CN106290810B - A kind of early age deformation test system of contactless concrete - Google Patents
A kind of early age deformation test system of contactless concrete Download PDFInfo
- Publication number
- CN106290810B CN106290810B CN201610911492.9A CN201610911492A CN106290810B CN 106290810 B CN106290810 B CN 106290810B CN 201610911492 A CN201610911492 A CN 201610911492A CN 106290810 B CN106290810 B CN 106290810B
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- test cell
- concrete
- partition board
- probe
- displacement sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
- G01N33/383—Concrete, cement
Abstract
The purpose of the present invention is to provide a kind of early age deformation test systems of contactless concrete, including bottom plate, the first test cell, the second test cell, the front and rear sides of bottom plate are respectively mounted long template, first test cell and the second test cell are located on the left and right ends of bottom plate, second test cell is identical as the first test cell structure, is arranged symmetrically, bottom plate, the partition board of long template and the first test cell, the second test cell partition board constitute mold, casting concrete in mold.The problems such as present invention can solve inaccurate experimental result caused by testing the defect of system due to concrete deformation in the early age deformation experiment of concrete or even mistake and can not measure concrete expansion deformation and the deformation of concrete different height.
Description
Technical field
The present invention relates to a kind of concrete deformations to test system.
Background technology
During concrete early age deformation experiment, the concrete due to newly pouring completion can be produced with the growth of time
Raw certain cubic deformation, this stress can be contraction distortion, can also be dilatancy.Due to the side template of common die
It is irremovable, although the contraction distortion of concrete can be measured in this course, to studying the dilatancy band of concrete
Carry out bigger difficulty, cannot accurately evaluate the dilatancy of concrete.Existing contactless concrete shrinkage deformation test
The fixed frame of fixed displacement sensor is fixed on the both sides of mold in system, if the rigidity of mold is small or uses the modern designs of plastics
Tool, may be such that the deformation of concrete suffers restraints, and influence the accuracy of experimental result to a certain extent.At present for burying
It is placed in when metal target is fixed in concrete and there are problems that verticality, target and mold bottom surface can largely effect on deformation test knot
Fruit.And displacement sensor used in current concrete deformation experiment can only measure the deformation of concrete globality, and coagulation
The practical distortion of soil, on concrete vertical direction the deformation of different height be different, especially for the mixed of single side drying
Solidifying soil test specimen, there are deformation gradients.Therefore, it is difficult to accurately evaluate the practical distortion of concrete early stage.
It is not perfect due to normal concrete deformation test system so that the early deformation experimental result of concrete is inaccurate
Really, it needs scientific research personnel to be iteratively repeated experiment, not only wastes time the experimental result that cannot be satisfied with, nor with economy
Property.What is more important can not accurately measure the early expansion of concrete.This just need to concrete deformation test system into
Row improves and adjustment.
Invention content
The purpose of the present invention is to provide solve to test due to concrete deformation in the early age deformation experiment of concrete to be
Experimental result caused by the defect of system is inaccurate or even wrong and can not measure concrete expansion deformation height different with concrete
A kind of early age deformation test system of contactless concrete of the problems such as deformation of degree.
The object of the present invention is achieved like this：
A kind of early age deformation test system of contactless concrete of the present invention, it is characterized in that：Including bottom plate, the first test
The front and rear sides of unit, the second test cell, bottom plate are respectively mounted long template, and the first test cell and the second test cell distinguish position
On the left and right ends of bottom plate, the first test cell includes the partition board, side template, mark being successively set on from left to right on bottom plate
Target calibrated mount, holder, are provided with threaded probe on the outside of partition board, on side template setting for screwed probe across
Hole, the thread head of screwed probe is rotary with small-sized measurement target and across corresponding hole on side template, target correction
Frame is located at small-sized measurement target and by itself and screwed probe vertical, and pressing plate is arranged on partition board, is arranged in pressing plate hollow
Part, the hollow parts of pressing plate pass through partition board, and by the way that pressing plate is fixed in long template by the bolt on pressing plate by fixation every
Plate is welded with the screw of radial wire on the inside of partition board, installs displacement sensor on holder, the probe of displacement sensor with
The measurement zone of its corresponding screwed probe is aligned, and the second test cell and the first test cell structure are identical, symmetrical
Arrangement, bottom plate, the partition board of long template and the first test cell, the second test cell partition board constitute mold, pour in mold
Concrete.
The present invention can also include：
1, a screwed probe constitutes a measurement unit with a displacement sensor, and the measuring unit has six
Group, wherein three measurement units are located at the first test cell, excess-three measurement unit is located at the second test cell, six groups of measurements
Unit constitutes measuring system.
2, each displacement sensor is respectively provided with the knob and displacement sensor micro actuator of fixed displacement sensor.
Advantage of the invention is that：The present invention provides a kind of novel non-contact concrete deformations to test system.So that
It is possibly realized using the contactless early age dilatancy of test system evaluation concrete.During the experiment, experimental provision
Easy to assembly, experimental data favorable reproducibility, it can measure concrete on the basis of normal concrete deformation test system
Dilatancy, and can realize the gradient monitoring to concrete deformation.It is reduced simultaneously since experimental result is inaccurate or even wrong
The inconvenience and economic loss that accidentally problem is brought, it is simple and easy to do, time saving and energy saving, and this deformation used in the whole process is surveyed
Test system can improve conventional efficient, improve the accuracy of experimental result, achieve the purpose that the financial resources that use manpower and material resources sparingly, concrete
Deformation experiment can use this novel non-contact concrete deformation to test system, and this novel non-contact coagulation
Material price used in native deformation test system is relatively low with certain economy.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the vertical view of the present invention；
Fig. 3 is U-shaped gasket schematic diagram；
Fig. 4 is the schematic diagram of partition board and screwed probe；
Fig. 5 is partition board schematic diagram；
Fig. 6 is side template schematic diagram；
Fig. 7 is long template schematic diagram；
Fig. 8 is butterfly-type bolt schematic diagram；
Fig. 9 is displacement sensor schematic diagram；
Figure 10 is pressing plate schematic diagram；
Figure 11 is small-sized measurement target schematic diagram；
Figure 12 is long gasket sheet schematic diagram；
Figure 13 is target calibrated mount；
Figure 14 is the bolt with radial wire.
Specific implementation mode
It illustrates below in conjunction with the accompanying drawings and the present invention is described in more detail：
In conjunction with Fig. 1-14, special die (Fig. 1 and Fig. 2) is ready to before casting concrete.
Pass through the side template 14 at the aperture fixing mould both ends on long 13 top of template of mold with wing bolt 7.
Machine oil is painted in die inside, then puts the good plastic paper of two layers of montage, on plastic paper and side template 14
Three circular holes are opened in the concordant direction in hole, and aperture is sufficiently large, and also paint machine oil between two layers of plastic paper.
The gasket 15 of two long sheets is put between two layers of plastic paper.
Partition board 3 is placed on vertically on the inside of plastic paper while (probe number is according to experiment need by screwed probe 11
Determine) pass sequentially through three holes on side template vertical direction.
By vertical smooth being tightly attached on partition board 3 of cubic U-shaped gasket 5, (U-shaped gasket bottom junctions are placed in the following, being close to
Die bottom plate).
The hollow parts of pressing plate 6 are passed through gasket 5 and 15, partition board 3, then the bolt 4 on pressing plate are utilized to fix pressing plate 6
In the long template 13 of mold and then fix partition board 3.Ensure to make partition board 3, gasket 5 and 15 and side template 14 it is closely coupled
The bottom of partition board 3 is set to be close to die bottom plate 2 simultaneously.
The screw 17 for being welded with radial wire is tightened on partition board 3.
Target calibrated mount 16 is placed at the screwed probe of partition board 11, adjusting probe 11 makes itself and target calibrated mount 16
Vertically, to ensure that partition board 3 is vertical enough, experimental result will not be had an impact.
The concrete 1 that new stirring is completed is poured into special die.
Three small-sized measurement targets 12 are tightened on 11 both ends of screwed probe, then visit three displacement sensors
It first 9 is fixed on the holder on die bottom plate 2 (number of small-sized measurement target and sensor probe according to experiment it needs to be determined that).
Small-sized 12 central part of measurement target forms measuring system with displacement sensor probe 9.
Concrete deformation analyzer is opened, the micro actuator 10 of fixing device is adjusted by the displacement sensor in adjusting bracket
Displacement sensor probe 9 is finely adjusted, the state that experimental provision is transferred to optimum position is realized by Observe and measure instrument.
After 4~12h, when concrete reaches final set, the pressing plate 6 of stationary barrier 3 and gasket 5 and 15 is removed.
Finally gently two long gasket sheets 15 between two layers of plastic paper are extracted out.
The same dilatancy of experimentation for testing the deformation of concrete early age shrinkage, is only not required to take out long gasket sheet 15
Go out, the present invention repeats no more.
The invention also includes some such structure features：
Special die (Fig. 1 and Fig. 2) makes simply, and cost is relatively low, on the one hand, in the production process increases the rigidity of mold
Greatly.On the other hand, in concrete final set, (final setting time is generally concrete and pours for the part lengthened on the basis of script mold
Build in mold after 4~12h), by extracting two long gasket sheets between two layers of plastic paper out, created to concrete more
Deformation space, the dilatancy of concrete can be measured.
The probe 11 welded on special die partition board 3 is threaded, and small-sized measurement target 12 can be screwed directly pops one's head in herein
On, it can realize the gradient monitoring to concrete deformation.
The plastic paper of machine oil has been brushed in experimentation can make concrete sample Free Transform in a mold.
The probe 11 being welded on partition board is the hollow component that light aluminum alloy is process, and by it and small-sized measurement mark
Screwed component is processed into one end of target connection, will not be impacted to the deformation of concrete.
The screw 17 being tightened on partition board, due to being welded with radial wire, after having poured concrete in mold, meeting
So that concrete sample and partition board is become an entirety, realize while mobile, and then measures the expansion of test specimen by displacement sensor
And contraction distortion.
The small-sized measurement target 12 used in experiment is tightened on screwed probe 11, is not in that landing is made
It slips up at experiment, experimental error can be reduced to a certain extent.
The adjustment fixing device (figure nine) of displacement sensor, is directly anchored on the holder in special die, easy to operate,
It include the knob 8 of displacement sensor micro actuator 10 and fixed displacement sensor probe on holder.
Displacement sensor probe 9 with the adjustment that is aligned of small-sized measurement target 12 is realized by displacement sensor micro actuator 10
, displacement sensor micro actuator (itself inside have screw thread) is intermediate there are one the circular hole for passing right through displacement sensor electric wire,
Pop one's head in has screw thread to this part of electric wire outside of micro actuator, and stretching for displacement sensor probe can be realized by rotary fine adjustment device
Contracting.
With reference to shown in attached drawing, contactless concrete of the invention morning age deformation test system includes special die (Fig. 1
And Fig. 2), 11 (Fig. 4) of screwed probe, target calibrated mount 16, displacement sensor (Fig. 9), the adjustment of displacement sensor it is solid
Determine these parts device (Fig. 9).First special die (Fig. 1 and Fig. 2) is ready to, wing bolt 7 is passed through into long template 13
The side template 14 that mold is fixed behind hole paints in mold and puts two layers of plastic paper after machine oil, and two layers of plastic paper it
Between also paint machine oil, then the screw 17 for being welded with radial wire is tightened on partition board 3, partition board 3 is placed in mold
While screwed probe 11 on partition board 3 passed sequentially through into hole on side template 14, in sequence by two kinds of gaskets 5 and 15
Be placed in mold (long gasket sheet 15 is placed between two layers of plastic paper, cubic U-shaped gasket 5 be placed on partition board 3 and inner plastic paper it
Between), two kinds of gaskets 5 and 15 and partition board 3 are fixed with pressing plate 6, then the concrete 1 that new stirring is completed is poured into special die
(Fig. 1 and Fig. 2) is inner, and the probe 9 of displacement sensor is fixed on micromatic setting, displacement sensor is wired to concrete
Deformeter opens analyzer and accurately adjusts position by the micro actuator 10 in rotary displacement transducer adjusting apparatus (Fig. 9)
Displacement sensor probe 9 is aligned with the measurement zone on the small-sized measurement target 12 on the probe for stretching out concrete, makes concrete deformation
Analyzer, which is shown to, is adjusted to optimum position, then tightens knob 8.
Reach final set by 4~12h concrete, gently extracts long gasket sheet 15 out and (avoid drawing since operational motion is excessive
The displacement sensor probe for playing pinpoint accuracy shakes, and influences experimental result), measure the dilatancy of concrete.
The specific targets of each component of the present invention are as follows：
Bottom plate grows 700~750mm, and mold effective length (length of casting concrete) is 400mm, along die length side
To two long templates be welded on bottom plate, length be 410~420mm, be highly 100mm, in the two long templates
Both ends are punched at bottom plate about 9cm, and side template is fixed on to the both ends of mold using wing bolt.
Side template, length and height are 10cm, and thickness is 1.5~2cm.
Target, shape similar by top half is semicircle that radius is 3~3.5cm, and lower half portion is a length of 8~9cm, high
For the entirety that the rectangle of 10cm forms, thickness is 1~1.5cm, is located on the inside of side template, and target and side template
Between there are two types of plastic spacer.
4~6 apertures (aperture does not extend through target) are uniformly processed on the inside of target so as to mark screw means
On target.
Screw itself is about 5~8mm, and in varying numbers, rough surface and radial metal are welded on cap nut
Silk.
Pressing plate, a length of 12~13cm, width be 2~2.5cm, a height of 1.5~2cm, central hollow, hollow parts length 6~
7cm (suitable with target semicircle diameter), width are 13~19mm (suitable plus the thickness of gasket with target).And in pressing plate two
End is fixed in bolt in the long template of mold, and then fixing target keeps it vertical.
Plastic spacer includes two kinds, and thickness is 1.5~2mm, its shape of one of which is in cubic U-shaped, length 10cm；
Another kind is two panels long gasket sheet vertically, and two kinds of gaskets are that shape is smooth, there is certain rigidity.
On the vertical direction of mold target weld three be about 6~8cm probes (length according to actual tests demand and
It is fixed), top 0.5cm of first probe away from side template, second probe is popped one's head in away from first 3~4cm of probe, third away from mark
Target bottom end 0.5cm.
3 apertures concordant with the probe welded on target are processed on the vertical direction of mold side template, aperture is bigger
In probe diameter of section, probe can be made to be moved freely in aperture, realize and the gradient of concrete deformation is monitored.
Target fixed correction system tray is in inverted T-shape, and carbon steel material, surfacing, rigidity is larger.
Screwed probe is hollow component that light aluminum alloy is process, and one that it and measurement target are connected
Screwed component is processed at end, while probe is directly welded on target, the measurement target for being tightened on above be through
Cross the small-sized measurement target (a diameter of 1.0~1.5cm) of processing.
Claims (3)
1. a kind of early age deformation test system of contactless concrete, it is characterized in that：Including bottom plate, the first test cell,
The front and rear sides of two test cells, bottom plate are respectively mounted long template, and the first test cell and the second test cell are located at bottom plate
Left and right ends on, the first test cell include be successively set on from left to right on bottom plate partition board, side template, target correction
Frame, holder, are provided with threaded probe on the outside of partition board, on side template setting for screwed probe across hole,
The thread head of screwed probe is rotary with small-sized measurement target and across corresponding hole on side template, and target calibrated mount is located at
At small-sized measurement target and by itself and screwed probe vertical, pressing plate is set on partition board, hollow parts are set in pressing plate, presses
The hollow parts of plate pass through partition board, and stationary barrier by pressing plate is fixed in long template by the bolt on pressing plate, partition board
Inside be welded with the screw of radial wire, displacement sensor is installed on holder, the probe of displacement sensor is corresponding thereto
The measurement zone for the screwed probe answered is aligned, and the second test cell is identical as the first test cell structure, is arranged symmetrically, bottom
Plate, the partition board of long template and the first test cell, the second test cell partition board constitute mold, casting concrete in mold.
2. the early age deformation test system of a kind of contactless concrete according to claim 1, it is characterized in that：One band
Threaded probe constitutes a measurement unit with a displacement sensor, and the measuring unit has six groups, wherein three groups of measurements
Unit is located at the first test cell, and excess-three measurement unit is located at the second test cell, and six measurement units, which are constituted, measures system
System.
3. the early age deformation test system of a kind of contactless concrete according to claim 1 or 2, it is characterized in that：Often
A displacement sensor is respectively provided with the knob and displacement sensor micro actuator of fixed displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911492.9A CN106290810B (en) | 2016-10-20 | 2016-10-20 | A kind of early age deformation test system of contactless concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911492.9A CN106290810B (en) | 2016-10-20 | 2016-10-20 | A kind of early age deformation test system of contactless concrete |
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| Publication Number | Publication Date |
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| CN106290810A CN106290810A (en) | 2017-01-04 |
| CN106290810B true CN106290810B (en) | 2018-07-24 |
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| CN107014346B (en) * | 2017-05-31 | 2023-02-21 | 济南大学 | Device suitable for deformation after cement solidifies is tested |
| CN109696149A (en) * | 2019-02-21 | 2019-04-30 | 河海大学 | A kind of early age deformation measuring device of armored concrete and measurement method |
| CN110907488A (en) * | 2019-12-27 | 2020-03-24 | 哈尔滨工业大学 | Concrete freezing degree detection device and detection method thereof |
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