CN105424498B - Method for compression test in compression testing machine and high temperature in concrete material high temperature - Google Patents
Method for compression test in compression testing machine and high temperature in concrete material high temperature Download PDFInfo
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- CN105424498B CN105424498B CN201510959836.9A CN201510959836A CN105424498B CN 105424498 B CN105424498 B CN 105424498B CN 201510959836 A CN201510959836 A CN 201510959836A CN 105424498 B CN105424498 B CN 105424498B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The present invention provides in concrete material high temperature method for compression test in compression testing machine and high temperature, wherein, compression testing machine includes for applying stressed loading equipemtn, the heating device for heating concrete sample and the displacement acquisition device for measuring concrete sample deflection to concrete sample in concrete material high temperature.Compression testing machine in concrete material high temperature of the present invention, it is combined together the heating device of concrete test and loading equipemtn are ingenious, and it is aided with displacement acquisition device, form the comprehensive test system that can be used for compression test in concrete sample high temperature, it is synchronous with load to realize heating, can truly in simulated fire high temperature concrete environment, it is very close that the actual compressive property of concrete in the test result obtained and high temperature of fire is tested by compression testing machine progress concrete material in this concrete material high temperature, high temperature and fire resistance to study concrete material provide guarantee.
Description
Technical field
The present invention relates to a kind of concrete material testing machine for mechanical properties, especially a kind of for normal concrete, fiber
The testing machine of compression strength and constitutive relation in the material at high temperature such as concrete, regeneration concrete, high-strength concrete；Further relate to coagulation
The test method of compression strength and constitutive relation in the mechanical test method of soil material, especially concrete high temperature.
Background technology
Concrete is that purposes is most wide in engineering construction, the maximum construction material of dosage.In recent years, as concrete material exists
It is high-rise, towering, greatly across etc. particular service requirements and harsh environment application go deep into, to concrete material high temperature fire resistance propose
New requirement, is badly in need of corresponding high-temperature test facility to research and develop the high temperature fire resistance of concrete material.Existing concrete is high
The temperature elevation system and loading system of warm compression test equipment are often to detach, and cannot carry out coagulation in proper high temperature
The experiment of native compressive property, can only carry out after high temperature that concrete anti-compression performance is tried in concrete anti-compression performance test and approximate high temperature
It tests.Concrete anti-compression performance test is that concrete material is put into heating device to heat after high temperature, is stopped after reaching desired value
Heating is loaded after concrete material cooling on loading equipemtn.Concrete anti-compression performance test is then in approximate high temperature
It is that after concrete temperature in heating device reaches desired value, the condition of high temperature will be in tools such as special high temperature-resistant pliers immediately
Concrete material be put on compression testing machine and load.It is found in practical application, whether compression test after high temperature, or approximate
High temperature in compression test, resistance to compression test result and the actual crushing resistance of concrete in high temperature of fire in the concrete high temperature of gained
Can there be larger difference.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Invention content
Technical staff passes through prolonged research of technique, the reason of finding to generate the above problem finally, in concrete high temperature
The reason of compression test result differs greatly with the actual compressive property of concrete in high temperature of fire is：Due to concrete high temperature
The temperature elevation system of middle resistance to compression testing equipment and loading system are often to detach, and can not achieve cooperateing with for heating and load, load
When concrete sample temperature always it is different degrees of less than heating when target temperature, concrete sample in temperature-fall period,
Outside cooling is fast, and internal cooling is slow, to generate thermal stress gradient, causes the stress damage of concrete material, and then makes gained
Test result and the practical compressive property of concrete in high temperature of fire generate difference.Concrete anti-compression performance after high temperature is tried
It tests, the temperature of concrete is reduced to room temperature when load, and thermal stress is damaged clearly.For concrete anti-compression in approximate high temperature
Performance test, although concrete sample is loaded immediately after being taken out in heating device, temperature decline is less, due to load
When environment temperature far below the temperature in heating device, the thermal stress gradient of concrete sample is larger, and thermal stress damage is same
It is very important.
During research and development, technical staff encounters another technical problem, that is, measures the displacement meter of concrete deformation amount
Being put into heating device can be burned, if replacing the deflection of concrete sample with the displacement approximation of high temperature resistant pressure head, there are non-
Often big error.By the unremitting tackling key problem of technical staff, the reason of causing above-mentioned technical problem is had found：I.e. in hot environment
In, high temperature resistant pressure head and cushion block will appear deformation, compared with the deformation of concrete sample, the deformation of high temperature resistant pressure head and cushion block
It measures very important.
In addition, existing in relation to test method standard and specification, concrete material performance according to China（For example, compression strength）
It is to be determined according to the test result of lower 3 concrete samples of the same terms, therefore, it is necessary to solve 3 identical concrete samples
The problem of heating up and load under same high temperature environment.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：Resistance to compression tries in concrete material high temperature
Test machine, include for concrete sample apply stressed loading equipemtn, the heating device for heating concrete sample and
Displacement acquisition device for measuring concrete sample deflection；
The loading equipemtn includes pedestal, is fixed on the pedestal column is set on the column and along the column
Move up and down and position crossbeam, be fixed on crossbeam bottom top board, be fixed on top board bottom high temperature resistant seaming chuck, set
In the lower platen on the pedestal, the high temperature resistant push-down head on the lower platen and for the lower platen apply to
The load power source of upper active force；
The heating device include high temperature furnace supporting rack, the high temperature furnace on the high temperature furnace supporting rack and be set to high temperature
Heater in stove, between the top board and the lower platen, the top plate setting of the high temperature furnace supplies the high temperature furnace
The high temperature resistant seaming chuck is down through the upper perforation inside high temperature furnace, and the bottom plate setting of the high temperature furnace is under the high temperature resistant
Pressure head penetrates the lower perforation inside high temperature furnace upwards, and face is arranged in the vertical direction for the upper perforation and the lower perforation；
The displacement acquisition device includes two two displacement meters being set on the high temperature resistant seaming chuck, acquisition displacement meters
The displacement meter collecting cassette of information and two guide rod structures, the high temperature resistant guide rod of one of guide rod structure are longer than another guide rod
The high temperature resistant guide rod of structure, sets that there are two the pilot holes passed through for the two high temperature resistant guide rods on the top plate of the high temperature furnace.
Preferably, the high temperature resistant seaming chuck includes the seaming chuck bearing being fixedly arranged on the top board and is fixedly arranged on institute
The seaming chuck ontology on seaming chuck bearing is stated, the high temperature resistant push-down head includes the push-down head branch being fixedly arranged on the lower platen
Seat and the push-down head ontology being fixedly arranged on the push-down head bearing.
Preferably, the column top is equipped with screw thread, and the both ends rotation on the crossbeam is equipped with nut, is set on the crossbeam
It is useful for the motor of two nut rotations of driving, the crossbeam with the realization of the screw-thread fit of the column by moving up and down simultaneously
Positioning.
Preferably, the heating device further includes temperature control system and the temperature sensor in the high temperature furnace, described
Heater is Elema, and the temperature control system is connect with the temperature sensor sampling, the temperature control system and the Elema
Electrical connection.
Preferably, the guide rod structure include set on the seaming chuck bearing bottom surface on and with compression spring spring base with
And top is set to the high temperature resistant guide rod of the compression spring bottom end, the direction axially outside of the spring base is equipped with guide slit,
The lateral pressing plate of upper end setting of the high temperature resistant guide rod, the transverse direction pressing plate sliding is plugged in guide slit and the transverse direction pressing plate
For coordinating with the probe portion top pressure of the corresponding displacement meter, the displacement meter is set on the side wall of the seaming chuck bearing.
Preferably, further include pushing meanss, the pushing meanss include set on the high temperature furnace baseplate inner surface on and
It is inserted in high temperature furnace with the vertically disposed high temperature resistant guide rail of fire door, the high temperature resistant cushion block on the push-down head ontology, sliding
The power source that catch bar and the driving catch bar on side wall move back and forth, the bottom of the high temperature resistant cushion block is equipped with and institute
The sliding slot that high temperature resistant guide rail is slidably matched is stated, the catch bar is for pushing the high temperature resistant cushion block in the high temperature resistant sliding rail
Sliding.
Preferably, the power source includes electric machine support and the motor on electric machine support, the electric machine support packet
Two horizontally disposed leading screws being set on rear side of the high temperature furnace are included, motor is drivingly connected with the screw on the leading screw, silk
Graduated scale is equipped with by thick stick.
Preferably, further include computer, the computer is connect with the displacement meter collecting cassette information for acquiring displacement
The displacement signal of meter collecting cassette, the computer is connected with testing machine control box control to be added with will pass through testing machine control box control
Carry the load signal that power source applies upward active force to the lower platen and receives testing machine control box feedback.
The method that compression test in high temperature is carried out to concrete using compression testing machine in concrete high temperature, including walk as follows
Suddenly：
1. experiment 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, steel backing plate is set to
On upper and lower two faces of concrete sample；
2. opening fire door, the high temperature resistant guide rail in high temperature furnace shifts the high temperature resistant cushion block that 3 are placed with concrete sample onto
High temperature furnace furnace body most the inside, i.e., position shown in Fig. 2, the 1st concrete sample outmost at this time are located just at and can directly add
It is loaded into the loading position of row experiment；
3. closing high temperature furnace fire door, temperature Protonation constant, i.e. heating rate and constant temperature time are set on temperature control system, and
It begins to warm up；
After 4. stove inner concrete test specimen reaches defined target temperature and constant temperature time, start-up loading equipment makes lower platen
It moves up, push-down head ontology stops after jacking up high temperature resistant cushion block, starts crossbeam, so that top board is moved down, seaming chuck ontology
Stop when being contacted with the billet on concrete sample；
5. adjusting the position of displacement meter and high temperature resistant guide rod, make two high temperature resistant guide rods respectively against concrete sample both ends
Billet, while two displacement meters are respectively against the lateral pressing plate of two high temperature resistant guide rod upper ends；
6. pressure-loaded system is arranged on computers and starts to load；Lower platen can be according to the loading velocity of setting at this time
Constantly move up, and pass sequentially through push-down head bearing, push-down head ontology, high temperature resistant cushion block and billet transfer the load to it is mixed
On solidifying soil test specimen, it should be pointed out that seaming chuck ontology can generate certain deformation, concrete sample upper end with the increase of load
Also upward movement is had；Therefore, need to set up two displacement meters and measure respectively could accurately measure the upper and lower end of concrete sample
The displacement of generation；
7. after the 1st concrete sample load, test data is stored；Then lower platen, high temperature resistant pad are moved down
Block is fallen back on guide rail, and push-down head ontology and high temperature resistant cushion block disengage after stop moving；Then crossbeam is moved up, it is resistance to
High temperature guide rod and the billet at concrete sample both ends stop moving after disengaging；
8. starting the power source of pushing meanss, high temperature resistant cushion block is moved along guide rail to fire door direction under the action of catch bar
It is dynamic, stop movement after the 2nd concrete sample is moved to loading position；
9. repeat step 4.~6., the 2nd concrete sample is loaded；After load repeat step 7.~8., by the 3rd
A concrete sample is moved to loading position, again repeatedly step 4.~6., the 3rd concrete sample is loaded；
10. after 3 concrete sample whole loadeds, lower platen falls back to bottom, is then shut off loading equipemtn and high temperature
Stove, and fire door is opened, it is taken out out of stove after concrete sample cooling, experiment is completed.
The present invention has substantive features and progress compared with the prior art, specifically, resistance to compression in concrete material high temperature
Testing machine is combined together the heating device of concrete test and loading equipemtn are ingenious, and is aided with displacement acquisition device, is formed
It can be used for the comprehensive test system of compression test in concrete sample high temperature, high temperature furnace is set to upper pressure by high temperature furnace supporting rack
Between plate and lower platen, upper and lower perforation and pilot hole are provided on high temperature furnace so that the upper and lower pressure head of high temperature resistant and resistance to
High temperature guide rod can realize that heating is synchronous with load inside deep enough high temperature furnace, being capable of concrete in simulated fire high temperature
True environment, displacement acquisition device use two displacement meters and two guide rod structures, acquire concrete sample upper and lower ends respectively
Change in displacement data, well solved the big problem of error between collection value and true measurement, passed through this concrete material
Compression testing machine carries out concrete material compressive property and tests concrete in the test result obtained and high temperature of fire in material high temperature
Actual compressive property is very close, and the high temperature and fire resistance to study concrete material provide guarantee.
Further, column top is equipped with screw thread, and crossbeam is by moving up and down and determining with the realization of the screw-thread fit of column
Position, it is simple in structure, it is very easy to use.
Further, heating device further includes temperature control system and the temperature sensor in high temperature furnace, being capable of basis
Demand set temperature simultaneously automatically keeps set temperature.
Further, guide rod structure is simple, dexterously converts the movement of high temperature resistant guide rod to displacement meter probe portion
It is mobile so that displacement meter can be set to except high temperature furnace, prevented displacement meter by high temperature damage or influenced by high temperature and influence to measure
Precision.
Further, pushing meanss allow the high temperature resistant cushion block in high temperature furnace to be moved forward and backward, to reach primary liter
Temperature to the purpose of 3 concrete sample high temperature load, is met 1 specified in mechanical performance of concrete test method standard successively
The requirement of group 3 test specimens of compression test..
Further, power source includes electric machine support and the motor on electric machine support, and electric machine support includes setting
Two horizontally disposed leading screws being placed on rear side of the high temperature furnace, motor are drivingly connected with the screw on the leading screw, and motor exists
Movement is very convenient on leading screw, and graduated scale is equipped with by leading screw, the distance for monitoring motor and catch bar movement.
Further, computer connect the displacement for acquiring displacement meter collecting cassette with displacement meter collecting cassette information and believes
Number, computer is connected with testing machine control box control applies lower platen with will pass through testing machine control box control load power source
Upward active force and the load signal for receiving testing machine control box feedback.
The side for carrying out compression test in high temperature to concrete using compression testing machine in coagulation material soil high temperature of the present invention
Method can utilize compression testing machine in concrete high temperature, simply and efficiently complete to compression test in concrete high temperature, for research
The high temperature and fire resistance of concrete material provide guarantee.
Description of the drawings
Fig. 1 is the main structure diagram in the embodiment of the present invention.
Fig. 2 is the side structure schematic view in the embodiment of the present invention.
Fig. 3 is the enlarged drawing at Figure 1A.
Specific implementation mode
Below by specific implementation mode, technical scheme of the present invention will be described in further detail.
Compression testing machine in concrete material high temperature as shown in Figures 1 to 3, including is used to apply pressure to concrete sample
Loading equipemtn, the heating device for heating concrete sample, for measure concrete sample deflection displacement acquisition fill
It sets and the pushing meanss for pushing concrete sample to be moved to fire door direction；Loading equipemtn includes pedestal 6, is fixed on the bottom
Column 7 on seat 6, is fixed on the top board of crossbeam bottom at the crossbeam 9 for moving up and down and positioning on column 7 and along column 7
10, it is fixed on the high temperature resistant seaming chuck, the lower platen 11 on pedestal 6, the resistance to height on lower platen 11 of top board bottom
Warm push-down head and load power source for applying upward active force to lower platen 11,7 upper end of column are connected by cross bar 8 to increase
Stability, 1 column, 7 top is added to be equipped with screw thread, the both ends rotation on crossbeam 9 is equipped with nut（It is not shown in figure）, crossbeam 9 is equipped with
Motor for driving two nut rotations（It is not shown in figure）, crossbeam 9 in the realization of the screw-thread fit of column 7 by moving down
It moves and positions.High temperature resistant seaming chuck includes the seaming chuck bearing 16 being fixedly arranged on top board 10 and is fixedly arranged on seaming chuck bearing 16
On seaming chuck ontology 14, high temperature resistant push-down head includes the push-down head bearing 17 being fixedly arranged on lower platen 11 and is fixedly arranged on pushing
Push-down head ontology 15 on head bearing 17, high temperature resistant seaming chuck and high temperature resistant push-down head are by silicon nitride combined silicon carbide material
It is made, there are the excellent properties such as high rigidity, high intensity, high temperature resistant and high temperature creep-resisting；Heating device includes high temperature furnace supporting rack
2, the high temperature furnace 1 on the high temperature furnace supporting rack 2, the heater in high temperature furnace, temperature control system 5 and in the high temperature furnace
Temperature sensor 4, heater is Elema, is specially U-shaped Elema 3, temperature control system 5 and temperature sensor in the present embodiment
4 sampling connections, temperature control system 5 are electrically connected with U-shaped Elema, and temperature sensor 4 is corundum thermocouple, the front end of high temperature furnace furnace body
It is provided with fire door 28, for taking, putting concrete sample 20, fire door is provided with 2 small sircle holes, and stove inside information is observed when for heating and test
Condition.Between top board 10 and lower platen 17, the top plate of high temperature furnace is arranged for high temperature resistant seaming chuck down through height high temperature furnace 1
The upper perforation of warm furnace interior, the bottom plate of high temperature furnace is arranged penetrates the lower perforation inside high temperature furnace upwards for high temperature resistant push-down head, on
Face is arranged in the vertical direction for perforation and lower perforation；Displacement acquisition device includes two displacements being set on high temperature resistant seaming chuck
Meter 22, the displacement meter collecting cassette 23 and two guide rod structures for acquiring two displacement meter information, guide rod structure include being set to upper pressure
On the bottom surface of the head bearing 16 and spring base 30 with compression spring 29 and top is set to the high temperature resistant guide rod 24 of compression spring bottom end, spring
The direction axially outside of seat 30 is equipped with guide slit, the lateral pressing plate 31 of upper end setting of high temperature resistant guide rod, and lateral pressing plate 31 is slided
Dynamic to be plugged in guide slit and the transverse direction pressing plate is used to coordinate with the probe portion top pressure of corresponding displacement meter, displacement meter is set on upper pressure
On the side wall of head bearing 16, the high temperature resistant guide rod of one of guide rod structure is longer than the high temperature resistant guide rod of another guide rod structure
24, displacement meter 22 is grating displacement meter, sets that there are two the pilot holes passed through for two high temperature resistant guide rods on the top plate of high temperature furnace 1.
Pushing meanss include set on high temperature furnace 1 baseplate inner surface on and with 28 vertically disposed high temperature resistant guide rail 19 of fire door, be set to down
The catch bar 25 and drive catch bar 25 past that high temperature resistant cushion block 18, sliding on pressure head ontology 15 are inserted in high temperature furnace sidewall
The power source moved again, the bottom of high temperature resistant cushion block 18 are equipped with the sliding slot being slidably matched with high temperature resistant guide rail 19, and catch bar is used for
High temperature resistant cushion block 18 is pushed to be slided on high temperature resistant sliding rail 19, power source includes electric machine support 27 and is set on electric machine support 27
Motor 26, electric machine support includes two horizontally disposed leading screws being set on rear side of high temperature furnace, motor on the leading screw
Screw is drivingly connected, and graduated scale is equipped with by leading screw.Computer is connect with displacement meter collecting cassette information for acquiring displacement meter acquisition
The displacement signal of box, computer 13 connect dynamic will pass through the control load of testing machine control box 12 with the control of testing machine control box 12
Power source applies upward active force to lower platen 17 and receives the load signal of the feedback of testing machine control box 12, and load power source is liquid
Billet 21 is arranged in the bottom of seaming chuck ontology 14 and the top of high temperature resistant cushion block 18 when experiment in cylinder pressure.
Compression testing machine in the concrete material high temperature of the present embodiment, by the heating device and loading equipemtn of concrete test
It is ingenious to be combined together, and it is aided with displacement acquisition device, form the synthesis that can be used for compression test in concrete sample high temperature
Pilot system, high temperature furnace are set to by high temperature furnace supporting rack between top board and lower platen, are provided on high temperature furnace and are worn above and below
Hole and pilot hole so that the upper and lower pressure head of high temperature resistant and high temperature resistant guide rod can inside deep enough high temperature furnace, realize heating with
The synchronization of load, can truly in simulated fire high temperature concrete true environment, displacement acquisition device uses two displacements
Meter and two guide rod structures, respectively acquire concrete sample upper and lower ends change in displacement data, solve very well collection value with
The big problem of error between true measurement carries out concrete material experiment by compression testing machine in this concrete material high temperature
The actual compressive property of concrete is very close in the test result and high temperature of fire that obtain, to study the high temperature of concrete material
Guarantee is provided with fire resistance.Column top is equipped with screw thread, and crossbeam with the realization of the screw-thread fit of column by moving up and down simultaneously
Positioning, it is simple in structure, it is very easy to use.Heating device further includes temperature control system and the temperature sensor in high temperature furnace,
Set temperature and set temperature can be automatically kept according to demand.Guide rod structure is simple, dexterously by the movement of high temperature resistant guide rod
Be converted into the movement of displacement meter probe portion so that displacement meter can be set to high temperature furnace except, prevent displacement meter by high temperature damage or
It is influenced by high temperature and influences measurement accuracy.Pushing meanss allow the high temperature resistant cushion block in high temperature furnace to be moved forward and backward, to reach
The purpose that primary heating can load 3 concrete sample high temperature, meets in mechanical performance of concrete test method standard
The requirement of 3 test specimens of defined 1 group of compression test.Power source includes electric machine support and the motor on electric machine support, electricity
Machine support includes two horizontally disposed leading screws being set on rear side of the high temperature furnace, and motor drives with the screw on the leading screw
Connection, motor movement on leading screw is very convenient, and graduated scale is equipped with by leading screw, for monitor motor and catch bar movement away from
From.Computer connect the displacement signal for acquiring displacement meter collecting cassette, computer and testing machine with displacement meter collecting cassette information
Control box control connection is will pass through testing machine control box control load power source to the upward active force of lower platen application and receive
The load signal of testing machine control box feedback.
In other embodiments, unlike the embodiments above, crossbeam can also be fixed by jackscrew, high temperature resistant
Push-down head and high temperature resistant seaming chuck are column integral structure, and displacement meter is fixed on high temperature resistant seaming chuck, the guide rod structure
Probe portion for high temperature resistant guide rod, displacement meter is directly connected to high temperature resistant guide rod, and the power source can also be conductive push rod or gas
Cylinder pressure.
The embodiment of the method for compression test in high temperature, packet are carried out to concrete using compression testing machine in concrete high temperature
Include following steps：
1. experiment 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, steel backing plate is set to
On upper and lower two faces of concrete sample；
2. opening fire door, the high temperature resistant guide rail in high temperature furnace shifts the high temperature resistant cushion block that 3 are placed with concrete sample onto
High temperature furnace furnace body most the inside, i.e., position shown in Fig. 2, the 1st concrete sample outmost at this time are located just at and can directly add
It is loaded into the loading position of row experiment；
3. closing high temperature furnace fire door, temperature Protonation constant, i.e. heating rate and constant temperature time are set on temperature control system, and
It begins to warm up；
After 4. stove inner concrete test specimen reaches defined target temperature and constant temperature time, start-up loading equipment makes lower platen
It moves up, push-down head ontology stops after jacking up high temperature resistant cushion block, starts crossbeam, so that top board is moved down, seaming chuck ontology
Stop when being contacted with the billet on concrete sample；
5. adjusting the position of displacement meter and high temperature resistant guide rod, make two high temperature resistant guide rods respectively against concrete sample both ends
Billet, while two displacement meters are respectively against the lateral pressing plate of two high temperature resistant guide rod upper ends；
6. pressure-loaded system is arranged on computers and starts to load；Lower platen can be according to the loading velocity of setting at this time
Constantly move up, and pass sequentially through push-down head bearing, push-down head ontology, high temperature resistant cushion block and billet transfer the load to it is mixed
On solidifying soil test specimen, it should be pointed out that seaming chuck ontology can generate certain deformation, concrete sample upper end with the increase of load
Also upward movement is had；Therefore, need to set up two displacement meters and measure respectively could accurately measure the upper and lower end of concrete sample
The displacement of generation；
7. after the 1st concrete sample load, test data is stored；Then lower platen, high temperature resistant pad are moved down
Block is fallen back on guide rail, and push-down head ontology and high temperature resistant cushion block disengage after stop moving；Then crossbeam is moved up, it is resistance to
High temperature guide rod and the billet at concrete sample both ends stop moving after disengaging；
8. starting the power source of pushing meanss, high temperature resistant cushion block is moved along guide rail to fire door direction under the action of catch bar
It is dynamic, stop movement after the 2nd concrete sample is moved to loading position；
9. repeat step 4.~6., the 2nd concrete sample is loaded；After load repeat step 7.~8., by the 3rd
A concrete sample is moved to loading position, again repeatedly step 4.~6., the 3rd concrete sample is loaded；
10. after 3 concrete sample whole loadeds, lower platen falls back to bottom, is then shut off loading equipemtn and high temperature
Stove, and fire door is opened, it is taken out out of stove after concrete sample cooling, experiment is completed.
The method that the present embodiment carries out compression test in high temperature using compression testing machine in concrete high temperature to concrete, energy
Compression testing machine in concrete high temperature is enough utilized, is simply and efficiently completed to compression test in concrete high temperature, to study coagulation
The high temperature and fire resistance of soil material provide guarantee.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (7)
1. compression testing machine in concrete material high temperature, it is characterised in that:Including being used to apply stressed add to concrete sample
Equipment, the heating device for heating concrete sample and the displacement acquisition for measuring concrete sample deflection is carried to fill
It sets；
The loading equipemtn includes pedestal, is fixed on the pedestal column is set on the column and above and below the column
Move and position crossbeam, be fixed on crossbeam bottom top board, be fixed on top board bottom high temperature resistant seaming chuck, be set to institute
It states the lower platen on pedestal, the high temperature resistant push-down head on the lower platen and makees upwards for applying to the lower platen
Load power source firmly；
The heating device includes high temperature furnace supporting rack, the high temperature furnace on the high temperature furnace supporting rack and is set in high temperature furnace
Heater, the high temperature furnace is between the top board and the lower platen, described in the setting of the top plate of the high temperature furnace supplies
High temperature resistant seaming chuck supplies the high temperature resistant push-down head down through the upper perforation inside high temperature furnace, the bottom plate setting of the high temperature furnace
The lower perforation inside high temperature furnace is penetrated upwards, and face is arranged in the vertical direction for the upper perforation and the lower perforation；
The displacement acquisition device includes two two displacement meters being set on the high temperature resistant seaming chuck, acquisition displacement meter information
Displacement meter collecting cassette and two guide rod structures, the high temperature resistant guide rod of one of guide rod structure be longer than another guide rod structure
High temperature resistant guide rod, set that there are two the pilot holes passed through for the two high temperature resistant guide rods on the top plate of the high temperature furnace；
The column top is equipped with screw thread, and the both ends rotation on the crossbeam is equipped with nut, and the crossbeam is equipped with for driving
The motor of two nut rotations, the crossbeam are moved up and down simultaneously by the cooperation realization of the nut and the screw thread of the column
Positioning；
The guide rod structure includes on the bottom surface of seaming chuck bearing and the spring base with compression spring and top are set to compression spring
The high temperature resistant guide rod of bottom end, the direction axially outside of the spring base are equipped with guide slit, the high temperature resistant guide rod it is upper
End set transverse direction pressing plate, the transverse direction pressing plate sliding is plugged in guide slit and the transverse direction pressing plate is used for and corresponding institute's rheme
The probe portion top pressure cooperation of meter is moved, the displacement meter is set on the side wall of the seaming chuck bearing.
2. compression testing machine in concrete material high temperature according to claim 1, it is characterised in that：It is pressed in the high temperature resistant
Head includes the seaming chuck bearing being fixedly arranged on the top board and the seaming chuck ontology being fixedly arranged on the seaming chuck bearing,
The high temperature resistant push-down head includes the push-down head bearing being fixedly arranged on the lower platen and is fixedly arranged on the push-down head bearing
Push-down head ontology.
3. compression testing machine in concrete material high temperature according to claim 1, it is characterised in that：The heating device is also
Temperature sensor including temperature control system and in the high temperature furnace, the heater be Elema, the temperature control system with
The temperature sensor sampling connection, the temperature control system are electrically connected with the Elema.
4. compression testing machine in concrete material high temperature according to claim 2, it is characterised in that：Further include pushing dress
Set, the pushing meanss include set on the high temperature furnace baseplate inner surface on and with the vertically disposed high temperature resistant guide rail of fire door,
It is pushed away described in catch bar that high temperature resistant cushion block on the push-down head ontology, sliding are inserted in high temperature furnace sidewall and driving
The power source that lever moves back and forth, the bottom of the high temperature resistant cushion block are equipped with the sliding slot being slidably matched with the high temperature resistant guide rail,
The catch bar is for pushing the high temperature resistant cushion block to be slided on the high temperature resistant sliding rail.
5. compression testing machine in concrete material high temperature according to claim 4, it is characterised in that：The power source includes
Electric machine support and the motor on electric machine support, the electric machine support include two water being set on rear side of the high temperature furnace
The leading screw that plain cloth is set, motor are drivingly connected with the screw on the leading screw, and graduated scale is equipped with by leading screw.
6. compression testing machine in concrete material high temperature according to claim 4, it is characterised in that：Further include computer,
The computer connect the displacement signal for acquiring displacement meter collecting cassette, the computer with the displacement meter collecting cassette information
It is upward to lower platen application will pass through testing machine control box control load power source to control connection with testing machine control box
Active force and the load signal for receiving testing machine control box feedback.
7. the method for carrying out compression test in high temperature to concrete using compression testing machine in concrete high temperature, it is characterised in that packet
Include following steps：
1. experiment 3 concrete samples used are put on the high temperature resistant cushion block in high temperature furnace, steel backing plate is set to coagulation
On native upper and lower two faces of test specimen；
2. opening fire door, the high temperature resistant guide rail in high temperature furnace shifts the high temperature resistant cushion block that 3 are placed with concrete sample onto high temperature
Furnace body most the inside, i.e. position shown in Fig. 2, the 1st concrete sample outmost at this time be located just at can be loaded directly into
The loading position of row experiment；
3. closing high temperature furnace fire door, temperature Protonation constant, i.e. heating rate and constant temperature time are set on temperature control system, and start
Heating；
After 4. stove inner concrete test specimen reaches defined target temperature and constant temperature time, start-up loading equipment keeps lower platen upward
Mobile, push-down head ontology stops after jacking up high temperature resistant cushion block, starts crossbeam, top board is made to move down, seaming chuck ontology with it is mixed
Billet on solidifying soil test specimen stops when contacting；
5. adjusting the position of displacement meter and high temperature resistant guide rod, make two high temperature resistant guide rods respectively against the steel at concrete sample both ends
Backing plate, while two displacement meters are respectively against the lateral pressing plate of two high temperature resistant guide rod upper ends；
6. pressure-loaded system is arranged on computers and starts to load；Lower platen can be continuous according to the loading velocity of setting at this time
It moves up, and passes sequentially through push-down head bearing, push-down head ontology, high temperature resistant cushion block and billet and transfer the load to concrete
On test specimen, it should be pointed out that seaming chuck ontology can generate certain deformation with the increase of load, and concrete sample upper end also can
There is upward movement；Therefore, need to set up two displacement meters and measure respectively could accurately measure the upper and lower end of concrete sample and generate
Displacement；
7. after the 1st concrete sample load, test data is stored；Then lower platen is moved down, high temperature resistant cushion block returns
Fall on guide rail, and push-down head ontology and high temperature resistant cushion block disengage after stop moving；Then crossbeam, high temperature resistant are moved up
Guide rod and the billet at concrete sample both ends stop moving after disengaging；
Start the power source of pushing meanss, high temperature resistant cushion block moves along guide rail to fire door direction under the action of catch bar, waits for the
2 concrete samples stop movement after being moved to loading position；
Repeat step~, the 2nd concrete sample is loaded；Step is repeated after load~, mixed by the 3rd
Solidifying soil test specimen is moved to loading position, again repeatedly step~, the 3rd concrete sample is loaded；
After 3 concrete sample whole loadeds, lower platen falls back to bottom, is then shut off loading equipemtn and high temperature furnace, and beat
Blow-on door takes out after concrete sample cooling out of stove, and experiment is completed.
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| CN109668795A (en) * | 2019-01-30 | 2019-04-23 | 广东石油化工学院 | A kind of civil construction concrete strength experimental provision |
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