the upper water inlet is provided with water inlet pipe；The side water inlet is provided with side water inlet pipe, the side
The height of water inlet pipe is higher than upper water inlet.
Further, scale is provided on the upper water inlet pipe and side water inlet pipe.
Further, valve is provided on the upper water inlet pipe and side water inlet pipe.
A kind of test method of asphalt infiltration annoyance level uses above-mentioned asphalt infiltration annoyance level
Test device, comprising the following steps:
Step 1: injecting certain density p from upper water inletSalt waterSalt water catch infiltration from lower outlet after seepage stability
Salt water out measures the volume Q of connect salt water1With time t used1；And calculate the percolation flow velocity v of salt water1=Q1/t1；
Step 2: injecting certain density p from upper water inletSalt waterSalt water, while from side water inlet inject deionized water, to
After seepage stability, the mixing water of exudation is caught from lower outlet；Measure quality m, the volume Q of connect mixing water2With the time used
t2；And calculate the interference percolation flow velocity v of salt water2；
Step 3: calculating flow rate-of-change s=[(v1-v2)/v1] × 100% come determine asphalt unidirectionally seep water by
Vertical direction interconnected pore annoyance level.
The mesohalobic interference percolation flow velocity v of step 22Calculation method be according to ρSalt waterQSalt water+ρWaterQWater=m, QSalt water+QWater
=Q2, solve QSalt water=(m- ρWaterQ2)/(ρSalt water-ρWater), by v2=QSalt water/t2Salt water is from bottom of device seepage flow when obtaining second of seepage flow
Speed v out2=(m- ρWaterQ2)/[t2(ρSalt water-ρWater)]；
Wherein QSalt waterIndicate Q2The volume of middle brine composition, ρWaterIndicate deionized water density, QWaterIndicate Q2Middle deionized water group
The volume divided.
The step 1 from upper water inlet injection salt water, step 2 from upper water inlet inject salt water and step 2 from side into
The pressure that deionized water is injected at the mouth of a river is identical.
The step 1 from one water inlet pipe inject salt water, step 2 from one water inlet pipe injection salt water and step 2 from
Side water inlet pipe injects deionized water, is flow automatically by liquid level of the liquid in respective pipeline and is injected；
When the step 1 injects salt water from upper water inlet pipe, upward water inlet pipe supplement salt water keeps the liquid level of upper water inlet pipe high
It spends constant；When step 2 injects salt water from upper water inlet pipe simultaneously and injects deionized water from side water inlet pipe, upward water inlet pipe supplement
Salt water keeps the liquid level of upper water inlet pipe constant, keeps the liquid level of side water inlet pipe not to side water inlet pipe supplement deionized water
Become.
The utility model has the advantages that the present invention is calculated by injecting deionized water and salt water from vertical direction to bitumen mixture specimen
Seep water rate, can accurately test unidirectional infiltration coefficient and the two-way infiltration coefficient of two dimension, and simple structure, easy to use.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of the sealing ring of waterproof case of the invention；
Fig. 3 is fixation support schematic diagram of the invention.
Specific embodiment
As shown in Figure 1, the test device of asphalt infiltration annoyance level of the invention is enclosed in pitch mixing
Expect that the cuboid waterproof case 1 on the outside of test specimen, the upper wall of the waterproof case 1 are provided with water inlet 2, lower wall is provided with down
The mouth of a river 3.Two opposing sidewalls of the waterproof case 1 are provided with side water inlet 4 and side water outlet 5, and 4 He of side water inlet
Side water outlet 5 is located at same level.
For the accuracy for guaranteeing experimental result, it need to guarantee that upper water inlet 2 is consistent with the pressure of side water inlet 4.The present invention makes
Used time passes through liquid level flood suction.Therefore the upper water inlet 2 is provided with upper water inlet pipe 7；The side water inlet 4
It is provided with side water inlet pipe 8.The height of the side water inlet pipe 8 is higher than upper water inlet 2, on the upper water inlet pipe 7 and side water inlet pipe 8
It is provided with scale, conveniently can accurately observe the page of two pipelines.It is provided on the upper water inlet pipe 7 and side water inlet pipe 8
Valve 9 facilitates switching water flooding regime.
The upper wall inner surface of the waterproof case 1 is provided with the sealing ring 6 for being enclosed in 2 outside of water inlet；Table in lower wall
Face is provided with the sealing ring 6 for being enclosed in 3 outside of lower outlet；The side wall inner surfaces for being provided with side water inlet 4, which are provided with, to be enclosed in
The sealing ring 6 in 4 outside of side water inlet；The side wall inner surfaces for being provided with side water outlet 5, which are provided with, is enclosed in 5 outside of side water outlet
Sealing ring 6.Above-mentioned sealing ring ensure that the liquid of injection will not flow directly to pitch mixing along bitumen mixture specimen outer surface
Expect other adjacent surfaces of test specimen；It also prevents in the liquid of outflow comprising straight along other adjacent external surfaces of bitumen mixture specimen
Connect the liquid for flowing through and.Therefore it ensure that the accuracy of experimental result.As shown in Fig. 2, the sealing ring 6 of the present embodiment is in being attached to
The well word structure that four sealing strips on wall surround, is sealed by the enclosure space at center.
In order to tell the infiltration coefficient in the two directions in two-way seepage tests, present invention employs salt water and go from
Two kinds of liquid of sub- water, salt water enter device from upper water inlet 2, and deionized water enters device from side water inlet 4.Two kinds of liquid it is close
Degree is different, and mixed volume can be directly superimposed, and can calculate the amount of respective component after mixing.And the flowing of both liquid
Property be not much different, so being influenced on the mobility of other side little.
Liquid is connect due to needing to place container below the device, needs to be tested on certain altitude, the present invention devises
Such as the fixation bracket of Fig. 3.Fixed bracket makes somebody a mere figurehead waterproof case 1, and aperture makes liquid at support bracket fastened supporting surface lower outlet 3
Outflow, easily catches liquid from below.
In addition the upper wall of waterproof case 1 is detachable, facilitates the taking and placing of bitumen mixture specimen.The interface of upper wall disassembly is set
Sealing structure is set, liquid outflow is prevented.
A kind of test method of asphalt infiltration annoyance level uses above-mentioned asphalt infiltration annoyance level
Test device, comprising the following steps:
Step 1: injecting certain density p from upper water inlet pipe 7Salt waterSalt water, and upwards water inlet pipe 7 supplement salt water keep it is enterprising
The liquid level of water pipe 7 is constant；Liquid is flow automatically by liquid level in the duct to be injected, after seepage stability, from lower water outlet
Mouth 3 catches the salt water of exudation, measures the volume Q of connect salt water1With time t used1；And calculate the percolation flow velocity v of salt water1=
Q1/t1。
Step 2: injecting certain density p from upper water inlet pipe 7Salt waterSalt water, while from side water inlet pipe 8 inject deionized water,
And the supplement of water inlet pipe 7 salt water keeps the liquid level of upper water inlet pipe 7 constant upwards, supplements deionized water to side water inlet pipe 8 and keeps
The liquid level of side water inlet pipe 8 is constant；Liquid is flow automatically by liquid level in the duct to be injected, after seepage stability, under
Water outlet 3 catches the mixing water of exudation；Measure quality m, the volume Q of connect mixing water2With time t used2；And calculate salt water
Interference percolation flow velocity v2；
The mesohalobic interference percolation flow velocity v of step 22Calculation method be according to ρSalt waterQSalt water+ρWaterQWater=m, QSalt water+QWater
=Q2, solve QSalt water=(m- ρWaterQ2)/(ρSalt water-ρWater), by v2=QSalt water/t2Salt water is from bottom of device seepage flow when obtaining second of seepage flow
Speed v out2=(m- ρWaterQ2)/[t2(ρSalt water-ρWater)]；
Wherein QSalt waterIndicate Q2The volume of middle brine composition, ρWaterIndicate deionized water density, QWaterIndicate Q2Middle deionized water group
The volume divided.
Step 3: calculating flow rate-of-change s=[(v1-v2)/v1] × 100% come determine asphalt unidirectionally seep water by
Vertical direction interconnected pore annoyance level.
Criterion are as follows: as s≤10%, annoyance level that asphalt unidirectionally seeps water by vertical direction interconnected pore
For slight effect；It is moderate influence as 10% < s≤20%；As s > 20%, influenced for severe.
Embodiment:
Porous asphalt mixture PFC-13 uses basalt aggregate and the levigate miberal powder of limestone for mineral aggregate, gradation such as table
Shown in 1, pitch uses SBS modified pitch, and fundamental property is as shown in table 2, miberal powder and pitch is carried out mix, then by rotating
The asphalt cylinder test specimen of compacting forming diameter 15cm, the test cube for being therefrom cut into side length 10cm are put into this
Invention device is tested, and experiment data measured is as shown in table 3.
The gradation and bitumen content of 1 PFC-13 test specimen of table
2 SBS modified pitch basic performance of table
Table 3 tests data measured
Following parameter is calculated by experiment data measured:
It calculates configuration brine density to obtain: ρSalt water=mSalt water/VSalt water=50/43.5=1.15g/cm3。
It calculates first time seepage flow salt water flow velocity and obtains v1=Q1/ t=33/60=0.55mL/s.
The speed v that salt water goes out from bottom of device seepage flow when calculating second of seepage flow2=(m-Q2)/[t×(ρSalt water- 1)]=
(34.6-31)/[60 × (1.15-1)]=0.40mL/s.
It calculates flow rate-of-change and obtains s=[(v1-v2)/v1] × 100%=[(0.55-0.40)/0.55] × 100%=
27.3%.
Because of v > 20%, which is attached most importance to by the annoyance level of vertical direction interconnected pore
Degree influences.
Claims (8)
1. a kind of test device of asphalt infiltration annoyance level, it is characterised in that: including being enclosed in asphalt examination
The upper wall of cuboid waterproof case (1) on the outside of part, the waterproof case (1) is provided with water inlet (2), and lower wall is provided with down
Water outlet (3)；Two opposing sidewalls of the waterproof case (1) are provided with side water inlet (4) and side water outlet (5), and described
Side water inlet (4) and side water outlet (5) are located at same level；
The upper wall inner surface of the waterproof case (1) is provided with the sealing ring (6) being enclosed on the outside of water inlet (2)；In lower wall
Surface is provided with the sealing ring (6) being enclosed on the outside of lower outlet (3)；It is provided with the side wall inner surfaces setting of side water inlet (4)
There is the sealing ring (6) being enclosed on the outside of side water inlet (4)；The side wall inner surfaces for being provided with side water outlet (5), which are provided with, to be enclosed in
Sealing ring (6) on the outside of side water outlet (5).
2. the test device of asphalt infiltration annoyance level according to claim 1, it is characterised in that: described enterprising
The mouth of a river (2) is provided with water inlet pipe (7)；The side water inlet (4) is provided with side water inlet pipe (8), the side water inlet pipe (8)
Height is higher than upper water inlet (2).
3. the test device of asphalt infiltration annoyance level according to claim 2, it is characterised in that: described enterprising
Scale is provided on water pipe (7) and side water inlet pipe (8).
4. the test device of asphalt infiltration annoyance level according to claim 2, it is characterised in that: described enterprising
Valve (9) are provided on water pipe (7) and side water inlet pipe (8).
5. a kind of test method of asphalt infiltration annoyance level, uses the drip as described in claim 1-4 any one
The test device of green mixture infiltration annoyance level, it is characterised in that the following steps are included:
Step 1: injecting certain density p from upper water inlet (2)Salt waterSalt water caught after seepage stability from lower outlet (3)
The salt water of exudation measures the volume Q of connect salt water1With time t used1；And calculate the percolation flow velocity v of salt water1=Q1/t1；
Step 2: injecting certain density p from upper water inlet (2)Salt waterSalt water, while from side water inlet (4) inject deionized water,
After seepage stability, the mixing water of exudation is caught from lower outlet (3)；Measure quality m, the volume Q of connect mixing water2With it is used
Time t2；And calculate the interference percolation flow velocity v of salt water2；
Step 3: calculating flow rate-of-change s=[(v1-v2)/v1] × 100% determines that asphalt unidirectionally seeps water by vertical
Direction interconnected pore annoyance level.
6. the test method of asphalt infiltration annoyance level according to claim 5, it is characterised in that: the step
Two mesohalobic interference percolation flow velocity v2Calculation method be
According to ρSalt waterQSalt water+ρWaterQWater=m, QSalt water+QWater=Q2, solve QSalt water=(m- ρWaterQ2)/(ρSalt water-ρWater), by v2=QSalt water/t2Obtain
The speed v that salt water goes out from bottom of device seepage flow when secondary seepage flow2=(m- ρWaterQ2)/[t2(ρSalt water-ρWater)]；
Wherein QSalt waterIndicate Q2The volume of middle brine composition, ρWaterIndicate deionized water density, QWaterIndicate Q2Middle deionized water component
Volume.
7. the test method of asphalt infiltration annoyance level according to claim 6, it is characterised in that: the step
One injects salt water and step 2 from upper water inlet (2) from upper water inlet (2) injection salt water, step 2 infuses from side water inlet (4)
The pressure for entering deionized water is identical.
8. the test method of asphalt infiltration annoyance level according to claim 7, it is characterised in that: the step
Water inlet pipe (7) injects salt water on one from one, and step 2 water inlet pipe (7) from one injects salt water and step 2 from side water inlet pipe
(8) deionized water is injected, liquid is flow automatically by the liquid level in respective pipeline to be injected；
When the step 1 injects salt water from upper water inlet pipe (7), upward water inlet pipe (7) supplement salt water keeps upper water inlet pipe (7)
Liquid level is constant；When step 2 injects salt water from upper water inlet pipe (7) simultaneously and injects deionized water from side water inlet pipe (8), to
Upper water inlet pipe (7) supplement salt water keeps the liquid level of upper water inlet pipe (7) constant, protects to side water inlet pipe (8) supplement deionized water
The liquid level for holding side water inlet pipe (8) is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910106930.8A CN109668817B (en) | 2019-02-02 | 2019-02-02 | Testing device and testing method for water seepage interference degree of asphalt mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910106930.8A CN109668817B (en) | 2019-02-02 | 2019-02-02 | Testing device and testing method for water seepage interference degree of asphalt mixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109668817A true CN109668817A (en) | 2019-04-23 |
| CN109668817B CN109668817B (en) | 2021-06-15 |
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ID=66151146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910106930.8A Active CN109668817B (en) | 2019-02-02 | 2019-02-02 | Testing device and testing method for water seepage interference degree of asphalt mixture |
Country Status (1)
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| CN (1) | CN109668817B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546526A (en) * | 2016-11-25 | 2017-03-29 | 太原理工大学 | Multidimensional gas permeability measurement instrument and measuring method |
| CN108507930A (en) * | 2018-06-21 | 2018-09-07 | 天津大学 | Directly measure the experimental rig of three-dimensional infiltration coefficient under bury difference consolidation pressure |
-
2019
- 2019-02-02 CN CN201910106930.8A patent/CN109668817B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546526A (en) * | 2016-11-25 | 2017-03-29 | 太原理工大学 | Multidimensional gas permeability measurement instrument and measuring method |
| CN108507930A (en) * | 2018-06-21 | 2018-09-07 | 天津大学 | Directly measure the experimental rig of three-dimensional infiltration coefficient under bury difference consolidation pressure |
Non-Patent Citations (1)
| Title |
|---|
| JUN CHEN ET AL.: "《Laboratory characterization of directional ependence of permeability for porous asphalt mixtures》", 《MATERIALS AND STRUCTURES》 * |
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| CN109668817B (en) | 2021-06-15 |
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