CN220206747U - Testing device for temperature and humidity inside cement-based material - Google Patents
Testing device for temperature and humidity inside cement-based material Download PDFInfo
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- CN220206747U CN220206747U CN202321975058.9U CN202321975058U CN220206747U CN 220206747 U CN220206747 U CN 220206747U CN 202321975058 U CN202321975058 U CN 202321975058U CN 220206747 U CN220206747 U CN 220206747U
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- 239000004568 cement Substances 0.000 title claims abstract description 72
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 58
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 19
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 5
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 5
- 239000012466 permeate Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model relates to a testing device for internal temperature and humidity of a cement-based material, which comprises a thin-wall pipe, a hydrophobic and breathable film and a temperature and humidity sensor, wherein the thin-wall pipe adopts a telescopic structure and comprises an inner thin-wall pipe, a middle thin-wall pipe and an outer thin-wall pipe which are mutually and sequentially in limiting insertion connection, the hydrophobic and breathable film is filled at the end part of the inner thin-wall pipe, which is far away from the middle thin-wall pipe, the temperature and humidity sensor extends into the thin-wall pipe from the end of the outer thin-wall pipe, which is far away from the middle thin-wall pipe, and the end of the outer thin-wall pipe, which is far away from the middle thin-wall pipe, is sealed through an inner cover. The testing device realizes rapid adjustment and test of the internal temperature and relative humidity of cement-based materials at different depths; the defect that the sensor is easy to damage due to excessive free water in the cement-based material slurry is solved; the sensor can be replaced in the middle of the test, and can be recycled when the test is not needed; the internal relative humidity test can be carried out on cement-based materials in different states, and comprises cement-based material slurry bodies with different workability and cement-based material hardened bodies.
Description
Technical Field
The utility model relates to the technical field of intelligent monitoring of building materials, in particular to a testing device for internal temperature and humidity of cement-based materials.
Background
Cement concrete is one of the most widely used artificial building materials. Because the concrete has the advantages of low price, easy casting and forming, wide application range and the like, the concrete plays an important role which cannot be replaced in the field of building engineering. However, cement concrete is easy to lose water and shrink and deform under a drying condition to further cause cracking, and the carbonization rate of the concrete is accelerated to reduce the internal alkalinity under a certain humidity environment to further induce the risk of corrosion of the steel bars, and the potential risks are closely related to the relative humidity inside the cement concrete. Therefore, by accurately testing and monitoring the relative humidity and temperature inside the cement-based material, particularly at different depth positions from the surface of the cement concrete, important data support can be provided for a series of researches on the space-time distribution of the internal moisture, carbonization reaction, shrinkage deformation, creep, resistivity, internal stress change, crack formation mechanism and the like.
The current methods for monitoring the relative humidity inside cement-based materials are as follows:
1. after the cement-based material is hardened, drilling a hole to a certain depth on the surface of the test piece by using an electric drill, and then inserting a temperature and humidity sensor into the hole and performing sealing treatment. The method has the defects that: (1) The internal relative humidity can only be tested after the cement paste is hardened, and the humidity of the cement-based material just poured cannot be effectively monitored; (2) Because the hole walls generated by drilling are all concrete, the measured humidity is an average value in the range from the surface layer of the concrete to the depth of the drilling, and the internal relative humidity of a specific concrete at a specific depth cannot be measured; (3) The internal relative humidity is easily affected by the sealing material, and when the sealing material contains a certain moisture, the data of the internal relative humidity is affected.
2. The outer surface of the temperature and humidity sensor is coated with a waterproof breathable film, then the waterproof breathable film is inserted into the cement-based slurry, and the relative humidity of the cement-based slurry in the process from the slurry to the hardened body is monitored. However, in this method, the sensor is left in the hardened slurry, so that the sensor cannot be recovered, or the sensor cannot be replaced when a problem occurs.
3. The PVC pipe is utilized to reserve holes with certain diameter in the slurry, and waterproof treatment is carried out at the place where cement contacts, and the method can better test the internal relative humidity of the slurry at a certain depth, but has the following defects: (1) the space in the tube is large, and the balance of the internal relative humidity is slow; (2) The length of the tube cannot be adjusted on site, it is difficult to test the internal relative humidity of different depths of different test pieces, and the internal relative humidity is significantly affected by the tested depths, for example, the internal relative humidity of concrete 10mm from the surface layer and 30mm from the surface layer can be different by 20% RH.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to overcome the defects in the prior art, the testing device for the internal temperature and humidity of the cement-based material is provided, and the problems that the testing depth of the internal relative humidity cannot be quickly adjusted, the testing data is stable and slow, the sensor is easy to damage and difficult to recycle and the humidity testing sensor for the slurry body of the newly mixed cement-based material is easy to damage are solved.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a testing arrangement of inside humiture of cement-based material, includes thin wall pipe, hydrophobic ventilative film and temperature and humidity sensor, thin wall pipe adopt telescopic structure, including spacing interior thin wall pipe, well thin wall pipe and the outer thin wall pipe of pegging graft each other in proper order, hydrophobic ventilative film fills in the one end tip that well thin wall pipe was kept away from to interior thin wall pipe, temperature and humidity sensor stretches into in the thin wall pipe from the one end that well thin wall pipe was kept away from to outer thin wall pipe, the one end that well thin wall pipe was kept away from to outer thin wall pipe is sealed through the inner cup. The thin-wall pipes with different diameters are combined, and the depth of the thin-wall pipes extending into the slurry can be adjusted according to requirements, so that the temperature and the humidity of the test piece at different depth positions can be tested; the thin-wall pipe can be directly contacted with the cement-based material slurry body through the hydrophobic breathable film, so that the sensor is not damaged due to the fact that excessive free water permeates into the pipe, water vapor in the cement-based material permeates through the breathable film, and temperature and humidity data in the slurry body can be obtained through temperature and humidity sensor testing.
Furthermore, the temperature and humidity sensor is isolated from the air outside the inner cover through the sealing rubber plug, so that the exchangeable air volume between the inside of the cement-based material and the sensor is reduced, and the temperature and humidity test data are fast and stable; the temperature and humidity sensor is electrically connected to the temperature and humidity data acquisition instrument located outside through a lead penetrating through the sealing rubber plug and the inner cover.
Furthermore, scale marks are arranged outside the thin-wall pipe, so that the depth extending into the slurry can be intuitively controlled and regulated.
Further, the inner diameter and the outer diameter of the inner thin-wall tube, the middle thin-wall tube and the outer thin-wall tube are respectively 12 x 14mm, 14 x 16mm and 16 x 18mm, the lengths of the inner thin-wall tube, the middle thin-wall tube and the outer thin-wall tube are 3-7mm, and the lengths of the inner thin-wall tube, the middle thin-wall tube and the outer thin-wall tube are the same or different.
Furthermore, the hydrophobic and breathable film is made of polyethylene material and has the thickness of 0.3-0.5mm.
Further, the temperature and humidity sensor is a pin type digital temperature and humidity sensor, the relative humidity testing range is 0-100% RH, and the testing precision is 1.8% RH; the temperature test range is-40-125 ℃ and the test precision is 0.1 ℃.
Further, the diameter of the inner cover is 16mm, and a hole for allowing the lead to pass through is reserved in the middle of the inner cover; the diameter of the sealing rubber plug is 12mm, and a hole for allowing the lead to pass through is reserved in the middle of the sealing rubber plug.
After the device is adjusted to be fixed in length, the device is directly inserted into fresh concrete, so that the internal relative humidity and temperature value of the fresh concrete at a certain depth position in the service process of setting and hardening can be effectively obtained, or a cement-based material is drilled, the device is directly inserted into a hole for testing, and the problems that the testing depth of the internal relative humidity cannot be quickly adjusted, the testing data is stable and slow, the sensor is easy to damage and difficult to recycle, and the humidity testing sensor of the fresh cement-based material slurry is easy to damage are solved.
For cement-based material slurry with better workability, when the relative humidity inside the cement-based material slurry is tested, the extension length can be adjusted and then the cement-based material slurry is directly inserted into the cement-based material slurry; for cement-based slurry with poor working performance, the device is fixed at a certain position of a die in advance, and then the slurry is poured; for the hardened cement-based material, the device of the utility model is used by drilling and then inserting.
The beneficial effects of the utility model are as follows: realizing rapid adjustment and test of the internal temperature and relative humidity of the cement-based material at different depths; the defect that the sensor is easy to damage due to excessive free water in the cement-based material slurry is solved; the internal relative humidity data can be balanced in a short time; the sensor can be replaced in the middle of the test, and can be recycled when the test is not needed; the internal relative humidity test can be carried out on cement-based materials in different states, and comprises cement-based material slurry bodies with different workability and cement-based material hardened bodies.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic illustration of the utility model when tested for internal relative humidity of a cement-based material slurry body with good workability;
FIG. 3 is a schematic representation of the utility model when tested for internal relative humidity of a poorly working cementitious matrix slurry;
FIG. 4 is a schematic diagram of the present utility model when testing the internal relative humidity of a hardened cement-based material.
Reference numerals in the drawings: 1. the device comprises an outer thin-wall pipe, a middle thin-wall pipe, an inner thin-wall pipe, a hydrophobic and breathable film, a temperature and humidity sensor, a sealing rubber plug, a wire, an inner cover, a die, a cement base material slurry, a temperature and humidity data acquisition instrument, a hardened cement base material and holes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The testing device for the internal temperature and humidity of the cement-based material shown in fig. 1 comprises a thin-wall pipe, a hydrophobic and breathable film 4 and a temperature and humidity sensor 5, wherein the thin-wall pipe adopts a telescopic structure and comprises an inner thin-wall pipe 3, a middle thin-wall pipe 2 and an outer thin-wall pipe 1 which are mutually and sequentially in limiting insertion connection, the hydrophobic and breathable film 4 is filled at the end part of the inner thin-wall pipe 3, which is far away from the middle thin-wall pipe 2, the temperature and humidity sensor 5 stretches into the thin-wall pipe from the end of the outer thin-wall pipe 1, which is far away from the middle thin-wall pipe 2, and the end of the outer thin-wall pipe 1, which is far away from the middle thin-wall pipe 2, is sealed through an inner cover 8. The thin-wall pipes with different diameters are combined, and the depth of the thin-wall pipes extending into the slurry can be adjusted according to requirements, so that the temperature and the humidity of the test piece at different depth positions can be tested; the thin-wall pipe can be directly contacted with the cement-based material slurry body through the hydrophobic breathable film 4, so that the sensor is not damaged due to the fact that excessive free water permeates into the pipe, water vapor in the cement-based material permeates through the breathable film, and temperature and humidity data in the slurry body can be obtained through temperature and humidity sensor testing.
The temperature and humidity sensor 5 is isolated from the air outside the inner cover 8 through the sealing rubber plug 6, so that the exchangeable air volume between the inside of the cement-based material and the sensor is reduced, and the temperature and humidity test data is fast and stable; the temperature and humidity sensor 5 is electrically connected with an external temperature and humidity data acquisition instrument 11 through a lead 7 passing through the sealing rubber plug 6 and the inner cover 8.
The scale marks are arranged outside the thin-wall pipe, so that the depth extending into the slurry can be intuitively controlled and regulated.
The specification of the inner diameter of the inner thin-wall pipe 3, the specification of the outer diameter of the middle thin-wall pipe 2 and the specification of the outer thin-wall pipe 1 are respectively 12mm, 14mm, 16mm and 16mm, the lengths of the inner thin-wall pipe 3, the middle thin-wall pipe 2 and the outer thin-wall pipe 1 are 3-7mm, and the lengths of the inner thin-wall pipe 3, the middle thin-wall pipe 2 and the outer thin-wall pipe 1 are the same or different.
The hydrophobic and breathable film 4 is made of polyethylene and has the thickness of 0.3-0.5mm.
The temperature and humidity sensor 5 is a pin type digital temperature and humidity sensor, the relative humidity testing range is 0-100% RH, and the testing precision is 1.8% RH; the temperature test range is-40-125 ℃ and the test precision is 0.1 ℃.
The diameter of the inner cover 8 is 16mm, and a hole for allowing the lead 7 to pass through is reserved in the middle of the inner cover 8; the diameter of the sealing rubber plug 6 is 12mm, and a hole for allowing the lead 7 to pass through is reserved in the middle of the sealing rubber plug 6.
When the testing device works, the testing device comprises the following steps:
step 1: a layer of hydrophobic and breathable film 4 is stuck to the end part of the inner thin-wall tube 3, then a high-precision temperature and humidity sensor 5 which is pre-arranged in a sealing rubber plug 6 in advance extends into the lower end part of the inner thin-wall tube 3 until the sensor is basically contacted with the hydrophobic and breathable film 4, and the joint of the lead 7 and the sealing rubber plug 6 is sealed and fixed by glass cement in advance so as to prevent water exchange with the outside.
Step 2: according to the depth of a test piece for testing the internal relative humidity in actual needs, the lengths of the inner thin-wall pipe 3, the middle thin-wall pipe 2 and the outer thin-wall pipe 1 are telescopically adjusted, and the inner thin-wall pipe is fixed by adopting 502 glue after the adjustment is finished so as to resist the internal resistance inserted into the cement-based material slurry body. Finally, screwing the inner cover 8 with the lead 7 preset in advance, wherein the joint of the lead and the sealing rubber plug is sealed and fixed by glass cement in advance.
Step 3: different internal relative humidity sensor arrangements are employed for different states of cement-based materials. As shown in fig. 2, for the cement-based material slurry 10 with better workability, that is, slurry with good fluidity, low viscosity and small insertion resistance, when testing the relative humidity inside, the device fixed by 502 glue can resist the internal resistance of the inserted cement-based material, and can be directly inserted into the cement-based material slurry for testing;
as shown in fig. 3, for cement-based material slurries with poor workability, i.e., slurries with poor fluidity, high viscosity and high insertion resistance, when testing the relative humidity inside, the device of the present utility model needs to be fixed in advance at a certain position of the mold 9 with silica gel because the device fixed with 502 glue is difficult to resist the internal resistance of the inserted cement-based material. The fixing mode can be to drill a hole with the same maximum outer diameter as the device at the side edge of the die, seal the joint by glass cement after the device is inserted into the die to prevent the cement-based slurry from leaking out, and finally pour the cement-based slurry and vibrate and compact. After the slurry is hardened, the side mold can be dismantled, and the sensor device is preset in the cement slurry for subsequent experiments to determine the internal relative humidity;
as shown in fig. 4, for the hardened cement-based material 12, a hole 13 of a certain depth is drilled by an electric drill, and then the outer ring of the temperature and humidity testing device of a regulated length is wrapped with a part of the raw material belt and directly inserted into the hole to test the internal relative humidity of the hardened cement-based material. Since the temperature in the hole rises due to the drilling, the corresponding relative humidity value needs to be recorded after the temperature is constant.
Step 4: the temperature and humidity sensor is connected to the temperature and humidity data acquisition instrument 11 with the LED screen, so that the internal temperature and relative humidity of the cement-based material can be continuously and automatically monitored and recorded.
Step 5: when the relative humidity inside the cement-based material is not required to be tested, the cover can be unscrewed and the lead can be stretched outwards, and the lead is firmly connected with the sealing rubber plug and can resist the friction force between the sealing rubber plug and the pipe wall, so that the temperature and humidity sensor can be carried out together, and the recycling of the temperature and humidity sensor is realized.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The utility model provides a testing arrangement of inside humiture of cement-based material which characterized in that: including thin wall pipe, hydrophobic ventilative film (4) and temperature and humidity sensor (5), thin wall pipe adopt telescopic structure, including interior thin wall pipe (3), well thin wall pipe (2) and outer thin wall pipe (1) of spacing grafting each other in proper order, hydrophobic ventilative film (4) are filled in interior thin wall pipe (3) and are kept away from the one end tip of well thin wall pipe (2), temperature and humidity sensor (5) stretch into the thin wall intraductal from the one end that well thin wall pipe (2) was kept away from to outer thin wall pipe (1), the one end that well thin wall pipe (2) was kept away from to outer thin wall pipe (1) is sealed through inner cup (8).
2. The device for testing the internal temperature and humidity of a cement-based material according to claim 1, wherein: the temperature and humidity sensor (5) is isolated with the air outside the inner cover (8) through the sealing rubber plug (6), and the temperature and humidity sensor (5) is electrically connected with the temperature and humidity data acquisition instrument (11) positioned outside through a wire (7) penetrating through the sealing rubber plug (6) and the inner cover (8).
3. The device for testing the internal temperature and humidity of a cement-based material according to claim 1, wherein: and scale marks are arranged outside the thin-wall tube.
4. The device for testing the internal temperature and humidity of a cement-based material according to claim 1, wherein: the inner thin-wall tube (3), the middle thin-wall tube (2) and the outer thin-wall tube (1) have the specification of 12 x 14mm, 14 x 16mm and 16 x 18mm respectively, the lengths of the inner thin-wall tube (3), the middle thin-wall tube (2) and the outer thin-wall tube (1) are 3-7mm, and the lengths of the inner thin-wall tube (3), the middle thin-wall tube (2) and the outer thin-wall tube (1) are the same or different.
5. The device for testing the internal temperature and humidity of a cement-based material according to claim 1, wherein: the hydrophobic breathable film (4) is made of polyethylene and has a thickness of 0.3-0.5mm.
6. The device for testing the internal temperature and humidity of a cement-based material according to claim 1, wherein: the temperature and humidity sensor (5) is a pin type digital temperature and humidity sensor, the relative humidity testing range is 0-100% RH, and the testing precision is 1.8% RH; the temperature test range is-40-125 ℃ and the test precision is 0.1 ℃.
7. The device for testing the internal temperature and humidity of a cement-based material according to claim 2, wherein: the diameter of the inner cover (8) is 16mm, and a hole for allowing the lead (7) to pass through is reserved in the middle of the inner cover (8); the diameter of the sealing rubber plug (6) is 12mm, and a hole for allowing the lead (7) to pass through is reserved in the middle of the sealing rubber plug (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975058.9U CN220206747U (en) | 2023-07-26 | 2023-07-26 | Testing device for temperature and humidity inside cement-based material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975058.9U CN220206747U (en) | 2023-07-26 | 2023-07-26 | Testing device for temperature and humidity inside cement-based material |
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| Publication Number | Publication Date |
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| CN220206747U true CN220206747U (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321975058.9U Active CN220206747U (en) | 2023-07-26 | 2023-07-26 | Testing device for temperature and humidity inside cement-based material |
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| Country | Link |
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| CN (1) | CN220206747U (en) |
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- 2023-07-26 CN CN202321975058.9U patent/CN220206747U/en active Active
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