CN219675783U

CN219675783U - Concrete durability environment simulation device

Info

Publication number: CN219675783U
Application number: CN202320113537.3U
Authority: CN
Inventors: 刘鹏; 职炜挺; 王京; 王植槐; 余志武
Original assignee: Beijing Naiheng Detection Equipment Technology Development Co ltd; National Engineering Research Center Of High Speed Railway Construction Technology; Central South University
Current assignee: Beijing Naiheng Detection Equipment Technology Development Co ltd; National Engineering Research Center Of High Speed Railway Construction Technology; Central South University
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-09-12
Anticipated expiration: 2033-01-18

Abstract

The utility model discloses a concrete durability environment simulation device, which comprises a chamber body, a control test system, a temperature control system, a humidifying system, a gas control system, an air conditioning system, a rain system, a salt spray system, an illumination system and an ultraviolet infrared lamp system, wherein the temperature control system, the humidifying system, the gas control system, the air conditioning system, the rain system, the salt spray system, the illumination system and the ultraviolet infrared lamp system are connected with the control test system. According to the utility model, the natural environment where the concrete such as temperature, humidity, rain, salt fog and the like exists can be simulated according to different environmental characteristics of different areas, and the strength of different natural climate conditions can be regulated according to the requirement, so that the actual construction and maintenance environment of the appearance field can be more accurately reflected.

Description

Concrete durability environment simulation device

Technical Field

The utility model relates to the technical field of civil engineering, in particular to a concrete durability environment simulation device.

Background

At present, how to accurately predict the service life of a concrete structure is the focus and difficulty of research in the current civil engineering field. The type and concentration of the erosion medium, the environment type, the erosion mode and the like in the natural environment directly influence the durability degradation rate and degradation degree of the concrete structure. A great deal of research work has been carried out on the durability of concrete structures at home and abroad, but most of the research adopts an acceleration test method. Such tests are intended to accelerate the deterioration of the durability of concrete structures by increasing the temperature, relative humidity, concentration of aggressive media or introducing factors (such as current, etc.) that are not present in the field. However, the method can cause the mechanism, process and result of the durability erosion of the concrete structure to be inconsistent with the actual conditions, and the research result is difficult to apply to the actual engineering. The indoor simulation test method has the advantages of a real test method and an acceleration test method, and has the advantages of real, reliable and quick results, good simulation, strong reproducibility and correlation and the like. The indoor simulation test is carried out on the concrete, and the method has reference and guiding significance on the mechanism, the process and the result of the durability erosion of the concrete in the actual environment.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects existing in the prior art and providing a concrete durability environment simulation device.

In order to solve the technical problems, the utility model discloses a concrete durability environment simulation device which comprises a chamber body, a control test system, a temperature control system, a humidifying system, a gas control system, an air conditioning system, a rain system, a salt spray system, an illumination system and an ultraviolet infrared lamp system, wherein the temperature control system, the humidifying system, the gas control system, the air conditioning system, the rain system, the salt spray system, the illumination system and the ultraviolet infrared lamp system are connected with the control test system.

Furthermore, the room A and the room B adopt assembled warehouse board structures, the inner wall and the outer wall of the room A and the room B are stainless steel plates, the middle is filled with heat preservation foaming materials, one sides of the room A and the room B are provided with room doors, and the room doors are provided with observation windows.

Further, the temperature control system comprises a refrigeration compressor and a titanium alloy electric heater, and the humidifying system comprises a stainless steel armoured humidifier, a water cut-off protector, a water level automatic controller and an automatic water filling system; the air conditioning system comprises a centrifugal fan, and an air outlet of the centrifugal fan is connected with the chamber A and the chamber B; the rain spraying system comprises a spraying device and nozzles connected with the spraying device, and the nozzles with various different calibers are arranged at the tops of the chamber A and the chamber B; the illumination system and the ultraviolet infrared lamp system are arranged at the top of the A chamber and the B chamber, and the ultraviolet infrared lamp system comprises an ultraviolet lamp for performing test on ageing of a polymer test piece and an infrared lamp for performing temperature rising treatment on the environment.

Further, the gas control system is arranged to control the carbon dioxide concentration in the environment simulation device and can monitor the carbon dioxide concentration in the environment simulation box in real time so as to carry out carbonization test on the concrete test piece.

Further, the load system for applying load to the concrete test piece is further comprised, the load system comprises a loading device and a reaction frame for placing the concrete test piece, and the loading end of the loading device moves up and down relative to the reaction frame.

Further, be provided with chlorine salt environment simulation device in A room and the B room, chlorine salt environment simulation device includes chlorine salt environment simulation case and liquid reserve tank, the liquid reserve tank is interior to be stored with chlorine salt solution, the lateral wall of chlorine salt environment simulation case is provided with the scale, the bottom of chlorine salt environment simulation case be provided with the charge pipe and the drain pipe that the liquid reserve tank is connected, install the water pump that is used for filling water and drainage on the liquid reserve tank, install the splash agitator and be used for blowing the directional hair-dryer of dry concrete test piece in the chlorine salt environment simulation case.

Further, the A chamber and the B chamber are detachably provided with a sulfate environment simulation device, the sulfate environment simulation device comprises a sulfate environment simulation box, the bottom of the sulfate environment simulation box is loaded with a sulfate solution, and a porous material layer for embedding the bottom of a concrete test piece is arranged on the sulfate solution.

Compared with the prior art, the utility model has the advantages that:

1. according to the utility model, the natural environment where the concrete such as temperature, humidity, rain, salt fog and the like exists can be simulated according to different environmental characteristics of different areas, and the strength of different natural climate conditions can be regulated according to the requirement, so that the actual construction and maintenance environment of the appearance field can be more accurately reflected.

2. The concrete environment simulation device is divided into A, B chambers, the A, B chambers have different volumes, the salt fog and other gases in the chambers with relatively smaller volumes are easier to uniformly distribute, more concrete test blocks can be placed in the chambers with relatively larger volumes, and the two chambers can be used for a single variable comparison test.

Drawings

FIG. 1 is a three-dimensional schematic view of a concrete durability environment simulation case disclosed in a preferred embodiment of the present utility model;

FIG. 2 is a top view of a concrete durability environment simulation tank disclosed in a preferred embodiment of the present utility model;

FIG. 3 is a schematic diagram of a chloride salt environment simulation device according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic view of a sulfate environment simulation device according to a preferred embodiment of the present utility model;

fig. 5 is a flow chart of the operation disclosed in the preferred embodiment of the present utility model.

Legend description:

1. a hinged door; 2. an illumination system; 3. an ultraviolet infrared lamp system; 4. a rain system; 5. an air conditioning system; 6. a temperature control system; 7. a salt spray system; 8. a humidification system; 9. a gas control system; 10. a chloride environment simulation box; 11. a graduated scale; 12. a water filling pipe; 13. a drain pipe; 14. a concrete test piece; 15. a spray stirrer; 16. orienting a blower; 17. a liquid storage tank; 18. a chloride salt solution; 19. a sulfate environment simulation box; 20. a porous material layer; 21. a sulfate solution; 22. a load system; 23. a water pump; 24. a chamber A; 25. and a chamber B.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

As shown in fig. 1-5, the embodiment discloses a concrete durability environment simulation device, which comprises a chamber body, and further comprises a control test system, a temperature control system 6, a humidifying system 8, a gas control system 9, an air conditioning system 5, a rain system 4, a salt spray system 7, an illumination system 2 and an ultraviolet infrared lamp system 3 (comprising an ultraviolet lamp and an infrared lamp), wherein the control test system is connected with the temperature control system 6, the humidifying system 8, the gas control system 9, the air conditioning system 5, the rain system 4, the salt spray system 7, the illumination system 2 and the ultraviolet infrared lamp system 3, the chamber body comprises an a chamber 24 and a chamber 25, and the a chamber 24 and the chamber 25 are connected with the temperature control system 6, the humidifying system 8, the gas control system 9, the air conditioning system 5, the salt spray system 4, the illumination system 2 and the ultraviolet infrared lamp system 3. The A, B two chambers are arranged and can be used for comparing concrete test pieces 14 with the same proportion, and the change condition of the durability of the concrete is provided under the condition that the environment has a single variable; the B chamber 25 is a chamber body with smaller volume, the carbon dioxide and salt mist of the B chamber 25 are easier to be uniform relative to the A chamber 24, and more concrete test pieces 14 can be placed in the A chamber 24 relative to the B chamber 25. Therefore, the environment simulation device provided by the utility model can simulate the natural environment where concrete such as temperature, humidity, rain, salt fog and the like exist simultaneously or respectively according to different environmental characteristics of different areas, and can adjust the strength of different natural climate conditions according to the requirement, so that the actual construction and maintenance environment of an appearance field can be reflected more accurately.

In this embodiment, the room a 24 and the room B25 adopt an assembled warehouse structure, the inner and outer walls of the room a 24 and the room B25 are stainless steel plates, the middle is filled with a thermal insulation foaming material, one sides of the room a 24 and the room B25 are provided with room doors, the room doors adopt a double-open hinge door 1, and the room doors are provided with observation windows which are of glass structures.

In this embodiment, the temperature control system 6 includes a refrigeration compressor and a titanium alloy electric heater, the temperature can be regulated and controlled in a certain range, and a temperature target change curve in the environmental chamber can be set on a computer, and the actual temperature time course is recorded in the whole course. The humidifying system 8 comprises a stainless steel armoured humidifier, a water cut-off protector, a water level automatic controller and an automatic water filling system; the relative humidity in the environment box can be regulated and controlled in a certain range, a humidity target change curve in the environment box can be set on a computer, and the actual humidity time course is recorded in the whole course; the air conditioning system 5 comprises a centrifugal fan, an air outlet of the centrifugal fan is connected with the A chamber 24 and the B chamber 25, the centrifugal fan is positioned at a position opposite to the door wall surface and is higher than the door wall surface, the size, the model and the performance of the two chambers are consistent, and meanwhile, the centrifugal fan is used for balancing temperature and humidity adjustment and can uniformly distribute salt fog and other gases in the chamber.

In this embodiment, the rain system 4 includes a spraying device and nozzles connected with the spraying device, and a plurality of nozzles with different calibers are arranged at the top in the A chamber 24 and the B chamber 25; specifically, the rain system 4 is located at the top of the environmental box and is vertically downward, and two rows of spraying pipelines are adopted. Two groups of nozzles with different calibers are arranged, different rainfall intensities are met, and the nozzles are uniformly arranged above the spray frame, so that no dead zone exists. The illumination system 2, the ultraviolet infrared lamp system 3 are arranged on top of the a-chamber 24 and the B-chamber 25. Specifically, illumination system 2 is located the room body four corners, and two supports are evenly settled along vertically to the roof surface, and ultraviolet infrared lamp system 3 and rain system 4 crisscross setting do not influence each other and can use simultaneously, and the ultraviolet lamp can carry out test to the ageing of polymer test piece, and the infrared lamp can carry out the temperature rising to the environment and handle. Likewise, the ultraviolet infrared lamp system 3 presets a radiation intensity-time target curve by monitoring system software, and records the actual radiation intensity in the whole course.

In this embodiment, the gas control system 9 may control the carbon dioxide concentration in the environment simulation device, and may also monitor the carbon dioxide concentration in the environment simulation box in real time, for performing the carbonization test on the concrete test piece 14.

In this embodiment, in order to apply a static load or a fatigue load to the concrete sample 14, a load system 22 is further included, and the load system 22 includes a loading device and a reaction frame for placing the concrete sample 14, with a loading end of the loading device moving up and down relative to the reaction frame.

In this embodiment, a chloride salt environment simulation device is detachably disposed in the a chamber 24 and the B chamber 25, and the chloride salt environment simulation device includes a chloride salt environment simulation box 10 and a liquid storage box 17, where the chloride salt environment simulation box 10 can be used in cooperation with the salt spray system 7, and can simulate the atmospheric region of the seawater environment solution by controlling the spraying mode and time interval of the salt spray system. The chlorine salt solution 18 is stored in the liquid storage tank 17, the graduated scale 11 is arranged on the side wall of the chlorine salt environment simulation box 10, the water filling pipe 12 and the water draining pipe 13 connected with the liquid storage tank 17 are arranged at the bottom of the chlorine salt environment simulation box 10, and water filling and water draining are controlled through the water pump 23 at the bottom of the liquid storage tank 17. A spray stirrer 15 and a directional blower 16 for blowing dry the concrete test piece 14 are installed in the chloride salt environment simulation box 10. By controlling the frequency and speed at which the splash box 15 rotates, the splash zone of the marine environment is simulated.

In this embodiment, the a chamber 24 and the B chamber 25 are detachably provided with a sulfate environment simulation device, the sulfate environment simulation device includes a sulfate environment simulation box 19, the bottom of the sulfate environment simulation box 19 is loaded with a sulfate solution 21, a porous material layer 20 for embedding the bottom of the concrete sample 14 is provided on the sulfate solution 21, and the porous material layer 20 is mainly soil, sand or sponge, etc.

The utility model also discloses a concrete durability environment simulation method, which comprises the following steps:

s1, when a full-immersion test of chloride salt is carried out, debugging and calibrating test equipment are carried out before the test is started, three groups of concrete test pieces 14 are classified and marked and then are placed in an environment box loaded with a chloride salt solution 18, and sodium chloride solution with the mass concentration of 5% is configured in the box, wherein the relative humidity is not less than 90%; wherein the dimensions of the concrete test pieces 14 are 100mm×100mm×400mm, the first group is provided with one-dimensional erosion tests, the concrete test pieces 14 keep one or two opposite sides, and the surfaces of the rest concrete test pieces 14 are sealed by epoxy resin; setting a two-dimensional erosion test in the second group, reserving two adjacent surfaces of the concrete test piece 14, and sealing the surfaces of the rest concrete test pieces 14 by adopting epoxy resin; the third group is a blank comparison test, and no treatment is performed;

s2, performing a dry-wet cycle test and a salt fog test of the chlorine salt. The relative humidity of the dry-wet cycle test is 50% in the drying process, the spraying process is not less than 95%, each 72h is a test period, the spraying time is 1h, and the drying time is 71h; the relative humidity in a test box of the salt spray test is 60% in the drying process, the spraying process is not less than 95%, the test period of the salt spray test is 24 hours, the spraying time is 21 hours, the drying time is 3 hours at room temperature, and the spraying process is alternately carried out in 15min spraying and 15min intermittent modes. Meanwhile, the splash box 15 and the liquid storage tank 17 are controlled to simulate splash zone, tidal range zone and tidal fluctuation of the marine environment, and corresponding load is applied to the concrete test piece 14 under the condition of corresponding test;

s3, after each test period is finished, testing the performance of the concrete test piece 14, and recording the appearance and damage conditions of the concrete test piece 14;

s4, after the whole test sampling period is finished, testing the performance of the concrete test piece 14 according to a test scheme;

s1, when a sulfate erosion test is carried out, debugging and calibration are carried out on test equipment before the test is started, three groups of concrete test pieces 14 are classified and marked and then are placed in a sulfate solution environment box, sodium chloride solution with the mass concentration of 5% is configured in the box, and the lower part of the concrete test pieces 14 is positioned in a porous material layer 20, so that the root rot phenomenon of the lower part of a concrete structure in the sulfate erosion process is simulated; the sizes of the concrete test pieces 14 are 100mm multiplied by 400mm, the first group is a one-dimensional erosion test, one or two opposite side surfaces of the concrete test pieces 14 are maintained, and the surfaces of the rest concrete test pieces 14 are sealed by epoxy resin; the first group is a two-dimensional erosion test, the concrete test piece 14 keeps two adjacent surfaces, the surfaces of the rest concrete test pieces 14 are sealed by epoxy resin, and the third group is a blank control, and no treatment is performed;

s2, setting a sulfate erosion test for 30-90 days, and testing the performance of the concrete test piece 14 after the test is finished, recording the appearance shape, damage and degradation of the concrete test piece 14, and stopping the test in advance if the corrosion resistance coefficient of the concrete compressive strength is not more than 75% or the section degradation depth of the reinforced concrete test piece 14 reaches the thickness of the concrete protective layer;

and S3, after the whole test sampling period is finished, testing the performance of the concrete test piece 14 according to a test scheme.

s1, a carbonization test of concrete can be carried out in the environment simulation device, the carbon dioxide concentration is controlled to be 0% -30%, the allowable deviation is +/-0.2%, and the carbon dioxide concentration can be monitored in real time in the test process. At 2d before the start of the test, the concrete test piece 14 was dried at 60℃for 48 hours, and parallel lines were drawn at 10mm intervals along the length direction of the concrete test piece 14 as test points for the carbonization depth.

S2, the concrete test piece 14 is carbonized for 7d, 14d, 28d and 56d or is sampled after set time, and the operation process is executed according to the relevant regulations of the test method standard for the long-term performance and the durability of common concrete GB/T50082.

And S3, stopping the test when the carbonization depth of the concrete reaches a set depth or a set test time is reached.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. The utility model provides a concrete durability environment simulation device, includes the room body, its characterized in that still include control test system and with temperature control system (6), humidification system (8), gas control system (9), air conditioning system (5), rain system (4), salt fog system (7), illumination system (2) and ultraviolet infrared lamp system (3) that control test system is connected, the room body includes A room (24) and B room (25), A room (24) and B room (25) all with temperature control system (6), humidification system (8), gas control system (9), air conditioning system (5), rain system (4), salt fog system (7), illumination system (2) and ultraviolet infrared lamp system (3) are connected.

2. The concrete durability environment simulation device according to claim 1, wherein the chamber a (24) and the chamber B (25) adopt assembled warehouse board structures, the inner wall and the outer wall of the chamber a (24) and the chamber B (25) are stainless steel plates, the middle is filled with heat-insulating foaming materials, a chamber door is arranged on one side of the chamber a (24) and one side of the chamber B (25), and an observation window is arranged on the chamber door.

3. The concrete durability environment simulation device according to claim 1, wherein the temperature control system (6) comprises a refrigeration compressor and a titanium alloy electric heater, and the humidifying system (8) comprises a stainless steel armoured humidifier, a water cut-off protector, a water level automatic controller and an automatic water filling system; the air conditioning system (5) comprises a centrifugal fan, and an air outlet of the centrifugal fan is connected with the A chamber (24) and the B chamber (25); the rain system (4) comprises a spraying device and nozzles connected with the spraying device, and the nozzles with various different calibers are arranged at the top parts in the A chamber (24) and the B chamber (25); the illumination system (2) and the ultraviolet infrared lamp system (3) are arranged at the top parts in the A chamber (24) and the B chamber (25), and the ultraviolet infrared lamp system (3) comprises an ultraviolet lamp for performing experimental test on the ageing of a polymer test piece and an infrared lamp for performing temperature rising treatment on the environment.

4. The concrete durability environment simulation device according to claim 1, wherein the gas control system (9) is configured to control the carbon dioxide concentration inside the environment simulation device and to monitor the carbon dioxide concentration inside the environment simulation box in real time to perform a carbonization test on the concrete test piece.

5. The concrete durability environment simulation device according to any one of claims 1-4, further comprising a load system (22) for applying a load to the concrete test piece, the load system (22) comprising a loading device and a reaction frame for placing the concrete test piece (14), the loading end of the loading device being movable up and down relative to the reaction frame.

6. The concrete durability environment simulation device according to claim 5, wherein a chloride environment simulation device is detachably arranged in the A chamber (24) and the B chamber (25), the chloride environment simulation device comprises a chloride environment simulation box (10) and a liquid storage box (17), a chloride solution (18) is stored in the liquid storage box (17), a graduated scale (11) is arranged on the side wall of the chloride environment simulation box (10), a water filling pipe (12) and a water draining pipe (13) which are connected with the liquid storage box (17) are arranged at the bottom of the chloride environment simulation box (10), a water pump (23) for filling water and draining water is arranged on the liquid storage box (17), and a water spray stirrer (15) and a directional blower (16) for blowing up a concrete test piece (14) are arranged in the chloride environment simulation box (10).

7. The concrete durability environment simulation device according to claim 6, wherein the a chamber (24) and the B chamber (25) are detachably provided with a sulfate environment simulation device, the sulfate environment simulation device comprises a sulfate environment simulation box (19), the bottom of the sulfate environment simulation box (19) is loaded with a sulfate solution (21), and a porous material layer (20) for embedding the bottom of the concrete test piece (14) is arranged on the sulfate solution (21).