CN210427302U - Permeable concrete permeability coefficient testing device - Google Patents
Permeable concrete permeability coefficient testing device Download PDFInfo
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- CN210427302U CN210427302U CN201921356171.2U CN201921356171U CN210427302U CN 210427302 U CN210427302 U CN 210427302U CN 201921356171 U CN201921356171 U CN 201921356171U CN 210427302 U CN210427302 U CN 210427302U
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Abstract
The utility model relates to a permeable concrete permeability coefficient testing device, in particular to the technical field of permeability detection, which comprises a water tank, a mould and a water storage pipe, wherein a supporting cylinder is vertically fixed on the bottom wall of the water tank, and the side wall of the supporting cylinder is provided with a first control valve; one end of the mould is in threaded connection with the supporting cylinder, and the other end of the mould is in threaded connection with the water storage pipe; the water storage pipe is provided with a first overflow pipe far away from the threaded connection end, and the side wall of the water tank is provided with a second overflow pipe; the water storage pipe is internally connected with a piston plate which can slide relatively and is sealed, the piston plate is connected with a water inlet pipe and an exhaust pipe, the water inlet pipe is provided with a control valve II, and the exhaust pipe is provided with a control valve III. The utility model discloses can realize directly carrying out the survey of coefficient of permeating water after the mould evacuation process to being equipped with the sample, reduce the error that the mould shifts and bring, the testing result is more accurate.
Description
Technical Field
The utility model belongs to the technical field of the water permeability detects, concretely relates to concrete water permeability coefficient testing arrangement permeates water.
Background
The pervious concrete is also called porous concrete, and is a porous light concrete mixed by aggregate, cement and water, and its internal structure is a cellular structure with uniformly distributed holes, so that it has the characteristics of pervious and pervious to air. The pervious cement concrete is particularly suitable for being used on the ground and the road surface of urban parks, residential districts, industrial parks, stadiums, schools, hospitals, parking lots and the like. The water permeability coefficient is an important index for evaluating the water permeability of the pervious concrete.
At present, the common method for detecting the water permeability of concrete is as follows: and putting the solidified sample into a vacuum device, vacuumizing to (90 soil 1) KPa, keeping the vacuum state for 30min, adding enough water to cover the sample and enable the water level to be 100mm higher than the sample while keeping the vacuum state, stopping vacuumizing, taking out the sample after soaking for 20min, putting the sample into a water permeability coefficient testing device, and connecting and sealing the sample and a water permeable cylinder. Putting into overflow water tank, opening water supply valve to make no steam water enter into container, adjusting water inflow when water flows out from overflow hole of overflow water tank, making water permeable cylinder maintain certain water level (about 150mm), after the water flow of overflow port of overflow water tank and overflow port of water permeable cylinder is stable, using cylinder to receive water from water outlet, recording water flow (Q) flowing out for 5min, measuring for 3 times, and averaging. The difference (H) between the water level of the water permeable cylinder and the water level of the overflow water tank is measured by a steel ruler to be accurate to 1 mm. The temperature (T) of the water in the overflow sump of the test was measured with a thermometer to the nearest 0.5 ℃. Then according to the formula: k is a radical ofTCalculation of = QL/AHt, where kTThe water permeability coefficient (mm/s) of the sample at the water temperature of T ℃; q is the amount of water (mm) that seeps out in time t seconds; l is the thickness (mm) of the sample; a is the upper surface area (mm) of the sample2) (ii) a H is the water head difference (mm); t is time(s). The test results are expressed as the average of 3 samples, calculated to the nearest 1.0X 10-2mm/s。
The prior Chinese utility model patent with the granted publication number of CN208109657U discloses a concrete water permeability detection device, which comprises an upper barrel, a bracket and a water tank, wherein the side wall of the upper barrel is provided with scales and a first overflow pipe, the bracket is fixed on the bottom surface of the water tank, and the side surface of the bracket is provided with a through hole; the side wall of the water tank is provided with a second overflow pipe, the pipe orifice of the second overflow pipe is connected with a measuring cylinder, the water tank also comprises a hollow openable and closable annular cylindrical mold, the mold is provided with a detachable bottom cover, and the upper cylinder, the mold for detaching the bottom cover and the support are tightly connected from top to bottom; the inner wall of the mould is adhered with a layer of rubber layer. The mould of the device has the functions of concrete forming and sealing clamp, and the concrete sample is directly formed in the mould and is arranged in the device together with the mould for measurement.
The device has simplified the operating procedure, has avoided too much artificial operation to the influence of concrete sample lateral wall leakproofness, has improved the accuracy of testing result, but the mould that is equipped with the shaping concrete sample need put into the vacuum apparatus evacuation of establishing in addition after, puts into the mould again and carries out the detection of water permeability among the detection device, the mould that is equipped with the sample is air suction once more likely in the transfer process, brings experimental error, influences the test result, consequently need propose a new scheme and solve this problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a concrete permeability coefficient testing arrangement permeates water, the mould that is equipped with the sample directly takes out the vacuum and carries out the water permeability test, has reduced the outer error of reason that the mould shifts and brings for the testing result is more accurate.
The above object of the present invention can be achieved by the following technical solutions:
a permeable coefficient testing device for permeable concrete comprises a water tank, a mold and a water storage pipe, wherein a supporting cylinder is vertically fixed on the bottom wall of the water tank, and a first control valve is arranged on the side wall of the supporting cylinder; one end of the mould is in threaded connection with the supporting cylinder, and the other end of the mould is in threaded connection with the water storage pipe; the water storage pipe is provided with a first overflow pipe far away from the threaded connection end, and the side wall of the water tank is provided with a second overflow pipe; the water storage pipe is internally connected with a piston plate which can slide relatively and is sealed, the piston plate is connected with a water inlet pipe and an exhaust pipe, the water inlet pipe is provided with a control valve II, and the exhaust pipe is provided with a control valve III.
Through the technical scheme, the concrete sample can be formed in the mold, the influence of excessive manual operation on the side wall sealing performance of the concrete sample is avoided, the detection result is more accurate, the control valve I and the control valve II are closed, the vacuum device is externally connected with the exhaust pipe, the control valve III is opened, the vacuum treatment can be carried out on the sample, then the control valve II on the water inlet pipe is opened while the vacuum is kept, water is injected into the water storage pipe to a certain height through the water inlet pipe, the sample is submerged, after the sample is treated to meet the test requirement, the vacuum device is closed, water is continuously injected into the upper barrel, the control valve I is opened, water in the water storage pipe flows into the water tank, when water flows out from the overflow pipe I and the overflow pipe II, the water inflow is adjusted, the upper barrel keeps a certain water level, after the water flows from the overflow pipe I and the overflow pipe II are stable, the water is collected from the outlet of the, the device realizes the integrated operation of vacuumizing treatment and water permeability coefficient measurement of the sample, reduces the transfer times of the mould, and ensures that the measurement result is more accurate and the detection is more convenient.
The utility model discloses further set up to: the water inlet pipe is a hard water pipe.
Through adopting above-mentioned technical scheme, can push the piston board into the retaining pipe through promoting the inlet tube, make the piston board move to an overflow pipe open-ended below, make the retaining pipe of sample top sealed for carry out evacuation treatment to the sample and can implement.
The utility model discloses further set up to: the water storage pipe is a round pipe made of high-pressure-resistant transparent materials.
Through the technical scheme, the water storage pipe can bear the pressure during vacuumizing treatment, the vacuumizing treatment of the sample is guaranteed, and meanwhile, the height of water injection can be seen on the water storage pipe, so that the test operation meets the test requirement.
The utility model discloses further set up to: the side wall of the water storage pipe is provided with scales along a generatrix.
Through above-mentioned technical scheme, be convenient for confirm the water yield that adds in the water storage pipe, make the experiment can strictly carry out according to the test standard.
The utility model discloses further set up to: the bottom end opening of the water storage pipe is abutted to the top opening of the supporting cylinder, and the water storage pipe and the supporting cylinder together enable the mold to be tightly sleeved inside.
Through the technical scheme, the mould which is provided with the sample is completely sleeved in the water storage pipe and the supporting cylinder, the mould is better sealed all around, injected water is guaranteed to pass through the upper surface and the lower surface of the sample as far as possible, and the sample is not passed through all around, so that the detection result is more accurate, and meanwhile, the mould is sealed in the water storage pipe and the supporting cylinder, so that a more closed space is created, and the sample is convenient to vacuumize.
The utility model discloses further set up to: and a sealing ring is arranged on the circumferential edge in the piston plate.
Through above-mentioned technical scheme, it is sealed with the piston plate opening better, has built sealed environment, is convenient for handle the sample evacuation.
The utility model discloses further set up to: and rubber layers are attached to the periphery of the inner wall of the mold.
Through the technical scheme, the periphery of the sample is sealed, the injected water is reduced from passing through the periphery of the sample, and the injected water is ensured to pass through the upper surface and the lower surface of the sample as far as possible, so that the test result is more accurate.
The utility model discloses further set up to: the mold is of a split structure.
By adopting the technical scheme, the test sample is convenient to disassemble and replace, is convenient for detecting different test samples, and is convenient for recycling the die.
To sum up, the utility model discloses a beneficial technological effect does:
1. the method can realize the direct determination of the water permeability coefficient after the vacuum pumping treatment of the mould with the sample, reduce the possibility that the mould sucks air again in the transferring process, reduce the error caused by the mould transferring and ensure that the detection result is more accurate;
2. the vacuum pumping treatment and the determination of the water permeability coefficient can be operated on the device, so that the operation is simplified, the times of device configuration and sample disassembly are reduced, and the operation is simpler and more convenient;
3. people only need to inject the sample into the die for forming, and people do not directly contact the sample any more in subsequent operation, so that errors caused by manual operation are reduced, and the detection accuracy is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing the arrangement on the sealing cap;
fig. 3 is an overall schematic view of the mold.
Reference numerals: 1. a water storage pipe; 11. a first overflow pipe; 2. a water tank; 21. a support cylinder; 211. a first control valve; 22. an overflow pipe II; 3. a mold; 31. a rubber layer; 4. a measuring cylinder; 5. a piston plate; 51. a water inlet pipe; 511. a second control valve; 52. an air exhaust pipe; 521. a third control valve; 6. and (4) sampling.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A permeable concrete permeability coefficient testing device is shown in figures 1 and 2 and comprises a water tank 2, a mould 3 and a water storage pipe 1, wherein a supporting cylinder 21 is vertically fixed on the bottom wall of the water tank 2, and a first control valve 211 is arranged on the side wall of the supporting cylinder 21; one end of the mould 3 provided with the sample 6 is in threaded connection with the supporting cylinder 21, and the other end of the mould 3 is in threaded connection with the water storage pipe 1; an overflow pipe I11 is arranged on the water storage pipe 1 far away from the threaded connection end, and an overflow pipe II 22 is arranged on the side wall of the water tank 2 close to the open end; the water storage pipe 1 is internally connected with a piston plate 5, the piston plate 5 and the water storage pipe 1 slide relatively and are sealed, the piston plate 5 is connected with a water inlet pipe 51 and an air exhaust pipe 52, the water inlet pipe 51 is provided with a second control valve 511, and the air exhaust pipe 52 is provided with a third control valve 521.
The water storage pipe 1 is made of high-pressure-resistant transparent materials, such as high-pressure-resistant glass, the section of the water storage pipe 1 is rectangular, and scales are arranged on the side wall of the water storage pipe, so that the water injection amount can be conveniently determined; the piston plate 5 is made of high-pressure-resistant materials, such as steel plates, and the inner wall of the piston plate 5 is provided with a sealing ring along the circumferential edge, so that the upper end of the water storage pipe 1 can be better sealed. The water inlet pipe 51 is preferably a hard water pipe, which can push the water inlet pipe 51 to move the piston plate 5, the water inlet pipe 51 is externally connected with a water source to inject water into the water storage pipe 1, and the air exhaust pipe 52 is externally connected with a vacuum device to vacuumize the water storage pipe 1.
The supporting cylinder 21 is vertically fixed on the bottom wall of the water tank 2, the supporting cylinder 21 is made of high-pressure-resistant materials, such as high-pressure-resistant glass, the supporting cylinder 21 is a cylinder with an upper opening and a hollow inner part, when the control valve I211 is opened, water in the water storage pipe 1 can flow into the water tank 2, the opening section diameter of the supporting cylinder 21 is the same as that of the water storage pipe 1, one end, away from the overflow pipe 11, of the water storage pipe 1 is in threaded connection with the mold 3, and one end, away from the bottom wall of the water tank 2, of the supporting cylinder 21 is in threaded connection.
As shown in fig. 3, the mould 3 is of a split construction, and the mould 3 is provided with a removable bottom cover (not shown) in order to enable the concrete sample to be formed in the mould 3. The bottom of water storage pipe 1 and the top butt of a support section of thick bamboo 21, water storage pipe 1 and a support section of thick bamboo 21 are together with the inseparable cover of mould 3 inside, seal mould 3 all around better, be convenient for carry out evacuation treatment and reduced the possibility that water passes through all around from mould 3 as far as possible to the sample in the mould 3. In order to ensure that water only passes through the upper surface and the lower surface of the sample 6 as much as possible during detection and reduce the flow of water along the gap of the inner wall of the mold 3, a rubber layer 31 is adhered to the inner wall of the mold 3 to seal the periphery of the sample 6.
The operating principle of the permeable concrete permeability coefficient testing device is as follows:
the concrete sample 6 is prepared and molded in the mold 3 and used for water permeability detection, then the bottom cover of the mold 3 is taken down, the mold 3, the water storage pipe 1 and the supporting cylinder 21 are connected in a threaded mode, the first control valve 211 on the side wall of the supporting cylinder 21 is closed, the third control valve 521 on the air exhaust pipe 52 is opened, the second control valve 511 on the water inlet pipe 51 is closed, the third control valve 521 is externally connected with a vacuum device, then the piston plate 5 is pushed to be more than 100mm away from the upper surface of the sample 6, and the upper end of the water storage pipe 1 is sealed. Starting a vacuum device, vacuumizing the space where the sample 6 is located to 90 soil 1kPa, keeping the vacuum state for 30min, opening a second control valve 511 while keeping the vacuum state, injecting water into the water storage pipe 1 through a water inlet pipe 51, adding enough water to cover the sample and enable the water level to be higher than the concrete sample by 100mm, stopping vacuumizing, soaking the sample 6 for 20min, pulling the water inlet pipe 51 to enable a piston plate 5 to move to the opening of the water storage pipe 1, enabling the position where the piston plate 5 is located to be higher than the highest point of a first overflow pipe 11, opening the second control valve 511 to inject water into the water storage pipe 1, simultaneously opening a first control valve 211 on the side wall of a support cylinder 21 to enable the water in the water storage pipe 1 to flow into a water tank 2, and then carrying out detection and calculation according to a standard measuring method.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a concrete permeability coefficient testing arrangement permeates water, includes basin (2), mould (3) and retaining pipe (1), its characterized in that: a supporting cylinder (21) is vertically fixed on the bottom wall of the water tank (2), and a first control valve (211) is arranged on the side wall of the supporting cylinder (21); one end of the mold (3) is in threaded connection with the supporting cylinder (21), and the other end of the mold (3) is in threaded connection with the water storage pipe (1); an overflow pipe I (11) is arranged on the water storage pipe (1) far away from the threaded connection end, and an overflow pipe II (22) is arranged on the side wall of the water tank (2); the water storage device is characterized in that a piston plate (5) capable of sliding relatively and sealed is connected in the water storage pipe (1), a water inlet pipe (51) and an air exhaust pipe (52) are connected on the piston plate (5), a second control valve (511) is arranged on the water inlet pipe (51), and a third control valve (521) is arranged on the air exhaust pipe (52).
2. The pervious concrete permeability coefficient testing device of claim 1, characterized in that: the water inlet pipe (51) is a hard water pipe.
3. The pervious concrete permeability coefficient testing device of claim 1, characterized in that: the water storage pipe (1) is a round pipe made of high-pressure-resistant transparent materials.
4. The pervious concrete permeability coefficient testing device of claim 3, characterized in that: the side wall of the water storage pipe (1) is provided with scales along a generatrix.
5. The pervious concrete permeability coefficient testing device of claim 1, characterized in that: the bottom end opening of the water storage pipe (1) is abutted with the top opening of the supporting cylinder (21), and the water storage pipe (1) and the supporting cylinder (21) together tightly sleeve the mold (3) inside.
6. The pervious concrete permeability coefficient testing device of claim 1, characterized in that: and a sealing ring is arranged on the inner wall of the piston plate (5) along the circumferential edge.
7. The pervious concrete permeability coefficient testing device of claim 1, characterized in that: the periphery of the inner wall of the die (3) is provided with a rubber layer (31) in a fitting manner.
8. The pervious concrete permeability coefficient testing device of claim 7, characterized in that: the mould (3) is of a split structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356171.2U CN210427302U (en) | 2019-08-20 | 2019-08-20 | Permeable concrete permeability coefficient testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356171.2U CN210427302U (en) | 2019-08-20 | 2019-08-20 | Permeable concrete permeability coefficient testing device |
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| CN210427302U true CN210427302U (en) | 2020-04-28 |
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| CN201921356171.2U Active CN210427302U (en) | 2019-08-20 | 2019-08-20 | Permeable concrete permeability coefficient testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147054A (en) * | 2020-09-25 | 2020-12-29 | 青岛路桥建设集团有限公司 | Rapid test method for matrix communication porosity of semi-flexible pavement |
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2019
- 2019-08-20 CN CN201921356171.2U patent/CN210427302U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147054A (en) * | 2020-09-25 | 2020-12-29 | 青岛路桥建设集团有限公司 | Rapid test method for matrix communication porosity of semi-flexible pavement |
| CN112147054B (en) * | 2020-09-25 | 2023-02-28 | 青岛路桥建设集团有限公司 | Rapid test method for matrix communication porosity of semi-flexible pavement |
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