CN117871248A - Multi-station coupling effect recycled concrete mechanical property test system - Google Patents
Multi-station coupling effect recycled concrete mechanical property test system Download PDFInfo
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- CN117871248A CN117871248A CN202311817271.1A CN202311817271A CN117871248A CN 117871248 A CN117871248 A CN 117871248A CN 202311817271 A CN202311817271 A CN 202311817271A CN 117871248 A CN117871248 A CN 117871248A
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 230000001808 coupling effect Effects 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 12
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 10
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 10
- 241001330002 Bambuseae Species 0.000 claims description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 10
- 239000011425 bamboo Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 21
- 230000008859 change Effects 0.000 description 8
- 230000002457 bidirectional effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000012412 chemical coupling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of durability research of recycled concrete, and discloses a system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions, which comprises a loading mechanism for fixing a recycled concrete sample, wherein the loading mechanism is communicated with a seepage mechanism; the loading mechanism comprises a fixing component and a loading component, the regenerated concrete sample is fixed in the inner cavity of the loading component, and the loading component is communicated with the seepage mechanism; the loading assembly comprises a loading cylinder, and the upper end and the lower end of the loading cylinder are fixedly connected with the fixing assembly through force transmission blocks; the seepage mechanism comprises a seepage assembly, the seepage assembly is electrically connected with the monitoring assembly, and the seepage assembly is communicated with the pressurizing assembly. The invention has simple structure and convenient use, can conveniently realize the mechanical property of the recycled concrete under the coupling action of seepage, creep and chemical corrosion, can realize long-time test, study the service life of the recycled concrete, and provide the use data for the practical application safety of the recycled concrete.
Description
Technical Field
The invention belongs to the technical field of durability research of recycled concrete, and particularly relates to a system for testing mechanical properties of recycled concrete under the coupling effect of multiple working conditions.
Background
Along with the deep research of the construction waste recycled concrete, the application field of the construction waste recycled concrete is continuously expanded and is gradually applied to the working condition of the complex environment. The recycled concrete is subjected to creep deformation under the long-term load effect, the porosity is reduced due to the change of the solid framework structure, so that the seepage property of the recycled concrete is influenced, and the porosity and the permeability of the recycled concrete are also influenced when corrosive liquid is introduced; the regenerated concrete takes away part of soluble substances due to the corrosion effect in the seepage process, and the solid framework structure is changed to cause the increase of the porosity so as to influence the creep deformation of the regenerated concrete; the porosity and thus creep deformation are also affected by the chemical reaction, so that the mechanical properties of the recycled concrete are not single effect but the mutual coupling effect of seepage-creep-chemical coupling is considered in the actual use environment.
In order to ensure that the durability of the construction waste recycled concrete meets engineering requirements, the application designs a system for testing the mechanical properties of the recycled concrete under the coupling action of multiple working stations, so as to study the durability of the recycled concrete under the coupling action of seepage-creep-chemical coupling.
Disclosure of Invention
In order to solve the technical problems, the invention provides a system for testing the mechanical properties of the recycled concrete under the coupling action of multiple working stations, which can test the mechanical properties of the recycled concrete under the coupling action of seepage, creep and chemical under different stress levels, corrosion levels and water pressure.
In order to achieve the above purpose, the invention provides a system for testing mechanical properties of recycled concrete under the coupling action of multiple working stations, comprising: the device comprises a loading mechanism for fixing a regenerated concrete sample, wherein the loading mechanism is communicated with a seepage mechanism, and the seepage mechanism is electrically connected with a monitoring assembly;
the loading mechanism comprises a fixing component, a loading component is arranged on the fixing component, the regenerated concrete sample is fixed in an inner cavity of the loading component, and the loading component is in circulating communication with the seepage mechanism;
the loading assembly comprises a loading cylinder for fixing a regenerated concrete sample, and the upper end and the lower end of the loading cylinder are respectively communicated with the loading mechanism in a circulating way;
the upper end and the lower end of the loading cylinder are fixedly connected with the fixing assembly through force transmission blocks;
the seepage mechanism comprises a seepage assembly, the seepage assembly is electrically connected with the monitoring assembly, and the seepage assembly is communicated with a pressurizing assembly.
Preferably, the loading cylinder comprises a base fixedly connected with the force transmission block below, and the base is communicated with the seepage assembly; the top end of the base is fixedly connected with a fixed cylinder for fixing a recycled concrete sample, the top end of the fixed cylinder is connected with a loading piston communicated with the seepage assembly in a sliding manner, and the loading piston is abutted to the top end of the recycled concrete sample.
Preferably, a lower water permeable plate for supporting a recycled concrete sample is arranged at the bottom end of the inner cavity of the fixed cylinder, an upper water permeable plate in sliding connection with the inner wall of the fixed cylinder is abutted to the top end of the recycled concrete sample, and the bottom end of the loading piston is abutted to the upper water permeable plate.
Preferably, the outer wall of the recycled concrete sample is sleeved with a waterproof cylinder, the outer wall of the waterproof cylinder is attached to the inner wall of the fixed cylinder, and the upper end and the lower end of the waterproof cylinder are respectively abutted to the upper water permeable plate and the lower water permeable plate.
Preferably, the base is provided with a water collecting tank arranged in a conical manner, the bottom end of the water collecting tank is communicated with the seepage assembly, and the top end of the water collecting tank is correspondingly arranged with the bottom end of the lower water permeable plate.
Preferably, the force transmission block comprises contact blocks which are arranged up and down correspondingly, one ends of the mutual principle of the two contact blocks are fixedly connected with the loading assembly and the bottom end of the base respectively, an arc-shaped groove is formed between the opposite surfaces of the two contact blocks, and a force transmission ball is arranged in the arc-shaped groove.
Preferably, the loading assembly comprises two parallel support rods, a support piece and a pressure piece are arranged between the two support rods, and the two force transmission blocks are fixedly connected with the pressure piece and the support piece respectively.
Preferably, the support piece comprises a bottom plate arranged between the two support rods, a plurality of support springs are fixedly connected to the top end of the bottom plate, the top ends of the support springs are fixedly connected with the bottom ends of the support plates which are slidably connected between the two support rods, and the force transmission blocks below the support plates are fixedly connected with the support plates.
Preferably, the pressurizing piece comprises a top plate arranged between the two supporting rods, the bottom end of the top plate is fixedly connected with a pressurizing plate which is connected between the two supporting rods in a sliding mode, and the top end of the force transmission block above the pressurizing piece is fixedly connected with the bottom end of the pressurizing plate.
Preferably, the medium within the percolation assembly is a corrosive liquid.
Compared with the prior art, the invention has the following advantages and technical effects: the invention discloses a system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions, which is used for researching the performance change of the recycled concrete under seepage, creep and corrosion conditions; when the device is used, the recycled concrete sample is arranged in the loading mechanism, the seepage component drives the selected fluid to be coupled under a certain pressure for experiment, the monitoring component is used for monitoring the state of the fluid and the change of the recycled concrete sample, the recycled concrete sample can be tested for a long time, the change process of the recycled concrete under the condition of actual use is simulated, and the durability of the recycled concrete in engineering application is verified; the fixed component pressurizes the recycled concrete sample in the loading component, and meanwhile, the seepage component is communicated with the upper end and the lower end of the fixed component, so that fluid in the seepage component circularly flows in the recycled concrete sample; the upper end and the lower end in the loading cylinder are fixedly connected with the fixing component through force transmission blocks respectively, so that the loading pressure of the fixing component is uniformly transmitted to the recycled concrete sample; the seepage assembly is used for driving fluid seepage, and the pressurizing assembly arranged on the seepage assembly is used for adjusting fluid seepage pressure, so that the influence of different seepage pressures on the regenerated concrete sample is realized.
The invention has simple structure and convenient use, can conveniently realize the mechanical property of the recycled concrete under the coupling action of seepage, creep and chemical corrosion, can realize long-time test, study the service life of the recycled concrete, and provide the use data for the practical application safety of the recycled concrete.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:
FIG. 1 is an axial view of a system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions;
FIG. 2 is a schematic view of the structure of the loading cartridge of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2A in accordance with the present invention;
in the figure: 1. a recycled concrete sample; 2. a loading cylinder; 3. a force transmission block; 4. a base; 5. a fixed cylinder; 6. loading a piston; 7. a lower water permeable plate; 8. a water permeable plate is arranged on the upper part; 9. a waterproof cylinder; 10. a water collection tank; 11. a contact block; 12. an arc-shaped groove; 13. a force transmission ball; 14. a support rod; 15. a bottom plate; 16. a support spring; 17. a top plate; 18. a pressurizing plate; 19. a pressure sensor; 20. a lock nut; 21. a seal ring; 22. a flow meter; 23. a hydraulic gauge; 24. a displacement meter; 25. a bidirectional hydraulic cylinder; 26. a hydraulic system; 27. a seepage pipeline; 28. a water pump; 29. a liquid storage tank; 30. a recorder; 31. and a support plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-3, the embodiment provides a system for testing mechanical properties of recycled concrete under the coupling action of multiple working modes, which comprises: the device comprises a loading mechanism for fixing the regenerated concrete sample 1, wherein the loading mechanism is communicated with a seepage mechanism, and the seepage mechanism is electrically connected with a monitoring assembly;
the loading mechanism comprises a fixing component, the fixing component is provided with a loading component, the regenerated concrete sample 1 is fixed in an inner cavity of the loading component, and the loading component is in circulating communication with the seepage mechanism;
the loading assembly comprises a loading cylinder 2 for fixing the recycled concrete sample 1, and the upper end and the lower end of the loading cylinder 2 are respectively communicated with the loading mechanism in a circulating way;
the upper end and the lower end of the loading cylinder 2 are fixedly connected with the fixed component through a force transmission block 3;
the seepage mechanism comprises a seepage assembly, the seepage assembly is electrically connected with the monitoring assembly, and the seepage assembly is communicated with the pressurizing assembly.
The invention discloses a system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions, which is used for researching the performance change of the recycled concrete under seepage, creep and corrosion conditions; when the device is used, the recycled concrete sample 1 is arranged in the loading mechanism, the seepage component drives the selected fluid to be coupled under a certain pressure for experiment, the monitoring component is used for monitoring the state of the fluid and the change of the recycled concrete sample 1, the recycled concrete sample 1 can be tested for a long time, the change process of the recycled concrete under the condition of actual use is simulated, and the durability of the recycled concrete in engineering application is verified; the fixed assembly pressurizes the recycled concrete sample 1 in the loading assembly, and meanwhile, the seepage assembly is communicated with the upper end and the lower end of the fixed assembly, so that fluid in the seepage assembly circularly flows in the recycled concrete sample 1; the upper end and the lower end in the loading cylinder 2 are fixedly connected with the fixing component through the force transmission blocks 3 respectively, so that the loading pressure of the fixing component is uniformly transmitted to the recycled concrete sample 1; the seepage assembly is used for driving fluid seepage, and the pressurizing assembly arranged on the seepage assembly is used for adjusting fluid seepage pressure, so that the influence of different seepage pressures on the regenerated concrete sample 1 is realized.
Further, the recycled concrete sample 1 of the present embodiment was a cylindrical sample, the bottom surface had a diameter of 100mm and the height of 200mm.
In a further optimized scheme, the loading cylinder 2 comprises a base 4 fixedly connected with a force transmission block 3 below, and the base 4 is communicated with the seepage assembly; the top end of the base 4 is fixedly connected with a fixed cylinder 5 for fixing the recycled concrete sample 1, the top end of the fixed cylinder 5 is slidably connected with a loading piston 6 communicated with the seepage assembly, and the loading piston 6 is abutted with the top end of the recycled concrete sample 1. The base 4 is fixedly connected to the force transmission block 3, the fixed cylinder 5 is fixedly connected to the base 4, the recycled concrete sample 1 falls on the base 4, the top end of the recycled concrete sample is abutted through the loading piston 6 fixedly connected with the fixed component, and the pressure of the fixed component acts on the recycled concrete sample 1 through the loading component.
Furthermore, a channel which can be connected with an external pipeline is arranged in the loading piston 6, so that the loading in the vertical direction is realized and the water pressure is provided.
Further optimizing scheme, the inner chamber bottom of fixed section of thick bamboo 5 is provided with the lower water permeable plate 7 that is used for supporting recycled concrete sample 1, and recycled concrete sample 1's top butt has the last water permeable plate 8 with fixed section of thick bamboo 5 inner wall sliding connection, the bottom and the last water permeable plate 8 butt of loading piston 6. The two ends of the recycled concrete sample 1 are respectively provided with an upper water permeable plate 8 and a lower water permeable plate 7 which are propped against and used for supporting and fixing the recycled concrete sample 1, and meanwhile, the penetration of fluid is not affected.
Further, the upper water permeable plate 8 and the lower water permeable plate 7 are round cake-shaped steel plates provided with a plurality of water permeable holes, the thickness is 10mm, the diameter is 100mm, and the diameter of the water permeable holes is 2mm-5mm.
Further, be provided with on the sealing washer 21 between loading piston 6's the bottom and the upper water permeable plate 8, increase the leakproofness.
Further optimizing scheme, the outer wall cover of recycled concrete sample 1 is equipped with waterproof section of thick bamboo 9, and the outer wall laminating of waterproof section of thick bamboo 9 is at the inner wall of fixed section of thick bamboo 5, and waterproof section of thick bamboo 9 upper and lower both ends respectively with last water permeable plate 8 and lower water permeable plate 7 butt. The waterproof cylinder 9 is sleeved on the outer wall of the recycled concrete sample 1, so that leakage during fluid permeation is prevented, accuracy of a test result is guaranteed, fluid leakage is reduced, and external influence is prevented.
Further optimizing scheme, set up water catch bowl 10 that the toper set up on the base 4, the bottom and the seepage flow subassembly intercommunication of water catch bowl 10, the top of water catch bowl 10 corresponds the setting with the bottom of lower water permeable plate 7. The water collection tank 10 is used for connecting fluid seeping from the regenerated concrete sample 1 to the outside through an internal channel, and then, the fluid is collected and then flows back into the seepage assembly again, so that fluid circulation is realized.
According to a further optimization scheme, the force transmission block 3 comprises contact blocks 11 which are arranged up and down correspondingly, one ends of the two contact blocks 11 in principle are fixedly connected with the loading assembly and the bottom end of the base 4 respectively, an arc-shaped groove 12 is formed between opposite surfaces of the two contact blocks 11, and a force transmission ball 13 is arranged in the arc-shaped groove 12. The force transmission ball 13 is arranged between the arc grooves 12 between the two contact blocks 11, the force transmission ball 13 is an ultra-strength steel ball, the two contact blocks 11 are connected in a ball hinge mode, from the aspect of uniform loading of force, the ball hinge connection mode can uniformly apply pressure on a test piece, the stress of the test piece is uniform, the contracted data linear relationship is good, and an important effect on evaluating the contracted data is achieved.
In a further optimized scheme, the loading assembly comprises two support rods 14 which are arranged in parallel, a support piece and a pressure piece are arranged between the two support rods 14, and the two force transmission blocks 3 are fixedly connected with the pressure piece and the support piece respectively. The support between the two support rods 14 is used for supporting the loading assembly below, the pressing piece is used for pressing from top to bottom, and the force transmission blocks 3 at the two ends are used for guaranteeing the stability and uniformity of the loading pressure between the pressing piece and the support.
In a further optimized scheme, the supporting piece comprises a bottom plate 15 arranged between two supporting rods 14, a plurality of supporting springs 16 are fixedly connected to the top end of the bottom plate 15, the top ends of the supporting springs 16 are fixedly connected with the bottom end of a supporting plate 31 which is slidably connected between the two supporting rods 14, and a force transmission block 3 below is fixedly connected with the supporting plate 31; the pressurizing piece comprises a top plate 17 arranged between the two supporting rods 14, the bottom end of the top plate 17 is fixedly connected with a pressurizing plate 18 which is connected between the two supporting rods 14 in a sliding mode, and the top end of the upper force transmission block 3 is fixedly connected with the bottom end of the pressurizing plate 18. The bottom end of the bottom plate 15 is fixed on the supporting rod 14 through the locking nut 20, the bottom plate 15 supports the supporting plate 31 through a plurality of supporting springs 16, and the supporting plate 31 can move along with the pressure change; when the loading pressure changes, the position of the supporting plate 31 changes, so that the up-down stability is ensured, and meanwhile, the stress of the supporting plate 31 is transmitted to the supporting spring 16, so that the measuring error caused by long-time stress deformation of the supporting plate 31 is prevented; the top plate 17 is pressed down by the locking nut 20 at the top end to press the recycled concrete sample 1 by the pressing plate 18 and the force transmission block 3, and the top end of the pressing plate 18 is positioned and pressed by the locking nut 20 to prevent the pressing plate 18 from rebounding.
Furthermore, the thread shapes of the locking nut 20 and the supporting rod 14 resist pulling and pressure, so that the pressure relief phenomenon caused by thread separation or displacement is avoided, and the pressure deficiency caused by unstable locking is greatly reduced. The locking nut 20 can be overlapped, double nuts are locked, pressure is reliably locked, and data is truly and reliably ensured.
Further, a pressure sensor 19 is provided between the top plate 17 and the clamping plate for measuring the pressurizing pressure, the measuring range is 500MPa, and the measuring accuracy is 1.0MPa.
Further, the compression stroke of the supporting spring 16 is not less than 60mm, and the elastic modulus is large.
Further optimizing scheme, medium in the seepage flow subassembly is corrosive liquid. The medium in the seepage assembly is corrosive liquid, and the components and the PH value of the seepage assembly are set according to the region of use so as to simulate the chemical corrosion of the outside in the actual use process.
Further, the seepage assembly comprises seepage pipelines 27, and the seepage pipelines 27 are required to be subjected to corrosion prevention treatment, so that the durability of experimental equipment is improved.
Further, the inlet and the outlet of the seepage pipeline 27 are respectively provided with a flowmeter 22 and a hydraulic pressure meter 23, so that the flow and the pressure of corrosive fluid entering and exiting the regenerated concrete sample 1 are measured, wherein the flowmeter 22 adopts an integrated electromagnetic type, the measurement error is not more than 0.5% of the total process, the pressure-resistant grade is not less than 20.0MPa, the power supply is AC220V, the hydraulic pressure meter 23 can measure the pressure of the fluid in a seepage group, the measuring range is 10MPa, and the measurement precision is 0.01MPa.
Further, a liquid storage tank 29 and a water pump 28 are arranged on the seepage pipe and are used for driving corrosive fluid to circulate.
Further, a PH meter is disposed in the reservoir 29, so as to monitor the PH value of the corrosive fluid at any time, and ensure the stability of the corrosive fluid.
Further, the pressurizing assembly comprises a bidirectional hydraulic cylinder 25 arranged on a seepage pipeline 27, the bidirectional hydraulic cylinder 25 is communicated with a hydraulic system 26 for pressurizing and adjusting corrosive liquid,
further, a displacement meter 24 for measuring the deformation amount in the creep process, the height of which is adjusted, the measuring range is 20mm, and the measuring accuracy is + -0.1 mm is provided between the pressurizing plate 18 and the laminate.
Further, the monitoring assembly includes a recorder 30 for recording test parameters, the recorder 30 has no less than 5 data acquisition channels, the memory is greater than 128M, and the sampling frequency is no less than 1 time/second.
The using method comprises the following steps:
1. the regenerated concrete sample 1 is placed in the fixed cylinder 5, sealed with a waterproof jacket, placed with the loading piston 6 and the lower base 4 connected, and placed on the fixed assembly. The liquid reservoir 29 is provided with corrosive liquid with a predetermined pH value, and is connected with a seepage pipeline 27, the seepage pipelines 27 at the upper part and the lower part are connected with the pressure sensor 19, and a water pump 28 and the bidirectional hydraulic cylinder 25 are connected.
2. The reversing valve is regulated to the direction that the oil way can flow back to the hydraulic system 26, the water suction pump 28 is opened to convey corrosive liquid to the bidirectional hydraulic cylinder 25, and after the bidirectional hydraulic cylinder 25 stores water, the reversing valve is regulated to the direction that the oil pressure can be provided.
3. The recycled concrete sample 1 is loaded by the uppermost 2 locking nuts 20 to a set stress level, and the two locking nuts 20 of the second upper layer are screwed again to keep the stress level constant. When the pressure is increased to a set value and then the pressure is kept unchanged, an oil pressure system is started, corrosive liquid in the bidirectional hydraulic cylinder 25 is driven to enter the regenerated concrete sample 1 to perform mechanical property test under the action of seepage-creep-chemical coupling, and the values of the water pressure of the pressure sensor 19, the displacement extensometer, the water inlet and the water outlet are collected by the recorder 30.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (10)
1. The utility model provides a recycled concrete mechanical properties test system under multiplex job coupling effect which characterized in that includes: the device comprises a loading mechanism for fixing a regenerated concrete sample (1), wherein the loading mechanism is communicated with a seepage mechanism, and the seepage mechanism is electrically connected with a monitoring assembly;
the loading mechanism comprises a fixing assembly, a loading assembly is arranged on the fixing assembly, the regenerated concrete sample (1) is fixed in an inner cavity of the loading assembly, and the loading assembly is in circulating communication with the seepage mechanism;
the loading assembly comprises a loading cylinder (2) for fixing the recycled concrete sample (1), and the upper end and the lower end of the loading cylinder (2) are respectively communicated with the loading mechanism in a circulating way;
the upper end and the lower end of the loading cylinder (2) are fixedly connected with the fixing component through force transmission blocks (3);
the seepage mechanism comprises a seepage assembly, the seepage assembly is electrically connected with the monitoring assembly, and the seepage assembly is communicated with a pressurizing assembly.
2. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 1, wherein the system is characterized in that: the loading cylinder (2) comprises a base (4) fixedly connected with the force transmission block (3) below, and the base (4) is communicated with the seepage component; the top end of the base (4) is fixedly connected with a fixed cylinder (5) for fixing the recycled concrete sample (1), the top end of the fixed cylinder (5) is slidably connected with a loading piston (6) communicated with the seepage assembly, and the loading piston (6) is abutted to the top end of the recycled concrete sample (1).
3. The system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions according to claim 2, wherein the system is characterized in that: the lower water permeable plate (7) used for supporting the recycled concrete sample (1) is arranged at the bottom end of the inner cavity of the fixed cylinder (5), the top end of the recycled concrete sample (1) is abutted to the upper water permeable plate (8) which is slidably connected with the inner wall of the fixed cylinder (5), and the bottom end of the loading piston (6) is abutted to the upper water permeable plate (8).
4. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 3, wherein: the outer wall cover of recycled concrete sample (1) is equipped with waterproof section of thick bamboo (9), the outer wall laminating of waterproof section of thick bamboo (9) is in the inner wall of fixed section of thick bamboo (5), the upper and lower both ends of waterproof section of thick bamboo (9) respectively with go up porous disc (8) with lower porous disc (7) butt.
5. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 3, wherein: the water collection device is characterized in that a water collection tank (10) arranged in a conical mode is arranged on the base (4), the bottom end of the water collection tank (10) is communicated with the seepage assembly, and the top end of the water collection tank (10) and the bottom end of the lower water permeable plate (7) are correspondingly arranged.
6. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 5, wherein the system is characterized in that: the force transmission block (3) comprises contact blocks (11) which are arranged up and down correspondingly, one ends of the mutual principle of the two contact blocks (11) are respectively fixedly connected with the loading assembly and the bottom end of the base (4), an arc-shaped groove (12) is formed between opposite surfaces of the two contact blocks (11), and a force transmission ball (13) is arranged in the arc-shaped groove (12).
7. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 5, wherein the system is characterized in that: the loading assembly comprises two parallel support rods (14), a support piece and a pressure piece are arranged between the two support rods (14), and the two force transmission blocks (3) are fixedly connected with the pressure piece and the support piece respectively.
8. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 7, wherein the system is characterized in that: the support piece comprises a bottom plate (15) arranged between two support rods (14), a plurality of support springs (16) are fixedly connected to the top end of the bottom plate (15), the top ends of the support springs (16) are fixedly connected to the bottom ends of support plates (31) which are slidably connected between the two support rods (14), and the force transmission blocks (3) below are fixedly connected to the support plates (31).
9. The system for testing mechanical properties of recycled concrete under the coupling action of multiple working conditions according to claim 8, wherein the system is characterized in that: the pressurizing piece comprises a top plate (17) arranged between the two supporting rods (14), the bottom end of the top plate (17) is fixedly connected with a pressurizing plate (18) which is connected between the two supporting rods (14) in a sliding mode, and the top end of the force transmission block (3) above the pressurizing piece is fixedly connected with the bottom end of the pressurizing plate (18).
10. The system for testing mechanical properties of recycled concrete under coupling action of multiple working conditions according to claim 1, wherein the system is characterized in that: the medium in the seepage assembly is corrosive liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311817271.1A CN117871248A (en) | 2023-12-27 | 2023-12-27 | Multi-station coupling effect recycled concrete mechanical property test system |
Applications Claiming Priority (1)
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