CN210626270U - Device for rapidly determining permeability coefficient of pervious concrete - Google Patents
Device for rapidly determining permeability coefficient of pervious concrete Download PDFInfo
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- CN210626270U CN210626270U CN201921177682.8U CN201921177682U CN210626270U CN 210626270 U CN210626270 U CN 210626270U CN 201921177682 U CN201921177682 U CN 201921177682U CN 210626270 U CN210626270 U CN 210626270U
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Abstract
The utility model provides a device of rapid survey concrete permeability coefficient that permeates water belongs to building material technical field. Including the water storage storehouse, concrete sample permeates water, detects storehouse and flowmeter: the water storage bin is of a hollow transparent structure with a sealing end at the bottom; the pervious concrete sample is positioned at the bottom of the water storage bin; the detection bin comprises a buffer bin and an observation bin communicated with the buffer bin, and the buffer bin is positioned at the bottom of the pervious concrete sample; the buffer bin is of an L-shaped hollow transparent structure with a sealing end at the top, the observation bin is of a hollow transparent structure, and a water outlet is formed in the buffer bin; the flowmeter is installed on the water outlet. The utility model discloses according to U type pipe principle, avoid the influence of water head to be zero at the pressure differential, avoid under the condition of time error and unit weight reading error, survey the concrete coefficient of permeability truth that permeates water, the characteristic of its ability of permeating water of sign improves the accuracy of detected value.
Description
Technical Field
The utility model belongs to the technical field of building material, specifically be a device of rapid survey concrete permeability coefficient that permeates water.
Background
The pervious concrete is a material with an internal structure formed by a skeleton formed by a series of porous structures communicated with external air, has good water permeability compared with a hardened pavement, has unique advantages in the aspects of creating good physical and ecological environments such as sound, light and heat, embodies the concept of 'symbiosis with the environment', and is also a main building material for the construction of 'sponge cities'.
The pervious concrete belongs to the dry and hard concrete, and the water permeability of the pervious concrete is the most important performance index of the pervious concrete; the existing device and method for testing the water permeability coefficient of the pervious concrete refer to the requirements and regulations in JCT945-2005 pervious brick industry standards, the influence of unbalanced pressure on the accuracy of the water permeability coefficient exists due to the fact that the water level is reduced or the water level difference exists in the testing process, time errors and metering errors exist in the testing value, and real detection of the water permeability coefficient of the pervious concrete can be achieved on the premise that the external atmospheric pressure is kept balanced all the time under the realistic simulation condition.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device of rapid survey concrete permeability coefficient of permeating water. Through the U-shaped pipe principle, the influence of external atmospheric pressure on the water permeability coefficient in the test process is avoided, the water permeability coefficient of the test sample is measured through real-time adjustment of the flowmeter, and the accuracy of the detection value is improved.
The utility model discloses the purpose is realized through following technical scheme:
the utility model provides a device of rapid survey concrete permeability coefficient that permeates water, includes the water storage storehouse, the concrete sample that permeates water detects storehouse and flowmeter:
the water storage bin is of a hollow transparent structure with a sealing end at the bottom;
the pervious concrete sample is positioned at the bottom of the water storage bin;
the detection bin comprises a buffer bin and an observation bin communicated with the buffer bin, and the buffer bin is positioned at the bottom of the pervious concrete sample; the buffer bin is of an L-shaped hollow transparent structure with a sealing end at the top, the observation bin is of a hollow transparent structure, and a water outlet is formed in the buffer bin;
the flowmeter is installed on the water outlet.
In the device of the utility model, the water storage bin is used for storing water before testing, so as to ensure that sufficient water exists in the testing process; the buffer bin is arranged to be in an L-shaped structure and mainly provides a section of non-detection range, when water passes through the non-detection range, the flow is uniform and stable, and the clearness of a data acquisition end point in the detection process is ensured; the flowmeter is used for accurately and quickly recording the flow speed and ensuring the accuracy of test data.
Further, the sealing end is made of elastic rubber.
Furthermore, the pervious concrete sample is square, and sealing layers are arranged on the front, the back, the left and the right of the pervious concrete sample. The sealing layers are arranged on the front, the rear, the left and the right of the pervious concrete sample, and are used for sealing the four surfaces, so that water only penetrates through the concrete sample from the upper surface to the lower surface during testing, and the measuring accuracy is improved.
Further, the sealing layer is a cement layer.
Further, the water storage bin and the observation bin are cuboid hollow transparent structures. Wherein the side length of the bottom surface of the water storage bin can be 95-195 mm, and the height of the bottom surface of the water storage bin is 700 +/-5 mm; the side length of the bottom surface of the observation bin is 50 +/-2 mm, and the height of the bottom surface of the observation bin is 900 +/-5 mm. The water storage bin and the observation bin can also be preferably in other structures as long as the purpose of measurement and observation can be achieved.
The surge bin is L type structure, and its one end of being connected with the concrete sample that permeates water is short right angle limit, and the one end of being connected with the observation storehouse is long right angle limit, and short right angle limit and long right angle limit are cuboid cavity transparent structure, and wherein, the bottom surface length of side of short right angle limit is 95 ~ 195mm, highly is 100mm, and the bottom surface length of side of long right angle limit is 100mm, highly is 150 ~ 200 mm.
Further, the material in water storage storehouse, surge bin, observation storehouse is colorless transparent ya keli or glass, and its thickness is 5 ~ 10 mm.
Furthermore, the precision of the flowmeter is 1-2 ml/s, and the measurement range is 0-1500 ml/s.
The method for measuring the permeability coefficient of the pervious concrete by adopting the device comprises the following steps:
1) coating sealing materials on the front, the back, the left and the right of the pervious concrete sample to form sealing layers, wherein the area of the pervious surface of the pervious concrete sample is the area A (mm) of the bottom surface2)；
2) Placing the sealed permeable concrete sample on the sealing end of the buffer bin, placing the sealing end of the water storage bin on the permeable concrete sample, and properly adjusting to ensure the sealing property of the contact end;
3) closing the flow meter, injecting water from the observation bin, stopping injecting water when tap water is injected to 4/5-5/6 parts of the water storage bin, and standing until the water level of the observation bin is flush with the water level of the water storage bin;
4) opening the flowmeter, and adjusting the flowmeter until the water level drop rate of the observation bin is consistent with that of the water storage bin, wherein the flow of the flowmeter is the water permeability coefficient characteristic value M (ml/s) of the permeable concrete sample;
5) and the water permeability coefficient of the pervious concrete is M/A (mm/s).
Further, in step 4), the flow rate is adjusted by the size.
The utility model discloses according to U type pipe principle, avoid the influence of water head to under the condition that the pressure differential is zero, avoid time error and volume weight reading error, survey the concrete coefficient true value that permeates water, characterize its characteristic of ability of permeating water; the accuracy of the detection value is improved, a device for scientifically and accurately evaluating the permeability coefficient of the pervious concrete is provided, and a pervious concrete performance test system is perfected and enriched.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses the device of survey pervious concrete coefficient of permeability can avoid the influence of water head, reading error and time error to test data, introduces flowmeter and U type pipe principle, provides the device of scientific accurate evaluation pervious concrete coefficient of permeability, perfects and enriches pervious concrete performance test system;
2. the device for measuring the permeability coefficient of the pervious concrete has no requirements on temperature, liquid medium and the like, and can be used for simulating the plugging process of the pervious concrete and improving the performance of the pervious concrete;
3. utilize the utility model discloses the device is surveyed the concrete water permeability that permeates water, its easy operation, accurate, bright, does not have loaded down with trivial details operation, and the judgement that can be more accurate in the short time permeates water concrete coefficient truth.
Drawings
Fig. 1 is the utility model discloses rapid survey concrete water permeability coefficient device's schematic structure diagram.
Fig. 2 is the utility model discloses rapid survey concrete water permeability coefficient device's reservoir structure schematic diagram.
FIG. 3 is the structural intention of the detection chamber of the device for rapidly measuring the permeability coefficient of pervious concrete of the utility model;
reference numerals: 1-water storage bin, 11-sealing end, 2-detection bin, 21-buffer bin, 211-sealing end, 22-observation bin, 23-water outlet, 3-pervious concrete sample and 4-flowmeter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The device for rapidly determining the permeability coefficient of the pervious concrete of the embodiment is shown in fig. 1, fig. 2 and fig. 3, and comprises a water storage bin 1, a pervious concrete sample 3, a detection bin 2 and a flowmeter 4; the water storage bin 1 is of a hollow transparent structure with a sealing end 11 at the bottom; the pervious concrete sample 3 is positioned at the bottom of the water storage bin 1; the detection bin 2 comprises a buffer bin 21 and an observation bin 22 communicated with the buffer bin 21, and the buffer bin 21 is positioned at the bottom of the pervious concrete sample 3; the buffering bin 21 is of an L-shaped hollow transparent structure with a sealing end 211 at the top, the observation bin 22 is of a hollow transparent structure, and a water outlet 23 is formed in the buffering bin 21; the flow meter 4 is mounted on the water outlet 23.
In the device of the embodiment, the water storage bin 1 is a cuboid hollow transparent structure, the side length of the bottom surface of the water storage bin is 95 +/-2 mm, the height of the water storage bin is 700 +/-5 mm, the water storage bin 1 is made of colorless transparent acrylic, and the thickness of the water storage bin is 8 mm. The observation bin 22 is also a cuboid hollow transparent structure, the side length of the bottom surface of the observation bin is 50 +/-2 mm, the height of the bottom surface of the observation bin is 900 +/-5 mm, the material of the observation bin 22 is colorless transparent acrylic, and the thickness of the observation bin is 8 mm. Surge bin 21 is L type cavity transparent construction, includes the short right angle limit of being connected with the concrete test that permeates water and the long direct limit of being connected with observation storehouse 22, and short right angle limit and long right angle limit are cuboid cavity transparent construction, and wherein, the bottom surface length of side of short right angle limit is 95 ± 2mm, and is high 100mm, and the bottom surface length of side of long direct limit is 100mm, and is high 200 mm. The diameter of the water outlet 23 is 30 mm. The pervious concrete sample 3 is a cube with the side length of 100mm and the upper and lower pervious areas of 10000mm2。
In this embodiment, the sealing end 11 and the sealing end 211 are both rubber layers.
The process of this embodiment utilizing the above-mentioned device to determine pervious concrete system that permeates water fast is as follows:
1) cement is coated on the front, the back, the left and the right of the pervious concrete sample 3 to form a sealing layer, and the area of the pervious surface of the pervious concrete sample 3 is 10000mm of the area of the bottom surface2；
2) Placing the sealed permeable concrete sample 3 on the sealing end 211 of the buffer bin 21, placing the sealing end 11 of the water storage bin 1 on the permeable concrete sample 3, and properly adjusting to ensure the sealing property of the contact end;
3) closing the flowmeter 4, injecting water from the observation bin 22, stopping injecting water when tap water is injected to 4/5 of the water storage bin 1, and standing until the water level of the observation bin 22 is flush with the water level of the water storage bin 1;
4) opening the flowmeter 4, adjusting the descending speed of the water level of the flowmeter 4 to the observation bin 22 from large to small, wherein the descending speed is consistent with that of the water level of the water storage bin 1, and the flow of the flowmeter 4 is the characteristic value M (ml/s) of the water permeability coefficient of the pervious concrete sample;
5) and the water permeability coefficient of the pervious concrete is M/A (mm/s).
The water permeability coefficient detection results of the pervious concrete are shown in the following table 1.
TABLE 1 determination of Permeability coefficient of pervious concrete samples
In the JCT945-2005, a conventional method (a non-connected method in the table 1) is a mature water permeability coefficient measuring method commonly used in the prior art, in the table 1, the large water permeability coefficient value measured by the conventional method is caused by the fact that pressure difference exists, so that the real water permeability coefficient of the pervious concrete cannot be accurately represented, and the device can avoid the influence of water pressure on the real water permeability performance of the pervious concrete.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a device of rapid survey concrete permeability coefficient that permeates water which characterized in that, includes the water storage storehouse, the concrete sample that permeates water detects storehouse and flowmeter:
the water storage bin is of a hollow transparent structure with a sealing end at the bottom;
the pervious concrete sample is positioned at the bottom of the water storage bin;
the detection bin comprises a buffer bin and an observation bin communicated with the buffer bin, and the buffer bin is positioned at the bottom of the pervious concrete sample; the buffer bin is of an L-shaped hollow transparent structure with a sealing end at the top, the observation bin is of a hollow transparent structure, and a water outlet is formed in the buffer bin;
the flowmeter is installed on the water outlet.
2. The apparatus for rapid determination of water permeability coefficient of pervious concrete according to claim 1, wherein said sealing end is made of rubber having elasticity.
3. The apparatus for rapid determination of water permeability coefficient of pervious concrete according to claim 1, wherein said pervious concrete sample is square, and sealing layers are further provided on the front, rear, left and right surfaces of said pervious concrete sample.
4. The apparatus for rapid determination of the permeability coefficient of pervious concrete according to claim 3, wherein said sealing layer is a cement layer.
5. The device for rapidly measuring the permeability coefficient of pervious concrete according to claim 1, wherein the water storage bin and the observation bin are cuboid hollow transparent structures.
6. The device for rapidly measuring the permeability coefficient of pervious concrete according to claim 1, wherein the water storage bin, the buffer bin and the observation bin are made of colorless transparent acrylic or glass, and the thickness of the water storage bin, the buffer bin and the observation bin is 5-10 mm.
7. The apparatus for rapidly determining the water permeability coefficient of pervious concrete according to claim 1, wherein the accuracy of the flowmeter is 1-2 ml/s, and the measurement range is 0-1500 ml/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921177682.8U CN210626270U (en) | 2019-07-25 | 2019-07-25 | Device for rapidly determining permeability coefficient of pervious concrete |
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| CN201921177682.8U CN210626270U (en) | 2019-07-25 | 2019-07-25 | Device for rapidly determining permeability coefficient of pervious concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320148A (en) * | 2019-07-25 | 2019-10-11 | 中建西部建设西南有限公司 | A kind of device and method of quick measurement permeation coefficient of permeable concrete |
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2019
- 2019-07-25 CN CN201921177682.8U patent/CN210626270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320148A (en) * | 2019-07-25 | 2019-10-11 | 中建西部建设西南有限公司 | A kind of device and method of quick measurement permeation coefficient of permeable concrete |
| CN110320148B (en) * | 2019-07-25 | 2024-10-01 | 中建西部建设西南有限公司 | Device and method for rapidly determining water permeability coefficient of pervious concrete |
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