CN209727633U - A kind of device measuring early age tensile creep - Google Patents

A kind of device measuring early age tensile creep Download PDF

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Publication number
CN209727633U
CN209727633U CN201920459590.2U CN201920459590U CN209727633U CN 209727633 U CN209727633 U CN 209727633U CN 201920459590 U CN201920459590 U CN 201920459590U CN 209727633 U CN209727633 U CN 209727633U
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CN
China
Prior art keywords
concrete sample
early age
constraint template
tensile creep
bone
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Expired - Fee Related
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CN201920459590.2U
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Chinese (zh)
Inventor
袁娇娇
嵇晓雷
姜冠文
申佳宇
许智超
华景莉
仲星星
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Jiangsu Open University of Jiangsu City Vocational College
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Jiangsu Open University of Jiangsu City Vocational College
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Priority to CN201920459590.2U priority Critical patent/CN209727633U/en
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Abstract

A kind of device measuring early age tensile creep, comprising: constraint template, concrete sample, heat insulation formwork, bone-shaped mold, loading equipemtn, temperature sensor, displacement meter;The hollow structure that constraint template is arranged horizontally forms the space of casting concrete test specimen in internal layer, forms heat insulation formwork between internal layer and outer layer;Concrete sample is in bone-shaped, is arranged horizontally in internal layer, and both ends are stretched out constraint template and are fixed in bone-shaped mold, and one end is connected with fixing end, and the other end is connected with free end, and loading equipemtn passes through free end stretched force-applying;Temperature sensor passes through in constraint template insertion concrete sample, for the temperature inside real-time monitoring concrete sample;Being displaced count number is two, the opposite sides up and down of constraint template is separately mounted to, for measuring the horizontal displacement of concrete sample.The utility model can achieve the requirement of the maintenance mode such as thermostatic curing or adiabatic temperature rise, the precise measurement suitable for early age tensile creep.

Description

A kind of device measuring early age tensile creep
Technical field
The utility model belongs to concrete test device field, and in particular to a kind of dress for measuring early age tensile creep It sets.
Background technique
Creeping is the intrinsic mechanical property of concrete, is concrete under load action, increases and increased change at any time Shape.Tensile creep is to influence concrete pulling stress, predict an important factor for early-age crack, beams of concrete amount of deflection, and early age draws Stretching Creep Characteristics is one of the critical issue for determining concrete bracing.Therefore, have to the measurement of early age tensile creep It is significant.The test data and research crept at present about Analysis of Concrete Tensile are less, mainly due to the stretching of concrete It creeps to compare and is difficult to measure, change all faster early-age concrete tensile creep especially for physical and chemical properties, still Not developing being capable of generally used measuring device.
Utility model content
The utility model aiming at the shortcomings in the prior art, provides a kind of device for measuring early age tensile creep.
To achieve the above object, the utility model uses following technical scheme:
A kind of device measuring early age tensile creep characterized by comprising constraint template, concrete sample, heat preservation Template, bone-shaped mold, loading equipemtn, temperature sensor, displacement meter;The hollow structure that the constraint template is arranged horizontally, It includes internal layer and outer layer, and the space of casting concrete test specimen is formed in the internal layer, and heat preservation mould is formed between internal layer and outer layer Plate;The concrete sample is in bone-shaped, is arranged horizontally in internal layer, and the both ends stretching constraint template of concrete sample is simultaneously solid It is scheduled in bone-shaped mold, wherein the bone-shaped mold of one end is connected with the fixing end of loading equipemtn, the bone-shaped mould of the other end Tool is connected with the free end of loading equipemtn, and the loading equipemtn passes through free end stretched force-applying;The heat insulation formwork is by uniformly twining Circulating water pipe around internal layer forms, and the both ends of the circulating water pipe are respectively inlet and outlet, and circulating water pipe passes through circulation Liquid carries out temperature control to concrete sample;The temperature sensor passes through in constraint template insertion concrete sample, is used for Temperature inside real-time monitoring concrete sample;The displacement count number is two, is separately mounted to the phase up and down of constraint template To two sides, for measuring the horizontal displacement of concrete sample.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
It further, further include lotus dependent sensor, controller, computer and pick-up amplifier;The lotus dependent sensor peace Mounted in the force side of loading equipemtn, for measuring the stress of concrete sample;The computer, controller and loading equipemtn are successively It is connected, computer sends instructions to controller and receives the measurement data of lotus dependent sensor, controller control by pick-up amplifier The operation of loading equipemtn processed.
Further, the displacement meter includes horizontal displacement sensors, pull rod and a pair of of anchorage;The anchorage passes through constraint Template is simultaneously vertically fixed on concrete sample, two anchorage horizontal interval arrangements;The horizontal displacement sensors are mounted on it In on an anchorage, the pull rod is horizontally disposed, and one end of pull rod is connected with horizontal displacement sensors, and the other end of pull rod is fixed On another anchorage.
Further, the constraint template is horizontal steel frame.
Further, cross sectional dimensions is 150mm × 150mm, both ends maximum cross section ruler in the middle part of the concrete sample Very little is 150mm × 280mm, and the length of middle part straightway is 1140mm.
Further, the loading equipemtn uses stepper motor or testing machine.
Further, the circulating liquid of ethylene glycol and the mixing of water 1:1 ratio is passed through in the circulating water pipe.
Further, the displacement meter uses carbon-point type displacement sensor, and the horizontal space between a pair of of anchorage is 750mm。
The beneficial effects of the utility model are: horizontally disposed concrete sample, effectively reduces and is self-possessed to concrete sample not With the influence of stress at position;Uniform temperature control, and combination temperature sensor are carried out to constraint test specimen by circulating liquid Real-time monitoring, can reach thermostatic curing or adiabatic temperature rise etc. maintenance mode requirement;It can be in different curing conditions Under concrete sample is stretched or is compressed, the precise measurement suitable for early age tensile creep.
Detailed description of the invention
Fig. 1 is the mechatronics schematic diagram of the utility model.
Fig. 2 is the whole side sectional view of the utility model.
Fig. 3 is the partial schematic diagram of the utility model heat insulation formwork.
Appended drawing reference is as follows: constraint template 1, internal layer 1-1, outer layer 1-2, concrete sample 2, heat insulation formwork 3, circulating water pipe 3-1, water inlet 3-2, water outlet 3-3, bone-shaped mold 4, loading equipemtn 5, temperature sensor 6, displacement meter 7, horizontal displacement pass Sensor 7-1, pull rod 7-2, anchorage 7-3, lotus dependent sensor 8, controller 9, computer 10, pick-up amplifier 11.
Specific embodiment
According to the present invention will be described in detail below with reference to the accompanying drawings.
The device as shown in Figure 1 and Figure 2 for measuring early age tensile creep, specifically includes that constraint template 1, concrete sample 2, heat insulation formwork 3, bone-shaped mold 4, loading equipemtn 5, temperature sensor 6, displacement meter 7, lotus dependent sensor 8, controller 9, meter Calculation machine 10 and pick-up amplifier 11.
Constraint template 1 is a horizontal steel frame, can be stretched under different curing conditions to concrete sample 2 Or compression.Constraint template 1 is that casting concrete test specimen is formed in hollow structure, including internal layer 1-1 and outer layer 1-2, internal layer 1-1 2 space forms heat insulation formwork 3 between internal layer 1-1 and outer layer 1-2.Concrete sample 2 is in bone-shaped, including horizontally disposed In layer 1-1, the both ends of concrete sample 2 are stretched out constraint template 1 and are fixed in bone-shaped mold 4, wherein the bone-shaped of one end Mold 4 is connected with the fixing end of loading equipemtn 5, and the bone-shaped mold 4 of the other end is connected with the free end of loading equipemtn 5, load Stepper motor or testing machine etc. can be used by free end stretched force-applying in equipment 5.
Heat insulation formwork 3 is made of the circulating water pipe 3-1 of uniform winding internal layer 1-1, as shown in figure 3, the two of circulating water pipe 3-1 End is respectively water inlet 3-2 and water outlet 3-3, and circulating water pipe 3-1 carries out temperature control to concrete sample 2 by circulating liquid System.Wherein, constraint template 1 needs to reserve Inlet and outlet water corresponding with water inlet 3-2 and water outlet 3-3 on outer layer 1-2 in production Hole.Temperature sensor 6 passes through constraint template 1 and is inserted into concrete sample 2, inside real-time monitoring concrete sample 2 Temperature.
7 quantity of displacement meter is two, is separately mounted to the opposite sides up and down of constraint template 1, for measuring concrete examination The horizontal displacement of part 2.Displacement meter 7 includes horizontal displacement sensors 7-1, pull rod 7-2 and a pair of of anchorage 7-3.Anchorage 7-3 is passed through about Beam template 1 is simultaneously vertically fixed on concrete sample 2, two horizontal interval anchorage 7-3 arrangements.On the ectonexine of constraint template 1 Mounting hole corresponding with anchorage 7-3 is offered, constraint template 1 is avoided to have an impact the measurement of displacement meter 7.Horizontal displacement Sensor 7-1 is installed therein on an anchorage 7-3, and pull rod 7-2 is horizontally disposed, one end of pull rod 7-2 and horizontal displacement sensing Device 7-1 is connected, and the other end of pull rod 7-2 is fixed on another anchorage 7-3.
Lotus dependent sensor 8 is mounted on the force side of loading equipemtn 5, for measuring the stress of concrete sample 2.Computer 10, controller 9 and loading equipemtn 5 are sequentially connected, and computer 10 sends instructions to controller 9 and received by pick-up amplifier 11 The measurement data of lotus dependent sensor 8, controller 9 control the operation of loading equipemtn 5, and whole device forms one by computer-controlled Closed loop.
When being tested using the device, one end of concrete sample 2 is fixed on steel frame, the other end is connected to one Above a universal joint, universal joint is connected (or directly connecting testing machine) again with stepper motor, and installs lotus dependent sensor 8 and position Move meter 7, stress and deformation for real-time measurement concrete sample 2.In concreting into after die trial, immediately by temperature sensing Device 6 is inserted into 2 center of concrete sample, and the temperature of inside concrete can be monitored in real time in this way.Constraint template 1 by steel make and At template hollow has been evenly arranged circulating water pipe 3-1 around hollow space, passes through circulating liquid (ethylene glycol and water 1:1 ratio Mixing) temperature control is carried out to concrete sample 2, to reach the requirement of the maintenance mode such as thermostatic curing or adiabatic temperature rise.
Concrete sample 2 is in bone-shaped, and middle part cross sectional dimensions is 150mm × 150mm, and both ends cross-sectional dimension is 150mm × 280mm can guarantee that test specimen middle section stress is in equally distributed state in this way.Straightway in the middle part of test specimen Length is 1140mm.The use carbon-point type displacement sensor of displacement meter 7, the displacement of real-time measurement concrete sample 2, every 0.125ms, when concrete sample 2 is shunk or is expanded, carbon-point type displacement sensor can detect test specimen displacement, and stepping Motor automatically begins to movement and test specimen is returned to original position, to make the length stays constant of test specimen, it can be considered that test specimen State in Complete Bind.Lotus dependent sensor 8 will record load caused by lower movement.Measurement carries out immediately after pouring, often Half a minute acquires a data.
Before on-test, displacement meter 7 to be installed in advance, displacement meter 7 is made of anchorage 7-3 and carbon-point type sensor, anchorage The spacing of 7-3 is 750mm, penetrates and fixes out of steel form from outside to inside, plastic paper is uniformly covered on constraint mould The surrounding of plate 1 and bottom, to reduce the frictional resistance between heat insulation formwork 3 and concrete sample 2, avoid its to concrete about Beam shrinks bring adverse effect.During test, the concrete being stirred in advance is directly poured into constraint template 1, is poured Concrete is carried out while building to vibrate, guarantees the density of concrete, is poured after the completion of vibrating immediately with film paper by coagulation Soil sealing, avoids the evaporation of moisture, then covers template, and insertion temperature sensor 6 records the temperature inside concrete sample 2 in real time Degree.It is fixed after displacement meter 7 is returned to zero, open testing machine software, Selection experiment mode.After on-test, without human intervention, examination The machine of testing will automatically record data, until test specimen is broken, test stops.
It should be noted that the use of such as "upper", "lower", "left", "right", "front", "rear" cited in utility model Language is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness or Adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.
Above are merely preferred embodiments of the utility model, the protection scope of the utility model is not limited merely to above-mentioned Embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should be pointed out that pair For those skilled in the art, several improvements and modifications without departing from the principle of the utility model, It should be regarded as the protection scope of the utility model.

Claims (8)

1. a kind of device for measuring early age tensile creep characterized by comprising constraint template (1), concrete sample (2), Heat insulation formwork (3), bone-shaped mold (4), loading equipemtn (5), temperature sensor (6), displacement meter (7);The constraint template (1) The hollow structure being arranged horizontally comprising internal layer (1-1) and outer layer (1-2), the internal layer (1-1) is middle to form casting concrete The space of test specimen (2) forms heat insulation formwork (3) between internal layer (1-1) and outer layer (1-2);The concrete sample (2) is in bone Shape is arranged horizontally in internal layer (1-1), and the both ends of concrete sample (2) stretch out constraint template (1) and are fixed on bone-shaped mould Have in (4), wherein the bone-shaped mold (4) of one end is connected with the fixing end of loading equipemtn (5), the bone-shaped mold of the other end (4) it is connected with the free end of loading equipemtn (5), the loading equipemtn (5) passes through free end stretched force-applying;The heat insulation formwork (3) it is made of the circulating water pipe (3-1) of uniform winding internal layer (1-1), the both ends of the circulating water pipe (3-1) are respectively water inlet (3-2) and water outlet (3-3), circulating water pipe (3-1) carry out temperature control to concrete sample (2) by circulating liquid;It is described Temperature sensor (6) passes through in constraint template (1) insertion concrete sample (2), internal for real-time monitoring concrete sample (2) Temperature;Displacement meter (7) quantity is two, is separately mounted to the opposite sides up and down of constraint template (1), mixed for measuring The horizontal displacement of solidifying soil test specimen (2).
2. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: further include the quick sensing of lotus Device (8), controller (9), computer (10) and pick-up amplifier (11);The lotus dependent sensor (8) is mounted on loading equipemtn (5) Force side, for measuring the stress of concrete sample (2);The computer (10), controller (9) and loading equipemtn (5) according to Secondary to be connected, computer (10) sends instructions to controller (9) and receives the survey of lotus dependent sensor (8) by pick-up amplifier (11) Data are measured, controller (9) controls the operation of loading equipemtn (5).
3. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the displacement meter (7) Including horizontal displacement sensors (7-1), pull rod (7-2) and a pair of of anchorage (7-3);The anchorage (7-3) passes through constraint template (1) And it is vertically fixed on concrete sample (2), the two anchorage horizontal interval (7-3) arrangements;The horizontal displacement sensors (7-1) It is installed therein on an anchorage (7-3), the pull rod (7-2) is horizontally disposed, one end of pull rod (7-2) and horizontal displacement sensing Device (7-1) is connected, and the other end of pull rod (7-2) is fixed on another anchorage (7-3).
4. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the constraint template It (1) is horizontal steel frame.
5. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the concrete sample (2) middle part cross sectional dimensions is 150mm × 150mm, and both ends cross-sectional dimension is 150mm × 280mm, middle part straightway Length is 1140mm.
6. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the loading equipemtn (5) stepper motor or testing machine are used.
7. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the circulating water pipe The circulating liquid of ethylene glycol and the mixing of water 1:1 ratio is passed through in (3-1).
8. a kind of device for measuring early age tensile creep as described in claim 1, it is characterised in that: the displacement meter (7) Using carbon-point type displacement sensor, the horizontal space between a pair of of anchorage (7-3) is 750mm.
CN201920459590.2U 2019-04-08 2019-04-08 A kind of device measuring early age tensile creep Expired - Fee Related CN209727633U (en)

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CN201920459590.2U CN209727633U (en) 2019-04-08 2019-04-08 A kind of device measuring early age tensile creep

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4249848A1 (en) * 2022-03-22 2023-09-27 Aartesys AG Measuring device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4249848A1 (en) * 2022-03-22 2023-09-27 Aartesys AG Measuring device and method

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Granted publication date: 20191203