CN113866080A - A test device and test method for simulating salt corrosion damage of porous media materials - Google Patents
A test device and test method for simulating salt corrosion damage of porous media materials Download PDFInfo
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Abstract
本发明属于多孔介质材料的盐蚀技术领域，具体涉及一种模拟多孔介质材料盐蚀破坏试验装置及方法。本发明包括补水系统、温湿控制系统、数字采集系统、盐分传感器、称重装置和控温箱；控温箱内放置有试验试样，试验试样内设有多个盐分传感器；补水系统向试验试样的底部输送液体，温湿控制系统实时控制控温箱内的温度和湿度，从而模拟多孔介质材料在干湿交替、温度变化下实际的盐蚀破坏过程，并通过多孔介质材料的实时的盐分分布、吸水情况、质量变化率、以及盐蚀破坏的状态变化。本发明能够模拟多孔介质材料在干湿交替、温度变化下实际的盐蚀破坏过程，实时采集试验试样的盐分分布、吸水情况、质量变化率、以及盐蚀破坏的状态变化。
The invention belongs to the technical field of salt corrosion of porous medium materials, and particularly relates to a test device and method for simulating salt corrosion damage of porous medium materials. The invention includes a water replenishment system, a temperature and humidity control system, a digital acquisition system, a salinity sensor, a weighing device and a temperature control box; a test sample is placed in the temperature control box, and a plurality of salt sensors are arranged in the test sample; The bottom of the test sample conveys liquid, and the temperature and humidity control system controls the temperature and humidity in the temperature control box in real time, so as to simulate the actual salt corrosion damage process of the porous media material under the alternating dry and wet and temperature changes, and through the real-time control of the porous media material. The salinity distribution, water absorption, mass change rate, and state change of salt erosion damage. The invention can simulate the actual salinity damage process of the porous medium material under the alternation of dry and wet and temperature changes, and real-time collects the salt distribution, water absorption, mass change rate, and state changes of the salinity damage of the test sample.
Description
Technical Field
The invention belongs to the technical field of salt corrosion of porous medium materials, and particularly relates to a test device and a method for simulating salt corrosion damage of a porous medium material.
Background
The salt corrosion is a main natural factor inducing the damage of the porous medium material, and the salt corrosion to the porous medium material is aggravated by the alternation of dry and wet and the temperature change, so that the performance of the porous medium material is seriously influenced. Although great efforts have been made to prevent and protect porous media materials from salt attack, many problems remain to be solved. In wide areas of China, porous dielectric material structures are always in salt corrosion damage under the coupling action of temperature and humidity. At present, few devices for simulating salt corrosion damage of samples in a temperature and humidity coupling state are used in China.
Disclosure of Invention
The invention provides a device and a method for simulating salt corrosion damage of a porous medium material, aiming at solving the problem that the prior art lacks a device for researching the salt corrosion damage of a sample in a coupling state of simulated temperature and humidity.
The invention is realized by adopting the following technical scheme: a test device and method for simulating salt corrosion damage of a porous medium material comprise a water supplementing system, a temperature and humidity control system, a digital acquisition system, a salt sensor, a weighing device and a temperature control box;
a test sample is placed in the temperature control box, and a plurality of salinity sensors are arranged in the test sample;
the temperature and humidity control system is communicated with the temperature control box;
the weighing device is placed right below the test sample;
the salinity sensor, the water replenishing system, the weighing device and the digital acquisition system are electrically connected;
the water replenishing system conveys liquid to the bottom of the test sample, the temperature and humidity control system controls the temperature and the humidity in the temperature control box in real time, so that the actual salt corrosion damage process of the porous medium material under the condition of alternation of dryness and humidity and temperature change is simulated, and the water salt migration rule, the quality change of the sample and the surface layer damage state of the sample in the salt corrosion damage process are detected and analyzed in real time through the real-time salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the porous medium material.
Further, the bottom of accuse temperature case is equipped with the support, the top of support is equipped with the support bottom plate, two through-holes have been seted up on the support bottom plate, through-hole and water charging system intercommunication, be connected with the fixed bolster around the support bottom plate, be equipped with the round recess on the inner wall of fixed bolster bottom, install the sealing washer in the recess, cuboid sample case has been placed in the fixed bolster, the fixed bolster passes through the sealing washer with cuboid sample case and seals, cuboid sample case is upper and lower open-ended cuboid, test sample places in cuboid sample case, supreme equidistant interval is provided with a plurality of probe holes from bottom to top on the lateral wall of cuboid sample case, salinity sensor installs at the probe downthehole.
Furthermore, a permeable stone and filter paper are laid on a support base plate in the temperature control box from bottom to top, and the test sample is in contact with the filter paper.
Further, the water supplement system comprises a marigoloid bottle, a water conduit and a water level adjusting pipe;
the Malao bottle is arranged outside the temperature control box and is communicated with one through hole on the bottom plate of the support through a water guide pipe, and the other through hole is connected with the water level adjusting pipe;
and the water guide pipe is provided with a first flowmeter and a valve, and the first flowmeter is electrically connected with the digital acquisition system.
Furthermore, the temperature and humidity control system comprises a temperature and humidity controller, a heater, a refrigeration compressor, a ventilation pipeline and a spray humidifier;
the second flowmeter is arranged on the spray humidifier, and the second flowmeter, the heater and the refrigeration compressor are electrically connected with the temperature and humidity controller;
the spraying humidifier is arranged inside the temperature control box, the heater and the refrigeration compressor are arranged outside the temperature control box, and the heater and the refrigeration compressor are communicated to the inside of the temperature control box through a ventilation pipeline.
Further, the application also comprises an electronic computer;
the digital acquisition system and the temperature and humidity controller are electrically connected with an electronic computer.
Furthermore, this application still includes high resolution camera and shadowless lamp, and high resolution camera and shadowless lamp locate the top of accuse temperature case, and the shadowless lamp is the adjustable cold light source of light source.
Further, the radiation lamp is arranged on the top of the temperature control box and is electrically connected with the electronic computer.
Furthermore, the cuboid sample box is made of organic glass.
A test method for simulating salt corrosion damage of a porous medium material is characterized in that a test sample is arranged in a cuboid sample box after being prepared, the cuboid sample box is fixed on a fixed support, a water supplementing system supplements liquid to the test sample for testing, and a temperature and humidity control system controls the temperature and humidity in a temperature control box in the test process, so that the actual salt corrosion damage process of the porous medium material under the condition of alternation of dryness and humidity and temperature change is simulated, and a digital acquisition system acquires the salt distribution, the water absorption condition, the mass change rate and the state change of salt corrosion damage of the test sample in real time.
Compared with the prior art, the invention has the beneficial effects that:
1. the water replenishing system replenishes liquid to a test sample for testing, the temperature and humidity control system controls the temperature and humidity in the temperature control box in the testing process, the actual salt corrosion damage process of the porous medium material under the conditions of alternation between dry and wet and temperature change is simulated, the digital acquisition system acquires the salt distribution, the water absorption condition, the mass change rate and the state change of the salt corrosion damage of the test sample in real time, the influence of salt migration, the external temperature and the humidity on the salt corrosion damage of the porous medium material under the conditions of alternation between dry and wet and temperature change can be analyzed, the salt corrosion damage mechanism of the porous medium material is further obtained, technical support is provided for further clarifying the research of the salt corrosion damage mechanism of the test sample under certain temperature and humidity, and theoretical basis is provided for the durability design of the structure of the porous medium material;
2. the temperature and humidity control system can automatically adjust the temperature and the humidity in the temperature control box according to the conditions given by the electronic computer, can simulate the environmental conditions of the salt corrosion damage of the porous medium material more truly, fully considers the influence of external environmental factors on the salt corrosion damage of the porous medium material, and is beneficial to exploring the internal mechanism of the salt corrosion damage of the porous medium material;
3. the digital acquisition system records the first flowmeter, can detect the water replenishing condition of the test sample in real time, and enables analysis of water and salt migration under real-time conditions and analysis of the influence of the water and salt migration on the salt corrosion damage of the test sample to be possible;
4. according to the high-resolution camera arranged at the top of the temperature control box, the state change of the sample subjected to salt corrosion damage can be observed more clearly by recording the image data of the sample surface in the salt corrosion damage process;
5. the salinity sensor can accurately detect the real-time salinity distribution condition in the sample, more accurately observe the salinity migration condition in the sample, and provide accurate and scientific data for researches on sample salinity migration paths, salinity migration characteristics, influences of salinity migration on sample salt corrosion damage and the like;
6. the radiant lamp arranged on the top of the temperature control box can adjust the brightness and radiate heat through a program, so that the evaporation of water on the surface of a sample is increased, and the water and salt migration intensity is accelerated; the installed shadowless lamp with the adjustable cold light source can not emit heat, and can not influence the experimental environment in the temperature control box; the influence of the shadow of an object (such as a data line) around the high-resolution camera on the image data is eliminated;
7. the cuboid sample case of this application comprises transparent organic glass, is convenient for observe the preparation condition of sample during the system appearance, the deformation condition of observation test sample that can be convenient during the experiment to organic glass has non-deformable, is difficult for taking place characteristics such as corrosion, the washing of being convenient for, is fit for as the test sample case.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a rectangular parallelepiped sample case of the present invention;
FIG. 3 is a schematic view of the connection between a rectangular parallelepiped sample case and a fixing bracket according to the present invention;
in the figure: 1-probe hole, 2-cuboid sample box, 3-permeable stone, 4-aqueduct, 5-spray humidifier, 6-high resolution camera, 7-shadowless lamp, 8-digital acquisition system, 9-first flowmeter, 10-Malao bottle, 11-protective shell, 12-temperature and humidity controller, 13-electronic computer, 14-valve, 15-temperature control box, 16-heater, 17-refrigeration compressor, 18-ventilation pipeline, 19-filter paper, 20-test sample, 21-water level adjusting tube, 22-sealing ring, 23-fixed support, 24-weighing device, 25-radiation lamp, 26-support, 27-support bottom plate, 28-through hole, 29-second flowmeter, 30-fixing the knob.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a simulation porous medium material salt corrosion destruction test device and method, including water charging system, warm and humid control system, digital acquisition system 8, salinity sensor, weighing device 24 and temperature control box 15;
a test sample 20 is placed in the temperature control box 15, a plurality of salinity sensors are arranged in the test sample 20, and the salinity sensors can effectively, conveniently and fully detect the distribution condition of salinity in each layer of sample in the sample box in real time;
the temperature and humidity control system is communicated with the temperature control box 15;
the weighing device 24 is placed right below the test sample 20, and the mass change of the salt corrosion damage of the test sample 20 is recorded in real time;
the salinity sensor, the water replenishing system and the weighing device 24 are electrically connected with the digital acquisition system 8;
the water replenishing system conveys liquid to the bottom of the test sample 20, and the temperature and humidity control system controls the temperature and the humidity in the temperature control box 15 in real time, so that the actual salt corrosion damage process of the porous medium material under the condition of alternation of dryness and humidity and temperature change is simulated, and the water and salt migration rule, the quality change of the sample and the surface layer damage state of the sample in the salt corrosion damage process are detected and analyzed in real time through the real-time salt distribution, the water absorption condition, the quality change rate and the state change of the salt corrosion damage of the porous medium material.
The bottom of the temperature control box 15 is provided with a support 26, the top end of the support 26 is provided with a support base plate 27, the support base plate 27 is provided with two through holes 28, the through holes 28 are communicated with a water charging system, the periphery of the support base plate 27 is connected with a fixed support 23 (the fixed support and the support base plate are in threaded connection), the inner wall of the bottom of the fixed support 23 is provided with a circle of groove, a sealing ring 22 is arranged in the groove, a cuboid sample box 2 is placed in the fixed support 23, the fixed support 23 and the cuboid sample box 2 are sealed through the sealing ring 22 (the sealing ring 22 is in contact with the bottom surface of the cuboid sample box 2), the top end of the fixed support 23 is in threaded connection with a fixed knob 30, the cuboid sample box 2 is fixed in the fixed support 23 by the fixed knob 30 (the cuboid sample box 2 can be disassembled, the cuboid sample box can be taken out separately during each test, the test sample preparation, compaction and sample disassembly are convenient), the cuboid sample box 2 is a cuboid with an upper opening and a lower opening, the test sample 20 is placed in a cuboid sample box 2, a plurality of probe holes 1 are arranged on the side wall of the cuboid sample box 2 at equal intervals from bottom to top, and the salinity sensor is arranged in the probe holes 1;
the support 26 supports the test sample 20 in the temperature control box 15 to meet the test requirements; the fixing bracket 23 is used for fixing the cuboid sample box 2; the support base plate 27 provides a supporting force for the cuboid sample box 2; the stability of the test device is ensured, and the test is convenient;
a permeable stone 3 and filter paper 19 are laid on a support base plate 27 in the temperature control box 15 from bottom to top, and the test sample 20 is in contact with the filter paper 19 to ensure uniform water supplement to the test sample 20.
The water replenishing system comprises a mariao bottle 10, a water guide pipe 4 and a water level adjusting pipe 21;
the Marble bottle 10 is arranged outside the temperature control box 15, the Marble bottle 10 is communicated with one through hole 28 on the support base plate 27 through the water guide pipe 4 and is used for supplementing water to the test sample, and the other through hole 28 is connected with the water level adjusting pipe 21 and is used for adjusting the water pressure;
the water guide pipe 4 is provided with a first flowmeter 9 and a valve 14, the first flowmeter 9 is electrically connected with the digital acquisition system 8, and the first flowmeter 9 accurately records the water supplementing condition of the test sample.
The temperature and humidity control system comprises a temperature and humidity controller 12, a heater 16, a refrigeration compressor 17, a ventilation pipeline 18 and a spray humidifier 5;
the second flowmeter 29 is arranged on the spray humidifier 5, the second flowmeter 29, the heater 16 and the refrigeration compressor 17 are electrically connected with the temperature and humidity controller 12, and the protective shell 11 is arranged outside the heater 16 and the refrigeration compressor 17;
the spray humidifier 5 is arranged inside the temperature control box 15, the heater 16 and the refrigeration compressor 17 are arranged outside the temperature control box 15, and the heater 16 and the refrigeration compressor 17 are communicated to the inside of the temperature control box 15 through a ventilation pipeline 18;
a heater 16 for adjusting the temperature in the temperature control box and increasing the temperature in the temperature control box; a refrigeration compressor 17 for adjusting the temperature in the temperature control box and reducing the temperature in the temperature control box; a spray humidifier 5 for adjusting the humidity in the temperature control box 15; the temperature and humidity controller 12 detects and controls the temperature and the humidity in the temperature control box 15 in real time, overall adjustment is carried out on the test environment, and the salt corrosion failure mechanism under different test conditions can be analyzed more accurately; a ventilation pipeline 18 for blowing cold/hot air into the temperature control box 15 to adjust the temperature in the temperature control box and adjusting the humidity in the temperature control box by the evaporation of hot air flow; and a temperature control box 15 for keeping the humidity and the temperature of the test.
The application also includes an electronic computer 13;
the digital acquisition system 8 and the temperature and humidity controller 12 are electrically connected with an electronic computer 13.
This application still includes high resolution camera 6 and shadowless lamp 7, the configuration of high resolution camera 6 is the high definition camera lens, the top of accuse incubator 15 is located to high resolution camera 6 and shadowless lamp 7, shadowless lamp 7 be the adjustable cold light source of light source, high resolution camera 6 is used for recording the salt corrosion destruction process of top layer test sample 20 in experimental time, shadowless lamp 7 is the adjustable cold light source, the cold light source can not give off the heat, can not influence the experimental environment in the accuse incubator, the influence of the shadow of object such as data line around the high resolution camera to image data has been got rid of.
This application still includes radiation lamp 25, and radiation lamp 25 sets up in the top of accuse temperature case 15 and with electronic computer 13 electric connection, and electronic computer 13 control is adjusted radiation lamp 25's luminance and is diffused the heat, helps increasing the evaporation of water on test sample 20 surface, accelerates water salt migration intensity.
The digital acquisition system 8 is used for monitoring the temperature and the water content in the temperature control box 15, recording the state change (image data) of the corrosion damage of the sample fed back by the high-resolution camera 6 along with the water and salt migration process, the real-time salt distribution in the detection sample fed back by the salt sensor, the water supplement condition of the test sample fed back by the first flowmeter 9, the damage process of the surface sample fed back by the weighing device 24 along with the test and the quality change of the test sample 20, namely the digital acquisition system 8, the digital acquisition system 8 acquires the temperature, the humidity and the external water supplement amount under the test environment, detects the real-time salt distribution of the sample, and the damage process of the surface sample along with the test and the quality change of the test sample;
the support 26, the support bottom plate 27 and the fixed support 23 are all made of stainless steel, the salt solution corrosion resistance is good, and the salt sensor, the valve 14 and the electrically connected lead are all made of materials with good corrosion resistance.
The skin sample peeled off by the test specimen 20 due to salt corrosion damage falls onto the weighing device 24, so that the weighing device 24 records the change in mass of the test specimen 20 in real time.
A test method for simulating salt corrosion damage of a porous medium material is characterized in that a test sample 20 is arranged in a cuboid sample box 2 after being prepared, the cuboid sample box 2 is fixed on a fixing support 23, a water supplementing system supplements liquid to the test sample 20 for testing, and meanwhile, a temperature and humidity control system controls the temperature and the humidity in a temperature control box 15 in the testing process, so that the actual salt corrosion damage process of the porous medium material under the condition of alternation of dryness and humidity and temperature change is simulated, and a digital acquisition system 8 acquires the salt distribution, the water absorption condition, the mass change rate and the state change of the salt corrosion damage of the test sample 20 in real time.
Preparation of test specimen 20: taking out a proper amount of undisturbed sample from the porous medium material structure to be tested, and measuring the physical and mechanical indexes of the test sample 20 by using a test instrument; the test sample 20 with proper volume is taken out from the porous medium material structure and put into the cuboid sample box 2, the test sample 20 is required to be attached to the inner wall of the cuboid sample box 2 and is level with the upper surface of the cuboid sample box 2, so that the expansion phenomenon of the test sample 20 can be more obviously observed when the sample is damaged by salt corrosion;
placing the cuboid sample box 2 with the test sample 20 in the temperature control box 15, and fixing the cuboid sample box 2 on the support base plate 27 by using the fixing bracket 23;
after the cuboid sample box 2 is fixed, opening a valve 14 and a first flowmeter 9 on the water guide pipe 4, and recording the water replenishing condition of the test sample;
respectively inserting a salt sensor into probe holes 1 on the side wall of a cuboid sample box 2, and turning on a shadowless lamp 7, a high-resolution camera 6, a digital acquisition system 8 and a weighing device 24; the temperature and humidity controller 12 is opened, the electronic computer 13 is used for setting a temperature and humidity control program, and the temperature, the humidity, the heating/cooling rate, the operation time of the temperature and humidity controller 12 and the like under the initial condition of the experiment are set;
in the test process, the information acquired by the digital acquisition system 8 is transmitted into a computer, and detection software in the computer can realize control over the digital acquisition system 8, namely sampling frequency, data storage format, output format and the like; the actual experimental environment can be really recorded through the temperature and the humidity detected by the digital acquisition system 8;
after the test is finished, the cuboid sample box 2 is dismantled, the test sample 20 is taken out, the test sample 20 is cut in layers from one end of the test sample 20 according to the standard requirements of 'geotechnical test regulations', the moisture content and the conductivity of each layer are measured, and the salt corrosion damage moisture and the salt migration condition under the conditions of certain temperature and humidity are researched.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436265A (en) * | 2022-08-17 | 2022-12-06 | 中震科建(广东)防灾减灾研究院有限公司 | Non-contact visual test device and test method |
| CN116908074A (en) * | 2023-09-11 | 2023-10-20 | 常州市建筑材料研究所有限公司 | Intelligent detection device and detection method for building waterproof material |
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| CN116908074B (en) * | 2023-09-11 | 2023-12-08 | 常州市建筑材料研究所有限公司 | Intelligent detection device and detection method for building waterproof material |
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