CN217561336U - Concrete accelerated carbonization test device capable of heating and pressurizing - Google Patents
Concrete accelerated carbonization test device capable of heating and pressurizing Download PDFInfo
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- CN217561336U CN217561336U CN202221629921.0U CN202221629921U CN217561336U CN 217561336 U CN217561336 U CN 217561336U CN 202221629921 U CN202221629921 U CN 202221629921U CN 217561336 U CN217561336 U CN 217561336U
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Abstract
A concrete accelerated carbonization test device capable of being heated and pressurized belongs to the technical field of detection test equipment and comprises a sealed carbonization test tank and a carbon dioxide gas supply system, wherein the sealed carbonization test tank comprises a tank body and a cover body, and a sealing ring is arranged at the connecting part of the tank body and the cover body; the tank body is internally provided with a lifting stainless steel bracket, distilled water and a heater, and the lower part of the side wall of the tank body is provided withWith CO 2 The cover body is provided with a pressure reducing valve, a temperature sensor, a humidity sensor and CO 2 Concentration sensor, temperature sensor, humidity sensor, and CO 2 The detection head ends of the concentration sensors are all arranged in the tank body; the carbon dioxide supply system comprises CO 2 Gas cylinder, temperature controller, humidity controller and CO 2 And a concentration controller. Adopt the utility model discloses the device can further accelerate concrete carbonization speed, can evaluate the anti carbonization ability of concrete early, also can carry out different temperatures different pressure through the device and carry out further experimental analysis to the influence of concrete carbonization.
Description
Technical Field
The utility model belongs to the technical field of the testing equipment, especially relate to a can heat pressurized concrete carbonization's device with higher speed.
Background
The concrete carbonization refers to that carbon dioxide chemically reacts with hydration products of cement in the presence of water in a certain environment to generate calcium carbonate and free water, so that the alkalinity of concrete is reduced, a passive film of a steel bar in reinforced concrete is damaged, the steel bar is easy to rust, and in addition, the carbonization process can generate shrinkage deformation, namely carbonization shrinkage, so that cracks can be generated on the surface of the concrete. The anti-carbonation performance of concrete should be studied in an early stage to find out the harm as early as possible so as to take necessary measures.
However, in natural environment, the concrete carbonization process is slow and long due to the fact that the concentration of carbon dioxide in the atmosphere is low and the humidity is also changed frequently, in order to accelerate the completion of the concrete carbonization test, the carbonization test box of the test equipment in the specification SL/T352-2020 of the test specification of hydraulic concrete has the requirements on the environment, the temperature is (20 +/-2) DEG C, the relative humidity is 70 +/-5%, and the concentration of carbon dioxide is 20 +/-3%, compared with the natural environment, the carbonization process is accelerated greatly. However, this also requires a longer process, and the concrete during carbonization has a greater influence on the carbonization speed due to temperature and pressure in addition to the relative humidity and carbon dioxide concentration. Chenjiajun considers that in the text 'analysis of deterioration mechanism and influence factors of concrete durability in carbonization environment' CO in atmosphere 2 The research on concrete carbonization becomes increasingly important under the influence of external factors such as increased concentration, increased temperature in the air and the like. The results of the handsome passing through the wind pressure accelerated concrete carbonization test show that the influence of wind pressure on concrete carbonization objectively exists. That is, the pressure will accelerate CO 2 The penetration in the concrete accelerates the carbonization reaction of the concrete.
The carbonization test chamber required in SL/T352-2020 is fixed temperature, fixed humidity and fixed CO 2 Concentration, and patent No. CN203981673U "concrete accelerated carbonation test device based on continuous humidity environment condition" discloses an accelerated carbonation test device, which can simulate continuous humidity environment condition and analyze carbonation law under continuous humidity, but its temperature is controlled in the range of 10-30 ℃, and the test research cannot be carried out on the environment above 30 ℃, and the device cannot increase pressure, and the carbonation speed of concrete is increased, but the increase range is limited. At present, no test device considers the carbonization rules under different temperatures and different pressures.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the concrete carbonization accelerating test device capable of increasing temperature and pressurizing can further accelerate the concrete carbonization speed, can evaluate the concrete carbonization resistance early, and can further test and analyze the influence of different temperatures and different pressures on the concrete carbonization.
The utility model provides a pressurized concrete accelerated carbonization test device can rise temperature which characterized by: the device comprises a sealed carbonization test tank and a carbon dioxide gas supply system, wherein the sealed carbonization test tank comprises a tank body and a cover body, and a sealing ring is arranged at the connecting part of the tank body and the cover body; the tank body is internally provided with a lifting stainless steel bracket and distilled waterAnd a heater, wherein CO is arranged at the lower part of the side wall of the tank body 2 An air inlet, a pressure reducing valve, a temperature sensor, a humidity sensor and CO are arranged on the cover body 2 Concentration sensor, temperature sensor, humidity sensor and CO 2 The detection head ends of the concentration sensors are all arranged in the tank body; the carbon dioxide gas supply system comprises CO 2 Gas cylinder, temperature controller, humidity controller and CO 2 Concentration controller, CO 2 The gas cylinder opening is provided with a gas cylinder control valve sealing ring and a pressure gauge.
And the heater and the temperature sensor are both connected with the temperature controller.
The humidity sensor is connected with the humidity controller.
The CO is 2 Concentration sensor and CO 2 The gas cylinders are all mixed with CO 2 The concentration controller is connected.
The lower part of the lifting stainless steel support is connected with the bottom of the tank body through screws, the upper part of the lifting stainless steel support is provided with a test piece rack through a fixing clamp, and a spiral ejector rod is arranged on the side face of an outer frame of the test piece rack.
Through the design scheme, the utility model discloses following beneficial effect can be brought: the utility model provides a test device that pressurized concrete accelerated carbonization that can rise temperature, considers the influence of temperature variation and pressure variation to concrete carbonization, both can rise the high temperature, can increase internal gas pressure again, can accelerate CO 2 The gas permeates into the concrete, so that the carbonization speed of the concrete is accelerated, the carbonization resistance of the concrete can be evaluated early, the influence of different temperatures and different pressures on the carbonization of the concrete can be further tested and analyzed through the device, and the device has important significance and application value in comprehensive analysis and evaluation of the durability of the concrete.
In particular, the method comprises the following steps of,
the utility model discloses the available electromagnetic heating of heater also can be heated by the resistance furnace to through temperature sensor with its control system synergism, with a certain temperature of temperature control at 20-80 ℃ within range, provide suitable condition for the influence of research temperature to concrete carbonization.
The utility model discloses the device adopts circular jar, uses the sealing washer sealed, and it joins in marriage the relief pressure valve to establish the gas outlet on the seal pot, and the pressure in the control seal pot provides suitable condition for studying the influence of air pressure to concrete carbonization.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is a schematic structural diagram of a test device for accelerated carbonization of concrete capable of being heated and pressurized according to the present invention.
Fig. 2 is a schematic diagram of the internal local structure of the tank of the testing apparatus for accelerated carbonization of concrete capable of heating and pressurizing.
Fig. 3 is a schematic structural view of a fixing clamp of a testing apparatus for accelerated carbonization of concrete capable of being heated and pressurized according to the present invention.
Fig. 4 is a schematic structural view of a test piece rack of a testing device for accelerated carbonization of concrete capable of being heated and pressurized.
In the figure, 1-temperature sensor, 2-humidity sensor, 3-sealed carbonization test tank, 4-sealing ring, 5-reducing valve and 6-CO 2 Concentration sensor, 7-heater, 8-CO 2 Air inlet, 9-pressure gauge, 10-gas cylinder control valve sealing ring and 11-CO 2 Concentration controller, 12-temperature controller, 13-humidity controller, 14-CO 2 The device comprises a gas cylinder, 15-a lifting stainless steel support, 16-a carbon dioxide gas supply system, 17-distilled water, 18-a test piece frame, 19-a fixing clamp, 20-a spiral ejector rod and 21-a test piece.
Detailed Description
A concrete accelerated carbonization test device capable of heating and pressurizing is shown in figures 1-4 and comprises a sealed carbonization test tank 3 and a carbon dioxide gas supply system 16, wherein the sealed carbonization test tank 3 is connected with the carbon dioxide gas supply system 16 through a gas supply pipe; the sealed carbonization test tank 3 comprises a tank body and a cover body, and a sealing ring 4 is arranged at the connecting part of the tank body and the cover body; the tank is internally provided with a lifting stainless steel bracket 15, distilled water 17 and a heater 7, and the lower part of the side wall of the tank is provided with CO 2 An air inlet 8, a pressure reducing valve 5, a temperature sensor 1, a humidity sensor 2 and CO are arranged on the cover body 2 Concentration sensingA temperature sensor 1, a humidity sensor 2 and CO 2 The detection head ends of the concentration sensors 6 are all arranged in the tank body; the carbon dioxide gas supply system 16 comprises CO 2 Gas cylinder 14, temperature controller 12, humidity controller 13, and CO 2 Concentration controller 11, CO 2 A gas cylinder control valve sealing ring 10 and a pressure gauge 9 are arranged at the opening of the gas cylinder 14.
The heater 7 and the temperature sensor 1 are both connected with a temperature controller 12. When the set temperature of the temperature controller 12 is reached, the temperature controller controls the heater to stop heating.
The humidity sensor 2 is connected to a humidity controller 13.
Said CO 2 Concentration sensor 6 and CO 2 The gas cylinders 14 are all CO 2 The concentration controller 11 is connected.
The lower part of the lifting stainless steel support 15 is connected with the bottom of the tank body through screws, the upper part of the lifting stainless steel support is provided with a test piece rack 18 through a fixing clamp 19, and a spiral ejector rod 20 is arranged on the side surface of an outer frame of the test piece rack 18.
A test piece 21 is arranged on the test piece holder 18.
The utility model relates to a pressurized concrete accelerated carbonization test device can rise temperature changes traditional experimental box structure, adopts circular test jar, can more effectual sealed, is equipped with temperature sensor and control system in the jar, humidity transducer and control system, carbon dioxide concentration sensor and carbon dioxide concentration control system, and automatic relief pressure valve is established to test jar top, can dispose the relief pressure valve of different weight as required by pressure. The temperature sensor and a control system thereof cooperate to control the temperature within a range of 20-80 ℃ with the precision of +/-2 ℃; the humidity sensor and the control system thereof cooperate to control the humidity within the range of 70% +/-5%; the carbon dioxide concentration sensor cooperates with the carbon dioxide concentration control system to control the carbon dioxide concentration in the test tank within the range of 20% -100%; the pressure reducing valve can select more than 3 valves with pressure, which can be respectively selected as 40kPa, 60kPa and 80kPa, and can also select pressure reducing valves with other pressures according to the test requirements.
The utility model discloses relief pressure valve 5's weight calculation is as follows:
when the pressure reducing valve is pushed up by the air pressure inside, the external atmospheric pressure and the self gravity of the valve are balanced with the internal atmospheric pressure according to the Newton's first theorem.
Then: p 0 ×S+mg＝P'×S
Converted, m = [ (P' -P.). Times.S ]/g
m is valve mass, kg;
P 0 -the external atmospheric pressure;
p' -tank internal air pressure;
P'-P 0 -internal and external pressure difference, kg/cm 2 ；
S-Cross-sectional area of valve, cm 2 ；
g-gravitational acceleration, 9.8N/kg
The operation process of the concrete accelerated carbonization testing device capable of heating and pressurizing of the utility model is that,
step one, placing a lifting stainless steel support 15 into a tank body of a sealed carbonization test tank 3, placing a sample to be tested 21 on a sample rack 18 of the lifting stainless steel support 15, injecting distilled water 17 into the tank body, starting an accelerated carbonization device to control the temperature to be within a certain range of 20-80 ℃ and the humidity to be within 70% +/-5%; the concentration of carbon dioxide is controlled within the range of 20% +/-3% according to the test requirement; the corresponding pressure reducing valve 5 is selected according to the test requirement, and 80kPa is preferably recommended to be selected.
And step two, stopping the test after 24 hours, taking out the concrete sample specimen 21, cutting a small block to perform a carbonization depth test, dripping 1% phenolphthalein reagent into the small block, measuring the carbonization depth of the small block if the color-changing part is not carbonized and the color-unchanging part is carbonized, and putting the small block into a test tank to continue the test if the required carbonization depth is not reached.
If the influence of different temperatures on the carbonization depth needs to be studied, the operation of the first step can be repeated by setting different temperatures.
If the influence of different pressures on the carbonization depth needs to be researched, the pressure reducing valve can be replaced according to the test requirement, and the operation of the first step can be repeated.
Claims (5)
1. The utility model provides a pressurized concrete accelerated carbonization test device can rise temperature which characterized by: the device comprises a sealed carbonization test tank (3) and a carbon dioxide gas supply system (16), wherein the sealed carbonization test tank (3) comprises a tank body and a cover body, and a sealing ring (4) is arranged at the connecting part of the tank body and the cover body; the tank is internally provided with a lifting stainless steel bracket (15), distilled water (17) and a heater (7), and the lower part of the side wall of the tank is provided with CO 2 An air inlet (8), a pressure reducing valve (5), a temperature sensor (1), a humidity sensor (2) and CO are arranged on the cover body 2 A concentration sensor (6), the temperature sensor (1), the humidity sensor (2) and the CO 2 The detection head ends of the concentration sensors (6) are all arranged in the tank body; the carbon dioxide gas supply system (16) comprises CO 2 A gas cylinder (14), a temperature controller (12), a humidity controller (13) and CO 2 Concentration controller (11), CO 2 A gas cylinder control valve sealing ring (10) and a pressure gauge (9) are arranged at the opening of the gas cylinder (14).
2. The apparatus of claim 1, wherein the apparatus comprises: the heater (7) and the temperature sensor (1) are both connected with a temperature controller (12).
3. The apparatus of claim 1, wherein the apparatus comprises: the humidity sensor (2) is connected with a humidity controller (13).
4. The apparatus of claim 1, wherein the apparatus comprises: said CO 2 A concentration sensor (6) and CO 2 The gas cylinders (14) are all connected with CO 2 The concentration controller (11) is connected.
5. The apparatus of claim 1, wherein the apparatus comprises: the lower part of the lifting stainless steel support (15) is connected with the bottom of the tank body through screws, the upper part of the lifting stainless steel support is provided with a test piece rack (18) through a fixing clamp (19) and a supporting plate, and a spiral ejector rod (20) is arranged on the side face of an outer frame of the test piece rack (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221629921.0U CN217561336U (en) | 2022-06-28 | 2022-06-28 | Concrete accelerated carbonization test device capable of heating and pressurizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221629921.0U CN217561336U (en) | 2022-06-28 | 2022-06-28 | Concrete accelerated carbonization test device capable of heating and pressurizing |
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| Publication Number | Publication Date |
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| CN217561336U true CN217561336U (en) | 2022-10-11 |
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| CN202221629921.0U Active CN217561336U (en) | 2022-06-28 | 2022-06-28 | Concrete accelerated carbonization test device capable of heating and pressurizing |
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| CN (1) | CN217561336U (en) |
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2022
- 2022-06-28 CN CN202221629921.0U patent/CN217561336U/en active Active
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