CN207051158U - A kind of permeation coefficient of permeable concrete determines device - Google Patents
A kind of permeation coefficient of permeable concrete determines device Download PDFInfo
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- CN207051158U CN207051158U CN201720959689.XU CN201720959689U CN207051158U CN 207051158 U CN207051158 U CN 207051158U CN 201720959689 U CN201720959689 U CN 201720959689U CN 207051158 U CN207051158 U CN 207051158U
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Abstract
The utility model discloses a kind of permeation coefficient of permeable concrete to determine device, it is mainly made up of lid of holding one's breath, the water tank of upper end open, sealing ring, head stable pipe, soft seal sleeve and bearing, and the lower end for lid of holding one's breath is tightly connected to form inner chamber by the upper end of sealing ring and water tank；Bearing, test block, the stable pipe of head and soft seal sleeve form test block component and are placed in water tank, gap is provided with the upper end of the stable pipe of head, the upper end of the water tank is provided with seepage mouth, this seepage mouth is connected with the soakaway trench connected with inner chamber, soakaway trench, which is provided with, to be used to control the logical infiltration valve closed of soakaway trench and the flowmeter of the water-carrying capacity for detecting soakaway trench, the hold one's breath upper end of lid is provided with bleeding point and water filling port, bleeding point, which is provided with, to be used to control the logical evacuating valve closed of bleeding point, and water filling port, which is provided with, to be used to control the logical Water filling valve closed of water filling port.The utility model is integrated with the full water pretreatment function of vacuum, can reduce error caused by gas in test block, so that result is more accurate reliable.
Description
Technical field
It the utility model is related to test device, and in particular to a kind of permeation coefficient of permeable concrete determines device.
Background technology
Contain a large amount of interconnected pores inside pervious concrete, compared to conventional densification pavement material, it is mainly characterized by
Water, permeability are excellent.Pervious concrete can increase the rainwater for penetrating into earth's surface, the level of ground water for alleviating city drastically declines,
A series of Urban Environmental Problems such as setting of ground；Meanwhile again be conservation of nature, maintaining ecological balance, alleviate urban heat land effect
Excellent pavement material；Moreover, it is advantageous to the benign development of environment for human survival, prevent in urban rainwater management with water pollution
Control etc. in work, it may have special significance.Pervious concrete is a kind of green building material, is meeting the same of pavement performance
When, and can and natural environment coordinated growth, comfortable living environment is constructed for the mankind, it as a kind of environmental environment-friendly concrete,
The sustainable development idea of " with Harmonizing with Environment " is embodied well.
Coefficient of permeability is to evaluate the good and bad important indicator of pervious concrete water permeability.At present, the country is on permeable coagulation
The measure Main Basiss professional standard CJJ/T 135-2009 of native coefficient of permeability《Water-permeable cement concrete pavement technique code》In
Described road surface coefficient of permeability method of testing, this process employs the principle of constant head test method, suitable for measure water penetration compared with
The permeability parameters of big material, and require to carry out the full water pretreatment of vacuum before coefficient of permeability is tested, specific requirement is will examination
Part places 30min under (90 ± 1) kPa, while vacuum is kept, adds enough water to 100mm at the top of sample is not crossed, stops
Only vacuumize, soak 20min.The purpose of the full water pretreatment of vacuum is the influence for eliminating test specimen internal gas, so that result
It is more true, accurate.The standard provides the principle of permeation coefficient of permeable concrete test and requirement, but in test device side
Face, there has been no the standard set-up of measure permeation coefficient of permeable concrete in China.
Test block is inserted in by the concrete permeable factor detection device of Publication No. 201610305628.1, the measure device
Cylinder mould, and space is filled with wax and plasticine, practical operation is more difficult, and is inconvenient to dismantle.Publication No.
201310218787.4 water-permeable cement concrete device for testing permeability coefficient, described measure device are sealed using three petals
Test block, but essence is still rigid die and rigid specimen coordinates, sealing is difficult to ensure that, and install, demounting procedure it is also more numerous
It is trivial.The function of water pretreatment moreover, the vacuum that apparatus above does not possess required by CJJ/T 135-2009 standards is satisfied.
Utility model content
The purpose of this utility model is to overcome above the shortcomings of the prior art, there is provided it is a kind of it is simple in construction,
Rationally, reliable and stable, simple operation and accuracy it is high permeation coefficient of permeable concrete measure device.
The purpose of this utility model is realized by following technical scheme：This permeation coefficient of permeable concrete determines device,
It is described to hold one's breath under lid including lid of holding one's breath, the water tank of upper end open, sealing ring, head stable pipe, soft seal sleeve and bearing
End is tightly connected by the upper end of sealing ring and water tank, and lid, sealing ring and the water tank of holding one's breath forms inner chamber together；The branch
Seating is in water tank, and the upper end of the bearing is supported with test block to be measured, the lower end of the stable pipe of the head and test block it is upper
End connection, the middle part socket test block of the soft seal sleeve, the stable pipe of upper end set connecting waterhead of the soft seal sleeve
Lower end, the upper end of the lower end connects bearing of the soft seal sleeve；The upper end of the stable pipe of the head is provided with gap, described
The upper end of water tank is provided with seepage mouth, and the distance between the lower edge of this seepage mouth and the inner bottom surface of water tank are more than bearing and test block
Height sum；The seepage mouth is connected with the soakaway trench connected with inner chamber, and the soakaway trench is provided with and is used to control soakaway trench to lead to
The infiltration valve and the flowmeter of the water-carrying capacity for detecting soakaway trench closed, the upper end of the lid of holding one's breath are provided with bleeding point and water filling
Mouthful, and the bleeding point is provided with and is used to control the logical evacuating valve closed of bleeding point, the water filling port, which is provided with, to be used to control water filling port
The logical Water filling valve closed.
Preferably, in the vertical direction, the distance between the lower edge of the seepage mouth and the top surface of test block are more than 30mm.
Preferably, petrolatum layer is provided between the soft seal sleeve and test block.
Preferably, the wall thickness of the lid of holding one's breath is more than 15mm, and the wall thickness of the water tank is more than 15mm.
Preferably, the internal diameter of the lid of holding one's breath is equal with the internal diameter of water tank, the external diameter of the lid of holding one's breath and the external diameter of water tank
It is equal；Upper connecting groove is provided with above the sealing ring, lower connecting groove is provided with below the sealing ring；And the upper company
The groove width for connecing the groove width lower connecting groove equal with the wall thickness for lid of holding one's breath, described of groove is equal with the wall thickness of water tank；It is described to hold one's breath
Connecting groove and lower connecting groove are inserted in the lower end of lid and the upper end of water tank respectively.
Preferably, the stable Guan Jun of the water tank and head is made of lucite.
Preferably, the internal diameter of the soakaway trench and the internal diameter of gap are all higher than 15mm.
Preferably, the soft seal sleeve and sealing ring are made of silica gel or rubber.
Preferably, the upper end of the lid of holding one's breath is provided with the vacuum meter for being used for detecting inner chamber vacuum.
Preferably, the internal diameter of the external diameter of the stable pipe of the diameter of the test block, the external diameter of bearing, head and soft seal sleeve
It is equal.
The utility model has the following advantages relative to prior art：
1st, measure device of the present utility model is integrated with the full water pretreatment function of vacuum, can reduce gas in test block and cause
Error so that result is more accurate reliable, also more conform to standard requirement.
2nd, the utility model has used the fit system of flexible sleeve and rigid test block, utilizes the elasticity of soft seal sleeve
Deformability, sleeve is brought into close contact with test block, and further sealing effectiveness, installation, dismounting are realized along with vaseline is smeared
Quickly and easily.
3rd, the utility model installs flowmeter additional on soakaway trench, the real-time quantization to experiment infiltration speed is realized, with true
Recognize that whether reaching for situation of being seeped water in detection process is stable, avoid and not yet stable begin to test and obtain error result
Situation.
Brief description of the drawings
Fig. 1 is the structural representation of permeation coefficient of permeable concrete measure device of the present utility model.
Fig. 2 is the enlarged diagram at A in Fig. 1.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Permeation coefficient of permeable concrete measure device as shown in Figure 1, including it is the water tank 2 of lid 1 of holding one's breath, upper end open, close
Seal 3, head stable pipe 4, soft seal sleeve 5 and bearing 6, the lower end of the lid 1 of holding one's breath passes through sealing ring 3 and water tank 2
Upper end is tightly connected, and lid 1 of holding one's breath, sealing ring 3 and the water tank 2 form inner chamber 7 together；The bearing 6 is placed in water tank 2,
And the upper end of the bearing 2 is supported with test block 8 to be measured, the lower end of the stable pipe 4 of the head is connected with the upper end of test block 8, institute
The middle part socket test block 8 of soft seal sleeve 5 is stated, the upper end of the soft seal sleeve 5 covers the lower end of the stable pipe 4 of connecting waterhead,
The upper end of the lower end connects bearing 6 of the soft seal sleeve 5；The upper end of the stable pipe 4 of the head is provided with gap 9, described
The upper end of water tank 2 is provided with seepage mouth 10, and the distance between the lower edge of this seepage mouth 10 and the inner bottom surface of water tank 2 are more than bearing 2
With the height sum of test block 8；The seepage mouth 10 is connected with the soakaway trench 11 connected with inner chamber 7, and the soakaway trench 11 is provided with
For controlling the flowmeter 13 of the logical infiltration valve 12 closed of soakaway trench and the water-carrying capacity for detecting soakaway trench 11, the lid of holding one's breath
1 upper end is provided with bleeding point 14 and water filling port 15, and the bleeding point 14 is provided with and is used to control the logical evacuating valve closed of bleeding point
16, the water filling port 15, which is provided with, to be used to control the logical Water filling valve 17 closed of water filling port.
In the vertical direction, the distance between the lower edge of the seepage mouth 10 and the top surface of test block 8 are more than 30mm.This sets
Put the reliability for further ensuring experiment.
Petrolatum layer is provided between the soft seal sleeve 5 and test block 8.Vaseline can ensure soft seal sleeve 5 with
Compactness between test block 8, the water in the stable pipe 4 of head is avoided to be permeated between soft seal sleeve 5 and test block 8, further
Improve the accuracy of experiment.
The wall thickness of the lid 1 of holding one's breath is more than 15mm, and the wall thickness of the water tank 2 is more than 15mm.Enough thickness ensures to hold one's breath
The intensity of lid 1 and water tank 2, to ensure that the inner chamber 7 being split into can form enough vacuum, make what test job was effective, stablizes to enter
OK.
The internal diameter of the lid 1 of holding one's breath is equal with the internal diameter of water tank 2, the external diameter phase of the external diameter and water tank 2 of the lid 1 of holding one's breath
Deng；Upper connecting groove 18 is provided with above the sealing ring 3, lower connecting groove 19 is provided with below the sealing ring 3；It is and described
The groove width of the groove width of upper connecting groove 18 lower connecting groove 19 equal with the wall thickness for lid 1 of holding one's breath, described and the wall thickness phase of water tank 2
Deng；Connecting groove 18 and lower connecting groove 19 are inserted in the lower end of the lid 1 of holding one's breath and the upper end of water tank 2 respectively.This structure is entered
One step ensure that the sealing effectiveness held one's breath between lid 1 and water tank 2, further to improve the degree of reliability of instrument.
The stable pipe 4 of the water tank 2 and head is made of lucite.This is stable using transparent water tank 2 and head
Pipe 4, laboratory technician is facilitated to observe and measure water level.
The internal diameter of the soakaway trench 11 and the internal diameter of gap 9 are all higher than 15mm.Appropriate size is to ensure test process
Middle current stable equilibrium, further improve the accuracy of measurement result.
The soft seal sleeve 4 and sealing ring 3 are made of silica gel or rubber.This is connected between ensure that each part
Sealing.
The upper end of the lid 1 of holding one's breath is provided with the vacuum meter 20 for being used for detecting inner chamber vacuum.The convenient experiment of vacuum meter 20 is accurate
Really understand the vacuum of inner chamber 7, ensure that experiment is effectively carried out.
The external diameter of the stable pipe 4 of the diameter of the test block 8, the external diameter of bearing 6, head and the internal diameter of soft seal sleeve 5 are equal
It is equal.This is further ensured that the compactness between test block and soft seal sleeve.
Use comprising the following steps that for present apparatus measure permeation coefficient of permeable concrete：
1st, one layer of vaseline is smeared in the inwall of soft seal sleeve 5 and the circumferential wall of test block 8, then test block 8 is inserted in
In soft seal sleeve 5, and slowly it is pushed into the centre position of soft seal sleeve 5.Then by the soft seal sleeve 5 with test block 8
The upper end of bearing 6 is inserted in upper end, and the lower end of the stable pipe 4 of head is inserted in lower end, and is leaned on pipe collar 21 at the both ends of soft seal sleeve 5
Proximal edge position fastens, and is connected to become a test block component.This is simple to operate, ensure that bearing 6, soft close is fixed in test block 8
In the tube chamber that big envelope cylinder 5 and the stable pipe 4 of head are formed.
2 then bearing 6 down, the test block component connected is placed in water tank 2, then the lid 1 of holding one's breath with sealing ring 3
Alignment is positioned on water tank 2, and confirms that sealing ring 3 is completely fitted with the edge of water tank 2；Flexible pipe is reused by bleeding point 14 and air pump
Connect and be connected water filling port 15 with the feed water inlet of water system using flexible pipe.Water system herein can use existing no gas
Water supply system.
3rd, Water filling valve 17 and infiltration valve 12 are closed, keeps evacuating valve 16 to open, booster air pump is true by vacuum meter
Recognize vacuum in device, be evacuated to (90 ± 1) kPa, keep 30min, during which vacuum must not exceed (90 ± 1) kPa；Then
While vacuum is kept, water system and Water filling valve are opened, injects air free water to inner chamber 7；When examination is completely covered in air free water
After block 8, stop vacuumizing, make test block 8 soak 20min in air free water.
4th, flexible pipe is removed, removes lid 1 of holding one's breath, adjusts the position of bearing 6 in water tank 2 and water tank 2, makes the stable pipe 4 of head
Water inlet is directed at the feed water inlet of water system, and gap 9 stretches out water tank 2, to ensure that the air free water that water system provides is complete
Fall and flow into the stable pipe 4 of head, and the water outlet of gap 9 is all flowed out to outside water tank 2；Infiltration valve 12 is opened simultaneously.
5th, water temperature is recorded, the feed water inlet of water system is opened, regulation output to optimum range, observes in the stable pipe of head
Stable level, gap 9 has waterflow stabilization outflow, and during the meter readings of soakaway trench 11 maintenance stabilization, measures head height, i.e.,
The difference in height of the stable pipe 4 of head and water level in water tank 2, take a graduated cylinder to be placed in the lower section of soakaway trench 11 and collect infiltration water, open simultaneously
Open manual time-keeping.During collecting infiltration water, it should confirm that flowmeter without great fluctuation process, otherwise should be tested again.
6th, after a period of time, closing infiltration tube valve, while suspend stopwatch, record water body in stop watch figures and graduated cylinder
Product, off-test.
Experimental data in said process is calculated according to following disclosures.The calculation formula of wherein coefficient of permeability is：
In formula, kT--- the coefficient of permeability (mm/s) when water temperature is T DEG C；
Q --- the water (mm penetrated in second time t3)；
The thickness (mm) of L --- test block；
Top surface area (the mm of A --- test block2)；
H --- head height (mm)；
T --- the time (s).
Due to the penetrating power of the dynamic viscosity capacity water of water, so as to influence the measure of infiltration coefficient, and water is dynamic
The power coefficient of viscosity can change with water temperature, and therefore, the coefficient of permeability under water temperature the same terms just has comparativity.With reference to CJJ/
T 135-2009 standards, using 15 DEG C of water temperatures as normal temperature, the coefficient of permeability reduction formula under normal temperature is：
In formula, k15--- the coefficient of permeability (mm/s) during normal temperature；
ηT--- the coefficient of dynamic viscosity (kPas) of water at T DEG C；
η15--- the coefficient of dynamic viscosity (kPas) of water at 15 DEG C.
After the completion of experiment, unclamp pipe collar and remove, soft seal sleeve is extracted from bearing, the stable pipe of head, taken out
Test block, deposited after instrument is wiped clean.
Above-mentioned embodiment is preferred embodiment of the present utility model, and the utility model can not be defined,
Other any changes made without departing from the technical solution of the utility model or other equivalent substitute modes, are included in
Within the scope of protection of the utility model.
Claims (10)
1. a kind of permeation coefficient of permeable concrete determines device, it is characterised in that：Water tank, close including lid of holding one's breath, upper end open
Seal, head stable pipe, soft seal sleeve and bearing, the lower end of the lid of holding one's breath is sealed by the upper end of sealing ring and water tank
Connection, and lid, sealing ring and the water tank of holding one's breath forms inner chamber together；The bearing is placed in water tank, and the bearing is upper
End is supported with test block to be measured, and the lower end of the stable pipe of the head and the upper end of test block connect, the middle part of the soft seal sleeve
Test block is socketed, the lower end of the stable pipe of upper end set connecting waterhead of the soft seal sleeve, the lower end of the soft seal sleeve connects
Connect the upper end of bearing；The upper end of the stable pipe of the head is provided with gap, and the upper end of the water tank is provided with seepage mouth, this seepage mouth
Lower edge and the distance between the inner bottom surface of water tank be more than the height sum of bearing and test block；The seepage mouth be connected with it is interior
The soakaway trench of chamber connection, and the soakaway trench is provided with and is used to control the logical infiltration valve closed of soakaway trench and for detecting in soakaway trench
The flowmeter of water-carrying capacity, the upper end of the lid of holding one's breath is provided with bleeding point and water filling port, and the bleeding point is provided with and taken out for control
The logical evacuating valve closed of gas port, the water filling port, which is provided with, to be used to control the logical Water filling valve closed of water filling port.
2. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：In the vertical direction,
The distance between the lower edge of the seepage mouth and the top surface of test block are more than 30mm.
3. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The soft seal set
Petrolatum layer is provided between cylinder and test block.
4. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The wall of the lid of holding one's breath
Thickness is more than 15mm, and the wall thickness of the water tank is more than 15mm.
5. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The lid of holding one's breath it is interior
Footpath is equal with the internal diameter of water tank, and the external diameter of the lid of holding one's breath is equal with the external diameter of water tank；Upper company is provided with above the sealing ring
Groove is connect, lower connecting groove is provided with below the sealing ring；And the groove width of the upper connecting groove and the wall thickness phase for lid of holding one's breath
Groove width Deng, the lower connecting groove is equal with the wall thickness of water tank；The lower end of the lid of holding one's breath and the upper end of water tank are inserted respectively
Upper connecting groove and lower connecting groove.
6. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The water tank and head
Stable Guan Jun is made of lucite.
7. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The soakaway trench it is interior
The internal diameter of footpath and gap is all higher than 15mm.
8. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The soft seal set
Cylinder and sealing ring are made of silica gel or rubber.
9. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The lid of holding one's breath it is upper
End is provided with the vacuum meter for being used for detecting inner chamber vacuum.
10. permeation coefficient of permeable concrete according to claim 1 determines device, it is characterised in that：The test block it is straight
Stably the external diameter of pipe and the internal diameter of soft seal sleeve are equal for footpath, the external diameter of bearing, head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720959689.XU CN207051158U (en) | 2017-08-02 | 2017-08-02 | A kind of permeation coefficient of permeable concrete determines device |
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| CN201720959689.XU CN207051158U (en) | 2017-08-02 | 2017-08-02 | A kind of permeation coefficient of permeable concrete determines device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116430916A (en) * | 2023-06-08 | 2023-07-14 | 北京科技大学 | Device for accurately controlling small cavity gas pressure based on permeation method and testing method |
-
2017
- 2017-08-02 CN CN201720959689.XU patent/CN207051158U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116430916A (en) * | 2023-06-08 | 2023-07-14 | 北京科技大学 | Device for accurately controlling small cavity gas pressure based on permeation method and testing method |
| CN116430916B (en) * | 2023-06-08 | 2023-09-29 | 北京科技大学 | Device for accurately controlling small cavity gas pressure based on permeation method and testing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Concrete that permeates water coefficient measurement device that permeates water Effective date of registration: 20191125 Granted publication date: 20180227 Pledgee: Bank of China Limited Guangzhou Development Zone Branch Pledgor: Guangzhou Building Materials Institute Limited Company Registration number: Y2019440000213 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201215 Granted publication date: 20180227 Pledgee: Bank of China Limited Guangzhou Development Zone Branch Pledgor: GUANGZHOU BUILDING MATERIALS INSTITUTE Ltd. Registration number: Y2019440000213 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |